Abstract: A false twisting device with three spindles and a plurality of friction discs wherein it is driven by means of individual motor so as to decrease generation of noise, adjustment of false twisting condition can be done for individual work stations, and maintenance service or replacement of spindles of the friction false twisting device can be done easily.

Abstract: A yarn false twisting apparatus which comprises a drive motor and a yarn false twist assembly, both mounted on a base frame. The yarn false twist assembly comprises a plurality of spindles mounting friction disks which are rotated in the same direction by the motor, and the assembly is releasably mounted to the base frame so it can be separated from the base frame by withdrawing the assembly in an axial direction. The drive motor has a drive pulley, and at least one of the spindles has a belt pulley, which can be interconnected via a drive belt. The drive belt is arranged in a drawer-like housing, which is displaceable in the operating plane of the drive belt. At its free end, the belt pulley mounts a cone, which ensures that the drive belt slides onto the belt pulley when mounting the false twist assembly to the base frame.

Abstract: A linear course of thread is required for a high speed friction false-twisting unit. For this purpose, the region of travel of the thread through the center of a three spindle disk set triangle should be freely accessible. One of the disk sets is adapted to be swung out on a lever from the other two disk sets. A toothed belt drive is used both in the case of a tangential belt drive and in units driven by an electric motor. A further advantage is that this arrangement can be used in units which have the possibility of a change of the center-to-center distance. The belts from driving rollers which drive the disk set spindles are held outside the center of the disk triangle through which the thread passes.

Abstract: A cable stranding apparatus is described as having a plurality of stranding rotor units that are interchangeably coupled, in a locked manner, to a single rotor drive assembly of such apparatus. Each stranding rotor unit is designed to accommodate the dimensions of particular cable elements to be stranded. For this purpose, the stranding rotor unit for cable elements of a large cross-section has a plurality of large collets for accommodating the drawing of such large cable elements through the unit; while the cable stranding rotor unit for cable elements of a small cross-section has a plurality of smaller collets for drawing the smaller cable elements through such unit.

Abstract: A friction false twisting unit having three spindles and respective plurality of disks on each spindle. One spindle and its disks are on a swingable housing which swings out with respect to a stationary housing holding the other two spindles. A lower thread guide is beneath the lowest disk on the first spindle on the swingable housing. The lower thread guide eyelet opening opens toward the front spindle on the stationary housing. The lowest disk on that spindle is a thread guide disk, not a texturing disk. An upper stationary thread guide above the disks has an eyelet opening toward the rear of the housing and toward a respective lateral side of the housing depending upon whether an S twist or a Z twist is being applied to the thread, and the center of the eyelet opening of the upper thread guide is off the center of the triangle defined by the spindles.

Abstract: A false twisting roll for imparting false twist to an advancing yarn of manmade fibers is disclosed. The roll has a generally conical and somewhat concave surface configuration, and the angle of inclination of the roll axis is adjustable with respect to the yarn path leading into contact with the roll. To insure optimal twisting conditions at all adjustable inclinations of the roll, the position of the pivotal axis of the roll, and the shape of the surface of the roll are adapted to each other so that the yarn path leading into contact with the roll is predetermined and remains constant. This in turn assures that the upstream twisting conditions of the yarn are unchanged.

Abstract: A belt type false twisting device for a pneumatic spinning apparatus in which a fiber bundle is nipped between a pair of endless belts running in an intersecting relationship in mutually different directions to impart false twists to the fiber bundle. A pulley around which each of the endless belts extends is supported for rocking motion around a support shaft.

Abstract: A spinning apparatus comprising a drafting device, an air jet nozzle and a false twisting unit including a pair of endless belts lying in surface contact with each other at a yarn nip point, the drafting device, air jet nozzle, and false twisting unit being located in a path of yarn travel in the order named, the air jet nozzle and the false twisting unit being both movable away from the path of yarn travel, the air jet nozzle and the false twisting unit being movable to and away from each other.

