Textiles: spinning – twisting – and twining – Apparatus and processes – Twist setting
Patent
1983-07-07
1986-01-07
Watkins, Donald
Textiles: spinning, twisting, and twining
Apparatus and processes
Twist setting
57310, 57331, D02G 108, D02G 102, D01H 792
Patent
active
045626944
ABSTRACT:
The present invention relates to the manufacture of textile multifilament yarns and, in particular, to a device for twisting multifilament yarns in conventional drawtwister machines. The device includes a pair of twisting rollers mounted to rotate freely on shafts, the axis of which are arranged with a substantial angle between them and in spaced apart and parallel planes. One twisting roll is a straight cylinder mounted on a fixed shaft whose axis is perpendicular to a supporting plate. The other is a frustrum with concave walls and a determined radius of curvature and is mounted on a shaft whose axis is parallel to the surface of the supporting plate.
The supporting plate of the twisting device is installed on a surface of the drawtwister machine so that the shaft of the concave roll forms an angle of about 40.degree.-50.degree. relative to an imaginary line connecting the yarn fastening roller and the surface of the godet. Twist in the yarn is set by heating the filament by of a suitable heating element before the yarn passes around the twisting rollers.
REFERENCES:
patent: Re28117 (1974-08-01), Rice
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patent: 2988866 (1961-06-01), Kleekamm
patent: 3247662 (1966-04-01), Jaeggli
patent: 3680302 (1972-08-01), Hess et al.
patent: 3735575 (1973-05-01), Hattori
patent: 3782090 (1974-01-01), Edwin et al.
patent: 3816989 (1974-06-01), Rice
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