| 摘要 |
PURPOSE:To perform the destaticization and separation of a transferring material from an image carrier surface stably and easily, by detecting the surface potential of the image carrier surface after latent image formation, and calibrating and controlling the output of a transferring material destaticization and separation electrostatic charger to a proper output according to the detected value. CONSTITUTION:The transferring material P to which an image on a drum 1 is transferred by a transfer electrostatic charger 6 is discharged by the transfer material destaticization separation electrostatic charger 8 to the opposite polarity and separated from the surface of the drum 1 successively. A potential sensor 12 detects the surface potential of the surface 1 of the drum after latent image formation and its signal is inputted to an arithmetic circuit 14 to calculate a proper control value corresponding to the detected surface potential, controlling the transformer 81 of the separation electrostatic charger 8. Consequently, an impressed voltage is varied according to the image state of an original to perform the destaticization and separation of the transferring material P from the drum surface easily and stably, and variation in transfer efficiency is eliminated. |
