Method and apparatus for extrusion of thermoplastic handrail
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United States of America Patent
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Jul 16, 2019
Grant Date -
Apr 26, 2018
app pub date -
Jun 17, 2016
filing date -
Jun 19, 2015
priority date (Note) -
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Abstract
A method of and apparatus for extruding an article of uniform cross-section, the article including a thermoplastic material and at least one cable for inhibiting stretch of the article. The cable is supplied to a respective tube and is conveyed between upstream and downstream ends. The thermoplastic material may be supplied to the downstream end of the tube. The thermoplastic material is brought together with the cable to embed the cable within the thermoplastic material, thereby forming a composite extrudate. The tube is configured to at least hinder movement of loose windings of the cable from the downstream end towards the upstream end, which may prevent or at least reduce incidence of “birdcaging”.
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