Image forming apparatus with variable speed charging member

Details Image forming apparatus with variable speed charging member Image forming apparatus with variable speed charging member

2005-11-08

2005-11-08

Grainger, Quana (Department: 2852)

Electrophotography

Control of electrophotography process

Control of charging

C399S149000

Reexamination Certificate

active

06963700

ABSTRACT:
An image forming apparatus includes an image bearing member; a charging member, contactable to the image bearing member, for electrically charging the image bearing member at a charging position; developing means for developing an electrostatic image formed on the image bearing member with a developer; wherein when a first area on the image bearing member which is going to be an image formation area is at the charging position, the charging member moves with a peripheral speed difference relative to the image bearing member, and when a second area on the image bearing member which is a part of an area which is going to be a non-image formation area is at the charging position, the charging member moves substantially without a peripheral speed difference relative to the image bearing member, and wherein a collecting electric field is formed for collecting the developer from the second area to the developing means.

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