Image forming apparatus including a pre-transfer eraser

Details Image forming apparatus including a pre-transfer eraser Image forming apparatus including a pre-transfer eraser

1998-12-04

2000-02-15

Grimley, Arthur T.

Electrophotography

Image formation

Treatment of developed image prior to transfer

399 66, 399156, G03G 1500, G03G 1516

Patent

active

060262672

ABSTRACT:
When image areas pass the pre-transfer eraser, a control unit sets the light quantity of the pre-transfer eraser so that the potential of the background areas changes to reduce the difference from the potential of the visible image areas. A pre-transfer surface potential of the background areas in the image areas is controlled to a level that prevents the central parts of letters from missing and restrains the spread of toner in the periphery of letters. When the non-image areas pass the pre-transfer eraser, the control unit sets the light quantity of the pre-transfer eraser so as to be larger than that of the case when the image areas are exposed. Specifically, the control unit sets the light quantity of the pre-transfer eraser so that the surface potential of the non-image areas is reduced to the residual potential level of the photoreceptor surface having passed a charge removing unit.

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