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US 7,623,818 B2Granted
Belt fixing device and image forming apparatus therewith
AssigneeFuji Xerox Co., Ltd.
InventorsHideaki Ohhara, Yasutaka Naito, Kazuyoshi Itoh
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Abstract
A belt fixing device includes an endless belt member, an excitation coil and a deterioration detection unit. The endless belt member includes a metal layer. The excitation coil heats the metal layer by electromagnetic induction. The deterioration detection unit detects deterioration of the metal layer of the belt member through the excitation coil.
Claims7
A belt fixing device comprising:
- an endless belt member that includes a metal layer;
- an excitation coil that heats the metal layer by electromagnetic induction;
- a detection piece disposed in an area of the belt member where a bending strain of the detection piece is larger than that of the metal layer;
- and
- a deterioration detection unit configured to detect, through the excitation coil, change in a characteristic value of the detection piece, which has a correlation with deterioration of the metal layer.
2 more elements
Dependencies are inferred from the claim text.