Image density adjustment method and apparatus

Details Image density adjustment method and apparatus Image density adjustment method and apparatus

1979-01-08

1981-03-17

Moses, R. L.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 10, 355 14C, 355 14D, 355 67, 355 77, 118647, 430 31, G03G 1500

Patent

active

042564018

ABSTRACT:
The image density adjustment method for use in electrophotography in which, when the image density of a copied image is decreased below a standard image density, the development bias-potenial is increased while the exposure to be applied to a photoconductor is kept constant. When the image density of a copied image is increased above the standard image density, the exposure is decreased while the development bias voltage is kept constant. Thus, the image density of a copied image can be adjusted as desired to minimize the effect of light fatigue of the photoconductor.

REFERENCES:
patent: 4035069 (1977-07-01), Yano
patent: 4087171 (1975-05-01), Yano

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