Method of thermal toughening of glass in a fluidized bed
US4400193A · kind A · utility
21Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1979 |
| Grant date | Aug 23, 1983 |
| Priority date | — |
| Expiry date | Oct 19, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B27/052
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Glass is heated to a temperature above its strain point and is thermally toughened by chilling with a quiescent gas-filuidized particulate material which has gas-generating properties and a mean particle size in the range 30 .mu.m to 120 .mu.m, a particle size distribution in the range 1.15 to 2.78, a flowability in the range 69.5 to 92, and a thermal capacity per unit volume at minimum fluidization in the range 0.7 to 1.59 MJ/m.sup.3 K. The invention is particularly suitable for thermally toughening glass sheets for vehicle windscreens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.