Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1984-03-07
1985-09-24
Grimley, A. T.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
355 14CH, 355 14D, 355 14R, 355 30, G03G 1500, G03G 1506
Patent
active
045429812
ABSTRACT:
An electrophotographic copying machine is provided having a photoreceptor, a corona discharger, a lamp, and a compensation circuit. The corona discharger is activated to provide a corona discharge toward the photoreceptor to uniformly and initially charge the surface of the photoreceptor. The lamp is illuminated at the same time as the corona discharge of the corona discharger to improve the charging on the photoreceptor. The compensation circuit is activated to provide an exponential voltage to be applied to the lamp in proportion to the sensitivity degradation of the photoreceptor, to thereby compensate the sensitivity degradation of the photoreceptor.
REFERENCES:
patent: 3666363 (1972-05-01), Tanaka et al.
patent: 4408871 (1983-10-01), Kojima
patent: 4416536 (1983-11-01), Itoh et al.
patent: 4431301 (1984-02-01), Hashimoto et al.
patent: 4432634 (1984-02-01), Tabuchi
patent: 4433297 (1984-02-01), Buchheit
patent: 4445772 (1984-05-01), Aoki et al.
patent: 4448512 (1984-05-01), Bean
patent: 4451137 (1984-05-01), Farley
Anzai Shunju
Imanaka Yoshiaki
Flower Terry
Grimley A. T.
Sharp Kabushiki Kaisha
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