| 摘要 |
PURPOSE:To suppress the occurrence of all sorts of irregularities and to improve the quality of a full color image by separating low and high density parts at each color, executing a copying process, and simultaneously, carrying out a slit-like full surface exposure on the surface of a photosensitive body only on the low density part. CONSTITUTION:The image forming processes of color resolution, toner development, a transfer, etc., are carried out in such a manner that the low and high density parts are separated at each color, and simultaneously, a slit-like exposure is uniformly carried out on the surface of the photosensitive body between an electrifying part and a developing part, when the image forming process of the low density part is executed. In other words, in the copying process of the low density part side on the copying processes of tow times, a slit-like full surface exposing device 16 is provided between electrifying and exposing processes and the slit-like full surface exposure is carried out on the photosensitive drum 1 uniformly electrified by an electrifier 15. Thus, a difference between the base fogging of a slit-like electrifying part and that of an image part is increased, influence caused by the sensitive irregularity of the photosensitive body, the brightness irregularity of an optical system, an electrifying irregularity, etc., are avoided, and a density irregularity is resolved to obtain a stable low density image. |
