JP2676332B2 - 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 an adhesive-attached cover sheet, more specifically, an adhesive-attached cover sheet that allows a user to easily bind a sheet such as a catalog, a plan document, or a document stored at home. Regarding

[0002]

2. Description of the Related Art Conventionally, a large number of unbound booklets such as reports and catalogs can be easily bound at an office or at home as an adhesive-attached front cover, a front sheet, a back sheet and a spine. It is well known that the back sheet comprises an adhesive layer for bookbinding made of a hot-melt adhesive on the inner surface of the spine sheet. And, the back sheet is erected with respect to the back sheet, and one side edge of a large number of paper sheets such as catalogs stacked in a predetermined thickness is applied to the adhesive layer on the inner surface of the back sheet, and an electric heater is used to This is done by heating the outer surface to melt the adhesive layer and adhering one side edge of each paper sheet to the adhesive layer.

[0003]

However, when a paper sheet on which printing with relatively weak ink inking property is printed, such as perforated plate printing, is bound, the front cover of the paper sheet (page 1 The components in the ink printed on the eyes) migrate to the back surface side of the front sheet and swell the front sheet, and as a result, the front sheet moves from one side of the back sheet to the other side of the back sheet. It may warp in the direction away from the back sheet as it goes to
Thus, the warped state of the front sheet is inconvenient for organizing and storing the bound files.

In view of the above-mentioned problems, an object of the present invention is to bind a front sheet to a back sheet even at the time of binding a printed sheet with relatively weak ink inking property. It is to provide an adhesive-attached cover sheet which is always conveniently used for organizing and storing a bound file by preventing the sheet from warping from the back sheet toward the other end from the back sheet.

[0005]

In order to achieve the above object, the present invention provides a synthetic resin front sheet, a back sheet facing the front sheet, and a back sheet connecting the front sheet and the back sheet. A cover sheet with an adhesive, which comprises a sheet and an adhesive layer formed by using a hot-melt adhesive on the back sheet, wherein the front sheet is between one end and the other end connected to the back sheet. Is curved so as to be separated from the back sheet.

In the present invention, since the middle portion of the front sheet is curved in the direction in which the front sheet is separated from the back sheet, the front sheet is formed by the transfer of the components in the ink printed on the paper sheet. Even if an attempt is made to warp in a direction away from the back sheet from one end connected to the back sheet to the other end, such warping can be resisted and does not occur.

Further, the front sheet has a shape such that the other end away from the back sheet gradually approaches the back sheet toward the edge thereof, so that when the file is stored,
For example, even if a large number of files are already stored and only a narrow storage space remains, the files can be stored smoothly.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION In the cover sheet with an adhesive shown in FIGS. 1 to 4, the front sheet 1 is made of a polyolefin resin such as polyvinyl chloride resin, polyethylene resin, polypropylene resin, polyethylene-polypropylene resin, etc. The back sheet 2 and the back sheet 3 connected to the back sheet 2 are integrally formed of an opaque material such as paper or synthetic resin. The front sheet 1 is preferably made of polypropylene resin, which is relatively lightweight and inexpensive, and is preferably made of a transparent material, but may be made of another semitransparent material. .

Also, the back sheet 2 of the cover sheet with the adhesive is provided.
And the back sheet 3 are the first folds 4 which bulge outward
Further, the back sheet 3 has a connecting sheet 6 connected to the front sheet 1 via a second fold portion 5 that bulges outward.

Then, a thick first adhesive layer 7 made of a hot-melt adhesive is formed on the inner surface of the back sheet 3, and a thin second adhesive layer made of a hot-melt adhesive is formed on the inner surface of the connecting sheet 6. 8 are formed over substantially the entire length, and the second
The outer surface of one end of the front sheet 1 is bonded to the adhesive layer 8.

In the cover sheet with the adhesive thus constructed, according to the present invention, one end (hereinafter referred to as one side) and the other end (hereinafter referred to as other side) of the front sheet 1 are connected to the back sheet 3. The space is curved so as to separate from the back sheet 2.

