| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming device obtaining an excellent image with little transfer scattering at low cost by regulating the length, the moving speed, the dielectric constant and the volume resistivity of an intermediate transfer belt in a tandem intermediate transfer system. SOLUTION: The moving speed VL, the dielectric constantε, the volume resistivityρV and the distance L of the intermediate transfer belt 2 are set to satisfy an expression L/VL<ρV.ε.ε0. In this case, L0 is the distance on the belt 2 between a process to apply charge to the surface of the belt 2 and a process accompanied with the movement of toner, L1 is the shortest distance on the belt 2 between the contact opposed parts of an image carrier 1 and the belt 2, L2 is the moving distance on the belt 2 between of the most proximate image carrier 1 positioned on an upstream side in the moving and rotating direction of the belt 2 and the contact opposed part of the belt 2, L3 is the moving distance of the surface of the belt 2 between a transfer means and a cleaning part, and L4 is the moving distance of the surface of the belt 2 at the most proximate contact opposed part in the rotating downstream direction of the belt 2 than the cleaning part out of the contact opposed parts of the image carrier 1 and the belt 2.
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