Patent ID: 11953849
Assignee: BROTHER KOGYO KABUSHIKI KAISHA
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An image forming apparatus comprising:
a main body casing;
a fixing unit configured to fix developer to a sheet by heating and pressurization, the fixing unit including: a heating unit configured to heat the sheet; and an end portion temperature sensor configured to detect a temperature of the heating unit;
a fan configured to discharge air inside the main body casing to outside of the main body casing; and
a controller,
wherein when the fixing unit is fixing the developer to the sheet, the controller is configured to:
determine a heating unit temperature based on the temperature detected by the end portion temperature sensor;
stop the fan in a case of determining that the heating unit temperature is not less than a threshold value; and
drive the fan in a case of determining that the heating unit temperature is less than the threshold value,

wherein the heating unit is elongated in a longitudinal direction,
the heating unit has a minimum-width-sheet passing area through which a minimum-width-sheet passes, the minimum-width-sheet having a minimum width to fix the developer by the fixing unit, and
in the longitudinal direction of the heating unit, the end portion temperature sensor is arranged outside of the minimum-width-sheet passing area.