Method of making tubular article

Details Method of making tubular article Method of making tubular article

1978-07-03

1979-03-20

Hoag, W.E.

Metal working

Method of mechanical manufacture

Assembling or joining

156156, 156165, 156191, 156194, 264257, 264263, 264267, 264269, 264314, B29D 300, B29D 2310, B29C 112

Patent

active

041446321

ABSTRACT:
A one-step method of both making and tortuously shaping three component tubular articles is disclosed, the tubular articles being of the hollow skin-core type of the desired complex configuration, strong and rigid, free from porosity, light in weight, resistant to high and low temperatures, comprised of a thin and relatively fragile elongated and longitudinally edge-lapped sheet tube integrally encased in a strongly reinforced plastic shell providing both tube-forming support and tube performance protection for fluid conveying and storage applications. The tube-forming sheet can be of specialized rubbers or plastics or metallic foils. It is advantageously susceptible to inspection to the required degree before incorporation into the article and may be capable of subsequent in place modification. It is gently formed under the controlled restraint of the combination of its surrounding rib-knit fabric tubes and flowing viscous resin in a tortuously shaped mold by an inflatable mandrel in a single step low pressure operation.

REFERENCES:
patent: 1504547 (1924-08-01), Egerton
patent: 2723426 (1955-11-01), Pelley
patent: 2995781 (1961-08-01), Sipler
patent: 3270111 (1966-08-01), Haldeman
patent: 3755037 (1973-08-01), Erwin et al.

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