Photocopying – Contact printing – Machine
Patent
1977-05-26
1978-08-08
Griffin, Donald A.
Photocopying
Contact printing
Machine
355132, G03B 2710, G03B 2702
Patent
active
041053311
ABSTRACT:
An apparatus and method to position a moving continuous strip master and a moving continuous strip duplicate for copying film images from the master to the duplicate. A vacuum is applied to a housing, the walls of which are partially formed by surfaces of longitudinally extending adjacent rollers. The master and duplicate are inserted through adjacent roller pairs and both sides exposed to a vacuum within the housing. The master and duplicate are removed from the housing with confronting surfaces in contact through a third adjacent roller pair. As a result of the vacuum created between the confronting strip surfaces and atmospheric pressure on opposite strip surfaces the relative position of the master to the duplicate is maintained until exposure to a light source is complete.
REFERENCES:
patent: 3468606 (1969-09-01), Wolf et al.
patent: 3595561 (1971-07-01), Leblant
patent: 3644040 (1972-02-01), Beispel
patent: 3661457 (1972-05-01), Frech
Farmer Donald J.
Wallace Charles E.
Extek Microsystems, Inc.
Griffin Donald A.
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