High voltage comparator for photoreceptor voltage control

Details High voltage comparator for photoreceptor voltage control High voltage comparator for photoreceptor voltage control

1981-06-19

1983-11-29

Braun, Fred L.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

250324, 355 3CH, 361235, G03G 1500

Patent

active

044178042

ABSTRACT:
A photoreceptor voltage control having a comparator circuit for determining the error between the photoreceptor voltage and the desired voltage. The photoreceptor voltage is detected by a non-contacting detector and the photoreceptor voltage signal is fed directly to the comparator circuit which determines if the error is too positive, too negative or within acceptable limits. This information is then fed by a DC isolation system to the machine logic control which in turn corrects a corona supply voltage to obtain the desired photoreceptor voltage.

REFERENCES:
patent: 3586908 (1971-06-01), Vosteen
patent: 3678350 (1972-07-01), Matsumoto et al.
patent: 3699388 (1972-10-01), Ukai
patent: 3763410 (1973-10-01), Phillips
patent: 3805069 (1974-04-01), Fisher
patent: 3934141 (1976-01-01), Vargas
patent: 3950680 (1976-04-01), Michaels
patent: 3970920 (1976-07-01), Braun
patent: 3976880 (1976-08-01), Brunelle et al.
patent: 3976881 (1976-08-01), Parker
patent: 4086650 (1978-04-01), Davis
patent: 4166690 (1979-09-01), Bacon et al.
patent: 4167325 (1979-09-01), Plumadore
patent: 4326796 (1982-04-01), Champion et al.
patent: 4346986 (1982-08-01), Kuge et al.
patent: 4348099 (1982-09-01), Fantozzi

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