Patent ID: 8032047

Claim:
A fixing device for fixing a developer image to a recording medium, said fixing device comprising: a heat source; a heating member heated by said heat source so as to heat said recording medium; a pressing member disposed in contact with said heating member, said pressing member having no heat source; a first temperature detecting unit that detects a temperature of said heating member, and is remote from said heating member; a second temperature detecting unit disposed in contact with said pressing member, said second temperature detecting unit detecting a temperature transmitted from said heating member; a control unit that compensates a detected temperature detected by said first temperature detecting unit based on a detected temperature detected by said second temperature detecting unit, and controls said heat source based on a compensated detected temperature; and a cover provided so as to cover said heating member, said cover having an insertion opening through which said recording medium is fed into said cover and an ejection opening through which said recording medium is fed out of said cover, said cover further having a partition wall so that a substantially closed space is formed by said partition wall and a surface of said heating member, said partition wall being configured to isolate said substantially enclosed space from said insertion opening and said ejection opening, wherein said first temperature detecting unit is disposed in said substantially closed space.