Glass treating furnace
US3957479A · kind A · utility
Inventors
Key dates
| Filing date | Jan 20, 1975 |
| Grant date | May 18, 1976 |
| Priority date | — |
| Expiry date | Jan 20, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B35/20
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A furnace for treating glass sheet material and the like in a glass tempering system. The furnace includes an upper glass treating zone and a lower gas treating and distributing zone for homogenizing gases of different temperatures to minimize exposure of the sheet being treated in the treating zone to uneven temperatures. Diametrically opposed inlets and outlets are provided in the side walls controlled by doors, and a slot in the top wall extends between the inlets and outlets to permit movement of a material carrier through the furnace. A pressure chamber communicates with the slot to cool conveyor elements at the top of the furnace, and also to provide a pressure barrier resisting the escape of gases from the furnace through the slots. Air curtains impinge on the tops of the doors in their closed positions to reduce leakage at the top of the doors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.