Barmag Barmer Maschinenfabrik Ag

Werner Pieper

Heinz Schippers

Erich Lenk

Manfred Mayer

Gerhard Martens

Reinhard Worpenberg

Siegfried Putsch

A method and apparatus for producing a ribbon free randomly wound yarn package is disclosed, and wherein a plurality of critical winding ratios at which undesirable pattern formations or ribbons would normally occur are determined and stored in a microprocessor control unit. During the winding operation, the spindle speed and traversing frequency are monitored by sensors and are transmitted to the control unit, and the control unit computes the optimum time for rapidly changing the traversing frequency so that the actual winding ratio moves rapidly through each of the approaching critical winding ratios. The original traversing frequency is re-established after having passed beyond each of the critical winding ratios.

Ribbon free wound yarn package and method and apparatus for producing

Apparatus and a threading method in a multi-unit spinning machine for synthetic fibers with an exposed front face of each winding unit, the apparatus comprising a soundproofing screen extending across at least one winding unit, means to move the screen along the front of the machine to offer soundproofing protection as the winding unit is placed into operation, and thread insertion means in the screen including an open-ended thread insertion slot extending longitudinally of the screen from its leading side edge. The threading method permits the simultaneous actuation of a winding unit and moving of the soundproofing screen into place as the unit is threaded with the help of a suction gun.

Spinning machine for synthetic threads

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Radevormwald, Germany

Werner Pieper