HEATING ROLLER, FIXING DEVICE PROVIDED WITH THE HEATING ROLLER, IMAGE FORMING APPARATUS PROVIDED WITH THE FIXING DEVICE, AND MANUFACTURING METHOD OF CORE BAR

摘要

PROBLEM TO BE SOLVED: To provide a heating roller without the need of using a thick pipe stock even in the case that a thin heating roller of a small diameter is demanded and without the risk of breaking a core bar when in use. SOLUTION: The heating roller with a built-in heat source 55 in which an endless fixing belt 45 provided with a skew stop member on the inner periphery is disposed together with a fixing roller comprises: a metal cylindrical pipe 41b provided with a body part 41c and a shaft part 41d in which the diameter of both ends of the body part 41c is reduced; a ring-like member 411 provided coaxially with the metal cylindrical pipe 41b on the shaft part 41d of the metal cylindrical pipe 41b and engaged with the skew stop member 452; and a projection part provided on the shaft part 41d on the outer side of the ring-like member 411 by plastic deformation for positioning the ring-like member 411 toward the body part 41c. COPYRIGHT: (C)2006,JPO&NCIPI