Heat-sealing method for plastic containers
US3986914A · kind A · utility
53Cited by
3References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 22, 1974 |
| Grant date | Oct 19, 1976 |
| Priority date | — |
| Expiry date | Aug 22, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1054
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A plastic container is provided with a plastic bead seal at the junction of the interlocking fastener and the side edges of the container. The plastic bead seal acts as a barrier to the passage of fluids or contaminating bacteria through the fastener at this junction. A method and apparatus are provided for flowing plastic under heat and pressure into and across the junction to form the bead seal barrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.