Method for the heat-softened severance of glass tubes or plates

US5902368A · kind A · utility

Assignee

• Schott Glaswerke · DE

Inventors

• André Witzmann · Waldershof, DE
• Ulla Trinks · Mitterteich, DE

Key dates

• Filing date: Jan 15, 1998
• Grant date: May 11, 1999
• Expiry date: Jan 15, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03B33/0855
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Disclosed is a method for the heat-softened severance of thin-walled glass tubes or plates with a wall thickness of no more than 0.2 mm, wherein the glass is softened on a width of no more than 0.4 mm, the softened area is reduced by drawing to a wall thickness of no more than 0.05 mm, and then is separated by additional heating in the drawn-out area.