| 摘要 |
<p>PURPOSE:To faithfully transfer a toner image onto an image carrier with high transfer efficiency by setting inherent volume resistivity within a specific range for a transfer material carrier electrostatically attracting and maintaining a transfer material and by increasing resistivity in its moving direction in comparison with its perpendicular direction. CONSTITUTION:A toner image T corresponding to image information is formed on the surface of a drum 11, the image carrier. In the transfer part A of the drum 11, the image T comes into contact with a belt 1, the transfer material carrier electrostatically attracting and maintaining the transfer material P; a conductive elastic blade 12 impresses an electric field from the opposite side to transfer the image T thereon. In this process, the inherent volume resistivity of the belt 1 is set at 10<8>-10<15>cm and is increased in its moving direction in comparison with its perpendicular direction. Thus, charge up is prevented together with the residual charge removing effect of rollers 14 and 16, and the locally concentrated electric field can be impressed in the transfer part 14, whereby, the image on the drum 11 can be preferably transferred with high transfer efficiency.</p> |
