Diaphragm for use in electro-acoustic transducer
US4674592A · kind A · utility
5Cited by
2References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1985 |
| Grant date | Jun 23, 1987 |
| Priority date | — |
| Expiry date | Nov 12, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31783
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A diaphragm for use in an electro-acoustic transducer comprises a diaphragm main body only or mainly composed of natural fibers, a layer formed by laminating thereover a polyamide resin and a synthetic resin coating layer further formed to the surface of the laminate layer. The diaphragm is free from pin holes, exhibits satisfactory water proofness and excellent physical properties such as sonic propagation velocity inherent to the natural fibers. It can be fabricated with ease at a good yield and can reduce the fabrication cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.