U.S. patent application number 14/391039 was filed with the patent office on 2015-03-19 for delivery envelope-type bag.
The applicant listed for this patent is Keigo Shima. Invention is credited to Keigo Shima.
Application Number | 20150076217 14/391039 |
Document ID | / |
Family ID | 49623350 |
Filed Date | 2015-03-19 |
United States Patent
Application |
20150076217 |
Kind Code |
A1 |
Shima; Keigo |
March 19, 2015 |
DELIVERY ENVELOPE-TYPE BAG
Abstract
A delivery envelope-type bag, which is a bag manufactured from a
plastic sheet, or the like, is provided with a storage section for
storing the delivery item and a flap section formed from a sealing
section that seals the storage section and a peeling section
located between parallel perforations, and is configured so that
the flap section is folded back along a folding section and
adhesively fixed to the storage section by the sealing section. In
the delivery envelope-type bag: the parallel perforations and the
peeling section are formed to extend to both edges; and a variety
of notched sections and formed adjacent to or near the peeling
section at both edges of the flap section, and/or a variety cutout
sections are formed near the peeling section on the folding section
side at both edges of the flap section.
Inventors: |
Shima; Keigo; (Tokyo,
JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Shima; Keigo |
Tokyo |
|
JP |
|
|
Family ID: |
49623350 |
Appl. No.: |
14/391039 |
Filed: |
May 25, 2012 |
PCT Filed: |
May 25, 2012 |
PCT NO: |
PCT/JP2012/063451 |
371 Date: |
October 7, 2014 |
Current U.S.
Class: |
229/76 |
Current CPC
Class: |
B65D 27/34 20130101;
B65D 27/12 20130101 |
Class at
Publication: |
229/76 |
International
Class: |
B65D 27/12 20060101
B65D027/12 |
Claims
1. A delivery envelope-type bag, which is made from a plastic
sheet, a pulp sheet, or a composite sheet consisting of two or more
materials selected among plastic, pulp and metal, and comprises a
storage section that includes an opening portion and is used to
store a product for delivery, and a flap section that includes a
sealing section to close the storage section, parallel perforations
and a peeling section located between the perforations, and which
is provided by folding, along a fold, the flap section that is
contiguous to the storage section, and by securely adhering the
flap section to the storage section by using the sealing section,
comprising: the parallel perforations and the peeling section are
formed and extended across two edges of the flap section; and
notches are formed along the two edges of the flap section,
adjacent to, or near the peeling section, and/or cutout portions
are formed at the two edges of the flap section, near the peeling
section on the side of the fold.
2. The delivery envelope-type bag according to claim 1, wherein the
parallel perforations are alternately arranged, so that a hole of
the perforation on one side is located in the middle of two
adjacent holes of the perforation on the other side.
3. The delivery envelope-type bag according to claim 1, wherein
along the two edges of the flap section 1, the notches are formed
substantially in a quadrilateral shape where one side is open along
one of the edges of the flap section and the other side contacts
the peeling section, and the cutout portions are formed
substantially in an elongated rectangular shape with both ends in a
small circular shape, near the peeling section on the side of the
fold.
4. The delivery envelope-type bag according to claim 1, wherein
along the two edges of the flap section, the notches are formed
substantially in a quadrilateral shape where one side is open along
one of the edges of the flap section and the other side contacts
the peeling section, and the cutout portions are formed
substantially in an elongated rectangular shape with both ends in a
semi-circular shape, near the peeling section on the side of the
fold.
5. The delivery envelope-type bag according to claim 3, wherein for
the notches substantially in a quadrilateral shape, two corner
portions along either edge of the flap section and a corner portion
close to the fold are formed in a curved shape.
6. The delivery envelope-type bag according to claim 1, wherein
along the two edges of the flap section, the notches are formed,
near the peeling section and on both sides of the peeling section,
in a shape obtained by linking a circle to a side opposite to a
side, of an elongated rectangular shape, that is open along one of
the edges of the flap section.
