IMAGE FORMING APPARATUS, IMAGE FORMING METHOD, AND COMPUTER PROGRAM PRODUCT

摘要

An image forming apparatus includes: a transfer-sheet conveying member that rotates to convey a transfer sheet; a first image forming unit that directly transfers a color image onto the transfer sheet; an intermediate transfer member that rotates while an image is transferred thereon; a second image forming unit that transfers images onto the intermediate transfer member; a secondary transfer unit that transfers the images on the intermediate transfer member onto the transfer sheet; a measuring unit that measures a surface velocity of the transfer-sheet conveying member and the intermediate transfer member; and a control unit that performs phase matching control by accelerating or decelerating the transfer-sheet conveying member or the intermediate transfer member so as to match a phase of fluctuation of the measured surface velocity of the transfer-sheet conveying member and a phase of fluctuation of the measured surface velocity of the intermediate transfer member.