Abstract: The device according to the invention enables a false twist to be communicated to a fibrous material. The device includes two endless belts or aprons inclined with respect to each other and mounted on two pairs of rollers. According to the invention, the support rollers supporting the two aprons are mounted on the casing proper of the spindle via two support arms, one of the support arms of each pair being subjected to the action of pressure for ensuring tension of each apron and at least one of the other two support arms being mounted in articulated manner on the casing. Parallelism between the axes of the rollers is not able to be respected.

Abstract: A new combination of an integrally-formed button, thread, and needle to eliminate the need for assembling these items. In the present invention, they are preassembled and ready for immediate use by the sewer.

Abstract: A false twist apparatus, for processing primarily fine denier yarns at low level twist levels with consistency and good process control, comprises a roller mounted for rotation about its longitudinal axis and input and output guides, to guide the yarn in a helical path around the roller, mounted on a guide support extending adjacent the roller. One of the guides is positionally adjustable on the support in a direction parallel with the roller axis to alter the helix angle of the yarn around the roller and the twist level. For S and Z twist, two drive spindles are provided symmetrically disposed on opposed sides of the support, the roller being secured on the appropriate spindle and the output guide being moved to the appropriate side of the support.

Abstract: Apparatus for false twisting yarns is of the type comprising three rotatable shafts, each shaft having a plurality of discs thereon. The shafts are mounted on a base member and two shafts are pivotal about axes which with the axis of the third shaft are at the apices of an equilateral triangle. The third shaft, and spindles providing pivots for the movable arms which carry the other shafts, each have a respective first drive pulley thereon and a primary drive belt passes around the three pulleys. The spindles each also have second drive pulley thereon and each movable shaft has a third drive pulley thereon, a second drive belt passing around each respective pair of second and third drive pulleys. A cam mounted on the third shaft has two like operating portions into contact with which a respective follower part of each movable shaft is biassed. Movement of the shafts may be made without alteration of the tension in, or reverse bending of, the belts.

Abstract: A yarn twisting apparatus is disclosed wherein a single endless belt is entrained upon first and second roller means. At least one of the roller means is rotatably driven, so that the belt segments which extend between the roller means cross in opposing face-to-face relation at a location between the roller means and so as to define a twisting zone therebetween, and a running yarn is guided through the twisting zone so as to have twist imparted thereto. In a preferred embodiment, one of the roller means comprises a pair of individual rollers which are selectively movable to permit adjustment of their lateral separation, and which in turn permits adjustment of the crossing angle of the belt segments and thus the amount of twist imparted to the running yarn.

Abstract: A twist generator for a running fiber aggregate possesses two friction discs rotating in opposite directions and having end faces turned towards one another for the twisting of the fiber aggregate running between the friction discs. One friction disc is made flexible and is pressed by pressure rollers towards the end face of the other friction disc and consequently against the fiber aggregate. To allow defined conditions to be obtained as regards pressing force, there are two pressure rollers, of which one is arranged shortly before and the other shortly after the thread contact point of the friction discs in the direction of movement of the flexible friction disc. The two pressure rollers are mounted next to one another, but preferably offset in the direction of movement of the fiber aggregate, on a carrier which is pivotably fastened to a spring-loaded lever. The distribution of the pressing force to the two pressure rollers can be changed by adjusting the carrier relative to this lever.

Abstract: In a friction false-twisting unit including three parallel spindles supported on a mount and each spindle carrying a stack of friction disks and the friction disks of the various spindles being interleaved, the thread to be threaded into the unit passing from an upper thread guide above the ends of the spindles, over a thread guide arm which holds the thread away from contact with the disks, and to a feeder system below the other end of the spindles. A support lever is movable between an operative position which holds the drive whorl for the spindles in contact with an operating belt and an inoperative position at which the spindle mount is moved to separate the drive whorl from the belt. The thread guide arm is on the support lever to be moved to the position holding the thread away from the disk when the support lever is moved to the inoperative position of the unit.