Specifically, as shown in FIGS. 1 and 2, the front sheet 1 extends outward from the back sheet 2 from one side edge on the back sheet side to the other side edge of the front sheet 1. The curved shape is formed so as to form an arc, and if the material used as the front sheet 1 can be obtained by being wound in a roll shape, the curved shape is directly passed through the warping roll, It may be used as it is in an arc shape having a radius of curvature corresponding to the roll diameter, and when the material used as the front sheet 1 is a continuous sheet that extends straight in a plane, the continuous sheet is It is bent by a roll forming machine which can form a curved shape in which book rolls are arranged in a cross shape. It is practically preferable that the curved shape is an arc shape having a radius of curvature of 50 mm to 1050 mm, preferably 150 mm to 950 mm. As described above, the material used as the front sheet 1 is rolled up. In this case, it is preferable to use a material wound roll having a diameter of 1000 mm to 250 mm.

Next, the operation of this embodiment will be described.

Since the first adhesive layer 7 is formed on the inner surface of the backsheet 3 of the adhesive-attached cover sheet constructed as described above, it is possible to bind paper sheets such as catalogs and plan sheets at the office, or at home. In the case of binding paper sheets such as documents to be stored in, the front sheet 1 and the back sheet 2 are erected with respect to the back sheet 3 as shown in FIG. One side edge of each paper sheet by applying one side edge of a paper sheet such as a catalog and heating the outer surface of the spine sheet 3 with an electric heater such as a hot plate to melt the first adhesive layer 7. The edges can be buried in the first adhesive layer 7 to some extent so as to be bonded, and bookbinding can be performed by curing the adhesive of the first adhesive layer 7.

By the way, in the case of binding a paper sheet on which printing with relatively weak ink receptivity such as perforated plate printing is bound, the components in the ink printed on the front cover (first page) of the paper sheet. Shift to the back side of the front sheet 1 and try to warp in a direction away from the back sheet 2 as going from one side of the back sheet side to the other side of the front sheet 1, the front sheet 1
Since the intermediate portion thereof is curved in advance in a direction in which it separates from the back sheet 2, it can withstand such a warp and does not cause a warp.

Moreover, the front sheet 1 has such a shape that the back sheet side and the other side of the front sheet 1 gradually come closer to the back sheet 2 toward the edge thereof. Even if a large number of files have already been stored and only a narrow storage space remains, they can be stored smoothly.

In this embodiment described above, as shown in FIG. 4, in addition to the first adhesive layer 7 and the second adhesive layer 8, the back sheet 2 has a thin-walled end portion on the back sheet side. A third thin adhesive layer 9 is formed on the third adhesive layer 9 of FIG.
The folds 4 and the second folds 5 may be reinforced.

[0018]

As described above, according to the present invention, since the middle portion of the front sheet is curved in advance in the direction of separating from the back sheet, printing with relatively weak ink inking property can be performed. When the applied paper sheets are bound, the components in the ink printed on the cover sheet (first page) of the paper sheets are transferred to the front sheet, and the front sheet is connected to the back sheet from one end to the other end. Even if it tries to warp so as to separate from the back sheet as it goes toward the portion, it can withstand such a warp, does not cause a warp, and does not cause a problem in handling, organizing and storing files.

Moreover, the front sheet has a shape such that the other end away from the back sheet gradually comes closer to the back sheet toward the edge thereof. Therefore, when storing files, for example, a large number of files are already stored. Even if there is only a narrow storage space left, it can be stored smoothly.

[0020]

[Brief description of the drawings]

FIG. 1 is a perspective view of a cover sheet with an adhesive according to the present invention.

FIG. 2 is a sectional view of a cover sheet with an adhesive according to the present invention.

FIG. 3 is an enlarged cross-sectional view of a front sheet folded on a back sheet.

FIG. 4 is an enlarged sectional view showing another embodiment of the present invention.

[Explanation of symbols]

 1 Front sheet 2 Back sheet 3 Back sheet 7 Adhesive layer

Claims (1)

(57) [Claims] 1. A front sheet made of a synthetic resin, a back sheet facing the front sheet, and a back sheet connecting the front sheet and the back sheet, wherein a hot-melt adhesive is used for the back sheet. In the cover sheet with an adhesive provided with the adhesive sheet, the front sheet is curved so that a distance between one end and the other end connected to the spine sheet is separated from the back sheet. A cover with adhesive.