| 摘要 |
PROBLEM TO BE SOLVED: To obtain an excellent outputted image over a long term by restraining the wear of the part of a photoreceptive layer on the surface of a photoreceptor drum abutting on a paper edge. SOLUTION: When it is assumed that transfer voltage at the center part in the longitudinal direction of a transfer roller 4 is A and transfer voltage in the range of the length (L) of taper from the leading end (paper edge position) in an orthogonal direction to the inserting direction of transfer material P inserted through a transfer nip part to the longitudinal center direction of the roller 4 is B, the length L of the taper is set in the range of 10 (mm)<=L<=70 (mm), relation between the transfer voltage A and the transfer voltage B satisfies A>B, and the roller 4 is made to abut on the photoreceptor drum 1, whereby a black stripe is not formed and excellent transfer performance and carrying performance are obtained. |
