Image forming apparatus and method of determining degradation of charging property of developer
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United States of America Patent
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May 3, 2011
Grant Date -
Apr 5, 2007
app pub date -
Sep 12, 2006
filing date -
Sep 30, 2005
priority date (Note) -
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Abstract
A photosensitive layer of a photosensitive drum is charged and a surface of the photosensitive layer is exposed at a specified density and then a development bias is applied to a development roller. An absolute value of a detection voltage is obtained from a development current sensor. It is determined whether the obtained absolute value of the detection voltage is less than a threshold which is set in advance, whereby a determination is made as to whether the charging property of toner is degraded.
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