Abstract: A device for compacting a sliver (V) on a spinning machine has a driven, revolving compaction element (17) that is acted on by suction air and which has a drive element (28, 29) that, in an operating position, forms a drive connection with a driven element (7, 7z) of the spinning machine while forming a first gearing stage (G1). To make the drive of the compaction device more flexible, a second gearing stage (G2) is provided between the drive element (28, 29) of the compaction element (17) of the first gearing stage (G1) and the compaction element (17).

Abstract: A device is provided for cleaning roller surfaces of rollers that are arranged one behind the other at a radial distance (b) from one another for processing fiber material (F) on a textile machine. A clearer roller is received in a guide of a clearer roller holder, wherein the guide is acted on by a spring element, and the clearer roller is pressed via a pressing force (AK) against the roller surfaces of the adjacent rollers. In order that by swiveling a top roller support arm upwards, the clearer roller is lifted off the roller surfaces to be cleaned and is able to adapt to different diameter ratios (Db/Da) of the rollers so that a consistent pressure distribution on the roller surfaces to be cleaned is ensured, the longitudinal direction (L) of the guide runs at a distance (a) to a plane (E) in which lie the two axes of the rollers that are arranged at a radial distance (b) from one another.

Abstract: The invention relates to a device for compacting a sliver (V) on a spinning machine. At least one rotatably supported nip roller (33) is associated with a compaction element downstream from a suction zone (Z) to form a nip line (P). The compaction element (17) and the nip roller (33) are rotatably supported on a shared support (20) that is detachably fastened to the spinning machine via fastening means (46). The compaction element (17) has at least one drive element (28) that forms a drive connection with a bottom roller (7) of a pair of delivery rollers (7, 8) via a weighting device (55, 58) when the compaction element is transferred from an idle position to an operating position. The support has a suction channel (SK) for the suction air of the compaction element (17).

Abstract: A yarn-producing apparatus for an air spinning machine, which is used for producing a yarn from a fiber strand with the assistance of an air flow, has a spinning tip with an inlet opening surrounded by the outer surface of the spinning tip, in the area of which a yarn is able to be produced with the assistance of the air flow. The yarn-producing apparatus has an internal inset with a draw-off conduit adjacent to the inlet opening for the yarn and several air outlets branching off on the side from the draw-off conduit, such that an air flow introduced counter to the direction of spinning (S) in the draw-off conduit can escape in part through the air outlets and in part through the inlet opening. In addition, a spinning unit with a corresponding yarn-producing apparatus is provided.

Abstract: The spinning station of a spinning machine includes a yarn end disposal means, arranged between the outlet of the spinning device and the winding device, and with the aid of which an end section of the produced yarn is separated from the rest of the yarn and eliminated. Furthermore, a process for removing an end section of a yarn at a spinning station of a spinning machine prior to the subsequent piecing process is proposed, wherein the end section is gripped, cut off, and subsequently eliminated from the area of the spinning station with the aid of a yarn end disposal means arranged between the outlet of the spinning device and the winding device.

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: A device is provided for cleaning roller surfaces of rollers that are arranged one behind the other at a radial distance (b) from one another for processing fiber material (F) on a textile machine. A clearer roller is received in a guide of a clearer roller holder, wherein the guide is acted on by a spring element, and the clearer roller is pressed via a pressing force (AK) against the roller surfaces of the adjacent rollers. In order that by swiveling a top roller support arm upwards, the clearer roller is lifted off the roller surfaces to be cleaned and is able to adapt to different diameter ratios (Db/Da) of the rollers so that a consistent pressure distribution on the roller surfaces to be cleaned is ensured, the longitudinal direction (L) of the guide runs at a distance (a) to a plane (E) in which lie the two axes of the rollers that are arranged at a radial distance (b) from one another.

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: 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.

Abstract: The invention relates to a device and a method for machining running surfaces on head end pieces of revolving flats. The device has a base frame with a longitudinal axis and is provided with clamping means for fixing the revolving flat at at least two points distributed on the longitudinal axis. The device comprises two chip-removal machining means which are arranged outside the clamping means viewed in the direction of the longitudinal axis. A sliding guide is provided for accommodating the clamping means in the device.

