| 摘要 |
PURPOSE:To utilize a photosensitive body so as to continuously obtain excellent images by transferring the image, which is developed by being electrified in an opposite polarity after developing an electrostatic latent image formed on the electrified photosensitive body, on a transfer sheet, electrifying in the polarity same as the beginning after destaticizing the photosensitive body and repeating the process after the electrification of the opposite polarity. CONSTITUTION:The photosensitive drum 1 is uniformly electrified by a 1st corona charger 2 to obtain a certain surface potential of the specified negative polarity and image exposure is performed to form the electrostatic latent image, which is developed by a magnetic brush developing device 4. Next, the photosensitive body 1 is uniformly electrified with the opposite polarity to that of the 1st corona charger by a 2nd corona charger 5 to electrify a light radiated part in a positive polarity and the developed image is transferred on the transfer sheet 8 by a transfer roller 9. Since the photosensitive drum 1 is exposed by an eraser lamp 11 and only positive charge without sensitivity remains on the photosensitive body 1, the light radiated part is destaticized by the 1st corona charger 2 to electrify a light non-radiated part in the negative. In and after second image formation, the electrostatic latent image already formed is developed and the electrification by the 2nd corona charger 5 and the transfer by the transfer roller 9 are successively performed to obtain a second copy. Thus, the excellent images can be continuously obtained. |
