Abstract: A device for treating at least one running multifilament yarn with compressed air contains one continuous yarn channel (13, 14, 15) which is circular in cross section. Into a cylindrical middle section (14) of the yarn channel (13, 14, 15) three blowing medium feed holes (16, 17) empty. The axes of these blowing medium feed holes (16, 17)intersect the axis of the yarn channel (13, 14, 15) at one common point each at an angle of 15.degree. to 40.degree.. With this device it is possible to treat multifilament yarn (M1) which is supplied to the yarn channel (13, 14, 15) with an excess delivery of 0 to 15% and which is discharged, transversely to the axis of the yarn channel (13, 14, 15), from the device such that the filaments of yarn are uniformly intertwined with one another over the length of the yarn and thus no protruding loops are formed.

Abstract: An apparatus and method for the manufacture of a mixed yarn consisting of two components, continuous filament yarn and staple fibers. The mixed yarn is manufactured by an air jet texturing process. It has been possible to bind the staple fibers undisplaceably into the yarn, and this is ensured by the loops on the continuous filaments produced during texturing. Owing to the formation of a suction zone of the airstream directly before the beginning of actual texturing, the staple fibers can be sucked in and can be blended into the interior of the yarn and can be secured firmly in the yarn by the loops. The invention relates to a new method of manufacture and to an apparatus, or an entire machine, with which the known loop yarn or the new mixed yarn can now be manufactured selectively.

Abstract: The device has a guide body (1) with a through bore, which exhibits an outlet opening (3). A needle body contains a through yarn channel, which is coaxially aligned with the bore of guide body (1). One end of the needle body extends into a conical inlet section of the guide body bore and forms, with it, a passage gap for the blowing air. The blowing air is introduced by two feed bores (11, 12) into the annular space in front of the passage gap. An impact body (9) is placed in the area of outlet opening (3).

Abstract: The device comprises a body (1, 2) with a continuous yarn channel into which terminate a blast nozzle (7) and a threading slot (8). The yarn channel is defined by two hollow wall surfaces (11.1, 11.2 and 12.1, 12.3) emanating from respectively one rim of the orifice of the threading slot (8) and being symmetrical with respect to a plane of symmetry (E) containing the axis (A) of the yarn channel. The two wall surfaces contain jointly at least four component surfaces (11.1, 11.2, 11.3, 12.1, 12.2, 12.3) of which at least two (11.1, 11.2, 12.1, 12.2, 12.3) are planar. The rim of the orifice of the threading slot (8) lying on the side of the blast nozzle (7) has a larger spacing from the plane of symmetry (E) than the other rim. Thread guides (13) are inserted in the body (1, 2) at both ends of the yarn channel, keeping the multifilament yarn to be air-bulked at a distance from the orifice of the blast nozzle (7).

Abstract: The device has a guide unit (1) enclosing a through hole with a conical inlet section (2). A needle unit (3) encloses a through yarn passage (4) arranged coaxially with the hole in the guide unit (1). One end of the needle unit (3) extends into the conical inlet section (2) and has a conical peripheral area (5) which, with the wall of the inlet section (2), forms a slot (6) for a blowing agent. The blowing agent is fed through a drilling (17) opening into the annular space (18) surrounding the needle unit (3) are pressed together by an elastic load, e.g. springs (11, 12). This arrangement accurately fixes the axial position of the guide unit (1) in relation to the needle unit (3), while the width of the slot (6) is accurately predetermined and unchangeable.

Abstract: The air nozzle has a continuous yarn channel (3.1) into which terminate laterally an air feed bore (5) and a threading slot (4). The wall of the yarn channel (3.1) contains two cylindrical, for example circular-cylindrical wall sections, namely a baffle wall section (6.1) lying in opposition to the air feed bore (5) and a nozzle wall section (9.1) proximate to the air feed bore (5). The threading slot (4) terminates between the baffle wall section (6.1) and the nozzle wall section (9.1). The tangential plane (T) on the baffle wall section (6.1) at the rim (7) of the orifice of the threading slot (4) passes through the nozzle wall section (9.1). As a result thereof, the portion of the air stream exiting from the air feed bore (5) which is deflected by the baffle wall section (6.1) toward the orifice rim (7) of the threading slot (4), and then leaves the baffle wall section (6.1) in the direction of the tangential plane (T), does not enter into the threading slot (4).

