Soundboard of composite fibre material construction for...

Details Soundboard of composite fibre material construction for... Soundboard of composite fibre material construction for...

2007-06-26

2007-06-26

Lockett, Kimberly (Department: 2837)

Music

Instruments

Stringed

Reexamination Certificate

active

11195470

ABSTRACT:
The invention relates to a soundboard of composite fibre material construction for acoustic musical instruments, comprising at least three sheets which each extend over a substantial part of the entire surface of the soundboard, of which the two outer sheets each contain a layer of long fibres embedded in a carrier material and the middle sheet has a lower density than the two outer sheets. In this case the long fibres of the two outer sheets are disposed parallel to one another in the respective sheet and—relative to an imaginary vertical longitudinal central plane of the soundboard—extend at acute angles between 2 and 25°. In this way a markedly improve acoustic quality and simplified production are achieved.

REFERENCES:
patent: 4353862 (1982-10-01), Kaman, II
patent: 6051764 (2000-04-01), Sakurai
patent: 6683236 (2004-01-01), Davis et al.
patent: 2115119 (1971-10-01), None
patent: 1 182 642 (2001-08-01), None
patent: WO91/00589 (1999-01-01), None
patent: WO 00/20360 (2000-04-01), None

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