Patent ID: 6269623
Filing Date: 2001-08-07
Classification: D01H

Abstract:
An open-end spinning arrangement having a rotatable spinning rotor, a fiber guide conduit with an exit mouth for delivery of spinning fibers into the spinning rotor, a yarn withdrawal nozzle for withdrawing a yarn formed of the fibers from a transition zone within the spinning rotor and simultaneously for rollingly and slidingly deflecting the yarn over a yarn contact surface of the yarn withdrawal nozzle to impart a false twist thereto, the yarn withdrawal nozzle having means for reducing the false twist within a zone extending over a circumferential portion of the yarn withdrawal nozzle, the false twist reducing means and the exit mouth of the fiber guide conduit being arranged relative to the direction of the rotor rotation such that actual twisting of the yarn is reduced thereat, the false twist reducing means comprising a depression in the yarn contact surface of the yarn withdrawal nozzle which is abruptly offset in the circumferential direction of the yarn withdrawal nozzle and which has a depth and an extent in the circumferential direction of the yarn withdrawal nozzle such that the yarn essentially loses contact with the yarn contact surface of the yarn withdrawal nozzle over a deflection distance in the direction of the yarn withdrawal and over an angular extent in the circumferential direction of the yarn withdrawal nozzle of at least about 10 degrees.