Electrophotography – Control of electrophotography process – Control of transfer
Reexamination Certificate
2006-07-04
2006-07-04
Grainger, Quana (Department: 2852)
Electrophotography
Control of electrophotography process
Control of transfer
C399S101000
Reexamination Certificate
active
07072599
ABSTRACT:
An electrostatographic printing apparatus comprises a charge receptor, and a transfer station for transferring a toner image from the charge receptor to a sheet by providing an electric field of predetermined magnitude at a transfer zone. The transfer station includes a rotatable transfer member, with a cleaning corotron associated therewith. A control system for maintaining a constant current at the transfer zone takes into account a current supplied by the cleaning corotron. The control system can also take into account current leakages associated with the transfer member.
REFERENCES:
patent: 4407580 (1983-10-01), Hashimoto et al.
patent: 5623330 (1997-04-01), Ishibashi
patent: 5631725 (1997-05-01), Harasawa et al.
patent: 5930573 (1999-07-01), Miyamoto et al.
patent: 2004/0213598 (2004-10-01), Mori et al.
DiRubio Christopher A.
Fletcher Gerald M.
McGrath Rachael L.
Thayer Bruce E.
Zona Michael F.
Grainger Quana
Hutter R.
Xerox Corporation
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