A thread draw-off nozzle (1) for an open-end spinning device (2) features a nozzle insert (3) for deflecting a produced yarn (5) and a nozzle frame (4), by means of which the thread draw-off nozzle (1) can be fixed in the open-end spinning device (2). The nozzle frame (4) features a cylindrical shank (6). The shank (6) of the nozzle frame (4) is provided with a centering diameter (ZD) and the cylindrical shank (6) of the nozzle frame (4) is shorter than half the centering diameter (ZD).

A thread draw-off nozzle (1) for an open-end spinning device (2) features a nozzle insert (3) for deflecting a produced yarn (5) and a nozzle frame (4), by means of which the thread draw-off nozzle (1) can be fixed in the open-end spinning device (2). The nozzle frame (4) features a cylindrical shank (6). The shank (6) of the nozzle frame (4) is provided with a centering diameter (ZD) and the cylindrical shank (6) of the nozzle frame (4) is shorter than half the centering diameter (ZD).

Methods, system, and apparatus for producing an actuator device are disclosed. The method may include twisting a muscle fiber; coiling the twisted muscle fiber about a mandrel; securing the muscle fiber onto the mandrel using a securing means; heating the muscle fiber to a predetermined temperature using a heating means; and removing the coiled muscle fiber from the mandrel. The twisting, coiling, securing, heating, and removing is a process that is continued until the muscle fiber is a desired length.

Methods, system, and apparatus for producing an actuator device are disclosed. The method may include twisting a muscle fiber; coiling the twisted muscle fiber about a mandrel; securing the muscle fiber onto the mandrel using a securing means; heating the muscle fiber to a predetermined temperature using a heating means; and removing the coiled muscle fiber from the mandrel. The twisting, coiling, securing, heating, and removing is a process that is continued until the muscle fiber is a desired length.

A thread draw-off nozzle for an open-end rotor spinning device includes an entrance-side nozzle funnel and an exit-side nozzle bore adjoining the nozzle funnel. A plurality of notches are arranged in the nozzle funnel and extend essentially radial to the nozzle bore. Each notch has an inlet wall, a baffle wall, a radially outer notch inlet, and a radially inner notch outlet. Each notch further includes an essentially flat notch bottom arranged between the inlet wall and the baffle wall.

A thread draw-off nozzle for an open-end rotor spinning device includes an entrance-side nozzle funnel and an exit-side nozzle bore adjoining the nozzle funnel. A plurality of notches are arranged in the nozzle funnel and extend essentially radial to the nozzle bore. Each notch has an inlet wall, a baffle wall, a radially outer notch inlet, and a radially inner notch outlet. Each notch further includes an essentially flat notch bottom arranged between the inlet wall and the baffle wall.

A thread guide unit is used for drawing off a thread out of a rotor of a spinning unit of an open-end spinning machine. The thread guide unit includes a draw-off tube, and a compressed air nozzle configured with the draw-off tube. A thread outlet element extends into the draw-off tube. The compressed air nozzle includes a mouth formed as a gap between an inner diameter surface of the draw-off tube and the thread outlet element. A method for operating a spinning unit of an open-end spinning machine having the thread guide unit is also provided.

A thread guide unit is used for drawing off a thread out of a rotor of a spinning unit of an open-end spinning machine. The thread guide unit includes a draw-off tube, and a compressed air nozzle configured with the draw-off tube. A thread outlet element extends into the draw-off tube. The compressed air nozzle includes a mouth formed as a gap between an inner diameter surface of the draw-off tube and the thread outlet element. A method for operating a spinning unit of an open-end spinning machine having the thread guide unit is also provided.

A thread draw-off nozzle for an open-end rotor spinning device includes a front surface, a nozzle bore, and a funnel-shaped yarn deflection surface connecting the front surface and the nozzle bore. The front surface adjoins the yarn deflection surface. The front surface and the yarn deflection surface form an effective diameter (D.sub.W) of the thread draw-off nozzle. The effective diameter (D.sub.W) of the thread draw-off nozzle is less than 8 mm, and the yarn deflection surface comprises a radius of curvature (R) of less than 2.5 mm.

A thread draw-off nozzle for an open-end rotor spinning device includes a front surface, a nozzle bore, and a funnel-shaped yarn deflection surface connecting the front surface and the nozzle bore. The front surface adjoins the yarn deflection surface. The front surface and the yarn deflection surface form an effective diameter (D.sub.W) of the thread draw-off nozzle. The effective diameter (D.sub.W) of the thread draw-off nozzle is less than 8 mm, and the yarn deflection surface comprises a radius of curvature (R) of less than 2.5 mm.