Patent ID: 6660979
Filing Date: 2003-12-09
Classification: G03G,H05B

Abstract:
A fixing device comprising an endless heating member which is adapted to be contacted with a fixable member to thereby enable an image on the fixable member to be thermally fixed; an electromagnetic inductive coil member disposed close to the endless heating member and inductively heating the endless heating member; and an inverter driving circuit supplying an AC current to the electromagnetic inductive coil member; wherein said coil member is constructed such that in a state where said coil member is positioned in the fixing device, an inductance L of said coil member and a load resistance R of said coil member meet a formula of: V2/[(2&pgr;fL)2+R2]âˆ’Â½>600 under conditions where a supply voltage of the inverter driving circuit is in the range of 100 to 250V, and a frequency thereof is in the range of 20 to 50 kHz.