7. The delivery envelope-type bag according to claim 1, wherein
along the two edges of the flap section, the notches in a
semi-circular shape where a side is open along one of the edges of
the flap section are formed, near the peeling section and on both
sides of the peeling section.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a U.S. National Stage Application of
International Application No. PCT/JP2012/063451 filed on May 25,
2012, and published in Japanese as WO 2013/175621 A1 on Nov. 28,
2013. The entire disclosure of the above application is
incorporated herein by reference.
TECHNICAL FIELD
[0002] The present invention relates to a delivery envelope-type
bag, and relates particularly to a delivery envelope-type bag, for
which a damage on a peeling section that might occur during a
delivery process can be prevented, and a recipient can easily tear
off the peeling section to open the bag. It should be noted that in
this invention, a "peeling section" represents a belt-like portion
that is defined by a plurality of perforations formed in parallel
at a predetermined gap, and is to be ripped off to open a bag, and
a "flap section" represents a portion that is contiguous to a
storage section (bag section) where a product for delivery is to be
stored, and that includes a sealing section, the parallel
perforations and the peeling section.
BACKGROUND ART
[0003] A delivery envelope-type bag (hereinafter, also referred to
simply as a bag) made of, for example, a plastic sheet, is
conventionally well known to be employed for packaging goods for
delivery. A manufacturing method for the bag and the structure of
the bag to be used for delivery will now be described according to
the prior art, while referring to FIGS. 7 and 8. The bag includes a
storage section 2 used to store a product for delivery and a flap
section 1, and as shown in the developed elevation view (FIG. 7A),
rectangular sheets are obtained by segmenting a single sheet blank,
and the bottom side of a bag section is formed by folding a sheet
S2 over a sheet S1 along a fold B2, while a bag section is formed
by fusing transverse sides WL1 and WL2 together, while opening a
distal end 21 where the two sheets overlap each other.
[0004] A sealing section 11 used to close the storage section,
parallel perforations 12a and 12b and a peeling section 13 located
between the perforations are included in a flap section 1 that is
contiguous to the sheet S1. Further, an adhesive material for
sealing is applied to the sealing section, and is covered with
release paper. A process beginning from storing of a product for
delivery and ending at closing of the bag will now be described. As
shown in FIGS. 8(A and B), when an item G for delivery is inserted
into the storage section through an opening section 21 that is
open, the flap section is folded along the fold B1 (FIG. 7B), and
is securely adhered to the storage section by using the sealing
section (FIG. 7C and FIG. 8), and the resultant bag is transported
or delivered to a recipient, who then rips off the peeling section
of the received bag along the perforations to obtain the item that
has been delivered.
[0005] During the transportation or delivery process for the bag of
prior art where a product for delivery is stored, small shocks
caused due to the handling or the collapse of a load generate the
inertial force on the product for delivery, which in turn
generates, through the peeling section, a tensile force between the
folded-over portion of the flap section and the sealing section. As
a result, especially for long-distance transportation, such as
international shipping, damage like tear (peeling damage) due to
rupture of perforations occurs at the flap section near both ends
of the peeling section, and accordingly, a problem, such as a
product being dirty, water-stained, or uncovered (exposed),
frequently occurs. Further, since the edges of the peeling section
are arranged on the face where the flap section is formed, and the
end portions of the peeling section are narrow, when recipient at a
delivery destination tries to open a bag that has been safely
received without the occurrence of the above described problem, he
or she is forced to perform less user-friendly manipulation
(peeling) in which the edge of the peeling section is pinched by
the tips of the fingers to rip off the peeling section.
[0006] Further, there are Patent Literatures Japanese Patent
Laid-Open No. 2005-138899, Japanese Patent Laid-Open No.
