U.S. patent number 3,616,114 [Application Number 04/713,347] was granted by the patent office on 1971-10-26 for reusable composite adhesive sealing tapes.
This patent grant is currently assigned to Daiei Shikogyo Kabushiki Kaisha, Sekisui Kagaku Kogyo Kabushiki Kaisha, Tanaka-ya Shojii Kabushiki Kaisha. Invention is credited to Tsuneji Hamaguchi, Hajimu Tanaka.
United States Patent |
3,616,114 |
Hamaguchi , et al. |
October 26, 1971 |
**Please see images for:
( Certificate of Correction ) ** |
REUSABLE COMPOSITE ADHESIVE SEALING TAPES
Abstract
Reusable, composite, adhesive sealing tapes for releasably
interconnecting container parts and the like, such as corrugated
boxes, paper bags, etc. The tapes, cut to a suitable length and
width, include at least two tape portions or laminations, namely a
main tape portion and a partly coplanar reinforcing tape portion;
optionally, an auxiliary tape portion may also be provided. The
inner end of the reinforcing portion is firmly attached to the
midportion of the main portion. The latter has a first area adapted
to be attached to one side of a first container part, while a
second area thereof, including its free end, is adapted to be
attached to a second container part which should be releasably
interconnected with said first container part; the reinforcing
portion is at least partly attachable to the opposite side of the
first container part. A turned-up section formed from the inner end
of the reinforcing portion may constitute a hinge for said first
area of the main portion when it is attached to the respective
container part.
Inventors: |
Hamaguchi; Tsuneji (Osaka,
JA), Tanaka; Hajimu (Suita-City, JA) |
Assignee: |
Daiei Shikogyo Kabushiki Kaisha
(Hirakata City, JA)
Tanaka-ya Shojii Kabushiki Kaisha (Osaka, JA)
Sekisui Kagaku Kogyo Kabushiki Kaisha (Osaka,
JA)
|
Family
ID: |
12059707 |
Appl.
No.: |
04/713,347 |
Filed: |
March 15, 1968 |
Foreign Application Priority Data
|
|
|
|
|
Mar 15, 1967 [JA] |
|
|
42/21607 |
|
Current U.S.
Class: |
428/42.2;
229/198.1; 428/352 |
Current CPC
Class: |
B65D
5/0236 (20130101); A61F 13/58 (20130101); C09J
7/20 (20180101); Y10T 428/2839 (20150115); Y02W
30/80 (20150501); Y02W 30/807 (20150501); Y10T
428/149 (20150115) |
Current International
Class: |
A61F
13/58 (20060101); A61F 13/56 (20060101); B65D
5/02 (20060101); C09J 7/02 (20060101); B32b
003/04 () |
Field of
Search: |
;229/49,45,51ST
;161/38-39,145,149,406,102,99-100,167 ;117/68.5,122P,122PA
;206/59C |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Dier; Philip
Claims
What we claim is:
1. A reusable composite sealing tape for releasably interconnecting
container parts comprising a main tape portion cut to a suitable
length and width, and an at least partly coplanar reinforcing tape
portion, the undersurfaces of said tape portions being coated with
a pressure-sensitive adhesive, said tape portions having
substantially aligned free ends, the inner end of said reinforcing
portion being turned up so that the undersurfaces of said main and
said reinforcing portions at least partly face each other, thereby
the turned-up reinforcing end portion being firmly attached to the
undersurface of the midportion of said main tape portion, the
latter having a first area adapted to be attached to one side of a
first container part, while a second area of said main portion,
including its free end, is adapted to be attached to a second
container part which should be releasably interconnected with the
first container part, by the application of manual pressure to said
first and said second areas when placed on the respective first and
second container parts, said reinforcing portion being at least
partly attachable to the opposite side of the first container part
by similar pressure applied therebetween.
2. The sealing tape as defined in claim 1, wherein said main
portion has a mark applied to its top surface, in the area of said
midportion to which said inner end of the reinforcing portion is
attached, for indicating a third area of said main portion which is
to be located edgewise between said one and said opposite sides of
the first container part when the sealing tape is applied
thereto.
