Rieter Cz A.s.

Jaroslav Markl

Tom&aacute;s Tesar

Josef Ludv&iacute;cek

A method of spinning-in yarn on an operating unit of a rotor spinning machine includes steps of yarn preparation for spinning-in, steps of spinning rotor preparation for spinning-in, and final spinning-in steps. The final spinning-in steps include at least the beginning of the sliver supply to the singling-out device, leading of the fibers from the singling-out device away from the spinning rotor for a predetermined time interval, letting the spinning-in yarn end get into contact with the collecting groove of the spinning rotor, and starting of the yarn draw-off and winding. At least some final spinning-in steps are time synchronized in relation to the closing of the spinning unit thus obtaining optimum piecer quality repeatedly at all operating units of the machine.

Method of spinning-in yarn on an operating unit of a rotor spinning machine and a device for carrying out the method

The invention relates to a rotor spinning machine comprising a plurality of operating units situated next to each other, each of which contains a spinning unit ( ) with a singling-out device ( ) having in its body a rotatably mounted combing roller ( ) equipped on its circumferential surface with an operative coating ( ) around which there is provided in the body ( ) of the singling-out device a circumferential fibre channel ( ) whose operative section extends in the sense of rotation of the combing roller ( ) from the mouth of the sliver feeding device ( ) to the supply channel ( ) bringing the singled-out fibres into the rotor, said circumferential fibre channel ( ) having provided therein the mouth of a closable auxiliary supply channel ( ) for pressure air. The closable auxiliary supply channel ( ) of pressure air of each spinning unit ( ) is connected to the outlet ( ) of a closable means ( ) related thereto whose inlet ( ) is by a pressure air pipe ) connected to a pressure air source ( ).

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Chodská, Czechia

Jaroslav Markl