Method of making woven acoustical panel
US3966522A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 1974 |
| Grant date | Jun 29, 1976 |
| Priority date | — |
| Expiry date | May 23, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24149
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Acoustical panels are comprised of woven fabrics which have at least one face ply portion woven of warp and fill yarns comprising yarns of non-fugitive and fugitive material. The fabric is woven relatively densely to facilitate handling and use thereof in fabrication of the acoustical panel. The substantial disintegration of the fugitive strands of yarn at the completion of the fabrication process provides a selected porosity in the face portion of the woven fabric for controlled transmission of sound waves into the interior of the panel. In a preferred method of making an acoustical panel, the fabric is woven of yarns comprising a mixture of non-fugitive and fugitive material. After installation of porous acoustical elements into pockets formed in the face portion and insertion of mandrels into flutes formed within the fabric, the fabric is impregnated with resin, cured, and the mandrels removed. The formed panel is then heated to a temperature sufficient to burn out the fugitive yarns without affecting the non-fugitive yarns to provide the face portion with a desired porosity to sound waves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.