Abstract: A method is provided for operating a textile machine, with a multiple number of adjacent work stations having a respective spinning unit with a spinning device and/or one winding device and handling elements for piecing a thread or for connecting two thread ends. If production is interrupted, a thread end on the bobbin side is provided to a defined receiving position at the work station. For piecing the thread or for connecting the thread ends, the thread end on the bobbin is cut to length by the work station work elements, received from the receiving position, prepared for piecing or for connecting and pieced up or connected. A thread end wound on the bobbin is sought out by means of a thread seeking device deliverable to multiple work stations of the textile machine, and the thread end is subsequently moved into the receiving position at the work station, from which it is received by the work station work element of the work station, in particular by a handling element of its own work station.

Abstract: A false twist device for an open-end spinning device to introduce a false twist in a yarn has a largely tubular carcass and several false twist edges arranged behind one another in the yarn draw-off direction and inclined by an angle in the carcass with regard to the yarn draw-off direction. The false twist edges protrude in such a way into the interior of the tubular carcass that the yarn experiences a deflection on each one of the false twist edges. The several false twist edges are arranged offset in such a way in the carcass in circumferential direction that the yarn simultaneously experiences a spatial deflection compared to its regular yarn draw-off direction through the successive deflections on the several false twist edges.

Abstract: With a method for operating a spinning machine (1), with a multiple number of work stations (2) arranged next to each other, each work station (2), as a work element (3, 28, 4, 10, 16, 17, 18), features at least one spinning unit (3) with a spinning device (28), one winding device (4) and handling elements (10, 16, 17, 18) of their own work station for spinning back in the thread (F). If the spinning process is interrupted, a thread end (6) on the coil side is provided in a defined receiving position (A) at the work station (2). For spinning back in a thread (F), the thread end (6) on the coil side is cut to length by work elements (3, 28, 4, 10, 16, 17, 18) of the work station (2), in particular the handling elements (10, 16, 17, 18) of their own work station, received from the receiving position (A), prepared for spinning back in and spun in.

Abstract: A spinning point of a spinning machine includes a spinning unit, a drawing-off device for the yarn downstream of the spinning unit and a yarn storage downstream of the drawing-off device for the intermediate storage of a section of yarn. The yarn storage has a sensor system for monitoring the filling level of the yarn storage (7). The spinning point includes a winding device for the yarn downstream of the yarn storage, along with a return unit, with the assistance of which an end of the yarn found within the yarn storage after a yarn break is returned into the area of the spinning point. The winding device (9) is stopped in the case of a yarn break in such a manner that, after the stop, an end section of the yarn remains within the yarn storage (7).

Abstract: The invention relates to a yarn draw-off unit of a rotor spinning machine, having a draw-off nozzle (21) which projects into a spinning chamber (22) of the rotor spinning machine, and a draw-off conduit (23) for a yarn (5) produced within the spinning chamber (22), the draw-off conduit (23) being arranged downstream of the draw-off nozzle (21) in the draw-off direction of the yarn (5) that is drawn off from the spinning chamber (22). The draw-off conduit (23) comprises a helical section (24), with the aid of which a false twist can be imparted to the yarn (5) within the draw-off conduit (23). Furthermore, a draw-off nozzle for a rotor spinning machine is described, the draw-off conduit (23) of which comprises a helical section (24), with the aid of which a false twist can be imparted to the yarn (5) within the draw-off nozzle (21). Finally, the invention relates to a method for producing a yarn (5) with the aid of a rotor spinning machine.

Abstract: A false twist device (17) for an open-end spinning device (1) to introduce a false twist in a yarn (7) has a largely tubular carcass (20) and several false twist edges (19) arranged behind one another in yarn draw-off direction (G) and inclined by an angle (?) in the carcass (20) with regard to the yarn draw-off direction (G). The several false twist edges (19) protrude in such a way into the interior of the tubular carcass (20) that the yarn (7) experiences a deflection in each one of the false twist edges (19). Additionally, the several false twist edges (19) are arranged offset in such a way in the carcass (20) in circumferential direction that the yarn (7) simultaneously experiences a spatial deflection compared to its regular yarn draw-off direction (G) through the successive deflections on the several false twist edges (19).

