Zippered closure for thermoformed package
US5063069A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 1990 |
| Grant date | Nov 5, 1991 |
| Priority date | — |
| Expiry date | Apr 27, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D33/2533
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A plastic film bag for foodstuffs or the like having opposed film bag walls joined at their edges and forming a mouth between the walls and at one side reclosable fastener strips between the walls at the bag mouth having facing releasably interlocking profiles thereon with a sealing strip extending from one profile to the wall of the other profile with the sealing strip being sufficiently broad to avoid stress thereon and preferably with the sealing strip having a frangible fracture line extending substantially parallel to the profile to be torn when the profiles are first separated with the fracture line formed in various ways including perforations, or a score line, or an insert in the sealing web defining the frangible fracture line or the web being formed of multiple parts joined by a portion that fracture more easy than the sealing web.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.