Abstract: The travelling piecer carries a lever to separate the nip rollers, a yarn reserve forming device to receive the yarn and a threading device for threading a broken yarn from a package between the nip rolls and through the yarn reserve forming device. The piecer also has a control which effects a piecing operation in which a clutch is actuated to feed fiber into the spinning unit while yarn is back-fed into the unit from the yarn reserve. At the completion of a predetermined time period (T) the nip rolls are re-engaged to withdraw the re-pieced yarn.

Abstract: In a false twist spinning unit a fiber sliver is removed from a fiber sliver can and fed into a drafting mechanism. The fiber aggregation delivered by the drafting mechanism is received by a suction portion of a spinning unit and is passed to a twist-imparting element which produces a spun yarn. The spun yarn is withdrawn by a roller pair and passes via a yarn monitoring device to a winding unit. The suction pressure required for the suction portion is produced by a suction device. In the event of blockage of the suction portion, a cleaning element or device is activated. After cleaning of the suction portion is completed, spinning is restarted.

Abstract: Each of the operating stations is provided with a signal directing means for emitting a call signal indicating a need for servicing, a positional reference marker in order to initiate a braking operation and a locating reference marker for exactly locating a service tender relative to the operating station.The service tender carries a signal receiving means for receiving a call signal emitted for an operating station during passage by the operating station. In addition, the service tender includes a sensor which is responsive to the positional reference marker of the operating station to be serviced which serves to initiate braking of the motor for the service tender. Further, the service tender carries a locating device which cooperates with the locating reference marker of the operating station in order to locate the tender relative to the operating station for servicing purposes.

Abstract: A process for replacing spent roving packages with new roving packages, with automatic splicing and reattachment of the rovings, on machines to spin carded wool is disclosed. The new roving package is removed from a conveyor and brought to a waiting position, where the end of the new roving is manually placed in a gripper. When the old roving package is almost exhausted, the spindle of the spinning machine is stopped and the roving is sheared. The end of the roving still attached to the spinning machine is retained with an aspirator. The new roving package is then brought to the working position, causing the automatic discharge of the spent roving package, and the gripper brings the new roving to the aspiration site causing the intermingling of the fibers of the two rovings. The spindles are restarted and the spliced segments of the roving receives a false twist and subsequent real twists.

Abstract: A splicer device for making a splice between two yarns by the mechanical removal and recomposition of twists having rings to untwist and retwist yarn, grippers to pluck and/or tear excessive yarn tail ends and form small retaining yarn tails, and any of an adjustable cam to separately condition untwisting and retwisting, a spacer to keep the surfaces working on the yarn at least for a moment a distance apart, movable portions on the grippers that move in opposite directions, and a tensioner to permit drawing action.

Abstract: An initial threading mechanism provides for simple but effective threading of the elongated hollow shaft of a vacuum spinning apparatus. Connected textile fibers are fed into the first end of the elongated hollow shaft, into the passageway which extends through the shaft from its first end to a second end. A vacuum tube is mounted for rotation about an axis parallel to and spaced from the axis of rotation of the hollow shaft. When a first open end of the vacuum tube is pivoted into an operative position adjacent the second end of the shaft, and in alignment with the shaft passageway, the vacuum tube connects up to a source of vacuum and draws a segment of the connected fibers completely through the passageway.

Abstract: In the case of an open-end friction spinning machine having a plurality of spinning units that are arranged next to one another and having a movable servicing apparatus carrying out a piecing process, it is provided that approximately in the extension of the yarn formation zone facing away from the withdrawal device, a twist blocking device is provided for receiving a yarn end that is returned beyond the feeding point. The device for the yarn withdrawal is switched on when the yarn end is in the yarn formation zone of the friction elements so that the yarn end is opened up into a fiberbeard that is suitable for piecing while being held by the twist blocking device.

Abstract: A method of yarn piecing by splicing in a fasciated yarn spinning unit is disclosed herein, according to which an end of a fleece to be lapped over a broken end of a yarn is formed by stopping a preselected pair of drafting rollers and, if any, its preceding pair or pairs of drafting rollers, in response to a yarn-break signal. After a fleece end is thus prepared, the front top drafting roller is lifted from its bottom counterpart, and a broken yarn end on the yarn package is brought reversely through the false-twisting nozzle and on through a gap formed between the separated top and bottom rollers of the front pair. In order to allow the yarn end to overlap with the fleece end over the desired length, the lifted front top roller is brought back into pressing engagement with its bottom roller in close relation to the time at which the nip of the front pair of drafting rollers is reached by the fleece end which is advanced by restarting the previously stopped drafting rollers.

