Image density control by sensing reference density patterns at m

Details Image density control by sensing reference density patterns at m Image density control by sensing reference density patterns at m

1989-10-26

1990-12-04

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355214, G03G 2100

Patent

active

049757474

ABSTRACT:
An image density control for an electrophotographic copier uses a first and a second reference density pattern having a comparatively low and a comparatively high reference density, respectively. After latent images of the first and second reference density patterns have been formed on a photoconductive element, a potential sensor senses their potentials. In response to the sensed potentials, the potentials of the latent images are set at their predetermined target value. These target values are variable as desired.

REFERENCES:
patent: 4313671 (1982-02-01), Kuru
patent: 4539279 (1985-09-01), Murai et al.
patent: 4736223 (1988-04-01), Suzuki

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