Stepped precision winding process

US4667889A · kind A · utility

Assignee

• Barmag AG · DE

Inventor

• Siegmar Gerhartz · Remscheid, DE

Key dates

• Filing date: Mar 5, 1986
• Grant date: May 26, 1987
• Expiry date: Mar 5, 2006

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 ribbon free wound yarn packages is disclosed. In accordance with the method, a textile yarn is wound into a core supported package while the yarn is guided onto the core by a traversing yarn guide. The speed of the traversing yarn guide is proportional to the rotational speed of the package to define a substantially constant winding ratio during each of a series of sequential steps of the winding operation. The speed of the traversing yarn guide rapidly increases at the beginning of each of the sequential steps to produce a stepped precision wind. During at least some of the steps of the precision wind process, the winding ratio is varied from a predetermined ideal winding ratio by a series of recurring deviations, thereby avoiding the formation of undesirable patterns on the surface of the package.