Non-continuously laminated multi-layered bags
US9950841B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 2014 |
| Grant date | Apr 24, 2018 |
| Priority date | — |
| Expiry date | Oct 16, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1051
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Multi-layer bags may be formed to include first and second sidewalls joined along a first side edge, an opposite second side edge, and a closed bottom edge. The first and second layers may be non-continuously laminated together to include bonded regions in which the layers are bonded and unbonded regions in which the layers are not bonded. Such a bag may be described as a “bag-in-a-bag” type configuration in which the inner bag is non-continuously bonded to the outer bag. The inventors have surprisingly found that such configurations of non-continuous bonding provides increased and unexpected strength properties to the multi-layer films and bags.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.