JPS5924694A - Manufacture of covers - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention has a printed pattern on the surface of a paper sheet, [1
This pattern]-0 is overlaid with a transparent film and integrated into 1
This invention relates to a manufacturing method for providing pockets on the round surfaces of book jackets, folded map covers, posters (hereinafter referred to as covers), and especially such covers.

A transparent synthetic resin sheet is used to protect books and folded maps, and this synthetic resin sheet has a folded part at one or both ends, and one or both edges of the folded part are welded to the opposing and overlapping side edges, and then folded. Some sections have pockets into which the side edge of a wooden cover or a folded map can be inserted.

By the way, if the sheet is made of paper and has a beautiful printed pattern on its surface, and the patterned surface is laminated with a transparent film, but a pocket is to be provided on the back side, a synthetic resin film to be used as the pocket is layered on the back side of the paper sheet. Although the side edges will be glued to the paper sheet, the pockets formed will easily peel off.

The present invention solves the above-mentioned problems of a method for forming a pocket on the back side of a cover material made of a paper sheet having a printed pattern on the surface and protecting this patterned surface with a transparent film. The point is to prevent the pockets from coming off.

The structure of the present invention is such that a transparent film layer that protects the printed pattern formed on the surface of a paper sheet is extended and protruded from one end of the paper sheet, and is folded back to the back side, and the side edges of the folded film are connected to the front film layer. It is welded with.

Embodiments of the present invention will be described below with reference to the drawings. A indicates a folding map cover, which is an example of covers obtained by the method of the present invention, and 1 is a paper sheet with a printed pattern on the front side. Although this pattern is formed, illustration of this pattern is omitted.

The printed pattern portion is protected by a transparent film 2. 3 is an adhesive layer for fixing the film 2 to the paper sheet.

A pocket 4 is formed at one end of the back surface of the paper sheet.

Next, an example of a method for manufacturing this cover will be explained.

For example, the film 2 stacked on the paper sheet 1 has a thickness of 8
It is made of a thermoplastic frill synthetic resin such as vinyl chloride resin with a thickness of about 0μ, and both side edges a are 2 to 3 mm from both sides of the paper sheet 1.
Its width is set so that it protrudes by mm, and it extends from one end of the paper sheet by a length equal to the depth of the pocket 4 to be formed. The adhesive layer 3 is a synthetic resin-based material that is welded to the film 2 and has adhesive properties to the paper sheet. It is applied to the paper sheet in advance, and if necessary, the paper sheet and the synthetic resin are bonded to the paper sheet before the adhesive is applied. Apply an adhesive that has adhesive properties in advance.

The paper sheet 1 and the film 2 are bonded and integrated by passing between hot press rolls. The heating temperature with the hot press roll is kept to a level that softens the film, and the film is pressed under heating to weld and integrate.

Next, the part of the film that extends and protrudes from one end of the paper sheet 1 is folded back to the back side of the paper sheet, and is again passed between press rolls heated to the softening temperature of the film, so that the overlapping film protrudes from both sides of the paper sheet 1. Edge a is welded and integrated.

The film edge that partially protrudes from the side edge of the paper sheet may be only one side edge.

Also, if the cover is a book jacket, pockets may be provided at both ends.

The bonding and integration of the paper sheet and film can be done by placing paper sheets coated with adhesive at a predetermined interval on the endless film and passing it through a press roll. In this case, the film is cut at a portion that coincides with one end of the paper sheet after passing through the press roll.

After welding the overlapping film edges together, the single protruding edge that does not overlap can be cut off.

The illustrated cover A is shown with the protruding edges of the above-mentioned layers removed.

This invention is as described in "-", and this manufacturing method is such that the transparent film that protects the printed pattern on the paper sheet is rp whose 1j can be slightly protruded from the side edge of the paper sheet. As a protruding length extended at one or both ends? The film is made of a thermoplastic synthetic resin, and the adhesive applied to the surface of the paper sheet is also a thermoplastic synthetic resin. A beautiful film layer can be formed without any expansion or contraction, and the overlapping parts on both sides of the folded part of the film are also heated and pressed at the softening temperature of the film, resulting in a beautiful finished pocket. The film is welded and the bottom of the film is not welded, which means that there is no problem of pockets coming off, which is the case with conventional films that are made by stacking different films to form pockets. be.

[Brief explanation of the drawing]

Figure qlll-1 is a front view of a folding map cover as an example of covers obtained by the method of the present invention, Figure 2 is a rear view of the same, and Figure 3 is a partially cutaway enlarged sectional view of the same. A...Cover, 1...Paper sheet, 2...Film,...Extended protruding part, d...Film edge, 3...
・Adhesive layer, 4... Pocket patent applicant Okui Co., Ltd. Agent Kama 1) Bun 2

Claims (1)

[Claims] A thermoplastic synthetic resin adhesive is applied to the printed patterned surface of the paper sheet, a transparent thermoplastic synthetic resin film is layered, and the paper is heated to a softening temperature and pressurized to integrate.
The side edge of the film is slightly protruded from the side edge of the paper sheet, and the film is protruded from one end or both ends of the paper sheet by a required length, and this protruding portion is folded back to the back side, and the side edge of the folded portion is A method for manufacturing covers, characterized in that the side edges of a film protruding from the side edges of a paper sheet are integrated with the side edges of a paper sheet by heating and pressing.