Apparatus and method for controlling the flatness of a newly-formed continuous sheet of flat glass
US3940256A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1974 |
| Grant date | Feb 24, 1976 |
| Priority date | — |
| Expiry date | Oct 15, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B18/22
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Flat glass is produced by advancing a layer of molten glass on the surface of molten metal while cooling it sufficiently to form a continuous sheet of glass which is lifted upwardly from the surface of the supporting pool of molten metal and conveyed upwardly from it for further processing. A method is provided for selectively controlling the temperature, and thus the viscosity, of the glass of selected portions across the width of the continuous sheet of glass in order to adjust and maintain the relative lengths of the respective portions of the continuous sheet of glass as it is lifted upwardly from the supporting pool of molten metal and to thereby control the flatness of the continuous sheet of glass as it is ascending from the supporting pool of molten metal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.