Pneumatic yarn control arrangement for open-end friction spinning

摘要

The invention relates to an arrangement for open-end friction spinning having two adjacently arranged rollers driven in the same rotational direction and forming a wedge-shaped gap in which the yarn formation takes place. An air supply device is provided having at least one compressed air jet extending into the plane of the wedge-shaped gap and being directed upon the yarn for purposes of favorably influencing the contact force of the yarn against the rollers, and thereby the friction effect and/or the position of the yarn. In especially preferred embodiments, a plurality of compressed air jets are disposed to blow air against the yarn at positions downstream of the fiber feed in the yarn withdrawal direction. A suction device and a further compressed air jet are provided at the side of the wedge-shaped gap opposite the fiber feed opening in certain embodiments.