Fixing device and image forming apparatus

Details Fixing device and image forming apparatus Fixing device and image forming apparatus

2005-01-24

2009-06-30

Dole, Timothy J (Department: 2831)

Electrophotography

Control of electrophotography process

Control of fixing

C399S330000, C399S331000

Reexamination Certificate

active

07555233

ABSTRACT:
A fixing device includes a non-contacting thermistor (54) disposed in the vicinity of the surface of a heat roller (21) and an upper cover temperature thermistor (60) for detecting the temperature of a pressure roller (22). The calculated surface temperature (T) of the heat roller21is calculated based on the detected temperature (T1) detected by the non-contacting thermistor (54), the detected temperature (T2) detected by the upper cover temperature thermistor (60), the distance (L1) from the non-contacting thermistor (54) to the surface of the heat roller (21) and the distance (L2) from the non-contacting thermistor (54) to the upper cover (51).

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patent: 2004/0005163 (2004-01-01), Miura
patent: 2001-242741 (2001-09-01), None

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