Abstract: A method of yarn piecing in a fasciated yarn spinning unit is disclosed by which a yarn having a broken end and drawn out from the yarn package is introduced through the false-twisting nozzle by conducting an intermediate portion of the yarn into a slit which is formed on a lateral side of the nozzle and extends to the yarn passage channel in the nozzle. Because the yarn has been previously cut into a predetermined length thereof, the cut end of the yarn is placed in the drafting zone of the drafting mechanism at a position where the cut yarn end overlaps a broken end of the fiber bundle. By restarting the spinning operation, the overlapping ends of the yarn and fiber bundle are drafted properly in the drafting zone and then the fibers in the overlapping ends are intermingled by the false-twisting effect of the rotary stream of jetted air while they are advanced through the false-twisting nozzle.

Abstract: Device for splicing yarns together by subjecting the superposed ends of yarns to the action of a compressed fluid. A fluid supply system of a fluid treatment section having a yarn splicing member for making a jet of a fluid act on the overlapping section of two yarn ends, and untwisting nozzles for untwisting the yarn ends, and a functional system of a yarn end control unit for cutting and locating the yarn ends are connected to a single driving source.

Abstract: For the stopping and starting of an open-end friction spinning unit or of a spinning machine consisting of a plurality of such open-end friction spinning units, it is provided that the switching-off of the drives takes place in such a controlled manner that the yarn end forming by means of the switching-off of the fiber supply remains in the sphere of action of an auxiliary suction device. As a result, the restarting and the connected piecing are facilitated since the yarn end, in a controlled manner, remains inside the spinning unit and does not have to be returned by additional means. The yarn end is sucked into an auxiliary suction device and is preferably clamped in at least during the stoppage of the spinning unit or of the machine.

Abstract: The invention relates to a process for piecing on a machine for producing core spun yarns, said process comprising the following successive steps of: taking off a broken end of a core spun yarn formed from the receiving member, (for example a reel); exposing the internal core of said yarn over a pre-determined length; connecting the core thus exposed with the end of the elementary core yarn; introducing the bared core into the fiber distribution system; distributing the fibers on the core downstream of the point of join; and advancing and winding normally. The invention also relates to a device for carrying out this process.

Abstract: A noise control system for reducing the noise level emanating from an air jet spinning machine includes an acoustical door for covering a jet chamber which contains the air jets. The door is automatically opened whenever a yarn suction tube is to be inserted into the jet chamber for a threading-up operation.

Abstract: The invention consists of a splicer device to disassemble and recompose yarn mechanically, whereby the splicer device comprises facing disks to untwist and retwist mechanically two yarns positioned between the two disks, a cutter to eliminate excessive tail ends of yarn protruding from the two disks, a crank to set the two disks in rotation, a cam to actuate the cutter that eliminates the excessive tail ends, a lever, cam and spring to provide variable, elastic thrust, momentarily between the two disks, and an actuator which cooperates at least partly with one single programmed actuator.

Abstract: A procedure for splicing textile yarns mechanically whereby two yarns which are initially placed crosswise, awry or parallel to each other are first untwisted and then retwisted together by two rings, the rings being placed face to face and opposite to each other and act on yarns positioned between the rings, and whereby the excessive tail ends are eliminated and the yarns are untwisted up to a desired value in positions of mutual non-interference and are then brought together until they are substantially pressed against each other and are clamped at a position lying at about the beginning of the desired taper of each remaining tail end in cooperation with the rings so as to determine the length of the remaining tail ends and to effect a plucking/tearing action on the tails to be discharged, thereby obtaining progressive remaining tail ends before the retwisting action, and whereby the remaining tail ends are doubled and retwisted at least by the rings, which control the tail ends in at least two points locat

Abstract: Splicing head operated by a compressed gas for use in an automatic splicing device for producing by splicing a thread connection without knots, having a splicing head with at least two openings to admit the compressed gas, which accepts the two threads which are to be joined together, and has the capability to effect the mutual tangling, interwining, mixing and/or winding around of the fibers of the thread and which is provided at both ends of the splicing channel with thread- and air guides which cover the ends of the splicing channel asymmetrically so that only a part of the termination of the splicing channel remains free and which includes thread- and air guides connected with a removable cover which covers the splicing channel.

