Abstract: The temperature of a heating fluid used in a yarn crimping zone is controlled in response to whether a yarn plug is detected at a predetermined point, and in another embodiment a fluid is heated, passed to a yarn heating zone and a yarn is heated in the zone in response to whether the yarn is being wound in a yarn winding zone.

Abstract: A jet tangler is provided having a sharply angled passageway for the yarn and having a special air passageway arrangement which minimizes or substantially eliminates the aspiration effect encountered in jet tanglers of the prior art, especially at low tension. The tangler operates efficiently at low or high yarn tension, on texturized or as-produced yarn.

Abstract: A straightened, textured yarn is produced employing an apparatus comprising a crimping means, an entangling means and a heating and tensioning means which heats and applies tension to the crimped and entangled yarn prior to packaging.

Abstract: Multifilament synthetic polymer yarn is texturized by passing the yarn in a gas stream to a diffuser zone to cause the gas to expand and the yarn filaments to splay open. The yarn filaments are then separated from the expanding gas stream towards a continuous smooth side wall surface defining one end of a bulking chamber. At this end of the chamber the filaments are impacted with each other and the smooth wall surface to form a compact yarn mass. This yarn mass is pushed into and through a slotted portion of the bulking chamber. Simultaneously the gas passes through the yarn mass initially formed in the chamber and then discharges laterally from this mass as it is pushed into the slotted portion.

Abstract: Textile strand stabilization by filament interlacing is provided by means of jet apparatus having a longitudinal strand-receiving bore intercepted by at least one fluid-receiving bore substantially perpendicular thereto and to its minor transverse axis. Fluid injected into the fluid-receiving bore establishes within the longitudinal bore a vortex-like flow configuration substantially perpendicular to the longitudinal axis and to the minor transverse axis of the longitudinal bore. The apparatus preferably has a plurality of fluid-receiving bores offset along the longitudinal axis by distances up to the width of a fluid receiving bore.

Abstract: While being fed into a laterally confining region to be retained temporarily and be compressively crimped therein, laterally spaced textile strands are traversed laterally to and fro along the entrance to the region. The resulting uneven cross-sectional distribution of crimped strand accumulation in the region is conductive to separation of individual strands upon exiting from the region.

Abstract: Yarn in the form of a yarn wad is passed to a cooling and restraining zone wherein the surfaces of a plurality of balls are pressed directly against the surface of the yarn wad and simultaneously the movement of the balls relative to the yarn wad is restricted so that the balls are prevented from entering the yarn wad and the yarn wad is restrained due to the action of the balls upon the yarn wad. In addition, apparatus is provided useful in the method of the invention.