JP2620845B2 - Cover with adhesive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover with an adhesive, and more particularly to a cover with an adhesive so that a user can easily bind a sheet such as a catalog, a plan, or a document stored at home. About.

[0002]

2. Description of the Related Art Conventionally, as a cover with an adhesive which enables a large number of unprinted sheets such as catalogs to be easily bound at an office or at home, for example, Japanese Patent Publication No. 54-38.
It is already known as seen in Japanese Patent Application No. 929. As shown in FIG. 6, the conventional adhesive-backed cover includes a front sheet A made of a transparent material, a back sheet B and a back sheet C made of an opaque material, and the back sheet B and the back sheet C are folded in a first fold. A narrow connecting sheet F is connected to the front sheet A via a second fold E at a front portion of the back sheet C opposite to the back sheet side. A first adhesive layer G for bookbinding made of a hot-melt adhesive is formed on the inner surface of the sheet C, and a second adhesive layer H for connection made of a hot-melt adhesive is formed on the inner surface of the connection sheet F; The outer surface of one end of the front sheet A is bonded to the second adhesive layer H. When a large number of unbound sheets such as catalogs are bound on the adhesive-backed cover, for example, the front sheet A and the back sheet B are erected with respect to the back sheet C, and
The first adhesive layer G on the inner surface is addressed to one side edge of a large number of paper sheets such as catalogs stacked at a predetermined thickness, and the outer surface of the back sheet C is heated with an electric heater to remove the first adhesive layer G. By fusing, one side edge of each of the paper sheets is bonded to the first adhesive layer G to perform bookbinding.

[0003]

However, the above-mentioned adhesive-backed cover has first and second adhesive layers G and H which are formed independently on the inner surface of the back sheet C and the inner surface of the connecting sheet F. Therefore, when manufacturing a cover sheet with an adhesive, the first adhesive supply device for the first adhesive layer and the second adhesive supply device for the second adhesive layer are separately provided as described in the patent publication. After forming the first adhesive layer G with the first adhesive supply device, it is necessary to form the second adhesive layer H with the second adhesive supply device,
Therefore, not only does the structure of the cover manufacturing apparatus become complicated,
There is a problem that the number of adhesive supply steps increases, and the unit price of the adhesive-backed cover manufactured by this cover manufacturing apparatus increases. Also,
For example, when examining the contents of a sheet bound on the cover, the front sheet A is mainly opened and folded or closed with respect to the back sheet C. Since the adhesive layer is exposed without being formed on the second fold portion E, when the front sheet A is repeatedly opened / closed, it is particularly damaged from the second fold portion E. There was an easy problem.

SUMMARY OF THE INVENTION An object of the present invention is to provide a structure having an adhesive layer for bookbinding and an adhesive layer for bonding a front sheet, which can reduce the unit price and can be used even when the front sheet is repeatedly opened and closed. Another object of the present invention is to effectively prevent the back sheet from being damaged from the fold on the front sheet side.

[0005]

In order to achieve the above object, the present invention provides a front sheet 1 of a transparent material,
A back sheet 2 made of an opaque material and a back sheet 3; the back sheet 2 and the back sheet 3 are connected to each other via a first fold portion 4; 5, a connecting sheet 6 connected to the front sheet 1 is connected to the inner surface of the back sheet 3 by a thick adhesive layer 7 made of a hot-melt adhesive.
Further, a thin adhesive layer 8 made of the hot-melt adhesive is formed continuously on the inner surface of the connection sheet 6, and the front sheet 1 is adhered to the thin adhesive layer 8.

