Process for producing a reinforced tube

Details Process for producing a reinforced tube Process for producing a reinforced tube

1983-07-14

1985-01-22

Simmons, David

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156172, 156195, 15624413, 15624414, 15624415, 156287, 156428, 156430, B31C 300

Patent

active

044950187

ABSTRACT:
Process of making a reinforced tube including extruding a thin walled tube, encircling the tube with a completely closed layer of helically extending strip coated with heat activatable adhesive material. The tube is then passed through a sizing die heated at its entrance to activate the adhesive while subjecting the tube to relatively low internal pressure to bond the tube to the layer of strips. The integrally connected tube and strips are then passed through pinch rolls which close the tube and maintain the pressure upstream from the rolls different from the downstream pressure. Further reinforcing strips and an outer sheath are thereafter provided.

REFERENCES:
patent: Re27355 (1972-05-01), Skoggard
patent: 2723705 (1955-11-01), Collins
patent: 3336176 (1967-08-01), Medney
patent: 3437537 (1969-04-01), Takada
patent: 3503828 (1970-03-01), Walter
patent: 3769127 (1973-10-01), Goldsworthy

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