Abstract: An open-end spinning arrangement having a yarn withdrawal nozzle (10), by means of which the yarn is withdrawn form its transition zone within the spinning rotor and is rollingly and slidingly deflected while circulating in contact with the yarn withdrawal nozzle, additionally imparting a false twist. The yarn withdrawal nozzle has a depression (24), which is abruptly offset in the circulating direction of the yarn, by which the yarn loses contact with the yarn withdrawal nozzle (10) in the withdrawal direction of the yarn and over an angular area a of at least 10 degrees. Each time the rotating yarn tail sweeps over this depression, the false twist is completely interrupted and the actual twisting of the yarn at the yarn withdrawal nozzle (10) is cancelled.

Abstract: An open-end rotor spinning machine includes open-end spinning apparatuses each having a rotor housing, a spinning rotor revolving at high rpm in the rotor housing, and a yarn draw-off device extending into the spinning rotor. A cooling device includes a channel plate closing the rotor housing in an operating state. The channel plate has double walls defining a cooling chamber therebetween surrounding the yarn draw-off device. Connection sleeves connect the cooling chamber to a coolant loop.