Photocopying – Contact printing – Machine
Patent
1977-06-02
1978-04-04
Griffin, Donald A.
Photocopying
Contact printing
Machine
355 73, 355132, G03B 2730, G03B 2760, G03B 2702
Patent
active
040824551
ABSTRACT:
Automatic equipment is described for making multiple plate copies for an offset printing process from a single negative. A stack of plates having prepunched locating openings is provided with the emulsion side facing down and with the pile being automatically raised so that the top plate is at a particular location. A parallelogram linkage makes vacuum connection to the back of the plate, and moves the plate immediately on top of and in registry with a negative which is installed on a negative carrier plate. The plate is then exposed through the negative, and the parallelogram linkage and plate carrier then move back to the plate stack to pick up a new plate. A plate transfer mechanism then makes vacuum connection to the back surface of the exposed plate and rotates the plate, and inverts it onto a delivery belt system for delivering the exposed plate to a plate processor.
REFERENCES:
patent: 2236197 (1941-03-01), Moore
patent: 2484048 (1949-10-01), Powers et al.
patent: 2822723 (1958-02-01), Grey
patent: 2842037 (1958-07-01), Gobeille et al.
patent: 3535039 (1970-10-01), Lakin et al.
patent: 3558223 (1971-01-01), Hemphill
patent: 3591285 (1971-07-01), Hakogi
patent: 3756708 (1973-09-01), Lakin et al.
patent: 4007987 (1977-02-01), Sheets
patent: 4033695 (1977-07-01), Sader et al.
Berlow Cynthia
Griffin Donald A.
Sun Chemical Corporation
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