JP2002254870A - Bag-shaped sheet for filing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a bag-shaped sheet for filing which makes the edges of papers or the like move smoothly without resistance even when they come close to a belt-shaped bonded part on the occasion of putting the papers in and out of the internal space of the sheet, and thus makes it possible to put the papers in and out smoothly. SOLUTION: The bag-shaped sheet being square and flat is formed of a thermally weldable synthetic resin film. One lateral edge of the sheet ranging from the opening 1 thereof to the seal line 2 at the bottom is formed into a belt-shaped binding margin 3 of a prescribed width by ultrasonic sealing and further filing holes 4 are so formed as to be disposed therein. In the bag-shaped sheet A for filing thus constituted, the belt-shaped binding margin 3 has a laminated structure wherein one belt-shaped thermally weldable synthetic resin film 6 having a smooth lateral side is held between two thermally weldable synthetic resin films 5a and 5b constituting the surface and the rear of the bag-shaped sheet and the films are integrated by welding so that the lateral side of the film 6 is exposed inside the bag.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag-like sheet for filing that can hold documents and the like in a bag-like sheet and store it in a ring binder or the like.

[0002]

2. Description of the Related Art A general file book is designed so that documents and photographs can be stored in a transparent or translucent bag-like sheet made of synthetic resin.

[0003] Such a file book is also called a ring binder. A plurality of bag-like sheets are formed with a hole for locking at a binding margin, and each bag-like sheet can be appropriately attached and detached one by one. In this manner, a mechanism is provided in which a plurality of half rings for locking are arranged and fixed on the inner part of the spine, and the top of the ring can be opened and closed.

As shown in FIG. 4, a conventional bag-like sheet B held by a ring binder has a structure in which a pair of opposed sides 21 and 22 of a heat-sealable rectangular synthetic resin film 20 such as polypropylene. And their sides 21,
A large number of welding points 11 are provided at a constant width along 22 and thereby the films are welded together to form a flat cylindrical body having a band-shaped binding margin 23. One end of the opening at both ends of the cylindrical body And a plurality of filing holes 4 are formed at intervals in the longitudinal direction of the band-shaped binding margin 23.

[0005] Such a bag-like sheet for filing,
Opening and closing the tops of a pair of half-rings attached to a general filing tool, binding margin 2 of bag-shaped sheet B
The file hole 3 can be attached to and detached from the ring, and one to several documents can be taken in and out of the opening of the bag-shaped sheet B.

[0006]

However, in the above-described conventional bag-shaped sheet for filing, the gap between the film surfaces inside the bag-shaped sheet becomes narrower as it approaches the band-shaped binding margin 23. In other words, Wedge-shaped internal space 24 at the side edge
Therefore, there is a case where the document at the time of putting in and taking out is caught in this portion and does not move. That is, when a document is inserted into the bag-shaped sheet, one side edge of the document may approach the side edge in the bag-shaped sheet. At this time, the document is inserted into the wedge-shaped gap between the two synthetic resin films. There is a problem that the document cannot be moved and cannot be smoothly taken in and out due to being sandwiched.

[0007] In addition, such a problem is caused particularly when a heat-sealable synthetic resin film is used, since the film surfaces inside the bag-like sheet are in close contact with each other without an adhesive layer therebetween, and the internal gap is narrowed. This is particularly likely to occur when a stretched polypropylene film (hereinafter abbreviated as OPP) is welded, or when a strip-shaped adhesive portion is formed by ultrasonic heat welding.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems, and when a document or the like is put in or taken out of the internal space of a filing bag-like sheet, the side edge of the document or the like adheres to the band-like bonding portion of the bag-like sheet. An object of the present invention is to provide a filing bag-like sheet that allows smooth sliding without any resistance even when approaching, so that documents can be smoothly taken in and out.

[0009]

In order to solve the above problems, according to the present invention, a rectangular flat bag-shaped sheet is formed of a heat-sealable synthetic resin film, and a band-shaped sheet is formed on one side edge of the bag-shaped sheet. In the filing bag-like sheet having the binding margin of the above, the binding margin is such that one or more belt-shaped, smooth side-surface heat-welding is performed between two heat-fusible synthetic resin films constituting the front and back surfaces of the bag-like sheet. The filing bag-shaped sheet has a binding margin that is welded and integrated so that the side surfaces are exposed in the bag with the synthetic resin film interposed therebetween.

