Photocopying – Contact printing – Machine
Patent
1982-03-26
1984-01-03
Wintercorn, Richard A.
Photocopying
Contact printing
Machine
355 85, 355100, G03B 2704
Patent
active
044239556
ABSTRACT:
Apparatus for exposing lithographic plates to light through a film, e.g. a negative, adapted for exposing one plate to light through a film or a plurality of plates to light through a film, having a first carriage with vacuum grippers for picking up a plate and a negative from each of two side-by-side plate stacks and two side-by-side negative stacks, the carriage being adapted to carry the picked-up plates and negatives to an exposure station and deposit them in registration on a platen at the exposure station for exposure of the plates to light through the negatives and through a window movable up and down at the exposure station, the window having vacuum grooves for raising the negatives, the apparatus further having a second carriage with vacuum grippers for gripping the plates exposed at the exposure station and negatives raised with the window and carrying the exposed plates and the films away from the platen and the window and out of the exposure station.
REFERENCES:
patent: 3535039 (1970-10-01), Lakin et al.
patent: 3635559 (1972-01-01), Harrell et al.
patent: 3810694 (1974-05-01), Harrell et al.
patent: 3817618 (1974-06-01), Riley et al.
patent: 3857635 (1974-12-01), Niehaus
patent: 4082455 (1978-04-01), Brigham
patent: 4178097 (1979-12-01), Sara
patent: 4353647 (1982-10-01), Harrell et al.
Prints of sheets 1 and 3 of the drawings of application Ser. No. 223,317.
Print of a drawing showing a plate printing apparatus.
Western Litho Plate & Supply Co.
Wintercorn Richard A.
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