Multi-ply woven article having acoustical elements between double plies
US3966013A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1974 |
| Grant date | Jun 29, 1976 |
| Priority date | — |
| Expiry date | Sep 20, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24744
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A multi-ply woven article has elements positioned within pockets formed by double plies of the article to provide the article with desirable acoustical properties as well as considerable strength and rigidity. The double plies may comprise a generally parallel pair of rib plies which extend between the opposite faces of the article in generally zig zag fashion to form a plurality of intermediate rib portions, or a pair of generally parallel, spaced apart face plies forming each of the opposite faces of the article, or both. Some of the pockets formed by the double plies are filled with acoustical elements having a selected number of holes of appropriate size so as to pass sound waves therethrough at a controlled rate, while still other pockets are filled with non-acoustical elements which are generally impervious to sound waves. By appropriate location of the acoustical and non-acoustical elements the article is effectively provided with a plurality of chambers which trap and dissipate sound wave energy entering from outside the article.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.