3. The sealing tape as defined in claim 1, further comprising a
picking tab at said free end of the main portion, for facilitating
the separation of said main and said reinforcing portions.
4. The sealing tape as defined in claim 3, wherein said picking tab
is constituted by a turned-in terminal portion of said free end of
the main portion.
5. The sealing tape as defined in claim 1, wherein said
undersurfaces of the main and reinforcing portions face each other
at said midportion, said turned-up reinforcing portion and an
adjoining section of said reinforcing portion constituting hinge
means for said first area of the main portion when the same is
attached to the first container part.
6. The sealing tape as defined in claim 5, further comprising an
auxiliary tape portion, at least partly coplanar with said main and
said reinforcing portions, and applied below said reinforcing
portion.
7. The sealing tape as defined in claim 6, further comprising at
least one length of backing material initially and at least partly
attached to the respective exposed undersurfaces of said tape
portions.
8. The sealing tape as defined in claim 5, further comprising an
auxiliary tape portion, at least partly coplanar with said main and
said reinforcing portions, and inserted therebetween.
9. The sealing tape as defined in claim 8, wherein the inner end of
said auxiliary portion is inserted into the space formed by said
turned-up reinforcing end portion.
10. The sealing tape as defined in claim 8, wherein the free end of
said reinforcing portion projects beyond the free end of said
auxiliary portion.
11. The sealing tape as defined in claim 8, wherein the inner end
of said auxiliary portion is spaced apart from said turned-up
reinforcing portion along said midportion of the main end portion.
Description
The invention relates to reusable composite sealing tapes (which
can also be termed sets of tapes) used for sealing, for example,
the mouth of a box, a bag or other container, made of cardboard,
paper or some other suitable material.
The inventive sealing tapes are especially useful for releasably
interconnecting cover flaps of boxes or the like, made of
relatively thick cardboard, such as corrugated board, having a
relatively high stacking or compressive strength.
The inventive sealing tapes have superior characteristics such as
low price, easy manufacture and handling when fitting the same to
the mouth of a box or a bag, and the facility of repeated use
without any fear of injuring or harming the box or the bag to which
it was attached. The use of adhesive tapes for sealing the mouth of
a box or a bag is well known. The conventional methods, however,
are relatively primitive, such as when a single strip of adhesive
tape, cut to the required length, is directly attached to the
mouth, e.g. by means of an adhesive. The tape may tear the surface
of the box where it is glued on, particularly when the tape is
peeled away or removed for unpacking. Another major disadvantage
resides in that a tape, once it has been used, cannot be used any
more for resealing; quite frequently the box or bag itself cannot
be reused either. Consequently the use of conventional adhesive
tapes is restricted to cases where a box or a bag, and also the
tape proper, might not be expected to be reused.
The sealing by means of adhesive tapes is, however, capable to be
put to better use for simpler and faster sealing, in comparison
with other sealing means. Those skilled in the art have therefore
sought for a long time the development of a new reusable adhesive
sealing tape.
One of the major objects of this invention is to provide a reusable
adhesive sealing tape which avoids the above-mentioned drawbacks
and fulfills the explained demands.
Another object is to provide composite sealing tapes which are easy
to manufacture, store and apply, over and over again, for boxes and
the like containers.
It is yet another object to provide sealing tapes of the kind
described which consist of a minimum number of portions, for
example, only two tape portions which together constitute the
composite tape or set of tapes.
This invention relates to composite sealing tapes including a main
and a reinforcing tape portion, one end of the latter being firmly
attached to the midportion of the undersurface of the former;
moreover, the former is placed above the latter in such a way as
said undersurface is in coplanar contact with the top surface of
the latter.
In the inventive sealing tapes, materials such as cloth, kraft
paper, cellophane paper, plastic sheets, plastic laminates, etc.
can be used for the tape portions as well as for backing, if
provided, the undersurface thereof being entirely or partly coated
with a conventional pressure-sensitive adhesive. The surfaces of
the tape portions may also be treated with conventional releasing
agents to an extent which will permit sufficient adhesion to the
adhesive-coated undersurfaces of the adjoining respective tape
portions, when compressed, but do not cause any dislocation of the
adhesive layers or films on the undersurfaces when one tape portion
is separated or peeled off from another.
