Electrophotography – Having particular structure – Modular or displaceable
Reexamination Certificate
2005-10-25
2009-08-18
Le, Hoa V (Department: 1795)
Electrophotography
Having particular structure
Modular or displaceable
C399S111000, C399S119000, C430S111300
Reexamination Certificate
active
07577377
ABSTRACT:
In a developing device of the present invention, the ratio of the volume of a two-ingredient type developer to the capacity of a space storing the developer is selected to range from 40% to 75%. A carrier, forming part of the developer, is made up of a core and a resinous coating layer formed on the core. The resinous coating layer contains conductive particles each having a tin dioxide layer formed on a core and an indium oxide layer formed on the tin dioxide layer and containing tin dioxide. The conductive particles are provided with an oil absorbing amount ranging from 10 ml/100 g to 300 ml/100 g.
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Miyamoto Satoru
Yasuda Makoto
Le Hoa V
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Ricoh & Company, Ltd.
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