Apparatus for magnetic induction edge heaters with frequency mod

Details Apparatus for magnetic induction edge heaters with frequency mod Apparatus for magnetic induction edge heaters with frequency mod

1990-04-26

1992-10-20

Chiesa, Richard L.

Coating apparatus

With means to apply electrical and/or radiant energy to work...

118 58, 118429, 219 1047, 219 1061R, 427543, B05C 1102

Patent

active

051566834

ABSTRACT:
An apparatus for galvannealing steel strip includes an applying device for applying a coating of controlled thickness of a strip. A controller controls the thickness of the applied coating. A heating furnace heats the steel strip to produce a galvannealed product. Edge heaters for heating the edges of the steel strip by magnetic induction promote uniform temperature distribution across the steel strip. The uniform temperature distribution produces more uniform galvannealing in the product. The edge heaters have preselected operating frequencies. A modulating circuit imposes a frequency modulation on the operating frequencies of the edge heaters to avoid undesirable transverse flexural resonance in the galvannealed product.

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