Illumination system

Details Illumination system Illumination system

1975-03-10

1976-12-21

Peters, Jr., Joseph F.

Photocopying

Including fiber optics

315201, 315324, 355 69, 355 70, G03G 1504

Patent

active

039985393

ABSTRACT:
An electrophotographic copying machine having a moving photoconductive member, in which an original document is illuminated by a pair of light sources, which are energized alternately to illuminate the document at a frequency of 240 hertz. This frequency of illumination prevents visible lines in the copy.

REFERENCES:
patent: 2859387 (1958-11-01), Ulffers
patent: 3540806 (1970-11-01), Starkweather
patent: 3609038 (1971-09-01), Koishorn
patent: 3775006 (1973-11-01), Hartman et al.

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