Process for heat sealing a cover to a container
US5181936A · kind A · utility
3Cited by
3References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 3, 1991 |
| Grant date | Jan 26, 1993 |
| Priority date | — |
| Expiry date | Sep 3, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4911
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Process for heat sealing a thermoplastic cover to a thermoplastic container wherein the cover has a channel formed thereon for receiving a sealing lip on the container walls. The lip and floor of the channel are melted and then cooled to form a solidified skin of thermoplastic over a molten core, the lip is mated with the channel and the melted portions thereof coalesced with the melt from the floor. Some of the coalesced melt exudes between the lip and the sides of the channel and solidifies to provide additional bonding. The produce produced by the process is also claimed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.