| 摘要 |
PURPOSE:To eliminate the movement of a charge in a photosensitive layer, and also, to prevent the generation of a void contamination, etc., in an image, by emitting and irradiating a laser to a part of an unelectrified area and the low potential area of the peripheral surface of a photosensitive body device, and adjusting the light quantity of a laser beam. CONSTITUTION:In accordance with a driving signal S11, a photosensitive drum device 3 starts a rotation in the direction as indicated with an arrow A. An electrifying operation by a primary electrifying device 4 is executed by a primary electrifying signal S12. An image exposing operation by a laser scanner 2 is started by being delayed by the time T when the device 3 requires for one rotation, from the start of the primary electrifying operation, by an image exposing signal S13. A developing bias operation is started by a developing bias signal S14, and a transfer electrifying operation is started by a transfer electrifying signal S15. The light quantity adjusting operation of a laser beam is started after the rotational operation of the device 3, and ended before the time t3 which is required for making the device 3 reach the image exposing positioning from the primary electrifying device elapses. In this way, the movement of a charge in the photosensitive layer is eliminated, and also, the void contamination, etc., can be prevented. |
