Metal deforming – Process – Deforming sheet metal
Patent
1975-12-04
1977-05-10
Larson, Lowell A.
Metal deforming
Process
Deforming sheet metal
113118R, 165170, B21D 5304
Patent
active
040220508
ABSTRACT:
A method of making a heat exchanger sheet is disclosed including progressively forming an elongated flat sheet of metal into a continuously corrugated sheet having a plurality of deeply drawn convolutions which extend across the sheet, and compressing the periphery of the corrugated sheet to provide a substantially flattened edge portion while retaining a centrally disposed corrugated portion with minimal cold working thereof. Preferably, the sheet made thereby has convolutions with slightly sloping walls to better provide a geometrically uniform overlapped pattern in the flattened edge portion thereof.
REFERENCES:
patent: 2988033 (1961-06-01), Gapp
patent: 3119446 (1964-01-01), Weiss
Davis Billy J.
Dawson Harry J.
Mangus Ervin E.
Miller Kenneth J.
Caterpillar Tractor Co.
Lanchantin, Jr. Charles E.
Larson Lowell A.
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