Image forming apparatus employing a cleaner-less system

Details Image forming apparatus employing a cleaner-less system Image forming apparatus employing a cleaner-less system

2007-11-29

2010-02-02

Chen, Sophia S (Department: 2852)

Electrophotography

Control of electrophotography process

Control of charging

C399S129000, C399S149000

Reexamination Certificate

active

07657197

ABSTRACT:
An image forming apparatus performs a control sequence in which an AC voltage having a peak-to-peak voltage is applied to a charging member so that a relationship between an absolute value of a surface potential of an image bearing member at a portion under a transfer residual toner remaining on the image bearing member which has been electrically charged by the charging member during non-image formation and an absolute value of a surface potential of a developer carrying member is reversed with respect to a relationship between these absolute values during image formation.

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Official Letter (English Translation)/Search Report, dated Apr. 10, 2009, issued by the Chinese Patent Office, in Chinese Patent Application No. 200710196488X.

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