Patent · US Expired

Method and apparatus for making contact-tempered glass sheets with reinforced edge stresses

US4826522A · kind A · utility

20Cited by

4References

12Claims

0Family size

Assignee

Saint-Gobain Vitrage Les Miroirs · FR

Inventors

Benoit D'Iribarne · Aachen, DE
Paul Houang · Paris, FR

Key dates

Filing date	Jan 29, 1988
Grant date	May 2, 1989
Priority date	—
Expiry date	Jan 29, 2008

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC03B40/005
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The invention relates to the tempering of sheets of glass and optionally their bending by the so-called contact process. It proposes a process in which the edge stresses of the glass sheets are reinforced by cooling the edges of the glass sheets in relation to their central zone, particularly by blowing on these edges with a cooling gas. It also proposes a device to perform this preferred cooling of the edges, as well as glass sheets thus tempered. The invention applies to the production of glazings having nonfragile edges, particularly for the automobile.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.