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Patent Searching and Data


Title:
THERMAL FIXING DEVICE AND IMAGE FORMING APPARATUS
Document Type and Number:
Japanese Patent JP2002149002
Kind Code:
A
Abstract:

To provide a thermal fixing device capable of rapidly and accurately actuating a thermal cutoff means when a roller is excessively heated without making the device larger, and an image forming apparatus equipped with the thermal fixing device.

A thermistor 39, a thermal fuse 40 and a thermostat 41 are arranged in the center of a heating roller 26, that is, at positions leaving specified space in between and symmetrical from the center of the temperature distribution of a heater 33 in the longitudinal direction of the roller 26. Thus, the fuse 40 and the thermostat 41 sense substantially the same temperature as detection temperature detected by the thermistor 39, and they are rapidly and accurately actuated to prevent the excessive heating of the roller 26. By arranging the thermistor 39, the fuse 40 and the thermostat 41 by leaving the specified space in between in the longitudinal direction of the roller 26, the device is miniaturized.


Inventors:
TOMATSU YOSHIYA
Application Number:
JP2000345487A
Publication Date:
May 22, 2002
Filing Date:
November 13, 2000
Export Citation:
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Assignee:
BROTHER IND LTD
International Classes:
G03G15/20; H05B3/00; (IPC1-7): G03G15/20; H05B3/00
Attorney, Agent or Firm:
岡本 寛之 (外1名)