Abstract: A method of adjustment of a workstation and a yarn clearer (yarn quality sensor (9)) at a workstation of a textile machine, in which measurement and/or calculation creates a reference value (PR) of a particular parameter of yarn (1), to which the current value (PP) of the particular parameter measured is compared during the continuous production of yarn. The reference value of the particular yarn parameter is determined as the reference value of (PfR) of the particular yarn parameter of deliberately defective yarn (1) intentionally produced at the particular workstation and subsequently it is compared to the current and/or reference value (PP, P0, PPR, P0R) of the particular parameter of yarn (1) produced at the particular workstation with production quality or higher than production quality.

Abstract: The present invention relates to a traversing element (1) for a spinning machine (26), wherein the traversing element (1) comprises a guide segment (2) by means of which a roving (3) may be guided in the region of a surface of a tube (4) or of a roving bobbin (5), and wherein the traversing element (1) comprises a support segment (6) via which it may be connected to a support member (7) of the spinning machine (26). According to the invention it is suggested that the traversing element (1) comprises at least one cavity (8) that is closed with respect to the outside and is partially filled with a liquid (9), wherein heat that occurs in the region of the guide segment (2) due to friction between the guide segment (2) and the roving (3) guided by the guide segment (2) when the traversing element (1) is operating may be absorbed by the liquid (9). In addition, a spinning machine (26) having a corresponding traversing element (2) is proposed.

Abstract: The invention relates to a spinning preparation machine having at least one consolidating means for producing a roving (3) that has a protective twist and that is made of a fiber bundle (4) supplied to the consolidating means, having a drafting system (5) for drafting the fiber bundle (4) before the latter enters the consolidating means, wherein the drafting system (5) is arranged upstream of the consolidating means in a transport direction (T) of the drafting system (5), having a guide (6) arranged upstream of the drafting system (5) in the aforesaid transport direction (T) for guiding the fiber bundle (4) between a container (7) providing the fiber bundle (4) and the drafting system (5), wherein the guide (6) has a feed segment (8) facing away from the drafting system (5) for the fiber bundle (4) originating from the container (7) when the spinning preparation machine (1) is in operation, and has a delivery segment (9) facing the drafting system (5) for the fiber bundle (4), wherein the spinning preparation

Abstract: The invention relates to a spinning preparation machine having at least one consolidating means for producing a roving (3) that has a protective twist and that is made of a fiber bundle (4) supplied to the consolidating means, having a drafting system (5) that is arranged upstream of the consolidating means in a running direction (L) of the roving (3) and that serves for drafting the fiber bundle (4) before the latter enters the consolidating means, having winding device (6) that is arranged downstream of the consolidating means in the aforesaid running direction (L) and that serves for winding the roving (3) onto a tube (7), and having a movably mounted traversing element (8) arranged in the region of the winding device (6) that serves for guiding the roving (3) while the latter is being wound onto the tube (7).

Abstract: A spinning nozzle for an air-jet spinning machine has a base body with an internal turbulence chamber, an inlet opening for the fiber sliver which enters the turbulence chamber and a fiber guide channel for guiding the fiber sliver entering the inlet opening. A thread-forming element extends at least partially into the turbulence chamber and has an inlet mouth as well as an adjoining take-off channel for the thread in the transport direction. Air nozzles are directed into the turbulence chamber. The spinning nozzle has an extension piece that is releasably fixed to the base body in the region of the inlet opening, wherein the fiber guide channel adjoining the inlet opening is formed at least partially by a channel section of the extension piece.

Abstract: A roving machine and method for producing a roving from a fiber sliver has at least one spinning station with a vortex chamber, an infeed opening for the fiber sliver, and a roving forming element in the form of a spindle that has an inlet port and extends at least partially into the vortex chamber. The vortex chamber is associated with spinning nozzles through which air can be guided into the vortex chamber to impart, after a piecing process, a protective twist to the fiber sliver in the region of the inlet port. The spindle has a draw-off channel via which the roving provided with the protective twist is drawn out of the vortex chamber. Piecing nozzles are additionally associated with the vortex chamber, wherein each of the piecing nozzles has a flow direction which is aligned in the direction of the inlet port of the spindle.