Abstract: A texturing device consists of nozzle (1) with a guide duct (2) and a radial bore for feeding a pressure medium terminating in the guide duct. The duct is outwardly flared with a convexly curved outlet opening (2'), and a spherical or semispherical guide element (5) extending into the outlet opening and forming therewith an annular gap (4). The outer diameter of the outlet opening (2') corresponds to at least four times the diameter of the duct (2) and to at least 0.5 times the diameter of the guide element (5).

Abstract: Textile yarn is led through the front face of a die 11, which is located on a moistening device 8, before being fed to the texturing jet 15. The die is fed from a pipe 7 leading from a moisture tank 1 and has an outlet aperture on its front face at the termination of an internal bore. The quantity of fluid fed to the tank 1 is so adjusted by means of a flow regulator 5, that a fluid level h is maintained in the tank, which corresponds to a throughput of fluid through the bore of the die 11 which is matched to the titre and the rate of flow of the yarn.

Abstract: The yarn cooling apparatus comprises an inner tube through which passes a liquid coolant, e.g. water, and in which there is disposed a coaxial cylinder having a spiral peripheral groove of wedge-shaped cross-section along which the yarn travels. Provided at the yarn outlet end of the coolant tube is a supporting member which has a fixed part with a groove of U-shaped cross-section through which the yarn travels and which extends in the direction of the axis of the coolant-carrying tube, and a movable part provided with air and coolant passages arranged to cover and uncover the groove, according to its position.

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: A device for cooling heated textile yarns derived from thermoplastic material includes a cylindrical cooling pipe (1) through which the yarn (2) is passed, the pipe (1) being filled with a cooling fluid and having a curved plate (3) inside it which covers the entire length of the pipe (1). A coaxial jacket (5) encloses the pipe and defines an annular cooling zone between the pipe and jacket. At the exit end of the pipe (1) is located a removable sealing plug which has an inlet and outlet for cooling fluid, and an air inlet. Cooling fluid and cooling air can pass into the pipe (1) via the sealing plug and circulate in the pipe and the annular zone so as to cause rapid cooling of the yarn.

Abstract: Apparatus for heat-treating textile yarn includes a heater tube (3) through which the yarn is passed, the tube (3) having a holder (2) at each end and a seal in the form of a stopper (5) fitted into a neck (4). The stopper (5) has a groove (10) on its outer surface for guiding the yarn through the heater tube (3). Steam is introduced at the yarn entry end of the heater tube (3), passes over the groove (10) and is removed via passages (11) in the stopper and a suction pipe (7) connected to the passages. The heater tube (3), suction tube (7) and steam supply tube (8) are surrounded by an insulating housing (1) to minimize heat losses.

Abstract: Devices are described for determining the helix angle of twisted threads during false-twist texturing. The thread passes over a convex spherical surface at the top of a two-armed lever pivoted between the arms and having a vertical zero position. Magnetic means act on the lower arm to bias the lever to the zero position. In one device the lever is pivoted about a diameter of a vertical cylindrical tube rotatable on a second vertical tube, a scale being provided to indicate the position of the tube about its axis which, in turn, depends on the helix angle of the thread traversing the spherical surface, which has a radius of curvature equivalent to the length of the upper lever arm. In another device the two-armed lever is carried by a ball in a spherical bearing and has a pointer at the lower end that indicates the position of the lever with respect to polar co-ordinates on a flat surface.

Abstract: Friction false-twisters for textile yarn are described in which the yarn passes sinuously and in zig-zag fashion past the edges of overlapping circular rotating members distributed between and fixed to three parallel rotating shafts having their axes parallel and located, in plan view, at the corners of an equilateral triangle. The intermediate members are simple rotary discs but the member that receives the yarn and that from which it is withdrawn are hemispheres or hemiellipsoids respectively on two of the shafts, or both on the same shaft, and facing in opposite directions. The yarn is fed perpendicular to the shaft axis to the convex end of one hemisphere and withdrawn from the convex end of the other hemisphere either perpendicular to or at an angle between 50.degree. and 80.degree. to the shaft axis. All three shafts rotate at the same speed in the same sense.

