| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent partial transfer failure (void) which occurs during transfer and image-reproducibility failure due to toner dust by keeping amounts of devel oper electrification high in order where developing toners in separate colors are developed onto an image carrier, and setting the absolute values of the amounts of developer electrification to specific ranges. SOLUTION: Developing units 14-17 scoop up developers together with developing sleeves 14-1-17-1 rotating in such a manner that the developers face the photoreceptor 9 in order to develop an electrostatic latent image, and each of them is composed of a developing paddle rotating for stirring, a developer- toner concentration detection sensor, etc. In the image forming method using the intermediate transfer system, the amounts of developer electrification are made high in order of developing at least the black, cyan, magenta, yellow toners onto the image carrier 9, and the absolute values of the amounts of electrification are set to 10-30μc/g. Thus, a satisfactory transfer characteristic can be obtained, and development having void and transfer dust can be prevented.</p> |
