US 7,248,808 B2Granted

Heating apparatus, heating apparatus control method and noncontact thermal sensing device

AssigneesKabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha

InventorsToshihiro Sone, Osamu Takagi, Satoshi Kinouchi, Yoshinori Tsueda

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Abstract

A fixing apparatus according to one aspect of the present invention includes a non-contact temperature detecting element 81 allocated in non-contact with a heat roller, the sensing element detecting a temperature of the heat roller. The non-contact temperature sensing section 81 includes a thermopile P which detects a target temperature Pt of a heat roller 2, a temperature element CPU 100 which estimates an ambient temperature at the periphery of the thermopile P and computes an estimated ambient temperature SQt, and a thermister Q which detects an ambient temperature Qt at the periphery of the thermopile and outputs the ambient temperature Qt at an output voltage of a predetermined rate with respect to a total output voltage value corresponding to the estimated ambient temperature SQt.

Claims13

Dependent claims

A heating apparatus comprising:

a heat roller which supplies a heat to sheet;
a heating device including a heating member which heats the heat roller and a first control section which controls power supplied to the heating member in order to heat the heat roller to a target temperature;
and
at least one non-contact temperature sensing device provided in non-contact with a surface of the heating member, said at least one non-contact temperature sensing device comprising:
a target temperature sensing section which detects a target temperature of the heat roller;
a second control section which estimates an ambient temperature at the periphery of the target temperature sensing section and computes an estimated ambient temperature;
and
a self temperature detecting section which detects an ambient temperature at the periphery of the target temperature sensing section and outputs the ambient temperature at an output voltage of a predetermined rate with respect to a total output voltage value which corresponds to the estimated ambient temperature.

5 more elements

Dependencies are inferred from the claim text.