JP2004338745A - Shock-absorbing envelope easily separatedly disposed, and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shock-absorbing envelope having a plastic foam sheet inside the paper envelope as a shock-absorbing material in which separate disposal after the use is further facilitated, a paper portion of the shock-absorbing envelope and a plastic foam sheet portion are neither adhered or melted to each other in a structural manner, the structure is very simple, the amount of the material to be used is small, and the manufacturing step is simple at low cost. <P>SOLUTION: A plastic foam sheet (2) is present as a shock-absorbing material along the inner side of a paper envelope (1). Plastic foam sheet locking paper pieces (3A, 3B and 3C) extending downwardly are provided on both inner sides of an envelope opening part. The shock-absorbing function is maintained over the entire face and back surfaces of the envelope by holding both ends (21 and 22) of the plastic foam sheet located in a vicinity of the envelope opening part. After the use of the envelope, the foam sheet (2) can be easily taken out by opening the locking paper pieces (3A, 3B and 3C) upwardly. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a buffer envelope having a plastic foam sheet as a buffer material inside a paper envelope, which makes it very easy to separate a paper portion and a plastic portion upon disposal after use. Here, the `` plastic bubble sheet '' is formed by vacuum forming a plastic film such as polyethylene to form a number of caps to form a cap film, and a flat plastic back film on the bottom surface of the cap by heat sealing etc. It refers to a sheet having a large number of sealed air chambers (hereinafter abbreviated as "bubble sheet").
[0002]
[Prior art]
Various structures have been devised for buffer envelopes using a bubble sheet as a buffer material, and some of them have been put to practical use. The simplest one is an envelope manufactured by heat-sealing a laminated material of paper and a bubble sheet, but has disadvantages such as poor aesthetic appearance and easy peeling of the side edges. In addition, after the buffer envelope is used, when it is discarded, if the paper and the plastic are integrated, they cannot be separated and collected. Today, this type of buffer envelope is discarded after use, and it is required to separate the paper portion and the plastic portion even when incinerated, as well as when attempting to recycle.
[0003]
From the viewpoint of the aesthetic appearance and the strength described above, a structure in which the bubble sheet is not exposed in a portion visible from the outside is preferred. However, they are generally difficult to separate and collect. Conventionally, the buffer envelope considering separation is limited to a region in which the paper and the bubble sheet are bonded or fused together as narrowly as possible so that the separation can be easily performed at the time of separation. If the paper and the bubble sheet are completely independent in the envelope itself, the separation and disposal should be easy.
[0004]
[Problems to be solved by the invention]
An object of the present invention is to further enhance the ease of sorting and disposal of the buffer envelope from such a viewpoint, and that the paper portion of the buffer envelope and the bubble sheet portion are not bonded or fused at all in terms of structure. It is an object of the present invention to provide a device which has a particularly simple structure, uses a small number of materials, has a simple manufacturing process, and can be manufactured at a very low cost. It is also an object of the present invention to provide an advantageous method of manufacturing such a buffer envelope.
[0005]
[Means for Solving the Problems]
The buffer envelope of the present invention which achieves the above object and which is very easy to separate and discard is provided with a buffer envelope along the inside of a paper envelope (1) as shown in FIGS. A plastic foam sheet (2) exists as a material, and a plastic foam sheet retaining paper piece (3A) extending downward is provided inside both sides of the envelope opening, and a plastic foam sheet located near the envelope opening is provided. By holding both ends (21, 22) of the envelope, the cushioning function over the entire front and back surfaces of the envelope is maintained.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Various embodiments of the buffer envelope of the present invention are possible. For example, as a paper envelope (1), a paper envelope formed by half-folding a piece of paper as a bottom portion and heat-sealing both side edges (4, 4) can be used. And it is advantageous.
[0007]
The foam sheet locking paper pieces may be two separate pieces, or may be configured as a continuous piece of locking paper piece (3). FIG. 3 shows the structure of such a buffer envelope. In this case, the locking paper piece (3) reaches the bottom inside the envelope, and substantially covers the entire surface of the plastic bubble sheet (2) as the cushioning material. This embodiment is preferred when it is desired to avoid the contents rubbing in contact with the plastic and generating static electricity.
