Patent ID: 6849838
Filing Date: 2005-02-01
Classification: G03G,H05B

Abstract:
1. A fuser comprising: a heating rotation member to be heated by induction current; a support frame disposed to face at least a part of the heating rotation member; an exciting coil which is wound on the support frame and from which magnetic fluxes is developed to generate the induction current; and a warpage prevention unit for preventing the warpage of the support frame caused by heat, wherein the warpage prevention unit comprises a first magnetic shield member disposed to face at least a part of the exciting coil and having a ring shape to prevent a leaking flux from the exciting coil, a second magnetic shield member having a ring shape to prevent a leaking flux from the exciting coil, wherein the support frame comprises a first face and a second face opposite the first face, wherein the exciting coil is wound on the first face, wherein the heat rotation member is provided to face the second face, and, wherein the first shield member is disposed over the first face, and the second shield member is disposed over the second face.