Abstract: A method is provided to operate an air jet spinning machine, having at least one spinning unit with a spinning nozzle for manufacturing yarn, in which a fiber strand is fed to the spinning nozzle through an inlet and is imparted a twist inside a vortex chamber of the spinning nozzle by means of a swirled air current so that a yarn is formed from the fiber strand. An additive is added with an additive dispenser to the spinning unit while the air jet spinning machine is operating and applied on the fiber strand or on sections of the spinning nozzle and/or the yarn. At least one physical parameter of the yarn is monitored by a sensor system wherein, based on a measured value supplied by the sensor system correlated with the parameter, it is determined whether and/or how much additive was applied.

Abstract: The invention relates to a method for operating a textile machine that serves for producing roving (2), wherein during normal operation, a fiber bundle (4) is supplied to at least one consolidating means of the textile machine, wherein a roving (2) having a protective twist is produced from the fiber bundle (4) by means of the consolidating means, wherein, after leaving the consolidating means and by means of a winding device (5) arranged downstream of the consolidating means in a transport direction (T) of the roving (2), the roving (2) is wound onto a tube (6), and wherein a sensor system (9) monitors whether a roving (2) is being produced by the consolidating means and/or whether the roving (2) produced by the consolidating means is being wound onto the tube (6).

Abstract: The invention relates to an apparatus on a spinning preparation machine having a drafting system (1) for processing a fiber material (G) which is moved by the drafting system in the direction of conveyance (F), including a plurality of roller pairs arranged one after the other with upper rollers and lower rollers (2, 3; 4, 5; 6, 7), having at least two elongated stripping devices (9) which are each in contact with one of the upper rolls (3, 5, 7) along their stripping edges (K) for removing dirt and other contaminants, and having a suction hood (AH) which is mounted above the stripping devices (9) and is connected to a vacuum source (U).

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: A device and a method are provided 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 devices for fixing the revolving flat at at least two points distributed on the longitudinal axis. The device comprises two chip-removal machining devices which are arranged outboard the clamping devices viewed in the direction of the longitudinal axis. A sliding guide is provided for accommodating the clamping devices in the device.

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: A device for compacting a fiber composite on a spinning machine includes consecutive drafting arrangement roller pairs. A compaction unit is pivotably mounted on the machine frame downstream of the delivery roller pairs with a pivot axis parallel to the rotational axes of the delivery roller pair, and includes a support with a suction drum rotatably supported on the support. At the end of a suction zone of the drum, a nip roller is fastened to the support to form a nip line. The support is spring-loaded to form a drive connection between the lower roller of the delivery roller pair and the suction drum, wherein the suction drum is moved against the lower roller. Guide means fix the compaction unit in position as mounted on the machine frame, and the spring element is mounted on the free end of the pressure lever.

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: A compacting unit for compacting a fiber composite supplied by a drafting unit of a spinning machine has a beam on which at least one suction drum equipped with a suction zone is rotatably mounted on an axle. A clamping roller mounted on the beam is in contact with the suction drum to form a clamping line at the end of the suction zone under the action of a pressure element mounted on the beam. The clamping roller is mounted so it is rotationally movable on a pressure arm that is equipped with a spring element and is mounted on the beam so it can pivot over a pivot axis.

Abstract: A spinning unit of an air-jet spinning machine for the spinning of a fiber composite 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 front 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: 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: 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.