Pipe coating method and apparatus

Details Pipe coating method and apparatus Pipe coating method and apparatus

1977-07-28

1978-12-19

Simmons, David A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156229, 15624415, 156429, 156446, 156495, 156498, B29C 1900

Patent

active

041304535

ABSTRACT:
Pipe is coated by extruding a band of heat-softened thermoplastic, cooling the band and passing it through tension-isolating snubber rolls then applying it to the surface of the rotating, advancing pipe under tension, and controlling the tension isolating snubber rolls and rate of movement of the pipe surface with respect to the rate of extrusion to provide substantially controlled tension on the band between the extruder and the tension isolating means and to provide a second, higher tension on the band between the tension isolating means and contact of the band with the pipe surface.

REFERENCES:
patent: 2700631 (1955-01-01), Ferguson
patent: 3400029 (1968-09-01), Mesrobian
patent: 3499072 (1970-03-01), Helling et al.
patent: 3616006 (1971-10-01), Landgraf
patent: 3682730 (1972-08-01), Haase
patent: 3762125 (1973-10-01), Prena
patent: 3802908 (1974-04-01), Emmons
patent: 3823045 (1974-07-01), Hielema
patent: 3959432 (1976-05-01), Wiley
patent: 3972761 (1976-08-01), Landgraf
patent: 4010054 (1977-03-01), Bradt

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