Reserve winding of yarn on a tube of a cross-wound bobbin and method and appartus of forming same

US4878629A · kind A · utility

Assignee

• W. Schlafhorst AG & Co. · DE

Inventors

• Hans Grecksch · Mönchengladbach, DE
• Josef Bertrams · Edingen-Neckarhausen, DE
• Rene Bucken · Grefrath, DE

Key dates

• Filing date: Jun 16, 1988
• Grant date: Nov 7, 1989
• Expiry date: Jun 16, 2008

Classification

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

Abstract

A reserve winding of yarn on a tube on which a cross-wound package is built. The reserve includes an end projecting from the windings and extending to provide an initial length along the surface of the tube and around which windings are formed without substantial overlapping with the windings progressing from the inward extent of the initial length of yarn toward the tube end. The reserve winding is formed by a method utilizing an apparatus that is part of a traveling service unit and includes a suction conduit centrally located in a tube clamping plate for drawing-in the end of yarn and yarn guiding and advancing elements that guide the yarn inwardly along the surface of the tube and then advance the yarn outwardly during rotation of the tube to form the non-overlapping windings. The drawn-in end of the yarn is then cut at a maximum of approximately one centimeter from the windings or is inserted into the interior of the tube.