Image forming apparatus with a charging member which removes smears on an image forming member
OwnerMasataka Yagi, Tamotsu Sakuraba +7inventors
InventorsMasataka Yagi, Tamotsu Sakuraba, Tetsumaru Fujita, Narutaka Yoshida, Akira Hirota, Tsugihito Yoshiyama, Masami Matsuura, Yasuhiro Nakagami, Masayasu Haga
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Abstract
An image forming apparatus with a charging member that allows easy removal of smears from an image forming drum. The apparatus removes smears from the image forming drum by placing a different portion of the charging member in contact with the drum. The apparatus uses a cam or a solenoid to press on the charging member to cause a different portion of the charging member to come into contact with the image forming drum.
Claims35
An image forming apparatus comprising:
- a charging device opposed to a moving surface of an image carrier, said charging device including a charging member to be supplied with a charging voltage and having a smooth surface opposed to said image carrier, and said smooth surface of said charging member contributing to discharging to said image carrier;
- a support member for supporting said charging member and holding a portion of said smooth surface in contact with said image carrier;
- and
- a charging member drive device for moving said support member to thereby cause the portion of said smooth surface to no longer be in contact with said image carrier and to cause a different portion of said smooth surface to be in contact with said image carrier,
- wherein said charging member drive device reciprocates the portion of said smooth surface to be in and out of contact with said image carrier during a cleaning operation.
An electrophotographic image forming apparatus of a cleanerless type comprising:
- a plurality of contact members in contact with a surface of an image carrier, wherein one of said plurality of contact members shaves said image carrier surface to the highest extent and has a contact surface in contact with the image carrier surface, said contact surface of said one of said plurality of contact members having a high smoothness compared with the other of said plurality of contact members.
An electrophotographic image forming apparatus comprising:
- a developing/cleaning device for performing simultaneous development and cleaning of toner remaining on an image carrier having a moving surface after transfer onto a transfer target member of a visible toner image formed on said moving surface;
- a foreign matter removing device arranged at a section defined in the moving direction of said moving surface between a transfer portion and said developing/cleaning device, wherein
- said foreign matter removing device includes a foreign matter removing member having a foreign matter removing edge portion opposed to said moving surface, and said foreign matter removing edge portion is located at a distance ranging from 0 to 200 .mu.m from said moving surface.
An image forming apparatus comprising:
- a charge target member to be charged;
- and
- a charging device for charging said charge target member, said charging device includes a flexible and unrotational conductive charging member for applying electric charges to said charge target member, and said charging member has a leading edge to be pressed obliquely against said charge target member for charging;
- and
- a pressing direction changing device for changing a direction of pressing of said unrotational conductive charging member against said charge target member.
Dependencies are inferred from the claim text.