KR0161000B1 - Method of manufacturing slide for over head projector - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a slide for an overhead projector, wherein the content of the slide is mounted on a transparent paper having a certain thickness (for example, 0.5 mm or more acetate paper, polypropylene or PVC, etc.). And an index table, etc. are integrally printed, and a slide is produced by cutting the binder hole or the rounded part of the corner.

Therefore, since the projection contents 23, 25, 27, 28, the mound part 26, and the index table 24 are integrally printed on the transparent film, the manufacturing process is simplified, economical, and mass production is possible. In addition, the slide according to the present invention has a number of advantages, such as beautiful, solid and high storage, prevents the slide from crushing, and makes it possible to easily produce slides having more than two beautiful projection contents. It is a way to have.

Description

Manufacturing method of slide for overhead projector

Figure 1 (a) is an exploded perspective view of a slide for a conventional overhead projector,

(b) is a perspective view of a completed state of a slide for a conventional overhead projector,

2 (a) to (e) illustrate the steps of manufacturing a slide for an overhead projector according to the present invention,

(a) is a state diagram after the first color printing,

(b) is a state diagram cured after the second color printing,

(c) is a state diagram after silk screen printing only for the mount portion,

(d) is a state diagram after the third and fourth color offset printings,

(e) shows the completed state after the altar.

* Explanation of symbols for main parts of the drawings

1: transparent positive 2: conventional paper mount

3: conventional slide 11: transparent film

12: Copy 14: Ante

15: outer frame 14a, 15a: round part

16 binder hole 17 index table

4: Slide 21 concerning the present invention: Transparent film

22: mount portion 23: first color printing portion

24: index portion 25: second color printing portion

26: opaque printing section 27: third color printing section

28: fourth color printing unit 29: bind hole

The present invention relates to a method of manufacturing a slide for an overhead head projector.

An overhead projector (aka OHP light illuminator) is a device that draws or writes a diagram or comment on a transparent paper of a certain size, places it on a projector, magnifies it with a magnifying glass, and then projects it on the screen with a reflector. Green slides are used to copy and use other textbooks in order to use them as regular audiovisual materials in schools, corporations, and government offices.

However, in general, since the transparent base is thin and has no power and the edges are not easy to see visually, the transparent base is opaque and thick as shown in FIG. The material is wrapped around the mount.

Conventionally, the projection quantum 1 is manufactured by copying or hand-drawing a desired figure or description (hereinafter referred to as projection content) 12 onto a relatively thin transparent film 11 using a general copier or the like, and on the other hand, It is made of paper with a mount (2) as in FIG. 1 (a), the mount consisting of an antenna (14) and an outer frame (15) of the same shape, and on one side of the antenna an index table representing a list of slides ( 17) Attach. In addition, the left side of the mount 2 is drilled through the binder hole 16 so as to be able to bind to the binder, and the other corner portion is provided with round portions 14a and 15a. Afterwards, the inside of the paper mount is pasted, and the positive film 1 is sandwiched between the antenna 14 and the outer frame 15.

Therefore, the film 11 is cut to an appropriate size to copy the projection 12, and the antenna 14 and the outer frame 15 are cut and pasted to the edge of the film, and the index table 17 is attached to the edge of the antenna 14. Since the process of attaching to one side has to go through several steps, the manufacture of the above slides is very complicated, mass production is impossible and it is never desirable in terms of cost. In addition, since the mount 2 is attached to the edge of the positive film 1 using an adhesive, there is a problem that the film is shriveled after manufacture, and the slide 3 is placed on the projection surface of the projector and continues to be used. Since the thermal expansion rate of the rim of the thick paper and the thin film is different because of the heating, the phenomenon of crushing the film becomes more severe as described above, and there are many problems in storage or aesthetics. In addition, in the conventional method, in order to have two or more colors, only the outline of the projection content is copied, and the margin parts are painted by hand, so that the working speed is slow and the color is uneven.

The present invention is to solve the above problems, the projection content on the transparent synthetic resin (for example, 0.5mm or more acetate paper, polypropylene or PVC, etc.) having a certain thickness, the projection portion, the mount portion and the index portion, etc. It is an object of the present invention to provide a method of manufacturing a slide by integrally printing and cutting a binder hole or a corner round part.

On the other hand, as a special printing for printed layers other than paper, gravure printing is mainly used as a printing method for plastic printing such as vinyl printing, polyethylene printing or polypropylene printing, and offset printing or flexography Silkscreen printing is used. In other words, since synthetic resin is non-absorbent to ink, resin and its solvent are contained in ink so that printing ink is easily adhered, so that the surface of vinyl etc. is expanded by using solvent to fix pigment and heat-dried by infrared rays after printing. . Alternatively, UV (ultraviolet) ink is a quick-drying ink which is printed as a light-curable vehicle ink and then dried by curing ultraviolet light by applying ultraviolet light, which is widely used in metal printing and the like. ), Monomers, pigments, photoinitiators and other auxiliaries.

Among the special printing methods using the synthetic resin as the printed layer, polypropylene printing ink or UV ink has elasticity and is suitable for printing on flexible synthetic resin and printing of projection contents, but because of its low density, it is translucent printing and is opaque. The printing method of the mount part should be inadequate, whereas the silk screen printing method can print thick with opaque ink, but it is hardly adhered to synthetic resin such as transparent film, and it is also hard. If used directly, there is a risk of falling out of pieces.

However, silk screen printing is also well adhered to the polypropylene printing layer or the UV printing layer. Therefore, in order to realize the projection portion and the index portion of the mount portion in one film, the projection contents and the index portion may be offset by the offset printing method. Translucent by polypropylene printing or UV printing, and the mount part is offset printing by polypropylene printing or UV printing first, and then silkscreen printing by using opaque ink for flexo or silk on the second. After coating thickly by the method, it is possible to carry out a kind of coating by polypropylene printing or UV printing again by the offset method on the third time.