2001-247161, and Japanese Patent Laid-Open No. 2009-35323 as prior
art for the purpose of easily opening or tearing a packaging bag
formed of film. Japanese Patent Laid-Open No. 2005-138899 discloses
a food packaging bag for which a detour portion 6 is formed at an
appropriate location along perforations 5 to easily access the
opening portion; Japanese Patent Laid-Open No. 2001-247161
discloses a package member that includes a wide portion 20 where
the individual cuts 19 sequentially formed to provide a pair of
perforations 16 are extended outwardly in a direction X in which a
rip portion 15 is to be pulled; and Japanese Patent Laid-Open No.
2009-35323 discloses a packaging bag for which perforation rows 9
and 9 used for breaking are formed substantially in a chevron form
to make the bag easily open and hard to break.
[0007] A bag where notches or cutout portions are formed at the two
edges of a flap section are not conventionally proposed. Therefore,
there has been a demand on a bag wherein a simple process is
performed for the flap section to prevent a damage on the peeling
section during transportation, and to easily rip off the peeling
section for opening the bag.
SUMMARY OF INVENTION
Technical Problem
[0008] One objective of the present invention is to provide a
delivery envelope-type bag, for which the damage of a peeling
section during transit can be prevented, and a manipulation for
tearing off the peeling section can be easily performed to open the
bag that has been delivered at a destination.
Solution to Problem
[0009] The invention according to the first aspect of the current
disclosure is a delivery envelope-type bag, which is made from a
plastic sheet, a pulp sheet, or a composite sheet consisting of two
or more materials selected among plastic, pulp and metal, and
comprises a storage section 2 that includes an opening portion 21
and is used to store a product for delivery, and a flap section 1
that includes a sealing section 11 to close the storage section,
parallel perforations 12a and 12b and a peeling section 13 located
between the perforations, and which is provided by folding, along a
fold B1, the flap section that is contiguous to the storage
section, and by securely adhering the flap section to the storage
section by using the sealing section, characterized in that:
[0010] the parallel perforations and the peeling section are formed
and extended across two edges E1 and E2 of the flap section;
and
[0011] notches 14, 15 or 16 are formed at the two edges of the flap
section, adjacent to, or near the peeling section, and/or cutout
portions 17 or 18 are formed at the two edges of the flap section,
near the peeling section on the side of the fold.
[0012] The invention according to the second aspect of the current
disclosure is a delivery envelope-type bag, characterized in that,
as shown in FIG. 5, holes of the parallel perforations of the
delivery envelope-type bag according to the first aspect of the
current disclosure are alternately arranged, so that a hole L1 of
the perforation on one side is located in the middle of two
adjacent holes L2 and L3 of the perforation on the other side.
[0013] The invention according to the third aspect of the current
disclosure is a delivery envelope-type bag, characterized in that,
as shown in FIG. 1, along the two edges of the flap section 1 for
the delivery envelope-type bag according to the first aspect of the
current disclosure, the notches 14 are formed substantially in a
quadrilateral shape where one side is open along the edge E1 or E2
is open and the other side contacts the peeling section 13, and the
cutout portions 17 are formed substantially in an elongated
rectangular shape with both ends in a small circular shape, near
the peeling section on the side of the fold B1. It should be noted
that both the notches 14 and the cutout portions 17, or either the
notches 14 or the cutout portions 17, may be formed along only one
of the edges of the flap section, or the notches 14 may be formed
on both sides of the peeling section 13.
[0014] The invention according to the fourth aspect of the current
disclosure is a delivery envelope-type bag, characterized in that,
as shown in FIG. 2, along the two edges of the flap section 1 for
the delivery envelope-type bag according to the first aspect of the
current disclosure, the notches 14 are formed substantially in a
quadrilateral shape where one side is open along the edge E1 or E2
is open and the other side contacts the peeling section 13, and the
cutout portions 18 are formed substantially in an elongated
rectangular shape with both ends in a semi-circular shape, near the
peeling section on the side of the fold B1.
