Electrophotography – Diagnostics – Consumable
Reexamination Certificate
2005-09-19
2008-12-02
Gray, David M (Department: 2852)
Electrophotography
Diagnostics
Consumable
C399S030000, C399S279000, C399S285000
Reexamination Certificate
active
07460798
ABSTRACT:
An image forming apparatus has a developer container containing a developer and a developer carrying member for carrying the developer and adapted to switch an AC voltage to be applied to the developer carrying member. The apparatus includes a detecting member for detecting the amount of developer in the developer container and a processing portion for determining the amount of developer in the developer container according to the value output by the detecting member when the AC voltage is applied to the developer carrying member. The processing portion is adapted to determine the amount of developer by executing a process that corresponds to the operation of switching the AC voltage.
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Chinese Office Action for Application No. 2005101051868 issued Nov. 30, 2007.
Hasegawa Hideaki
Shoji Takeo
Sunahara Satoshi
Toda Atsushi
Canon Kabushiki Kaisha
Evans Geoffrey T
Fitzpatrick ,Cella, Harper & Scinto
Gray David M
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