Electrophotographic apparatus and process cartridge
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United States of America Patent
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-
Sep 11, 2001
Grant Date -
N/A
app pub date -
Sep 3, 1999
filing date -
Sep 4, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An electrophotographic apparatus includes an electrophotographic photosensitive member; a charger for charging the electrophotographic photosensitive member including a charging member supplied with a voltage and disposed in contact with the photosensitive member so as to form a nip with the photosensitive member to charge the photosensitive member; an exposure device; a developing device; and a transfer device. The photosensitive member includes a surface layer containing a charge-transporting material having an oxidation potential of 0.4-1.0 volt. Charging promoter particles are present at the nip between the photosensitive member and the charging member to injection-charge the photosensitive member. Because of the selection of the charge-transporting material and the presence of the charging promoter particles, the photosensitive member can be effectively injection-charged.
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