Method and apparatus for making a film-coated synthetic resin tu

Details Method and apparatus for making a film-coated synthetic resin tu Method and apparatus for making a film-coated synthetic resin tu

1978-11-24

1981-04-14

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

15624414, 15624427, 156285, 156498, 156500, 264563, 264565, 264566, B29D 2304

Patent

active

042617774

ABSTRACT:
What is disclosed are methods and apparatus for coating a hollow synthetic resin tube with a pre-formed film coating by applying the film coating to an exterior surface of such a tube directly after extrusion, while the resin thereof is thermoplastic, and then passing them through a shaping channel while maintaining a modest pressure differential between the interior and exterior of the tube, whereby the film coating and tube are adhered by the compression thereof against the walls of the shaping channel.

REFERENCES:
patent: 2958364 (1960-11-01), Thompson
patent: 3336176 (1967-08-01), Medney
patent: 3668288 (1972-06-01), Takahashi
patent: 3843438 (1974-10-01), Gabriel
patent: 3887673 (1975-06-01), Sato et al.

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