JPS5836537Y2 - Shashinshiyokujikiyoumojiban - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved dial for a phototypesetting machine.

In order to improve typesetting in phototypesetting machines and prevent operator eye fatigue, the non-printing areas on the dial surface of the dial are made white or a light color close to white and light-diffusing. A dial in which characters are written using diffused light in the non-printing area has already been proposed (Japanese Patent Application No. 48-107158 filed by the present applicant; Japanese Patent Application No. 48-1
07159).

Such a dial has excellent effects such as being able to see the characters positively when writing characters, even though the actual dial is negative, and eliminating glare.

However, even if a dial has such a non-printing area, the light blocking effect of the non-printing area is sufficient for normal typesetting, but it is often used in numerals, mathematical typesetting, chemical symbol typesetting, etc. When exposing the same area of a photosensitive object multiple times, the light blocking effect may be insufficient and the photosensitive object may be exposed to light, or if the light source for photography is a flash lamp, the light blocking effect provided by the non-image area may be insufficient. However, since strong light is emitted instantaneously, a considerable amount of light may pass through the non-image areas around the characters being photographed, and the operator may be dazzled. Although it is an easy and economical method, there are cases where it is difficult to put it into practical use and cannot be adopted.

The present invention provides two layers of character film surfaces that are transparent in the character print area and white or a bright color close to white in the non-character print area and that have light diffusing properties, and furthermore, a character film surface is provided between these two layers of character film surfaces. It is an object of the present invention to solve the above-mentioned drawbacks by providing a dial for a phototypesetting machine which is provided with a light-shielding layer corresponding to the non-character printing line area.

To explain using a diagram, in FIG. 1, a character film surface 2 having a non-printing area of white or a light color close to white is applied on the upper part of a substrate 1, and a protection plate 3 is further provided to protect the character film surface 2. It is provided.

The light shielding layer 4 is provided on the lower side of the character film surface 2 so as to correspond to the non-image area.

This light-shielding layer 4 is an auxiliary layer to increase the light-shielding property, and since the character film surface 2 acts as the film surface for photographing,
It may be slightly smaller than the non-printing area of the character film surface 2, and therefore does not require much precision.

This improves the light-shielding properties of the non-image areas, eliminating the possibility that the operator will be dazzled or that the photosensitive material will be exposed to light transmitted through the non-image areas during multiple exposure.

Below this light shielding layer 4, a character film surface 5 similar to the character film surface 2 is further provided.

These two character film surfaces 2 and 5 both diffusely reflect the light beam irradiated onto the non-character image area, and transmit light through the character image area.

As a result, the operator sees only the light diffused and reflected by the non-character image area, and perceives the non-character image area to be bright and the character image area to be dark.

Since two layers of such character film surfaces 2 and 5 are provided with the light-shielding layer 4 in between, if this is done, the dial can be used for reverse printing on a photoreceptor due to necessity due to differences in printing plate types. Contrary to the above case, even if the card is loaded upside down, there is no problem because characters can be written using the character film surface 5 in the same way as in the normal case.

In addition, by making the non-printing parts of the character film surfaces 2 and 5 that correspond to the boundaries in terms of character classification transparent in the form of lines 6, etc.,
It is also possible to use the light-shielding layer corresponding to this portion as a heading line when writing characters.

The light-shielding layer used in the present invention is not limited to one having a complete light-shielding property, but also varies depending on various printing conditions in a phototypesetting machine (for example, light-shielding properties of non-image areas on the character surface, characteristics of the photoreceptor, properties and light intensity of the light source, etc.). There are no restrictions on the material or color of the light-shielding layer, the method of applying the light-shielding layer, etc., as long as the light-shielding property is above the minimum required level, taking into account the possibility of multiple exposures of the same area of the photosensitive material, etc. It is clear from the purpose of the present invention that this is not the case.

Furthermore, the phototypesetting machine referred to in the present invention includes an optical automatic drafting machine and a ruling machine.

As described above, the present invention improves the light-shielding property by applying a light-shielding layer between the two layered character film surfaces having non-printing areas of white or a light color close to white to supplement the light-shielding property. It prevents the lack of light shielding in non-image areas during multiple exposure, almost eliminates glare even when the light source for photography is a flash lamp, and if the light shield layer is made of a greenish color, it will be easier for the operator's eyes. It also has the effect of protecting the.

Furthermore, since the character film surface is made up of two layers, the light-shielding property of the non-image area can be increased accordingly, and the light-shielding layer 4 can be used as an auxiliary layer.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a dial for a phototypesetting machine showing an embodiment of the present invention. 1...Substrate, 2...Character film surface, 4...
...Light blocking layer.

Claims (1)

[Claims for Utility Model Registration] Two character film surfaces in which the character print area is transparent and the non-character print area is white or a light color close to white and light diffusive.
What is claimed is: 1. A dial face for a phototypesetting machine, comprising: a light-shielding layer provided between the character film surfaces of the two layers in correspondence with the non-character image line area;