Process and apparatus for guiding the weft threads in weaving looms

US4875507A · kind A · utility

Assignee

• N.V. Michel Van de Wiele · BE

Inventor

• Johny Debaes · Moorslede, BE

Key dates

• Filing date: Dec 7, 1987
• Grant date: Oct 24, 1989
• Expiry date: Dec 7, 2007

Classification

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

Abstract

A process and apparatus for guiding the weft threads in looms comprising a weft guiding element which moves over three consecutive positions which coincide with the various phases of the weft insertion during weaving. In the carry position, the weft guiding element is positioned so that the weft thread crosses the path of the insertion rapiers and the cut-off end of the weft thread is firmly clamped by the clamping device of the weft scissors. Immediately after the weft thread is carried by the insertion rapiers into the shed, the weft guiding element moves downward towards the lay and forward towards the weft cutting device into the insertion position. The weft thread is now situated in the shed. As the beat-up movement of the reed begins, the weft guiding element moves simultaneously upward with the lay and forward towards the weft scissors, the beat-up position. The weft thread is now held in a virtually straight line, virtually parallel to the reed. Also, the weft thread moves into the weft scissors which cut this weft thread free and the clamping device of the weft scissors holds the end of the following weft thread at the moment the reed is at its beat-up position. During the…