Furnace for heat treating glass sheet material
US3930831A · kind A · utility
Inventors
Key dates
| Filing date | Jan 20, 1975 |
| Grant date | Jan 6, 1976 |
| Priority date | — |
| Expiry date | Jan 20, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B29/025
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A furnace for heat treating glass sheet material including a circular enclosure having top, bottom and side walls of refractory material. Inlet and outlet openings are formed in the side walls. The side walls have an outer insulating layer and an inner layer of material having a low coefficient of thermal expansion, the inner layer having spaced end portions projecting beyond the outer layers and the periphery of the side walls to define said inlet and outlet openings. Each opening is controlled by doors, and each door includes an elongated support bar with a plurality of blocks of refractory material supported on the bar in end-to-end relationship. The blocks are adjustably secured to the bar to accommodate irregularities in the openings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.