Electrophotography – Control of electrophotography process – Having temperature or humidity detection
Patent
1995-09-28
1999-10-12
Beatty, Robert
Electrophotography
Control of electrophotography process
Having temperature or humidity detection
399 46, 399 50, 399 51, G03G 1500
Patent
active
059665580
ABSTRACT:
The surface of a photosensitive body is evenly charged by a charging member, and then the charged surface is exposed to light by an exposure device in order to produce an electrostatic latent image. A toner is caused to adhere to the latent image by a developing roller and then is transferred to paper. The temperature of the charging member is detected by a temperature detecting device and, in accordance with the detected temperature, a voltage to be applied to the charging member is corrected by a voltage correcting device. An aging change of the photosensitive body is detected by an aging change detecting device and, in accordance with the amount of the aging change, a correction rule for an applied voltage corrected by the voltage correcting device is changed by a correction rule changing device. A potential of the surface of the charged photosensitive body or a developing bias of the developing roller in an image forming process is corrected by a potential correcting device. The surface of the photosensitive body is charged with the corrected voltage and then a reference potential pattern is formed. After the correction of the potential, the amount of light of the exposure device in the image forming process is corrected by an amount-of-light correcting device on the basis of a reference potential detected when the reference potential pattern is formed.
REFERENCES:
patent: 4636060 (1987-01-01), De Schamphelaere et al.
patent: 4816871 (1989-03-01), Oushiden et al.
patent: 4870460 (1989-09-01), Harada et al.
patent: 5237369 (1993-08-01), Maruta et al.
patent: 5307118 (1994-04-01), Morita
patent: 5606399 (1997-02-01), Kikui
Beatty Robert
Ricoh & Company, Ltd.
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