Method and apparatus for sealing reclosable flexible containers without spot sealing
US5019027A · kind A · utility
15Cited by
4References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 9, 1990 |
| Grant date | May 28, 1991 |
| Priority date | — |
| Expiry date | Mar 9, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2995/005
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus and method for manufacturing reclosable thermoplastic containers which eliminates the need for spot-sealing zipper closures or zipper closure elements to a web of thermoplastic film prior to forming side seals and zipper end seals is provided. Opposing seal jaws provide increased heat and pressure to zipper closures in a manner which results in improved hermetic and fluid-tight side seals and zipper end seals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.