U.S. patent application number 10/509113 was filed with the patent office on 2005-09-08 for sealing bag with chuck.
This patent application is currently assigned to Idemitsu Unitech Co., Ltd.. Invention is credited to Takamura, Ikuo, Tanaka, Kenichi.
Application Number | 20050196076 10/509113 |
Document ID | / |
Family ID | 28449530 |
Filed Date | 2005-09-08 |
United States Patent
Application |
20050196076 |
Kind Code |
A1 |
Tanaka, Kenichi ; et
al. |
September 8, 2005 |
Sealing bag with chuck
Abstract
A sealing bag with a chuck capable of surely enhancing an
easy-to-unseal property of the sealing bag without increasing the
size of the chuck and an entire bag and without causing
dissolution, flatness and the like at projected parts at the time
of bag-making. The sealing bag comprises a bag body 1 having an
opening part 1a at one end, a chuck 10 having a pair of tapes 11a
and 11b thermally fused near the opening part of the bag body 1 and
opposed to each other along the opening part 1a and a pair of
female and male clamping devices 12a and 12b formed on the opposed
faces of the pair of tapes 11 and disengageably clamped along the
opening part 1a to seal the bag body 1, and a pair of projected
parts 20a, 20b formed in a pair of projected lines at the bag body
opening side end edge part of the pair of tapes 11a and 11b and
integrally projected to the inner and outer surface sides of the
bag body 1a, wherein the pair of tapes 11 are thermally fused to
the inner face of the bag body, whereby the projected parts 20a and
20b are positioned on the inside of the opening edge part of the
bag body 1 and the projected parts 20a, 20b are not thermally fused
to the inner face of the bag body 1.
Inventors: |
Tanaka, Kenichi;
(Susono-shi, JP) ; Takamura, Ikuo; (Susono-shi,
JP) |
Correspondence
Address: |
STEPTOE & JOHNSON LLP
1330 CONNECTICUT AVENUE, N.W.
WASHINGTON
DC
20036
US
|
Assignee: |
Idemitsu Unitech Co., Ltd.
2-1, Koishikawa 1-chome Bunkyo-ku
Tokyo
JP
112-0002
|
Family ID: |
28449530 |
Appl. No.: |
10/509113 |
Filed: |
September 27, 2004 |
PCT Filed: |
March 27, 2003 |
PCT NO: |
PCT/JP03/03829 |
Current U.S.
Class: |
383/63 ;
383/65 |
Current CPC
Class: |
B65D 33/2508 20130101;
B65D 33/2533 20130101; B65D 33/007 20130101 |
Class at
Publication: |
383/063 ;
383/065 |
International
Class: |
B65D 033/16 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 27, 2002 |
JP |
2002-089666 |
Claims
1. A sealing bag with a chuck, comprising: a bag body which opens
on one side; and a chuck having a pair of tapes bonded near an
opening part of the bag body and opposed to each other along the
opening part of the bag body, and a pair of female and male
clamping parts formed on the faces of the pair of tapes opposed to
each other and disengageably clamping with each other along the
opening part of the bag body to openably/closably seal the bag
body, the sealing bag further comprising: projected parts formed in
projected lines at the bag body opening side edge parts of the pair
of tapes and integrally projected to inner and outer face sides of
the bag body, the pair of tapes being bonded to the inside of the
opening part in the inner face of the bag body in such a manner
that the projected parts are positioned inside the opening edge
part of the bag body.
2. The sealing bag with the chuck according to claim 1, wherein the
projections disposed on the pair of tapes are not thermally fused
onto the inner face of the bag body, when the pair of tapes are
bonded to the inner face of the bag body by thermal fusion.
3. The sealing bag with the chuck according to claim 1, wherein the
projected parts are disposed in the same position with respect to a
depth direction of the bag body.
4. The sealing bag with the chuck according to claim 3, wherein a
maximum width of the projected part in a projecting direction
inside and outside the bag body is 0.3 mm or more and is not more
than a distance between the faces of the tapes opposed to each
other.
5. The sealing bag with the chuck according to claim 3, wherein a
maximum width of the projected part in a projecting direction on
inner and outer face sides of the bag body is 0.5 mm or more and is
1/2 or less of a distance between the faces of the tapes opposed to
each other.
6. The sealing bag with the chuck according to claim 1, wherein the
projected parts are disposed in different positions with respect to
a depth direction of the bag body.
7. The sealing bag with the chuck according to claim 6, wherein a
maximum width of the projected part in a projecting direction on
inner and outer face sides of the bag body is 0.3 mm or more and
2.0 mm or less.
8. The sealing bag with the chuck according to claim 6, wherein a
maximum width of the projected part in a projecting direction on
inner and outer face sides of the bag body is 0.5 mm or more and
2.0 mm or less.
9. The sealing bag with the chuck according to claim 6, wherein a
maximum width of the projected part in a projecting direction on
inner and outer face sides of the bag body is 0.3 mm or more and is
not more than a distance between the faces of the tapes opposed to
each other.
10. The sealing bag with the chuck according to claim 6, wherein a
maximum width of the projected part in a projecting direction on
inner and outer face sides of the bag body is 0.5 mm or more and is
not more than a distance between the faces of the tapes opposed to
each other.
11. The sealing bag with the chuck according to claim 6, wherein a
shift of the projected part in a depth direction of the bag body is
in a range of 1.0 mm to 2.0 mm.
12. The sealing bag with the chuck according to claim 1, wherein
the projected part constitutes a protruded line having a circular
sectional shape.
13. The sealing bag with the chuck according to claim 1, wherein
the projected part constitutes a protruded line having an angled
sectional shape.
Description
TECHNICAL FIELD
[0001] The present invention relates to a sealing bag with a chuck
which is provided with a clamping type chuck (fastener) for
opening, closing or sealing the bag near an opening of a bag body
formed of a synthetic resin film or the like.
[0002] More particularly, the present invention relates to a
sealing bag with a chuck suitable for a small-sized sealing bag for
use in storing any of medical supplies, foods, miscellaneous goods
and the like, wherein projected parts which integrally project from
both inner and outer faces of a bag body are disposed on tape end
edge parts of the chuck and the projected parts are disposed on the
inside of the bag body not exposed via the opening without being
fused on a bag side, so that an easy-to-unseal property of the bag
can be surely enhanced without enlarging the chuck or the entire
bag and without causing fusion, flatness of the like of the
projected parts at the time of bag-making.
BACKGROUND ART
[0003] In general, sealing bags with chucks are known in which
female and male clamping type chucks formed of resins are bonded to
opening parts of bag bodies formed of synthetic resin films and the
like. As for the sealing bags with the chucks of this type, the
bags themselves can be inexpensively manufactured in large
quantities, and they are lightweight and superior in flexibility,
water resistance and the like. Moreover, the clamping type chucks
are freely opened and closed. Additionally, when the chuck is
closed, the bag can be easily sealed. Therefore, the bags have
broadly spread as containers or bags for storing any of medical
supplies, foods, miscellaneous goods and the like. In the chuck
disposed in this kind of sealing bag formed of the resin, a pair of
female and male clamping devices are disengageably formed on the
surface of a tape formed of the resin, and the tape is thermally
fused or otherwise treated near the opening in the bag body. When
female and male parts of the clamping devices are clamped or
unclamped, the opening of the bag is opened and closed, and the bag
is sealed in a clamped state of the clamping devices.
[0004] Here, to open/close the chuck disposed in the sealing bag,
when the bag is closed, the female and male parts opposed to each
other at a distance are partially positioned, and held in fingers,
the held places are pressed with the fingers to clamp the parts,
and the pressing fingers are moved along the opening part.
Accordingly, the female and male parts can be successively clamped
to close the whole chuck. Moreover, to open the chuck whose female
and male parts are clamped, the opening edge part of the bag body
is grasped and pulled on opposite sides with the fingers,
accordingly a clamped part of the female and male parts is
released, the chuck is successively detached from the unclamped
part, the whole chuck is unclamped, and the bag can be opened.
