Glass tempering system
US3934970A · kind A · utility
Inventors
Key dates
| Filing date | Feb 19, 1975 |
| Grant date | Jan 27, 1976 |
| Priority date | — |
| Expiry date | Feb 19, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B35/165
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A glass tempering system including a roller hearth furnace that has a conveyor with elongated rollers extending through an elongated heating chamber of the furnace and outwardly through elongated slots in the sides of the furnace so as to be supported on drive belts which are slidably driven along support surfaces to thereby frictionally drive the rollers and convey glass sheets over the rollers through the heating chamber. The furnace is of a modular construction and includes upper and lower housing portions with inner layers of refractory material that define the heating chamber. Flanges of the refractory material cooperate to define the elongated slots at the sides of the furnace. Heat seal arrangements extend between the refractory flanges and the conveyor rollers to mitigate heat flow from the furnace during use. A first electric motor drive mechanism drives belt sheaves that receive the drive belt at the end of the furnace where glass enters the heating chamber. Vertical support members carry belt sheaves receiving the drive belts at the other end of the furnace and are hydraulically positioned to control the tension of the belts. A secondary conveyor of the system receives t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.