Abstract: The invention relates to a slubbing machine for producing a rove (1) from a fiber web (2), wherein the slubbing machine has at least one spinning nozzle (3) with an inlet opening (4) for the fiber web (2), wherein the spinning nozzle (3) is assigned at least one air nozzle through which the air can be channeled into the spinning nozzle (3) in order to impart a protective rotation to the fiber web (2) within the spinning nozzle (3), wherein the spinning nozzle (3) has an outlet (5) through which the rove (1) can be drawn out of the spinning nozzle (3), and wherein the slubbing machine comprises at least one receiving device (28) arranged downstream of the spinning nozzle (3) in the transport direction of the rove (1), particularly in the form of a winding device (6) to receive the rove (1) leaving the spinning nozzle (3).

Abstract: The invention relates to a method of operation for an air jet spinning machine, which is characterized in that the spinning process is interrupted when a yarn fault is detected, and subsequent to the interruption of the spinning process, a piecing process is initiated which is at least partly carried out by the spinning station and in which a number of yarn process and handling devices directly assigned to the spinning station are applied. Furthermore, an air jet spinning machine is proposed which permits such a piecing method.

Abstract: The invention relates to a spinning point (1) of a spinning machine, whereas the spinning point (1) includes a spinning unit (5), a drawing-off device (6) for the yarn (2) downstream of the spinning unit (5) in the direction of transport (T) and a yarn accumulator (7) downstream of the drawing-off device (6) for the intermediate accumulation of a section of yarn, whereas the yarn accumulator (7) is allocated a sensor system (8) for monitoring the filling level of the yarn accumulator (7), whereas the spinning point includes a spooling device (9) for the yarn (2) downstream of the yarn accumulator (7), along with a return unit (10), with the assistance of which an end of the yarn (11), which is found within the yarn accumulator (7) after a yarn break, is able to be returned in the area of the spinning point (1).

Abstract: The invention relates to a method of operation for an air jet spinning machine, which is characterized in that the spinning process is interrupted when a yarn fault (18) is detected, and subsequent to the interruption of the spinning process a piecing process is initiated which is at least partly carried out by the spinning station (2) and in which a number of yarn process and handling devices directly assigned to the spinning station (2) are applied. Furthermore, an air jet spinning machine is proposed which permits such a piecing method.

Abstract: An overend take-off crosswound bobbin and a method for its production are designed in such a way that the density of the finished crosswound bobbin is increased and the run-off characteristics during further processing are optimized. For this purpose, in one variant parallel windings are introduced at intervals. In another variant, when the bobbin diameter is small the yarn is wound on at a smaller pitch angle than for a larger diameter. Furthermore, a traversing stroke which is reduced by comparison with the bobbin width is displaced along the bobbin width.

Abstract: A process and an arrangement for re-starting a previously interrupted spinning process in a spinning arrangement is provided. The arrangement includes a drafting unit which can be shut down and also an airjet unit including a vacuum chamber. For the purpose of removing an initially inhomogeneous fiber stream, a staple fiber strand, delivered by the re-operating drafting unit, is temporarily suctioned as waste via a deflecting device after it has left the drafting unit. Only then, when a homogeneous fiber stream has formed, is the staple fiber strand joined with a thread which is transported through the airjet unit. The inhomogeneous fiber stream is removed with the aid of the low pressure in the vacuum chamber.

Abstract: A process for preparing a piecing operation in an air jet spinning arrangement is described. The air jet spinning arrangement comprises a drafting device, whose main drafting zone is bordered on its entry side by an apron roller pair and on its exit side by a delivery roller pair. The apron roller pair is connected to a first drive, the delivery roller pair to a second drive. When the spinning process is interrupted, the delivery of a closed staple fiber strand is stopped in the main drafting zone and a new starting end of the staple fiber strand is created. This new starting end is to be pieced together with an end of a thread already spun. To create a new starting end of the staple fiber strand suitable for piecing, the apron roller pair and the delivery roller pair are each controlled separately when the spinning process is interrupted and are shut down one after the other, in such a way that in the main drafting zone a new starting end of the staple fiber strand is formed.

