Electrophotographic device having a.c. biased cleaning member

Details Electrophotographic device having a.c. biased cleaning member Electrophotographic device having a.c. biased cleaning member

1988-10-24

1989-10-17

Prescott, A. C.

Photocopying

Contact printing

Light boxes

355297, 355298, 355299, 355300, 355305, G03G 1508, G03G 1500

Patent

active

048750816

ABSTRACT:
In a cleaning arrangement for the removal of residual toner from a charge retentive surface, such as a photoreceptor surface in a reproduction machine, after a transfer step, a conductive cleaning member is arranged closely adjacent the surface. An A.C. voltage is applied to the member. In such an arrangement, toner in the vicinity of the blade is observed to jump from the surface in response to the electric field created at the member, forming an oscillating toner cloud. The agitated toner further aids in removal of toner from the surface by causing a large number of toner/toner impacts that jar toner held on the surface into movement. Toner held on the surface is thus removed electrostatically and mechanically. Toner in the cloud configuration may be easily removed from the area adjacent the surface by an airstream through the area, a biased collecting surface, or a traveling electrostatic wave arrangement, among other methods.

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