Method and apparatus for applying viscous material to a substrate

US5322564A · kind A · utility

Assignees

• Bollhoff Verfahrenstechnik GmbH & Co., KG · DE
• Ford-Werke GmbH · DE

Inventors

• Ralf Ludwig · Preußisch Oldendorf, DE
• Robert G. Murray · Palo Alto, US
• Wolfgang Rosteck · Bielefeld, DE
• Heinz Wessel · Bensberg, DE

Key dates

• Filing date: Jun 16, 1992
• Grant date: Jun 21, 1994
• Expiry date: Jun 16, 2012

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B05D3/0406
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A layer of viscous material is applied to a substrate by constricting a stream of pressurized viscous material prior to entry into a chamber wherein the constricted filament-shaped stream is acted upon by radially inwardly and forwardly oriented currents of compressed air which reduce the thickness of the stream and issue with such stream from the chamber through an orifice. The orientation of air currents in the chamber is such that the filament is not imparted a swirling movement. The flow of air issuing from the chamber through the orifice forms a hollow cone which surrounds the filament of viscous material on its way toward contact with the substrate.