Patent ID: 6477349
Filing Date: 2002-11-05
Classification: G03G

Abstract:
A color image forming apparatus comprising:(a) a plurality of image forming units arrayed, each unit having a photosensitive body carrying a toner image, and each unit forming an image of a different colored toner from each other; (b) a loop type intermediate transfer belt, disposed allowable to contact to the photosensitive body, and on which the toner image is transferred; (c) a transfer roller, disposed in the loop of said intermediate transfer belt, for transferring a toner image formed on said belt onto a recording sheet, said transfer roller provides said belt with tension; (d) a driving roller, disposed in the loop of said intermediate transfer belt and confronting said transfer roller, for rotating said belt, said belt is rotatably held by said transfer roller and said driving roller; and an urging roller, disposed outside the loop of said intermediate transfer belt and confronting said transfer roller, for nipping the recording sheet with said belt, wherein when said transfer roller provides said belt with the tension, said transfer roller and said urging roller urge against each other, and when the tension is released, said urging roller is removed from said transfer roller.