[0008]
In the embodiment shown in FIG. 2 with respect to the bubble sheet locking paper piece, the locking paper piece (3A) is arranged so that one end is attached to the inside of the envelope and the other end extends downward near the envelope opening. It is structured and natural for locking the bubble sheet.
[0009]
On the other hand, as shown in FIG. 4, on the other hand, as shown in FIG. 4, the plastic foam sheet retaining paper piece (3B) is attached near the envelope opening at one end to the inside of the envelope, and the other end is folded back so as to extend downward. Some are arranged and configured. In this embodiment, the cushioning material can be positioned up to the opening of the envelope.
[0010]
In the example shown in FIG. 5, a plastic bubble sheet retaining paper piece (3C) is arranged near the envelope opening so that the end of the paper forming the envelope is folded back and extends downward. In this embodiment, as in the embodiment of FIG. 5, the cushioning material can be positioned up to the opening of the envelope.
[0011]
A normal envelope has a tongue (5) on one side at its opening for sealing. Buffer envelopes also typically have a similar configuration. In the embodiments shown in FIGS. 2 and 3, the tongue portion can be formed by making one edge of the paper forming the envelope longer by the tongue portion (5).
[0012]
Some buffer envelopes do not have a tongue portion. In particular, in the embodiment shown in FIG. 5, if a tongue portion is provided, another paper sheet is added. In this case, rather than providing a tongue portion, it is smarter to perform sealing by using a combination of a double-sided adhesive tape and release paper as shown by reference numerals (6A) and (6B) in FIG.
[0013]
The first method of the present invention for producing the above-mentioned buffer envelope which is extremely easy to separate and discard is composed of the following steps and has three modes. In either case, first, A) a plastic foam sheet as a cushioning material is formed on a heat-sealable surface of a heat-sealable paper by one of the following methods 1 to 3 to form an envelope. The step of fixing is performed.
[0014]
1) As shown in FIG. 6A, a plastic foam sheet (2) cut into an appropriate width and length is placed on a heat-sealable paper (1A), and as shown in FIG. The plastic foam sheet retaining paper piece (3A) is closely adhered to the outside of both ends (21, 22) by heat sealing or gluing, and both ends of the plastic foam sheet are retained at their free ends.
[0015]
2) As shown in FIG. 7A, a plastic foam sheet retaining paper piece (3B) is bonded onto a heat-sealable paper (1A) by heat sealing or gluing, and then, as shown in FIG. The foam sheet (2) cut into a suitable width and length is placed, and the locking paper piece (3B) is folded back to lock both ends (21, 22) of the plastic foam sheet.
[0016]
3) As shown in FIG. 8A, a plastic foam sheet (2) cut with an appropriate width and length is placed on a heat-sealable paper (1A), and as shown in FIG. Both edges of (1A) are folded inward, and both ends (21, 22) of the plastic foam sheet are locked.
[0017]
The subsequent steps are common and are as follows.
B) The paper (1A) is folded in half with the surface on which the plastic foam sheet (2) is placed inside.
C) Heat sealing is performed without affecting the plastic foam sheet (2) to form both side edges (4, 4) of the envelope.
[0018]
In the above-described manufacturing method, it is advantageous to continuously operate, that is, to feed out a long piece of paper and successively manufacture buffer envelopes, but of course batch-type manufacturing is also possible. When a continuous manufacturing process is employed, it is a matter of course, though not shown, that a step of cutting to obtain individual buffer envelope products follows heat sealing.
[0019]
The second method of the present invention for producing a buffer envelope that is extremely easy to separate and dispose of includes the following steps and has two modes. In both cases,
I) Prepare a paper envelope (7) and a bag (8) made of a plastic foam sheet that is slightly wider than the width of the paper envelope (7).
II) Next, as shown in FIG. 9, in the plastic foam sheet bag, the width is adapted to the internal dimensions, and the length is slightly longer than its depth. ) And heat-sealable paper from above,
1) Perforated (31) in the center, or
2) A plastic foam sheet retaining paper piece (3D) that has not been inserted is folded inward with the heat-sealable surface into two, and inserted between the core (9) and the plastic foam sheet bag (8). The area near the fold should exceed the upper edge of the plastic foam sheet bag.