[0006]

According to the present invention, since the thick adhesive layer 7 for bookbinding and the thin adhesive layer 8 for bonding the front sheet are formed continuously, the cover with the adhesive is provided with one adhesive supply device. In addition, it is possible to manufacture with a cover manufacturing apparatus having one adhesive supply step, and as a result, the unit price of the cover with the adhesive can be reduced, and the cover can be made cheaper. Moreover, since the thick adhesive layer 7 and the thin adhesive layer 8 are formed continuously on the inner surface of the back sheet 3 and the inner surface of the connection sheet 6, the gap between the back sheet 3 and the connection sheet 6 A thin adhesive layer 9 can be simultaneously formed inside the second fold portion 5, and the second fold portion 5 can be reinforced by the adhesive layer 9. Even if it is repeatedly opened or closed in a folded manner, it is possible to effectively prevent the second fold portion 5 from being damaged.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The adhesive-backed cover of the embodiment shown in FIGS. 1 to 5 has a front sheet 1 formed of a transparent material such as polyvinyl chloride resin or polypropylene resin, and a back sheet 2 and the back sheet. 2 is formed integrally with a back sheet 3 using an opaque material such as paper or synthetic resin. The front sheet 1 is preferably formed of a transparent material, but may be formed of another translucent material.

Further, the back sheet 2 and the back sheet 3 of the embodiment are continuously provided via a first fold portion 4 which is recessed toward the outer surface. A connecting sheet 6 with the front sheet 1 is continuously provided at the side front portion via a second fold portion 5 which is recessed toward the outer surface.

A thick adhesive layer 7 made of a hot-melt type hot-melt adhesive or the like is provided on the inner surface of the back sheet 3, and a thin adhesive layer made of the hot-melt adhesive is provided on the inner surface of the connection sheet 6. 8 are formed continuously from the inner surface of the back sheet to the inner surface of the connecting sheet.
The second fold 5 is reinforced by a thin adhesive layer 9 formed inside the second fold 5 between the connecting sheet 6 and the other end of the front sheet 1 on the thin adhesive layer 8. Adhere the outer surface. The thick adhesive layer 7 and the thin adhesive layer 8 are formed over substantially the entire length of the back sheet 3 and the connection sheet 6. In the embodiment, the thick adhesive layer 7 is formed to a thickness of about 0.7 mm to 1.0 mm,
At the time of binding a sheet such as a catalog, one side edge of the sheet is slightly buried in the molten thick adhesive layer 7 so that the thin adhesive layer 8 can be adhered. At the same time, the reinforcing adhesive layer 9 of the second fold portion 5 is formed to have substantially the same thickness as the thin adhesive layer 8.

In the embodiment, the connection sheet 6 is
When the connection sheet 6 is formed to be wider than the width of the back sheet 3 on the inner surface opposite to the back sheet of the connection sheet 6 and the connection sheet 6 is bent from the second fold portion 5 toward the back sheet 3, the thick adhesive layer The thin adhesive layer 8 is formed at a position not opposed to 7. With this configuration, when the front sheet 1 is folded on the back sheet 2 as shown in FIG. 4, the front sheet 1 can be prevented from coming into contact with the thick adhesive layer 7. A large number of covers can be stacked and transported in a state where the sheet 1 is folded on the back sheet 2 and the bulk can be reduced.

Next, the operation of the embodiment configured as described above will be described.

Since the thick adhesive layer 7 is formed on the inner surface of the back sheet 3 of the adhesive-backed cover formed as described above, paper sheets such as catalogs and plan books are bound in an office, or When binding paper sheets such as stored documents, the front sheet 1 and the back sheet 2 are erected with respect to the back sheet 3 as shown in FIG. One side of each sheet is addressed to one side edge of the sheet such as a catalog, and the outer surface of the back sheet 3 is heated by an electric heater such as a hot plate to melt the thick adhesive layer 7. The edge can be slightly buried and adhered to the thick adhesive layer 7, and the book can be bound by curing the thick adhesive layer 7.

Further, since the thick adhesive layer 7 and the thin adhesive layer 8 are formed continuously on the inner surface of the back sheet 3 and the inner surface of the connection sheet 6, the back sheet 3 and the connection sheet 6 A thin adhesive layer 9 inside the second fold 5 between
Can be formed at the same time, and the second fold portion 5 can be reinforced by the adhesive layer 9. Therefore, the front sheet 1 is repeatedly opened and closed with respect to the back sheet 3 in a folded state. In this case, it is possible to effectively prevent the second fold portion 5 from being damaged.

