JP2002080047A - Self-opening square bag with cushioning property, intermediate product of the bag and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a self-opening square bag which has no pasted portion which is a weakness in strength and which can be folded, and an intermediate product thereof. SOLUTION: A paste is applied to a region of a rectangular sheet of paper 4A to be filled with cushioning materials, fragmented cushioning materials 5 are shaken to be attached, and a paste is applied to an area corresponding to a region where the cushioning materials are not attached, thereby preparing a material of the self-opening square bag filled with the cushioning materials in a predetermined region between two sheets and also providing a crease for folding. Slits 11, 12, 13 and 14 are made on a part to be a bottom of the square bag to provide two narrow flaps 15 and 16 and two wide flaps 17. Both ends are glued to each other to form a cylinder, which is folded to form gussets, providing the intermediate product 2 of the self-opening square bag with gussets. The flaps on the bottom are folded and unified to make the square bag.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cushioned bottom bag. The present invention also includes an intermediate product for the square bottom bag and a method for producing the same.

[0002] Here, the term "paper" is a generic term for relatively durable paper used for medium to large envelopes.

[0003]

2. Description of the Related Art An envelope made of a material filled with a cushioning material, typically a spread of waste paper, between two sheets of paper, a so-called cushioning envelope is used for a floppy (registered trademark) disk or a CD-R.
It is used for transportation of OM and other articles that require careful handling.

[0004] Due to the structure of this type of buffer envelope, a very thick one cannot be accommodated. A buffer envelope with the structure of a normal envelope, that is, one sheet of buffer-filled paper is folded and affixed at the center of the back surface, aside from the two sheets of paper, four layers of buffer-filled material are superimposed. In the case where the envelope is formed by bonding the three peripheral edges, the edge portion is weak, and when trying to accommodate a very bulky article, the envelope is often damaged from the bonded portion of the edge.

To cope with this problem, a gusseted bottomed bag may be used. However, a method for manufacturing a buffered envelope with a bottomed bottom with a high productivity has not been established. Had not appeared. Further, even if a buffer envelope with a square bottom is manufactured, the envelope itself is bulky and inconvenient for transportation, storage and sale, and cannot be said to be practical.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems in the field of shock-absorbing envelopes of the type in which shock-absorbing material is filled between two sheets of paper and to accommodate bulky contents. In a square bottom bag that is suitable in principle, there is no bonding that is a weak point in strength, and it can be folded,
It is to provide a square bottom bag which is convenient for storage and transportation.

[0007] It is a further object of the present invention to provide an intermediate product which, when not in use, is in a gusset-folded, non-bulky form and which can be easily assembled into a square bottom bag when used. An object of the present invention is to provide a method for producing an intermediate product and a finished product.

[0008]

According to the present invention, as shown in FIG. 4 to FIG.
A, 4B) is a square-bottomed bag (3) made of a material (1) filled with a cushioning material (5), and an upper opening edge (31).
From the gusset to the torso (32)
The cushioning material is filled in the vicinity of 3) and in the lower part except the four flaps, and the four flaps are formed by slits (11, 12, 13, 14) at the four corners, both end walls. And two wide flaps (17, 18) connected to both side walls.
Each of the flaps is bent inward, and has a dimension substantially equal to the dimension of the bottom face applied from below, and is integrated by a bottom fixing material (7) coated with an adhesive (6). It is a square bottom bag with a cushioning property that constitutes the bottom.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The intermediate for a cushioned bag with cushioning properties described above is in the stage of FIG. 2 in the manufacturing process. The method of the present invention for producing this comprises the following steps A to D, as shown in FIGS.

A) The area (41) of the rectangular paper (4A) to be filled with the cushioning material is coated with glue, and the cushioning material (5) is subdivided.
B) The area (4) of the paper (4A) where the cushioning material is not attached
2) Alternatively, glue is applied to an area corresponding to that of another sheet of paper (4B), and two sheets of paper are overlapped and pressed, so that a cushioning material (5 ) Is prepared and a ruled line for bending is provided. C) A slit (11,1) is formed in the bottom portion of the square bottom bag material.
2,13,14) and two narrow flaps (1
(5, 16) and two wide flaps (17, 18); and D) Attach both ends of the material (1) of the square bottom bag at the portion of the glue allowance (19) to form a tubular body. Form, gusset fold,
An intermediate product (2) in a square bottom bag provided with gussets.

