Patent ID: 7580662
Filing Date: 2009-08-25
Classification: G03G

Abstract:
1. An image forming apparatus comprising: an exposure unit; a developing unit; an intermediate transfer belt having a coated layer as a surface layer that carries an developer image on the surface layer for transferring an image onto a recording material; a light-emitting member that emits light rays having a predetermined wavelength toward the surface layer of the intermediate transfer belt; and a sensing member that senses the light rays reflected from the intermediate transfer belt, wherein the intermediate transfer belt includes: a metal layer whose light reflection coefficient is larger than that of the coated layer; an intermediate layer positioned between the coated layer and the metal layer for restraining the different light rays having a wavelength other than the predetermined wavelength from reflecting from the intermediate transfer belt; and a base layer on a side opposite from the intermediate layer when viewed from the metal layer, and wherein the intermediate layer includes a plurality of layers for restraining the different light rays of a plurality of types having different wavelengths from each other from reflecting from the intermediate transfer belt.