In the case of manufacturing a cover sheet with an adhesive, the adhesive supply port for the thick adhesive layer and the adhesive supply port for the thin adhesive layer are connected to one adhesive supply device. The back sheet 2 in which the sheet 6 and the back sheet 3 are integrally connected via the first and second fold portions 4 and 5 is moved in the length direction of the back sheet 3 to supply the adhesive. The hot melt adhesive is simultaneously supplied to the inner surface of the back sheet 3 and the inner surface of the connection sheet 6 to form the thick adhesive layer 7 and the thin adhesive layer 8 at the same time. A release agent layer such as liquid silicon is provided on the surface of the adhesive layer 7 or a release paper is attached thereto, and the outer surface of one end portion of the front sheet 1 is bonded to the thin adhesive layer 8 on the inner surface of the connection sheet 6. As described above, since the thick adhesive layer 7 for bookbinding and the thin adhesive layer 8 for bonding the front sheet are respectively formed continuously and simultaneously, the cover sheet with adhesive is provided with one adhesive supply device, and It is possible to manufacture with a cover manufacturing apparatus having a single adhesive supply step, so that the unit price of the cover with the adhesive can be reduced and the cover can be reduced in cost.

In the embodiment described above, when the thick adhesive layer 7 and the thin adhesive layer 8 are formed, as shown in FIG. The thin adhesive layer 10 continuous with the thick adhesive layer 7
May be formed to reinforce the first fold portion 4.

[0016]

As described above, according to the present invention, the thick adhesive layer 7 for bookbinding and the thin adhesive layer 8 for bonding the front sheet are formed continuously, respectively. It is possible to manufacture with a cover manufacturing apparatus having an adhesive supply device and a single adhesive supply step. As a result, the unit price of the cover with the adhesive can be reduced, and the cover can be reduced in price. Moreover, since the thick adhesive layer 7 and the thin adhesive layer 8 are formed continuously on the inner surface of the back sheet 3 and the inner surface of the connection sheet 6, the gap between the back sheet 3 and the connection sheet 6 A thin adhesive layer 9 can be simultaneously formed inside the second fold portion 5, and the second fold portion 5 can be reinforced by the adhesive layer 9. Even if it is repeatedly opened or closed in a folded manner, it is possible to effectively prevent the second fold portion 5 from being damaged.

[Brief description of the drawings]

FIG. 1 is a perspective view in which a part of a cover with an adhesive of the present invention is omitted.

FIG. 2 is an enlarged cross-sectional view of a state where a front sheet is opened in a developed state with respect to a back sheet.

FIG. 3 is an enlarged cross-sectional view of a state in which a front sheet is folded and closed with respect to a back sheet.

FIG. 4 is an enlarged sectional view of a state in which a front sheet is folded on a back sheet.

FIG. 5 is an enlarged sectional view showing another embodiment and corresponding to FIG. 2;

FIG. 6 is a partially omitted sectional view showing a conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 front sheet 2 back sheet 3 back sheet 4 first fold portion 5 second fold portion 6 connection sheet 7 thick adhesive layer 8 thin adhesive layer

Claims (1)

(57) [Claims] 1. A front sheet (1) of a transparent material,
A back sheet (2) made of an opaque material and a back sheet (3), wherein the back sheet (2) and the back sheet (3) are continuously provided via a first fold portion (4); A connecting sheet (6) with the front sheet (1) is connected to the front part of (3) via a second fold part (5), while a hot-melt adhesive is applied to the inner surface of the back sheet (3). And a thin adhesive layer (8) made of the hot-melt adhesive formed continuously on the inner surface of the connection sheet (6), and the thin adhesive layer (8) is formed. ), Wherein the cover sheet (1) is bonded to the cover sheet.