[0005] Additionally, in the sealing bag with the chuck, since the
bag body is formed by a thin film of polypropylene or the like, the
opening edge part of the bag held in the fingers in opening the
chuck easily slips. Especially when finger tips are wet or a weak
person tries to open the bag, the fingers slip, and the chuck
cannot be opened well.
[0006] In general, in this type of the sealing bag, the pair of
female and male clamping devices constituting the chuck are clamped
with a constant strength in such a manner that the bag can be
securely sealed, and the chuck cannot easily open. Therefore, with
the conventional sealing bag whose grasped parts easily slip, an
operation for unsealing the bag is difficult. The bag has a problem
in ease of using or opening especially as a bag for medical
supplies utilized by infants and old people or a bag for foods or
miscellaneous goods used by housewives at home.
[0007] To solve the problem, there has been proposed a sealing bag
with a finger nonslip structure, in which projections to be held in
fingers are disposed near the bag opening part in order to prevent
the fingers from slipping at the time of the unsealing and to
diminish difficulty in unsealing the chuck in the above-described
resin sealing bag.
[0008] FIGS. 11 and 12 show sections of the conventional sealing
bag provided with the finger nonslip structure which has heretofore
been proposed, FIG. 11 is a side sectional view of the entire
sealing bag, and FIG. 12 is a main part side sectional view near
the bag opening part.
[0009] The sealing bag shown in FIG. 11 has been proposed in
Japanese Utility Model Application Laid-Open No. 3-19313. A chuck
111 (referred to as "the railed fastener" in the publication) on
which a pair of female and male clamping devices 112 (112a, 112b)
are formed is bonded in such a manner as to continuously extend
outside an opening edge part of a bag body 101 formed of a resin,
outer edge parts of the chuck 111 are extended/bent outwards as
clamping parts 113a, 113b, and expanded parts 114a, 114b formed in
triangular sectional shapes as finger nonslip means are formed on
end edges of the clamping parts 113a, 113b. According to the
sealing bag, when the expanded parts 114a, 114b disposed on outer
endmost parts of the chuck 111 are held in the fingers, it is
possible to open the chuck 111 while the fingers do not slip at the
time of the unsealing of the bag.
[0010] Moreover, the sealing bag shown in FIG. 12 has been proposed
in Japanese Utility Model Application Laid-Open No. 5-76309. In the
same manner as in the sealing bag shown in FIG. 11, a chuck 211
(referred to as "the railed fastener" in the publication) on which
a pair of female and male clamping devices 212 (212a, 212b) are
formed is bonded in such a manner as to continuously extend outside
an opening edge of a bag body 201, outer edge parts of the chuck
211 are constituted as clamping parts 213a, 213b, and a plurality
of projections 214, 214 . . . constituting finger nonslip means are
formed on the surfaces of the clamping parts 213a, 213b. According
to the sealing bag, the plurality of projections 214, 214 . . . are
formed on the surface of the edge part of the chuck 211 are formed
at predetermined intervals, thick parts of the fingers can be
fitted among the plurality of projections 214, 214 . . . , and
accordingly the slippage of the fingers at the time of the
unsealing of the chuck can be prevented.
[0011] However, in the sealing bags provided with the finger
nonslip structures which have heretofore been proposed, as shown in
FIGS. 11 and 12, any chuck is continuously fused outwards from the
opening side edge part of the bag body, the outer edges of the
chuck are further extended outwards as the clamping parts, and
therefore there has been a problem that the entire bag including
the chuck is enlarged. The enlargement of the sealing bag by this
chuck has not raised any problem in the sealing bag enlarged in
such a manner that the bag itself accommodates large contents such
as bedclothes and clothes, but has largely influenced downsized and
thinned sealing bag for use in medical supplies, foods or the
like.
[0012] Additionally, in the structure in which the chuck
continuously extends outside the bag opening part, the chuck itself
constitutes the opening part, and the chuck is not covered in its
periphery. Therefore, at the time of the opening of the chuck, the
contents spill out, or foreign matters are easily mixed into the
bag. This has been a serious problem especially in a small-sized
sealing bag used for household or medical treatment, in which small
or fine matters, liquids and the like are stored.
[0013] Furthermore, in the sealing bag having the chuck formed on
the opening-side endmost part thereof, a problem also occurs that a
bag opening part cannot be sealed (top sealed). In this type of
sealing bag for use, for example, in distribution, the bag needs to
be completely sealed, and all four sides of the bag including the
opening part on a chuck side need to be sealed. Additionally, in
the sealing bag on which the chuck is disposed outside the opening
part of the bag and the clamping part for nonslip is formed, the
bag cannot be sealed on the opening side, and the bag cannot be
used especially in the sealing bag for the distribution.
[0014] Moreover, in the nonslip structure including the projections
(expanded parts) on the endmost parts of the chuck as in the
sealing bag shown in FIG. 11, since the continuing parts do not
exist outside the expanded parts, fingers' forces are concentrated
only on the expanded parts. As pointed out in the Japanese Utility
Model Application Laid-Open No. 5-76309, there has been a problem
that the expanded parts strongly bite into finger tips, and finger
tips become painful and numb.
[0015] On the other hand, in the structure in which the plurality
of projections are separately formed on the opposite surfaces of
the clamping parts as in the sealing bag shown in FIG. 12, there
has been a problem that the finger's forces are scattered to the
plurality of projections formed on different positions, and are not
easily exerted.
[0016] Here, as means for avoiding the problem of the conventional
sealing bag on which the chuck is continuously fused outside the
bag body as described above, it has been considered that the entire
chuck is minimized, and is disposed/fused on the inner face of the
bag body, and nonslip means such as projections are projected on
the inner face side of the bag.
[0017] However, when the chuck is simply disposed on the bag body
inner face, and the projections are only formed, the projections
can be projected only on the inner face side of the bag, and this
cannot be always said to be sufficient as the means for preventing
the fingers from slipping. When the chuck is fused to the bag body,
the projections disposed on the bag inner face are fused together
with the chuck, and flatted, and there has also been a possibility
that the projections do not function as the finger nonslip means.
Furthermore, to prevent the projections from being fused or
flatted, for example, it is also considered that the projections
are formed to be long beforehand in such a manner as to have
certain lengths even if fused. However, when the projections are
simply lengthened, the projections easily fall at the time of
manufacturing of the bags, the manufacturing becomes difficult.
Moreover, since the projections project long from the inside of the
bag, the fingers are not easily inserted into the bag opening part,
and additionally there has been a possibility that an
opening/closing property of the bag is impaired.
[0018] The present invention has been proposed to solve the
above-described problems of the conventional techniques, and an
object thereof is to provide a sealing bag with a chuck preferable
for a small-sized sealing bag for use especially in storing medical
supplies, foods, miscellaneous goods or the like, in which
projected parts integrally projecting from both inner and outer
side faces of a bag body are disposed on tape end edge parts of the
chuck and in which the projected parts are disposed on the inside
of the bag body not exposed via opening parts without being fused
on a bag side, so that an easy-to-unseal property of the bag can be
surely enhanced without enlarging the chuck or the entire bag and
without causing fusion or flatness at the projected parts at the
time of bag-making.
DISCLOSURE OF THE INVENTION
[0019] To achieve the above-described object, there is provided a
sealing bag with a chuck of the present invention, comprising a bag
body which opens on one side; and a chuck having a pair of tapes
bonded near an opening part of the bag body and opposed to each
other along the opening part of the bag body, and a pair of female
and male clamping parts formed on the faces of the pair of tapes
opposed to each other and disengageably clamping with each other
along the opening part of the bag body to openably/closably seal
the bag body, the sealing bag further comprising projected parts
formed in projected lines at the bag body opening side edge parts
of the pair of tapes and integrally projected to inner and outer
face sides of the bag body, the pair of tapes being bonded to the
inside of the opening part in the inner face of the bag body in
such a manner that the projected parts are positioned inside the
opening edge part of the bag body.
