Abstract: A hydraulic control valve is disclosed which is adapted to independently control the flow of hydraulic fluid to several consumer lines. The control valve includes a housing having a central bore, a pair of axially spaced apart consumer lines comunicating with the bore, a tank line communicating with the bore and positioned between the consumer lines, and a pair of hydraulic inlet lines communicating with the bore on the outer side of respective ones of the cosumer lines. A pair of slide valves are positioned in the bore, and each slide valve is supported in a neutral position by a coil spring. The two slide valves may be independently moved from their neutral position by a hydraulic control system, so that each slide valve is adapted to selectively establish communication between one of the consumer lines and the tank line, and between such consumer line and one of the hydraulic inlet lines.

Abstract: A method and apparatus for winding textile yarns into core supported packages is disclosed, and which is characterized by the ability to produce relatively large packages which are adapted to permit a high speed unwinding by withdrawal of the yarn over one end of the package. The method and apparatus involves controlling the yarn traverse guide so as to include stroke modification cycles during which the traverse stroke is progressively contracted and then increased, with the stroke modification cycles being designed to produce a precisely cylindrical package end with a uniform distribution of hardness along the package. In one illustrated embodiment, a number of stroke modification cycles having a relatively large contraction alternate with a number of stroke modification cycles having a relatively small contraction.

Abstract: A positive displacement reciprocating pump for conveying a liquid or gaseous fluid is disclosed and which comprises a fluid enclosure having a movable piston means mounted therein which sealably divides the enclosure into a pumping chamber on one side and an actuating chamber on the other side. The piston means may comprise either a slideable piston or a flexible diaphragm. An inlet valve and a separate outlet valve are each connected to the pumping chamber, and a control system is provided for intermittently supplying a pressurized working fluid to the actuating chamber so as to intermittently move the piston means in the discharge direction, with the piston means being moved in the opposite or suction direction by either the pressure of the fluid being conveyed, or a suitable spring.

Abstract: A yarn traversing apparatus is disclosed, which is adapted for use in winding a running yarn to form a cross wound package. The traversing apparatus includes a yarn guide bar, and a pair of oppositely rotating rotors, and the rotors include radiating arms which define two closely adjacent planes of rotation. The rotors are mounted for rotation about offset axes, so that the arms sweep across the guide bar in opposite directions to define the yarn traverse stroke. The rotors are rotatably driven by a gear drive system which includes a transmission shaft, and the transmission shaft and one of the rotors are mounted in eccentric bushings which permit the meshing gears to be adjusted so as to eliminate backlash.

Abstract: An apparatus is disclosed for simultaneously air jet entangling a plurality of advancing multifilament yarns. The apparatus includes a plurality of elongate air jet beams, with each beam having a longitudinal air passageway extending along its length, and at least one row of closely spaced air jet nozzle heads supported along each of the beams. Each of the nozzle heads includes a plurality of individual yarn entanglement nozzles and a central air chamber connecting the central air chamber to the air passageway. Also, an air jet aperture communicates between the air passageway and the yarn duct of each entanglement nozzle for directing an impinging airstream against an advancing yarn passing through the duct. The beams are mounted for adjustment on a supporting frame so that the nozzle heads may be positioned in proper alignment with a sheet of yarns passing therethrough. The beams may be rectangular or round in cross section and the nozzle heads are releasably connected along the length of the beams.

Abstract: A melt spinning apparatus is disclosed which is adapted for dividing a molten polymer into a plurality of streams to form synthetic filaments. The apparatus comprises a spin block assembly having two opposite sides, and two separate heating chambers disposed adjacent respective ones of the sides of the spin block assembly. The two heating chambers are interconnected by threaded members, so that the opposing surfaces of the chambers may be drawn together to clampingly engage the opposite sides of the spin block assembly therebetween. The formation of air gaps between the opposing surfaces, and which might hinder the heat transfer between the heating chamber and spin block, are thereby avoided.

