H - Electricity – 04 – R
Patent
H - Electricity
04
R
H04R 7/12 (2006.01) H04R 31/00 (2006.01)
Patent
CA 2521785
The invention relates to a membrane (1) for a loudspeaker, characterised in that: it has a core (2) consisting of structural mousse which is very precisely cut and thermoformed to the desired geometric profile for the membrane; the external face (4) of the membrane is covered by at least one, preferably a plurality of, outer folds (5) of woven or nonwoven fibres impregnated with resin, forming a laminated material or outer skin (6); the inner face (7) of the membrane is covered or not by at least one inner fold (8) of woven or non-woven fibres impregnated with resin, forming a laminated material or an inner skin (9). Essentially the same results are obtained in terms of rigidity, but the invention creates a large difference based on the process for controlling the resin content and the polymerisation cycle. Ultimately, the stability of the characteristics is improved.
Membrane (1) pour haut-parleur caractérisée en ce que: elle comporte une âme (2) constituée de mousse structurale tranchée très précisément et thermoformée au profil géométrique voulu pour la membrane dont la face externe (4) est recouverte d'au moins un, de préférence plusieurs, « plis externes» (5) de fibres tissées ou non tissées imprégnés de résine, formant un stratifié ou « peau externe » (6), la face interne (7) est recouverte ou non de un ou plusieurs « plis internes» (8) de fibres tissées ou non tissées imprégnés de résine, formant un stratifié ou « peau interne » (9). On obtient sensiblement les mêmes résultats en terme de rigidité, mais on apporte une différence importante qui repose sur le process où l'on maîtrise le taux de résine et le cycle de polymérisation. Au final on obtient une plus grande stabilité des caractéristiques.
Chretien Gerard
de La Nouvelle Bruno
Focal-Jmlab (sa)
Goudreau Gage Dubuc
LandOfFree
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