| 摘要 |
An image forming apparatus of the present invention disclosed is of the type sequentially transferring toner images from a plurality of photoconductive drums (14B,14C) to a sheet (S) being conveyed by an image transfer belt (18) or an intermediate image transfer belt one above the other with bias applying members (21B,21C) to thereby form a composite color image. To discharge the image transfer belt (18) continuously at many needle-like portions and with small energy backup rollers (20B,20C), contacting the inside surface of the belt, each have volumetric resistivity of 10<9> OMEGA .cm or above and ten-point mean surface roughness Rz of 6 mu m or above or an arithmetic mean surface roughness Ra of 1,5 mu m or above. <IMAGE> |
