JPH0443856Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a contact printing device that prints an original plate and a photosensitive material in close contact with each other. Regarding equipment.

[Conventional technology]

As a contact printing apparatus, for example, the one shown in FIG. 9 is known (Japanese Patent Application Laid-open Nos. 154834-1983, 10252-1980, etc.). In this device, a plurality of pallets 10 containing original plates and photosensitive materials are pulled out onto a transparent plate 12, and a carrier 14 is used to transfer the pallets 10 from the pallets 10 to the transparent plate 1.
The original plate is placed on the original plate 2, and the photosensitive material is further placed on the original plate, and then the rubber sheet roller 15 with a rubber sheet wrapped around it is run to cover the photosensitive material and the original plate with the rubber sheet. The original plate and the photosensitive material are brought into close contact by evacuating the space between the original plate and the light-transmitting plate 12, and then the light source 16 is turned on to perform printing. When the printing is completed, the carrier 14 transports the photosensitive material to its discharge section 1.
At step 8, the original plates are each discharged onto the pallet 20 for discharging original plates. The photosensitive material discharged to the discharge section 18 is
The material is reversely discharged onto a belt conveyor 21 and conveyed to a photosensitive material developing machine (not shown).

In the above-mentioned apparatus, as shown in FIG. When holding the original plate 26 by suction, air is blown through the hole 24 to prevent the original plate 26 from being lifted up together with the photosensitive material. By blowing out air, air is sent between the original plate 26 and the transparent plate 12, and the carrier 14 blows air between the original plate 26 and the transparent plate 12.
It makes it easy to peel off.

[Problem that the invention attempts to solve]

In the above-described apparatus, since the original plate 26 and the photosensitive material are placed with their film surfaces in contact with each other, air can pass through between the original plate 26 and the photosensitive material relatively easily, and the photosensitive material is transferred to the carrier 14. It is easy to separate it from the original plate 26 by using the following method. However, since the original plate 26 and the light-transmitting plate 12 are in close contact with each other with completely smooth surfaces, they are not easily separated. Therefore, as described above, air is blown out from the holes 24, but most of the air blown out from the holes 24 is exhausted from the end of the original plate 26 on the hole 24 side, and the air is blown out from the holes 24. It is difficult to peel off the central part and the like. Therefore, especially in automatic printing machines such as the one shown in Figure 9,
There are cases where the original plate 26 cannot be suctioned and held by the carrier 14, and the automatic printing operation stops at that point.

Of course, if a hole 24 is formed in the center of the translucent plate 12 and air is blown out from the hole 24, the original plate 24 can be easily separated from the translucent plate 12. This is not practical because the shadow of the hole 24 is printed onto the photosensitive material. Also,
A hole 24 is provided at the end of the original plate 26 on the positioning pin 22 side and the opposite end, and air is blown out from the hole 24, thereby making the transparent plate 12 of the original plate 26
Although it is possible to make the peeling easier,
Since the size of the original plate 26 is not constant, it is not practical as in the case described above.

[Means for solving problems]

This idea was developed as a means to solve the above-mentioned problems. In a contact printing machine that overlaps an original plate and a photosensitive material on a transparent plate and exposes it from the side of the transparent plate, one end of the transparent plate is used. The present invention provides a contact printing device in which an air blowing section is provided and a means for regulating the air flow blown out from the air blowing section is hinged to a transparent plate.

[Effect]

Due to the regulating means, the air flow blown out from the air blowing section quickly spreads to the center of the original plate, creating a layer of air between the original plate and the transparent plate.
Makes peeling of the original plate easier.

[Example] Hereinafter, an example of this invention will be explained based on Figs. 1 to 7, but the same parts as in Figs. 8 and 9 will be given the same reference numerals and the explanation will be omitted. .

1 and 2 are views showing a first embodiment of this invention, with FIG. 1 being a perspective view of the vicinity of the translucent plate 12, and FIG. 2 being a partial sectional view thereof.