[0020] According to the sealing bag with the chuck of the present
invention constituted as described above, the projected parts are
disposed as means for preventing fingers from slipping at the time
of opening/closing of the bag along the end edge part of the chuck
which opens/closes and seals the bag body. The projected parts are
disposed inside the opening part of the bag body together with the
chuck. When the chuck and the projected parts are positioned inside
the bag body in this manner, the chuck or the nonslip structure
does not largely project to the outside of the bag, and the chuck
and the entire bag can be miniaturized.
[0021] Moreover, since the entire chuck including the projected
parts is structured in such a manner as to be accommodated in the
bag body, the opening edge part of the bag body can be further
extended to the outside of the chuck. Therefore, the entire opening
part provided with the chuck can be covered with the bag body, the
contents do not spill out, or any foreign matter does not penetrate
during the opening/closing of the sealing bag.
[0022] Furthermore, the projected parts of the present invention,
constituting the finger nonslip means of the sealing bag, is
constituted of, for example, projections having circular sectional
shapes and substantially uniformly and integrally projecting in
inner and outer face directions of the bag body in a state in which
the chuck is attached to the inner face of the bag body, and the
projections are positioned inside the bag without being exposed
from the bag body. By this constitution, since the projected parts
integrally project on the inner and outer face sides of the bag,
the projected parts can be firmly held in two fingers at one place
from the inner and outer faces of the bag. Additionally, since the
projected parts are positioned inside the bag body, the opening
edge part of the bag extends further outside the projected parts
held in the finger (on the side of the thick parts of the holding
fingers), and the extended bag edge parts can be held in the
fingers together with the projected parts.
[0023] Therefore, in the sealing bag of the present invention, when
the projected parts which project from the bag inner and outer
faces are held at one place, the projected parts can be firmly held
while the forces are not scattered. Moreover, since the bag edge
parts extending from the projected parts are also held, the forces
are not concentrated only on the projected parts, and the entire
opening edge part of the bag can be held. Accordingly, in the
present embodiment, the fingers do not slip, or any pain, numbness,
or the like is not generated on the finger tips, unlike the
conventional sealing bag, and the sealing bag can be easily,
smoothly, and securely unsealed. Additionally, in the projected
parts which can be simultaneously held at the same place from the
inside/outside of the bag, each projection width itself on the
inner or outer face side of the bag can be reduced, as compared
with projections and the like of the conventional sealing bag which
individually project to the inner or outer face side of the
conventional sealing bag. This eliminates the problem that the
falling or the like of the projections brings difficulty in the
manufacturing at the time of the bag-making or that the projections
project long from the bag inner face and the fingers are not easily
inserted in the opening part.
[0024] Moreover, in the sealing bag of the present invention, when
the pair of tapes are bonded to the inner face of the bag body by
thermal fusion, the projections disposed on the pair of tapes are
not thermally fused onto the bag body inner face. By this
constitution, when the chuck including the projected parts on the
edge parts is thermally fused to the bag body, the only remaining
part excluding the projected parts is fused on the back side, and
the projected parts can be prevented from being fused on the bag
side.
[0025] In general, the chuck disposed on the sealing bag formed of
a synthetic resin is thermally fused, and accordingly integrally
attached to the bag body. However, when the entire chuck including
the projected parts is thermally fused as such, there is a
possibility that the projected parts are thermally fused and
flatted, and do not function as the means for preventing the
fingers from slipping. In the present invention, by the
constitution in which the only remaining part of the chuck
excluding the projected parts is thermally fused on the bag side,
and the projected parts are not fused, the projected parts can be
prevented from being fused or flatted, and the projected parts can
effectively function as the finger nonslip means according to the
present invention.
[0026] Furthermore, in the sealing bag of the present invention,
the projected parts can be disposed in the same position or
different positions with respect to a depth direction of the bag
body. By the constitution in which the projected parts disposed
opposite to the inner face of the bag body are disposed in the
different positions in the depth direction of the bag, the
oppositely projected parts do not interfere with each other in a
state in which the chuck is clamped, that is, in a state in which
the sealing bag is closed. In the present invention in which the
projected parts do not interfere with each other in this manner, an
outer shape of each projected part can be set to an optimum size in
a range of a distance between the faces of the tapes opposed to
each other at the time of chuck clamping, the projected parts are
arbitrarily formed in sizes and shapes in such a manner that the
parts are easily held in the fingers and the fingers are easily
inserted between the projected parts, and an easy-to-unseal
property of the sealing bag can further be enhanced.
[0027] Moreover, a size of the projected parts according to the
present invention is constituted in such a manner that a maximum
width of the part in a projecting direction on the inner and outer
face sides of the bag body is 0.3 mm or more and is not more than a
distance between the faces of the tapes opposed to each other. By
this constitution, the size of the projected part can be set to be
maximum in a range in which the projected parts opposed to each
other at the time of the chuck clamping do not interfere with each
other between the faces of the tapes opposed to each other.
Especially, by a constitution in which the maximum width of the
projected part in the projecting direction on the inner and outer
face sides of the bag body is 0.5 mm or more and is 1/2 or less of
the distance between the faces of the tapes opposed to each other,
the projected parts can be further easily grasped, and the fingers
can be preferably easily inserted in a gap disposed between male
and female line parts.
[0028] In the small-sized sealing bag for use for any of medical
supplies and foods, for example, as for a tape having a tape
thickness of about 0.15 to 0.16 mm, the distance between the faces
of the tapes opposed to each other at the time of the chuck
clamping is generally about 1.5 mm. However, if the oppositely
projected parts which project from the faces of the tapes opposed
to each other interfere with each other between the tape faces
opposite to each other, the fingers are not easily inserted between
the projected parts at the time of bag unsealing, and the
easy-to-unseal property of the bag is impaired. On the other hand,
in a case where the projected parts are reduced in order to enhance
an insertion property of the fingers between the projected parts,
for example, when the projection width of the projected part is
less than about 0.3 mm, the projected part is excessively small, is
not easily held in the fingers, and does not function as the means
for preventing the fingers from slipping. To solve the problem, in
the present invention, for example, with respect to the tape having
a tape thickness of about 0.15 to 0.16 mm, the size of the
projected part is set in such a manner that the maximum width of
the part which projects to the inner or outer face side of the bag
body is 0.3 mm or more, and is not more than the distance between
the faces of the tapes opposed to each other at maximum, and the
maximum width is preferably 0.1 mm or more and is 1/2 (about 0.7
mm) or less of the distance between the faces of the tapes opposed
to each other. Accordingly, even when the projected parts are
disposed opposite to each other in the same position of the bag
body inner face, a finger holding property is secured. Moreover, a
total of the projection widths of the projected parts which project
between the faces of the tapes opposed to each other is set not to
exceed the distance (about 1.5 mm) between the faces of the tapes
opposed to each other, and the insertion properties of the fingers
are not impaired. Accordingly, in the present invention, there can
be provided a sealing bag in which holding properties of the
fingers and an easy-to-insert property are both secured in
satisfactory states, and which is superior in the easy-to-unseal
property.
[0029] On the other hand, in a case where the projected parts are
disposed in different positions in a depth direction of the bag
body, the size of the projected part is constituted in such a
manner that the maximum width of the part in the projecting
direction on the inner and outer face sides of the bag body is 0.3
mm or more and 2.0 mm or less, and the maximum width is preferably
0.5 mm or more. In this case, the size is preferably constituted
especially in such a manner that the maximum width of the part in
the projecting direction on the inner and outer face sides of the
bag body is 0.3 mm or more and is not more than the distance
between the faces of the tapes opposed to each other, and the
maximum width is preferably 0.5 mm or more. By this constitution,
in a case where the projected parts are disposed in such a manner
as to face each other in different positions at the time of the
chuck clamping, the projected part can further be formed to be
large in a maximum range of the distance between the faces of the
tapes opposed to each other.
