Diaphragm for speaker and method of producing same
US4308094A · kind A · utility
13Cited by
7References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1980 |
| Grant date | Dec 29, 1981 |
| Priority date | — |
| Expiry date | Sep 24, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/699
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A diaphragm for a speaker obtained by forming a diaphragm base by screen processing a mixture of carbon fiber, pulp and polyvinyl alcohol fiber as a binder in a manner similar to that employed for making paper, depositing a thermosetting resin on the diaphragm base by impregnation or coating, and subjecting the diaphragm base, on which the thermosetting resin has been deposited, to electroless plating to deposit a metal film in the interstices between fibers and on the entire fiber surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.