| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image forming apparatus in which a cleaning characteristic is maintained for a long period of time and the service lives of an image carrier and devices are long. <P>SOLUTION: In the image forming apparatus of a tandem type, as to an image forming part in which the ratio of an amount of toner use to the number of paper sheets with original images converted to a specific image size is equal to or lower than a predetermined ratio, among image forming parts 10Y, 10M, 10C, and 10K, during respective separate color images are not formed, the supply of developer by development rolls 14Y, 14M, 14C, and 14K is stopped while the rotation of the photoreceptor rolls 11Y, 11M, 11C, and 11K is continued. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
