Abstract: There is described an automatic device for restarting a two-for-one twisting station after yarn interruption, the device being provided on a carriage which patrols the twisting machine faces and is equipped to discharge a completed bobbin, seize the yarn ends from the feed side and the bobbin side and convey them to a joining device, join said ends, pick up a new tube and position it on the bobbin carrier arm, bring the yarn ends on the feed side up to it and restart the station, so restoring the yarn flow.

Abstract: In the case of a spinning machine having a plurality of spinning stations spinning yarn from slivers and having transport devices for removing the slivers from cans and for guiding the slivers to the spinning stations, it is provided that, for the preparation of the start spinning of the spinning machine, the slivers are first deposited in receiving devices which are situated in the area of the outlet of the transport devices. Subsequently, the slivers are successively taken out of these receiving devices and are placed in the spinning stations.

Abstract: A method for pneumatic threading in a two-for-one twisting spindle having a double hollow mandrel. The method comprising seizing the initial portion of wound yarn from a bobbin positioned on the lower hollow mandrel in the spindle basket and feeding a sufficient length of it through the upper hollow mandrel to enable it to be then placed alongside the initial wound yarn portion unwound from the bobbin mounted on the upper hollow mandrel. The two initial yarn portions are then held jointly and rested on the mouth of the upper hollow mandrel, on which a head connected to a compressed air source is placed and pressed, in order to achieve pneumatic yarn threading.

Abstract: A method and apparatus for disposing an end of roving of a roving bobbin at a disposing location adjacent the drafting device of a spinning station of a textile spinning machine The roving end disposing apparatus, which is preferably mounted on a traveling service unit which travels to the spinning stations of the textile spinning machine to perform roving feed start operations thereat in which the feed of roving from a roving bobbin through a drafting device is started, includes a roving end support assembly for supporting a roving end for movement between a receipt location at which the assembly receives the roving end and the disposing location adjacent the drafting device at which the supported roving end is released either for engagement by the drafting device or piecing of the roving end with roving extending from another roving bobbin through the drafting device.

Abstract: The present invention provides an arrangement wherein a carriage is provided so that the carriage may travel along units of a two-for-one twister disposed, the carriage comprising a yarn exchanging mechanism for exchanging an empty yarn package supported on a spindle of each unit with a yarn package, a yarn end fining mechanism for drawing a yarn end from the yarn package, a threading mechanism for inserting the yarn end into an axial hole of the yarn package by an air flow, a doffing mechanism for removing a winding package for full bundles supported on a cradle arm of each unit and supplying a paper tube to the cradle arm, and a yarn engaging mechanism for engaging the yarn end of the yarn package with the paper tube when the cradle arm supports the paper tube.

Abstract: This invention relates to a method for pneumatic threading in a double-twisting doubling frame having a double hollow pin twisting spindle, in which the two thread feeding bobbins are disposed coaxially, one above the other, in the head of the spindle, and each individual bobbin engages its own hollow pin, this method providing for removing the initial length of thread from the lower bobbin in order to advance it into the hollow pin of the upper bobbin and also removing the initial length of thread from the upper bobbin and holding together the two said initial lengths of thread so that they rest on the inlet of the upper hollow pin, a head connected to a source of compressed air coming towards and being pressed against said upper hollow pin, allowing for both the lateral displacement of the braking device and the injection of compressed air for pneumatic threading.

Abstract: A method for transporting a set or stack of yarn packages comprising at least yarn packages to a twisting machine as well as an apparatus for carrying out said method. The yarn ends of the packages are arranged in the interior of the hollow center of the package before the transportation. The yarn packages are creeled on a common, tubular adapter, which is provided on its upper end with a gripping head for engagement with a gripper and/or the transport element of a conveying system. Then the yarn ends F1 and F2 are arranged in the interior of the adapter and held therein during the entire transportation until the set of yarn packages is inserted into a spindle of the twisting machine. Once the set of yarn packages is inserted into the spindle, a yarn unwinding head permitting the entry of the yarns is added, and the yarn ends are guided through this unwinding head into the spindle.

Abstract: In the case of a spinning machine comprising several spinning stations for the spinning of yarns from slivers, the cans from which the slivers are withdrawn are deposited above the spinning machine. From the cans, sliver tubes lead to the spinning stations. The spinning machine has a vacuum duct extending in the longitudinal direction of the machine which comprises a connection opening which is closed during the operation for each spinning station. When the operation is interrupted, the connection opening can be opened up and connected with the pertaining sliver tube.

