Induction heating work coil

Details Induction heating work coil Induction heating work coil

2006-04-04

2006-04-04

Evans, Robin O. (Department: 3742)

Electric heating

Inductive heating

With heat exchange

C219S622000, C219S642000, C219S624000, C219S670000

Reexamination Certificate

active

07022951

ABSTRACT:
An induction heating device or work coil for heating electroconductive material to a desired temperature that can be used on a roll or cylinder of any diameter. The work coil has an open core of ferrite material shaped in a U. Wire is wound around the opposing legs of the U so that on excitation one leg becomes the N pole and the other leg becomes the S pole and the polarity alternates as the polarity of the excitation current alternates. A substantially thin rectangular flat layer of ferrite can be attached to ends of each pole piece. Each layer of ferrite has having a length sufficient to cover bottom end of each leg and a width in the direction of an axis perpendicular to the face of the U that corresponds to the width of the desired control heating effect.

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patent: 6232586 (2001-05-01), Eskildsen

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