Method of continuously making flexible, heat insulated metal tub

Details Method of continuously making flexible, heat insulated metal tub Method of continuously making flexible, heat insulated metal tub

1978-09-08

1982-08-24

Husar, Francis S.

Metal working

Method of mechanical manufacture

Combined manufacture including applying or shaping of fluent...

264177R, 264176R, 264171, 264173, 295272, B22D 11126, B28B 2154

Patent

active

043453635

ABSTRACT:
Extruded, drawn and coiled copper tubing with wall thickness of 0.7 to 2 mm is soft annealed, straightened and jacketed in an extruder with a blend of polyvinyl chloride, chalk, a plasticizer and other additives for lubrication and stabilization. The jacket has inwardly extending ribs defining channels inbetween to enhance heat insulation.

REFERENCES:
patent: 2687997 (1954-08-01), Marchand
patent: 3550258 (1970-12-01), Ondiorne
patent: 3895085 (1975-07-01), Suzaki et al.

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