Process for laminating laminated glazing assemblies

US6432240B1 · kind B1 · utility

Assignee

• SAINT-GOBAIN GLASS FRANCE · FR

Inventors

• Michael Balduin · Alsdorf, DE
• Hubert Havenith · Würselen, DE
• Michael Labrot · Aachen, DE

Key dates

• Filing date: Oct 29, 2001
• Grant date: Aug 13, 2002
• Expiry date: Oct 29, 2021

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B32B2309/68
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A process for laminating multi-layer pre-forms into laminated glazing assemblies is provided. The pre-forms are first subjected to a vacuum in an inlet lock. Then, the pre-forms are heated to an assembly or bonding temperature in a heating chamber, while still being subjected to vacuum. Next, the pre-forms are pressed using pressing pieces in a pressing chamber, which is also subjected to vacuum. A greater pressure is exerted along the edges of the laminated glazing assemblies so as to bond the edges, preferably by using membranes. In an outlet lock which follows the pressing chamber, the laminated glazing assemblies are again vented to atmospheric pressure. An apparatus suitable for carrying out the process is also provided. The apparatus has chambers which are connected together by conveyors so as to achieve a quasi-continuous flow of material.