| 摘要 |
PURPOSE:To prevent sticking of positively-electrified carrier to a photosensitive drum which, when the door of a device is opened or the main power source of the device is shut off during the image forming operation, occurs since a negatively-electrified part on the photosensitive drum continuing to turn by means of the inertia of a driving system faces a developing sleeve. CONSTITUTION:The sticking of carrier to the surface of the photo-sensitive drum 1 is prevented by applying a -600V voltage, which is equal to that applied during the development, to the developing sleeve 21 during the time that the photosensitive drum 1 rotates only an angle of theta degrees by means of inertia after the supply of a voltage to the main drive motor is stopped during the image forming operation. |
