Patent ID: 7446281
Filing Date: 2008-11-04
Classification: G03G

Abstract:
1. A heating device, comprising: a heating member for heating a medium to be heated, the heating member being arranged so as to be close to a transport path on which the medium is transported, the transport path extending inside the heating device being substantially perpendicular to a horizontal plane; and a first heat reflector for reflecting radiant heat from the heating member, the first heat reflector being positioned across the heating member from the transport path so as to face the heating member, wherein the first heat reflector is located at a predetermined position around the heating member so as to have a convective heat transfer coefficient η of 0.9 or smaller, the convective heat transfer coefficient η being given by the following equation: where Su is an area projected on an upper horizontal plane, of an outer surface of the first heat reflector, Sh is an area of the same projected on a vertical plane, and Sd is an area of the same projected on a lower horizontal plane, wherein the heating member includes a heating roller and a pressure roller, the heating roller and the pressure roller being arranged on respective sides of the transport path so as to be pressed against each other, and wherein the first heat reflector is positioned so as to cover at least a circumferential surface of the heating roller, the heating device, further comprising: a velocity adjusting section for adjusting a circumferential velocity V of the heating roller so that the circumferential velocity V falls within a range given by the following inequality: 0.32 (m/s)≦V≦0.49 (m/s).