Annealing furnace purging and oxidation system and method
US7361238B1 · kind B1 · utility
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16Claims
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Key dates
| Filing date | Jun 1, 2004 |
| Grant date | Apr 22, 2008 |
| Priority date | — |
| Expiry date | Mar 21, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D8/1277
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
In an improved annealing furnace for laminations having a purge vestibule and an oxidation section, atmosphere injection tubes with atmosphere injection jets are provided in the oxidation section at a conveyor directly beneath trays conveying the laminations. Atmosphere extraction tubes are also provided along with a fan which draws atmosphere from the extraction tubes and provides a pressure output to the atmosphere injection tubes. The speed of the fan may be variable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.