Laminated paddle heater and brazing process

Details Laminated paddle heater and brazing process Laminated paddle heater and brazing process

1999-01-29

2000-11-14

Walberg, Teresa

Electric heating

Heating devices

With heating unit structure

2194441, 118725, H05B 344

Patent

active

061473340

ABSTRACT:
A laminated heater paddle is provided, in which a heater element having a symmetrical pattern is brazed within a heater channel defined between a first layer and a second layer. The laminated heater paddle provides brazed junctions between dissimilar metals. The heater element, having a stainless steel outer surface, is plated with nickel, and is then squeezed between the aluminum lower and upper layers. Aluminum shim stock is used between the first layer of aluminum and the second layer of aluminum or nickel plated stainless steel, wherein the aluminum shim stock provides a brazing medium. The assembly is then subjected to a vacuum, before being heated near the melting point of the aluminum. Alternative heater embodiments include guide tubes or cooling tubes between two or more brazed layers. The brazing process can alternatively be used for other applications.

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patent: 5595241 (1997-01-01), Jelinek
patent: 5635093 (1997-06-01), Arena et al.
patent: 5665166 (1997-09-01), Deguchi et al.
patent: 5904872 (1999-05-01), Arami et al.

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