Patent ID: 6397021
Filing Date: 2002-05-28
Classification: G03G

Abstract:
A fixing unit for use in an image forming apparatus, comprising:a heat roller, heating a toner image on a print medium; a heater disposed in said heat roller and supplying heat to said heat roller; a first temperature detector disposed in contact with a first surface area of an end portion of said heat roller outside of a second surface area of said heat roller with which the print medium passes in contact, said first temperature detector generating a first temperature data; a second temperature detector disposed to oppose said heat roller, said second temperature detector being in proximity to a substantially middle portion of the second surface, said second temperature detector generating a second temperature data; and a controller, controlling supply of electric power to said heater, said controller switching based on the first temperature data and the second temperature data between a first temperature control mode where said controller controls supply of electric power to said heater such that the first temperature data is equal to a first target value, and a second temperature control mode where said controller controls supply of electric power to said heater such that the second temperature data is equal to a second target value.