Vacuum sealed containers
US6799680B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 5, 2002 |
| Grant date | Oct 5, 2004 |
| Priority date | — |
| Expiry date | Jul 30, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1334
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Container or bags for sealing food or other objects are made from a composite material. The material has an outer oxygen-impermeable layer and an inner heat-sealable layer. The two layers are joined by an intermediate adhesive layer that is stiffer than either the inner or outer layer. Other embodiments may be made of a single layer of heat-sealable material that resists the flow or air or oxygen inside the container. Channels on the sides of the container or bag form an interconnecting network and allow a flow of air and oxygen for evacuation of the bag. The material may be laminated in a continuous fashion as a tube wherein bags are made by cutting and sealing the material at desired intervals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.