| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming device making the surface potential possible to be stabilized from a primary rotation of a photoreceptor, thus, the excellent image possible to be obtained, and the first copying possible to be quickened. SOLUTION: In a digital copying machine adopting the photoreceptor with inferior rise property of the charge, as the photoreceptor drum 15, such as an OPC (organic group photoreceptor) for the digital copying machine, the introduced current value of a pre-cleaning charger 51 at the primary rotation of the photoreceptor drum 15, is tuned corresponding to the property of the photoreceptor drum 15 depending on the number of copying sheets, the drum intermission time, and the drum temp. In such a manner, the surface potential of the photoreceptor drum 15 is stabilized from the primary rotation thereof. |
