Charging member
AssigneeCanon Kabushiki Kaisha
InventorsHisami Tanaka, Masami Okunuki
Life of this patent
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Abstract
There is provided a charging member comprising an electroconductive substrate, and an elastic layer, an electroconductive layer and a resistance layer disposed in this order on the substrate. Such charging member provides good contact with a photosensitive member, to provide good image quality without causing an image defect such as white spot based on charging unevenness. Further, the charging member causes no leak even when the photosensitive member has a pin hole, and reduced the level of noise based on an AC voltage to be applied thereto.
Claims36
A charging member having a surface capable of contact charging a charge-receiving member by surface contact comprising, in sequence:
- an electroconductive substrate, an elastic layer, an electroconductive layer electrically connected to said electroconductive substrate and a resistance layer.
A contact charging method, comprising:
- providing a charging member having, in sequence, an electroconductive substrate;
- an elastic layer;
- an electroconductive layer electrically connected to said electroconductive substrate and a resistance layer;
- providing a charge-receiving member disposed in contact with the charging member;
- and
- applying a voltage to the charging member by means of an external power supply, thereby to charge the charge-receiving member.
An electrophotographic apparatus, comprising:
- a charging member which comprises, in sequence, an electroconductive substrate, an elastic layer, an electroconductive layer electrically connected to said electroconductive substrate and a resistance layer;
- and
- an electrophotographic photosensitive member disposed in contact with the charging member.
Dependencies are inferred from the claim text.