Method of maintaining the correct conditions of an electrophotog

Details Method of maintaining the correct conditions of an electrophotog Method of maintaining the correct conditions of an electrophotog

1983-11-18

1987-01-13

Braun, Fred L.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

118668, 355 14E, 430 30, G03G 1504, G03G 1506

Patent

active

RE0323306

ABSTRACT:
A method of maintaining the correct conditions of an electrophotographically duplicated image, which uses a reference plate having at least a dark-tone area and a light-tone area and in which signals associated with the reference plate are detected and synthesized to control the duplicating process conditions such as developing bias potential, charge, exposure and of the optical system so that an optimum image may be produced.

REFERENCES:
patent: 3438705 (1969-04-01), King
patent: 3788739 (1974-01-01), Coriale
patent: 3815988 (1974-06-01), McVeigh et al.
patent: 4050806 (1977-09-01), Miyakawa et al.
patent: 4082445 (1978-04-01), Steiner
patent: 4358520 (1982-11-01), Hirayama

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