Device and method for manufacturing a coated metal strip with improved appearance by adjusting a coating thickness using gas jet wiping
US11866829B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 25, 2020 |
| Grant date | Jan 9, 2024 |
| Priority date | — |
| Expiry date | Nov 25, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05C11/06
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A gas wiping device for controlling a thickness of a coating layer deposited on a running metal strip plated with molten metal in an industrial hot-dip installation includes: a main nozzle unit and a secondary nozzle unit, for blowing a wiping jet on a surface of the running strip, the main nozzle unit and secondary nozzle unit respectively including a main and secondary chamber fed by pressurized non-oxidizing gas and at least a main and secondary elongated nozzle slot formed in a tip of the respective main and secondary nozzle units, the tips each including an external top side, facing a downstream side of the running strip, and making an angle with the surface of the running strip. The secondary nozzle unit is adjacent the main nozzle unit over an external top side of the main nozzle unit tip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.