Image forming apparatus with controller that applies...

Details Image forming apparatus with controller that applies... Image forming apparatus with controller that applies...

2006-05-23

2006-05-23

Grainger, Quana (Department: 2852)

Electrophotography

Control of electrophotography process

Having temperature or humidity detection

C399S066000, C399S149000

Reexamination Certificate

active

07050730

ABSTRACT:
A cleaner-less image former that can prevent cleaning efficiency from reducing and maintain high print quality. After a printing process is started, one lookup table LUT is selected from a group of LUTs based on a temperature detected by a temperature sensor and the number of sheets of paper which have been printed. A pre-transfer bias is determined by applying a current value memorized in a feedback current value memorizing part to the selected LUT, the determined pre-transfer bias is applied to a transfer roller, and then a transfer bias is determined based on the above current value and the temperature. The determined transfer bias is applied to the transfer roller. The residual toner remaining on the transfer roller, a charge brush and a memory removal brush is removed by applying the pre-transfer bias.

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