Electrophotography – Control of electrophotography process – Control of developing
Reexamination Certificate
2007-07-12
2009-12-08
Gray, David M (Department: 2852)
Electrophotography
Control of electrophotography process
Control of developing
C399S029000, C399S254000
Reexamination Certificate
active
07630660
ABSTRACT:
A method and apparatus for charging toner for an imaging device includes an inactivity determining section that determines one or more periods of inactivity of the printing machine, a measuring section that measures a charge of the toner, and a charging section that charges the toner to a predetermined level based on at least one of the determined one or more periods of inactivity and the measured charge of the toner. The toner is charged to a predetermined level after recovery from the inactivity period so that the tribo-electric charge of the toner is enhanced for normal printing without causing unwanted effects when the imagining device recovers from inactivity.
REFERENCES:
patent: 5194895 (1993-03-01), Bares
patent: 6463224 (2002-10-01), Phillips
patent: 7149437 (2006-12-01), Okubo
patent: 2003/0118377 (2003-06-01), Hirano
Fekete Barnabas T
Gray David M
Oliff & Berridg,e PLC
Xerox Corporation
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