Package containing quality-retaining agent
US4657133A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 1985 |
| Grant date | Apr 14, 1987 |
| Priority date | — |
| Expiry date | Feb 4, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2553/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A package containing therein an agent for retaining qualities of food products or the like. The material constituting the package comprises an outer layer made of a substantially gas-impermeable material, a first seal layer formed on the inner side of the outer layer, an inner layer formed on the inner side of the first seal layer, the inner layer allowing gas to pass through in the lateral direction thereof, and a gas-permeable second seal layer formed on the inner side of the inner layer. The peripheral portion of the second seal layer is adhered to each other to form a sealed package. The package has an exposed cross section of the inner layer, so that the environmental air can pass into the package to contact the quality-retaining agent through laterally the inner layer and then through the second seal layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.