Heating mechanism for use in image forming apparatus

摘要

Disclosed is a fixing apparatus in which a cylindrical roller having a thin metal layer is heated by an induction heating. In order to shorten the rising time required for elevating the temperature from the stopped state to a predetermined temperature in fixing a toner image transferred onto a paper sheet to the paper sheet, a coil covering member is arranged within the heating roller between an exciting coil and the inner wall of the heating roller, the coil covering member being colored in a color effective for reflecting the infrared ray radiated from the heating roller toward the heating roller. The coil covering member is formed of a material exhibiting electrical insulating properties and heat insulating properties and having a small heat capacity.