| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming apparatus in which the constitution of a color slippage correcting means is simplified as an image forming device used as output equipment such as a computer. SOLUTION: The directions of marks 25a, 25b and 25c provided at the rotation eccentric peak position of the photoreceptive drums 1a, 1b and 1c of yellow, cyan and magenta are make identical, and the marks are inserted into an apparatus body, and are connected to and driven by a rotationally motor 15e through a belt 21b. Also, a black photoreceptor 1d possesses an exclusive driving motor 15d, a belt 21a and a pulley 18d, and is driven independently of the photoreceptors of other three colors, and the rotational phases of independent driving motors 15e and 15d are changed, so that the phases of the photoreceptive drum 1a, 1b, 1c and 1d of respective colors are matched. |
