| 摘要 |
A developing apparatus includes a developer carrying member, provided in an opening of a developer container, for carrying a developer to a developer position. A leakage preventing member is supplied with a voltage from a voltage source having the same polarity as a charging property of the developer to prevent leakage of the developer from a longitudinal end of the developer carrying member. The developing apparatus is movable between an operative position for development where the voltage is capable of being applied and an inoperative position where the voltage is incapable of being applied. A discharging device electrically discharges the leakage preventing means after a start of movement from the operative position toward the inoperative position and before returning to the operative position. A capacitor, electrically is connected to the leakage preventing member, for accumulating electric charge supplied from said voltage source.
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