Method of making a speaker edge containing isocyanate and polyol
US6543574B1 · kind B1 · utility
8Cited by
4References
11Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jan 17, 2001 |
| Grant date | Apr 8, 2003 |
| Priority date | — |
| Expiry date | Jan 17, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2307/029
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
It is an object of the present invention to provide a speaker edge which is high in strength, less in scattering of f0, high in waterproofness, small in amplitude at the time of resonance, easy to mold, and easy to be integrated with a cone body.That is, the present invention provides a speaker edge constituted by a molding which is molded in a manner so that a speaker edge raw material composition containing isocyanate and polyol is injected into a cavity of a mold by an agitating/mixing apparatus and subjected to reaction, foaming and curing in the cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.