Process and apparatus for copying on printing plates

Details Process and apparatus for copying on printing plates Process and apparatus for copying on printing plates

1975-05-27

1977-07-05

Moses, R. L.

Photocopying

Contact printing

Exposing on sensitized printing press plate or cylinder

248363, 355 91, 355132, G03B 2720

Patent

active

040336956

ABSTRACT:
A process and apparatus for exposing light-sensitive printing plates through an original to be copied, which includes forming a cassette-type, vacuum frame assembly by superimposing the printing plate and the original upon one another and disposing them in a cavity formed between an elastic blanket and a light-permeable plate, and evacuating the assembly, to improve contact between the printing plate and the original, at a position removed from a light means, thereafter temporarily placing the assembly in a position to be exposed to the light means and finally removing the assembly from the exposure position. A vacuum frame assembly is provided having a connect-disconnect means for temporary attachment both to the evacuation means removed from the light source and, if desired, to an evacuation means at the exposure position. Transport systems are also provided, including conveyor belts or transport chains for sequentially transporting a plurality of assemblies to and from the exposure position and from a feed magazine to a discharge magazine via the exposure position.

REFERENCES:
patent: 3259046 (1966-07-01), Nishimura
patent: 3512487 (1970-05-01), Krantz et al.
patent: 3556656 (1971-01-01), Evensen

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