Apparatus and method for producing kink resistant tubing

Details Apparatus and method for producing kink resistant tubing Apparatus and method for producing kink resistant tubing

1989-11-13

1991-10-22

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Of varying cross-sectional area or with intermittent...

264173, 2642092, 264312, 425132, 4251331, 425381, 4253823, B29C 4724

Patent

active

050593757

ABSTRACT:
Apparatus for producing flexible kink resistant tubing having one or more non-reinforced section(s) and one or more spirally-reinforced section(s). The apparatus includes a rotatable member having an extrusion passgeway for extruding a second thermoplastic material in a filament within a first thermoplastic material to form a reinforcing filament in tubing formed by the first thermoplastic material. The rotatable member is rotated at a predetermined velocity to form the reinforcing filament in a spiral or helical pattern in the wall of the tubing. A diverter valve is provided for selectively providing the second thermoplastic material so that filament reinforced and non-reinforced longitudinal sections of tubing may be formed without interruption. A method of producing such kink resistant tubing is also disclosed.

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