Induction heating of strip and other elongate metal workpieces
AssigneeThe Electricity Council
InventorsWilliam Barry Jackson, Roger Charles Gibson, Ralph Waggott
Life of this patent
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Abstract
Transverse flux heating of strip material is effected with a flux distribution having a low value near the margins of the strip and rising substantially uniformly inwardly from the margins to a central peak value for narrow strip or two peaks with a central lower flux region for wider strip. Constructions of pole pieces to achieve the required flux distribution are described.
Claims11
An induction heater for heating elongate strip material of a predetermined width, which strip is moved lengthwise through the heater at a uniform speed, which heater comprises at least one pole assembly extending transversely across the width of the strip, said pole assembly comprising at least one ferromagnetic pole carrier having a slot extending across the width of the strip and a plurality of pole pieces mounted in said slot for adjustment across the width of the strip but supported by said pole carrier against movement normal to the strip, said pole pieces being shaped and positioned to give a flux per unit width which varies across the width of the strip.
Dependencies are inferred from the claim text.