[0015] The invention according to the fifth aspect of the current
disclosure is a delivery envelope-type bag, characterized in that,
as shown in FIGS. 1 and 2, for each of the notches 14 substantially
in a quadrilateral shape of the delivery envelope-type bag
according to the third aspect of the current disclosure, two corner
portions C1 and C2 along the edge E1 or E2 of the flap section and
a corner portion C3 close to the fold B1 are formed in a curved
shape.
[0016] The invention according to the sixth aspect of the current
disclosure is a delivery envelope-type bag, characterized in that,
as shown in FIG. 3, along the two edges of the flap section 1 of
the delivery envelope-type bag according to the first aspect of the
current disclosure, the notches 15 are formed, near the peeling
section 13 on both sides of the peeling section, in a shape
obtained by linking a circle to a side opposite to a side, of an
elongated rectangular shape, that is open along the edge E1 or E2
of the flap section.
[0017] The invention according to the seventh aspect of the current
disclosure is a delivery envelope-type bag, characterized in that,
as shown in FIG. 4, along the two edges of the flap section 1 of
the delivery envelope-type bag according to the first aspect of the
current disclosure, the notches 16 in a semi-circular shape where a
side is open along the edge E1 or E2 of the flap section are
formed, near the peeling section 13 and on both sides of the
peeling section. It should be noted that the notches 15 and 16 of
the inventions according to the sixth and seventh aspects of the
current disclosure may be formed along only one of the edges of the
flap section, and the cutout portions 17 and 18 may be formed near
these notches and on the side of the fold B1.
Advantageous Effects of Invention
[0018] According to the present invention, the parallel
perforations and the peeling section are extended across the two
edges of the peeling section or the flap section, and notches and
cutout portions in various shapes and a portion where the notches
and cutout portions are appropriately arranged are provided along
the two edges of the flap section adjacent to, or in the periphery
of the peeling section. Even when handling or collapse of a load
has occurred during the shipping or delivery of a bag that holds an
item for delivery, and the inertial force of the stored product
generates a sudden tensile force, which is in turn exerted to the
folded-over portion of the flap section and the sealing section,
the tensile force is dispersed by the notches and the cutout
portions in various shapes, and concentration of the tensile force
on the both edges of the peeling section is avoided. Owing to the
notches and the cutout portions, the direct application of the
tensile force to the two edges of the peeling section can be
blocked, and the damage of the flap section in transit can be
appropriately avoided. Since the three corners of each notch are
formed in a curved shape (R curve), upon application of the tensile
force, the R-curve corner tends to be rolled up and absorb the
tensile force, and therefore, the damage of the edges of the
peeling section can be prevented.
[0019] According to this invention, the parallel perforations are
alternately formed by locating the holes consisting of the
perforation on one side between the adjacent holes of the
perforation on the other side. Therefore, the perforations are not
easily broken, and the damage of the flap section can be more
appropriately prevented.
[0020] Further, according to the present invention, the notches in
various shapes where the side is open along one of the edges of the
flap section is open are formed along both of, or one of the edges
of the flap section, on one side or both sides of the peeling
section. With this structure, since the rip portion is partially
exposed from the sheet face, pinching manipulation is easily
performed to strip off the peeling section to open the bag that has
been delivered at the destination, and the usability for opening
the bag is greatly improved. Furthermore, the bag according to the
present invention can be produced only by performing the simple
processing with a small amount of materials.
BRIEF DESCRIPTION OF DRAWINGS
[0021] FIG. 1 A partially enlarged plan view of an example
structure of a first embodiment for a delivery envelope-type bag
according to the present invention.
[0022] FIG. 2 A partially enlarged plan view of an example
structure of a second embodiment for the delivery envelope-type bag
according to the present invention.
[0023] FIG. 3 A partially enlarged plan view of an example
structure of a third embodiment for the delivery envelope-type bag
according to the present invention.
