Method for controlling a protective gas atmosphere in a protective gas chamber for the treatment of a metal strip
US8893402B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2012 |
| Grant date | Nov 25, 2014 |
| Priority date | — |
| Expiry date | Jan 30, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D1/74
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for controlling the atmosphere in a protective gas chamber for the continuous treatment of metal strips. A metal strip is guided into and out of the protective gas chamber via locks. At least one lock has at least two sealing elements for the metal strip which runs through it, with the result that a sealed chamber is formed between the two sealing elements. The gas pressure (P2, PD) is measured in the protective gas chamber and in the sealed chamber of the lock and the pressure (PD) in the sealed chamber is regulated, to be precise in such a way that, during operation, the differential pressure between the protective gas chamber and the sealed chamber is kept as far as possible to an optimum value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.