Image forming apparatus and method of detecting amount of residual developer
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United States of America Patent
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Oct 11, 2011
Grant Date -
Feb 26, 2009
app pub date -
Oct 20, 2008
filing date -
Sep 30, 2004
priority date (Note) -
In Force
status (Latency Note)
Importance
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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