Patent ID: 7420141

Claim:
A temperature control apparatus for a thermal processing roller, comprising: heat transfer fluid supply unit for supplying heat transfer fluid to the thermal processing roller; a first temperature sensor for detecting a temperature of the heat transfer fluid supplied from the heat transfer fluid supply unit; first temperature control unit for comparing a temperature detected by the first temperature sensor with a first setting temperature to control a temperature of the heat transfer fluid to the first setting temperature; a second temperature sensor for detecting a surface temperature of the thermal processing roller; second temperature control unit for comparing a temperature detected by the second temperature sensor with a second setting temperature different from the first setting temperature to control a temperature of the heat transfer fluid to the second setting temperature; and switching unit for changing into the second temperature control unit when a difference between the temperature detected by the second temperature sensor and the second setting temperature is within a predetermined range, while changes into the first temperature control unit when the difference exceeds the predetermined range.