Curved tubular articles and method

Details Curved tubular articles and method Curved tubular articles and method

1974-05-15

1978-08-29

Pavelko, Thomas P.

Plastic and nonmetallic article shaping or treating: processes

Disparate treatment of article subsequent to working,...

Effecting temperature change

264230, 264320, 264339, B29C 2500

Patent

active

041103963

ABSTRACT:
A method for the production of curved tubular elastomeric articles such as hose is described which uses a heat recoverable mandrel which when heated above its transition temperature range undergoes a transformation and reverts to a preselected curvilinear shape. A further temperature rise then vulcanizes the elastomeric article formed on the mandrel. The resultant curved tubular article has improved resistance to flex fatigue and obviates the problem of hot tear.

REFERENCES:
patent: 1880053 (1932-09-01), Schur
patent: 2964796 (1960-12-01), Press
patent: 3559766 (1971-02-01), Heslop
patent: 3837957 (1974-09-01), Mesnel

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