Flexible bag having a drawtape closure
US7942577B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2006 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | Mar 16, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65F1/0006
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A flexible bag comprises flexible sheet material assembled to form a semi-enclosed container having an opening. The bag has a drawtape closure for sealing the opening. The sheet material of the drawtape closure exhibits elastic-like behavior along at least one axis. The sheet material of the drawtape closure comprises a first region and a second region. The first region and said second region are comprised of the same material composition and each has an untensioned projected pathlength. The first region undergoes a substantially molecular-level deformation and the second region initially undergoes a substantially geometric deformation when the sheet material is subjected to an applied elongation in a direction substantially parallel to an axis in response to an externally-applied force upon the sheet material of the drawtape closure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.