Abstract: The present invention provides an arrangement wherein a carriage is provided so that the carriage may travel along units of a two-for-one twister disposed, the carriage comprising a yarn exchanging mechanism for exchanging an empty yarn package supported on a spindle of each unit with a yarn package, a yarn end fining mechanism for drawing a yarn end from the yarn package, a threading mechanism for inserting the yarn end into an axial hole of the yarn package by an air flow, a doffing mechanism for removing a winding package for full bundles supported on a cradle arm of each unit and supplying a paper tube to the cradle arm, and a yarn engaging mechanism for engaging the yarn end of the yarn package with the paper tube when the cradle arm supports the paper tube.

Abstract: The present invention provides an arrangement wherein a carriage is provided so that the carriage may travel along units of a two-for-one twister disposed, the carriage comprising a yarn exchanging mechanism for exchanging an empty yarn package supported on a spindle of each unit with a yarn package, a yarn end fining mechanism for drawing a yarn end from the yarn package, a threading mechanism for inserting the yarn end into an axial hole of the yarn package by an air flow, a doffing mechanism for removing a winding package for full bundles supported on a cradle arm of each unit and supplying a paper tube to the cradle arm, and a yarn engaging mechanism for engaging the yarn end of the yarn package with the paper tube when the cradle arm supports the paper tube.

Abstract: Packages, particularly cross-wound packages are produced directly at a ring spinning frame. In a method and apparatus for making packages a rewinding device is provided for a group of spinning stations. The rewinding device comprises a fixed winding station and a gripping device movable along the group of spinning stations. The rewinding device is able to perform all the manipulations for starting up a spinning process with empty yarn carriers. It is also possible to change the full yarn carriers and mount the empty yarn carriers on a spinning frame, remove thread breaks and carry out spinning following a batch change. Spinning of the individual yarn carriers takes place individually, so that when replacing one yarn carrier, the other spinning stations continue to operate. This leads to a high production rate of the ring spinning frame and simultaneously reduces costs for rewinding compared with known systems.

Abstract: A spinning machine includes a yarn draw-off apparatus having a pair of rollers including a draw-off roller being continuously rotatable in a draw-off direction and a shiftable contact roller to be pressed against the draw-off roller for clamping a spun yarn in a gap between the rollers and transporting the yarn. A method and apparatus for drawing-off a yarn produced in the spinning machine include driving the contact roller at a predeterminable circumferential speed prior to beginning drawing-off yarn while the gap between the rollers is open, before pressing the contact roller against the draw-off roller for drawing-off the yarn and closing the gap between the rollers.

Abstract: A two-for-one twisting spindle for threading a thread by compressed air is comprised of a hollow axle with two cylindrical chambers. A thread storage disk with a thread guiding channel is connected to a lower end of the hollow axle, and a thread inlet tube is connected to the upper end. A thread brake comprising a braking cartridge, an upper and a lower braking ring, and a support is arranged inside the first cylindrical chamber. The braking cartridge, in a braking position, rests with an upper end at the upper and with a lower end at the lower braking ring. In a released position, the braking cartridge rests at the support. The lower braking ring is connected to a hollow piston slidable inside the first cylindrical chamber. A jet of compressed air generates a suction effect in the hollow axle and forces the thread from the thread inlet tube through the thread guiding channel.

Abstract: A method for starting an operation of a two-for-one twister after doffing. It includes steps of turning a spindle for a specific period of time before or while the yarn end from a feed yarn package side is held and wound on a paper tube by a suction pipe, rotating the paper tube and the spindle for bunch winding, and drawing the yarn up to the feed roller for general take-up operation.

Abstract: A spinning machine is disclosed which includes a plurality of spinning units which each spin two prestrengthened yarn components and guide them together to a double yarn. A movable servicing device is provided which can be applied to the individual spinning units and which, for feeding the double yarn to a spool tube inserted into a spinning unit wind-up device and driven to perform rotations, has a device that can be applied to the spool tube and is equipped with devices for the deflecting of a section of the double yarn into a direction extending approximately in parallel to the axis of the spool tube and for the transferring of the deflected section of the double yarn into the moving range of a driving device rotating together with the spool tube.

