| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem in a color image forming apparatus that, in a method of forming and detecting a positional deviation detecting pattern in a transfer belt so as to perform rotation phase control, for preventing the color shift of an image, the phase of rotation irregularities can be made coincident with one another but correction when amplitude is different can not be performed, and a cost increases in a highly accurate rotation means using an involute spline joint. <P>SOLUTION: The change factor of rotational speed from a drive source to a photoreceptor being a body to be driven via a speed reduction mechanism and a joint is present in a speed reduction mechanism part and a joint part. Since the periods of respective changes are the same, the changes are offset to each other to be made small by shifting by an angle π so that the phases are opposite to each other and by connecting with combination. <P>COPYRIGHT: (C)2009,JPO&INPIT |