[0020]
Next, as shown in FIG. 10A,
III) Both edges of the opening of the paper envelope are heat-sealed, and the vicinity of the fold of the plastic bubble sheet retaining paper piece (3D) is sealed to the opening of the paper envelope. At this time, the core (9) made of a metal plate helps determine the sealing position, and only the heat-sealing paper can be sealed in the envelope without erroneously sealing up to the plastic bubble sheet.
[0021]
Finally, as shown in FIG. 10B,
IV) 1) If perforations are provided on the plastic foam sheet retaining paper pieces (3D), tear off from the perforations;
2) If there is no perforation, cut off the fold,
The core (9) made of a metal plate is taken out, and the cushioning envelope is placed so that each of the two pieces of the plastic foam sheet retaining paper sheet retains both sides of the plastic foam sheet bag (8). Complete.
[0022]
【The invention's effect】
Since the buffer envelope of the present invention has the above-described structure, upon disposal after use, the locking paper pieces (3A, 3B, 3C) locking the bubble sheet inside the envelope are opened upward. Thereby, the bubble sheet (2) as the cushioning material can be easily taken out. By appropriately selecting the shape and size of the bubble sheet and stably positioning the bubble sheet on the inner surface of the envelope, the bubble sheet is not affected at the time of heat sealing and exhibits a full cushioning capacity. When discarded after use, since it is independent of paper, it can be easily taken out without requiring force for peeling, and as a result, separation becomes extremely easy.
[0023]
The first manufacturing method of the buffer envelope according to the present invention can be implemented simply by configuring the apparatus by combining the conventional paper half-folding means and the heat sealing means. The second manufacturing method can be implemented only by the heat sealing means. A sheet having heat sealing property on one side of paper can be easily obtained on the market. The materials used are minimal and have no waste in function. Therefore, the buffer envelope of the present invention can be manufactured at a low cost in any aspect and both manufacturing methods are selected.
[Brief description of the drawings]
FIG. 1 is a plan view showing the structure of a typical example of a buffer envelope according to the present invention, which is very easy to separate and discard, showing a partly cutaway view of the inside.
FIG. 2 is a sectional view taken along the line II of FIG. 1;
FIG. 3 is a sectional view similar to FIG. 2, showing another embodiment of the buffer envelope according to the invention;
FIG. 4 is a sectional view similar to FIG. 2, showing yet another embodiment of a buffer envelope according to the present invention.
FIG. 5 is a sectional view similar to FIG. 2, showing yet another embodiment of a buffer envelope according to the present invention.
FIG. 6 is a plan view illustrating a first embodiment of a first method for manufacturing a buffer envelope according to the present invention, wherein A is a stage where a plastic foam sheet is placed on paper forming an envelope, and B is At the stage where the locking paper pieces are pasted and locked.
FIG. 7 is a plan view illustrating a second embodiment of the first manufacturing method of the buffer envelope according to the present invention, wherein A is a stage in which a piece of locking paper is pasted on paper forming the envelope; B is the stage where the plastic foam sheet was placed and locked.
FIG. 8 is a plan view illustrating a third embodiment of the first method for manufacturing a buffer envelope according to the present invention, wherein A is a stage where a plastic foam sheet is placed on paper forming an envelope, and B is a stage. The stage where the edge of the paper is folded and locked.
9A and 9B are views for explaining a second method for manufacturing the buffer envelope according to the present invention, wherein A is a plan view partially cut away to show the inside, and B is a longitudinal sectional view of A.
