ELECTRIC INDUCTION GAS-SEALED TUNNEL FURNACE
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United States of America Patent
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Issued Date -
Nov 20, 2014
app pub date -
Sep 15, 2012
filing date -
Sep 16, 2011
priority date (Note) -
Abandoned
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Abstract
A reinforced electric induction gas sealed tunnel furnace is provided. The assembled tunnel furnace has a tunnel wall that has the exterior wall transversely surrounded by structural reinforcing elements that give the tunnel structural strength to withstand a pressure differential between the interior and exterior of the tunnel, for example, when the tunnel interior environment is a vacuum and the tunnel exterior environment is at atmospheric pressure. One or more inductors form the induction coil system for the N tunnel furnace and can be located external to the tunnel wall, but within or adjacent to, the structural reinforcing elements. In alternative arrangements the structural reinforcing elements may be oriented with the length of the tunnel and installed either within or external to the tunnel. The tunnel and the structural reinforcing elements are sufficiently electromagnetically transparent to not interfere with inductive heating of a strip passing through the tunnel.
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