Patent ID: 7813683
Filing Date: 2010-10-12
Classification: G03G

Abstract:
1. A belt device, comprising: a belt member that faces a plurality of carrying bodies that respectively carry toner images or developers; a plurality of facing members that respectively faces the plurality of carrying bodies through the belt member; a detaching unit that brings at least one of the facing members to face a corresponding carrying body and removes other facing members away from other carrying bodies; and a contacting member that contacts the belt member to detach the belt member from the other carrying bodies when the detaching unit removes the other facing members away from the other carrying bodies, wherein the contacting member is a roller member that detachably moves with respect to an outer circumference of the belt member, the roller member being positioned at an upstream side of the facing member for black and the carrying body for black and a downstream side of the other facing members and the other carrying bodies in a traveling direction of the belt member, wherein when forming a black image, the detaching unit brings a facing member for black to face a carrying body for black and detaches the other facing members from the other carrying bodies, and when forming a color image, the detaching unit brings all the facing members to face respective carrying bodies.