Image forming device that changes process speed according to...

Details Image forming device that changes process speed according to... Image forming device that changes process speed according to...

2006-05-02

2006-05-02

Lee, Susan (Department: 2852)

Electrophotography

Control of electrophotography process

Control of transfer

C399S045000, C399S081000

Reexamination Certificate

active

07039334

ABSTRACT:
A voltage generated when a predetermined electric current is applied to a transfer roller is measured, and a sheet transport speed is determined based on the measured voltage, a sheet type, and a sheet width. The transport speed is reduced when current leakage tends to occur due to a narrow sheet width or low resistance in the transfer roller, so that the electric charge per unit area applied to the sheet is maintained constant without increasing a transfer bias to be applied to the transfer roller.

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