JPH02110526A - Picture marking device for diazo-copying machine - Google Patents

Abstract

PURPOSE:To obtain a copy picture with a mark even when marking is not executed for a lot of originals in each time by adding the mark, whose permeability is different from that of a cylinder, to the cylinder outer surface of an exposing part. CONSTITUTION:On the outer circumferential surface of a cylinder 4, a mark 14, whose permeability is different from that of a cylinder glass, is added near an edge part. In the part of this mark 14, a light from a mercury lamp 3 goes to be weak in comparison with a part, in which there is no mark 14, regardless of the presence and absence of a picture on the original. Accordingly, the photo- sensitive body of a photo-sensitive paper 13 remains more than at a base part and in the case of development, the mark remains as a copy mark 15 on the copy picture. According to the level of shielding quantity, a line or a character, etc., on the copy picture appears more darkly than the copy mark 15. Thus, the mark can be added to all the copy pictures, which need the mark, without consuming labor to mark the original itself.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a diazo copying machine, and more particularly to an image marking device for marking a predetermined mark on an image.

[Conventional technology]

In a diazo copying machine that places an original on photosensitive paper, inserts it through an insertion slot on the table, and transfers the original image onto the photosensitive paper in the exposure section, a mark is placed on the copied image to distinguish it from others. There are times when you want to.

Hitherto, no diazo copying machine has been equipped with an internal mechanism that allows arbitrary marks to be placed on a copied image.

Therefore, when a mark needs to be placed on a copied image, the mark is obtained by printing a mark on the original or stamping the original.

[Problem to be solved by the invention]

Therefore, in the past, it was necessary to mark all documents that needed to be marked, which was a disadvantage in that it was time-consuming.

SUMMARY OF THE INVENTION An object of the present invention is to provide a diazo copying machine that can obtain marked copy images without marking a large number of originals each time.

[Means to solve the problem]

For this purpose, the present invention is characterized in that a mark having a transmittance different from that of the cylinder is attached to the outer surface of the cylinder in the exposure section.

[Effect]

In the present invention, the exposure section is equipped with a cylindrical glass on which markings with different pass rates are applied using, for example, the Sand Plus method, so that marks can be placed on all copy images that require marks.

〔Example〕

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

FIG. 2 is a schematic mechanical diagram of a diazo copying machine to which the present invention is applied, in which an original is superimposed on photosensitive paper and a table l
Insert it into the machine from the upper insertion slot.

The originals and photosensitive paper inside the machine are transported to printer belt 2.
transported by. Then, when light is irradiated by an exposure section consisting of a mercury lamp 3 and a cylinder 4,
The photoreceptor that overlaps the non-image portion (background portion) of the original is blown away by the light, and the photoreceptor on the photosensitive paper corresponding to the image portion on the original remains as a latent image. The original and photosensitive paper that have left the exposure section are absorbed and separated by an original separation tank 5 and a print suction tank 6, respectively. Then, the original is discharged to the original receiver 7, while the photosensitive paper passes through the developing section insertion guide plate 8 and reaches the developing tank 9, where it reacts with ammonia and develops color. The image is then fixed by the iron roller IO and discharged to the copy receiver 11. 12 is a blower.

FIG. 1 is a diagram showing how marks are placed on the photosensitive paper 13. In the present invention, marks 14 having a different pass rate from the cylinder glass are placed on the outer circumferential surface of the cylinder 4 near its end.

This mark 14 is made by cutting out a pattern or other arbitrary shape on the outer surface of the glass, and using the Sand Plus method, which scratches the glass surface by spraying fine sand on top of it, or by using a cylinder with transparent ink. It is formed by marking the surface.

In this mark 14 part, the light from the mercury lamp 3 is weaker than in the part without the mark 14, regardless of whether there is an image on the document, so more of the photoreceptor of the photosensitive paper 13 remains than in the background part, and during development. A copy mark 15 remains on the copied image. Depending on the amount of light shielding, lines, characters, etc. on the copy image appear darker than the copy mark 15.

By making the copy mark 15 a halftone image, it can be made so that it does not affect the reading of the copy image.

〔Effect of the invention〕

As described above, according to the present invention, all necessary copy images can be marked without taking the trouble of marking the original itself. Furthermore, if the image is a halftone image, it is possible to apply marks that do not affect the discrimination of lines, characters, etc. on the copy image.

Therefore, the owner of the copy and the location where the copy was made can be made clear, the management of the copied drawings can be strengthened, and leakage of confidential information can be prevented.

[Brief explanation of the drawing]

FIG. 1 is an external view of a cylinder and photosensitive paper showing the main parts of the present invention, and FIG. 2 is a schematic mechanical diagram of a diazo copying machine to which the present invention is applied. 4... Cylinder surface 1st figure 2nd figure.

Claims (1)

[Claims] An image marking device for a diazo copier, characterized in that a mark having a transmittance different from that of the cylinder is attached to the outer surface of the cylinder in the exposure section.