JPS5935425Y2 - Book cover - Google Patents

Description

[Detailed description of the invention] This invention relates to a book cover, and its purpose is to make the title of the book easier to read by covering at least the middle part of the cover, which corresponds to the back of the book, with a transparent or translucent heat-shrinkable plastic film. Another object of the present invention is to provide a book cover in which the film is heat-shrinked after the cover is attached to the book.

1 Conventionally, papers such as Hatron paper and paraffin paper, or transparent or translucent plastic films or sheets have been used for book covers.

However, with paper books, the title printed on the cover, especially the back, cannot be seen, so when the book is placed on a bookshelf, the name, author, etc. of the desired book cannot be determined unless the cover is removed each time.

Additionally, some books have a blank space on the back to write the title of the book, but it is cumbersome to fill in that space.

In addition, plastic films and sheets are generally used for thick books, dictionaries, etc., but when purchased at a bookstore, they must be placed in a paper bag or wrapped in wrapping paper instead of attaching a service cover. There is.

In view of the above circumstances, the present inventor devised a book cover in which at least the back surface of the cover is made of a transparent or translucent thin film, and filed a separate application for utility model registration.

This invention uses heat-shrinkable plastic film as a transparent or translucent thin film to create a book cover that is easy to see the contents, easy to install, and has universality regardless of the thickness of the book. It was a selfish act.

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

Figure 1 shows an example, 1-1 is a plan view, 1-
2 is a sectional view.

A paper book cover 1 is made of a transparent or semi-transparent heat-shrinkable plastic film 3 at least in the horizontal middle part corresponding to the spine of the book, which is pasted on the paper surface with adhesive or the like, and both ends 2 are folded back. It is what you use.

The vertical width of the plastic film 3 is the same as the vertical width of the paper, but the horizontal width is usually in the range of about 1 to 5 cm, and can be adapted to any width of the back of a book (about 1 to 5 cm).

In other words, the book cover 1 is attached to the book using the folded part 2.
When the back of the book is heated for a few seconds after being folded back, the heat-shrinkable plastic film 3 heat-shrinks mainly in the width direction, tightly covering the back of the book.

The transparent or translucent heat-shrinkable film is preferably a uniaxial shrink film that mainly shrinks in the width direction of the book, and preferably has a thickness of about 20 to 40 μm, such as electron beam cross-linked polyethylene, polyvinyl chloride, or stretched polypropylene film. .

Also, coloring. Or it may be uncolored.

Thermal shrinkage rate is low in the vertical direction, and uniaxial shrinkage in the horizontal direction is about 10
Those exhibiting a shrinkage rate of ~80% are preferred.

To heat-shrink the film by applying the back side of the graft with the cover attached, use an elastic body such as elastic rubber as a heat medium placed on a hot plate installed on the top of a 20W heater, for example, and It is preferable to use a device capable of heat shrinking by pressing at 150°C, preferably 70 to 100°C for several seconds.

In addition, the folded portion 2 may be formed by folding both ends of the lower part of -L, or may be formed into a bag shape.

Figure 2 shows another example in which the folded part 4 is made of stretch film and both ends are formed into a bag so that it has elasticity or elasticity, making it easy to attach and prevent it from coming off. It is.

Fig. 3 shows another example in which the folded part 5 is made of an elastic stretch film in the same way as in Fig. 2, and both ends are formed into a bag shape, and the folded part 5 is made even more flexible. be.

FIGS. 2 and 3 are preferred embodiments when the cover of the book is thick.

Note that the folded portions 4 and 5 shown in FIGS. 2 and 3 may be made of heat-shrinkable plastic film in the form of a bag.

In this case, the heat-shrinkable film shrinks when the bag part is heated for a few seconds in the same way as film 3, which covers the spine, and covers the book cover tightly and becomes difficult to remove.

It is most preferable to use a film such as stretched electron beam cross-linked polyethylene as the heat-shrinkable plastic film 3, since the part corresponding to the back of the book is elastic when the book is opened and closed, and can absorb the thickness of the book. This is an embodiment.

As mentioned above, the book cover of the present invention uses a heat-shrinkable transparent or translucent plastic film for the middle part of the back of the book. It is more universal and can be used regardless of the thickness of the book than those made of plastic film, cellophane, etc., or even those made of thin plastic film.

Therefore, they are excellent in terms of sales services, proof of payment, and packaging services at bookstores.

Moreover, heat shrinking is easy, and the back of the book is easy to see.
This book cover has excellent protection, is easy to install, and does not easily come off, making it a particularly preferred book cover for practical purposes.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing an embodiment of the present invention, 1-1 is a plan view, 1-2 is a sectional view thereof, and Figs. 2 and 3 are plan views showing other embodiments. be. 1...Paper cover, 2. 4. 5...
- Folded portion, 3...Heat-shrinkable plastic film.

Claims (4)

[Scope of utility model registration request] (1) A book cover made of paper, characterized in that at least the middle part of the book cover, which corresponds to the back of the book, is made of a transparent or translucent plastic film having heat-shrinkable properties. (2) The book cover cover according to claim 1, wherein the heat-shrinkable plastic film shrinks mainly in the lateral direction of the book cover cover. (3) The book cover according to claim 1 or 2, wherein the folded portion of the paper book cover is made of elastic stretch film in the form of a bag. (4) The book cover according to claim 1 or 2, wherein the folded portion of the paper book cover is made of a bag-shaped heat-shrinkable plastic film.