In these figures, reference numeral 30 denotes an air blowing hole, and when the carrier 14 sucks and holds the photosensitive material, air is sucked through the hole 30 to
To prevent the original plate 26 from being lifted up together with the photosensitive material. Further, 32 is an air blowing hole,
When the carrier 14 holds the original plate 26 by suction, air is blown out from the hole 32.
To facilitate peeling off the original plate 26 from the light-transmitting plate 12.

34 is a flexible sheet that is screwed to the translucent plate 12 by fixing one end with adhesive or tape, and has an area large enough to cover the entire upper part of the hole 32. .

Here, the screwing described in this specification does not necessarily refer only to attaching in a rotating manner like a hinge, but as shown in FIG. , including wearing it so that it operates like a valve.

The flexible sheet 34 needs to be thin in order to place the original plate 26 on top of it.
The thickness is preferably about 0.075 to 1 mm.

In the above-described apparatus, when the original plate 26 is peeled from the translucent plate 12 by the carrier 14, air is blown out from the holes 32, and the air blown out by the holes 32 is removed by the flexible sheet 34. It is regulated and flows toward the center of the original plate 26 without being discharged from the end of the original plate 26 on the hole 32 side. Due to this air flow, an air layer is formed between the original plate 26 and the transparent plate 12, and the original plate 26 is easily separated from the transparent plate 12.

FIGS. 3 and 4 are diagrams showing a second embodiment of this invention. In this embodiment, a hole 36 having an area smaller than the area of the hole 32 is bored in the center of the flexible sheet 34 . In this embodiment, when air is blown out from the hole 32, most of the air flows toward the center of the original plate 26, as shown in FIG. , the original plate 26 is replaced with the translucent plate 12.
It can be peeled off more easily.

Furthermore, when air is sucked in through the holes 32, the original plate 26 can be adsorbed through the holes 36 of the flexible sheet 34, as shown in FIG. The air suction hole 30 can be omitted.

In the first and second embodiments described above, when a relatively hard material is used as the flexible sheet 34, the flexible sheet 34 is fixed to the transparent plate 12 with tape, and the tape The flexible sheet 34 may be configured to rotate due to the action of.

5 to 7 are diagrams showing a third embodiment of this invention. In this embodiment, a recess 46 is formed in the translucent plate 12, and a shaft 4 is inserted into the recess 46.
A plate-like member 42 is screwed by screws 4 to 4. In this embodiment, when air is blown out from the hole 32, the plate member 42 rotates from the position shown in FIG. 6 to the position shown in FIG. By flowing in this direction, the same effects as in the first and second embodiments described above can be achieved.

[Effects] Since the contact printing device according to this invention is configured as described above, although it has an extremely simple configuration, it is possible to print the original plate from the transparent plate by blowing air from one end of the transparent plate. It can be removed quickly, especially in automatic printing machines, etc.
It is possible to ensure that the carrier holds the original plate by suction.

[Brief explanation of the drawing]

1 and 2 show a first embodiment of this invention, in which FIG. 1 is a perspective view of the translucent plate 12 and its vicinity, FIG. 2 is a partial sectional view thereof, and FIGS. The figure is a partial sectional view of the vicinity of the translucent plate 12, showing a second embodiment of this invention, and FIGS. 5 to 7 show a third embodiment of this invention, and FIG. 6 and 7 are perspective views of the vicinity of the translucent plate 12, and FIGS. 8 and 9 show conventional devices. The perspective view and FIG. 9 are side views showing the overall structure of the contact printing apparatus. 12... Translucent plate, 16... Light source, 26... Original plate, 32... Hole, 34... Flexible sheet.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. In a contact printing device in which an original plate and a photosensitive material are superimposed on a transparent plate and exposed from the side of the transparent plate, an air blowing part is provided at one end of the transparent plate. In addition, a contact printing device characterized in that a regulating means for regulating the air flow blown out from the air blowing portion is hinged to the transparent plate. 2. The contact printing apparatus according to claim 1, wherein the regulating means is a flexible sheet-like material whose one end is fixed to a translucent plate. 3. The contact printing apparatus according to claim 1 or 2, wherein the air blowing portion is a hole formed in a transparent plate. 4. The contact printing apparatus according to claim 3, wherein the regulating means has a hole having a smaller area than the hole in the light-transmitting plate.