Photocopying – Contact printing – Light boxes
Patent
1992-12-22
1994-10-25
Grimley, A. T.
Photocopying
Contact printing
Light boxes
250324, 324455, 324713, 355221, 355225, 361225, G03G 2100
Patent
active
053593936
ABSTRACT:
A photoreceptor charging device, already provided in an electrophotographic printing machine, is used to determine the voltage potential of a portion of the photoreceptor located adjacent to the photoreceptor charging device. In particular, an operating condition of the photoreceptor charging device, such as, for example, the total current supplied to a coronode and to a grid of the photoreceptor charging device, or the voltage potential of the grid of the photoreceptor charging device when the total current is a predetermined, relatively small value, is used to determine the voltage potential of the photoreceptor adjacent to the charging device.
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Grimley A. T.
Royer William J.
Xerox Corporation
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