Abstract: A process and apparatus for producing yarn by pneumatic means employing a stationary vortex, wherein yarn is first formed by means of a basic twisting movement from air revolving in a spinning chamber and then subjected outside of the spinning chamber to an additional twisting movement corresponding to that of the spinning chamber.

Abstract: A method and apparatus for producing core yarn comprising introducing yarn constituting the core through a supply channel into a stationary spinning chamber, leading the yarn inside the chamber along a straight line to staple fibres rotating in a plane perpendicular to the axis of the chamber, joining and wrapping the core with the staple fibres and guiding the finished yarn out of the chamber to take-up rollers. The spinning chamber comprises two cylindrical chambers with different diameters adjoining one another and in the cylindrical chamber of greater diameters there are tangentially disposed air guide vanes, a channel for discharge of the finished yarn, and a channel for supplying the staple fibres. The outlet of the channel for supplying the staple fibres is disposed above the inlet of the channel for discharge of the finished yarn and above the air guide vanes. In a widening portion of the cylindrical chamber of smaller diameter the inlet of the channel for supplying the yarn is provided.

Abstract: The manufacture of yarn in a non-rotational spinning chamber, using the air jets directed by a system of passages, the air flow stream rotating quickly becomes restricted to the whirl core, and swirled air flow is forced along the spinning chamber walls. The cylindrical, non-rotational chamber has one closed end and an insert incorporating a yarn discharge channel. Also provided as part of the chamber are peripherally disposed air supply ducts and a fiber delivery channel. The chamber is provided with a cylindrical element and air guides disposed under a fiber ring arranged at the chamber outlet.

Abstract: In manufacturing yarn inside a cylindrical, non-rotational chamber, air jets cause rotational motion to the fibers introduced into the chamber. The whirl core vacuum suction zone, i.e. on the cylindrical insert lower face and/or in the chamber outlet, where the whirl core intensification takes place, the rotating velocity of the air stream whirled into the chamber interior becomes inhibited by reducing the rotating velocity within the whirl core. The chamber is provided with peripheral ducts to supply air and also a fiber delivering channel. A cylindrical insert has a lower face that has attached thereto, restricting blades 9 arranged in the chamber outlet from the vacuum source side.

Abstract: The method and apparatus for manufacture of yarn from natural- and synthetic fibres, using a pneumatic spinning technique. The method according to the present invention is directed to fibres entrained in an air jet stream introduced into the non-rotational spinning chamber containing the fibres. The air jets having been whirled into the chamber by a system of nozzles and some portion of the air jet, in which the fibres are entrained, becomes separated inside the chamber and directed to the whirl cone zone to reduce the flow rate within this whirl core. The apparatus for carrying out the method of the invention consists of a cylindrical, non-rotational spinning chamber having a cylindrical insert disposed therein at one end and peripheral air supply ducts, as well as a fibre delivery channel at the other end. The insert at the side of a yarn discharge channel inlet, incorporates the peripheral ports provided with inlet means located between the channel and the ducts.

Abstract: The apparatus for pneumatic manufacture of yarn from natural or synthetic fibers employs a non-rotational chamber, has an insert which contains a central yarn discharge channel, circumferential ducts to supply air as well as a fiber delivery channel at the upper portion. The insert has the guides arranged about its lower periphery, the bottom edges of these guides being screened with a shielding ring, and the air supply air ducts are located beneath the upper edges of the guides. In an alternative design, the guides are associated with the distribution ring, whose lateral inner face is in common with the insert wall and guides to thereby form air passages.

Abstract: A device for damping vibrations of the holder of the cross-wound bobbin being driven frictionwise by the yarn guiding drum is provided with a spring (5) and a slidable pin (6) both placed within the hollow of the shaft (4) about which the holder (2) rotates. On the shaft (4) a stopper ring (7) is fixed immovably, abutting on the machine frame (8), and in the longer arm of the holder (2) a friction insert (9) is fitted. The spring (5) acting over the pin (6) on the lever (3) clamps the bobbin (1) in the holder arms (2), and shifts the holder to the left, pressing the holder arm with the friction insert (9) fitted therein down to the machine frame (8), and the friction force generated thereby damps the vibrations of the bobbin holder.