Abstract: A yarn false twisting apparatus is disclosed which comprises a pair of rotating circular discs having cooperating friction surfaces for engaging a running yarn at a twisting zone. The drive system for the discs includes a drive component which includes a drive whorl and a coaxial drive pulley, and which is adapted to engage two separate drive belts. The drive component includes a unitary tubular drive member, a central shaft extending through and fixed to the drive member, a sleeve mounted to the frame of the apparatus and extending between the shaft and drive member, and bearings positioned between the shaft and sleeve. Also, the drive component is mounted to the frame by an arrangement which permits adjustment of the rotational axis of the drive whorl about a second axis which perpendicularly intersects the rotational axis, so as to permit accurate alignment of the rotational axis of the whorl along a direction perpendicular to the running direction of the tangential drive belt.

Abstract: Two complete friction false-twisting units are disposed within a very narrow space on only a single base plate. Only one pivot mount is provided for the base plate, whereby the drive whorls of each of the two units can be pivoted toward and away from the drive belt. The capacity of a thread texturing machine can be doubled thereby.

Abstract: Apparatus for twisting a running yarn in a textile machine comprises first and second pulleys mounted for rotation about parallel axes and an endless belt passing around their aligned peripheries so as to provide two runs each of which is twisted through 180.degree. and crosses the other run to form a nip region therewith through which the yarn is guided by yarn guides. One pulley, which may be of larger diameter than the other driven pulley, is mounted on a pivoted arm to tension the belt and/or allow for the use of differing sized belts or differing sized pulleys to alter the crossing angle of the belt and the twist level applied to the yarn.

Abstract: A yarn false twisting apparatus is disclosed which comprises a pair of rotating circular discs having cooperating friction surfaces for engaging a running yarn at a twisting zone. A pressure applying member is positioned to apply a biasing force to the rear surface of one of the discs locally at the twisting zone, and the pressure applying member comprises a receptacle slideably mounting a piston which extends from the end of the receptacle to engage the disc. The receptacle is eccentrically mounted to permit selective positioning of the biasing force with respect to the yarn path of travel. The discs are mounted on pivotal rocking arms whereby the ratio of yarn twist to yarn speed may be adjusted, and an eccentrically mounted pin provides closely controlled adjustability for the arms and thus the twist ratio.

Abstract: A yarn false twisting method and apparatus is disclosed, and which includes a pair of oppositely rotating friction discs which are mounted with opposing faces to define a twisting zone therebetween. The yarn is advanced through the twisting zone to impart twist to the yarn in one direction, and the advancing yarn is deflected downstream of the discs so that the yarn is brought into frictional contact with the peripheral edge of one of the discs, to thereby impart an opposite twist to the yarn. The invention is useful in that it permits increased running speed and twist level, and the resulting yarn may be characterized by reduced instances of "tight spots" and less fuzziness resulting from filament breaks.

Abstract: A yarn false twisting apparatus is disclosed which comprises a pair of rotating circular discs having cooperating friction surfaces for engaging a running yarn at a twisting zone. The drive system for the discs includes a drive component which includes a drive whorl and a coaxial drive pulley, and which is adapted to engage two separate drive belts. The drive component includes a unitary tubular drive member, a central shaft extending through and fixed to the drive member, a sleeve mounted to the frame of the apparatus and extending between the shaft and drive member, and bearings positioned between the shaft and sleeve. Also, the drive component is mounted to the frame by an arrangement which permits adjustment of the rotational axis of the drive whorl about a second axis which perpendicularly intersects the rotational axis, so as to permit accurate alignment of the rotational axis of the whorl along a direction perpendicular to the running direction of the tangential drive belt.

Abstract: A yarn false twisting apparatus is disclosed which comprises a flexible disc mounted for rotation with a cooperating rigid disc to define a twisting zone therebetween. A pressure applying member is positioned adjacent the back face of the flexible disc for biasing the disc toward the rigid disc locally at the twisting zone so as to firmly engage the yarn passing through the twisting zone. The flexible disc comprises a hub portion disposed adjacent the center of the disc, an annular ring disposed concentrically about the hub portion and including a yarn engaging friction surface on one face thereof, and a distinct and highly flexible junction portion joining the hub portion and annular ring. The highly flexible junction portion permits the annular ring to readily flex in the lateral direction, to thereby permit the deflecting force to be minimized, while still permitting the rotating torque to be transmitted to the annular ring without significant circumferential deformation.

