Abstract: A yarn traversing apparatus which includes a pair of oppositely rotating blades for respectively moving the yarn in opposite directions along a main guide edge in a medial portion of the yarn traverse stroke. An auxiliary yarn guide is mounted in each of the ends of the traverse stroke. The main guide edge and the auxiliary guide edges extend through the traverse plane from opposite sides thereof, and they are configured so that the main guide edge guides the yarn and controls its speed along the medial portion of the stroke and the auxiliary yarn guides guide the yarn and controls its speed in the end regions of the stroke. The yarn tension thereby can be maintained substantially constant along the full length of the stroke.

Abstract: A winding apparatus is disclosed which includes a rotatable revolver having a pair of spindles mounted thereon, with the spindles being adapted to coaxially mount one or more bobbin tubes. Upon rotation of the revolver, the spindles are moved between a winding position and a doffing position, and a traversing mechanism is provided for traversing an advancing yarn and so as to form a cross wound package on the tubes at the winding position. Means are also provided for automatically transferring the advancing yarn from the rotating full package which has been moved to the doffing position, to a rotating empty bobbin tube on a spindle which has been moved to the winding position, and which comprises a yarn lifting device for removing the advancing yarn from the traversing means and conveying the advancing yarn laterally to a yarn catching plane, and a yarn transferring mechanism which laterally deflects the yarn from the yarn catching plane to a bead plane which is within the normal traverse stroke.

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: 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: 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 method and apparatus is disclosed for producing a spun yarn composed of an inner substantially untwisted core having fibers spirally wrapped about the surface thereof. In a specifically illustrated embodiment, a yarn of staple fibers is advanced along a path of travel, while being laterally deflected by contact with each of three separate rotating discs, and so as to produce a rotating balloon which serves to open the yarn and loosen and separate fibers on the surface of the yarn. Subsequently, the advancing yarn is subjected to a false twisting operation, which serves to wrap the loosened fibers about the advancing yarn.

Abstract: A yarn traverse apparatus and method are disclosed for winding a running yarn onto a rotating package, and wherein at each end portion of the traverse stroke there is provided a guide rail, and a pair of oppositely rotating arms mounted for rotation about closely adjacent parallel, or coaxial axes. One arm moves the yarn along the guide rail and toward the end of the stroke, and the other arm returns the yarn toward the center of the stroke. The guide rail and/or the arms include means for guiding the yarn adjacent each of the ends of the stroke such that the yarn is free to rebound a short distance toward the center of the stroke, and is then restrained in such movement, and so that proper engagement of the yarn by the extremity of the arm moving into the traverse stroke is assured.

Abstract: A yarn winding apparatus is disclosed which is characterized by the ability to wind a plurality of running yarns onto a corresponding number of bobbins mounted on a common support spindle, and wherein the bobbins may be closely spaced apart to thereby permit the required length of the support spindle to be minimized. The apparatus comprises a plurality of side by side traversing assemblies extending along the length of the bobbin support spindle, with each traversing assembly comprising a yarn guide bar and a pair of oppositely rotating rotors. The rotors are each composed of two oppositely directed radial arms, which define two closely adjacent planes of rotation. The two rotors of each assembly are mounted for rotation about off-set axes, and such that the arms sweep across the guide bar in opposite directions to define the traverse stroke.

Abstract: A yarn winding apparatus is disclosed which is characterized by the ability to wind a plurality of running yarns onto a corresponding number of bobbins mounted on a common support spindle, and wherein the bobbins may be closely spaced apart to thereby permit the required length of the support spindle to be minimized. The apparatus comprises a plurality of side by side traversing assemblies extending along the length of the support spindle, with each traversing assembly comprising a yarn guide bar and a pair of oppositely rotating rotors. The rotors include arms which define two closely adjacent planes of rotation, and the two rotors of each assembly are mounted for rotation about offset axes and so that the arms sweep across the guide bar in opposite directions to define the traverse stroke.

Abstract: A method and apparatus is disclosed for serially winding a high speed running yarn onto bobbins without yarn stoppage between bobbin changes, and without loss of yarn. The method and apparatus includes at least two bobbin receiving chucks which are adapted to be serially delivered to a winding position. When the first bobbin becomes full, it moves laterally away from the yarn traverse guide, and the chuck with an empty bobbin and an associated yarn catching notch is moved into the yarn path of travel while being rotated, and with the notch being positioned axially outside the yarn traverse stroke along the empty bobbin. The separated full bobbin, which continues to receive the yarn, is then moved axially so that an end portion is aligned with the plane of the yarn catching notch on the empty bobbin. An auxiliary yarn guide is then moved to engage the yarn and terminate its traverse.

Abstract: A winding device for winding threads on one or more bobbin tubes releasably held on a rotatable chuck means with improved thread catching and gripping means, preferably in combination with associated thread severing means, in order to make a thread changeover from a completed bobbin to an empty bobbin tube without thread loss and without thread ends or residues being caught and retained on the chuck.