The slits may be formed at the stage of punching the paper prior to the preparation of the above-mentioned material.

Following the above steps A to D, the following step E
Is carried out as shown in FIG. 3 to obtain the square bottom bag (3) of the present invention.

E) Four flaps (15 to 18) are folded inward and overlapped, and a bottom fixing material (7) having a size substantially equal to the size of the bottom surface and coated with an adhesive (6) from below. ) To constitute the bottom part. In FIG. 3, the numbers in the circles indicate the order in which the flaps are bent and the bottoms are integrated. Although not shown, this corresponds to the bending of the narrow flaps (15).

Normally, the cushioning performance of the square bottom bag is also required for the bottom surface. In order to meet this demand, as shown in FIG.
A bottom cushion piece (8) made of a material filled with cushioning material between sheets of paper may be placed at the bottom of the bag.

On the other hand, in order to close the mouth of the square bottom bag, it is necessary to use a separate stapler or stick an adhesive tape, but in order to facilitate the latter work, as shown in FIG. A sealing material (9) coated with an adhesive (6) is attached to one of the openings (31) connected to both side walls of the square-bottom bag to extend the opening, so that the adhesive is exposed. It is desirable to prepare a sheet to which a release paper (not shown) is applied.

The intermediate product obtained as described above has a minimum thickness despite the presence of the cushioning material, so that it is convenient for transportation and storage, and also for display and sale. In order to make one product at a time, it is recommended that the intermediate product be combined with the above-mentioned bottom cushioning material and / or sealing member, if necessary, to form a kit.

[0017]

The buffered square bottom bag of the present invention can be easily used for its purpose as a buffer envelope for accommodating bulky contents due to its gusseted structure, and is damaged from the bonded portion of the peripheral edge. Don't worry about it. If necessary, a cushioning material is applied to the bottom, and the interference performance becomes almost perfect. In the upper part, if the side wall filled with the cushioning material is left, the cushioning performance can be obtained by folding the side wall. If the object to be packaged is tall and there is no room to bend the side wall, the same material as the bottom cushioning material can be placed on top and used to facilitate packaging with perfect cushioning.

The intermediate product of the cushioned bottom bag having such a cushioning property includes a paper folding portion, that is, four ridges in the vertical direction, a total of two bending lines running in the center of both end walls to be gusset-folded, and Each of the four corners surrounding the bottom can be folded without any trouble because there is no cushioning material in that part and only two sheets of paper are stuck together. Absent. Thus, the intermediate product can be advantageously stored, transported and sold.

The buffered square bottom bag of the present invention can be manufactured using paper and waste paper spread products as main materials, and in addition to using a small amount of glue and adhesive. Since it does not include a step having technical difficulty, it can be performed with high productivity. Accordingly, the cushioned square bottom bag and its intermediate product can be provided at low cost.

Another advantage of the cushioned square bottom bag of the present invention is that it is easy to recycle after use. Both the paper as the main material and the waste paper opened product can be reused as pulp after being separated and collected.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a method for producing a buffered square bottom bag according to the present invention.
FIG. 9 is a diagram for explaining the process A, and is a plan view showing in advance a region where paper is to be glued and positions of slits provided in a subsequent process. A is a development view of the main body of the square bottom bag, and B is a view of the bottom cushioning material.

FIG. 2 is a view for explaining steps C and D of the manufacturing method of the present invention, in which the ends of the raw material in FIG. 1 are bonded together to form a square tube and gusset-folded, that is, the intermediate product of the present invention. FIG. 1A is a side view showing a cushioning material that is partially cut open and filled, and FIG. 1B is a cross-sectional view of A in the II direction.

3 is a view for explaining a step E of the production method of the present invention, wherein the intermediate product of FIG. 2 is formed into a rectangular cylindrical body, and a flap is integrated with a bottom fixing sheet coated with an adhesive; It is a perspective view which shows the place to form.

