Pile warp thread tension control apparatus for terry cloth weaving

US5722464A · kind A · utility

Assignee

• Lindauer DORNIER Gesellschaft mbH · DE

Inventors

• Walther Truyen
• Adnan Wahhoud · Lindau (Bodensee), DE
• Peter Czura · Schallstadt, DE
• Hans-Dieter Scorl · Gettorf, DE
• Josef Hehle · Bregenz, AT
• Werner Birner · Gettorf, DE

Key dates

• Filing date: Aug 16, 1996
• Grant date: Mar 3, 1998
• Expiry date: Aug 16, 2016

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D03D39/22
• WIPO field: Biotechnology
• WIPO sector: Chemistry

Abstract

The weaving of terry cloth is improved by preventing slackening of the warp threads during beat-up. The warp threads are kept in contact with a warp tensioning faller roller (8) at all times. For this purpose the faller roller (8) is eccentrically mounted and biased by a spring (46) retraction force applied through a control lever (48). The force of the spring (46) is in balance with the tension on the warp threads (4), whereby the spring (46) causes a warp length compensation during shed formation. A piston rod (52A) of a piston cylinder drive (52) acts on the control lever (48) of the faller roller (8). By pressurizing the cylinder (52), the faller roller (8) is tilted about an eccentrically mounted bearing shaft (14) and a rated pile warp thread length (54) is delivered or fed, without the pile warp threads (4) lifting away from the faller roller (8). One chamber of the drive cylinder (52) is periodically pressurized in synchronism with the terry cloth drive (17) for the beat-up of a group of weft yarn threads or both chambers of the drive cylinder (52) are pressurized for weaving a border or trim.