Flexible packages with clog resistant degassing valve and methods of making the same
US10486881B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2017 |
| Grant date | Nov 26, 2019 |
| Priority date | — |
| Expiry date | Feb 14, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D81/2084
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A flexible package with a one-way, pressure-equalizing or degassing valve and method of making the same is provided. The package includes a tortuous path preventing particulate materials, e.g., fine powders, from clogging or interfering with opening and closing of said valve. The package includes a heat seal including discontinuities or gaps which defines a tortuous path between the valve and the compartment within the package in which the particulate material is located, allowing air and internal gases trapped in the package to escape through the valve while preventing fine powders, dust and particulate from reaching the valve body by trapping or collecting them in the tortuous path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.