Image forming apparatus

Details Image forming apparatus Image forming apparatus

2011-08-30

2011-08-30

Walsh, Ryan D (Department: 2852)

Electrophotography

Control of electrophotography process

Control of transfer

C399S045000, C399S314000

Reexamination Certificate

active

08010005

ABSTRACT:
An image forming apparatus includes a transfer device, a voltage applicator, a current sensor, and a discharge detector. The transfer device transfers a toner image from one surface to another by developing an electrical field across a transfer gap when provided with a transfer bias. The voltage applicator applies a stepped test voltage to the transfer device. The current sensor senses a current flowing to the transfer device during application of the test voltage the discharge detector detects an electrical discharge occurring in the transfer gap based on a rate of increase of the sensed current.

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