Abstract: A method and apparatus for twisting a yarn, such as a sliver of staple fibers, is disclosed, and wherein the yarn is advanced through a drafting zone and then through a twisting apparatus. The twisting apparatus includes two circular discs, with at least one of the discs being flexible. Also, in the preferred embodiment, two separate pressure applying members are mounted adjacent the back surface of the flexible disc, with the members being positioned on opposite sides of the plane defined by the axes of rotation of the discs. The two pressure applying members are adapted to be actuated concurrently, with one member defining a first twisting zone wherein S twist is imparted to the advancing yarn, and the other member defines a second twisting zone wherein Z twist is imparted. Means are also provided for controlling the degree of twist imparted at each of the zones, so as to obtain, for example, a twisted yarn composed of core fibers having minimal twist and which are bound by outer fibers of greater twist.

Abstract: A false-twist apparatus has three parallel shafts carrying interleaved sets of friction disks interconnected by drive belts for joint rotation; one of these shafts is journaled in a stationary mounting plate while the others are journaled in a carrier pivotally connected with that plate for swinging about a fulcrum offset from the three shaft axes whereby two of the disk sets can be separated to facilitate the introduction of a yarn into the intervening twisting region. A whorl on the carrier-supported shaft nearest the fulcrum is normally driven by frictional contact with a continuously moving tangential belt but is disengaged from that belt in the swung-out position of the carrier so that the disks are arrested during introduction of the yarn.

Abstract: A yarn false twisting apparatus is disclosed which has a control system which is designed to insure that the machine operator will properly complete the yarn thread-up procedure, and which also effectively precludes damage to the twisting apparatus if the thread-up procedure is not properly completed. The twisting apparatus includes a pair of yarn twist imparting members having cooperating friction surfaces for engaging a running yarn, a drive whorl which is operatively connected to the twist imparting members, and a pivotally mounted control arm which is connected to the drive whorl and which is pivotable between an operative position wherein the whorl engages a drive belt, and an inoperative position wherein the whorl is disengaged from the drive belt.

Abstract: A false twist device has a pair of fixedly positioned spindles whose whorls are driven by a tangential belt and whose friction discs overlap wtih each other and with the friction discs of a swingable spindle mounted on an arm which can be angularly displaced about a pivot axis parallel to the spindle axis but spaced outwardly from the triangle defined by the axes of the spindles.

Abstract: The invention is concerned with a textile spinning machine particularly a ring spinning machine, and is directed to the provision of a tension reliever between the delivery rollers and the yarn balloon, which has the effect of producing a tension differential between the yarn forming the balloon, and the yarn travelling from the delivery rollers to the tension reliever. In order to facilitate piecing-up of the yarn after a breakage, the tension reliever has a drive wharf and a capstan device which includes a yarn engaging capstan element, the capstan device permitting threading in a radial direction, and having a snap-in connection with the wharf, so that the capstan device can be completely detached from the drive wharf for a piecing-up operation.

Abstract: A yarn false twisting apparatus is disclosed which comprises a pair of circular discs which are mounted for rotation about spaced apart axes, and such that portions of the surfaces are disposed in opposing face to face relation and define a twisting zone therebetween. In the operative position, one disc is resiliently deflected from its normal plane of rotation at the twisting zone by its engagement with the friction surface of the other disc, or a yarn passing therebetween, to thereby effectively engage and impart twist to the yarn. The bearing housings for the supporting shafts of the discs are held against movement with respect to each other during the twisting operation, and means are provided for automatically separating the housings and thus the discs in the event of a yarn breakage, to thereby avoid wear of the opposing disc surfaces.

