Composite cord manufacturing method
AssigneeCousin Freres S.A.
InventorsJean-Claude Cousin, Jacques A. Robin
Life of this patent
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Abstract
In a method of manufacturing a composite cord, in particular for use in stringing tennis rackets, continuous fibers are twisted together while a liquid binder is applied between them. This occurs just before the fibers are twisted through a die which wipes the binder and forms a protective sheath. Cords are manufactured at reduced cost through the elimination of heating of the entire cord.
Claims4
A method of manufacturing a composite cord, particularly for tennis rackets, from two different components constituted solely of thermoplastic material, each of the components having a ratio in weight comprised between 45 and 55% of the total weight, the first component being constituted of textile multifilament synthetic yarns and the second component being a thermoplastic binder the softening point of which is lower than the softening point of the first component comprising:
- passing the first component through a die
- heating the second component to a semiliquid state and then introducing it under pressure into the yarns in the die to impregnate the yarns before they are twisted together,
- twisting the yarns under tension by a rotational movement of a take-up spool to flow the second component into surrounding relationship with said yarns,
- compressing the assembly of the first and second components in the die, and then
- cooling the composite cord to return it to ambient temperature and roll it on a
Dependencies are inferred from the claim text.