Abstract: Apparatus for friction false-twisting synthetic filaments is described wherein the yarn travels over coaxial hemispherical surfaces inverted with respect to each other and having a gap between them into which projects the edge of a disc. Parallel shafts, respectively carrying an element formed with the surfaces and the disc are carried by a bearing unit beneath which the shafts carry rollers with a driving belt travelling between them. To economize in machine space the bearing unit is mounted to turn about an axis displaced from the axis of one of the shafts towards the belt. The unit can be swivelled from a central position in which the rollers are clear of the belt to positions on each side thereof in which the rollers contact the belt. Means are provided for latching the bearing unit in each of these three positions. In operation, only one of the rollers is fixed to its shaft. Means are provided for locking or freeing each roller to its shaft as required by the nature of the required twist.

Abstract: Nozzle assemblies for texturing one or several yarns consisting of a plurality of endless synthetic filaments are described wherein the yarn passes through a whirling chamber, fed laterally through at least one oblique bore with compressed air, into a nozzle with a spherical guide element located in the divergent part of the nozzle so as to define therewith an annular slot in which the spreading air stream from the whirling chamber is accelerated. The whirls and loops formed in the individual filaments are subjected to increased whirling by the deflection of the air stream by the guide element, which is mounted for both axial and lateral adjustment in the nozzle. The guide element may present a hemispherical surface towards the whirling chamber or, alternatively, a frusto-spherical surface with a central concavity. The yarn is withdrawn laterally from the air stream beyond the nozzle.

Abstract: Apparatus for moistening and texturing yarns is described wherein yarns travel side-by-side over a surface into which bores, one for each yarn, open. Water under low pressure is delivered through the bores, the diameters of which are so adapted to the titers of the yarns that the yarns travelling over the bores exert a suction effect on the water and carry the water between the filaments in each yarn, without any additional layer of water enclosing the yarn, to a texturing nozzle. While passing through the nozzle loops or convolutions are formed in the individual filaments of the yarns by compressed air blown into a whirling chamber in the nozzle. The air is discharged from the nozzle, carrying the water away with it at the same end as the textured yarn, now substantially dry and formed from the non-textured yarns, emerges from the nozzle.

Abstract: The yarn entry and exit openings in a container for high pressure gaseous or liquid yarn heating medium are each sealed by means of a plunger mounted to slide in a cylinder extending from the opening. Each plunger is formed with a longitudinal groove of U-shaped cross-section on its surface. Therefore, to thread the yarn, it is only necessary to withdraw the plungers from their cylinders, place the yarn in the grooves and replace the plungers. Substantially to eliminate the escape of medium along the grooves, each may have a depth substantially equal to its width and amounting to between 0.1 mm and 0.5 mm, according to the yarn. However, to accommodate yarn with knots along its length or strechable yarn, this dimension may be increased and the pressure of any escaping medium reduced in a stepwise manner by recesses distributed along the plunger and intersecting the groove, into which recesses any escaping medium can expand.

Abstract: A belt driving mechanism, providing a speed ratio that is infinitely variable between predetermined limits, of the type in which a belt embraces two pulleys adjustable in effective diameter depending on the separation of two conical discs, is described wherein an actuating element reciprocable between two abutments is mounted coaxially with the driving pulley which has an axially fixed disc and an axially adjustable disc. The actuating element carries a rod with a scale ring screwed onto its outer end, and to urge the axially adjustable disc towards the fixed disc, the actuating element moves the scale ring to take up clearance between itself and a thrust member connected by way of a thrust bearing with the adjustable disc and, on continued movement, to force the thrust member to move the adjustable disc.

Abstract: A friction drive for a twist-tube for false-twist texturing of textile yarns is described wherein a continuously running belt rotates a pair of driving rolls, maintained at a constant pressure against the belt, to which rollers for rotating the twist tube are co-axially fixed. The driving rolls are carried at the end of a rod, mounted to slide through a fixed holder and subjected to an axial force by a weight hanging on a cord passing over a pulley having a fixed axis to a pin on the rod. The rolls are so mounted on the rod that they can be arranged to engage either face of the belt. Therefore, the force necessary to press the driving rolls against the belt is reversible. This is achieved by providing the rod with two pins, either of which can be chosen for attachment of the cord and from which the cord will hang in opposite directions over the pulley. This gravity mechanism can be replaced by fluid or electromagnetic means for exerting the force on the rod.