Manufacture of a composite tubular product
US4364770A · kind A · utility
14Cited by
11References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 24, 1981 |
| Grant date | Dec 21, 1982 |
| Priority date | — |
| Expiry date | Feb 24, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12097
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
For the purpose of introducing an additive into a molten metal bath, a reactive powder is enclosed in a tubular sleeve composed of a metal compatible with the bath. The cross-section of the sleeve is reduced after filling to compact the powder while leaving it porous. The filled sleeve can be formed by profiling a metal strip to a cup-shaped cross-section, metering the powder into the cup-shaped profile, closing the edges of the strip together to enclose the powder, forming the edges to hook together and crimping the hooked edges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.