Separating weft thread waste of a single uncontaminated material from untwisted leno binding threads in trimmed catch selvages

US6039086A · kind A · utility

Assignee

• Lindauer DORNIER Gesellschaft mbH · DE

Inventors

• Peter Dornier · Gettorf, DE
• Valentin Krumm · Hergensweiler, DE

Key dates

• Filing date: Oct 2, 1998
• Grant date: Mar 21, 2000
• Expiry date: Oct 2, 2018

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D03D47/40
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A method and an apparatus serve to process a catch selvage that has been trimmed from a web being woven on a loom, so as to separate weft thread ends and leno threads from the catch selvage to produce a type-pure weft thread waste and a type-pure leno thread waste or reusable leno threads. The term "type-pure" refers to a waste material containing a single uncontaminated type or color of thread material, e.g. wool vs. synthetic or blue vs. red. After the catch selvage (1) has been trimmed from the edge (11) of the woven web (2), the leno threads (4, 4') are untwisted from each other by being rotated by an untwisting apparatus (5) in a direction opposite the binding twist applied by the leno device (18). Thereby, the full leno binding (1A) is completely unbound and opened, so as to release the weft thread ends (3A), which are then sucked into a proper one of weft waste collection containers (6B) by a suction pipe (6A), so that only a single type-pure and/or color of weft thread end is collected in each container (6B). The unbound leno threads (4) are collected as a type-pure waste or are rewound on spools to be reused. Alternatively, by using endless closed-loop leno threads (4'), t…