Cleaning unit, process cartridge, and image forming...

Details Cleaning unit, process cartridge, and image forming... Cleaning unit, process cartridge, and image forming...

2011-04-19

2011-04-19

Gray, David M (Department: 2852)

Electrophotography

Cleaning of imaging surface

Fibrous brush

C399S359000, C399S343000, C399S071000

Reexamination Certificate

active

07929897

ABSTRACT:
A cleaning apparatus for removing charged particles includes a cleaning brush and a recovery unit. The cleaning brush removes the charged particles from an object by attracting the charged particles having positive and negative polarity. The recovery unit for recovering the charged particles from the cleaning brush includes a recovery member, a first charge applicator, a second charge applicator, and a voltage control unit. The recovery member is supplied with a voltage to attract the charged particles. The recovery member has a core and a surface layer. The first charge applicator applies a voltage to the surface layer of the recovery member. The second charge applicator applies a voltage to the core of the recovery member. The voltage control unit controls a polarity of the voltage to be applied by the first and second charge applicators depending on a polarity of the charged particles to be recovered.

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