Systems for controlling the movement of threads in systems for treating threads for carpets. Disclosed is a device for guiding a strand of at least two threads on a transporter structure, characterized in that the device employs a mechanism for generating false twists between the at least two threads of the strand.

A device and a method for winding a roving onto bobbin tubes using a turret winding head is provided. The turret winding head has a turret base plate having a first and a second spindle that are held in the turret base plate and are provided for receiving the bobbin tubes. The turret base plate and the spindles are each provided with their own drive. The longitudinal axes of the spindles are aligned in the vertical direction.

A device and a method for winding a roving onto bobbin tubes using a turret winding head is provided. The turret winding head has a turret base plate having a first and a second spindle that are held in the turret base plate and are provided for receiving the bobbin tubes. The turret base plate and the spindles are each provided with their own drive. The longitudinal axes of the spindles are aligned in the vertical direction.

A spinning preparation machine for producing a roving from a fiber bundle includes a vortex chamber having an infeed opening for the fiber bundle and a yarn forming element extending at least partially into the vortex chamber. The spinning station includes spin nozzles, which lead into the vortex chamber in the region of a wall enclosing the vortex chamber and via which air is introduced into the vortex chamber in a specified direction of rotation in order to set the fiber bundle, which is fed in a transport direction, into rotation in the region of an inlet mouth of the yarn forming element. The yarn forming element includes a draw-off channel, which adjoins the inlet mouth and via which the yarn can be drawn out of the vortex chamber. The wall of the vortex chamber has a transition section, which adjoins the infeed opening, and has the shape of the circumferential surface of a truncated cone, and the diameter of which increases in the transport direction. The spin nozzles lead into the vortex chamber in the region of the transition section and each has a direction of flow that is oriented in the direction of an outer surface of the wall enclosing the vortex chamber.

A spinning preparation machine for producing a roving from a fiber bundle includes a vortex chamber having an infeed opening for the fiber bundle and a yarn forming element extending at least partially into the vortex chamber. The spinning station includes spin nozzles, which lead into the vortex chamber in the region of a wall enclosing the vortex chamber and via which air is introduced into the vortex chamber in a specified direction of rotation in order to set the fiber bundle, which is fed in a transport direction, into rotation in the region of an inlet mouth of the yarn forming element. The yarn forming element includes a draw-off channel, which adjoins the inlet mouth and via which the yarn can be drawn out of the vortex chamber. The wall of the vortex chamber has a transition section, which adjoins the infeed opening, and has the shape of the circumferential surface of a truncated cone, and the diameter of which increases in the transport direction. The spin nozzles lead into the vortex chamber in the region of the transition section and each has a direction of flow that is oriented in the direction of an outer surface of the wall enclosing the vortex chamber.

A spinning position on an air-jet spinning machine has a yarn-forming element extending at least partially into the turbulence chamber; and air jets directed into the turbulence chamber to impart to the fiber strand a twist in the area of an intake mouth of the yarn-forming element. A guide arrangement for guiding the fiber strand is situated in the area of the inlet port of the turbulence chamber and comprises at least two guide sections spaced a distance apart from one another, their mutual spacing decreasing in at least some sections in the direction of conveyance of the fiber strand. The guide arrangement also comprises at least one central guide element, which extends at least partially between the guide sections in a section running perpendicular to the longitudinal axis of the draw-off channel and produces a deflection of the fibers of the fiber strand perpendicular to the longitudinal axis of the draw-off channel.

A spinning position on an air-jet spinning machine has a yarn-forming element extending at least partially into the turbulence chamber; and air jets directed into the turbulence chamber to impart to the fiber strand a twist in the area of an intake mouth of the yarn-forming element. A guide arrangement for guiding the fiber strand is situated in the area of the inlet port of the turbulence chamber and comprises at least two guide sections spaced a distance apart from one another, their mutual spacing decreasing in at least some sections in the direction of conveyance of the fiber strand. The guide arrangement also comprises at least one central guide element, which extends at least partially between the guide sections in a section running perpendicular to the longitudinal axis of the draw-off channel and produces a deflection of the fibers of the fiber strand perpendicular to the longitudinal axis of the draw-off channel.