Moreover, some conventional primer coating may be applied between
the tape portions and adhesive layers in order to obtain a stronger
adhesion, as is well known in this particular field of
invention.
Any conventional pressure-sensitive adhesive and/or compatible
releasing agent may be used for the sealing tapes of the present
invention, such as have been disclosed in various earlier
publications, for example: U.S. Pats. 2,236,567 of Apr. 1, 1941 to
Richard G. Drew, titled "Adhesive Sheeting"; 2,319.959 of May 25,
1943 to Hubert J. Tierney, "Adhesive"; 2,532,011 of Nov. 28, 1950
to Carl A. Dahlquist et al., "Liners and Adhesive Tapes...";
2,697,084 of Dec. 14, 1954 to Laszlo W. Eger, "Adhesives...";
2,822,290 of Feb. 4, 1958 to Charles S. Webber, "Release
Coatings..."; 2,880,862 of Apr. 7, 1959 to John T. Sermattel,
"Chemical Process and Product"; and primarily U.S. Pats. 2,971,863
of Feb. 14, 1961 to Harold V. Kindseth et al., "Pressure Sensitive
Tape" and 2,987,420 of June 6, 1961 to Cyrus W. Bemmels et al.,
"Pressure Sensitive Adhesive Composition...," as well as German
Pat. No. 855,746 of Nov. 17, 1952 to Kurt Fendius (Assignee P.
Beierdorf & Co. A. G., Hamburg), relative to an adhesive
sealing tape.
Optionally, the invention contemplates a set of three rather than
two tape portions, including a main tape portion, one half of which
holds and clamps adhesively the cover flap or other part of the
mouth of a box or a bag, in cooperation with a reinforcing tape
portion, as explained before, the opposite half thereof extending
to the other cover flap of the box or bag mouth, and having a free
adhesive undersurface which may be stuck or otherwise attached to
the other cover flap. This embodiment includes an auxiliary
adhesive tape portion which is attached with adhesive to the
surface of said other cover flap at the location where the free
adhesive undersurface of the main tape portion will abut.
The auxiliary tape portion can, however, be omitted when the other
or opposite cover flap, which may match with the free adhesive
undersurface of the main tape portion, has previously been treated
with releasing agents or covered with cellophane paper, vinyl tape
or some other suitable material in lieu of the aforementioned
auxiliary tape portion.
For all practical purposes, the present invention can be embodied
as a set of only two tape portions or laminated strips, as
explained before, including the main and the reinforcing tape
portions, to full satisfaction for repeated use, without detriment
to either tape or container (box, bag or the like).
It is to be understood that in practicing the invention there can
be used various widths, lengths and materials for the tape
portions, to be selected in accordance with the material, the size
and other characteristics of the box, bag or the like container for
which the sealing tape should be used.
According to further features of the inventive sealing tapes, a
mark may be applied to the top surface of the main tape portion,
for identifying an area which is to be located edgewise on the
first-mentioned cover flap of the box or bag when the sealing tape
is applied thereto.
For storage and transportation, the inventive sealing tapes may be
provided with a suitable backing material for covering the
respective exposed undersurfaces of the tape portions. Optionally,
a picking tab may be provided at the free end of the main tape
portion, constituted either by a turned-in terminal portion of said
tape portion or by a separate piece of material secured to the
undersurface of the main-tape free end.
Other objects and many of the attendant advantages of the invention
will be readily appreciated as the same becomes better understood
by reference to the following detailed description, when considered
with the accompanying drawings, wherein
FIG. 1 is a somewhat schematic, perspective illustration of a
first, exemplary embodiment of a reusable composite sealing tape
according to the present invention, including only two tape
portions;
FIG. 2 is a similar illustration of a second embodiment according
to the invention wherein the sealing tape has three tape
portions;
FIG. 3 shows a third embodiment of the inventive sealing tape;
FIG. 4 illustrates a fourth embodiment; and
FIGS. 4A to 4D illustrate consecutive procedural steps, in vertical
sectional views, for applying the fourth exemplary sealing-tape
embodiment as shown in FIG. 4 to cover flaps of a container.
