Electrophotographic printer determining transfer voltage from vo

Details Electrophotographic printer determining transfer voltage from vo Electrophotographic printer determining transfer voltage from vo

1998-11-13

2000-04-25

Moses, Richard

Electrophotography

Control of electrophotography process

Control of transfer

399 9, 399 89, 399313, G03G 1514, G03G 1500

Patent

active

060553898

ABSTRACT:
The transfer voltage supplied to the transfer roller in an electrophotographic printer is determined by feeding current to the transfer roller and reading the voltage produced by passage of the current through the transfer roller. Whether the transfer roller is adequately charged is determined by comparing the voltage reading with a previous voltage reading. The voltage reading is preferably an average reading taken over one revolution of the transfer roller. Alternatively, separate voltage readings are taken for different radial sectors of the transfer roller, and the transfer voltage is determined separately for each radial sector.

REFERENCES:
patent: 5034777 (1991-07-01), Ohzeki et al.
patent: 5151736 (1992-09-01), Ohzeki et al.
patent: 5179397 (1993-01-01), Ohzeki et al.
patent: 5196885 (1993-03-01), Takeuchi et al.
patent: 5682575 (1997-10-01), Komori

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