Abstract: The invention relates to a spinning position (22) on an air-jet spinning machine, which serves to produce a yarn (1) from a fiber strand (2) consisting of fibers, wherein the spinning position (22) has a turbulence chamber (3) with an inlet port (4) for the fiber strand (2) entering the turbulence chamber (3) in a direction of conveyance during operation of the air-jet spinning machine and has a yarn-forming element (5) extending at least partially into the turbulence chamber (3); wherein the spinning position (22) has air jets (6) directed into the turbulence chamber (3), these air jets opening into the turbulence chamber (3) in the area of a wall (21) surrounding the turbulence chamber (3), air being introduced into the turbulence chamber (3) through these jets in a predefined direction of twist to impart to the fiber strand (2) a twist in the aforementioned direction of twist in the area of an intake mouth (7) of the yarn-forming element (5); wherein the yarn-forming element (5) has a draw-off channel (8),

Abstract: The invention relates to a spinning nozzle for an air-jet spinning machine which is used for producing a thread (2) from a fiber sliver (3), wherein the spinning nozzle (1) has a base body (4) with an internal turbulence chamber (5), wherein the spinning nozzle (1) has an inlet opening (6) for the fiber sliver (3) which enters the turbulence chamber (5) in a transport direction when the air-jet spinning machine is operating, wherein a fiber guide channel (7) for guiding the fiber sliver (3) entering the inlet opening is provided between the inlet opening and the turbulence chamber (5), wherein the spinning nozzle (1) has a thread-forming element (8) which extends at least partially into the turbulence chamber (5) and has an inlet mouth (9) as well as an adjoining take-off channel (10) for the thread (2) in the transport direction, and wherein the spinning nozzle (1) has air nozzles (11) which are directed into the turbulence chamber (5) and which open out into the turbulence chamber (5) in the region of a wal

Abstract: The invention relates to a drive unit for powering a turret winding head for winding roving onto bobbin tubes. The drive unit comprises a closed housing, a first and a second spindle disposed in a turret base plate, wherein the turret base plate is formed as part of the housing and the spindles are disposed outside of the housing, and a first drive for the first spindle and a second drive for the second spindle, wherein the drive means are disposed inside the housing, and the first and second drives are each provided with a fan wheel. An intake duct, through which air is drawn in by the fan wheel from outside of the housing, is in each case provided on the intake side of the fan wheel of the first and second drives.

Abstract: The invention relates to a roving machine for producing a roving (1) from a fiber sliver (2), wherein the roving machine comprises at least one spinning station (3) which has a vortex chamber (4) with an infeed opening (5) for the fiber sliver (2) and a roving forming element in the form of a spindle (6) that has an inlet port (10) and extends at least partially into the vortex chamber (4), wherein the vortex chamber (4) is associated with spinning nozzles (19) through which air can be guided into the vortex chamber (4) in order to impart, after a piecing process, a protective twist to the fiber sliver (2) in the region of the inlet port (10), and wherein the spindle (6) has a draw-off channel (9) via which the roving (1) provided with the protective twist can be drawn out of the vortex chamber (4).

Abstract: The invention relates to a presser finger (4) which is a component of a winder for winding a roving on to a rotating bobbin (1) with a longitudinal axis (10). The presser finger (4) has a carrying arm (40) with a longitudinal axis (8) and a roving guide element. The presser finger (4) also has a guide plate (5) for guiding the roving on to a rotating bobbin (1). The presser finger (4) is alternatingly movable in the direction (X) of the longitudinal axis (10) of the rotating bobbin (1), and this movement of the presser finger (4) is provided by a drive means. The invention also relates to a roving winder with the aforementioned presser finger (4) and a method of winding a roving with the aid of the aforementioned presser finger (4).

Abstract: An air spinning device has a nozzle body and a hollow spindle with a spindle tip and a longitudinal axis, wherein the spindle tip protrudes into the nozzle body. An outlet channel having a ring-shaped cross-sectional area is formed between an outside surface of the spindle tip and an inside surface of the nozzle body. The gap width at a certain location of the outlet channel normal to the longitudinal axis of the spindle is constant over the circumference of the spindle. The outside surface of the spindle tip and/or the inside surface of the nozzle body is/are shaped in such a way that at least two constrictions are formed in the outlet channel in its course in the direction of the longitudinal axis of the spindle, wherein the outlet channel has a ring-shaped cross-sectional area at each of these constrictions smaller than the ring-shaped cross-sectional area of the outlet channel upstream and downstream from each of these constrictions.

Abstract: Air spinning device (1) having a nozzle body (2) and a hollow spindle (3) with a spindle tip (8) and a longitudinal axis (7), wherein the spindle tip (8) protrudes into the nozzle body (2) and an outlet channel (13) having a ring-shaped cross-sectional area is formed between an outside surface (11) of the spindle tip (8) and an inside surface (12) of the nozzle body (2), and the gap width (S) at a certain location of the outlet channel (13), as seen normal to the longitudinal axis (7) of the spindle (3), is constant over the circumference of the spindle (3).