Electrophotographic image forming apparatus having a charge remo

Details Electrophotographic image forming apparatus having a charge remo Electrophotographic image forming apparatus having a charge remo

1995-04-10

1996-07-09

Pendegrass, Joan H.

Photocopying

Contact printing

Light boxes

355211, G03G 506, G03G 2100

Patent

active

055349803

ABSTRACT:
An image forming apparatus includes a rotatable photosensitive member including a conductive base and an organic photosensitive film located on a surface of the base and containing two charge generation materials which have different light absorbing characteristics from each other and different wavelengths showing a maximum light absorbance from each other; a charging device for charging the organic photosensitive film, the charging device being located in the vicinity of the photosensitive member; a charge removing member including a light source for radiating light toward the organic photosensitive film to uniformize the potential of a surface of the organic photosensitive film, the light having a wavelength in the range between wavelengths corresponding to half of a maximum light absorption of at least one of the two charge generation materials; an exposing device for radiating light corresponding to an image toward the organic photosensitive film charged by the charging device; and a developing device located downstream with respect to the exposing device in a rotation direction of the photosensitive member. The residual carriers in the organic photosensitive film are reduced, and thus the image quality is significantly improved.

REFERENCES:
patent: 4974964 (1990-12-01), Yoshihara et al.
patent: 5272504 (1993-12-01), Omura et al.

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