Process and device for application of vat dye, especially indigo, to a thread bundle

US6090157A · kind A · utility

Assignee

• Benninger AG · CH

Inventors

• Klaus Dieter Traut · Monsheim, DE
• Wolfgang Lange

Key dates

• Filing date: Jan 30, 1998
• Grant date: Jul 18, 2000
• Expiry date: Jan 30, 2018

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D06B23/18
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

In a process for the application of a vat dye, preferably indigo, to a thread bundle (1), before thread bundle (1) enters a dye liquor (3) it is run through a steam lock (5). Steam lock (5) is separated from a chamber (20) through which thread bundle (1) is run after leaving dye liquor (3) via a holding section (21) in an essentially oxygen-free atmosphere.