Electrochemically roughening aluminum sheet
US5449441A · kind A · utility
6Cited by
7References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 8, 1994 |
| Grant date | Sep 12, 1995 |
| Priority date | — |
| Expiry date | Mar 8, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S204/09
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Aluminum sheet is electrochemically roughened for use as a lithographic printing plate support or as capacitor foil. The alternating current used for electrochemical roughening is initially biased in a first way, e.g. anodically, and then in a second way, e.g. cathodically. Each biased current is sufficient at least to initiate formation of a pitting structure on the surface of the sheet. The method allows improved control over the pitting structure and more rapid electrograining of the sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.