Method for making enamel beads and resulting product
US4372993A · kind A · utility
Inventors
Key dates
| Filing date | Dec 23, 1980 |
| Grant date | Feb 8, 1983 |
| Priority date | — |
| Expiry date | Dec 23, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23D5/04
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method of making an enamel bead and resulting bead which includes the provision of a short length of copper tubing forming a bead core member wherein the copper tubing is heated to a red hot state and rolled in copper enamel flux one or more times to coat the tubing following which the flux coated tubing is again heated to a red hot state and rolled in particulate enamel material to coat the tubing externally with enamel material, then heating the enamel material coating until it melts and is distributed throughout the tubing outer surface in the desired bead configuration and finally cooling the enamel coating to form a highly durable bead having a copper tubing core with an outer layer of enamel of a selected color.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.