[0030] As described above, in the small-sized sealing bag, with the
tape having a tape thickness of about 0.15 to 0.16 mm, the distance
between the faces of the tapes opposed to each other is about 1.5
mm at the time of the chuck clamping. On the other hand, when the
projection width of the projected part is less than 0.3 mm, the
holding properties of the fingers are deteriorated, and the
projected part does not function as the means for preventing the
fingers from slipping. Therefore, in the present invention, in a
case where the projected parts are disposed opposite to each other
in the different positions of the bag body inner face, the
projected parts are formed in such a manner that the projection
width on the bag body inner and outer face sides is entirely 0.3 mm
or more, 2.0 mm or less at maximum, preferably 0.5 mm or more, and
not more than the distance (about 1.5 mm) between the faces of the
tapes opposed to each other, for example, with respect to the tape
having a tape thickness of about 0.15 to 0.16 mm. Accordingly, each
projected part of the tape is formed to be largest in a range of
the distance between the faces of the tapes opposed to each other
without interfering with each other, the properties for preventing
the fingers from slipping are further enhanced, and the
easy-to-unseal property of the sealing bag can be further
enhanced.
[0031] Moreover, the projected part is constituted to form a
projection line having a circular sectional shape or a projection
line having an angled sectional shape. In this manner, the
sectional shape of the projected part according to the present
invention is not especially limited as long as the projection line
can integrally project to both the inner face side and the outer
face side of the bag body. For example, a projection line having a
circular sectional shape or a projection line having a quadrangular
or rhombic sectional shape can be constituted. That is, the
projected part according to the present invention can selectively
set to have a sectional shape optimum for the sealing bag to which
the present invention is applied in accordance with the size of the
sealing bag or the chuck, a clamping force of the chuck, and the
like. When the projected parts are disposed, it is possible to
realize the sealing bag with the chuck, which is superior in
versatility and expansibility.
BRIEF DESCRIPTION OF THE DRAWINGS
[0032] FIG. 1 is a side sectional view of an entire bag,
schematically showing a sealing bag provided with a chuck according
to a first embodiment of the present invention;
[0033] FIG. 2 is a side sectional view of a chuck part,
schematically showing the sealing bag with the chuck according to
the first embodiment of the present invention,
[0034] (a) shows a state in which the chuck is unclamped, and (b)
shows a state in which the chuck is clamped;
[0035] FIG. 3 shows the sealing bag with the chuck according to the
first embodiment of the present invention, (a) is a front view of
the entire bag, and (b) is an enlarged view of a part shown by a
two-dot chain line of (a);
[0036] FIG. 4 is a side sectional view of the chuck part, for
comparison of a size of a projected part in the first embodiment of
the present invention with that in a conventional sealing bag, (a)
shows the first embodiment of the present invention, and (b) shows
the conventional sealing bag;
[0037] FIG. 5 is a diagram showing a state in which an opening part
side of the sealing bag with the chuck is top-sealed according to
the first embodiment of the present invention, (a) is a side
sectional view, and (b) is an enlarged view of a bag front
part;
[0038] FIG. 6 is a perspective view of the bag viewed from above,
showing an operation for opening the sealing bag with the chuck
according to the first embodiment of the present invention;
[0039] FIG. 7 is an explanatory view schematically showing a bag
section, showing the operation for opening the sealing bag with the
chuck according to the first embodiment of the present
invention;
[0040] FIG. 8 is a side sectional view of the chuck part
schematically showing a modification of the sealing bag with the
chuck according to the first embodiment of the present invention,
(a) shows a case where the projected parts have square sectional
shapes, and (b) shows a case where the parts have rhombic
shapes;
[0041] FIG. 9 is a side sectional view of the chuck part,
schematically showing a modification of the sealing bag with the
chuck according to the first embodiment of the present invention,
in which a plurality of projected parts are formed on an end edge
part of each tape;
[0042] FIG. 10 is a side sectional view of the entire bag,
schematically showing the sealing bag with the chuck according to a
second embodiment of the present invention;
[0043] FIG. 11 is a side sectional view of the entire sealing bag,
showing the sealing bag including a finger nonslip structure near
an opening part of a conventional bag; and
[0044] FIG. 12 is a main part side sectional view near a bag
opening part, showing another sealing bag including the finger
nonslip structure near the opening part of the conventional
bag.
BEST MODE FOR CARRYING OUT THE INVENTION
[0045] Preferable embodiments of a sealing bag with a chuck
according to the present invention will be described hereinafter
with reference to the drawings.
First Embodiment
[0046] First, a first embodiment of the sealing bag with the chuck
according to the present invention will be described with reference
to FIGS. 1 to 9.
[0047] FIG. 1 is a side sectional view of an entire bag,
schematically showing the sealing bag provided with the chuck
according to the first embodiment of the present invention. FIG. 2
is similarly a side sectional view of a chuck part, schematically
showing the sealing bag with the chuck according to the present
embodiment, (a) shows a state in which the chuck is unclamped, and
(b) shows a state in which the chuck is clamped. FIG. 3 shows the
sealing bag with the chuck according to the present embodiment, (a)
is a front view of the entire bag, and (b) is an enlarged view of a
part shown by a two-dot chain line of (a). FIG. 4 is a side
sectional view of the chuck part, for comparison of a size of a
projected part in the present embodiment with that in a
conventional sealing bag, (a) shows the first embodiment of the
present invention, and (b) shows the conventional sealing bag.
[0048] As shown in these figures, the sealing bag with the chuck
according to the present embodiment is a sealing bag including a
bag body 1 formed in a bag shape having an opening part 1a which
opens on one side, and a chuck 10 of a female and male clamping
type, which is attached near the opening part 1a of the bag body
1.
[0049] Moreover, a pair of projected parts 20 (20a, 20b) which
project to bag inner and outer faces and constitute means for
preventing fingers from slipping at the time of bag opening/closing
are disposed on edge parts of a pair of tapes 11 constituting base
materials of the chuck 10 attached to the inner face of the bag
body 1.
[0050] The bag body 1 is a bag body formed of a resin into a bag
shape which opens on one side. In the bag body 1, usually two resin
films (a female-side film 2 and a male-side film 3) formed into
flat rectangular shapes are superimposed, or one resin film is bent
and superimposed. As shown in FIG. 3, three sides (or two sides)
excluding one side constituting the opening part 1a are laminated
by means such as thermal fusion (refer to laminated parts 5 shown
in FIG. 3), and the films are formed into a bag shape. Here, in
general, a film obtained by laminating a biaxially stretched
polypropylene film and a cast polypropylene film or the like is
used in the resin film constituting the bag body 1, and is cut into
various sizes in accordance with contents which are storage objects
to form the bag.
[0051] The chuck 10 is opening/closing means for openably sealing
the one-side opening part 1a of the bag body 1, and, as shown in
FIG. 1, includes a pair of tapes 11 (11a, 11b) disposed near the
opening part 1a of the bag body 1, and a pair of female and male
clamping devices 12 (12a, 12b) formed on the surfaces of the tapes
11.
[0052] The pair of tapes 11 are band-shaped members (see FIG. 3)
attached to the inner face of the bag body 1 and opposed to each
other along the opening part 1a, and are, as shown in FIG. 1,
constituted of the female-side tape 11a and the male-side tape 11b
which are base materials of the pair of clamping devices 12a, 12b.
The pair of tapes 11a, 11b are usually formed of a synthetic resin
such as polypropylene, and attached to the inner face of the bag
body 1 by thermal fusion.
