Method and device for metallizing the internal surface of a hollow object
US4490408A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 1983 |
| Grant date | Dec 25, 1984 |
| Priority date | — |
| Expiry date | Mar 14, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C14/30
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A coating of metallic material is deposited on the internal surface of a hollow object. An elongate member comprising two electrical conductors extending side-by-side from end-to-end of the member has one end inside the hollow object and its opposite end outside the object. A filament has its two ends connected to the conductors respectively at the one end of the elongate member, and a crucible containing metal to be deposited is supported above the filament and in spaced relationship thereto. By supplying current to the filament by way of the conductors for the filament is heated to achieve thermonic emission. The filament and the crucible are connected to negative and positive terminals respectively of a potential source so that electrons emitted by the filament are accelerated towards the crucible and cause the crucible to be heated by electron bombardment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.