| 摘要 |
PURPOSE:To prevent ground contamination generated due to a fact that the surface potential of image formation of several times from the beginning is higher than the surface potential of a stable state, and to save a machine material by rotating a photosensitive body at a lower speed than rotation at the time for forming an image, and executing electrification, corona destaticization and light destaticization until a fixing means of a heat fixation is warmed up and becomes operable, before starting an operation of each process. CONSTITUTION:A warm-up containing each process of electrification of a rotating photosensitive body, formation and development of an electrostatic latent image, transfer and heat fixation of a transfer material, corona destaticization, cleaning of a residual developer, and light destaticization of residual static electricity is executed for about 30sec until a heat roller rises to a prescribed roller. Therefore, the photosensitive body is rotated at a lower speed V2 than a speed V1 at the time for forming an image, and first of all, the same voltage as that at the time for forming an image is applied to a transfer electrifier 5 and it is electrified. Subsequently, the same voltage as that of the time for forming an image is applied to a corona destaticizer and electrifier 6 and destaticized, to which light of the same illumination as illumination of a destaticizing exposure at the time for forming an image is irradiated by an erasing lamp 8, and destaticized and exposed. A warm-up is executed by repeating these processes. Accordingly, an electrifying quantity and a destaticizing exposure quantity per one rotation of the photosensitive body become more than those at the time for forming an image. In this way, the consumption of a machine material and electric power is saved. |
