FR2029257A6 - Tempering sheet glass - Google Patents
Tempering sheet glassInfo
- Publication number
- FR2029257A6 FR2029257A6 FR6901045A FR6901045A FR2029257A6 FR 2029257 A6 FR2029257 A6 FR 2029257A6 FR 6901045 A FR6901045 A FR 6901045A FR 6901045 A FR6901045 A FR 6901045A FR 2029257 A6 FR2029257 A6 FR 2029257A6
- Authority
- FR
- France
- Prior art keywords
- face
- viscosity
- cooled
- adjacent
- film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B27/00—Tempering or quenching glass products
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
The sheet is heated to give it a uniform viscosity of 1017 poises. One face is rapidly heated while the other face is moderately cooled to obtain a high viscosity gradient within a surface film adjacent to the hottest face. Immediately after being rapidly heated for a short duration, the hottest face and the adjacent film are cooled. This effects high tempering before a uniform viscosity of 1017 P is reestablished throughout the sheet. The untempered face is then rapidly heated, while cooling the opposite one, to achieve a high viscosity gradient in a film adjacent to the untempered face. In both cases these gradients are produced in two different viscosity ranges. During the first the range equals 1011 P, and during the second 1011 and 1017 P. Once the viscosity distribution has been obtained, the face having the lower viscosity, together with the adjacent film, is cooled to give a uniform viscosity of 1017 P, and finally cooled to the ambient temp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR6901045A FR2029257A6 (en) | 1969-01-21 | 1969-01-21 | Tempering sheet glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR6901045A FR2029257A6 (en) | 1969-01-21 | 1969-01-21 | Tempering sheet glass |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2029257A6 true FR2029257A6 (en) | 1970-10-16 |
Family
ID=9028048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR6901045A Expired FR2029257A6 (en) | 1969-01-21 | 1969-01-21 | Tempering sheet glass |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2029257A6 (en) |
-
1969
- 1969-01-21 FR FR6901045A patent/FR2029257A6/en not_active Expired
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