Electrophotography – Internal machine environment – Particle or contaminant control
Patent
1996-02-23
1997-11-18
Beatty, Robert
Electrophotography
Internal machine environment
Particle or contaminant control
G03G 1516
Patent
active
056897715
ABSTRACT:
A color toner image forming apparatus comprises a transferring roller having an average cell diameter of 1 .mu.m to 300 .mu.m to transfer a toner image from a photoreceptor drum to a sheet. During the transferring operation, the electric bias member applies onto the transferring roller an opposite electric bias of a constant current having the opposite electric polarity to that of the toner image, and during a cleaning operation to shift toner adhered on the transferring member to the photoreceptor, the electric bias member applies onto the transferring member alternately an identical electric bias of a constant voltage having the identical electric polarity with that of the toner image and an opposite electric bias of a constant current having the opposite electric polarity to that of the toner image six times or more.
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Sato Kazuhiko
Takenouchi Shigeki
Beatty Robert
Konica Corporation
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