| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that a cleaning blade is turned up because the photoreceptor of an image forming means not to be used is rotated in a state where toner is not supplied in the case of outputting an image only in black in a tandem color copying machine or printer. SOLUTION: The cleaning blade is prevented from being turned up by arranging a yellow image forming means on the most upstream side and a black image forming means on the most downstream side, developing and transferring yellow toner a little by the yellow image forming means and transferring the yellow toner to the photoreceptors of other color image forming means for cyan and magenta existing between the yellow image forming means and the black image forming means. |
