Method of anodizing hollow metallic bodies
US9382637B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 10, 2013 |
| Grant date | Jul 5, 2016 |
| Priority date | — |
| Expiry date | Jul 10, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D11/02
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A plurality of cup-shaped workpieces are anodized by first securing each of them in a downwardly open position on an electrically conductive and flat workpiece frame that is then inverted such that the workpieces are open upward and lowered into a body of anodizing liquid in a treatment bath until the workpieces are wholly immersed and the frame is in contact with a horizontal rail. Thereafter the frame is moved horizontally while wholly immersed in the anodizing liquid while electricity flows between the rail and a cathode immersed in the bath below the workpieces such the liquid anodizes surfaces of the workpieces. The frame is raised out of the body of liquid with the workpieces open upward, and, while the workpieces are still above the body of liquid, inverting the frame and the workpieces so that the workpieces are open downward and any treatment liquid drains downward into the bath.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.