Patent ID: 7769335
Filing Date: 2010-08-03
Classification: G03G

Abstract:
1. A fixing apparatus comprising: a roller member which includes a core member extending in an axial direction of the roller member, and having a center part in the axial direction and axial end parts located on both sides of the center part, the center part of the core member having a first outside diameter and an axial length, and the axial end parts of the core member having a second outside diameter larger than the first outside diameter and an air vent passing through the axial end part in the axial direction, a support member located outside the core member, and a metal member located outside the support member and formed as a hollow cylinder, the center part of the roller member having a first hardness, and both axial end parts of the roller member having a second hardness which is larger than the first hardness, the second hardness being larger than the first hardness by E