Method of forming an electroforming mandrel
US4067782A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 1977 |
| Grant date | Jan 10, 1978 |
| Priority date | — |
| Expiry date | May 9, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D5/67
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A process for nickel plating a cylindrically shaped hollow core mandrel suitable for chromium plating for use in an electroforming process for the production of endless seamless nickel xerographic belts, is disclosed. The process comprises providing a hollow core aluminum or aluminum alloy cylindrically shaped member and (1) anodizing this core member by using this core member as an anode in an anodizing bath where the cathode comprises lead or lead alloys and (2) nickel plating this anodized core member in a nickel electroforming bath where the core member becomes the cathode and the anode is nickel or nickel alloy. Additionally and optionally, this core member may then be (3) subjected to an acid dip bath where the core member remains for a particular length of time and, additionally, then the core member is (4) plated with chromium by placing the core member in a chromium electroplating bath with a metal anode of lead or lead alloys.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.