Image forming apparatus with bias means for preventing toner par

Details Image forming apparatus with bias means for preventing toner par Image forming apparatus with bias means for preventing toner par

1993-03-23

1995-03-14

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355215, G03G 2100

Patent

active

053980999

ABSTRACT:
An image forming apparatus includes a conductive transparent member arranged between a photoconductive drum and a laser optical system for exposing the drum. The transparent member is electrically connected to a bias voltage power supply. In reversal development, the bias voltage power supply supplies the transparent member with a voltage ranging from a charging voltage to a developing voltage so as to generate an electric field between the transparent member and the drum. In normal development, the power supply supplies the transparent member with a voltage ranging from the developing voltage to ground so as also to generate an electric field between the transparent member and the drum.

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