Image forming apparatus featuring first and second cleaning...

Details Image forming apparatus featuring first and second cleaning... Image forming apparatus featuring first and second cleaning...

2008-07-22

2008-07-22

Tran, Hoan H (Department: 2852)

Electrophotography

Control of electrophotography process

Control of cleaning

C399S343000, C399S354000

Reexamination Certificate

active

11251797

ABSTRACT:
An image forming apparatus including an image bearing member bearing thereon a toner image charged to a predetermined polarity, a transferring device for electrostatically transferring the toner image borne on the image bearing member to a recording material, first and second cleaning members for electrostatically removing from the image bearing member any toner residual on the image bearing member when the toner image is transferred to the recording material, a first power supply for applying a bias of the same polarity as the predetermined polarity to the first cleaning member, a second power supply for applying a bias of a polarity opposite to the predetermined polarity to the second cleaning member, and a controller for variably controlling the condition of the bias applied to the first cleaning member and the condition of the bias applied to the second cleaning member independently of each other.

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