In the above-mentioned filing bag-like sheet, the gap between the film surfaces inside the bag-like sheet is appropriate even in a portion close to the band-shaped binding margin, and a so-called conventional wedge-shaped internal space is not formed. In addition, one or more belt-like heat-sealable synthetic resin films interposed between two heat-sealable synthetic resin films have smooth side surfaces exposed inside the bag-like sheet along a binding margin, and a liner or Act as a guide.

[0011] Therefore, even when the heat-sealable synthetic resin film is a stretched polypropylene film or the like, even if the side edge of the document or the like approaches the band-like bonded portion when the paper is inserted into or removed from the opening, the film is sandwiched between the two films. As it moves smoothly without contact, it is possible to smoothly put documents in and out of the bag-like sheet.

Further, in order to solve the same problem as described above,
In the above filing bag-like sheet, the flat bag-like sheet is formed by overlapping a pair of opposing sides of a square heat-sealable synthetic resin film and welding the film surface with a constant width along those sides. Thus, a flat cylindrical body having a band-shaped binding margin is formed, and a configuration is adopted in which a bag-shaped sheet is sealed at one end among the openings at both ends of the cylindrical body.

The above-mentioned filing bag-like sheet has a band-shaped binding margin on one side edge, but the other side edge is a bent portion of the synthetic resin film, and this portion depends on the thickness of the synthetic resin film. Since a concave surface is formed with a radius of curvature (R), even if a side edge of a document or the like approaches this portion, the document can be moved smoothly without fail, so that the document can be taken in and out smoothly.

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, in the embodiment, a flat and flat bag-like sheet is formed of a heat-sealable synthetic resin film, and a sealing line 2 from the opening 1 to the bottom of the bag-like sheet. One side edge leading to about 1 to 2 cm, preferably about 1.5 cm, is bonded by ultrasonic sealing so as to form a number of bonding points by an ultrasonic seal to form a band-shaped binding margin 3 and a number of files. This is a filing bag-like sheet A in which holes 4 are formed at predetermined intervals. And the band-shaped binding margin 3 of this is a band-shaped heat-sealable synthetic resin film in which one side surface 6a is smooth between two heat-sealable synthetic resin films 5a and 5b constituting the front and back surfaces of the bag-like sheet. 6 is a filing bag-like sheet having a binding margin 3 which is laminated and welded and integrated so that the side faces are exposed in the bag with 6 interposed therebetween.

In order to produce the above-mentioned flat bag-shaped sheet, a pair of opposing sides of a rectangular heat-sealable synthetic resin film used as a material are overlapped, and a predetermined width is set along the side by ultrasonic sealing. To form a band-shaped binding margin 3, and an opening 1 is formed at the upper end of the openings formed at both ends in the longitudinal direction of the binding margin 3.

Examples of the above heat-sealable synthetic resin film include polyvinyl chloride, polypropylene, polyethylene, polystyrene, polyolefin copolymer, polyvinyl chloride copolymer, polyacrylate, vinylidene chloride copolymer and the like. (A film with a heat-adhesive coat) provided by laminating or coating the same, and a well-known heat-sealable synthetic resin film for packaging can be used. Of these,
In particular, the stretched polypropylene film has good transparency, good slippage of the paper, and has substantially the same stiffness (elasticity) as that of paper used for general-purpose documents. It is a preferred material that can be handled with the same feel.

The main body of the bag-shaped sheet is formed from such a heat-sealable synthetic resin film, and one longitudinal side surface sandwiched and held between the two heat-sealable synthetic resin films 5a and 5b. The smooth heat-sealable synthetic resin film 6 may be any material as long as it is heat-sealable, and there is no particular limitation on whether or not it is the same material as the synthetic resin film. For example, as a belt-shaped heat-sealable synthetic resin film, not only an oriented polypropylene film (OPP film),
An unstretched polypropylene film (CPP film) can also be used.

The thickness (that is, the height of the side) of the heat-sealable synthetic resin film 6 having a smooth side surface is equivalent to the thickness of one or more sheets to be stacked and adjusted and stored. The thickness of a single film does not need to be particularly limited. In order to form the side surface of the belt-shaped heat-sealable synthetic resin film smoothly, a smooth cut surface without unevenness may be formed by using a sharp cutter or the like when cutting.

In order to produce a flat bag-like sheet as efficiently as possible using a single rectangular heat-sealable synthetic resin film, it is preferable to carry out the following steps.

