A method of forming a registration pattern to enable detection of registration errors in an image forming device includes forming a first registration mark on a substrate at a first image forming station, and partially erasing the first registration mark formed on the substrate at a second image forming station to form the registration pattern. A method of automatically detecting the registration errors further comprises sensing the registration pattern, and detecting registration errors based on the registration pattern.

 
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> Electromagnetic induction heat generating roller, heating device, and image forming apparatus

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