[0024] FIG. 4 A partially enlarged plan view of an example
structure of a fourth embodiment for the delivery envelope-type bag
according to the present invention.
[0025] FIG. 5 A partially enlarged plan view of an example
arrangement for the perforations of the delivery envelope-type bag
according to the present invention.
[0026] FIG. 6 A diagram for explaining the function and effects of
the delivery envelope-type bag according to the present
invention.
[0027] FIG. 7 A diagram for explaining a delivery envelope-type bag
according to prior art, with (A) being a developed elevation view,
(B) being a perspective view of a state wherein a flap section is
folded over, and (C) being a perspective view of a state wherein
the flap section is securely adhered by a sealing section.
[0028] FIG. 8 A diagram for explaining the delivery envelope-type
bag according to prior art, with (A) being a partially enlarged
diagram for FIG. 7(C), and (B) being an enlarged cross-sectional
view taken along line X-X in FIG. 7(A).
DESCRIPTION OF EMBODIMENTS
[0029] The embodiments of a delivery envelope-type bag according to
the present invention will now be described in detail, while
referring to the accompanying drawings. A delivery envelope-type
bag according to this invention (hereinafter, also referred to
simply as a "bag") is a bag, as shown in FIGS. 1 to 5, that is
produced by using either a plastic sheet, a pulp sheet, a metal
sheet, or a composite sheet of these materials, and that includes a
storage section (bag section) 2 and a flap section 1. The storage
section 2 is a bag portion, used to store a product for delivery,
for which two lateral sides WL1 and WL2 of a sheet that is obtained
by segmenting a sheet blank formed of a single sheet, or formed by
laminating a plurality of sheets, are fused together, and for the
portion that serves as the bottom side of the bag section, sheets
S1 and S2 are folded along a fold B2, and the end portion where the
two sheets overlap each other is opened to provide an opening
section 21. In FIGS. 1 to 5, wavy lines indicate that the
longitudinal portion and the lateral portion of the bag are
partially omitted.
[0030] The flap section 1 is contiguous to the sheet S1, and
includes a sealing section 11 used to securely adhere the flap
section 1 to one part of the storage section, parallel perforations
12a and 12b, and a peeling section 13 located between the
perforations (see FIG. 8). A sealing adhesive agent is applied to
the sealing section, and is covered with release paper. The most
appropriate material for the bag of this invention is, for example,
a plastic sheet, a pulp sheet, a metal sheet, or a composite sheet
of these materials, and a single layer consisting of one of these
sheets, or multiple layers formed by laminating two or more of
these sheets, can be employed as a material for the bag. This is
because translucency, airtightness and storage stability should be
taken into account in accordance with, for example, the property
and the weight of the product to be delivered. An arbitrary
material can be employed for the bag of this invention so long as
the bag can be torn along perforations, etc.
[0031] When a product to be delivered is inserted through the
opening section 21 into the bag section having the above described
structure, the flap section 1 is folded along the fold B1 that is
located at the rear of the opening section 21 at the distal end of
the sheet, and is securely adhered to the sheet S2 of the storage
section 2 by employing the sealing section 11, so that the delivery
envelope-type bag is obtained. Since the structure for the bag and
the manufacturing procedures, such as folding, fusing and securely
adhering, for this invention are substantially the same as those
for the prior art explained while referring to FIGS. 7 and 8, only
the structure of the characteristic portion of this invention will
be described.
[0032] For a bag according to a first embodiment of the present
invention, as shown in FIG. 1, notches 14 substantially in a
quadrilateral shape are formed along the two edges (the upper edge
and the lower edge in the diagram) of the flap section 1 by
opening, with a predetermined width, the side along the edge E1 or
E2 of the flap section, and by maintaining the other side in
contact with the peeling section 13 with a predetermined width. In
this embodiment, two corners C1 and C2 of the notch at each edge of
the flap section and a corner C3 along the inner side and close to
the fold B1 are formed with an R-curve shape. Since the three
corners C1, C2 and C2 of the notch are curved, the tensile force
that act to the bag can be easily absorbed by the curved corners.
