Loudspeaker cone body
US9247368B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2008 |
| Grant date | Jan 26, 2016 |
| Priority date | — |
| Expiry date | Nov 26, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49005
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A loudspeaker cone body made of paper may include a chemically-bound nanomaterial, such as a carbon nanotube. The carbon nanotube may be chemically bound to a functionalizing agent having a chemical group chemically bound to one or more papermaking additives, such as a sizing agent or a wet strength agent, a dry strength agent, a resin or cellulose-containing papermaking stock material typically present in a paper loudspeaker cone body, such as pulp. Acoustic-related loudspeaker performance characteristics such as stiffness to weight ratio and an acoustic damping of the loudspeaker cone body may be altered by incorporation of the nanomaterials chemically bound to the loudspeaker cone body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.