Abstract: A self-stringing jet device for fluid texturing of yarn has a yarn needle mounted in the jet body through which yarn passes to the outlet end of the jet. There is a high efficiency venturi located in the passage of the yarn needle to facilitate stringup.

Abstract: The air jet is provided with a first cylindrical baffle (A) and a second planar baffle (B) supported adjacent the exit orifice (30) of the air jet for successive engagement by the yarn (Y) leaving the air jet. The baffles (A) and (B) successively engage and deflect the yarn as well as the air leaving the exit orifice of the air jet so that two different types of treatment are imparted to the yarn by the successive baffles to permit higher operating speeds and to enhance the quality of the textured yarn. The homogeneous quality of the yarn is enhanced and the yarn exhibits a tighter yarn cross-section bundle because the exterior loop surface and the number of periodic balloons are both reduced.

Abstract: Disclosed is a yarn texturing apparatus for producing a multifilament yarn containing complex interfilament entanglement, comprising a housing having inlet and outlet ends connected by a yarn passage, a turbulence section in the yarn passage, an exit orifice constituting the yarn outlet and communicating with the turbulence section and means for introducing pressurized gas into the yarn passage, which is improved by providing a yarn guide for separating a multifilament yarn blown out of the exit orifice from blown gas while guiding the yarn along a guide surface of the yarn guide. The yarn guide is provided outside of the housing and in the proximity of the exit end of the orifice, in a condition such that the yarn guide does not cross the center-line of the exit orifice and the guide surface of the yarn guide faces the yarn outlet end surface of the housing.

Abstract: An improved outlet apparatus for a bounce crimper is disclosed which includes a restrictor assembly provided with a bore and an internally mounted flat leaf spring. Extending beneath the leaf spring, a longitudinal slot may be provided through which a texturized multi-filament yarn of synthetic resinous material may be drawn in a reverse direction back into the restrictor assembly without entanglement and deformation of the flat leaf spring when the feed yarn is tangled.

Abstract: Improvements in thermoplastic yarn rebound texturizing method are provided by advancing a plurality of continuous filament yarns at different speeds into a stream of heated fluid advancing longitudinally of the yarns, hurling the yarns toward a foraminous surface by means of the stream of fluid while passing at least part of the stream of fluid through the surface, impinging the advancing yarns on the foraminous surface with sufficient force to induce compression crimps in the filament of at least the faster fed yarn, instantaneously rebounding the yarns from the foraminous surface, and continuously controlling the actual compaction of the yarn as it moves away from the crimping zone. The rates of advancement of the yarns respective to the fluid stream are such that at least one yarn is introduced into the system at a rate at least twice the rate of the other.

Abstract: Increased texturing speed, improved stability of operation and improved operation from jet-to-jet is obtained in a jet of the type disclosed by Lubach in U.S. Pat. No. 3,545,057 by locating the exit end of the orifice through the cylindrical portion of the yarn needle for directing gas to the venturi a distance from 0.375 to 0.65 inch (9.5 to 16.5 mm) from the tip of the needle and locacting a baffle at the outlet end of the jet.

Abstract: The baffle is in the form of a relatively thin flat plate supported in a fixed position substantially perpendicular to and spaced from the exit orifice of the air jet. The baffle is provided with an opening through which the yarn passes after leaving the exit orifice of the air jet. The opening produces a shock wave in the air leaving the exit orifice and passing through the opening and the yarn is drawn against an edge of the opening which functions as a twist trap. First adjustment means is provided for varying the distance between the baffle and the exit orifice and second adjustment means is provided for varying the perpendicular position of the baffle relative to the exit orifice. This baffle permits higher operating speed of the air jet and enhances the crimps, curls and loops imparted to the yarn by the air jet.

Abstract: An annularly segmented generally cylindrical pick-up container is disclosed for use in combination with bounce crimping apparatus which texturizes a multi-filament yarn of synthetic resinous material. The container includes a plurality of annular baffles which divide the container into a corresponding plurality of substantially annular chambers. The container is rotated while a texturized multi-filament yarn of synthetic resinous material is deposited into the annular chambers. As one chamber becomes full, the rotational axis of the container is moved to a new position so that the texturized material will begin filling the next radially outwardly adjacent annular chamber.

Abstract: A jet device for fluid texturing yarn has a yarn needle mounted in the jet body through which yarn passes to the outlet end of the jet. Pressurized air enters a chamber surrounding the needle through a stream forming restriction which is angled to direct a stream of air across the yarn guiding element and toward the outlet end of the jet providing greater turbulence for texturing the yarn.

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: A self-stringing jet device for fluid texturing of yarn has a yarn needle mounted in the jet body through which yarn passes to the outlet end of the jet. There is a high efficiency venturi located in the passage of the yarn needle to facilitate stringup.

Abstract: A self stringing jet device for fluid texturing yarn having a yarn needle slidably mounted in the jet body for movement from a preset operating position to a stringup position and back to the preset operating position wherein the pressure of the fluid returns the yarn needle to the preset operating position from the stringup position.

Abstract: A bulked multifilament yarn having filaments of polymeric material has alternating points of maximum polymeric density and minimum polymeric density occurring along the length of each filament with a maximum spacing of 10 meters. The yarn may have a crimped structure in which the crimps are of undulating form with more than 50% of the filaments having maximum amplitudes of undulation less than the diameter of the yarn and more than 50% of each filament lies on one side of a diametral plane of the yarn particular to that filament. A process of producing the yarn includes the steps of jet bulking yarn and projecting it against one end of an elongated package during which the pressure prevailing at said one end of the package fluctuates. The pressure varies between a maximum value and a minimum value with a frequency related to the rate of feed of the yarn.

Abstract: A non-twisted, heather yarn is formed of a plurality of major yarn bundles at least one of which is of a substantially different color from the remaining bundles. Each major yarn bundle is formed of a multiplicity of continuous filaments and has from about 10 to about 90 percent of its filaments cohering to form secondary bundles with the remaining filaments of each major bundle varying in number along the length of the yarn, being interlaced with other major bundles of the yarn, and being randomly located about the yarn axis. Each of the secondary bundles in each unit length of the yarn of about 6 inches has a portion thereof formed of greater than about 30 percent of the filaments of its major bundle and each of the secondary bundles in each unit length of yarn of about 8 inches is non-uniformly, differently oriented relative to the yarn axis.