The invention relates to a method for operating a textile machine which serves to produce roving (1), wherein during roving production a roving (1) having a protective twist is produced by means of at least one consolidating means from a fiber bundle (3) that is fed to the consolidating means, wherein the roving (1) produced by the consolidating means is wound by a winding device (5) onto a tube (7), wherein the roving (1) during the winding process is guided by means of a guide element (23) which is arranged between the consolidating means and the tube (7), and wherein the guide element (23) exerts a decelerating effect on the roving (1). According to the invention, it is proposed that the decelerating effect is adapted during operation of the textile machine in such a way that it is lower during a start procedure, while the roving (1) leaving the consolidating means is being brought into contact with a tube (7), preferably an empty tube (7), and/or during a tube change, while a wound tube (7) is being replaced by an empty tube (7), than during a winding process that takes place between the start procedure and the tube change. A textile machine for producing a roving (1) is also described, said textile machine having at least one controller which is designed to operate the textile machine in accordance with the method according to the invention.

The invention relates to a method for preparing a workstation for the resumption of the spinning process on an air-jet spinning machine, in which after an interruption of spinning, the yarn (5) is guided back into its working path behind a spinning nozzle (4), or the yarn (5) is stopped in controlled manner in its working path with the end of yarn (5) situated behind the spinning nozzle (4), the end of yarn (5) is introduced into an outlet opening (41) of the spinning nozzle (4), whereupon the yarn (5) is transported by the reverse motion with the aid of the spinning nozzle (4) and a feeding device (3) of fibers as far as to a guide channel (2) in front of the spinning nozzle (4), whereupon a spinning-in end of yarn (5) is formed on the yarn (5) in the guide channel (2) and simultaneously the formation of yarn reserve is started in an underpressure yarn storage device (73) in front of a winding device (9) of yarn (5). The reverse motion of the yarn (5) to the guide channel (2) is performed by the reverse motion of a drawing-off mechanism (6) of yarn (5) of the workstation.

The invention also relates to an air-jet spinning machine with means for preparing a workstation for the resumption of the spinning process, whereby each workstation of the air-jet spinning machine comprises a drafting mechanism (1) of sliver (0), which is with its outlet (11) aligned with an inlet (30) of a feeding device (3) of fibers, which is with its outlet (31) aligned with an entry (40) of fibers to the spinning nozzle (4), whereby the space between the outlet (11) of the drafting mechanism (1) of sliver (0) of fibers and the inlet (30) of the feeding device (3) of sliver (0) is aligned with an exit portion (22) of a guide channel (2), which is at a certain distance from its exit portion (22) provided with a device (20) for the preparation of the spinning-in end of yarn and the workstation is provided with means for the unwinding of the yarn (5) against the direction in which the yarn (5) moves upon its formation. The workstation is provided with means for controlled reverse displacement of the formed spinning-in end of yarn (5) through the guide channel (2) to a defined position behind the device (20) for the preparation of the spinning-in end of yarn.

The invention relates to a method for preparing a workstation for the resumption of the spinning process on an air-jet spinning machine, in which after an interruption of spinning, the yarn (5) is guided back into its working path behind a spinning nozzle (4), or the yarn (5) is stopped in controlled manner in its working path with the end of yarn (5) situated behind the spinning nozzle (4), the end of yarn (5) is introduced into an outlet opening (41) of the spinning nozzle (4), whereupon the yarn (5) is transported by the reverse motion with the aid of the spinning nozzle (4) and a feeding device (3) of fibers as far as to a guide channel (2) in front of the spinning nozzle (4), whereupon a spinning-in end of yarn (5) is formed on the yarn (5) in the guide channel (2) and simultaneously the formation of yarn reserve is started in an underpressure yarn storage device (73) in front of a winding device (9) of yarn (5). The reverse motion of the yarn (5) to the guide channel (2) is performed by the reverse motion of a drawing-off mechanism (6) of yarn (5) of the workstation.

The invention also relates to an air-jet spinning machine with means for preparing a workstation for the resumption of the spinning process, whereby each workstation of the air-jet spinning machine comprises a drafting mechanism (1) of sliver (0), which is with its outlet (11) aligned with an inlet (30) of a feeding device (3) of fibers, which is with its outlet (31) aligned with an entry (40) of fibers to the spinning nozzle (4), whereby the space between the outlet (11) of the drafting mechanism (1) of sliver (0) of fibers and the inlet (30) of the feeding device (3) of sliver (0) is aligned with an exit portion (22) of a guide channel (2), which is at a certain distance from its exit portion (22) provided with a device (20) for the preparation of the spinning-in end of yarn and the workstation is provided with means for the unwinding of the yarn (5) against the direction in which the yarn (5) moves upon its formation. The workstation is provided with means for controlled reverse displacement of the formed spinning-in end of yarn (5) through the guide channel (2) to a defined position behind the device (20) for the preparation of the spinning-in end of yarn.