Damper for a loudspeaker and a method for producing the same
US5878150A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Mar 27, 1995 |
| Grant date | Mar 2, 1999 |
| Priority date | — |
| Expiry date | Mar 27, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49982
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A damper for a loud speaker is produced by molding a substrate into a desired shape in which a fabric or knitted cloth composed of core-sheath type conjugate fibers composed of filaments having a core-sheath type structure is used as the substrate. A resin used for forming a core material in the core-sheath type structure functions as a matrix of the substrate. A sheath material having a lower melting point than that of the core material functions as an excipient, and is fused by a heat treatment and then solidified during the molding process, so as to bond together the intersections of fibers constituting the substrate and to cover the surface of the fibers. Thus, only a simple substrate production process is required and a damper for a loud speaker having excellent moldability, water-proofness, and durability is obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.