Weft supply device including multiple thread packages and preparation mechanisms

US4987931A · kind A · utility

Assignee

• Picanol, N.V. · BE

Inventors

• Henry Shaw · Vleteren, BE
• Roger Ligneel · Beselare, BE

Key dates

• Filing date: Jul 25, 1989
• Grant date: Jan 29, 1991
• Expiry date: Jul 25, 2009

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D03D47/34
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A device for supplying weft threads in weaving machines with minimal twisting includes at least one rotatable set of thread supplies and one rotatable set of thread preparation mechanisms per set of thread supplies. The sets of thread preparation mechanisms are rotatable together with corresponding sets of thread supplies forming a rotatable assembly to prevent the weft threads from becoming tangled with one another as the sets rotate, for example to bring one of the thread preparation mechanisms adjacent a repair mechanism, or to change threads. A mechanism is further included which converts the rotational motion of the rotatable assembly into a translational motion essentially in the direction of the axis around which the assembly turns. By a suitable choice of the mechanism, lengthening of the thread after rotation can be fully compensated for by the translational motion of the thread supplies and of the corresponding thread preparation mechanisms.