FIG. 4 is a view for explaining a preferred embodiment of the present invention, and is a perspective view showing that a bottom cushioning piece is added to the square bottom bag having the bottom formed in FIG. 3;

5 shows the structure of the bottom of the square bottom bag of the present invention, FIG.
It is sectional drawing of the II-II direction.

FIG. 6 shows the structure of the bottom of the square bottom bag of the present invention.
It is sectional drawing of the III-III direction.

FIG. 7 is a view for explaining a preferred embodiment of the square bottom bag of the present invention, and is a perspective view showing a sealing member coated with an adhesive and extending from an opening of the square bottom bag. .

[Explanation of symbols]

Reference Signs List 1 material of square bottom bag 11, 12, 13, 14 slit 15, 16 narrow flap 17, 18 wide flap 19 glue allowance 2 intermediate product 3 square bottom bag 31 opening 32 body 33 fold 4A, 4B paper 41 Area to be filled with buffer material 42 Area to which buffer material is not attached 5 Buffer material 6 Adhesive 7 Bottom fixing material 8 Bottom buffer piece 9 Sealing material

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masaki Iwasaka 2-50, Senari-dori, Nakamura-ku, Nagoya City, Aichi Prefecture Inside Kawakami Sangyo Co., Ltd. (72) Inventor Shozo Suzuki 2-81-11, Nihonbashi, Chuo-ku, Tokyo F-term (reference) in Kyokuyo Sigma Corporation 3E064 AB03 BA01 BB04 HF10 HG03 3E066 AA33 CA03 CB03 GA01 KA20 MA01 NA43

Claims (6)

[Claims] 1. A square bottom bag made of a material in which a cushioning material is filled between two sheets of paper, wherein the bag extends from an opening edge of an upper portion to a body portion, near a gusset-folded fold, and at a lower portion. Except for the four flaps, the cushioning material is filled, and the four flaps are formed by slits at four corners, two narrow flaps connected to both end walls and two wide flaps connected to both side walls. These four flaps are folded inward, and have a size substantially equal to the size of the bottom surface applied from below, and are integrated by a bottom fixing material coated with an adhesive to form a bottom portion. A cushioned bag with a square bottom. 2. A bottom cushioning material having a size substantially equal to the inner dimension of the bottom surface of the square bottom bag and made of a material in which cushioning material is filled between two sheets of paper is disposed on the bottom of the bag. 2. The bag according to claim 1, wherein the bag has cushioning performance. 3. A sealing material coated with an adhesive is attached to one of the openings connected to both side walls to extend the opening, and a release paper is applied to a portion where the adhesive is exposed. Square bottom bag with 1 or 2 cushioning properties. 4. An intermediate product for forming a shock-absorbing square bottom bag according to any one of claims 1 to 3,
The lower flap is not folded. The bottom fixing material coated with adhesive is applied to one of the two wide flaps of the main body with the gusset folded, and release paper is applied to the exposed part of the adhesive. An intermediate product for a square bottom bag having a cushioning property, which comprises an essential component and optionally a bottom cushioning material according to claim 2. 5. As a cushioning material to be filled between two sheets of paper,
The square bottom bag having cushioning properties according to any one of claims 1 to 4, wherein an opened fiber of waste paper is used. 6. A method for manufacturing an intermediate product for a square bottom bag having a cushioning property according to claim 4, comprising the following steps: A) Filling a rectangular paper cushioning material B) applying glue to the area to be scattered and sprinkling the fragmented cushioning material onto the area, and B) applying glue to the area of the paper where the cushioning material is not attached or the area corresponding to that of another piece of paper, Pressing two sheets of paper together to prepare a square bottom bag material filled with a cushioning material in a predetermined area between the two sheets of paper, and providing a ruled line for folding; Insert a slit in the bottom of the bottom bag material
D) providing a narrow flap and two wide flaps; and D) forming a tubular body by bonding both ends of the material of the square bottom bag, forming a gusset-folded gusset, and providing a gusset. To be an intermediate product.