Patent ID: 6239411
Filing Date: 2001-05-29
Classification: G03G,H05B

Abstract:
A fixing device for heating and fixing an unfixed image to a record member bearing said unfixed image, comprising:a heating roller having a core roller and a layer of a resistance heating material formed on an outer peripheral surface of said core roller and operable to generate heat when an electric curt flows therethrough;a pair of carriers rotatably carrying end portions of said heating roller;a pair of ring-shaped current receiver members each located between said carrier and a center of said heating roller, being adapted to rotate together with said heating roller and electrically connected to said resistance heating material layer;a pair of current supply members being in contact with and electrically connected to said current receiver members, respectively; andinsulating members made of an electrical insulation material, each being in contact with an outer end of said current receiver member and extending toward said carrier neighboring to said corresponding current receiver member, whereina distance L3 from the inner end of said carrier to the outer end of said current receiver member neighboring to said carrier is 1 mm or more, a sum (L1+L2) of a width L1 of said insulating member and a height L2 of said insulating member from the outer surface of said core roller is 2.5 mm or more, and said distance L3 and said width L1 satisfy a relationship of L3.gtoreq.L1.