Abstract: In an open-end rotor spinning device the area of the rotor cover (3) across from the rotor edge (23) is made in the form of a rotor impact surface (4). Impact surface (4) has an axial (41) as well as a radial impact surface (42). The rotor impact surface (4) may be part of an insert (40) which is made in the form of a wearing part throughout its entire cross-section.

Abstract: A single-step stable method of producing spun-twisted yarns. A twist point is located on the frictional surface of a take-off funnel of the spinning rotor. A strand material which forms a component of the final spun-twisted yarn product is exposed, between feed rollers and said twist point, to an appropriate combination of transport effects of a pneumatic field of force and a mechanical field of force. For this purpose, the tube, through which the strand material is supplied, is determined in dependence on the pneumatic conditions prevailing in the spinning rotor.

Abstract: Cop tube holder for winding yarns or threads on textile machines, and more particularly on open-end spinning machines with an automatic cop exchange, provided with a pair of bent levers adapted to swing in the holder and carrying rotatable dishes for placing the front portions of the tube while the operating pressure necessary for clamping a tube between the dishes is exerted by a spring. The bent levers are motion-coupled to each other by means of a kinematic pair.