| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce the variation of the rotational speed of a photoreceptive drum without increasing the number of parts to the utmost. <P>SOLUTION: In the tandem type image forming apparatus 101, if a drum driving device 300 always rotating the respective photoreceptive drums 201 simultaneously is assembled to make the fluctuation period of the rotational speed of the respective photoreceptive drums 201BK to 201C synchronize with each other in assembly, the photoreceptive drums 201 are respectively rotated to make the fluctuation period of the rotational speed of the photoreceptive drums 201 synchronize with each other even after assembly. Therefore, the photoreceptive drum is assembled by obtaining the phase difference of the fluctuation period of the rotational speed of the photoreceptive drums 201 and being shifted by the amount of the phase difference. <P>COPYRIGHT: (C)2008,JPO&INPIT |