Further, two cutout portions 17 are formed, at the respective edges
of the flap section 1, near the peeling section 13 on the side of
the fold B1, and have substantially an elongated rectangular shape
with a small circles at both ends.
[0033] For a bag according to a second embodiment of the present
invention, as shown in FIG. 2, two notches 14 are formed on the
respective edges of a flap section 1 in the same manner as in the
first embodiment, and cutout portions 18 are formed, substantially
in an elongated rectangular shape with both ends in a semi-circular
shape, near a peeling section 13 on the side of a fold B1. It
should be noted that reference numerals to denote portions
corresponding to those in FIG. 1 are not shown in FIG. 2.
[0034] Referring to FIGS. 1 and 2, the notches 14 and the cutout
portions 17 and 18 are formed at two locations along the respective
edges of the flap section; however, according to the invention, the
notches and the cutout portions may be formed along one of the
edges of the flap section, and only the notches may be formed along
both of, or one of the edges of the flap section, while the cutout
portions may be formed on both sides of the peeling section 13.
[0035] For a bag according to a third embodiment of the present
invention, as shown in FIG. 3, two notches 15 are formed along each
of the edges of a flap section 1, with a peeling section 13 in
between. The notches 15 have an elongated rectangular shape where
the side along the edge E1 or E2 of the flap section is open, and a
circle is connected to the opposite side. It should be noted that
reference numerals to denote the portions corresponding to those in
FIG. 1 are not shown in FIG. 3.
[0036] For a bag according to a fourth embodiment of the present
invention, as shown in FIG. 4, two notches 16 are formed along each
of the edges of a flap section 1, with a peeling section 13 in
between. The notches 16 have a semi-circular shape where the side
along the edge E1 or E2 of the flap section is open. It should be
noted that reference numerals to denote the portions corresponding
to those in FIG. 1 are not shown in FIG. 4.
[0037] Referring to FIGS. 3 and 4, the notches 15 and 16 are formed
at two locations along each of the edges of the flap section with
the peeling section in between; however, according to the
invention, the notches on both sides of the peeling section, or on
one side of the peeling section, may be formed along only one edge
of the flap section, and the cutout portions 17 or 18 according to
the first or second embodiment may also be formed near the notches
on the side of the fold B1.
[0038] As for the arrangement of the parallel perforations provided
for the bags according to the first to the fourth embodiments of
this invention, the perforations are alternately formed so that the
hole L1 for the perforation on one side is located in the middle of
the two adjacent holes L2 and L3 for the perforation on the other
side. Since the holes consisting of the perforations are
alternately formed, the perforations are not easily broken, and the
damage of the peeling section can be more appropriately
prevented.
[0039] Next, while referring to FIG. 6, an explanation will be
given for how the notches and the cutout portions of the bag of
this invention act on the tensile force, and what kind of effect is
obtained. In FIG. 6, the lateral portion of the bag is partially
omitted, and is indicated by a wavy line. The structure shown in
FIG. 6 is that for the bag in FIG. 1 for the first embodiment, and
represents the state wherein an item to be delivered is stored in
the bag, and the flap section 1 is folded along the fold B1, and is
securely adhered to the portion of the storage section 2 by the
sealing section 11. Arrows a, b and c in this diagram indicate
three typical directions of action of the tensile force that is
regarded as a problem in transit, and that occurs due to the
inertial force of the delivery item stored in the storage section
and the gravity. In the diagram, a case wherein the arrows a, b and
c are directed only toward the lower edge is shown; however, there
is also a case wherein the tensile force acts on the upper edge in
the diagram.
