| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image forming device capable of suppressing deterioration of toner and abrasion of a developing roller. <P>SOLUTION: An image forming device comprises a first photoreceptor 51K corresponding to a developer of a specific color, a plurality of second photoreceptors 51Y, 51M and 51C corresponding to a developer of other than the specific color, a first developing roller 53K for supplying a developer to the first photoreceptor 51K by rotating while contacting with the first photoreceptor 51K and a plurality of second developing rollers 53Y, 53M and 53C for supplying a developer to each of the second photoreceptors 51Y, 51M and 51C by rotating while contacting with the corresponding second photoreceptors 51Y, 51M and 51C. During continuous printing is performed in a monochrome mode in which an image is formed on a sheet S using the first photoreceptor 51K, the second developing rollers 53Y, 53M and 53C are switched to a first state of contacting with the corresponding second photoreceptors 51Y, 51M and 51C to stop and a second state of contacting with the corresponding second photoreceptors 51Y, 51M and 51C to rotate. <P>COPYRIGHT: (C)2012,JPO&INPIT |