Abstract: A nozzle for the pneumatic release of a broken yarn end in a spinning or twisting frame has a plurality of mutually parallel closely spaced passages trained at an angle to the yarn package so that the individual jets in closely spaced relationship are collectively effective to liberate the broken yarn end and enable it to be captured by a suction hood.

Abstract: The invention relates to an apparatus for splicing textile threads by means of compressed air in a mixing chamber, with a device for pretreating the ends of the threads which comprises nozzles controllably feedable with compressed air and arranged at the sides of the body in which the mixing chamber is defined. The jets of air caused to leave the nozzles interfere with the cut ends of the threads laterally leaving the mixing chamber and cause them to be subjected to flapping and to a free whipping for opening and separating the fibres and putting the latter parallel to each other. A whirling motion may be imparted to the jets of air to remove the original twist from the fibres.

Abstract: A process and apparatus for piecing a yarn at a spinning unit of an open-end friction spinning machine is disclosed. Before the return of the yarn end, the wedge-shaped yarn forming gap is exposed by moving away a lid-type component containing at least one part of the fiber feeding channel, after which the yarn end is introduced into the mouth of the fiber feeding channel of this lid-type component, and subsequently, the lid-type component is returned to its position covering the wedge-shaped gap. Subsequently, the actual yarn piecing process is carried out by switching on the yarn withdrawal device and the yarn feeding device as well as by the transfer of the end of the yarn end to the wedge-shaped gap.

Abstract: A nozzle for liberating a broken yarn end from a yarn package in a spinning or twisting frame is either tiltable or has selectively actuatable orifices to alter the angle at which the jet or jets for dislodging the broken yarn end is trained to the yarn package. The change in the angle is effected during the course of package building and the liberated yarn end can be captured by a suction hood.

Abstract: A make-ready unit for making a thread end ready preparatory to connecting it with another thread end in a thread splicing device, the make-ready unit having a thread splicing device, the make-ready unit having a thread channel formed in a hollow body and traversible by a gas flow produced by injected gas, the thread channel being open at both ends for receiving the thread end transitorily therein, including a pressure-gas guiding device formed as a first ring channel surrounding the hollow body and having at least one pressure-gas supply location, the thread channel being formed with a thread inlet end through which the thread end is received and having a funnel-shaped flaring portion at the thread inlet end extending from a main cylindrical part of the thread channel, and a likewise funnel-shaped cover formed with a central opening and covering the funnel-shaped flaring portion of the thread channel in such manner that a second ring channel defined by conical surfaces extends from the first ring channel to t

Abstract: A process and apparatus is disclosed for improving the start-spinning of yarn on an open end friction spinning machine. To facilitate an exact alignment of the return yarn end to be pieced up with newly supplied incoming fibers, the respective spinning units are provided with a moveable cover part which in the open position exposes the yarn forming wedge slot between the friction rollers. Devices are provided for returning the yarn end and holding the same at a slight spacing from the friction rollers at the wedge slot and for sequentially timing the yarn draw off during start spinning with the activation of the fiber feed and the suction air flow related thereto.

Abstract: An open end friction spinning machine is described with a plurality of spinning units which respectively each include two similarly driven, adjacently arranged, friction rollers forming a wedge slot for forming yarn, an inlet and opening device for guiding in individual fibers to the wedge slot, a fiber feed channel connecting the inlet and opening device with the wedge slot, a withdrawal device for withdrawing the formed yarn in the direction of the wedge slot and a suction device to hold the formed and forming yarn in the wedge slot. To facilitate improved start spinning yarn connections, each spinning unit is provided in the region of the ends of the rollers opposite the withdrawal device with a guide element which securely holds the return guided yarn end portion in the region of the fiber feed opening of the fiber feed channel prior to the actual start spinning process.

Abstract: A method and apparatus is disclosed for restarting a yarn spinning apparatus, such as a wrap yarn spinning machine, and which involves the removal of an initial low quality interconnection in the form of a pieced-up segment, and its subsequent replacement with a high quality interconnection, without interrupting the yarn advance. For this purpose, the apparatus includes a first yarn accumulator for receiving the portion of the yarn which includes the pieced-up segment, and this portion is severed and removed. A second auxiliary yarn accumulator is also provided which is attached to a yarn splicing device, and which is operative to accumulate the advancing finished yarn during the brief time the splicing operation occurs. The brief accumulation time of the finished yarn in the auxiliary accumulator avoids the troublesome step of removing a large quantity of finished yarn from an accumulator.