Abstract: An air jet aggregate for an air jet spinning apparatus for producing a spun thread from a staple fiber strand includes a vortex chamber and a number of fluid-feeding injector channels running into the vortex chamber. At least two injector channels are provided, which have differing angles of inclination in relation to a parallel to the axis of the spun thread. The at least two injector channels having differing angles of inclination are connectable to at least one pressurized air source. The injector channels with differing angles of inclination are, preferably, connectable to separately adjustable pressurized air sources.

Abstract: An airjet spinning arrangement includes a fiber feed channel, which runs into a vortex chamber, and a fiber withdrawal channel, which exits out of the vortex chamber. The fiber withdrawal channel is arranged in a spindle-shaped component, which can be moved away from the fiber feed channel by a moving device. In order to clean the area of the entry opening of the thread withdrawal channel, a cleaning channel is provided, which is directed against the spindle-shaped component and is connected to a pressurized air source. The cleaning channel runs into a ring channel, which surrounds the spindle-shaped component. A first exit opening of this ring channel is designed so that it forms a ring opening surrounding the spindle-shaped component and is directed against the spindle shaped component when the spindle-shaped component is moved away from the fiber feed channel.

Abstract: An overend take-off crosswound bobbin and a method for its production are designed in such a way that the density of the finished crosswound bobbin is increased and the run-off characteristics during further processing are optimized. For this purpose, in one variant parallel windings are introduced at intervals. In another variant, when the bobbin diameter is small the yarn is wound on at a smaller pitch angle than for a larger diameter. Furthermore, a traversing stroke which is reduced by comparison with the bobbin width is displaced along the bobbin width.

Abstract: An air jet spinning arrangement includes an essentially hollow cylindrical vortex chamber, whose peripheral wall forms a supporting surface for a peripheral surface of a rotationally symmetrical insert in the running-in area of the staple fiber strand. A number of air jet slits are worked into the peripheral surface of the insert, which air jet slits are completed to form closed compressed air channels by way of the supporting surface. The nozzle-like mouths of the compressed air channels are arranged on the front side of the insert facing the vortex chamber. The design of the air jet slits resemble a multiple-start thread.

Abstract: A process for preparing a piecing operation in an air jet spinning arrangement is described. The air jet spinning arrangement comprises a drafting device, whose main drafting zone is bordered on its entry side by an apron roller pair and on its exit side by a delivery roller pair. The apron roller pair is connected to a first drive, the delivery roller pair to a second drive. When the spinning process is interrupted, the delivery of a closed staple fibre strand is stopped in the main drafting zone and a new starting end of the staple fibre strand is created. This new starting end is to be pieced together with an end of a thread already spun. To create a new starting end of the staple fibre strand suitable for piecing, the apron roller pair and the delivery roller pair are each controlled separately when the spinning process is interrupted and are shut down one after the other, namely in such a way that in the main drafting zone a new starting end of the staple fibre strand is formed.

Abstract: A twin unit has two drafting devices for drafting fiber strands and is applicable in a spinning machine. The twin unit includes a common housing for the two drivable drafting devices, whereby the housing is detachably mounted in a machine frame. The drafting devices include a number of drivable bottom rollers and are arranged essentially mirror-symmetrical to one another. Each bottom roller has an area which drafts the fiber strand and is characterized in that the bottom roller has two bearing points. The two bearing points of each bottom roller are arranged one on either side of the area which drafts the fiber strand. In one variation, at least two opposite bottom rollers may form a bottom roller pair, in which the bearing points facing to the plane of symmetry of the twin unit are taken up in a joint bearing take-up. In addition, a top roller in the form of a twin pressure roller may be assigned to a bottom roller pair.

Abstract: A spindle-shaped component for an air jet spinning arrangement is described. The component includes a base body and an attached tip, as well as a yarn withdrawal channel which extends through the base body and the tip, the first part of the yarn withdrawal channel being an entry opening in the tip. The spindle-shaped component also has an injection channel which runs into the yarn withdrawal channel, the injection channel being directed in the direction of the entry opening of the yarn withdrawal channel. The injection channel is formed by a surface area of the base body and a surface area of the tip.