Electrophotographic image forming apparatus with reversal develo

Details Electrophotographic image forming apparatus with reversal develo Electrophotographic image forming apparatus with reversal develo

1991-02-08

1991-09-17

Grimley, Arthur T.

Photocopying

Contact printing

Light boxes

346160, 355223, 355271, G03G 1502

Patent

active

050499351

ABSTRACT:
An electrophotographic image forming apparatus with reversal development system, wherein a photosensitive member is charged to first polarity by a first charger and then charged to second polarity opposite to the first polarity by a second charger which is provided at downstream side of the first charger with respect to the rotational direction of the photosensitive member prior to an image formation so as to form uniform images regardless of the number of image formation.

REFERENCES:
patent: 4139942 (1979-01-01), Nakahata et al.
patent: 4591262 (1986-05-01), Oseto et al.
patent: 4623243 (1986-11-01), Iijima et al.
patent: 4757345 (1988-07-01), Ohashi et al.
patent: 4914457 (1990-04-01), Fukatsu et al.

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