Patent ID: 6763203
Filing Date: 2004-07-13
Classification: G03G

Abstract:
An image forming apparatus comprising:an image bearing member; a transfer member for transferring an image from said image bearing member to a recording material; and fixing means for fixing the transferred image onto the recording material, said fixing means including a heating member and back-up roller for forming a nip in cooperation with said heating member, wherein said back-up roller includes a conductive material containing layer, wherein said image forming apparatus is selectively operable in a normal mode if the recording material is paper and in a resin sheet mode if the recording material is a resin sheet, wherein said image forming apparatus includes transfer bias control means for controlling a voltage applied to said transfer member, and said transfer bias control means sets the voltage in accordance with a resistance value of said transfer member and a selected mode, and wherein a voltage applied to said transfer member when the resin sheet mode is selected is lower than a voltage applied to said transfer member when the normal mode is selected such that current flowing from the resin sheet to said back-up roller decreases when the resin sheet is nipped by the nip.