Process for making closure caps having liners
US4312824A · kind A · utility
24Cited by
3References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 30, 1980 |
| Grant date | Jan 26, 1982 |
| Priority date | — |
| Expiry date | May 30, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/809
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for manufacturing a closure cap having a liner. A mass of molten thermoplastic is positioned in the inner face of a cap shell. The mass is spread by a heated punch and the spread mass is then formed by a cooled punch to the final liner shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.