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Drawing of

Ovation Making Sound Board 1982 Soundboard Patent

4,353,862 1982 Charles W. Kaman, II US Manufacturing Process 8 drawings

A method for making a fiber glass fabric reinforced wood sound board for a stringed musical instrument such as a guitar. A sheet of wood is placed in a shallow mold cavity with a layer of finely woven fiber glass fabric overlying the wood surface, impregnated with a transparent curable liquid resin, and cured under vacuum. The process produces a sound board that is highly resistive to cracking and checking, even at temperature extremes, while maintaining desirable sound amplification qualities at lower cost than conventional methods.

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