Applying a pigment coating to a paper or cardboard strip

US6468592B1 · kind B1 · utility

Assignee

• Jagenberg Papiertechnik GmbH · DE

Inventors

• Ingo Becker · Linnich, DE
• Bernd Bohnenkamp · Düsseldorf, DE

Key dates

• Filing date: Feb 15, 2000
• Grant date: Oct 22, 2002
• Expiry date: Feb 15, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S118/04
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A web is coated by passing it in a horizontal web travel direction beneath a slot nozzle extending transversely of the direction. A pigment-carrying liquid is ejected at a flow speed from a slot of the nozzle to form a downwardly free-falling curtain extending across the web. A vertical inner face of a guide element is oriented at each outer edge of the curtain with each face extending from a respective end of the slot downward to adjacent the passing web. An upper region of each of the inner faces is fed is to a respective partial stream of the liquid such that the partial streams flow down the respective inner faces at a speed at least equal to the curtain flow speed and merge with the outer edges of the curtain.