Patent ID: 6690905
Filing Date: 2004-02-10
Classification: G03G

Abstract:
An image forming apparatus, comprising:at least one latent image carrier configured to carry an electrostatic latent image; at least one developing device configured to develop the electrostatic latent image with developer to form a toner image on the at least one latent image carrier; an intermediate transfer element including an elastic layer and configured to carry the toner image transferred from the at least one latent image carrier; a primary transfer device including the intermediate transfer element and configured to transfer the toner image on the at least one latent image carrier onto the intermediate transfer element; and a secondary transfer device configured to transfer the toner image carried by the intermediate transfer element onto a transfer material, wherein the developer includes toner and magnetic carrier, and a weight average particle diameter of the magnetic carrier is in a range of 10 &mgr;m to 80 &mgr;m, and wherein a volume resistivity of the magnetic carrier is in a range of 1Ã—108 &OHgr;Â·cm to 1Ã—1015 &OHgr;Â·cm when a direct current voltage of 250V is applied to the magnetic carrier.