String construction for athletic rackets

Textiles: spinning – twisting – and twining – Strand structure – Covered or wrapped

Patent

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Details

57 7, 57207, 428377, D02G 334, D02G 336, D02G 338

Patent

active

043064108

ABSTRACT:
A string construction for athletic rackets which can be frictionally engaged with a tennis ball or a badminton shuttlecock very well upon hitting it and which can be uniformly stretched on the athletic racket frame without being twisted, comprises a string-like core made of thermoplastic resin material and a tubular netlike structure made of thermoplastic resin material, the tubular netlike structure netting over and being secured to an outer circumference of the core, wherein the netlike structure includes a plurality of thread-like members forming a plurality of nodes at intersections thereof, all the thread-like members forming each node being integral with each other at each node, and projecting from the outer circumference of the core to a height substantially equal to each other at each node.

REFERENCES:
patent: 2217826 (1940-10-01), Van Laer
patent: 3207652 (1965-09-01), Shannon
patent: 3458987 (1969-08-01), Ozawa et al.
patent: 3644866 (1972-02-01), Deardurff
patent: 3745756 (1973-07-01), Crandall
patent: 4016714 (1977-04-01), Crandall

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