Image forming apparatus including calculating portion configured to calculate surface potential of image bearing member
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United States of America Patent
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Apr 12, 2016
Grant Date -
May 14, 2015
app pub date -
Nov 11, 2014
filing date -
Nov 12, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
An image forming apparatus includes: a charging member; a transfer member; a setting portion for setting a positive-side discharge start voltage when a positive-side voltage relative to a reference potential is applied to the transfer member after a voltage is applied to the charging member so that a surface of the image bearing member is charged to the reference potential by the charging member and for setting a negative-side discharge start voltage when a negative-side voltage relative to the reference potential is applied to the transfer member after the voltage is applied; a calculating portion for calculating a correction amount for correcting a light portion surface potential, of the image bearing member, calculated by the calculating portion on the basis of the positive-side and negative-side discharge start voltages; and a correcting portion for correcting the light portion surface potential by using the correction amount.
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