Patent ID: 6219518
Filing Date: 2001-04-17
Classification: G03G

Abstract:
In an image forming apparatus for sequentially transferring a plurality of toner images formed on an image carrier to an endIess intermediate image transfer body one upon the other for thereby effecting primary transfer, and collectively transferring said toner images from said intermediate image transfer body to a recording medium for thereby effecting secondary transfer, an image transfer roller for said secondary transfer includes a metallic core and at least two layers formed on said metallic core and including a base layer formed on said metallic core and a surface layer formed on said base layer, said at least two layers having a resistance between 1.57.times.10.sup.6 .OMEGA. and 1.57.times.10.sup.9 .OMEGA. for a unit length (1/cm), said surface layer having a volume resistivity between 1.times.10.sup.6 .OMEGA. cm and 1.times.10.sup.9 .OMEGA. cm.