Heat roller

摘要

A suitable operation temperature can be reached in a short period of time in a heat roller comprising a cylindrical metallic substrate and a heating lamp axially arranged inside said metallic substrate, said heating lamp comprising a bulb filled with a thermally conductive gas and having a filament installed therein, by using a gas whose thermal conductivity is 110 x 10<-4> (W/m.K) or less at room temperature.