Abstract: A yarn false twisting apparatus is disclosed which includes a pair of twist imparting discs, with the discs being mounted for rotation so that portions of the disc surfaces are disposed in opposing, substantially non-contacting relationship and define a twisting zone therebetween. The discs rotate in a common rotational direction, and a yarn is continuously advanced through the twisting zone in a direction parallel to a line extending perpendicularly between the axes of rotation of the two discs. In one embodiment, one of the discs is relatively thin and flexible, and there is further provided a pressure applying member which acts to locally bias the flexible disc toward the other disc at the twisting zone.

Abstract: A yarn false twisting apparatus is disclosed which comprises a pair of circular discs which are mounted for rotation about generally parallel spaced apart axes, and such that portions of the surfaces are disposed in opposing face to face relation and define a twisting zone therebetween. In one embodiment, one of the discs is relatively thin and flexible, and such disc is resiliently biased toward the other disc only at the twisting zone. In other embodiments, both discs are relatively inflexible or rigid, and one disc is mounted to its supporting shaft by a gimbal-like interconnection and such disc is resiliently biased toward the other disc only at the twisting zone.

Abstract: A method and apparatus of false twisting a yarn is disclosed which utilizes a pair of endless belts mounted in crossing relation to define a twisting zone therebetween, and a pressure applying member for locally biasing at least one of the belts toward the other at the twisting zone. The yarn is advanced along a path of travel through the twisting zone, and the acute angle formed between each belt and the yarn path of travel is adjusted so as to generally correspond to the desired twist angle of the yarn in its twisted condition. Further, the speed of each belt is adjusted so as to optimize the yarn tension conditions both preceding and following the belts. To achieve an essentially slipless operation, the pressure exerted by the biasing means is adjustably controlled so that the torque exerted by the belts exceeds the natural restoring torque of the yarn.

Abstract: A yarn false twisting apparatus is provided which includes a pair of twist imparting circular discs, with one of the discs being thin and flexible. A pressure applying member is positioned to upset the flexible disc toward the other disc at the twisting zone. In order to avoid undesired deformations of the flexible disc, the flexible disc includes reinforcing means, such as embedded reinforcing fibers, a reinforcing sheet, a discrete annular ring embedded in the material of the disc, or combinations thereof.

Abstract: A yarn false twisting apparatus and method is provided which permits ready conversation from S to Z twist, or vice versa. The apparatus comprises a pair of friction discs which are rotatably mounted on a common carrier plate, and the discs are rotated in opposite directions by a drive system which includes a whorl mounted to each supporting shaft, and an endless drive belt having a run which engages opposite sides of the two whorls. The carrier plate is designed to permit the respective positions of the two discs to be reversed, and the direction of rotation of each disc to be reversed, to thereby convert from S to Z twist, or vice versa. In other embodiments, conversion between S and Z twist may be effected by the axial displacement of the two discs, or by the use of the two pressure applying members which define two separate twisting zones and which are alternately actuated.

Abstract: A yarn false twisting apparatus is disclosed which comprises a pair of cooperating friction discs which define a twisting zone between opposed friction surfaces thereof. One of the discs is composed of a thin flexible material, and a pressure applying member is mounted adjacent the back side of the flexible disc for biasing the disc toward the other disc locally at the twisting zone to firmly engage the yarn passing therethrough. The discs are movable with respect to the pressure applying member such that the ratio of twist insertion to yarn speed may be varied. In one illustrated embodiment, the discs are mounted so as to permit selective placement on opposite sides of the pressure applying member and reversal of their direction of rotation, and such that either S twist or Z twist may be imparted, without changing the direction or location of the yarn advance.

Abstract: A yarn false twisting apparatus and method is provided which permits ready conversion from S to Z twist, or vice versa. The apparatus comprises a pair of friction discs which are rotatably mounted on a common carrier plate, and the carrier plate is pivotally mounted to the frame of the apparatus such that the discs may be selectively rotated between first and second operative positions disposed 180 degrees from each other. The discs are rotated in a common rotational direction in each operative position, and the yarn is advanced through a twisting zone between the discs in a direction parallel to a line extending perpendicularly between the axes of rotation of the discs. Thus conversion from S to Z twist, or vice versa, may be effected by pivoting the carrier plate between the two operative positions, without changing the direction of rotation of the discs or the yarn path of travel.