Abstract: A spun yarn splicing device comprises a yarn splicing member having a yarn splicing hole, a fluid ejection nozzle for ejecting compressed fluid into the yarn splicing hole, and a slit opening into the yarn splicing hole for guiding yarn ends to be spliced into the yarn splicing hole, the yarn splicing hole being cylindrical in a cross section, the slit being directed tangentially to the yarn splicing hole and connected thereto at a junction, the fluid ejection nozzle opening toward a central axis of the yarn splicing hole adjacent to the junction and having a cross-sectional shape elongated in an axial direction of the yarn splicing hole. The yarn ends in the yarn splicing hole can be spliced together by the compressed fluid introduced from the fluid ejection nozzle into the yarn splicing hole.

Abstract: A method for yarn piecing in a fasciated yarn spinning unit, in which an air nozzle for twisting a fiber bundle to form a fasciated yarn is displaced from the normal spinning position to the threading position where the air nozzle can escape from the front roller pair, whereby a free space is prepared for applying a suction means having a sufficient suction force to reversely thread a yarn to be pieced through the air nozzle.

Abstract: This invention concerns an improved splicer (10) to splice textile yarns mechanically, the splice being obtained by coupling two single untwisted yarns (70-71) and reapplying the twists thereafter, part of such single yarns (70-71) being untwisted until twists of a sign opposite to the original twists have been imparted, such part then being doubled and remaining tails (270-271) being obtained, the doubled tract being then retwisted by imparting a required value of twist.

Abstract: A method for yarn piecing in a fasciated yarn spinning unit, in which a yarn portion to be pieced is always nipped by a piecing roller means during the piecing operation, whereby feeding length and speed of the yarn in the piecing operation can be accurately controlled by the piecing roller means. Thus, a complicated restarting operation can be carried out in accordance with a predetermined time schedule.

Abstract: A novel method for yarn piecing in a fasciated yarn spinning unit, in which a broken end of a yarn and the fiber bundle to be pieced together are nipped and intermingled with each other between a soft nipping area between middle top and bottom aprons and thereafter are false-twisted by a vortex in an air nozzle. Motions of the associated parts are controlled as so to be able to achieve a suitable overlapping length of the yarn and the fiber bundle in the nipping area of the aprons.

Abstract: This invention concerns improvements to procedures to splice yarns (20-21), whether textile yarns or otherwise, the splice being obtained by coupling two single untwisted yarns (20-21) and by reconstituting the twists thereafter, by which improvements a part of the single yarns (20-21) is untwisted until twists of a sign opposite to the sign of the original twists have been imparted, such part then being coupled and reduced tails (220-221) of yarns being obtained, the coupled tract then being retwisted until a required twist has been imparted, the improvements envisaging that the reduced tails (220-221) are obtained after the fibers to be plucked and/or torn (42) have been made substantially parallel and after a substantially axial plucking and/or tearing action has been applied to such fibers (42), and that the taper (320-321) of the remaining reduced tails (220-221) reaches the neighborhood of the periphery of retwister rings (28), the resulting remaining tails (220-221) being controlled and positioned besi

Abstract: A pneumatic yarn splicing method and apparatus for spun yarns. Extremities of ends of the yarn which are inserted in overlapping and oppositely directed relationship in a yarn splicing hole are in free conditions and at least two different points of the yarn ends within the splicing hole are individually acted upon by flows of a fluid turning in opposite directions.

Abstract: A spinning machine wherein a yarn knotting truck having a knotter provided thereon travels in a truck travelling spacing provided along a number of spinning units further includes an apparatus for automatically doffing winding packages which have yarns fully wound thereon. A doffing truck which has provided thereon a doffing apparatus travels in the truck travelling spacing.

Abstract: In a splice between ends of multi-ply yarn, each ply end (G1a, G1b) of an end of the multi-ply yarn (Z1) is disposed adjacent to an associated ply end (G2b, G2a) of the end of the other multi-ply yarn (Z2) so as to overlap it over a predetermined length (U1, U2), and each of these two ply ends (G1a, G2b, or G2a, G1b) has the respective other ply end (G1b or G2b) of the multi-ply yarn wrapped around it in the region of overlap (U1, U2), different regions of overlap (U1, U2) of a splice being disposed in the longitudinal direction of the multi-ply yarn without overlaps.

Abstract: A device for the uniform retrieval of yarn ends in an air spinning device. A suction force gradient is created between the air jet nozzle and the waste suction pipe. Gravitational force and the suction gradient cause broken yarn ends to drop from the air jet nozzle orifice toward the waste suction pipe. When yarn piecing is desired, a piecing suction pipe retrieves the yarn end from the nozzle orifice.

