Patent ID: 8005413

Claim:
A pressure roller forming a nip portion for contacting to a heating member to pinch and convey and heat recording material, comprising: a core metal; an elastic layer containing a thermal conductive filler whose length is not less than 0.05 mm and not more than 1 mm, wherein a thermal conductivity (λ f ) of the thermal conductive filler in the longitudinal direction of the thermal conductive filler is equal to or more than 500 W/(m·k), wherein a dispersed amount of the thermal conductive filler dispersed in said elastic layer is not less than 5 vol % and not more than 40 vol %, wherein the thermal conductivity (λy) of said elastic layer in a longitudinal direction perpendicular to a recording material conveyance direction is equal to or more than 2.5 W/(m·k) and an ASKER-C hardness of said elastic layer is not more than 60 degrees; and, a solid rubber elastic layer provided between said core metal and said elastic layer containing the thermal conductive filler, wherein a thermal conductivity (λ) of said solid rubber elastic layer in a thickness direction of said solid rubber elastic layer is not less than 0.16 W/(m·k) and not more than 0.40 W/(m·k).