FIG. 1 shows the simplest embodiment of the inventive reusable
composite sealing tape, including a top or main tape portion
generally designated 1 and including terminal areas 1a and 1b, the
latter being termed the free end of the tape portion 1, as well as
a bottom or reinforcing tape portion 2. The inner end of the tape
portion 2 is turned up as shown at 2a so that the undersurfaces of
the two tape portions 1 and 2 touch each other. These undersurfaces
are preferably given a coat or layer of a conventional
pressure-sensitive adhesive as indicated by the stippling on the
surfaces marked with numeral 4. Examples of suitable materials were
described in the patents enumerated earlier in the
specification.
A mark of line 1d may be applied to the top surface of the tape
portion 1, generally in its midportion above the turned-up section
2a, for purposes to be explained later in more detail. A picking
tab 6 may be provided, in the form of a small piece of thin but
strong material, attached or glued to the undersurface of portion 1
so as to project beyond its free end, for facilitating the
separation of the main tape portion 1b from the layer below. As an
example, a single backing tape 8 is shown which covers the
undersurfaces of both tape portions 1 and 2 before the sealing tape
is put to use.
The turned-up section 2a is preferably inseparably or at least
firmly attached to the undersurface of portion 1, also to be
explained later in full. It will be understood that the tape
portions 1, 2 can be made longer or shorter; the free end of
portion 2 should preferably project beyond the free end of portion
1b or its picking tab 6, if provided. The width of the tape
portions can be adapted to the particular sealing job to be
accomplished; evidently a wider sealing tape will have a stronger
adhesion to the cover flaps of the container parts to which it is
temporarily or permanently attached.
FIG. 2 shows a second embodiment of the sealing tape wherein an
auxiliary tape portion 3 is disposed below the reinforcing tape
portion 2. Preferably the inner end of portion 3 is shorter so as
not to interfere with the turned-up section 2a of the tape portion
above. In other respects this embodiment is much like the
previously described simplest embodiment.
FIG. 3 shows another sealing-tape embodiment with three laminations
or tape portions wherein the inner end of the auxiliary tape
portion 3 is inserted in the space 2a' formed between the parallel
areas of the turned-up section 2a. The sequence of the tape
portions in this modified embodiment is 1-3-2 (-8) when going from
top to bottom whereas, it will be understood, the preceding FIG. 2
displayed a sequence of 1-2-3 (-8). FIG. 3 shows an alternative
picking-tab solution in that the free end 1b is turned back so as
to form a tab 1c which performs substantially as the tab 6 shown in
the other figures. It is to be understood of course that these
expedients are interchangeable, and either can be used in any of
the illustrated exemplary sealing-tape embodiments.
FIG. 4 illustrates a modification wherein the inner end of tape
portion 3 is spaced apart from the turned-up section 2a so as to
provide a small gap, substantially below the mark or line 1d, again
as will be explained later in more detail. Preferably the free end
of the reinforcing tape portion 2 projects beyond the free end of
the auxiliary tape portion 3, as shown in FIGS. 3 and 4.
In all four illustrated exemplary embodiments, the undersurfaces of
the tape portions 1, 2 and 3 are coated with the pressure-sensitive
adhesive as the respective layers 4. Preferably, the reusable
composite sealing tapes according to the invention are so
constructed as to prevent mutual sticking of the adhesive layers of
the respective tape portions when in use for sealing the mouth of a
box or a bag except that the turned-up section 2a is firmly
attached, as mentioned before, to the undersurface of the portion
1. This makes for almost perfect fixing and integration of the
components in the composite sealing tape.
The inner end of the portion 2, with its turned-up section 2a, is
located in the vicinity of the midportion of the undersurface of
the main portion 1, and it actually divides the latter into two
areas, substantially coinciding with the terminal areas designated
1a and 1b. Area 1a can be attached to the upper surface of a box or
bag, while area 1b is releasably attachable to a cover flap or
other part of the box or bag, as will be explained with reference
to FIGS. 4A through 4D.
