Textiles: spinning – twisting – and twining – Apparatus and processes – Open end spinning
Patent
1986-08-14
1987-10-13
Watkins, Donald
Textiles: spinning, twisting, and twining
Apparatus and processes
Open end spinning
D01H 112, D01H 1135
Patent
active
046989609
ABSTRACT:
A friction open-end spinning process wherein the fibers of the feeding fiber sliver, once separated into discrete fibers, are sucked by a suction slot on a revolving twister element provided with a perforated surface, to feed the free end of the yarn being formed. The process is characterized in that the fibers are fed in a direction parallel to the free end of the yarn being formed, are kept under an adjustable tension throughout the twisting operation, and are subjected to a progressively increasing twist from the open end of the yarn being formed onwards. The device embodying the above process uses a revolving flat disc provided with perforations arranged according to an annulus as the twister element. This element cooperates with a sucking slot, the edge of which, consituting the yarn formation line, is positioned according to a chord of the disc.
REFERENCES:
patent: 4130983 (1978-12-01), Dammann et al.
patent: 4202162 (1980-05-01), Vignon
patent: 4202163 (1980-05-01), Turk et al.
patent: 4497168 (1985-02-01), Kamp
Bottos Roberto
Ferro Francesco
Grego Francesco
Nerli Giovanni
Nesti Solitario
501 Officine Savio S.p.A.
Watkins Donald
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