Abstract: A twist tube for a false twist device is described which is of the type wherein textile yarn being textured passes through a straight tubular part to a transverse pin of hard material round which the yarn is wound once prior to leaving the tube. To avoid ballooning at very high rotational speeds of the twist tube about its axis, the pin is fixed in the tubular part with its axis displaced laterally with respect to the tube axis by a distance which is a fraction of the pin diameter. Between its cylindrical ends the pin is formed with a cylindrical concave surface providing a gap with respect to the tube axis of a width of the order of half the yarn thickness. To aid threading, openings are provided on opposite sides of the tubular part and the one nearest the laterally displaced pin is enlarged to balance the twist tube about its axis.

Abstract: An improvement in false-twist yarn texturing machine of the type having a plurality of treatment positions each of which includes a yarn feed device, a first yarn delivery carriage, a heating tube, a cooling tube, a false-twist spindle, a second yarn delivery carriage, and a winding device, as well as an air blowing device located at the inlet of the heating tube and a suction device for removing smoke at the outlet of the heating tube, the improvement being a tubular connection between the outlet of the heating tube and the inlet of the cooling tube, which connection is pivotally mounted so that one end thereof can temporarily be engaged with the outlet of the heating tube, and the cooling tube is slidably mounted to permit sliding in the direction of its own longitudinal axis, the other end of the tubular connection being connected to the inlet of the cooling tube so that pivoting of the tubular connection may be caused by sliding the cooling tube in the direction of the tubular connection.

Abstract: System for treatment of a tow of fibers which are to be at least partially immersed in a liquid treatment bath, including hold-down bar and tow-guide combinations situated in at least two parallel vertical planes. The tow-guides are inclined with respect to the vertical and to each other. The means for attaching the hold-down bars and tow-guides allows positioning thereof in different positions.