Exposure and development system for electrophotography

Details Exposure and development system for electrophotography Exposure and development system for electrophotography

1975-07-08

1977-07-12

Moses, R. L.

Photocopying

Including fiber optics

355 3DD, 355 14, 355 69, 355 71, G03G 1500

Patent

active

040350690

ABSTRACT:
In order to improve the reproduction of low contrast originals, the exposure intensity is reduced to a value at which the difference in brightness of the light and dark areas of the original will produce a maximum difference in electric potential on a photoconductive drum. The voltage applied to a developing electrode is increased to prevent darkening of the light areas of the copy.

REFERENCES:
patent: 3700323 (1972-10-01), Guyette et al.
patent: 3788739 (1974-01-01), Coriale
patent: 3877803 (1975-04-01), Seliger

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