JPS6215812Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a draft for designing an input/output form for a computer or the like.

A design version of a computer's input/output form, that is, a sketch designed from a manuscript, requires precision higher than the required precision for the input/output form, that is, 1/10 mm. For this reason, the sketching material used for the block copy is required to not expand or contract, to hold the ink well during inking, and not to bleed. The materials to satisfy this condition are:
Conventionally, as shown in FIG.
A core is used, and papers 2, 2, which serve as writing surfaces, are stacked in a sandwich pattern on the front and back sides of the core.

However, in the case of such sketch materials, since the writing surface is composed of paper 2, 2, the edges smear when inking, so it is difficult to solve the problem of smearing. Moreover, since it has the above-mentioned sandwich structure, it has the disadvantage of being expensive in terms of materials.

Furthermore, with the above-mentioned sketch material, ruled lines or characters for indexing the form are written on the writing surface and then photographed with a camera to create an original board, but the above-mentioned computer Because of the precision required for input/output forms, normal cameras have dimensional errors due to aberrations, and a device to correct them is required, making the camera itself large.

Therefore, this idea consists of a transparent resin film and has a matte finish on its surface.
The present invention provides a film for printing plates, which has indexing scales and ruled lines printed with ink of a color that is not sensitive to light-sensitive materials, so that there is no ink smearing when drawing is performed. Since a light-transmitting film is used, the purpose of this method is to make it possible to take a picture of the film as it is with a transmission-type camera to create an original form of a form.

An embodiment of this invention will be described below in detail with reference to the drawings.

FIG. 2 shows a cross section of a film for printing plates according to this invention. This film for printing plates 10 is made of a material that has relatively little thermal expansion, such as polyethylene film or polyester film (Mylar film). A matte processing part 11 is formed on the upper surface of this film for printing plate 10, and the matte processing part 11 is formed with fine irregularities on the surface. It is designed to provide writing quality for inking. Furthermore, on the surface of the above-mentioned printing film 10, ruled lines 12 are printed vertically and horizontally as shown in FIG. 3, and although not shown, indexing scales, etc. are printed near these ruled lines. . These ruled lines 12 and scales are printed with printing color ink that is not sensitive to the photosensitive material, for example, yellow or red ink when the material constituting the plate printing film 10 is a regular type or ortho type film. However, in the case of such a printing color, the eyes are easily tired, so it is desirable to use a low-sensitivity film and print with pale blue ink as the printing color. If a frame or characters, etc. are drawn on the top according to the ruled lines 12 and the scale, and this is photographed in a transparent manner, the ruled lines 12 and the scale, etc. are constructed so as not to appear at all on the photographed original plate. ing.

When designing, for example, a computer input/output form using the drafting film configured as described above, the ruled lines 12 are referenced from the original according to the size and frame shape of the original. Inking is performed on the printing film 10, but in this case, compared to the above-mentioned conventional case where the writing surface is paper,
When inking, the edges can be drawn well without blurring at all. In addition, with the inked manuscript in this way, transmission photography, that is, close-up photography is possible, eliminating the need for a camera for plate making, and eliminating errors caused by lens aberrations caused by this camera for plate making. , it is possible to create a master plate with extremely high precision.

As for the type of transparent synthetic resin film mentioned above, as mentioned above, by selecting from materials with extremely low thermal expansion, the accuracy is guaranteed to be within 1/100 mm at room temperature, and this makes it possible to maintain the accuracy of the computer input. It is possible to create a block with a precision higher than 1/10 mm, which is required for output forms.

As explained in detail above, the film for printing according to this invention is made of a transparent resin film, and its surface is subjected to a matte finish, and the film is coated with a printing color ink that is not sensitive to light-sensitive materials. Since it is made by printing scales and ruled lines for drawing out, unlike the conventional aluminum film core with paper laminated on both sides to serve as the writing surface, there is no alignment of the fibers in that area. There is no bleeding due to capillary action, and since a single film is used, the material cost is low.Furthermore, because the film is transparent, it can be used for reflection photography, unlike conventional photography. In other words, instead of composing the master plate using a camera, it is possible to take close-up photographs using a transmission method, so there are no errors caused by lens aberrations, and it is possible to print with high precision compared to conventional film for printing plates. .

[Brief explanation of the drawing]

Fig. 1 is an enlarged sectional view of a part of a conventional sketching material, Fig. 2 is an enlarged sectional view of a part of a film for printing plates according to the present invention, and Fig. 3 is an overall view of the film for printing plates according to the present invention. FIG. 2 is a perspective view showing a schematic configuration. 10...Film for printing plate, 11...Matte processing section, 12...Ruled line.

Claims (1)

[Scope of utility model registration request] 1. A film for printing plates, which is made of a transparent resin film, has a matte finish on its surface, and has indexing scales and ruled lines printed with ink of a printing color that is not sensitive to photosensitive materials.