Method and apparatus for bending and tempering glass sheets
US5755845A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jan 3, 1997 |
| Grant date | May 26, 1998 |
| Priority date | — |
| Expiry date | Jan 3, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B23/0307
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to the press bending and tempering of glass sheets, especially for use as glazings in vehicles. When the press bending system is not located in a heated environment such as a furnace, it is important to maintain the glass sheets at a sufficiently high temperature for an adequate degree of temper to be achieved on quenching the sheet. The present invention provides a method of bending and tempering a thin glass sheet comprising pressing the substantially horizontal sheet between moulds having opposed complementary shaping surfaces, at least one of the surfaces being heated, and subsequently quenching the surfaces of the sheet characterised in that the heated shaping surface is maintained at a temperature in the range from 200.degree. C. to 350.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.