Patent ID: 8955842
Filing Date: 2015-02-17
Classification: G03G

Abstract:
1. A belt unit comprising: a rotatable endless belt for receiving a toner image thereon or for conveying a transfer material; a first reinforcing member, provided on an outer peripheral surface of said endless belt at one end portion with respect to a belt widthwise direction perpendicular to a movement direction of said endless belt, for reinforcing said endless belt; a second reinforcing member, provided on the outer peripheral surface of said endless belt at the other end portion with respect to the belt widthwise direction perpendicular to the movement direction of said endless belt, for reinforcing said endless belt; and a driving roller for rotationally driving said endless belt while supporting the inner peripheral surface of said endless belt, wherein in the belt widthwise direction, a first length from an inner edge surface of said first reinforcing member to an inner edge surface of said second reinforcing member is smaller than a width of a region in which said driving roller contacts said endless belt, and a second length from an outer edge surface of said first reinforcing member to an outer edge surface of said second reinforcing member is larger than the width of the region in which said driving roller contacts said endless belt, and wherein said endless belt is free of a projected portion projecting from the inner peripheral surface over the belt widthwise direction.