Closure with smooth edge
US4369643A · kind A · utility
8Cited by
18References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 28, 1980 |
| Grant date | Jan 25, 1983 |
| Priority date | — |
| Expiry date | Nov 28, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/47
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A metal cap or closure having a smooth, rounded edge. The smooth, rounded edge is formed by contacting the rough edge of the cap or closure with a plurality of moving metal spheres. The apparatus for forming the smooth, rounded edge includes a plate in which the spheres are rotatably mounted and a holder for holding the closure over the spheres so that the edge of the closure contacts the rotating spheres.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.