[0053] Moreover, in the present embodiment, as shown in FIG. 3, the
pair of tapes 11a, 11b are attached to positions inside the bag
from the opening part 1a in the inner face of the bag body 1, and
the projected parts 20 formed along end edges of the tapes 11 are
not exposed from the opening part 1a of the bag body 1 as described
later.
[0054] The pair of clamping devices 12 are a pair of female and
male clamping means formed one by one on the respective surfaces of
the pair of tapes 11a, 11b opposed to each other, and are, as shown
in FIG. 1, constituted of the female-side clamping part 12a formed
on the female-side tape 11a and the male-side clamping part 12b
formed on the male-side tape 11b, and both the clamping parts 12a,
12b are disposed opposite to the same position on the inner face
side of the bag body 1.
[0055] Moreover, as shown in FIG. 2, when the female-side clamping
part 12a is disengageably clamped with the male-side clamping part
12b, the opening part 1a of the bag body 1 is openably sealed.
[0056] The pair of clamping devices 12 are formed integrally with
the tapes 11 constituting the base materials usually by a method
such as extrusion molding. Here, the pair of clamping devices 12
may have any constitution as long as the parts have clamping
structures (chuck structures) capable of openably sealing the bag
body 1. For example, in the present embodiment, as shown in FIG. 2,
the clamping devices are constituted of the female-side clamping
part 12a whose section substantially has a C-shape having a slit on
one side, and the male-side clamping part 12b which disengageably
clamps in the female-side clamping part 12a via this slit and whose
section has an arrowhead shape.
[0057] It is to be noted that in the present embodiment, a set
(streak) of the pair of clamping devices 12 are disposed on the
surfaces of the tapes 11, but at least one set of the clamping
devices 12 may be disposed. A plurality of streaks of clamping
devices 12 may be disposed such as a double chuck structure or the
like including double clamping devices 12.
[0058] In the chuck structure including a plurality of clamping
devices 12, since airtightness of the bag body 1 can be more
securely held, the structure is preferable as a chuck structure of
a sealing bag required to keep higher airtightness therein such as
a sealing bag which contains a liquid.
[0059] Moreover, the projected parts 20 (20a, 20b) constituting
finger nonslip means are formed on the respective end edge parts of
the pair of tapes 11 of the chuck 10 constituted as described
above. Details of the projected parts 20 according to the present
embodiment will be described with reference to FIGS. 1 to 4.
[0060] As shown in these figures, the projected parts 20 of the
present embodiment are a pair of projected members formed on the
end edge parts of the pair of tapes 11 on the side of the opening
part 1a of the bag body 1. Concretely, the projected parts 20 are
constitute of the female-side projected part 20a formed on the
female-side tape 11a and the male-side projected part 20b formed on
the male-side tape 11b, both the projected parts 20a, 20b are
disposed along the opening part 1a, and the parts face each other
in the same position of the bag body 1 in a depth direction
(vertical direction of the figure). Moreover, the projected parts
20a, 20b integrally project on the inner and outer face sides of
the films 2, 3 constituting the bag body 1. In the present
embodiment, as shown in FIGS. 1 and 2, projections are formed into
circular sectional shapes.
[0061] Here, in the projected part 20 having the circular sectional
shape, as shown in FIG. 4, projection widths (W.sub.1 and W.sub.2
shown in FIG. 4(a)) of the projected part on the inner and outer
face sides of the bag body 1 are substantially uniformly formed,
and a total maximum width (W shown in FIG. 4(a)) in the projecting
direction on the inner or outer face side of the bag is about 0.3
mm or more and not more than the distance between the faces of the
tapes opposed to each other, preferably 0.5 mm or more, and 1/2 or
less (about 0.7 mm or less) of the distance between the faces of
the tapes opposed to each other.
[0062] In general, in the small-sized sealing bag for use for any
of medical supplies and foods, when the tape (11a, 11b) has a
thickness of about 0.15 mm, the distance (D shown in FIG. 4(a))
between the faces of the tapes opposed to each other at the time of
the chuck clamping is generally about 1.5 mm. In the present
embodiment, the projected parts 20a, 20b face each other in the
same positions of the bag inner face. Therefore, when the projected
part and the oppositely projected part on the faces of the tapes
opposed to each other interfere with each other between the faces
of the tapes opposed to each other, the fingers are not easily
inserted between the projected parts at the time of the bag
unsealing, and the easy-to-unseal property of the bag is impaired.
On the other hand, when the total (W in FIG. 4) of the projection
widths of the projected part 20 on the bag outer face side (W.sub.1
in the same figure) and on the bag inner face side (W.sub.2 in the
same figure) is less than, for example, about 0.3 mm, the projected
parts are excessively small, are not easily held in the fingers,
and do not function as the means for preventing the fingers from
slipping.
[0063] To solve the problem, in the present embodiment, for
example, the sizes of the projected parts 20a, 20b are set in such
a manner that the maximum width W of the projected parts which
projects to the inner or outer face side of the bag body 1 is 0.3
mm or less, and is not more than the distance between the faces of
the tapes opposed to each other at maximum with respect to the tape
having a thickness of about 0.15 to 0.16 mm. This results in
W.sub.1.apprxeq.W.sub.2.apprxeq.0.67 mm. When the thickness of the
tape is set to 0.15 mm, W.apprxeq.0.67(W.sub.1)+0.67(W.s-
ub.2)+0.15 (tape thickness).apprxeq.-1.5 mm (W), and the total (W)
of the projection widths is not more than the distance between the
faces of the tapes opposed to each other at maximum.
[0064] Furthermore, the size is set in such a manner that the
maximum width W is preferably 0.5 mm or more, and 1/2 (about 0.7
mm) or less of the distance between the faces of the tapes opposed
to each other. In this case, for example, when
W.sub.1.apprxeq.W.sub.2.apprxeq.0.28 mm,
W.apprxeq.0.28(W.sub.1)+0.28(W.sub.2)+0.15 (tape
thickness).apprxeq.0.0.7 mm (W) including the thickness of 0.15 mm
of the tape, and the total (W) of the projection widths is 1/2 or
less of the distance between the faces of the tapes opposed to each
other at maximum.
[0065] In this manner, even when the projected parts 20a, 20b are
disposed opposite to each other in the same position of the bag
body inner face, the holding properties of the fingers are secured,
the total of the projection widths of the projected parts which
project between the faces of the tapes opposed to each other is set
not to exceed the distance (about 1.5 mm) between the faces of the
tapes opposed to each other, and the insertion properties of the
fingers are prevented from being impaired. Accordingly, in the
present embodiment, the pair of projected parts 20a, 20b
constituting the means for preventing the fingers from slipping can
be formed to be large at maximum in a range in which the parts do
not interfere with each other, and both the holding properties of
the fingers and the ease of insertion can be secured in
satisfactory states.
[0066] Moreover, the projected parts 20 substantially uniformly and
integrally projecting to the inner and outer face sides of the bag
body 1 in this manner can be simultaneously held in the same place
from the inside/outside of the bag with two finger or the like. As
shown in FIG. 4, each projection width on the inner or outer face
side of the bag can be reduced as compared with the projection
widths (w.sub.1 and w.sub.2 shown in FIG. 4(b)) of the projections
of a conventional sealing bag (see FIG. 12) which individually
project to the inner and outer face sides of the bag. As a result,
the total projection width can be reduced as compared with the
conventional bag (see W shown in FIG. 4(a) and w shown in (b) of
the same figure). Therefore, in the sealing bag provided with the
projected parts 20 of the present embodiment, for example, the
problem is eliminated that the manufacturing becomes difficult by
occurrence of falling or the like of the projection at the time of
the manufacturing of the bag body 1 or that the projection projects
long from the bag inner face and the fingers are not easily
inserted in the opening part. Therefore, a small-sized sealing bag
superior in the easy-to-unseal property can be efficiently
manufactured.