Abstract: A yarn heating chamber is disclosed which comprises a rigid outer housing of U-shaped cross section and including transversely spaced apart side walls, and three plates mounted between the two side walls. A contact pressure gap is formed between the side walls and the adjacent surfaces of the two outer plates, and the central plate includes a yarn receiving groove on each of its outer surfaces. The central plate is laterally movable to a threading position wherein the grooves are exposed, and heating duct means is provided for introducing a hot pressurized vapor into the contact pressure gaps, to bias the two outer plates inwardly toward each other and thereby resiliently engage the central plate therebetween. The pressurized vapor is also conducted to each of the yarn receiving grooves.

Abstract: A yarn handling apparatus is disclosed for a textile yarn winding machine of the type having a plurality of side by side winding positions extending along the length of the machine. A separate yarn handling apparatus is associated with each winding position, and each handling apparatus comprises an assembly which includes yarn catching means, yarn severing means, and yarn suction means for withdrawing the severed yarn end. The assembly is mounted for movement along a predetermined path of travel between a first end position located on the upstream side of the spindle and where the yarn catching means is adapted to engage the running yarn as it moves in its predetermined yarn traverse stroke, and a second end position located on the opposite side of the winding spindle and where the running yarn is adapted to be engaged by a yarn catching and severing notch on the associated empty bobbin tube.

Abstract: An apparatus and method for processing a warp sheet of synthetic multifilament yarns is disclosed, and wherein the yarns may be withdrawn from supply packages and advanced along a path of travel in warp sheet form, heated and drawn while in advancing warp sheet form to orient the filaments, and then wound, for example, on a warp beam. Upon detection of a yarn break, the advance of the warp sheet is terminated, and means are provided for interrupting the application of heat to the sheet while the advance is terminated so as to avoid damage to the remaining yarns from a continued application of heat.

Abstract: A pneumatic sensor is provided for detecting and indicating the tension in running strand material, such as yarn, wire and the like. A source of compressed air is connected to an air escape nozzle having an outlet opening in one end thereof and a closing member is supported adjacent the outlet opening and is normally spaced a predetermined distance from the outlet opening to regulate and partially restrict the escape of air therefrom. The strand engages the closing member and varies the space or gap between the closing member and the nozzle outlet in accordance with the amount of tension in the strand. A pressure gauge is provided for indicating the amount of air pressure in the pneumatic pressure system and for thereby indicating the amount of tension in the running strand.

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: An apparatus for winding a high speed running yarn is disclosed, and which comprises a freely rotatable spindle for supporting the yarn packages being wound, and a slide which includes an outwardly extending support arm which is mounted above the spindle and which includes the yarn traversing mechanism and the drive roll for rotating the yarn packages. The slide is vertically movable so as to accommodate the build of the yarn packages on the spindle, and a lever arm is provided for supportingly engaging the support arm of the slide at a medial location along its length to support at least a substantial portion of the weight of the slide and thereby minimize the moment forces acting upon the means mounting the slide to the frame of the apparatus.

Abstract: A yarn winding apparatus is disclosed which includes means for facilitating the doffing of relatively large, heavy packages. The apparatus includes a U-shaped package holder having a pair of parallel arms, and a pair of mounting discs are mounted adjacent the free ends of the arms for mounting a bobbin tube therebetween. A package guide member is also mounted to the arms of the holder, with the guide member including a pair of tracks which are adapted to be positioned so as to underlie the ends of the bobbin tube and extend slightly downwardly toward the front of the machine. Control means are also provided for axially separating the mounting discs, to release the ends of the bobbin tube, and so that a full package may be released from the package holder. The package is then adapted to fall onto the tracks of the guide member, and roll forwardly along the tracks to a readily accessible position adjacent the front of the machine.

Abstract: A method and apparatus is disclosed for producing a synthetic multifilament yarn having enhanced bulk and hand characteristics, and which is capable of high production rates. Specifically, the invention involves advancing each of at least two continuous multifilament yarn components along respective paths of travel, with a first component being advanced at a higher speed than that of a second component. Also, the second slower yarn component is guided upwardly through a liquid bath to moisten the same, while the first faster yarn component is advanced along an essentially linear path of travel and free of contact with the liquid bath, so that the degree of tension in the faster yarn component is minimized upstream of the air jet nozzle, to thereby permit full development of the loops, coils, bows or the like in the filaments thereof in the air jet nozzle.