Abstract: A blow device for weft threads in weaving machines, in particular a blow device which makes use of a nozzle of the type which consists of a housing, a thread guide duct extending through the housing and a first or main blower situated in the housing and working with the thread guide duct to transport a weft thread to the shed of the weaving machine. The nozzle has a second or threading blower also situated in the housing that cooperates with the thread guide duct for threading the nozzle. The second blower has at least one blow duct which intersects the thread guide duct at an angle so as to thrust a weft thread presented at the entry of the thread guide duct through the thread guide duct when supplied with air. A central system deactivates the main blower when the threading blower is activated.

Abstract: In order to coordinate the movements of two movable parts on a spinning frame and a service robot, a system is provided in which one part carries two sensors which are used to detect the position of the other part within the respective measuring ranges of the sensors. This system provides for rough positioning of one part to the other at a relatively high speed until the first sensor detects the second part. Thereafter, coordination of the movements of the two parts takes place within narrow tolerance limits using the second sensor which has a narrow measuring range.

Abstract: A method and apparatus for preparing a yarn package for a subsequent yarn restarting operation are provided. The apparatus includes an air jet for directing a tangential stream of pressurized air against a yarn package to effect loosening of a length of auxiliary yarn which has been wound on the yarn package during a prior unsuccessful yarn restarting operation in which the auxiliary yarn length failed to piece with the yarn still to be wound onto the yarn package. The air jet operates in cooperation with a suction conduit to completely unwind the unsuccessfully pieced auxiliary yarn length from the yarn package to thereby prepare the yarn package for receiving another length of auxiliary yarn during a subsequent yarn restarting operation.

Abstract: A yarn threading apparatus is disclosed which is adapted for threading a yarn onto a yarn treatment device, such as the heating and cooling plates of a yarn false twist crimping machine. The threading apparatus comprises an elongate tube having a continuous longitudinal slot extending through the wall thereof, and a plurality of air injection nozzles positioned at longitudinally spaced locations along the length of the tube for forming a helical airstream through the interior of the tube. The yarn may thus be inserted into one end of the tube and entrained in the helical airstream so as to be advanced thereby through the tube and outwardly from the opposite end thereof, and with the helical configuration of the advancing yarn preventing it from withdrawing through the slot. The yarn may thereafter be withdrawn from the tube through the slot and onto the yarn treatment device, by imparting an axial force to the yarn.

Abstract: A two-for-one twisting machine, comprising twisting spindles each having a threading device arranged in the region of the spindle axis, through which a yarn is sucked in by the action of an injector and ejected by means of a compressed-air jet in upward direction through the space between the feed package pot and balloon limiter. A yarn catching ring placed on the upper annular gap of the space between the feed package pot and balloon limiter serves to catch and position the yarn, which ring has in its interior a closed annular channel with a cross section open toward the annular gap, and is connected, via a radially outward extending connecting end, with a source of underpressure. The underpressure permits the yarn to enter into the annular channel and advance to the connecting end, where it is finally positioned.

Abstract: An apparatus for aligning a textile strand supple device and a strand guide of a drafting device of a textile machine is provided for initially inserting a textile strand into the strand guide. The strand guide of the drafting device is typically reciprocally moved transversely to the direction of feed of the textile strand and the aligning apparatus of the present invention includes a device for securing the strand guide at a predetermined position along its reciprocating path at which a conventional movable service unit can be positioned for initially inserting a textile strand into the strand guide. According to another aspect of the present invention, the aligning apparatus includes a motor assembly for adjustably moving the textile strand supply device in response to the sensed position of the strand guide of the drafting device.

Abstract: A method is disclosed for automatically engaging and inserting sliver fed from a spinning can into a spinning unit by means provided on a movable unit which comprises providing a spinning can containing a quantity of sliver and positioning a segment of sliver located between a coiler and the spinning can on a vertical plane and a horizontal plane. A first portion of the segment of sliver is clamped, engaged and gripped by gripping means at a second portion other than at the first portion. The sliver is broken at a portion between the first and second portions to leave a first broken end of the sliver adjacent the first portion and a second broken end of the sliver adjacent the second portion. The second broken end of the sliver is positioned in correspondence with an intake of a condenser of the spinning unit, and is introduced in the intake of the condenser. Substantially simultaneously air is introduced under pressure downstream of the intake of the condenser.

