Furnace for heating glass sheets
US5122180A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 1991 |
| Grant date | Jun 16, 1992 |
| Priority date | — |
| Expiry date | Feb 15, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B25/08
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A furnace for heating glass sheets moving along the axis of the furnace has at least one differentiated heating cell, the heating elements of which disposed at the vault side are constituted of sets of electrical resistors controlled in temperature or in power and adjustable in height independently for each set. A portion of the electrical resistors are mounted parallel to the axis of the furnace, the other heating cells each constituting a longitudinal heating zone independent of the other longitudinal zones and having, at the vault side, heating elements composed of sets of electrical resistors subdivided into several independent transverse sub-zones, in which the electrical resistors are mounted perpendicularly to the axis of the furnace. The invention is applicable to the manufacture of curved and toughened panes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.