[0040] The present inventor conducted an experiment to examine how
the three tensile forces a, b and c, which were exerted to the flap
fold (folded-over portion) B1 and the sealing section 11, acted on
a peeling end X of the flap section that tends to be damaged at
first, and found that the tensile forces b and c are were blocked
by the cutout portions 17 and the notches 14, and did not act on
the peeling end X. Therefore, the damage of the peeling section can
be prevented. On the other hand, there is a case wherein the
tensile force a is not appropriately blocked by the cutout portions
17 and the notches 14, and may cause a damage on the peeling end X.
Since the point of application of the tensile force to the flap
fold and the magnitude of the tensile force are determined in
accordance with the weight and the form of a product to be stored
in the bag, the weight, the form, etc., of an item to be stored
should be taken into account to properly determine, for example,
the sizes and the shapes of the cutout portions and the notches and
the locations where these portions are formed.
[0041] Furthermore, when a double-sided adhesive tape with release
paper was applied as an adhesive material to the sealing margin of
the sealing section 11, and when the sealing section was adhered
and fixed to the folded-over portion of the flap section, the
tensile force was generated in a portion Y between the sealing
section 11 and the peeling section 13 when the release paper was
peeled. However, break or tear of the peeling end X did not occur
due to the tensile force generated at the intermediate portion Y.
It is assumed that this is because of the function of the notches
in the invention. As described above, the notches of this invention
can suppress the occurrence of tear at the peeling end when the
flap section is securely adhered to one part of the storage section
by the sealing section to form the delivery envelope-type bag.
[0042] The shape of the cutout portion is not limited to the shape
described in each of the embodiments, and the two ends of the
cutout portion may be formed in a rhombic shape, a trapezoid shape,
or a star shape, and further, the belt-like portion may also be
formed in various shapes, such as a rhombic shape or an elliptic
shape. The shape of the notch is not limited to the shape described
in each of the embodiments, and various shapes, such as a
triangular shape, a trapezoid shape, a fan shape or a rhombic
shape, may also be employed. In the cutout portion and notch
forming process, the cutout portions and the notches need not be
completely cut out along the shapes from the sheet material of the
flap section, and the cutout portions and the notches may also be
attached, or connected, partially (at the end), to the sheet
material serving as the flap section. With this structure, a labor
of disposing of the waste sheet material after the cutout portions
and the notches have been formed is not required, and the waste
disposal processing can be simplified. The above described
embodiments are very limited examples for the processing, and so
long as a formation and a structure are easily obtained based on
the idea of the present invention, it is obvious that the formation
and the structure are included in the scope of the idea of this
invention, regardless of the processed sections that include
notches, cutout portions, cuts, etc., in various shapes other than
those illustrated, and the structure provided by employing these
processed sections.
[0043] As described above while referring to FIGS. 7 and 8, for the
bag according to the prior art, the notches, the cutout portions,
etc., are not formed near the peeling section, and any other
processing is not performed. Whereas, according to the present
invention, as described above, the notches and the cutout portions
in various shapes are formed along the edges of the flap section
and in contact with, or near the peeling section. The tensile force
generated by the inertial force of the item stored is dispersed by
the notches and the cutout portions, and therefore, concentration
of the tensile force on both ends of the peeling section can be
avoided.
INDUSTRIAL APPLICABILITY
[0044] According to the delivery envelope-type bag of the present
invention, the notches are formed along the edges of the flap
section, in contact with, or adjacent to the peeling section, and
the cutout portions are formed near the peeling section on the side
of the folded-over portion. Owing to the notches and the cutout
portions, the tensile force generated between the folded-over
portion of the flap section and the sealing section is not
collectively applied to the peeling end, and therefore, the damage
of the peeling section can be prevented. The delivery envelope-type
bag of this invention is an ideal bag used for home delivery or
commercial delivery of books, magazines and brochures having
comparatively large specific weights, and can also be employed for
delivery of the other products, and a broad range of use for the
bag is anticipated.
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