Abstract: A yarn false twisting apparatus and method is disclosed which comprises a pair of friction discs, with one of the discs being thin and flexible, and a pressure applying member for biasing the flexible disc toward the other disc locally at the twisting zone. The discs and pressure applying member are mounted to permit selective movement whereby the ratio of twist to yarn speed may be varied, and to achieve a desired twist in the advancing yarn. The biasing force of the pressure applying member is also adjustable, to achieve an essentially slipless operation by assuring that the torque exerted by the discs exceeds the natural restoring torque of the yarn.

Abstract: An apparatus for false twisting a yarn is provided which comprises, in one embodiment, a pair of endless belts mounted for rotation to define a twisting zone between opposing friction surfaces thereof. A pressure applying member is mounted adjacent the back side of each belt for biasing the belts toward each other locally at the twisting zone so as to firmly engage the yarn passing through the twisting zone and while the friction surfaces remain in substantially non-contacting relationship with respect to each other. The pressure applying member preferably utilizes an air cushion between the member and back side of the belt to minimize friction. In another embodiment, the apparatus comprises an endless belt in association with a disc mounted for rotation about an axis disposed perpendicular to the runs of the belt, and in a further embodiment, the endless belt is associated with a roller mounted adjacent the runs of the belt.

Abstract: A drive system for a yarn false twisting apparatus is disclosed which may be readily converted to produce either S or Z twist, and which insures adequate tension of the drive belt. The apparatus comprises a pair of twist imparting members, and a drive belt system for rotating the twist imparting members which comprises a drive whorl positioned to engage a tangential belt, and a series of pulleys having a drive belt entrained thereabout for rotatably interconnecting the whorl and twist imparting members. The whorl and one of the pulleys are mounted coaxially on a whorl support member, which may be selectively positioned in one of two operating positions to place the whorl on opposite sides of the tangential belt. Another of the pulleys is an idler pulley, which is adjustably mounted for movement in a direction perpendicular to the yarn path of travel and so as to permit maintenance of an adequate tension on the drive belt.

Abstract: A yarn false twisting apparatus is disclosed which comprises a pair of circular discs which are mounted for rotation about generally parallel spaced apart axes, and such that portions of the surfaces are disposed in opposing face to face relation and define a twisting zone therebetween. One disc is mounted to its supporting shaft by means of an elastomeric body member, which permits the disc to resiliently incline with respect to the axis of the shaft. A pressure applying member acts upon the back side of such disc to resiliently bias the same toward the other disc at the twisting zone.

Abstract: A yarn false twisting apparatus is disclosed which comprises a support bracket which mounts a pair of twist imparting circular discs, and drive means including a whorl rotatably mounted to the support bracket so as to be tangentially contacted by a drive belt mounted to the central frame of a twisting machine. The support bracket is mounted to the central frame for pivotal movement through 180 degrees to thereby permit selective operation in a first position wherein S twist is imparted to the yarn, and a second position wherein Z twist is imparted to the yarn. Preferably, one of the discs is composed of a thin flexible material, and a pressure applying member is mounted on the support bracket for biasing the flexible disc toward the other disc locally at the twisting zone.

Abstract: An apparatus for false twisting a yarn is provided which comprises, in one embodiment, a thin pliable disc mounted for rotation with a cooperating disc or roller to define a twisting zone between opposing friction surfaces thereof. A pressure applying member is mounted adjacent the back face of the pliable disc for biasing the disc toward the other member locally at the twisting zone so as to firmly engage the yarn passing through the twisting zone and while the friction surfaces remain in substantially non-contacting relationship with respect to each other. The pressure applying member utilizes an air cushion between the member and back face of the disc to minimize friction. Where two discs are employed, they may be mounted for rotation in a common direction, and such that the yarn may be guided through the twisting zone without passing between the axes of rotation of the discs.