Abstract: To piece with a spinning device having a pneumatic twisting unit, a yarn end is back-fed from an output side, through the twisting unit, to drawing equipment, and then inserted laterally into a pair of drawing unit output rollers, from where it is drawn off through the twisting unit in the form of a continuous yarn with a rove being incorporated into it. During the back-feeding of the yarn end to the twisting unit input side, the yarn end is conveyed to a grasping device located at the side of the drawing equipment. The grasping device pulls the yarn end for subsequent insertion into the pair of output rollers past such rollers until such end is alongside the drawing equipment. A yarn presenting device is provided to convey to the grasping device the yarn end leaving the twisting unit input side.

Abstract: A device for automatically spinning-in yarn in spinning units of open-end rotor spinning machines improves the process of leading the spinning-in head of the device onto the take-off tube of the spinning unit by using simple means.According to the invention the spinning-in head is attached to a swing lever by attaching means kinematically firmly in the plane of its swing motion but resiliently in the direction perpendicular to said plane, in order to allow the spinning-in head to move across the mouth of said take-off tube while being lead by a lead-on cone.

Abstract: A new weft yarn is supplied to a predetermined position in case when the weft yarn in a control unit, particularly in a loom, is broken. Conventionally, the supply of the new weft yarn is effected by a weaver. The present invention provides a yarn guide device for positioning, holding, and transferring a yarn to a predetermined position. The yarn in then drawn inside of a guide tube located in a predetermined position, and thereafter the yarn is automatically guided to a required device such as a measuring and storing device for the weft yarn.

Abstract: A spindle rotor is adapted (1) for use in a spindle of a textile thread processing machine, such as a two-for-one twister, in which the running thread being processed passes through an axially and radially extending thread passageway in the spindle and formed a rotating balloon around the spindle and includes means for supplying a flow of thread conditioning medium, fibrous material or other medium adapted to flow in a generally axial direction through the spindle and (2) to receive, guide and enhance the flow while performing the thread processing functions. The spindle rotor includes a hub member for rotatably mounting the spindle rotor in the machine spindle, a plurality of spaced-apart guide blades attached to the hub member and extending radially outwardly therefrom in a spoke-like manner for receiving the thread conditioning medium, and a radially extending thread passageway through the hub and one of the guide blades for receiving the running thread being processed.

Abstract: A suction gun has a first injection nozzle and a second injection nozzle. The first and second injection nozzles inject pressurized water, thereby to draw a yarn with a suction force of the pressurized water. The second injection nozzle has a plurality of jets, respective axes of which intersect with each other at an intersection point. The intersection point is located in a position displaced by E, which is preferably in a range from 0.2 mm to 0.9 mm, from an axis of a through hole which is included in a pressurized liquid exhaust passage.

Abstract: A tenser displacing device in a two-for-one twister comprising a cylindrical housing 6 inserted into a take-up tube 5 of a yarn supply package 4 placed on a stationary disk 1 of a two-for-one twister, a lower supporting member 6 secured within the housing 6, a yarn guide pipe 9 inserted into the housing 6 and movable up and down, an upper supporting member 10 secured to the yarn guide pipe, and a tenser 7 held between the lower supporting member and the upper supporting member, wherein a cam member 14 formed in the outer periphery with a cam groove 13 in engagement with a pin 21 projected into the housing 6 is provided on the yarn guide pipe 9 urged by a spring, and the housing 6 is partly provided with a magnet 22 for attracting and holding the tenser 7 at a position displaced from a yarn running area.

Abstract: Device for continuous spinner with draft and simultaneous actual pre-twist wherein the draft motion is derived via a gear train from the pre-twist motion so as to utilize only one motion drive and wherein the thread being formed is controlled by an air stream operating around and in the feeding direction thereof; the thread moves through the apparatus advancing inside a revolving sleeve located either up-stream or down-stream of the draft unit and rotating therewith and concordantly with the thread that is being formed.

Abstract: A service device in a ring spinning machine is moved after a yarn break to the appropriate spinning position to separate the broken yarn end from the winding by generating an air blast that acts on the yarn end. If the winding build-up is in a stage in which the initial winding cone has not yet been completed, the air blast is set at a high value so that a relatively strong separating force acts on the broken yarn end. If, on the other hand, the build-up of the winding cone has been completed, the separating force acting on the yarn end is less. The stage of the winding build-up is determined with the aid of a switch, which is connected to a stop member that contacts and rests on the ring rail of the spinning position. The setting of the two air blasts is performed by a switchable trottle.

Abstract: A thread brake mechanism is provided which is adapted to be attached to a spindle assembly of a thread processing machine and which is characterized by a construction for use with two independent individual threads which may be fed into the spindle assembly at varying tensions and which applies respective braking forces to the individual threads depending upon the respective feeding tension thereof.

