Apparatus and method for cleaning residual toner from drums...

Electrophotography – Image formation – Combined or plural functions by single component

Reexamination Certificate

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Reexamination Certificate

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11091600

ABSTRACT:
An apparatus and method for cleaning a plurality of drums in an image forming apparatus includes applying a first bias to each of a plurality of disturbing members, each disturbing member associated with a corresponding drum of a plurality of drums. While performing an image forming operation wherein at least one of the plurality of drums is not use, the bias is changed of a disturbing member corresponding to at least one of the plurality of drums not used in performing the image forming operation from the first bias to a second bias different from the first bias.

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