Apparatus for controlling toner concentration in electrophotogra

Details Apparatus for controlling toner concentration in electrophotogra Apparatus for controlling toner concentration in electrophotogra

1979-01-05

1981-02-03

Braun, Fred L.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

118665, 118668, 355 14D, G03G 1500

Patent

active

042485274

ABSTRACT:
An apparatus for controlling the toner concentration in electrophotographic copying machines produces a toner concentration signal in response to the density of a reference patch image formed on a moving electrophotosensitive medium. The patch image density is detected at a time corresponding to a predetermined extent of movement of the electrophotosensitive medium following receipt of a signal indicating scanning of the original to be copied.

REFERENCES:
patent: 3604796 (1971-09-01), Ogawa
patent: 3815988 (1974-06-01), McVeigh et al.
patent: 3872825 (1975-03-01), Davidson
patent: 4025184 (1977-05-01), Mochizuki
patent: 4142792 (1979-03-01), Satomi et al.

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