Abstract: A pneumatic yarn splicing apparatus comprising a yarn end untwisting means and a fluid jetting means for splicing lapped yarn ends by intertwining the yarn ends by the swirling air stream. X-figured guide groove comprising yarn end introducing grooves and yarn end untwisting grooves is formed on the nozzle block and a fluid jet nozzle for splicing the yarn ends is disposed at the intersecting portion of the guide groove.

Abstract: In the piecing operation, the broken ends of a yarn and a fiber bundle are sucked into a suction nozzle, and therein are entangled due to twists imparted to the fiber bundle by first vortices utilized for forming a fasciated yarn. The broken end of the yarn may be twisted in reverse of the fiber bundle by second vortices. Further, third vortices weaker than the first vortices may be used instead of the first vortices. The apparatus comprises jets for generating the second and third vortices and piping for transporting air to the jets and from the suction nozzle, as well as a control circuit thereof.

Abstract: Method for the knot-free connection of two threads formed of textile fibers of limited length having at least one twisted fiber strand, including a splicing device for mutually tangling, intermixing and intertwining individual fibers of the two threads, which includes inserting the two threads coming from opposite sides into the splicing device, trimming the end of each thread to a predetermined distance from the splicing device, vibrating, loosening, combing and separating the thread ends into individual fibers, cleaning and spreading apart each thread end by blowing compressed air into the splicing device obliquely to the longitudinal direction of the individual fibers and by beating, pulling and tearing with mechanical and pneumatic stresses in direction toward the thread ends, withdrawing the prepared thread ends from opposite sides up to the splicing device, tangling, mixing and hooking the individual fibers of the two thread ends to each other to form a splice connecting the threads after setting the sp

Abstract: An apparatus for locating a servicing device which travels along a parent textile machine, such as a spinning frame, having a plurality of stations and stops at any designated station of the parent machine to there perform a servicing operation, such as yarn piecing or cleaning by use of fluid, such as compressed air or vacuum, supplied from a fluid source provided separately from the servicing device. The apparatus comprises, on each station of the parent machine, a stationary connector communicating with the fluid source and a locating guide member having a locating guide groove therein, and, on the servicing device, an air cylinder, a locating rod actuated by the cylinder toward and away from the locating guide member and engageable with the guide groove and a communicating member movable together with the locating rod and engageable with the stationary connector.

Abstract: Splicer device to disassemble and recompose yarn mechanically whereby said device comprises belts to untwist-retwist the yarns to be spliced, the yarns undergoing an untwisting action in a position of mutual non-interference and an action of removal and discharge of excessive tail ends and also a retwisting action, a hook to displace sideways at least one of the yarns, an intermediate clamp, a securing and tearing cutter, retwisting belts, and a suction discharge for the tail ends.

Abstract: Yarns are pieced in a spinning machine utilizing an air stream, such as an open-end spinning machine or an air-jet spinning machine. For yarn piecing, an end of a yarn unwound from a bobbin is inserted into a twisting mechanism, and a sliver is newly supplied as a fleece so as to intertwine with the yarn end forming a pieced yarn portion. The thickness of the unwound yarn is detected by a detector and stored in a memory prior to insertion into the twisting mechanism. After the yarn and the sliver have been joined, the thickness of the pieced yarn portion is detected by the detector, and the detected thickness is compared with the stored thickness of the unwound yarn. If the thickness of the pieced yarn portion exceeds an allowable value as a result of such comparison, then the yarn is severed by a cutter, and thereafter a cut end of the yarn is pieced again with the fleece.

Abstract: A method and apparatus for supplying operational fluid to a traveling-type working machine, such as a yarn piecer or an auto-doffer, which serves a parent machine, such as a spinning frame. The working machine utilized in the present invention has a secondary fluid tank and at least one nozzle attached to an air cylinder. Prior to the working machine serving the parent machine, the nozzle is advanced by an air cylinder, operated by fluid supplied from the secondary fluid tank, so that it engages with one of the air intakes provided on the parent machine. Then operational fluid is introduced from a primary fluid source into the working machine through the engaged nozzle and air intake, and thereby the working machine carries out a specific operation for the parent machine. Simultaneously, the operational fluid is distributed to the secondary fluid tank in preparation for the next engagement of the nozzle and the air intake.

