Electrophotography – Control of electrophotography process – Control of charging
Reexamination Certificate
2005-07-13
2008-07-22
Gray, David M (Department: 2852)
Electrophotography
Control of electrophotography process
Control of charging
C399S171000
Reexamination Certificate
active
07403728
ABSTRACT:
System and methods may calibrate an AC rms voltage applied to a coronode of a charging device to achieve a predefined operating current at a target value of DC shield voltage. The target value of DC shield voltage may be set to be substantially below an over-voltage condition. System and methods may use a calibration routine that may determine a minimum AC voltage required to achieve the target value of DC shield voltage. Systems and methods may alternatively, or additionally, sense current and adjust the applied voltage to obtain a target current.
REFERENCES:
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patent: 06266247 (1994-09-01), None
Adams Jerry Floyd
Claflin Alfred James
Fletcher Gerald M.
O'Brien John F.
Parks Bruce J.
Gray David M
Oliff & Berridg,e PLC
Villaluna Erika J.
Xerox Corporation
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