| 摘要 |
<P>PROBLEM TO BE SOLVED: To collect a deposited substance deposited on a cleaning object while sufficiently suppressing degradation of the cleaning object such as a conveying belt. Ž<P>SOLUTION: When a first detection current value flowing between the conveying belt 13 and a cleaning roller 21 becomes equal to or greater than a first predetermined value, a voltage smaller than that before the first detection current value becomes equal to or greater than the first predetermined value is used as a print time target voltage which is used at the cleaning treatment time. Thus, even when it greatly fluctuates due to the environment in which an image forming apparatus is installed and the use frequency or the like, the deposited substance such as developer, deposited on the conveying belt 13 can be collected while sufficiently retarding the progress of the degradation of the conveying belt 13. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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