[0067] Furthermore, in the present embodiment, the pair of tapes 11
are bonded to the inner face of the bag body 1 by the thermal
fusion as described above, but the projected parts 20 formed on the
tapes 11 are prevented from being thermally fused onto the bag body
1. That is, in the present embodiment, when the chuck 10 including
the projected parts 20 on the tape end edge parts is thermally
fused on the side of the bag body 1, an only remaining tape part
excluding the projected parts 20 are fused on the bag side, and the
projected parts 20 are prevented from being fused on the bag side
(see FIG. 2).
[0068] The chuck 10 formed of a synthetic resin according to the
present embodiment is thermally fused and accordingly integrally
bonded to the bag body 1 in the same manner as in the usual sealing
bag. However, when the entire chuck including the projected parts
20 is thermally fused as such, the projected parts 20 are fused and
flatted by heat, and there is a possibility that the projected
parts do not function as the means for preventing the fingers from
slipping. To solve the problem, the present embodiment is
constituted in such a manner that the only remaining parts of the
tapes 11 excluding the projected parts 20 of the chuck 10 are
thermally fused on the bag side, and the projected parts 20 are not
thermally fused. Accordingly, the projected parts 20 are prevented
from being fused or flatted, and the projected parts 20 can be
effectively operated as the finger nonslip means.
[0069] Additionally, since the chuck 10 provided with the projected
parts 20 is entirely stored in the bag body 1, and the opening edge
parts of the bag body 1 extend outside the chuck 10, the opening
edge parts may be fused and top-sealed. When this type of sealing
bag is used, for example, for distribution, all the four sides of
the bag including the opening part on the chuck side need to be
sealed in order to completely seal the bag. In the sealing bag of
the present embodiment, since the opening edge parts of the bag
body 1 extend outside the chuck 10, as shown in FIG. 5, the opening
edge parts can be thermally fused or otherwise treated and
accordingly top-sealed (see a top-sealed part 5a shown in FIGS.
5(a) and (b). Accordingly, even when the projected parts 20 are
disposed, the sealing bag for the distribution requiring a high
sealing property can be provided without impairing a top seal
property.
[0070] It is to be noted that the projected part 20 according to
the present embodiment is constituted in such a manner that each
projection having a circular sectional shape is formed on the tape
11, but the sectional shape, the number of the projections or the
like is not especially limited as long as the projections can
integrally project on both the inner and outer face sides of the
bag body 1. For example, as shown in FIG. 8, the projected parts 20
may be constituted of the projections whose sections have angled
sectional shapes such as squares (the same figure (a)) and rhombic
shapes (the same figure (b)). Also with respect to the number of
the projected parts 20, for example, as shown in FIG. 9, a
plurality of projections can be formed on the end edge parts of the
respective tapes 11.
[0071] Moreover, in the present embodiment, as described above, the
maximum width W of each projected part 20 is set to be not more
than the distance (about 1.5 mm) between the faces of the tapes
opposed to each other in accordance with the tape thickness of
about 0.15 to 0.16 mm and the distance (about 1.5 mm) between the
faces of the tapes opposed to each other as described above, but,
needless to say, the value can be appropriately changed in
accordance with the thickness of the tape and the distance between
the faces of the tapes opposed to each other. For example, when the
distance between the faces of the tapes opposed to each other
exceeds 1.5 mm, the maximum width W of each projected part 20 can
be set to 1.5 mm or more. In this manner, the shapes, number, and
sizes of the projected parts 20 can be variously changed, and the
projected parts 20 having sectional shapes and the number of
projections optimum for the sealing bag to which the present
embodiment is applied can be selectively set in accordance with the
size of the bag body 1 or the chuck 10, the clamping force of the
chuck or the like.
[0072] Next, an opening/closing operation of the sealing bag with
the chuck according to the present embodiment constituted as
described above will be described with reference to FIGS. 2, 6, and
7. FIG. 6 is a perspective view of the bag viewed from above,
showing the operation for unsealing the sealing bag with the chuck
according to the present embodiment, and FIG. 7 is similarly an
explanatory view schematically showing a bag section, showing the
operation for unsealing the sealing bag.
[0073] First, the opening part 1a is open in a state (state shown
in FIG. 2(a)) in which the clamping of the chuck 10 disposed in the
bag body 1 is released. Therefore, arbitrary contents such as
medical supplies, foods or miscellaneous goods can be stored in the
bag body 1. After the contents are stored in the bag body 1, the
chuck 10 can be closed to seal the bag body 1.
[0074] When the chuck 10 is closed, the female-side clamping part
12a and the male-side clamping part 12b (see FIG. 2(a)) of the
chuck 10 opposed to each other at a distance are partially
positioned, and held in the fingers, and the held places are
pressed with the fingers to clamp both the clamping parts 12a, 12b
(see FIG. 2(b)). Moreover, the pressing fingers are moved along the
opening part, and both the clamping parts 12a, 12b are successively
clamped, so that the clamping devices 12 can be entirely
closed.
[0075] Next, when the chuck 10 in the clamped state (state shown in
FIG. 2(b)) of the clamping device 12 is opened, first the opening
edge parts of the bag body 1 are held in the fingers, and a pair of
projected parts 20 positioned in the bag edge parts are held in two
fingers, respectively (see FIG. 6). At this time, since the
projected parts 20 integrally project on the inner and outer face
sides of the bag body 1, as shown in FIG. 7, both the projected
parts 20a, 20b are firmly held in one place from the inner or outer
face of the bag with two fingers, respectively, and the projected
parts 20 are held in the thick parts of the holding fingers. Since
the opening edge parts of the bag body 1 extend outside the
projected parts 20 (palm side of the holding finger), as shown in
FIG. 7, the extending bag edge parts are held in the fingers
together with the projected parts 20.
[0076] When the bag body 1 is pulsed on the opposite sides in this
state, as shown in FIG. 6, a clamped part of the female-side
clamping part 12a and the male-side clamping part 12b is released,
the chuck 10 is successively unclamped as such from an unclamped
part, and accordingly the clamping of the entire clamping device 12
can be released. Accordingly, the sealing by the chuck 10 is
released, and the bag body 1 is opened to remove/insert the
contents. After storing the contents, the chuck 10 is closed in the
same manner as described above, and the bag body 1 can be
sealed.
[0077] As described above, according to the sealing bag with the
chuck according to the present embodiment, the projected parts 20
constituting the means for preventing the fingers from slipping at
the time of the opening/closing of the bag are disposed along the
end edge parts of the chuck 10 which opens/closes or seals the bag
body 1, and the projected parts 20 are disposed together with the
chuck 10 to be positioned inside the opening part 1a of the bag
body 1. Therefore, unlike the conventional sealing bag, the chuck
or the nonslip structure does not largely project outside the bag,
and the chuck and the entire bag can be miniaturized. In the
present embodiment in which the entire chuck 10 including the
projected parts 20 is stored in the bag body 1 in this manner, the
opening edge parts of the bag body 1 further extend outside the
chuck 10, and the entire opening part 1a including the chuck 10 is
covered with the side-face films 2, 3 of the bag body 1. Therefore,
the contents do not spill out, or any foreign matter does not
penetrate during the opening/closing of the sealing bag, and the
opening part can be top-sealed.
[0078] Moreover, in the present embodiment, the projected parts 20
constituting the finger nonslip means of the sealing bag are
constituted of the projections substantially uniformly and
integrally projecting to the inner and outer face sides of the bag
body 1 and having circular sectional shapes or the like in a state
in which the chuck 10 is bonded to the inner face of the bag body
1, and the projections are positioned inside the bag without being
exposed from the opening part 1a of the bag body 1. Therefore,
during the opening/closing of the bag, the projected parts 20
integrally projecting to the inner and outer face sides of the bag
body 1 can be firmly held in one place from the bag inner or outer
face with two fingers.
[0079] Additionally, since the projected parts 20 are positioned
inside the bag body, the bag opening edge parts extend further
outside the projected parts 20 held in the fingers (palm side of
the holding finger), and the extending part can be held in the
fingers together with the projected parts 20.
