Moisture and gas-tight package that can be sealed by a film of thermoplastic material
US4722474A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 4, 1986 |
| Grant date | Feb 2, 1988 |
| Priority date | — |
| Expiry date | Feb 4, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S229/939
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A moisture-resistant package of the type which is in the form of a tray, constituted of a semirigid material such as corrugated cardboard, and including a bottom (10) and side walls (14, 16) articulated by fold lines to the bottom, and at least two horizontal flange members (24) articulated by fold lines along the upper edges of at least two of the side walls and extending toward the interior of the package in parallel with the bottom. The package includes an impermeable internal lining (28) constituted of a film of thermoplastic material which is applied by thermal molding against the interior faces of the bottom and side walls and which extends without discontinuity against the under face of the flange members (24) and folds over to apply against the upper face of the flange member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.