Electrophotography – Internal machine environment – Particle or contaminant control
Reexamination Certificate
2011-08-09
2011-08-09
Porta, David P (Department: 2884)
Electrophotography
Internal machine environment
Particle or contaminant control
C399S115000
Reexamination Certificate
active
07995947
ABSTRACT:
The invention provides a charging device used in an image forming apparatus such as a copier, a fax machine, a printer or the like, the charging device including: a gold-plated discharge wire for charging an image carrier such as a photoconductive member or the like; and a cleaning member, having an abrasive, for cleaning the discharge wire, with the gold plating being maintained over time satisfactorily, and provides a process cartridge having this charging device. The cleaning member has an abrasive containing alumina and/or silicon, the grain size of which ranges from #6000 to #8000. The discharge wire is a tungsten wire on which a plating film is formed by gold plating, such that the thickness of the plating film is not smaller than 1.5 μm, and the diameter of the tungsten wire is not smaller than 30 μm.
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Akiba Yasushi
Hatori Satoshi
Kosuge Akio
Muraishi Takaya
Shintani Takeshi
Boosalis Faye
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Porta David P
Ricoh & Company, Ltd.
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