Ribbon free wound yarn package and method and apparatus for producing the same

US4504021A · kind A · utility

Assignee

• Barmag Barmer Maschinenfabrik Aktiengesellschaft · DE

Inventors

• Heinz Schippers
• Erich Lenk · Remscheid, DE
• Gerhard Martens · Henstedt-Ulzburg, DE
• Manfred Mayer · Niedernhausen, DE
• Werner Pieper · Kerpen, DE
• Siegfried Putsch · Lauterecken, DE

Key dates

• Filing date: Mar 18, 1983
• Grant date: Mar 12, 1985
• Expiry date: Mar 18, 2003

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H2701/31
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

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.