Image forming apparatus with image erasing lamp

Details Image forming apparatus with image erasing lamp Image forming apparatus with image erasing lamp

1987-10-06

1990-05-22

Grimley, Arthur T.

Photocopying

Contact printing

Light boxes

355 40, G03G 1500

Patent

active

049281437

ABSTRACT:
An image forming apparatus such as a copier includes not only an image erasing lamp having a plurality of point light sources which can be individually switched on and off and input keys by which a region can be specified but also a control unit which is so programmed that the point light sources are switched on and off during a copying process as the copier's photosensitive drum rotates and charges can be cancelled within a frame-shaped region on the photosensitive drum around a boundary defined by the input keys.

REFERENCES:
patent: 4582417 (1986-04-01), Yagasaki et al.
patent: 4707110 (1987-11-01), Harada et al.
patent: 4740818 (1988-04-01), Tsilibes et al.

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