Stepped precision winding process

US4697753A · kind A · utility

Assignee

• Barmag AG · DE

Inventors

• Heinz Schippers
• Seigmar Gerhartz · Remscheid, DE
• Rolf Kalthoff · Wermelskirchen, DE

Key dates

• Filing date: Mar 11, 1986
• Grant date: Oct 6, 1987
• Expiry date: Mar 11, 2006

Classification

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

Abstract

The invention provides an improved method for winding synthetic yarns and wherein the yarn is wound about a core at a substantially constant rate while the yarn is guided onto the core by a traversing yarn guide. The speed of the traversing yarn guide is proportional to the rotation of the package to define a substantially constant winding ratio during a series of sequential steps, and the speed of the traversing yarn guide is rapidly increased at the beginning of each of the sequential steps to produce a stepped precision wind. The upper and lower values of the traversing speed are both changed in a predetermined manner during the winding cycle, and so as to form a cylindrical package without harmful yarn patterns or bulges.