Abstract: The invention relates to a spinning unit of the air-jet spinning machine, which serves the purpose of producing a yarn (2) from a fiber composite (3), whereas the spinning unit (1) possesses a spinning nozzle (4) with a vortex chamber (6) featuring an inlet opening (5) for the fiber composite (3), whereas the spinning unit (1) features air jets (21) directed into the vortex chamber (6), which flow into the vortex chamber (6) in the area of a wall (7) surrounding the vortex chamber (6) and through which air jets, during operation of the spinning unit (1), compressed air can be introduced into the vortex chamber (6) in a given direction of rotation, in order to confer upon the fiber composite (3) a rotation in the specified direction of rotation, and whereas the air jets (21) are connected to a source of compressed air (9) with the assistance of at least one fluid connection (8).

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 spinning unit of an air-jet spinning machine for the spinning of a fiber composite. The spinning unit has a pair of delivery rollers and a spinning nozzle, whereas the spinning nozzle has a yarn formation element and a fiber guide element. The fiber guide element has a beginning turned towards the pair of delivery rollers and an end turned away from the pair of delivery rollers. The fiber composite is fed to the spinning nozzle with the pair of delivery rollers, and is introduced into the spinning nozzle through the fiber guide element, and subsequently a yarn is formed from the fiber composite through the yarn formation element. A tool for feeding an additive to the fiber composite is provided between the pair of delivery rollers and the end of the fiber guide element.

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: A method for monitoring contact of a rotating component of a textile machine, in particular of a clothing roller of a card, for example a card cylinder, with a further component of the textile machine. The two components are connected to an electrical power source, but are normally electrically isolated from each other, and only in the case of a contact between the two components, a short-circuit is generated, which is detected by the monitoring device. The duration of individual short-circuits per time unit (T) is detected and summed up so as to form a total duration (t) of all short-circuits per time unit (T).

Abstract: The invention relates to a device for compacting a fiber composite (V) on a spinning machine with a drafting arrangement unit (2) that includes consecutive drafting arrangement roller pairs (3, 4; 5, 6; 7, 8) having pressure rollers (4, 6, 8) that are retained on a pressure lever (10) that is pivotably supported on the machine frame (MR), and with a compaction unit (VM) that is pivotably mounted on the machine frame (MR) downstream of the delivery roller pair (7, 8) of the drafting arrangement unit (2), which has a pivot axis (MA) that extends parallel and at a distance relative to the axes of rotation (7a, 8a) of the delivery roller pair (7, 8) and includes a support (20) with at least one suction drum (17) that is provided with a suction zone (Z) and that is rotatably supported on the support, and upon the suction drum, at the end of the suction zone (Z), respectively one nip roller (33) is disposed that is fastened to the support (20), under the effect of a compressive-force element (F2), in order to achie

Abstract: The invention relates to a compacting unit (VM) for compacting a fiber composite supplied by a drafting unit (2) of a spinning machine, wherein the compacting unit (VM) has a beam (20) on which at least one suction drum (17) equipped with a suction zone (Z) is rotatably mounted on an axle (22) and a clamping roller (33) mounted on the beam (20) is in contact with the suction drum to form a clamping line (P) at the end of the suction zone (Z) under the action of a pressure element (F2) mounted on the beam. To improve the known devices of loading mechanisms for clamping rollers on suction drums (17), it is proposed that the clamping roller (33) is mounted so it is rotationally movable on a pressure arm (72) which is equipped with a spring element (F2) and is mounted on the beam (20) so it can pivot over a pivot axis (24).

Abstract: The method and corresponding device of yarn braking are provided by means of an attending device provided with a vacuum tube into which the end of the yarn is sucked in before commencement of braking. At drawing off from the vacuum tube, the yarn is braked between the braking surfaces of a stationary brake friction member and a moving brake friction member, which are arranged on the attending device displaceably to the track of the yarn. For generating the braking force, the moving brake friction member moves towards the stationary brake friction member and fits against it at a contact abscissa or a contact surface.

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).