Image forming apparatus for controlling a potential of an...

Details Image forming apparatus for controlling a potential of an... Image forming apparatus for controlling a potential of an...

2011-08-02

2011-08-02

Gray, David M (Department: 2852)

Electrophotography

Control of electrophotography process

Control of charging

C399S051000

Reexamination Certificate

active

07991312

ABSTRACT:
An image forming apparatus includes a charging device, an image bearing member, an electrostatic image forming device, a development device including a developer bearing member, a transfer device, and a controller. The controller controls a potential of the image bearing member such that, during image formation to form an image on a recording material having a predetermined size, an absolute potential value (V1) of a region on a surface of the image bearing member outside a region corresponding to a passage region for a recording material in a width direction orthogonal to a movement direction of the surface of the image bearing member, an absolute potential value (V2) of a non-image portion in the region corresponding to the passage region for the recording material, and an absolute potential value (Vdc) of the developer bearing member satisfy the following condition:in-line-formulae description="In-line Formulae" end="lead"?Vdc<V1<V2.in-line-formulae description="In-line Formulae" end="tail"?

REFERENCES:
patent: 2006/0083527 (2006-04-01), Sakamaki
patent: 08-314253 (1996-11-01), None
patent: 11194556 (1999-07-01), None
patent: 2001-343795 (2001-12-01), None
patent: 2006-293240 (2006-10-01), None
Machine English Translation of JP11194556.

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