Photocopying – Contact printing – Light boxes
Patent
1989-09-05
1991-04-16
Pendegrass, Joan H.
Photocopying
Contact printing
Light boxes
355225, G03G 1502, G03G 1504
Patent
active
050087070
ABSTRACT:
Apparatus and method for forming an electrostatic latent image on an imaging member having a photoconductive insulating layer has a voltage sensitive corona charging device with a corona generating electrode and a control electrode positioned in charging relationship to the photoconductive insulating layer, means to energize the charging device to charge the photoconductive insulating layer to a first level comprising means to apply a corona generating voltage to the corona generating electrode and to apply a control voltage of a first magnitude to the control electrode, and means to expose the photoconductive insulating layer to an image pattern simultaneously while the charging device is energized.
REFERENCES:
patent: 3307034 (1967-02-01), Bean
patent: 3886416 (1975-05-01), Gallo, Jr.
patent: 4298669 (1981-11-01), Marushima et al.
patent: 4311778 (1982-01-01), Kadowaki et al.
patent: 4372669 (1983-02-01), Fantuzzo et al.
patent: 4444859 (1984-04-01), Mimera
patent: 4841146 (1989-06-01), Gundlach et al.
Xerox Disclosure Journal Writeup for Donald C. Van Horne et al., titled "Xerographic Cycling Process", vol. 5, No. 4, Jul./Aug. 1980.
Ewing Joan R.
Wiedrich Donald E.
Pendegrass Joan H.
Xerox Corporation
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