Abstract: A yarn heating chamber is disclosed which is adapted for thermally processing an advancing yarn. The chamber comprises first and second members each having a discontinuity in the form of a groove, shoulder or the like in a surface thereof, and the members are movably mounted with respect to each other between an operative position wherein the discontinuities are positioned relative to each other to define a relatively narrow yarn passage, and a threading position defining an enlarged opening to facilitate threading. Also, heating means is provided for introducing saturated water vapor into the yarn passage in the operative position, and the surfaces of the two members are in substantial heat exchange relation in both the operative and threading positions, so that the temperature of the two members remains substantially constant during a yarn threading operation.

Abstract: A rotary vane pump is disclosed which comprises a cylindrical housing, and a cylindrical rotor eccentrically mounted for rotation within the housing. The rotor includes a slot mounting a pair of oppositely oriented hook-shaped vanes, so as to define a hook space adjacent each end of the overlying vanes. A fluid, such as lubricating oil, is delivered to each hook space during that portion of its rotation shortly before its bottom dead center position, and the delivered fluid is pressurized during that portion of its rotation shortly after its bottom dead center position to assist in moving each vane outwardly from its bottom dead center position.

Abstract: The present yarn winding apparatus and method includes a yarn traversing mechanism, a pair of rotatably supported winding spindles, spaced apart main and auxiliary contact rolls, and a rotatable turret supporting said winding spindles in opposed relationship thereon. The turret rotates the winding spindles for successive movement into an operational position where one of the winding spindles is in engagement with the main contact roll and the other winding spindle is positioned out of engagement with both rolls and in position for yarn packages to be doffed therefrom. The turret also rotates the winding spindles into a yarn transfer position at which the winding spindle with full yarn packages thereon is in engagement with the auxiliary contact roll so that the yarn may be transferred from the full yarn packages to the empty tubes on the other winding spindle.

Abstract: An apparatus is disclosed for simultaneously air jet entangling a plurality of advancing multifilament yarns. The apparatus comprises a plurality of elongate air jet beams, with each beam having a longitudinal air passageway extending along its length, and a plurality of parallel yarn ducts extending transversely through the beam. Also, an air jet aperture communicates between the air passageway and each yarn duct for directing an impinging airstream against an advancing yarn passing through the duct. The beams are mounted to a supporting frame, with the beams being horizontally disposed and vertically spaced apart, and the beams are each mounted for rotation about a horizontal axis which extends longitudinally along its length, and the supporting frame is itself mounted for rotational movement about a horizontal axis which is parallel to the rotational axes of the beams.

Abstract: A yarn traverse apparatus is disclosed for winding a running yarn onto a rotating package, and which includes a first traverse means comprising a guide rail, and a pair of oppositely rotating arms mounted for rotation about closely adjacent parallel, or coaxial axes. A second traverse means is also provided which comprises a grooved roller positioned between the first traverse means and the yarn package being wound. In order to achieve a precise guidance of the yarn onto the package, the first yarn traverse means defines a guide stroke which extends beyond each of the ends of the traverse stroke defined by the grooved roller. In addition, the guide rail and/or the arms include means for guiding the yarn adjacent each of the ends of the guide stroke such that the yarn is free to rapidly rebound a short distance toward the center of the stroke, and is then restrained during movement through a second traverse distance.

Abstract: A yarn false twisting apparatus is disclosed which is adapted to produce a crimped composite yarn composed of an S twisted component and a Z twisted component, and wherein the full takeup capacity of the apparatus is utilized. The apparatus includes first and second false twisting units associated with each twisting position, with all of the first units being aligned in a first horizontal row extending along the length of the apparatus, and all of the second units being aligned in a second horizontal row. The two rows may be oriented with respect to each other, and the other elements of each twisting position, so that the paths of travel of the two components have an equal twisting length, and an equal cooling length.