| 摘要 |
PURPOSE:To make the surface potential of a photosensitive body uniform and to prevent an image defect during next image formation by turning off a primary electrostatic charger, transfer charger, and preliminary exposing means in order when the photosensitive body is stopped after image formation. CONSTITUTION:While the primary electrostatic charger 4 is turned off at a point T6 of time after the surface part of the photosensitive body which is transferred and charged electrostatically at time T5 of the end of transfer passes through the primary charger, a switch 17 is placed at the side of a power source 15 to adjust a current so that the surface potential of the photosensitive body after the transfer of the transfer charger 12 is nearly zero. Then, the operation of the charger 12 is stopped when the surface part of the photosensitive body which is charged by the primary charger 4 reaches a transfer position T at time T6, or at time T7 after it. The potential of the entire periphery of the photosensitive body is lowered almost to zero by the transfer charger 12 at this point of time. A light source 3 turns off when the surface part charged by the primary charger 4 reaches the preliminary exposure part P at time T7, or at time T8 after it. Thus, an image defective during next image formation is prevented. |
