Movable dam barriers for use in the manufacture of a glass ribbon on a molten metal bath
US3930829A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 15, 1974 |
| Grant date | Jan 6, 1976 |
| Priority date | — |
| Expiry date | Oct 15, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B18/18
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Movable lateral and longitudinal dam barriers are provided in a glass forming chamber of the type containing a molten metal. The movable lateral dam barriers control longitudinal convection currents in the molten metal to control the temperature of the glass as it moves through the forming chamber. The lateral dam barriers can be moved to change longitudinal convection currents to achieve the optimum temperature conditions in the glass ribbon for producing flat glass of a specific thickness at any desired ribbon speed. The lateral dam barrier can also be moved to change convection currents and glass ribbon temperature to facilitate the change over from producing a glass ribbon of one thickness to a glass ribbon of a different thickness. The movable longitudinal dam barriers control lateral convection currents in the molten metal to flatten the edge-to-edge temperature profile across the ribbon of a glass ribbon moving through the chamber supported on the molten metal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.