It is the purpose of the auxiliary tape portion 3 to provide a
protection against tearing off the surface of the box or bag due to
the adhering force of the main tape portion 1 in cases when the
mouth is opened by peeling off the free portion 1b of the main
portion 1. It should be noted in this connection that the length of
the free or terminal area or portion 1b has an effective adhesion
length in order to fulfill its purpose. It will be understood that
the free end of the reinforcing tape portion 2 is made to project
beyond that of the auxiliary tape portion 3, as shown in FIGS. 3
and 4.
Each of the tape portions 1, 2 and 3 is made of a material or
backing such as cloth, kraft paper, cellophane, plastic sheets, or
other suitable materials, or laminates thereof, to which the
adhesive layers 4 are applied. For the reinforcing tape portion 2,
kraft paper is more effective because it is not easily deformed,
and also from the standpoint that the portion 2 has to keep the
attached area 1a of the main tape portion 1 in good adhesive
contact with the cover flap of the box, by the aid of the section
2a when the main portion 1 is peeled off or separated with its
terminal portion 1b.
Any of the tape portions 1, 2 and 3 may have its top surface,
opposite the undersurface which has the adhesive layer 4 thereon,
treated with a suitable releasing agent. This treatment has to be
done in such a way that the top surface maintains satisfactory
adhesion with the adjoining adhesive layer when the same is pushed
against it but is releasable therefrom without dislocating the
same, if necessary.
In the exemplary embodiments shown in FIGS. 3 and 4, if the force
necessary for peeling off the main tape portion 1 from the
auxiliary tape portion 3 is determined to be greater than that
necessary for peeling off the auxiliary portion from the
reinforcing tape portion 2, this is very favorable because the main
and the auxiliary portions can be peeled off together from the
reinforcing portion after the composite tape has been attached to
one of the cover flaps of the box or bag.
It has been mentioned before that a backing tape or material 8 may
be temporarily attached for protecting the adhesive layers 4. It
should be understood that when the composite tapes according to the
invention are stored or supplied for ultimate use, in the form a
bundle or a set, including a plurality of superimposed composite
tapes, it will be sufficient that only the lowermost tape portion
of the very lowest composite tape be provided with the backing
material. The individual sealing-tape units can easily be taken
apart without sheets of backing material inserted therebetween,
particularly if the aforedescribed releasing agent is applied to
the top surfaces of the tape portions, especially to that of the
main tape portion.
In the following, consecutive procedural steps will be described
with reference to FIGS. 4A, 4B, 4C and 4D, showing how the
exemplary fourth sealing-tape embodiment of FIG. 4 is applied to
cover flaps of a container, schematically shown herein with
sectioned cover-flap portions A and B, respectively, which have to
be temporarily and releasably interconnected.
First of all, if there was a backing material 8 attached to the
bottom of the composite sealing tape of FIG. 4, this is removed.
Then the adhesive layer 4 of the first terminal area 1a of tape
portion 1 and the inner end portion 2a of the tape portion 2 are
attached to the top surface of the cover flap A, as shown in the
right-hand side of FIG. 4A, in such a way that line 1d printed on
the top surface of portion 1 substantially coincides with the edge
of the cover flap A, as shown.
Then the rest of the sealing tape is folded about the edge toward
the undersurface of the flap A and the rest of the portion 2 is
stuck to said undersurface with some force.
Although the sealing tape of FIG. 4 has been described so far it
may be noted at this point that when using the tape of FIG. 3, the
innermost end of the auxiliary tape portion 3, which is originally
inserted between the limbs of the turned-up section 2a of the tape
portion 2, would not become attached to the undersurface of the
flap A.
In the next step, the tape portion 3, in combination with the free
or terminal section 1b, is peeled off and pulled upwards, as viewed
in the drawing, beyond the edge of the flap A, and then the
auxiliary tape portion 3 thus lifted up can be stuck onto the
opposite cover flap B of the box (see subsequent FIGS. 4B and 4C,
respectively).
