Image forming apparatus
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United States of America Patent
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May 26, 2015
Grant Date -
Sep 11, 2014
app pub date -
Feb 18, 2014
filing date -
Mar 5, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A controller controls a replenishing operation of the first replenishing device based on the first sensor, and controls a replenishing operation of the second replenishing device based on the second sensor. The controller prohibits the replenishing operation of the first replenishing device when the developer concentration in the first replenishing device reaches a first upper limit set to the first developing device, and the controller prohibits the replenishing operation of the second replenishing device when the developer concentration in the second replenishing device reaches a second upper limit set to the second developing device. The controller corrects the second upper limit based on the developer concentration in the second developing device when the developer concentration in the first developing device reaches the first upper limit.
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