Process and device for piecing an open-end spinning device

摘要

To piece an open-end spinning device, the yarn end is introduced into the spinning rotor while the spinning rotor is stopped. An auxiliary suction air stream prevailing at the opener roller housing takes effect and sucks the yarn into the fiber feeding channel where it is held. The spinning rotor which was stopped until then is then again driven. Following this, the negative spinning pressure is switched on while the auxiliary suction air stream is simultaneously switched off. This causes the yarn end to be taken out of the fiber feeding channel and to be fed to the fiber collection surface of the spinning rotor where it is combined with the fibers which are again conveyed to the fiber collection surface. The yarn is then withdrawn in the form of a continuous yarn through the yarn draw-off pipe and out of the spinning rotor.