Weft yarn insertion system having deactivatable slip conveyor and associated yarn brake

US5660213A · kind A · utility

Assignee

• IRO AB · SE

Inventors

• Lars H. G. Tholander · Haverdal, SE
• Paer Josefsson · Borås, SE

Key dates

• Filing date: Apr 23, 1996
• Grant date: Aug 26, 1997
• Expiry date: Apr 23, 2016

Classification

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

Abstract

An insertion system for the weft yarn of a jet loom, comprising a jet insertion device in the jet loom for withdrawing the weft yarn and for transporting the same into a shed, and a weft-yarn storage, supply and measuring device arranged upstream of the jet insertion device. The weft-yarn storage, supply and measuring device including a weft-yarn stopping and releasing device which is controllable in response to a weaving cycle. The insertion system also includes a mechanical weft-yarn slip conveyor arranged in the yarn path of the weft-yarn stopping and releasing device relative to the jet insertion device, which comprises at least on conveyor roller rotating in the insertion direction of the weft yarn at a faster circumferential speed than the maximum weft-yarn insertion speed and can be deactivated while the conveyor roller is rotating during the insertion process. With the slip conveyor activated, the weft yarn surrounds at least a partial region of the circumferential surface of the roller and can be acted upon with a slip conveyor force determined by the withdrawal tension in the weft yarn. The insertion system further includes a yarn brake arranged in the yarn path at the sl…