Patent ID: 7693454
Filing Date: 2010-04-06
Classification: G03G

Abstract:
1. An image forming apparatus comprising charging means, exposing means, developing means, no diselectrification, transfer means and cleaning means, which are provided along the direction of movement of an electrostatic image supporting material, wherein the electrostatic image supporting material is a multi-layered photoreceptor comprising a conductive substrate, and at least an undercoat layer, a charge generating layer and a charge transporting layer formed on the conductive substrate in this order, the undercoat layer is made of at least a titanium oxide and a binder resin, the undercoat layer has a thickness of 3 μm or less, fine titanium oxide particles are surface treated with alumina and silica, the number average primary particle size is 20 nm or less, and LED is used as an exposure light source in the exposing means.