Patent ID: 6975829
Filing Date: 2005-12-13
Classification: G03G

Abstract:
1. A fixing device, for fixing an unfixed toner image formed on a sheet medium, comprising: a fuser roller having a built-in heat source therein; a pressure roller to be pressed against the fuser roller; a heat-resistant belt which is wound around the outer periphery of said pressure roller and is sandwiched between said pressure roller and said fuser roller so as to travel; and a slidable belt tensioning member for tensioning said heat-resistant belt, wherein said belt tensioning member is arranged on the upstream side in the traveling direction of said heat-resistant belt relative to the pressed portion between said fuser roller and said pressure roller and is disposed at such a position that said heat-resistant belt is wrapped around said fuser roller beyond the tangent to the pressed portion between said fuser roller and said pressure roller to form a nip.