Surface potential control device of photoconductive member

Details Surface potential control device of photoconductive member Surface potential control device of photoconductive member

1989-12-13

1991-10-22

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355219, G03G 1502

Patent

active

050600176

ABSTRACT:
Action of a charging device in an image forming apparatus is started with an output value different from a predetermined value which is set according to a characteristic of attenuation of a photoconductor, and the value is controlled so as to coincide with the predetermined value after a predetermined period of time has elapsed. It is further controlled so as to become different output characteristics at an initial stage and the latter half stage of the predetermined period of time to charge the photoconductor corresponding to actual difference in the state of attenuation caused by the difference in a period of duration when it is used and when it is not used.

REFERENCES:
patent: 4105324 (1978-08-01), Seil
patent: 4456365 (1984-06-01), Yuasa
patent: 4522904 (1985-06-01), Kina et al.
patent: 4811045 (1989-03-01), Matsushita et al.
patent: 4920380 (1990-04-01), Ueda et al.
U.S. patent application Ser. No. 07/226,056.

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