Heat exchanger strip and method and apparatus for forming same

Details Heat exchanger strip and method and apparatus for forming same Heat exchanger strip and method and apparatus for forming same

1975-06-16

1976-12-21

Larson, Lowell A.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

72187, 72196, 165152, F28D 102, B21D 1310

Patent

active

039986004

ABSTRACT:
A method and apparatus for rolling metal ribbon stock into convoluted fin strip for use in heat exchangers is disclosed. The passageways defined by adjacent convolutions may be of zig-zag shape in a direction transversely of the strip by reason of the fact that the form rolls are designed such that the return bent portions connecting successive convolutions are initially formed as two symmetrical half sections separated by a sharp bend line extending transversely along the centerline thereof. After the strip emerges from between the form rolls it is gathered or compressed lengthwise in a conventional manner so that further bending of the convolutions is localized along said sharp straight bend lines.

REFERENCES:
patent: 1233081 (1917-07-01), McFarland
patent: 1450351 (1932-04-01), Beran
patent: 1916120 (1933-06-01), Bixby
patent: 2329789 (1943-09-01), Schank et al.
patent: 2684707 (1954-07-01), Getz

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