Photocopying – Projection printing and copying cameras – Illumination systems or details
Patent
1977-11-04
1979-11-27
Hix, L. T.
Photocopying
Projection printing and copying cameras
Illumination systems or details
355 77, 355 38, G03B 2778
Patent
active
041758560
ABSTRACT:
The photographic printer of the present invention stores measured gamma values for the photosensitive medium upon which prints are to be made. The gamma values modify exposure times so that the operator button corrections always correspond to a known increment in density. When the photosensitive medium is changed, new gamma values are entered and the printer again modifies exposure times by the appropriate amount so that button correction increments remain constant despite the change in paper gamma.
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Brady W. J.
Hix L. T,.
Pako Corporation
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