Image forming apparatus having a bipolar photosensitive member

Details Image forming apparatus having a bipolar photosensitive member Image forming apparatus having a bipolar photosensitive member

1995-06-01

1996-09-24

Moses, R. L.

Photocopying

Contact printing

Light boxes

355271, 355226, G03G 15045, G03G 1500

Patent

active

055595804

ABSTRACT:
In a microfilm reader printer, a photosensitive member which can be charged to be positive and negative. The photosensitive member is charged to be positive in a reverse development mode and charged to be negative in a normal development mode. In the reverse development mode at least right before the reverse development mode is switched to the normal development mode, not only a charge area but also a non-charge area are irradiated by a main eraser. On the other hand, in the normal development mode at least right before the normal development mode is switched to the reverse development mode, only a charge area is irradiated by the main eraser.

REFERENCES:
patent: 3877803 (1975-04-01), Seliger
patent: 4678134 (1987-07-01), Ameur
patent: 4711559 (1987-12-01), Sambayashi
patent: 4739368 (1988-04-01), Lachut et al.
patent: 4811045 (1989-03-01), Matsushita et al.
patent: 4821067 (1989-04-01), Oushiden et al.
patent: 4873552 (1989-10-01), Otsuki
patent: 4998138 (1991-03-01), Sambayashi et al.

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