Patent ID: 8774670
Filing Date: 2014-07-08
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a charging unit configured to charge a surface of a photosensitive member; a driving unit configured to rotatively drive the photosensitive member; a shielding member configured to shield the photosensitive member from said charging unit; a moving unit configured to move said shielding member between a shielding position at which said shielding member shields the photosensitive member from said charging unit and a retracting position at which said photosensitive member and said charging unit are opened to each other; a detection unit configured to detect a position of said shielding member; and a control unit configured to, when power supply is turned on, control a time period for which the photosensitive member is rotated by said driving unit according to the position of said shielding member detected by said detection unit, wherein when the power supply is turned on, said control unit controls said driving unit to rotate the photosensitive member for a first time period when said detection unit detects said shielding member being at the shielding position, and controls said driving unit to rotate the photosensitive member for a second time period longer than the first time period when said detection unit detects said shielding member being not at the shielding position.