Photocopying – Contact printing – Light boxes
Patent
1975-09-29
1978-05-23
Griffin, Donald A.
Photocopying
Contact printing
Light boxes
355 29, G03D 700, G03B 2900
Patent
active
040914038
ABSTRACT:
A film advancing module which cooperates with a basic processing module to duplicate a master microfiche. The film advancing module includes a film drawing station for drawing a continuous strip of diazo microfilm from the basic processing module into the film advancing module, a film cutting station for separating an exposed film segment from the continuous strip of microfilm, a film developing station for drawing the film segment through ammonia vapor to develop it and a film receiving station for collecting the film segment. The supply of ammonia vapor to the film developing station is correlated with the advance of the film segment through the developing station so that essentially all of the ammonia vapor is utilized in the developing process. Any ammonia which might not be utilized is removed from the developing station and neutralized in a tank of citric acid. The developing station includes a plurality of rollers which define a serpentine path of travel for the film segment. The rollers are grouped in stacks with only the lower roller in each stack being driven and in turn driving the other rollers through "O" ring "tires" which may be offset from the " tires" of an adjacent stack to prevent streaking or tracking of the film segment.
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patent: 3900862 (1975-08-01), Bennett
Clemens William J.
Griffin Donald A.
Magnagard Equipment & Manufacturing Corporation
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