Speaker device, and method and device for producing the same
US6899794B1 · kind B1 · utility
8Cited by
6References
13Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Oct 6, 2000 |
| Grant date | May 31, 2005 |
| Priority date | — |
| Expiry date | Jan 5, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/13
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A liquefied paper material is used as raw materials. A paper frame member 1 supporting a vibrating plate is paper-skimmed and formed. On paper-skimming and forming, a central hole for use in voice coils, air-release hole 1a releasing air pressure in a rear of the vibrating plate to outside due to vibration of the vibrating plate. A loudspeaker system is manufactured using the paper frame member 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.