Method of making elastic yarn

Details Method of making elastic yarn Method of making elastic yarn

1978-04-14

1979-04-24

Watkins, Donald

Textiles: spinning, twisting, and twining

Apparatus and processes

Covering or wrapping

57 18, 57210, D02G 332, D02G 338

Patent

active

041505298

ABSTRACT:
A balanced elastic yarn includes an elastomeric core twisted in one direction and a single cover strand helically wrapped about the elastic core in a direction opposite to the twist direction of the elastic core. After a predetermined twist has been inserted in the elastic core, the core is tensioned with the elongation being positively controlled between spaced points intermediate the yarn take up and the elastic core supply and a high number of wraps per inch of the cover strand are helically wound about the elongated core while the core draft or stretch is positively controlled. The elastic core take-up package is subjected to heat to relieve the stresses in the cover strand resulting in a balanced elastic yarn in the relax state.

REFERENCES:
patent: 2061021 (1936-11-01), Chittenden et al.
patent: 2263614 (1941-11-01), Cote
patent: 2804745 (1957-09-01), Foster
patent: 3009311 (1961-11-01), Wang
patent: 3098347 (1963-07-01), Smith
patent: 3124924 (1964-03-01), Smith
patent: 3391532 (1968-07-01), Fitton
patent: 3668857 (1972-06-01), Goy et al.
patent: 3983687 (1976-10-01), Lewis

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