Abstract: A tension device for use in a two-for-one twister, in which the yarn insertion is made by means of compressed air, comprises a tubular tenser body provided with a yarn passage, a tenser disposed in the tenser body and adapted to close the yarn passage at a predetermined pressure to impart a tension to the yarn, and a tenser operating member provided on a portion of the tenser body and adapted to slide within a plane perpendicular to the yarn passage.

Abstract: A device for feeding-in a thread end through a thread draw-off channel of a thread guiding element into a spinning nip of a friction spinning device includes a pressurized-gas injection device in the thread guiding element for producing an air flow in the thread draw-off channel opposite in direction to that of a thread draw-off direction of a spinning operation in the friction spinning device, whereby a thread end is entrained thereby, the thread draw-off channel continuing along the spinning nip from a termination thereof in the thread guiding element.

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: A two-for-one twisting spindle which, in order to prevent the thread from being further drawn off through the hollow spindle shaft in the event of thread breakage, is provided in the range of the hollow spindle shaft, with a compressed air operated device to influence the thread passage. The compressed air operated device includes an element adapted to be moved into the path of travel of the thread, and a counter element opposing the movable element and cooperating therewith whereby the movable element which is adapted to be moved into the path of travel of thread is a stud to be coaxially inserted into the hollow spindle shaft from below.

Abstract: A two-for-one yarn twisting spindle assembly having no balloon limitor utilizes a ring member for receiving a generally horizontal air flow and yarn emerging from the spindle assembly during pneumatic threading and deflects the air flow and yarn generally vertically upwardly therefrom along the outside of the spindle assembly, avoiding interference with adjacent spindle assemblies without the necessity of a conventional balloon limitor, for subsequent threading operations.

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 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: A method for starting the operation of a friction spinning machine, including friction surfaces movable in opposing directions for forming a spinning wedge; the friction surfaces being movable in a spinning direction during a spinning operation, a device for supplying fiber to the spinning wedge, at least one suction device acting on the spinning wedge, a suction tube supplied with suction air, and a thread withdrawal device includes:stopping the fiber supply and the motion of the friction surfaces;stopping the suction;moving the suction tube through the spinning wedge in a given direction for sucking in thread and fiber remains;subsequently sucking a thread through the suction tube; moving the suction tube out of the spinning wedge in a direction opposite said given direction depositing the thread in the spinning wedge;resuming the suction at least as late as the step of moving the suction tube out of the spinning wedge;moving the friction surfaces in a direction opposite the spinning direction removing the

Abstract: In a pneumatically threadable yarn brake, in which a substantially capsular brake cartridge (7) abuts against an upper (8) and lower (9) brake surface ring in a brake housing, the lower brake surface ring (9) is connected to an annular diaphragm (16) which is downwardly adjustable or movable under the action of a vacuum, at the same time carrying along the lower brake surface ring (9).

Abstract: A two-for-one twisting spindle has a compressed-air-actuating device which is disposed in the region of the hollow axle (21) of the spindle (1) above the spindle rotor, and which influences the run of the yarn and to which a compressed-air passage (29), extending through a stationary part (7) of the spindle, leads, in order to prevent the yarn from being drawn through the hollow axle of the spindle in the event of breakage of the yarn. The compressed-air-actuated device is a compressed-air-cylinder (27) whose axis intersects the hollow axle of the spindle at right angles thereto and whose outer wall has two openings (25) which are located diametrically opposite one another and which are in alignment with the hollow axle of the spindle, and a piston (26) which is displaceable within the compressed-air cylinder and whose rear end is subjectable to compressed air for the purpose of clamping (FIG. 1), or cutting (FIG. 5) through the yarn.

Abstract: In a thread brake having two coaxial braking surface rings 2, 3 arranged in spaced relationship to one another and a capsule-shaped braking cartridge 7 whose hemispherical ends bear against the braking surface rings, to make it easier to thread a thread through the brake and the two braking surface rings are each provided with an axial threading slot 2', 3' so that a thread which is inserted sideways into the threading slots in the two braking surface rings can be automatically introduced between the braking surfaces in a simple and reliable manner by tightening or tensioning the thread.

