Auto-expansible cushioning bag
US4232788A · kind A · utility
27Cited by
5References
7Claims
0Family size
Inventor
Key dates
| Filing date | Jan 31, 1979 |
| Grant date | Nov 11, 1980 |
| Priority date | — |
| Expiry date | Jan 31, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1345
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An auto-expansible cushioning bag constituted by a completely closed envelope of flexible, impervious and transparent material, and by at least two hermetically closed sachets, likewise of flexible, transparent and impervious material, which are integrated into the envelope and contain the ingredients necessary for the production of a foam of polyurethane or the like. The one sachet contains a mixture of polypropylene glycol ("polyol"), activators, water from which CO.sub.2 gas is generated to cause the expansion, and possibly a supplementary inflating agent, such as trichlorofluoromethane, and the other contains an isocyanate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.