Abstract:
Yarn to be texturized by false twist is passed axially and sequentially through tubes, the input and output angles of the yarn in respect of the tube axes totaling between 300* and 600*.
Abstract:
A method for producing textured yarn wherein yarn is drawn through a heating zone, then a cooling zone, and then at least partially around an idler grooved roll which has its axis of rotation at an angle other than a right angle to the direction of yarn travel, and finally delivered from the treatment area. In passing around the grooved roll, the yarn drives the grooved roll and first contacts one side surface of the groove above the bottom, then moves down into the groove bottom, and finally up the opposite side wall before leaving the roll surface. Apparatus is disclosed schematically in the form of a drawtwister, with the drawtwister feed roll serving as the means to feed yarn to the texturing means, and the drawtwister draw roll serving as the means for delivering the yarn from the treatment area.
Abstract:
The specification discloses methods and apparatus for twisting, and specifically false twisting, yarns wherein a travelling yarn is constrained to take up a curved path in contact with a rotating curved tube. This causes the yarn to be twisted by engagement with the interior surface of the tube. All parts of the yarn in contact with the tube are twisted at substantially the same speed since the contact path is substantially parallel to the rotary axis of the tube.
Abstract:
Yarn texture is imparted with a high degree of twist, and at a high speed, to a continuous multifilament yarn; a low friction anvil member is spaced closely from a mating movable friction member. They thus form a barrier through which the yarn to be twisted cannot pass. The yarn is urged toward the barrier and toward the moving friction surface. High twist levels are attained by not only contacting the yarn with the moving friction surface but by wrapping it partially around such surface.
Abstract:
A method and apparatus is disclosed for imparting false twist to textile yarn wherein a friction twister is employed to impart a plurality of turns of twist to a strand of yarn for each revolution of the friction twister. The invention is particularly suited to situations wherein the yarn strand is moving rapidly. The disclosed frictional twister comprises two axially aligned hollow spindles containing frictional engagement means therein. The two spindles are driven by moving belts that contact the exterior circumferential surfaces of the spindles. Movable yarn guide means are provided to engage the yarn strand and assure adequate frictional engagement between the yarn strand and the frictional engagement means after the spindles are threaded up. Another embodiment of the friction twister has the capacity to handle a plurality of yarn strands simultaneously.
Abstract:
A curling sleeve for producing false twist on thermoplastic filament passed through the sleeve, the latter having friction rings at one or both ends, and the sleeve constituting the rotor of an electric motor.
Abstract:
Apparatus for producing a filament interlaced yarn comprises a cylindrical roller mounted for rotation on an axis extending at an angle to its longitudinal central axis. The yarn is pulled over the roller at right angles to the axis of rotation and rotation of the roller causes the yarn to roll back and forth across the face of the roller. The rolling of the yarn produces alternately S and Z twist which causes the filaments to become interlaced or tangled to a degree that the yarn can be used in ordinary textile operations without further twisting.
Abstract:
COMPACT MULTIFILAMENT YARN IS INTERLACED TO WEAVE SATISFACTORILY AS WARP IN AUTOMATIC POWER LOOMS WITHOUT SIZE OR TWIST. CONTINUOUS FILAMENTS HAVING AN AVERAGE STRENGTH OF AT LEAST 4.0 GRAMS PER FILAMENT, AND AT LEAST 50% HAVING A TENACITY OF AT LEAST 2.0 GRAMS PER DENIER, ARE PASSED THROUGH JET STREAMS TO PRODUCE YARN HAVING AN EXCEPTIONALLY UNIFORM BUNDLE COHESION MEASURED AFTER A BACKWINDING TEST OF STABILITY TO WORKING IN USE. THE YARN HAS A HIGHLY UNIFORM APPEARANCE FREE FROM FILAMENT
DEFECTS, E.G., NO MORE THAN 10 DEFECTS PER MILLION END YARDS OF YARN WHEN TESTED WITH A CONVENTIONAL DEFECT ANALYZER.