FIG. 10 is a sectional view showing a step following FIG. 9 in a second method for manufacturing a buffer envelope according to the present invention, wherein A is a stage after heat sealing, and B is a cut-off piece of locking paper to complete the envelope. Stage.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Paper envelope 1A Heat sealable paper 2 Plastic foam sheet 21,22 Both ends 3,3A, 3B, 3C, 3D of plastic foam sheet Plastic foam sheet retaining paper piece 31 Perforation 4 Envelope side edge 5 Velo portion 6A Double-sided adhesive tape 6B Release paper 7 Paper envelope 8 Plastic air bubble sheet bag 9 Metal plate core

Claims (10)

A plastic foam sheet (2) exists as a cushioning material along the inside of the paper envelope (1), and a plastic foam sheet locking paper piece (3A, 3A, 3B, 3C), and by holding down both ends (21, 22) of the plastic foam sheet located near the opening of the envelope, the buffering function over the entire front and back of the envelope is maintained. Buffer envelope. 2. The buffer envelope according to claim 1, wherein the paper envelope (1) is formed by heat-sealing both side edges (4, 4) with a portion obtained by half-folding one sheet of paper as a bottom. A piece of plastic foam sheet retaining paper (3) is made of a continuous piece of paper, reaches the bottom inside the envelope, and covers substantially the entire surface of the plastic foam sheet (2) as a cushioning material. The buffer envelope of claim 1. 2. The buffer envelope according to claim 1, wherein the plastic bubble sheet retaining paper piece (3A) is configured such that one end is attached to the inside of the envelope near the envelope opening, and the other end is arranged to extend downward as it is. 2. The buffer envelope according to claim 1, wherein the plastic bubble sheet retaining paper piece (3B) is arranged so that one end is attached to the inside of the envelope near the opening of the envelope and the other end is folded back so as to extend downward. 2. The cushioning envelope according to claim 1, wherein the plastic bubble sheet retaining paper piece (3C) is arranged near the opening of the envelope so that the end of the paper forming the envelope is folded back and extends downward. 2. The cushioning envelope according to claim 1, wherein the envelope has an opening provided with a tongue on one surface. 2. The buffer envelope according to claim 1, wherein the envelope has no tongue at the opening, and the surfaces facing each other can be sealed with a double-sided adhesive tape. A method for manufacturing a buffer envelope that is extremely easy to separate and dispose, comprising the following steps:
A) A step of fixing a plastic foam sheet, which is a cushioning material, to a heat-sealable surface of a heat-sealable paper on one side to form an envelope by one of the following methods 1) to 1). After the plastic foam sheet (2) cut into a suitable width and length is placed on the heat-sealable paper (1A), the plastic foam sheet (2) is placed in close contact with the outside of both ends (21, 22) of the plastic foam sheet (2). The sheet locking sheet (3A) is adhered by heat sealing or gluing, and both ends of the plastic foam sheet are locked at their free ends.
2) A plastic foam sheet retaining paper piece (3B) is adhered to the heat-sealable paper (1A) by heat sealing or gluing, and then the plastic foam sheet (2) is formed with an appropriate width and length. The cut piece is placed, and the locking paper piece (3B) is folded back to lock both ends of the plastic foam sheet.
3) A plastic foam sheet (2) cut to a suitable width and length is placed on a heat-sealable paper (1A), and both edges of the paper (1A) are folded inward, and the plastic foam is cut. Engage both ends of the seat.
B) The paper (1A) is folded in half with the surface on which the plastic foam sheet (2) is placed inside.
C) By performing heat sealing without affecting the plastic foam sheet (2), the both side edges (4, 4) of the envelope are formed to complete the buffer envelope. A method for manufacturing a buffer envelope that is extremely easy to separate and dispose, comprising the following steps:
I) Prepare a paper envelope (7) and a bag (8) made of a plastic foam sheet with a width suitable for the inside dimensions and a little shallower.
II) In the bag made of plastic foam sheet, put a core (9) made of a metal plate whose width is adapted to its internal dimensions and whose length is slightly longer than its depth, and heat-sealed from above. Sex paper,
1) Perforated (31) in the center, or
2) The plastic bubble sheet retaining paper piece (3D) that has not been inserted is folded in two with the heat-sealable surface outward, and inserted between the paper envelope and the plastic foam sheet bag. Beyond the top edge of the foam bag.
III) Both edges of the opening of the paper envelope are heat-sealed, and the vicinity of the fold of the plastic bubble sheet retaining paper piece (3D) is sealed to the opening of the paper envelope.
IV) 1) If a perforation is provided on the plastic foam sheet retaining paper piece (3D), tear it from the perforation;
2) If there is no perforation, cut off the fold,
The core (9) made of a metal plate is taken out, and the cushioning envelope is placed so that each of the two pieces of the plastic foam sheet retaining paper sheet retains both sides of the plastic foam sheet bag (8). Complete.

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