Method of forming a decorative foamed resin speaker cover
US4769188A · kind A · utility
Inventors
Key dates
| Filing date | Oct 10, 1986 |
| Grant date | Sep 6, 1988 |
| Priority date | — |
| Expiry date | Oct 10, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/722
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A decorative speaker cover and a method for fabricating a speaker cover for use in a ceiling or wall comprising panels, the speaker cover having an appearance which blends with other panels so that it conceals the presence of a speaker system while providing satisfactory transmission of sound from the speaker system. The decorative speaker cover is fabricated by first forming a mold liner suitable for generating a facsimile of a ceiling or wall panel. Next, the mold liner is placed in a molding container and a closed cell expandable foam system is uniformly spread over the mold liner so that the foam rises vertically. The thickness of the resulting cast is reduced to a dimension below which acoustic transmission loss is not discernable by human ears.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.