Toner density control apparatus

Details Toner density control apparatus Toner density control apparatus

1987-10-28

1989-01-31

Prescott, A. C.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 3DD, 355 14R, 118689, 430 30, G03G 1508

Patent

active

048019801

ABSTRACT:
A toner density control apparatus wherein an image density of a reference image on a photosensitive member is compared with a predetermined level to control a toner density, a voltage to be applied on a light-emitting element is controlled according to a difference between an output of a light-receiving element when it receives a light reflected from a non-image surface region on the photosensitive member and correction reference data, and a signal is supplied to the outside when the voltage is increased more than a predetermined value.

REFERENCES:
patent: 4239372 (1980-12-01), Iwai
patent: 4273843 (1981-06-01), Fujita et al.
patent: 4451135 (1984-05-01), Okumura
patent: 4466731 (1984-08-01), Champion et al.
patent: 4468112 (1984-08-01), Suzuki et al.
patent: 4533234 (1985-08-01), Watai et al.

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