| 摘要 |
PROBLEM TO BE SOLVED: To obtain an excellent image provided with high sensitivity, together with durability over a long period, by applying the electric charge by AC electric field through a surface side of a conductive supporting body in a cylindrical shape during an electrification stage after development. SOLUTION: This device is constituted that, an organic photoreceptor drum 10 provided with a photosensitive layer laminated on an under coating layer on the conductive supporting body of the cylindrical shape is adopted, the image formed by electrification, the image exposure and development is transferred onto a transfer paper P, the transfer paper P is separated from the photoreceptor drum 10 thereafter, and the photoreceptor drum 10 is cleaned, In the mean time, during the electrification stage by an electrification device 11 after developing by the developing device 13, the electric charge is applied by the AC electric field through the surface side of the photoreceptor drum 10 by a corona electrode 23 connected with an AC power source 24. At this time, the surface electrification potential of the photoreceptor drum 10 is set so as to become between 0 and the electrification potential (equal to or above 500V) of the photoreceptor drum 10. Moreover, a largeness of electrifying is preferably made to the largeness capable of lowering the electrification potential VH below 1/2 VH, on the point of rising the residual potential and increasing dark decay. |