[0080] Therefore, according to the sealing bag of the present
embodiment, the projected parts 20 which project from the bag inner
and outer faces can be held in one place, therefore the projected
parts 20 can be firmly held without scattering any force, and the
bag edge parts extending from the projected parts 20 can also be
held together. Therefore, any force is not concentrated on the
projected parts 20 only, and the bag edge parts can be held.
Accordingly, the fingers do not slip, any pain, numbness, or the
like is not generated in the finger tips as in the conventional
sealing bag, and the sealing bag can be easily, smoothly, and
securely opened.
[0081] Moreover, in the projected parts 20 which can be
simultaneously held in the same place from the bag inside/outside
in this manner, each projection width itself on the inner and outer
face sides of the bag body 1 can be reduced as compared with the
projections and the like of the conventional sealing bag which
individually project to the inner and outer face sides of the bag.
This eliminates the conventional problem that the manufacturing
becomes difficult by the occurrence of the falling or the like of
the projections at the time of the bag-making or that the
projections project long from the bag inner face and the fingers
are not easily inserted in the opening part.
[0082] Furthermore, in the present embodiment, when the chuck 10
including the projected parts 20 on the respective edge parts of
the tapes 11 is thermally fused onto the bag body 1, the only
remaining parts of the tapes 11 excluding the projected parts 20
are fused on the bag side, and the projected parts 20 are prevented
from being fused on the bag side. Therefore, the projected parts 20
can be prevented from being fused or flatted, and the projected
parts 20 can be effectively operated by the finger nonslip means of
the sealing bag according to the present embodiment.
Second Embodiment
[0083] Next, a second embodiment of the sealing bag with the chuck
according to the present invention will be described with reference
to FIG. 10. FIG. 10 is a side sectional view of the entire bag,
schematically showing the sealing bag with the chuck according to
the second embodiment of the present invention.
[0084] The sealing bag with the chuck according to the present
embodiment shown in the same figure is a modification of the
above-described first embodiment, and the projected parts 20
disposed opposite to each other in the same position in the bag
body 1 in the first embodiment are disposed in different positions
with respect to a depth direction of the bag body 1. The other
constituting parts are similar to those of the first embodiment,
similar constituting parts are denoted with the same reference
numerals as those of the first embodiment, and detailed description
thereof is omitted.
[0085] Concretely, as shown in FIG. 10, in the projected parts 20
according to the present embodiment, a male-side projected part 20b
is positioned inwards from a female-side projected part 20a in the
bag with respect to the depth direction of the bag body 1 (vertical
direction of the figure), and the positions of both the projected
parts 20a, 20b differ by about 1 mm in the depth direction of the
bag body 1. Moreover, in the present embodiment, projection widths
(see W.sub.1 and W.sub.2 of FIG. 4(a)) of the projected parts 20
formed into circular sectional shapes on bag inner and outer face
sides are substantially uniformly formed in the same manner as in
the first embodiment, and a maximum width (see W shown in FIG.
4(a)) of a projecting direction on bag inner and outer face sides
is constituted to be 0.3 mm or more and 2.0 mm or less, and the
maximum width is preferably 0.5 mm or more.
[0086] As described above, in the small-sized sealing bag, when a
tape has a thickness of about 0.15 to 0.16 mm, a distance between
the faces of the tapes opposed to each other at the time of chuck
clamping is about 1.5 mm. On the other hand, when a total (W) of
the projection widths of the projected part 20 in directions on a
bag outer face side (W.sub.1) and a bag inner face side (W.sub.2)
is less than, for example, about 0.3 mm, holding properties of
fingers are deteriorated, and the parts do not function as means
for preventing the fingers from slipping.
[0087] To solve the problem, in the present embodiment, the
projected parts 20 are disposed opposite to each other in the
different positions of the bag body inner face, and are formed in
such a manner that the maximum width W of the projected parts which
project to the inner and outer sides of the bag body 1 is 0.3 mm or
more, 2.0 mm or less at maximum. The maximum width W is preferably
0.5 mm or more and 1.5 mm or less (not more than the distance
between the faces of the tapes opposed to each other).
[0088] In a position where the projected parts 20 opposed to each
other do not interfere with each other,
W.sub.1.apprxeq.W.sub.2.apprxeq.1.5 mm can be set. Assuming that
the thickness of the tape is 0.15 mm,
W.apprxeq.1.5+1.5+0.15.apprxeq.3.0 mm, and W can be set to be twice
the distance between the faces of the tapes opposed to each other
at maximum. Additionally, when W exceeds about 2.0 mm, the fingers
or hands are not easily inserted, and there is a possibility that
an unsealing property is impaired. To solve the problem, in the
present embodiment, since the respective projected parts 20 are
disposed in the different positions in the bag body 1, interference
is inhibited from being caused between the projected parts, and the
projected parts 20 can be formed to be large at maximum in a range
of the distance between the faces of the tapes opposed to each
other, in which the unsealing property is not impaired.
[0089] It is to be noted that in the present embodiment, the
maximum width W of each projected part 20 is set to 2.0 mm at
maximum, and preferably 1.5 mm or less in accordance with the
distance (about 1.5 mm) between the faces of the tapes opposed to
each other. Needless to say, this value can be appropriately
changed in accordance with the distance between the faces of the
tapes opposed to each other in the same manner as in the
above-described first embodiment. For example, when the distance
between the faces of the tapes opposed to each other exceeds 1.5
mm, the maximum width W of each projected part 20 can be set to 0.3
mm or more and to be not more than the distance between the faces
opposite to each other. In the present embodiment, the difference
between the positions of the projected parts 20a, 20b in the depth
direction of the bag body 1 is about 1 mm, but, needless to say,
this can be appropriately changed in accordance with sizes or
configurations of the projected parts 20, bag body 1, clamping
devices 12 and the like.
[0090] As described above, according to the sealing bag with the
chuck of the present embodiment, the projected parts 20 disposed
opposite to the inner faces of the bag body 1 are disposed in the
different positions in the depth direction of the bag. Therefore,
the oppositely projected parts do not interfere with each other in
a state in which the clamping devices 12 of the chuck 10 are
clamped, that is, the sealing bag is closed. Moreover, accordingly,
an outer shape of the projected part 20 according to the present
embodiment can be set to be an optimum size in a range of a
distance D between the faces of the tapes opposed to each other at
the time of the chuck clamping. The parts are easily held in the
fingers, the projected parts 20 having such sizes and shapes that
the fingers are easily inserted can be arbitrarily formed, and the
easy-to-unseal property of the sealing bag can further be
enhanced.
EXAMPLES
[0091] Examples of the sealing bag with the chuck according to the
present invention will be described hereinafter more concretely in
accordance with comparative examples. In the following example, the
sealing bag described above in each embodiment is manufactured
based on the following concrete conditions.
Example 1
[0092] (1) A chuck (tapes and clamping devices) was formed by
polypropylene.
[0093] (2) A projected part of a tape end part was formed into a
round sectional shape, and a diameter of a circular sectional shape
part of the projected part was set to 0.3 mm.
[0094] (3) The projected parts were formed in such a manner that
the parts were disposed in the same position on male and female
sides in accordance with the sealing bag described above in the
first embodiment.
[0095] (4) A bag body was formed using a film obtained by
laminating a biaxially stretched polypropylene film and a cast
polypropylene film.
[0096] (5) Tape parts excluding projected parts on tape end parts
are fused onto the film of the bag body, and the projected parts
are prevented from being fused onto the bag body.
Example 2
[0097] A projected part of a tape end part was formed into a
circular sectional shape, and a diameter thereof was set to 0.5 mm.
The others were similar to Example 1.
Example 3
[0098] A projected part of a tape end part was formed into a
circular sectional shape, and a diameter thereof was set to 0.7 mm.
The others were similar to Example 1.
