Construction of thermoplastic tubes with tubular ribs by helical

Details Construction of thermoplastic tubes with tubular ribs by helical Construction of thermoplastic tubes with tubular ribs by helical

1987-08-19

1989-05-02

Chiesa, Richard L.

Plastic article or earthenware shaping or treating: apparatus

Preform assembly means and means for bonding of plural...

Means forming indefinite length product

156173, 15624413, 26417714, 2642092, 425325, 425377, 425380, 425393, 425466, B29C 4706, B29C 5362

Patent

active

048264237

ABSTRACT:
An apparatus for the production of reinforced tubes by helical winding of thermoplastic strips and reinforcing members on a rotating mandrel, comprises a dual orifice extrusion die means capable of extruding a plastic strip in several different widths while simultaneously feeding a reinforcing member to the rotating mandrel.

REFERENCES:
patent: 3558411 (1971-01-01), Beelien
patent: 3765809 (1973-10-01), Farrell
patent: 3890181 (1975-06-01), Stent et al.
patent: 3910808 (1975-10-01), Steward
patent: 4436568 (1984-03-01), Rasmussen
patent: 4466854 (1984-08-01), Hawerkamp
patent: 4510004 (1985-04-01), Hawerkamp
patent: 4540537 (1985-09-01), Kamp
patent: 4613389 (1986-09-01), Tanaka
patent: 4643661 (1987-02-01), Chszaniecke
patent: 4659303 (1987-04-01), Straka et al.

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