Sealing apparatus and method

Details Sealing apparatus and method Sealing apparatus and method

1978-05-15

1979-06-05

Lanham, C. W.

Metal fusion bonding

Process

Plural joints

228242, 431328, B23K 112, B23K 304

Patent

active

041571550

ABSTRACT:
A set of metal heat exchange tubes is simultaneously brazed into a metal tube sheet more rapidly and with greater uniformity by holding tube-and-sheet assembly under radiant heater with sheet essentially horizontal and carrying brazing metal, and forcing gases from above tubes down into tubes as assembly is heated. Heater can have heating surface enveloping the top and sides of the sheet, or can have flat heating surface, but is preferably a ceramic fiber gas burner. Burner can be divided into two portions using a single ceramic fiber mat and separate combustion mixture supplies, with non-combustible gas fed through one portion when other portion is the only one operating.

REFERENCES:
patent: 2298996 (1942-10-01), Woods
patent: 2389175 (1945-11-01), Woods
patent: 2577124 (1951-12-01), Newcomer
patent: 3456331 (1969-07-01), Holden

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