Example 4
[0099] A projected part of a tape end part was formed into a
circular sectional shape, and a diameter thereof was set to 1.0 mm.
The others were similar to Example 1.
Example 5
[0100] A projected part of a tape end part was formed into a
circular sectional shape, and a diameter thereof was set to 1.5 mm.
The others were similar to Example 1.
Example 6
[0101] A projected part of a tape end part was formed into a
circular sectional shape, and a diameter thereof was set to 0.3 mm.
The position of the projected part on a male side was shifted by 1
mm from that on a female side in accordance with the sealing bag
described above in the second embodiment. The others were similar
to Example 1.
Example 7
[0102] A projected part of a tape end part was formed into a
circular sectional shape, and a diameter thereof was set to 1.0 mm.
The position of the projected part on a male side was shifted by 1
mm from that on a female side in accordance with the sealing bag
described above in the second embodiment. The others were similar
to Example 1.
Example 8
[0103] A projected part of a tape end part was formed into a
circular sectional shape, and a diameter thereof was set to 1.5 mm.
The position of the projected part on a male side was shifted by
1.5 mm from that on a female side in accordance with the sealing
bag described above in the second embodiment. The others were
similar to Example 1.
Example 9
[0104] A projected part of a tape end part was formed into a
circular sectional shape, and a diameter thereof was set to 2.0 mm.
The position of the projected part on a male side was shifted by
2.0 mm from that on a female side in accordance with the sealing
bag described above in the second embodiment. The others were
similar to Example 1.
Comparative Example 1
[0105] A projected part of a tape end part was formed into a
circular sectional shape, and a diameter thereof was set to 0.2 mm.
The others were similar to Example 1.
Comparative Example 2
[0106] A projected part of a tape end part was formed into a
circular sectional shape, and a diameter thereof was set to 2.0 mm.
The others were similar to Example 1.
Comparative Example 3
[0107] A projected part of a tape end part was formed into a
circular sectional shape, and a diameter thereof was set to 2.5 mm.
The position of the projected part on a male side was shifted by
2.5 mm from that on a female side. The others were similar to
Example 1.
Comparative Example 4
[0108] A chuck "P-560" (manufactured by Idemitsu Unitech Kabushiki
Kaisha) including a projected piece which projected only inside a
bag body was used as the chuck (tape with a clamping part). The
others were similar to Example 1.
Comparative Example 5
[0109] A chuck which did not include any projected part, projected
piece or the like at a tape end part was used. The others were
similar to Example 1.
[0110] Unsealing tests of sealing bags manufactured under
conditions of Examples 1 to 9 and Comparative Example 1 to 5
described above were performed, ease of grasping, and ease of
insertion of fingers were inspected, and generation of pinholes in
a bag body side face sealing part and deformation of a projected
part after the bag-making were inspected.
[0111] Inspection results are shown in Table 1 as follows.
1 TABLE 1 Position Diameter of pro- Unseal (mm) of jected feeling 2
Deforma- projected part on Unseal (ease of tion of part or male,
feeling 1 insertion projected projection female (ease of of part
after width side clamping) fingers) bag making Example 0.3 Same
.DELTA. .circleincircle. .circleincircle. 1 Example 0.5 Same
.largecircle. .largecircle. .circleincircle. 2 Example 0.7 Same
.largecircle. .largecircle. 2j 3 Example 1.0 Same .circleincircle.
.DELTA. .circleincircle. 4 Example 1.5 Same .circleincircle.
.DELTA. .circleincircle. 5 Example 0.3 vertical .DELTA.
.circleincircle. .circleincircle. 6 1 mm Example 1.0 vertical
.circleincircle. .circleincircle. .circleincircle. 7 1 mm Example
1.5 vertical .circleincircle. .circleincircle. .circleincircle. 8
1.5 mm Example 2.0 vertical .circleincircle. .DELTA.
.circleincircle. 9 2.0 mm Comp. 0.2 Same X .largecircle.
.circleincircle. Ex. 1 Comp. 2.0 Same .circleincircle. X
.circleincircle. Ex. 2 Comp. 2.5 vertical .circleincircle. X
.circleincircle. Ex. 3 2.5 mm Comp. 0.7 Same .DELTA. X .DELTA. Ex.
4 Comp. No -- X X -- Ex. 5 projection Symbols shown in Table 1
above have the following meaning. Unseal feeling 1
.circleincircle.: very easy to clamp, .largecircle.: easy to clamp,
.DELTA.: slightly difficult to clamp, X: difficult to clamp Unseal
feeling 2 .circleincircle.: fingers very easily inserted,
.largecircle.: easy to insert, .DELTA.: slightly difficult to
insert, X: difficult to insert Deformation of projected part after
bag making .circleincircle.: no deformation, .DELTA.: slight
deformation (falling)
[0112] As apparent from Table 1, the projected parts are disposed
in the same position on male-side and female-side tapes. In this
case, it was confirmed that, as described in Example 1, assuming
that the diameter of the projected part is 0.3 mm, ease of clamping
was slightly inferior, but ease of inserting the fingers were
satisfactory. Moreover, as described in Examples 2 and 3, it has
been confirmed that both ease of clamping and ease of inserting the
fingers are satisfactory, when the diameter of the projected part
is set to a range of 0.5 mm to 0.7 mm. As described in Examples 4
and 5, it has been confirmed that the ease of inserting the fingers
is slightly inferior, but the ease of clamping is very
satisfactory, when the diameter of the projected part is set to a
range of 1.0 mm to 1.5 mm. In this range, the ease of clamping is
not impaired because of a small diameter of the projected part as
in Comparative Example 1. It has also been confirmed that the ease
of inserting the fingers is not deteriorated because of the large
diameter of the projected part as in Comparative Example 2.
[0113] Moreover, as described in Examples 6 to 9, when the
positions of the projected parts are shifted by a range of 1 mm to
2.0 mm on the male and female sides, the diameter of the projected
part can be increased to 2.0 mm, and it has been confirmed that the
ease of clamping and the ease of inserting the fingers are further
enhanced. In this case, as described in Comparative Example 3, it
has been confirmed that the ease of clamping or the ease of
inserting the fingers is not impaired because of the excessively
large diameter of the projected part, or that the falling or the
deformation is not caused in the projected part at the time of the
bag-making.
[0114] It is to be noted that the sealing bag with the chuck of the
present invention is not limited to the above-described embodiments
only, and, needless to say, various modifications/embodiments are
possible in the scope of the present invention.
[0115] For example, in the above-described embodiments, as the
example of the sealing bag, the comparatively small-sized sealing
bag for containing any of the medical supplies, foods,
miscellaneous goods and the like has been described, but the
application or the object of the sealing bag is not limited to this
case. The present invention can be applied to the bag having any
application or function, as long as the sealing bag with the chuck
includes the chuck capable of sealing the bag in the bag body
formed of the synthetic resin. Therefore, the present invention can
be applied to not only the small-sized sealing bag but also various
types of chucked sealing bags such as a comparatively large-sized
sealing bag, a sealing bag including a check valve for nozzle
insertion, which deaerates or compresses the bag, and a sealing bag
provided with a chuck slider which is an opening/closing part of
the chuck.
INDUSTRIAL APPLICABILITY
[0116] As described above, according to a sealing bag with a chuck
according to the present invention, projected parts which
integrally project to both the inner and outer faces of a bag body
are disposed on tape end edge parts of the chuck, further the
projected parts are disposed inside the bag body without being
exposed from an opening part in the bag body or without being fused
on a bag side, and accordingly an easy-to-unseal property can be
securely enhanced without enlarging the chuck or the entire bag or
without fusing or flatting the projected part at the time of
bag-making. Accordingly, it is possible to realize a sealing bag
with a chuck, which is preferable especially for a small-sized
sealing bag for use in storing any of medical supplies, foods,
miscellaneous goods and the like.
* * * * *