A SIMPLIFIED METHOD OF MAKING CORE YARNS

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Abstract
The making of core yarns in which the initial twists in the individual components, or plies, are all equal necessitates differential delivery rates for the core and outer plies. This paper describes a method of making a core yarn whereby all the plies are delivered at the same rate, and hence the doubling can be carried out on a normal doubling machine. The method depends on arranging the initial twists of the core and outer plies in such a way that the length changes which take place on doubling result in the same final length for the core and outer plies. Some experimental evidence is given to show the validity of the method.

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