Abstract: A method to roll multiple sections starting from a single round section, comprising the steps of: (a) passing the single round section between the rolls of a rolling mill to obtain a single bar including two substantially elliptical, united, twin sections, the major axes of the elliptical sections being inclined by an angle ranging between 5.degree. and 30.degree. in relation to an axis normal to the axes of the rolling rolls; and (b) passing the single bar including two substantially elliptical, united, twin sections between the rolls of a rolling mill to obtain twin-strand round sections.

Abstract: An invention for spinning with a balloon controlled by a checking device is disclosed. The invention is set in rotation by a spindle by means of a yarn, comprising the arrangement of a segment of free yarn constituting a balloon having a controlled and constant height and diameter of base and also comprising the arrangement of a guided segment of yarn downstream of the segment constituting the balloon. Also, the invention is for spinning with a rotary balloon-checking device, comprising a rotary checking device positioned about a yarn package and a tube and having a rotatably supported upper portion and a lower portion performing the function of distributing the yarn on the yarn package, wherein the checking device is open at its upper end and has a pre-determined diameter to contact the yarn.