| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a color image forming apparatus realizing a long service life for a photoreceptor drum and stably forming a high quality image. <P>SOLUTION: In the color image forming apparatus sequentially transferring each color toner image from the photoreceptor drum to transfer material while carrying the transfer material by a transfer belt, when there is no paper fed to the photoreceptor drum when the photoreceptor drum is driven, the Vb/Vd value: the ratio of the surface speed Vb of the transfer belt to the surface speed Vd of the photoreceptor drum is brought closer to 1 in comparison to the Vb/Vd value when the photoreceptor drum is driven and the paper is fed to the photoreceptor drum. For example, when transferring the toner image to paper, when the Vb/Vd value is (125mm/sec)/(130mm/sec), when the toner image transferring rate is kept high and a pattern to carry out image density compensation is formed on the transfer belt, by reducing Vd to 125mm/sec, the Vb/Vd value is made 1 and friction, etc., of the photoreceptor surface is suppressed. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