Abstract: A method and apparatus is disclosed for serially winding a high speed running yarn onto bobbins without yarn stoppage between bobbin changes, and without loss of yarn. The method and apparatus includes at least two bobbin receiving chucks which are adapted to be serially delivered to a winding position. When the first bobbin becomes full, it moves laterally away from the yarn traverse guide, and the chuck with an empty bobbin and an associated yarn catching notch is moved into the yarn path of travel while being rotated, and with the notch being positioned axially outside the yarn traverse stroke along the empty bobbin. The separated full bobbin, which continues to receive the yarn, is then moved axially so that an end portion is aligned with the plane of the yarn catching notch on the empty bobbin. An auxiliary yarn guide is then moved to engage the yarn and terminate its traverse.

Abstract: A process for the production of a core/mantle yarn, in which a core thread is continuously conducted through a spinning zone in a gap formed between two adjacent and oppositely moving surfaces; staple fibers are fed into the path of the core thread and come into frictional contact with the moving surfaces in said zone to spin the staple fibers about the core thread; the core thread is preferably stretched during the spinning in order to bring about a defined, predetermined elastic stretch of the core thread in the spinning zone; and the core thread has a roughened surface which may be obtained by using a staple fiber yarn or thread obtained by texturizing, weaving, twisting, etc. The invention is especially characterized by an improved adherence of the fibers of the mantle to the core thread by pre-coating the core thread with an adhesive, or preferably by preapplying colloidal silicic acid to the core thread.

Abstract: A process and apparatus for producing a thread from staple fibers by the open-end or round-about spinning methods wherein the individual fibers are transported by an air stream to the thread forming zone in the nip between two air-permeable rollers with suction applied from within the rollers, characterized by the use of a fiber-transporting air stream directed at an angle of impingement with reference to the thread forming zone of less than 45.degree., preferably 10.degree. or even less, with a vector of movement of the air stream being counter to the thread draw-off direction. An improved thread or yarn product is obtained by this process, being more compact and free of loose fibers.

Abstract: Apparatus for the open-end spinning or round-about spinning of a twisted thread from individual, discrete fibers using a known combination of paired rollers or drums, preferably air-permeable, perforated rollers or sieve drums cooperated with suction means within the rollers or drums to produce a line of thread formation extending longitudinally within the wedge-shaped nip formed by the rollers or drums, and further including a feed channel to supply individual fibers into the nip for twisting by the rollers or drums, and means to take off the twisted thread at one end of the nip. The apparatus is adjusted according to the invention to widen the nip in the plane of the thread forming line and in the direction of the thread take-off. Two equivalent adjustments of the nip lead to a spun thread of higher strength and better uniformity.

Abstract: Process and apparatus for spinning fibers into a yarn in a yarn forming zone in the gap between air permeable surfaces of two rollers or on a single, air permeable roller surface while drawing a current of air adjacent said zone through said surface or surfaces by suction means, a feed channel with a narrow mouth adjacent the yarn forming zone for feeding an air stream and individual, separated fibers therein to the yarn forming zone from a carding roller rotating in a carding chamber to which a sliver or tow of fibers is fed, a casing about the rollers and the mouth of the channel with means for maintaining a desired subatmospheric to superatmospheric pressure in the casing and especially in the free flight interval of the fibers from the channel mouth to the yarn forming zone, a pressurizable casing about the carding unit and at least one air passage from the casing to the carding chamber, and using sequential, cascade-type, pressure decreases in the carding chamber, the feed channel, the free flight interv

Abstract: Apparatus for open-end spinning of discrete fibers in a narrow gap between adjacent, air permeable surfaces of two tapered drums whose axes of revolution are at an acute angle and which rotate in the same direction, while drawing air through said surfaces along said gap, said tapered surfaces being frusto-conical or being a segment of a hyperboloid of revolution, and fiber feed means having a channel with an elongated, narrow mouth extending along said gap.

Abstract: An improved peripheral drive device for winding synthetic fibers wherein at least two turnably borne tension mandrel shafts for the reception of bobbin spools are mounted on a bobbin revolver. A servo motor is located on the rear side of the bobbin revolver and is initially positioned in axial alignment with the tension mandrel shaft having an empty bobbin spool mounted thereon which is waiting to be revolved into an operational position in which the fiber is transferred to it and the winding of the fiber upon it begins. The improvement relates to a swing lever fastened at one end of the servo motor and mounted at its other end for rotation during the bobbin changing operation about the axis of rotation of the bobbin revolver.

Abstract: Yarn spinning machinery and process utilizing a pair of perforated sieve belts, cylindrical sieve drums or hyperboloid sieve drums for twisting staple fibres at a line of yarn formation wherein the sieve members are moving in opposite directions while air currents are drawn through the sieve members on opposite sides of, and in opposite, twist-assisting flow directions, the line of yarn formation.

Abstract: An apparatus for the winding of continuous threads or yarns in which at least one chuck is provided, having a spool stop mounted thereon, on which at least one removable spool sleeve may be slidably positioned for thread take-up. The end surface of the spool sleeve has a lug formed on it which provides a defined spacing between the sleeve and stop when the sleeve is slid over the chuck. A means for cutting the continuous thread is located on the chuck in the space formed between the sleeve and stop. In the cutting operation, the thread is always presented to the cutting means at a constant, repeatable angle due to the action of the spool lug and a thread-catching notch formed on the end surface of the sleeve in a preferred embodiment of the invention. Furthermore, multiple spools may be mounted on the chuck in accordance with the teachings of the present invention in order to provide for increased efficiency of the winding operation.