Apparatus for forming glass sheets with coaxial cavities
US5970747A · kind A · utility
4Cited by
9References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 4, 1999 |
| Grant date | Oct 26, 1999 |
| Priority date | — |
| Expiry date | Jan 4, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B23/033
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A glass ceramic or glass-ceramic sheet is formed by progressively reducing the thickness of the sheet by passing the sheet between successive pairs of counter-rotating rollers. The average viscosity of the sheet is maintained between 5.times.10.sup.4 and 10.sup.9 P during the sheet forming operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.