| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent a recording material from being wrapped around a pressure roller due to toner accumulation. <P>SOLUTION: The image forming apparatus has a cleaning mode for repeating two or more times a control step in which a recording material is held in a fixing nip, driving is stopped, the fixing nip is heated and cooled, and then the recording material is conveyed. The image forming apparatus has a pressing force alteration means for altering a pressing force, and also a pressing force determination means for determining the pressing state. In the image forming apparatus, heating temperature/time, cooling temperature/time, or an amount of step conveyance in the cleaning mode is altered according to the pressing state. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
