Automatic background control for an electrostatic copier

Details Automatic background control for an electrostatic copier Automatic background control for an electrostatic copier

1988-03-14

1990-03-27

Braun, Fred L.

Photocopying

Contact printing

Light boxes

355 69, 355214, G03G 2100

Patent

active

049125087

ABSTRACT:
A document background control system having a sensor in the optical path of a reproduction machine to sense the background of a document in the copy mode during the scanning of the document to adjust the illumination of the document and also includes a control to adjust the charging potential on the photoconductor in response to document background that is non-white.

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patent: 4711554 (1987-12-01), Nishimori

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