Heat sealing apparatus
US4792373A · kind A · utility
11Cited by
10References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1985 |
| Grant date | Dec 20, 1988 |
| Priority date | — |
| Expiry date | Jun 18, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/753
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A system for heat sealing in conjunction a pair of plastic strips each of having a series of regularly spaced transverse pockets so that the pockets together form chambers separated by webs. The two pocketed strips to be joined are brought together and the strips heat sealed around the pockets to seal the chambers from one another while passing cooling fluid over the pockets so as to avoid distortion or collapse of the pockets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.