Abstract: A false-twist apparatus has three parallel shafts carrying interleaved sets of friction disks interconnected by drive belts for joint rotation; one of these shafts is journaled in a stationary mounting plate while the others are journaled in a carrier pivotally connected with that plate for swinging about a fulcrum offset from the three shaft axes whereby two of the disk sets can be separated to facilitate the introduction of a yarn into the intervening twisting region. A whorl on the carrier-supported shaft nearest the fulcrum is normally driven by frictional contact with a continuously moving tangential belt but is disengaged from that belt in the swung-out position of the carrier so that the disks are arrested during introduction of the yarn.

Abstract: A false-twist apparatus has a base defining a fixed axis on which is journaled a fixed disk assembly including a shaft and a plurality of disks journaled in the base with the shaft at the fixed axis and the disks spaced therealong. A pair of supports are pivotal on this base and define respective movable axes offset from their pivot axes. Journaled on each of these supports at the respective movable axis is a movable disk assembly including a shaft and a plurality of disks, the shaft lying on the respective movable axis and the disks being spaced therealong. The supports can be pivoted between inner positions with the disks overlapping and each assembly axis equispaced from the other two assembly axes and outer positions with the disk spaced radially. These supports can be secured in the inner positions for false-twisting of a filament passing axially up between the disks.

Abstract: A false-twist apparatus has a support defining three generally parallel and radially spaced axes surrounding a central axially extending twisting region. Respective shafts are journaled in this support for rotation about the axes and carry respective staggered sets of axially spaced disks whose rims radially overlap at the twisting region. Yarn eyes above and below the sets of disks are axially aligned with this twisting region so that a yarn to be false-twisted can pass axially through the lower eye, then zigzag along the regions in contact with the disks, and then pass axially out through the other eye. All of the disks are permanently joined and synchronously rotated. A holder displaceable in a straight line on the apparatus support carries a plurality of arms having yarn-pushing tips that can push a yarn to be false-twisted radially into the region.