Electrophotographic copying apparatus

Details Electrophotographic copying apparatus Electrophotographic copying apparatus

1985-01-22

1986-09-16

Moses, R. L.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 7, G03G 1500

Patent

active

046119060

ABSTRACT:
An electrophotographic copying apparatus of the present invention is capable of copying a reduced original and forms an electro-static latent image of the reduced original image on a uniformly electrified photosensitive member so that the electrostatic latent image is sensible-imaged as a toner image and the toner image is transferred onto copying paper. In such operation, this apparatus can change corresponding to reduction rate the irradiation area of a side erase lamp for erasing unnecessary charge at both axial edge portions of photosensitive member, thereby enabling complete removal of unnecessary electrified portions on the photosensitive member which appear inevitably when the reduced copying is carried out, and reliable prevention of attaching of unnecessary toner to the photosensitive member.

REFERENCES:
patent: 3724940 (1973-04-01), Koizumi
patent: 3792913 (1974-02-01), Simmons
patent: 3809472 (1974-05-01), Liechty
patent: 3901593 (1975-08-01), Kogiso et al.
patent: 3967896 (1976-07-01), Looney et al.
patent: 4215929 (1980-08-01), Sato et al.

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