Photocopying – Contact printing – Light boxes
Patent
1992-01-31
1993-04-06
Grimley, A. T.
Photocopying
Contact printing
Light boxes
324452, 361230, 355210, 355219, 355246, G03G 1500
Patent
active
052007804
ABSTRACT:
A method of adjusting a surface potential sensor for measuring the surface potential of a photoconductive element, or image carrier, included in an electrophotographic image forming apparatus. The method uses the substrate of the photoconductive element as a reference plate in the event of adjustment. Before the photoconductive element is used as a reference plate, the element is left unused for a period of time long enough for the element to recover from fatigue. Then, a reference voltage is applied to the substrate, and the resulting potential of the surface of the photoconductive element is used as a reference value for adjustment.
REFERENCES:
patent: 3998538 (1976-12-01), Urso et al.
patent: 4127806 (1978-11-01), Shuey et al.
patent: 4474455 (1984-10-01), Hirakura et al.
patent: 4591262 (1986-05-01), Oseto et al.
patent: 4797707 (1989-01-01), Iwahashi et al.
patent: 4970557 (1990-11-01), Masuda et al.
Dang T. A.
Grimley A. T.
Ricoh & Company, Ltd.
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