Electrophotography – Diagnostics – Consumable
Patent
1996-01-23
1998-09-08
Braun, Fred L.
Electrophotography
Diagnostics
Consumable
399 48, 399169, G03G 2100
Patent
active
058059512
ABSTRACT:
An image forming apparatus for detecting the useful life of an image bearing member includes an image bearing member; a charging member contactable to the image bearing member for charging the image bearing member, the charging member being supplied with a voltage. The image forming apparatus also includes a discharging member for electrically discharging the image bearing member, the discharging member discharging a first region of the image bearing member and a second region of the image bearing member, different from the first region in a direction of a generating line of the image bearing member; and a detecting device for detecting a current flowing through the charging member when the charging member is supplied with a predetermined voltage and charges the first region having been discharged by the discharging member and when the charging member also charges the second region having been discharged by the discharging member.
REFERENCES:
patent: 4284344 (1981-08-01), Okamoto et al.
patent: 5072258 (1991-12-01), Harada
patent: 5160967 (1992-11-01), Tonegawa
patent: 5278612 (1994-01-01), Inui
patent: 5485248 (1996-01-01), Yano et al.
patent: 5548380 (1996-08-01), Naka et al.
Ando Atsutoshi
Inami Satoru
Kato Jun-ichi
Suzuki Jun
Braun Fred L.
Canon Kabushiki Kaisha
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