In the stage shown in FIG. 4C, portion 1b is attached, on one hand,
to the top surface of the portion 3 (adhering to the flap B) while,
on the other hand, portion 1b is also attached to the undersurface
of the portion 2 at its turned-up section 2a (which in turn adheres
to flap A). Thus the sealing between the flaps A, B is
accomplished.
For purposes of releasing the seal or connection between the flaps,
the portion 1b can be peeled off or separated, as shown in FIG. 4C,
by pulling upwards the picking tab 6 (or its modified version 1c,
as shown in FIG. 3). Moreover, in cases when it is required to
leave the mouth of the box or container unsealed for some period,
the free portion 1b may be temporarily attached to the outer
surface of the reinforcing tape portion 2 on the inner side of the
cover flap A. This will also allow the adhesive layer 4 applied to
the undersurface of the free portion 1b to maintain its adhesive
ability since the layer is protected from air. Any subsequent
sealing and unsealing can be performed merely by repeating the
above-explained procedure with reference to the free portion 1b of
the main tape portion 1. This of course is shown in FIG. 4D where
portion 1b has been lifted off the cover flap B.
It should of course be understood that the procedural steps
described with reference to FIGS. 4A to 4D do not apply to the
fourth embodiment of FIG. 4 alone. In particular, the first
exemplary sealing-tape embodiment of FIG. 1 can be used to the same
effect, in that the only difference will be no intermediate layer
(the auxiliary tape portion 3) between the portion 1b and the cover
flap B. As has been explained before, the container itself may be
given an appropriate surface, at least in the area of the flap B,
for example if the same is treated with a releasing agent, or
covered with cellophane paper, vinyl tape or the like.
When the tape of FIG. 3 is used in the manner shown in the
procedural illustrations, the inner end which originally projects
into the section 2a, can be folded down about the edge of the cover
flap B, as shown by the dot-dash line constituting an extension
thereof in FIG. 4D. This will produce a reinforcing effect for the
edge of the flap B, in a manner similar to that provided by the
reinforcing tape portion 2 which is folded about the opposite edge
of the flap A.
For many years, the repeated sealing with adhesive tapes has been
considered to be impossible. The present invention, however, makes
this sort of sealing not only possible but economically desirable.
In this respect, the invention is believed to be novel and very
useful.
In a composite sealing tape of the kind herein described and
illustrated, the main tape portion is of course subjected to the
strongest pulling force. As has been explained in the foregoing,
this portion is substantially integrally connected to the end
portion 2a of the reinforcing tape portion 2, the latter being
firmly attached to the flap A by way of its entire undersurface.
Therefore, not only the cover flap A but also the main tape portion
1 is properly reinforced to prevent any tearing even if the main
tape portion is pulled very strongly when unsealing the box or
container. This feature presents a superior effect in practical
use.
It will be noted that all adhesive layers of the composite sealing
tape are protected from the effects of ambient air while in storage
or in use. It is well known that any tape which has its adhesive
layer or layers protected from air before or after its use is
capable of being used repeatedly and for a prolonged period. The
inventive sealing tapes satisfy this requirement.
No specific data were given herein in regard to the kind of
adhesives, releasing agents and other substances that may be used
in practicing the invention, and also in regard to specific grades
of materials which are best suited for purposes of the inventive
composite sealing tapes. It should be noted, however, that these
characteristics, materials and other details are well known to
those skilled in the art, and no protection is sought for these
expedients beyond the features explained hereinabove and set forth
in the claims. Very good results were obtained with commercially
available pressure-sensitive adhesives and releasing agents such as
for example, those made according to the U.S. Pats. 2,971,863 and
2,987,420, and/or German Pat. 855,746, fully identified in the
introduction of this application.
It should also be understood that the foregoing disclosure relates
only to preferred embodiments of the invention, and that it is
intended to cover all changes and modifications of the examples
described which do not constitute departures from the spirit and
scope of the invention as set forth in the appended claims.
* * * * *