Abstract: Method and apparatus for supplying vacuum to a serving device which travels along a multi-station parent textile machine such as a spinning frame and providing a servicing operation such as yarn piecing or package doffing to the stations of the parent machine are disclosed, wherein a vacuum duct, which has vacuum outlet openings corresponding to the individual stations of the machine and lids rotatably supported for closing the vacuum outlet openings, is arranged along the parent machine and the servicing device includes a nozzle which takes in vacuum from the duct. The nozzle is advanced toward the vacuum duct just before the servicing device reaches a station which calls for the servicing, and the end of the nozzle rotates the lid to uncover its vacuum outlet opening and then is stopped in alignment with the opening. Then, the nozzle is moved with the servicing device to rotate the lid thereby closing the outlet opening, whereafter it is retracted to its original position.

Abstract: According to the method of the invention, the broken end of yarn and the end of the fibrous strand are caused to move simultaneously opposite to one another and, after the ends of yarn and the fibrous strand are brought close together, they are caused to deviate from the path of their initial movement and to run at a distance from one another in such a manner that during the untwisting of the end of yarn it engages the end of the fibrous strand to form a knot. In an apparatus for carrying out the method for piecing the end of yarn to the end of the fibrous strand, there is provided a device for gripping and transferring the end of yarn to the pulling device, which is formed by a pipe having an outlet pipe connected to a source of reduced air pressure.

Abstract: A pneumatic yarn splicing apparatus having a splicing member arranged in the central portion thereof. The splicing member comprises a yarn splicing hole of a cylindrical shape extending through the body of the splicing member, a slit extending along the splicing hole and two nozzles opened to the splicing hole in confronting relation. The two nozzles are so constructed that there is a time lag between the initiation of jetting at a first nozzle and the initiation of jetting at a second nozzle.

Abstract: Device for the partial straightening and parallelizing of fibers of a thread or thread end, including a turbine being drivable by compressed gas, the turbine including a rotor being accessible from outside the turbine, the rotor having a central opening formed therein being coaxial with the axis of rotation of the rotor for receiving a thread or thread end.

Abstract: An arrangement for winding yarn (3) from a supply roll (2) by means of a flyer (4) onto a bunch of wires fed through the center hole of the supply roll for automatically transferring to the unwinding of a new supply roll (2') when the yarn on the first supply roll (2) is used up or broken. The new supply roll (2') is disposed downstream of the first supply roll (2) seen in the direction of feed of the bunch of wires and a second flyer (4') is associated with it. Downstream of the new supply roll (2') and the second flyer (4') there is a holding device (13) to loosely hold the free end of the yarn (3') on the new supply roll (2') as long as the yarn (3) on the old supply roll (2) is not used up or broken. At its free end the yarn (3') on the new supply roll (2') is formed into a sliding knot (15) carried by the holding device (13), through which sliding knot the bunch of wires (1) is freely fed.

Abstract: A yarn slacking apparatus for slacking and retaining a fed yarn therein during the knotting operation in a winder. The sucking action is caused in the slack tube only when the knotting operation is carried out, while the sucking action of the slack tube is stopped by means of providing a shutter means for an opening of the slack tube, when the knotting operation is not conducted.

Abstract: A pneumatic yarn splicing apparatus for splicing spun yarns including two nozzle pipes for untwisting and attracting yarn ends to be spliced and a yarn splicing member having a yarn splicing hole which is disposed between the nozzle pipes. The nozzle pipes have opening areas reduced with respect to the diameter of the nozzle pipe to increase the speed of flow of the suction stream of air.

Abstract: Method and apparatus for splicing the ends of spun yarn includes means for inserting the yarn ends into a hole associated with a splicing nozzle having one or more air jet pipes, in which hole the ends are subjected to an air jet to join them each other. Yarn end control nozzles for the yarn on the package side and the yarn on the bobbin side are disposed at each end of the splicing nozzle to suck the yarn ends in the corresponding yarn end control nozzles, respectively and to keep the yarn ends free therein.

Abstract: Method for joining an upper thread with a lower thread, which includes moving at least one thread regulator from a thread receiving position to a thread delivery position, inserting the threads with the at least one thread regulator into a longitudinal groove formed in a splicing chamber, automatically admitting compressed air laterally into the splicing chamber for splicing the threads, automatically separating the ends of the upper and lower threads and blowing compressed air into the splicing chamber in dependence on the position of the at least one thread regulator, separating the threads to form new shorter thread ends, sucking up the newly-formed shorter thread ends with an air stream, and securing the newly-formed shorter thread ends and device for performing the method.