Abstract: A yarn friction false twist apparatus is provided which comprises three sets of friction discs mounted on rotatable spindles in a triangular arrangement, and which includes a plurality of yarn deflecting arms for moving the yarn from an inoperative laterally spaced position where thread-up may be effected, to an operative path of travel disposed centrally between the sets of discs and wherein twist is imparted to the yarn by contact with the rotating discs. The yarn deflecting arms are mounted on a pivotally mounted door which also serves to protectively cover the sets of discs during operation. Each of the yarn deflecting arms has an open yarn guide at the forward free end thereof, with the length of the arm being such that the guide is free of contact with the yarn during the twisting operation.

Abstract: False twisting method and apparatus of nipping type for producing crimped filament yarns, comprising two flat endless belts supported, under tension, on two pairs of pulleys, respectively, so as to run in different directions relative to each other and having work surfaces of a relatively small friction coefficient and straightly extending regions defined between their mating supporting pulleys and crossing each other at a selected angle to provide a crossing zone, while being urged, with a desired pressure of contact, against each other at this crossing zone for positively nipping thereat a filament yarn to thereby twist this filament yarn, while urging this filament yarn to advance progressively from the crossing zone.

Abstract: A friction false twist device is of the type comprising three parallel shafts located at the corners of an equilateral triangle, and carrying rotationally symmetric friction elements. At least one of the shafts can be shifted in relation to the other shaft or shafts so as to open the device for threading. An additional shaft is arranged in relation to the three shafts carrying the friction elements so that, if connected by a line, the centers of the four shafts preferably would lie at the corners of a generally kite-shaped quadrilateral. Each of the four shafts carrys a whorl, the four whorls being drivingly interconnected by an endless belt of relatively minimum elasticity. At least one other shaft is coupled with said shiftable shaft for conjoint movement such that changes in the circumferential length of the quadrilateral caused by movement of the shiftably mounted shaft are substantially compensated by conjoint movement of the coupled shaft.

Abstract: The supplied strand is provided with a permanent twist due to the rotating balloon and a superimposed false twist due to a false twist device prior to winding onto the bobbin package. Prior to winding on the package, the false twist is eliminated so that the resultant roving has relatively high breaking strength for handling purposes while remaining draftable.The false twist device is located between the delivery rolls and spindle to rotate coaxially around the spindle and may be driven by the balloon or by a positive drive.

Abstract: This invention relates to a method and apparatus for imparting false twists to two yarns simultaneously. The significance of the invention resides in that an industrially utilizable method for false twisting yarns by frictional contact of two yarns with 4 rotating frictional discs has been provided. The apparatus of the present invention for practising the false twisting method is characterized in that the angle of contact of yarns with the frictional discs is maintained within a specific range and the frictional discs are attached to four shafts in specific order at specific heights. Various processes for preparing a variety of false twist yarns by utilizing the false twisting method and apparatus of the present invention have been established.

Abstract: In a false twist or friction twist texturing machine of the type wherein a plurality of rotatably mounted spindles each carry a plurality of friction discs which overlap and through which a thread is passed along a zig-zag path between the spindles and over the edges of the friction discs, the friction disc assemblies are improved to the extent that they are formed of a circular base member extending outwardly from an arbor which is then mounted on one of the spindles. Such base members include an inwardly extending peripheral groove and a separate, ring-shaped friction member formed of a resilient material having a relatively high coefficent of friction and formed of such size and shape as to be releasably snap-fit into the groove, whereby when worn out the ring is replaced and the base member reused.

Abstract: A yarn friction false twist arrangement which includes a base plate having arranged thereon at least three equiangularly spaced shafts, each of which is provided with a plurality of axially spaced friction disks. The disks are arranged on the respective shafts and the base plate in an overlapping manner so as to define a path of travel for a strand of yarn. One of the shafts is fixedly connected with respect to the base plate and the other shafts are mounted so as to be displaceable with respect to the base plate with a device being provided for adjusting a position of one of the displaceably mounted shafts. An arrangement is provided at the base plate for securing the adjusting device in an adjusted position with a locking construction being provided for locking the adjusting device at the base plate.