JPS5819558Y2 - Electrophotographic device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a wet electrophotographic engraving machine for producing masters for use in offset printing machines.

Conventionally, there are two types of devices for producing masters used in printing presses: a copying device that copies a manuscript onto a master master plate, and an etching device for the copied master master, both of which are not linked to each other. In the former case, workability is poor because the devices are separate, and in the latter case, the effect of nipping is related to the time elapsed after etching, so it is left for a long time after etching. I can't do it,
Therefore, it is good if the time required for plate making and the time required for printing are well-balanced, but it has the disadvantage that if, for example, the printing machine breaks down, the plate making work must be stopped.

This invention relates to a wet-type electrophotographic plate-making machine that can perform the copying process without stopping even if printing is not performed immediately after plate making, and can also perform the copying process and the etching process in succession if necessary.

This invention will be explained below based on embodiments shown in the drawings.

FIG. 1 shows a wet-type electrophotographic engraving machine according to this invention. 4, an exposure section 8 is provided at the position where the light from the exposure rung 5 hits the original, is reflected, and is further sent through the reflection mirror 6 button and the optical system I, and a development section 9 is provided below the exposure section.
A conveyor 11 is provided which extends from the developing section 9 to a heater part 10, and a conveyor mechanism 12 is further provided between the heater part 10 and the discharge port.

The etching device 3 is provided with a manual feeding port 13 and a receiving port 14 adjacent to the transport mechanism 12,
As shown in the figure, a switching mechanism 15 that can switch between the solid line and the dotted line state is provided between the discharge port of the etching device 3 and the receiving port 14 of the etching device 3. It can be switched to

Each transport member 11.12 is also provided with a fan 18.

Next, the operation of the above will be explained.

When an original is placed on the original table 4 and an operation switch (not shown) is pressed, the master original 16 is charged by the charging device 17 and reaches the exposure section 8, after which the light from the exposure lamp reaches there. Expose the original image onto the master plate.

The exposed master original plate passes through the developing section 9 and is sent to the heater part 10 by the conveyor 11, where it is dried and fixed.

This heater portion 9 is activated when the leading edge of the master original passes the first photo sensor 23, and is stopped when the rear end of the master original passes the second photo sensor 24.

The fixed master original is further sent to the discharge port by the conveying mechanism 12, where, for example, when the switching mechanism 15 is positioned as shown by the solid line, the fixed master original is stored on the pedestal 22.

Further, when the switching mechanism 15 is positioned as shown by the dotted line, the master original plate after fixing is sent to the etching device 3, etched, and then stored on the receiving stand 22, so that it can be used in the printing machine at any time. It is.

Furthermore, since the etching device 3 is provided with a manual feed port 13, when the switching mechanism 15 is positioned as shown by the solid line, the fixed master original stored on the pedestal 22 can be inserted therein. This master plate is etched and becomes a master that can be used in a printing press.

Several balls 19 are provided at the top of the transport conveyor 11 button and transport mechanism 12 so that when the master original is being transported, the balls 19 are in contact with the surface of the master original, so that the master original after development is pulled. In addition, the conveyance speed of the conveyance mechanism 12 on the ejection port side of the copying device 2 and the rotation speed of the roller 21 of the etching device 3 can be independently varied. In order to avoid any inconvenience even if there is a speed difference between the etching parts, when the longest master original is caught in the roller 21 of the etching device 3, its rear end passes through the heater part 10. .

This device is configured as described above, so that if printing is not done immediately after plate making, the etching can be ejected without performing etching, and etching can be carried out as necessary. It is also possible to carry out the process from plate making to etching residue continuously, and it has excellent effects such as consistently obtaining printed matter with a good print finish and improving work efficiency.

[Brief explanation of the drawing]

The figure is a schematic layout diagram showing each part inside the plate-making machine according to this invention. 1... Plate making machine, 2... Copying device, 3.
...Etching device, 8...Exposure section, 9
...Developing section, 10... Part of the developer, 11
...Transport conveyor, 12...Transport mechanism, 13...Manual feed port, 15...Switching mechanism, 16...Master original plate, 17・・・・・・
Charging device, 19...Ball, 22...
cradle, 23, 24...photo sensor.

Claims (1)

[Scope of utility model registration request] An electrophotographic engraving machine for producing an original plate for an offset printing press, comprising a copying device for copying an image of a document onto a master original plate, and an etching device for receiving and etching the copied image, wherein the etching device A master original plate holder is provided below the copying device and the etching device, and a switch is provided between the copying device and the etching device to enable switching between a position where the master original plate is fed into the etching device and a position where the master original plate is discharged to the master original plate holder. An electrophotographic engraving apparatus characterized in that the etching apparatus is provided with a mechanism and a manual feeding port is provided in a master original receiving port of the etching device.