As shown in FIG. 3, first, when a pair of opposing sides of a rectangular heat-sealable synthetic resin film 5 are overlapped with each other, a portion 8 where a band-shaped binding margin 3 (see FIG. 1) is to be formed is formed. Is slightly shifted from the side edge toward the center. In other words, the left and right side edges 9 and 10 are overlapped at both ends of the heat-sealable synthetic resin film 5 so as to be constituted by bent portions of the synthetic resin film.

Next, the overlapping portion of the synthetic resin film is aligned to a fixed width (this is to be a portion 8 where a band-shaped binding margin is to be formed).
And ), A number of welding points 11 (see FIGS. 1 and 2) are formed by ultrasonic sealing to form a band-shaped binding margin 3.
Then, the end is cut out along the cutting line shown by the chain line in FIG. Then, the lower end of the openings formed at both ends in the longitudinal direction of the binding margin 3 is closed with a seal line to form a bag-like sheet.

As shown in FIG. 2, the belt-like heat-sealable synthetic resin film 6 interposed between the two heat-sealable synthetic resin films 5a and 5b has a smooth longitudinal side surface 6a. The side surface is exposed inside the bag-like sheet along the binding margin and acts as a liner or guide.

Therefore, the side edges of the document P shown in FIGS.
Even when approaching from the inside of the bag-like sheet, since it slides while being guided by the side surface 6a at an appropriate gap, it is possible to smoothly put documents in and out of the bag-like sheet.

As shown by the dashed line in FIG. 2, the heat-sealable synthetic resin films 12 and 13 are separately laid on the respective surfaces of the two heat-sealable synthetic resin films 5a and 5b and appropriately reinforced. Of course, the whole may be integrated by a heat welding method.

[0026]

As described above, according to the present invention, at least one layer of heat-sealable material is provided between both ends of a heat-sealable rectangular synthetic resin film on the band-like adhesive portion of the bag-like sheet for filing. The laminated structure is made by laminating through a synthetic resin film, so that when putting documents in and out of the interior space of the filing bag-like sheet, even if the edges of the documents come close to the band-shaped binding margin, they are smooth without any resistance. The filing bag-like sheet has the advantage that it can move smoothly, and the document can be smoothly taken in and out.

In the above filing bag-shaped sheet, even if the heat-sealable synthetic resin film is a stretched polypropylene film, even if the edge of a document or the like approaches the band-shaped bonding portion when the edge is taken in and out, It has the advantage of moving smoothly without resistance.

In the above-mentioned filing bag-like sheet, if a band-like heat-sealable synthetic resin film is provided on the outside of the band-like bonding portion, the binding margin is further reinforced and a durable filing is provided. It becomes a bag-shaped sheet.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment.

FIG. 2 is an enlarged sectional view of a main part of the embodiment shown in FIG. 1;

FIG. 3 is a cross-sectional view of a heat-sealable synthetic resin film illustrating a manufacturing process of the embodiment.

FIG. 4 is an enlarged sectional view of a main part of a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Opening part 2 Sealing line 3, 23 Binding margin 4 File hole 5, 5a, 5b, 12, 13, 20 Heat-sealable synthetic resin film 6 Band-shaped heat-sealable synthetic resin film 6a Side surface 8 Planned part 9, 10 Side edge 11 Welding points 21, 22 Side 24 Wedge-shaped internal space A, B Bag-shaped sheet P Document

Claims (3)

[Claims] 1. A filing bag-like sheet in which a rectangular flat bag-like sheet is formed of a heat-sealable synthetic resin film, and a band-like binding margin is formed on one side edge of the bag-like sheet. However, one or more belt-shaped heat-sealable synthetic resin films having a smooth side surface are sandwiched between two heat-sealable synthetic resin films constituting the front and back surfaces of the bag-shaped sheet, so that the side surfaces are exposed in the bag. A filing bag-like sheet characterized by a binding margin that is integrated by welding. 2. The bag-like sheet for filing according to claim 1, wherein the heat-sealable synthetic resin film is a heat-sealable stretched polypropylene film. 3. A flat bag-like sheet is formed by laminating a pair of opposing sides of a square heat-sealable synthetic resin film, and welding the film surface with a constant width along those sides to form a band-like binding. 2. A bag-like sheet formed with a flat cylindrical body having a margin and sealed at one end among openings at both ends of the cylindrical body.
Or the bag-like sheet for filing according to 2.