Stretchable belt and process for the production thereof
US4662487A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 24, 1985 |
| Grant date | May 5, 1987 |
| Priority date | — |
| Expiry date | May 24, 2005 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD03D1/0005
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A stretchable belt, such as for safety belt restraint systems in vehicles, includes a base material and at least one additional material having a different stress-stretch curve. By providing a base material with higher deformability than the additional material the stress-stretch curve of the belt has a first steeply rising portion where the load is primarily transmitted to the additional material. At a given load point, the additional material abruptly tears, and the load is transmitted to the base material. Thereafter, the stress versus stretch curve continues at a substantially lower angle. In this manner, the belt absorbs a maximum amount of energy for a given maximum load and maximum stretch. The belt may be formed from a single type of raw material, mechanically or thermally treating it to provide different stress versus stretch characteristics for the base material and the additional material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.