Photocopying – Contact printing – Machine
Patent
1987-12-23
1989-01-31
Wintercorn, Richard A.
Photocopying
Contact printing
Machine
355110, G03B 2730, G03B 2710
Patent
active
048019798
ABSTRACT:
The invention is directed to a method and apparatus for copying images on a master microfiche film into a copy microfiche film. An apparatus in accordance with the present invention comprises an endless tensioning belt threaded around belt rollers, the tensioning belt pressing the master film and the copy film into intimate contact with each other and with an exposure surface, such that there is substantially no slippage between the exposure surface, the master film, the copy film and the tensioning belt. After leaving the exposure station, the copy film is passed through a development section and then through a cooling section. Drive means are provided for driving the copy film. In one aspect of the present invention, the master film and the tensioning belt are passively driven by the drive means by virtue of contact between the copy film and each of the master film and the tensioning belt, and the exposure surface is rotated by virtue of contact with the master film. Helical grooves are preferably formed in the surfaces of the belt rollers such that the grooves converge or diverge relative to the tensioning belt. The cooling section preferably comprises air knife units having slots formed therein through which pressurized, filtered air is passed to contact said copy film and a rotatable, cylindrical chill drum having a plurality of cylindrical holes formed therethrough, through which cooling air is blown.
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Innovative Technology Inc.
Wintercorn Richard A.
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