| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image forming apparatus capable of obtaining an excellent copied image by preventing a void caused by discharge due to high potential of a recording medium when transferring. <P>SOLUTION: When a transfer paper sheet 147 having a high resistance value is fed to a secondary transfer part 100, a conductive auxiliary bias roller 110 to which bias voltage is applied from an independent bias power source 111 is made to abut on a counter roller 130, whereby the surface potential of the counter roller 130 has the same electrification amount as the transfer paper sheet 147 in accordance with the level of the surface potential of the transfer paper sheet 147 so as to eliminate a potential difference between them and restrain the occurrence of discharge, whereby failure is eliminated. <P>COPYRIGHT: (C)2008,JPO&INPIT |
