Electrophotographic apparatus

Details Electrophotographic apparatus Electrophotographic apparatus

1987-07-16

1988-06-07

Prescott, A. C.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 3CH, G03G 1500

Patent

active

047500190

ABSTRACT:
An electrophotographic apparatus adopts the reversal developing system where an electrostatic latent image charged in the positive polarity on the surface of a photosensitive drum by toner charged in the same positive polarity. The photosensitive drum is composed of Se series or OPC (organized photo-conductor) series material, and a discharging light source and a charging corotron which are installed in a common cover are disposed on the peripheral side surface of the photosensitive drum. The charging corotron is disposed downstream from the discharging light source in a direction of rotation of the photosensitive drum. In the common cover, a partition through which part of light of the discharging light source leaks to an area charged by the charging corotron is installed between the discharging light source and the charging corotron. Accordingly, on part of the surface of the photosensitive drum, discharging and charging are performed in an overlapped manner.

REFERENCES:
patent: 4470693 (1984-09-01), Dolan
patent: 4542981 (1985-09-01), Anzai et al.
patent: 4678317 (1987-07-01), Grossinger
patent: 4695723 (1987-09-01), Minor

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