Device and method for length cutting in ultrathin glasses

US12319606B2 · kind B2 · utility

Assignee

• Schott AG · DE

Inventors

• Holger Wegener · Alfeld, DE
• Rainer Schwertfeger · Eschershausen, DE
• Michael Maedje · Grünenplan, DE
• Christian Diekmann · Hohenlockstedt, DE
• Markus Langer · Asperg, DE

Key dates

• Filing date: Jul 14, 2021
• Grant date: Jun 3, 2025
• Expiry date: Oct 17, 2041

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P40/57
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A method for the production of glass ribbon portions is provided that includes: transporting a glass ribbon at a velocity v1, wherein the velocity v1 is dependent on the predetermined glass thickness (d1), with the application of a tensile stress parallel to the edges of the glass ribbon, in a plane E1, and cooling the glass ribbon at a cooling rate that is dependent on the predetermined glass thickness (d1), inserting a score on the surface of the glass ribbon in at least one edge area by scoring the glass surface with a scoring tool, wherein the score has an angle a to the transport direction of the glass ribbon, deflecting the glass ribbon in a plane E2 to generate a bending stress and separating a glass ribbon portion with the formation of edges by breaking the glass ribbon on the extension of the score running transversely to the glass ribbon.