| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming device capable of suppressing black spots, jitters or density unevenness caused by vibration of a transfer roller. SOLUTION: The transfer roller 10 is driven at a prescribed speed difference from a photoreceptor drum 7, and a driving force is input from driving gears 56, 57 which are coaxial with the photoreceptor drum 7 into transfer gears 54, 55 which are coaxial with the transfer roller 10. The transfer roller 10 has a reverse crown shape, wherein a portion corresponding to a prescribed paper size width in the axial direction has a fixed outer diameter, and the outer diameter to the furthermore both end sides than the portion is gradually enlarged toward the axial direction outside. COPYRIGHT: (C)2011,JPO&INPIT |
