Device for correcting an applied voltage in an image forming app

Details Device for correcting an applied voltage in an image forming app Device for correcting an applied voltage in an image forming app

1995-09-27

1997-02-25

Grimley, Arthur T.

Electrophotography

Image formation

Charging

399 9, 399 44, G03G 1502

Patent

active

056063997

ABSTRACT:
A voltage is supplied to a charging member by a voltage supplying device, the charging member contacts a photosensitive body, which is rotating in a predetermined direction, in order to charge its surface, temperature of the charging member is detected by a temperature detector, and the voltage to be supplied by the voltage supplying device is corrected by a voltage correcting device in accordance with the result of detection by the temperature detector. At that time, since the quality of an image is stabilized by correction of a reference supplying voltage in accordance with a target electric potential variable depending on change of temperature of the charging member, the electric potential to be charged to the surface of the photosensitive body has a plurality of target values, a reference value of the voltage to be supplied by the voltage supplying device is set per each target value, and a correction rule for a supplying voltage to be corrected by the voltage correcting device is made different by a correction rule changing device per each reference value for a target value of each electric potential to be charged.

REFERENCES:
patent: 5200780 (1993-04-01), Koichi
patent: 5307118 (1994-04-01), Morita
patent: 5365318 (1994-11-01), Hiraoka et al.
patent: 5434651 (1995-07-01), Aizawa et al.

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