Image forming apparatus with contact type charging member

Details Image forming apparatus with contact type charging member Image forming apparatus with contact type charging member

1995-09-29

1997-10-14

Grimley, Arthur T.

Electrophotography

Control of electrophotography process

Control of charging

219497, 361225, 399176, G03G 1502

Patent

active

056781296

ABSTRACT:
An image forming apparatus includes a charging member to be contacted with a rotating photosensitive body so as to charge the photosensitive body, a temperature detection device for detecting temperature of the charging member, and a voltage control device for controlling a voltage to be supplied to the charging member in accordance with a temperature value detected by the temperature detection device. The control device includes a detection temperature read device for reading the detection temperature value detected by the temperature detection device, a voltage calculation device for calculating a voltage to be supplied to the charging member based on the detection temperature value read by the detection temperature read device, and a maintenance device for maintaining a charging voltage as it is, which charging voltage is calculated last time, when a difference between the detection temperature value currently read by the detection temperature read device and the detection temperature value which is read last time by the detection temperature read device has exceeded a preset temperature value.

REFERENCES:
patent: 5038175 (1991-08-01), Sohmiya et al.
patent: 5365318 (1994-11-01), Hiraoka et al.
patent: 5479243 (1995-12-01), Kurokawa et al.
patent: 5483323 (1996-01-01), Matsuda et al.

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