Method and apparatus for alleviating tight spots in false twist textured yarn
AssigneeAkzona Incorporated
InventorErnest J. Griset, Jr.
Life of this patent
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Abstract
A method for alleviating tight spots in false twist textured yarn includes the steps of feeding a thermoplastic multi-filament yarn to a false twister, imparting a false twist to the yarn in one direction, setting the twist to provide a latent torque in the yarn, and thereafter passing the yarn around a tapered flange of a freely rotatable roller to impart a twist in the yarn of a direction opposite to that of the false twist imparted by the twister and of a magnitude sufficient to alleviate tight spots occurring in the yarn during passage through said false twister.
Claims11
A method for alleviating tight spots in false twist textured yarn which comprises, feeding a thermoplastic multi-filament yarn to a false twister, imparting a false twist to the yarn in one direction, setting the twist to provide a torque in the yarn, and then passing the yarn around a tapered flange of a freely rotatable roller to impart a twist in the yarn of a direction opposite to that of the false twist imparted by the twister and of a magnitude sufficient to alleviate tight spots occurring in the yarn during passage through said false twister without substantially reducing said torque.
An apparatus for alleviating tight spots in a false twist textured yarn which comprises a false twist assembly including means for feeding the yarn to a twist-setting zone, a false twister for imparting twist to said yarn which backs up opposite to the direction of travel of the yarn into said twist-setting zone, and means for withdrawing the yarn from said false twister;
- and a tapered flange roller means positioned to freely rotate between the false twister and the yarn withdrawing means for imparting a twist to the yarn which is opposite to the false twist initially imparted to the yarn and set in the twist-setting zone, said twist imparted by said tapered flange roller means being of sufficient magnitude to alleviate tight spots formed in the yarn during passage through said false twister.
Dependencies are inferred from the claim text.