Abstract: An apparatus for aiding in piecing-up wrapped yarn on a yarn wrapping device which includes a hollow spindle upon which a bobbin of wrapping thread is carried. A pair of delivery rolls feeds a fiber bundle F through a fiber feed channel 8 provided in a pot carried on top of a housing which encloses the hollow spindle and bobbin. Holes 73 are provided in the downwardly extending projections of the pot so that in normal operation air flows through the housing and out of the holes 73. However, upon piecing-up of the yarn, the pot is depressed closing the holes 73 and 61 allowing the air flow to flow at its maximum through the feed channel out of a suction duct 9. This increased suction through suction duct 9 causes the fiber bundle F, the wrapping yarn B, and wrapped yarn G to be sucked thereinto for being pieced-up.

Abstract: The invention relates to a device for pneumatically threading a yarn in a double twist spindle. It is disposed inside a sleeve connecting two tubes adapted to constitute the central shaft of a double twist spindle. A yarn brake capsule passing through the flat rod of a piston is disposed inside the sleeve, its ends abutting against the opening of the bore of one tube and against that of the central hole of an end piece mounted at the end of the other tube. When compressed air is sent into the bore of the first tube, the piston is moved, causing a lateral shift of the yarn brake capsule, thus allowing passage of the yarn along the bore of the spindle. The invention is particularly applicable to double twist spindles.

Abstract: A double twisting spindle is equipped with a pneumatically operated threading device. An injector nozzle is provided in the spindle rotor, an air stream through which nozzle sucks a thread into a hollow spindle axle and moves the thread through a thread channel in the storage plate. A compressed-air supply device is arranged below the spindle rotor for supplying compressed air to a central connecting channel provided in the spindle rotor and in communication with the injector nozzle. A common operating lever is provided which first operates a spindle brake and then opens a valve of the compressed-air supply device. The connecting channel has at its open lower end a funnel-shaped enlargement.

Abstract: A double twister provided with a pneumatic yarn guide means and tension regulating means including a hollow yarn guide tube inserted slidably in a central hole of a yarn supply bobbin of the double twister, a first spring for urging upward the hollow yarn guide tube and a second spring which is wound on the upper end of the yarn guide tube and may bring a flyer boss supporting member into pressing contact with a brake disc.

Abstract: A yarn texturizing machine in which there are provided a plurality of treatment positions, each position presenting, in operational sequence, a yarn supply device, a first yarn feeder, a yarn heating device, a cooling zone for the heated yarn, a false twist spindle, a second yarn feeder and a windup device. This machine is presenting a central frame on either side of which are symetrically arranged the working positions. A guide tube for the yarn is arranged between the first delivery device and the heater entry, the connection between this tube with the heater being realized by means of a connecting element also joined to a blowing source permitting to eliminate the fumes inside the heater. The connecting element comprises means to the stop of the blowing during the yarn launching operation and to the automatic starting of the blowing action when running normally.

Abstract: A deflector for twisting double twisting spindles with pneumatic threading of the filament and with prepositioning of the rotating part of the spindle during the threading phase. Substantially between the circumference described by the wall containing the outlet port of the filament of the rotating part and the peripheral rim of the rotating plate is arranged at least temporarily an angular deflector in cooperation with the neighborhood of the radial plane in which is disposed the outlet of the filament in the rotating part cooperating through its extension with the neighborhood of the tangent to the curved rim of the rotating plate.

Abstract: A pair of draw-off rollers (10, 11) of a thread drawing-off device comprising an over-mounted pressure roller (11) which cooperates resiliently with a driven roller (10) which projects across the front of the pressure roller (11). The pressure roller (11) has at least one recess (113, 114) on its front face (110) which is dimensioned in such a way that it temporarily completely releases a thread (4) sliding along the surface of the driven roller (10) and lying adjacent to the front (110) of the pressure roller (11). By means of a device of this type, the thread (4) is drawn off, for the purposes of joining, to such an extent from the spool (31) that the thread (4) reaches the side (310) of the spool (31) which is facing away from the front (110) of the pressure roller (11) provided with recesses (113, 114). The thread is then introduced into the spinning chamber (2) and is joined.

Abstract: A pneumatic yarn guiding apparatus for a double twisting machine, two-for-one twister. A yarn passage of the double twisting machine is formed by a yarn guide tube vertically movable inserted in the tension device mounted in the center of a yarn supply bobbin, a yarn guide hole formed in the center of a stationary disc through the center of the spindle, a yarn guide tube formed in the radial direction of a yarn store disc, a yarn passing space formed between a rotary disc secured to the spindle and an outer ring, and a vertical space between the outer cylinder of the stationary disc and balloon restricting cylinder.