Referring to the present invention by the manufacturing process as follows.

[Step 1]

Offset polypropylene printing or UV printing so that the edge of the transparent film 21 cut to an appropriate size for overhead projector slides has the shape of the mounting portion 22 and the projection portion has the desired projection contents 23. The first color having the desired color is also printed by the printing. At this time, the index unit 24 of the mount unit prints various index contents including the page number of the slide being printed.

[Step 2]

The edge of the transparent film for the slide is also performed by offset polypropylene printing or UV printing so as to have the shape of the mounting portion 22 and the desired projection contents 25 on the projection portion, but the desired color is different from that in the first process. The third color also has printing. To date, all the printing surfaces are translucent and the second step can be omitted when the printing is not more than three colors.

[Step 3]

Flexo printing or silk screen printing is performed to have the shape of the mount portion only on the edge of the transparent film for slide, wherein the ink used is opaque for flexo or silk screen, which has good adhesion to polypropylene ink or UV ink. Use ink. Therefore, the printing surface of the projection content is translucent, and the mount portion 26 is in an opaque state. Of course, opaque printing of the mount portion is not performed for the index portion 24 of the mount portion. It is also possible to omit this step if the remarkable opacity of the mount is not necessary.

[Step 4]

The edge of the transparent film for the slide is also performed by offset polypropylene printing or UV printing so as to have the shape of the mount portion 26 and the desired projection content 27 on the projection portion, as in the first and second processes. Second color printing with another desired color is also performed. Therefore, all projection contents are in a translucent state, and the mount portion 26 is coated with a polypropylene ink or UV ink having elasticity.

[Step 5]

The edge of the transparent film for the slide is also performed by offset polypropylene printing or UV printing so as to have the shape of the mounting portion 26 and the desired projection contents 28 on the projection portion. A fourth color printing with a desired color different from that in the fourth step is performed. Therefore, all projection contents are in a translucent state, and the mount portion 26 is made of a kind of recoating with an ink for polypropylene or UV ink having elasticity. In the case of non-four-color printing, the fifth step can be omitted.

[Step 6]

The binder hole 29 is drilled into one side of the mount portion 26 of the slide transparent film, and the other side edge portion is cut to have a round portion 26a. Accordingly, the projection contents 23, 25, 27, 28, the mount portion 26, and the index portion 24 are integrally provided on one transparent film, and the overhead projector slide 4 according to the present invention is completed. In some cases, a separate operation such as coating may be performed.

On the other hand, the various special printing techniques required in the manufacturing process, it is possible to implement the present invention by using a printing technique generally known. In addition, the first, second, fourth, and fifth steps may be offset by the offset method, but the third step is by the silk screen printing method because the printing layer should be printed thickly with opaque ink. desirable. In some cases, the second step or the fifth step can be omitted.

As described above, the manufacturing method of the slide according to the present invention is simplified because the projection contents 23, 25, 27, 28, the mount portion 26, and the index table 24 are integrally printed on the transparent film. In addition, the slide according to the present invention is beautiful, solid and highly storageable, prevents the slide from crushing, and is easy to slide with beautiful two-color projection contents. It is possible to make it in such a way that it has various advantages.

Claims (3)

The shape of the mounting portion 22 is formed at the edge of the transparent film 21 cut into a suitable size, the index portion 24 has various index contents including the page number of the slide being printed, and the desired projection contents ( 23) a first process of printing a first chromaticity having a desired color by means of an offset printing method using a synthetic resin printing ink, and a shape of a mount portion only on the edge of the transparent film for a slide; Silkscreen printing is performed using an opaque ink for silk screen having good adhesion, so that the printing surface of the projection content is translucent and the mount portion 26 is in an opaque state, and the transparent film for slide In order to have the shape of the mount portion 26 at the edge of the projection and the desired projection content 27 at the projection portion, A fourth process of printing a second chromaticity having a desired color by means of an offset printing method using the ink; and a sixth process of drilling the binder hole 29 in one side of the mount portion 26 of the slide transparent film. A method of manufacturing a slide for an overhead projector comprising a projection film (23, 25, 27, 28), a mounting portion (26) and an indexing portion (24) integrally provided on one transparent film. The method of claim 1, wherein after the first process, the resin printing ink is offset so that the edge of the slide transparent film also has the shape of the mount portion 22, and the projection portion has the desired projection contents 25. A second process of printing by a printing method but performing a third chromaticity printing having a desired color different from that of the first process is performed. After the fourth process, the shape of the mount portion 26 is also formed on the edge of the transparent film for the slide. In addition, the projection portion is subjected to offset printing using synthetic resin printing ink so as to have the desired projection contents 28, and the fourth color offset printing is performed to have a different color from those in the first, second and fourth processes. The manufacturing method of the slide for overhead projectors formed by performing the 5th process of performing. On the edge of the transparent film 21 cut into a suitable size, a semi-transparent resin printing ink layer such as UV ink, an opaque ink layer for silk screen having good adhesion to the synthetic resin printing ink thereon, and again thereon The mount portion 26 is opaquely printed so that the synthetic resin printing ink layer is overlaid, the index portion 24 on which various index contents including the page number of the slide being printed are printed, and the mount portion 26 A binder hole (29) perforated on one side of the slide, and the projection portion of the slide (4) is translucent to have a desired color by using a synthetic resin printing ink to have the desired projection contents (23, 25, 27, 28). Offset printing is provided so that the projection content (23, 25, 27, 28), the mount section 26 and the index section 24 are integrally provided on one transparent film. Conical slide.