Process for joining polyurethane coated fabrics
US4508582A · kind A · utility
57Cited by
5References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 6, 1984 |
| Grant date | Apr 2, 1985 |
| Priority date | — |
| Expiry date | Feb 6, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2405
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for forming a strong, pressure-tight joint between fabric substrates includes coating each substrate with polyurethane on one side, superimposing the fabric substrates so that the polyurethane layers are together, welding elongated regions of the polyurethane together under heat and pressure and sewing through the weld. The edge is then folded over and bonded to itself and the material is spread out. The resulting material can be bonded to a sole to form a waterproof, lightweight boot.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.