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US 6,640,064 B2Granted
Image heating apparatus and controller
AssigneeCanon Kabushiki Kaisha
InventorHidehiko Kinoshita
Life of this patent
Estimating the term…
Abstract
An image heating apparatus has a heat generating element for generating heat upon electric energization; a substrate supporting the heat generating element; a temperature detecting member for detecting a temperature of the substrate; an A/D converter for A/D conversion of an output of the temperature detecting member; a photo-coupler for converting an output of the A/D converter to a light signal and outputting the light signal; and an abnormality detecting unit for detecting an abnormal temperature on the basis of an output of the photo-coupler.
Claims8
An image heating apparatus, comprising:
- a heat generating member for generating heat upon electric energy supply thereto;
- a base plate for supporting said heat generating member;
- a temperature detecting element for detecting a temperature of said base plate;
- A/D conversion means for converting an output of the temperature detecting element to a digital signal;
- photo-coupling means for converting an output of said A/D conversion means to an optical signal;
- and
- abnormality discriminating means for discriminating abnormality of said apparatus on the basis of an output of said temperature detecting element through said photo-coupling means, wherein when said abnormality discriminating means discriminates an abnormality the electric energy supply to said heat generating member is stopped.
4 more elements
Dependencies are inferred from the claim text.