Method for making sound board
AssigneeKaman Aerospace Corporation
InventorCharles W. Kaman, II
Life of this patent
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Abstract
A fiber glass fabric reinforced wood sound board for a guitar is made by placing a sheet of wood in a shallow mold cavity with a layer of fiber glass fabric overlying an associated surface of the wood sheet, spreading a layer of liquid resinous compound over the layer of fabric to impregnate the fabric, providing a plate having a smooth surface, positioning the plate with its smooth surface in face-to-face engagement with the layer of liquid impregnating material to provide a substantial closure for the mold cavity, drawing vacuum on the mold cavity, and curing the liquid resinous material.
Claims5
A method for making a sound board assembly for a stringed musical instrument comprising the steps of positioning a layer of finely woven fiber glass fabric in adhering face-to-face relation with a sheet of wood with threads of the fabric extending in generally parallel relation to the grain of the wood, temporarily adhering said sheet of wood to a first mold plate with said fabric facing away from said plate, disposing a second mold plate so that a narrow space is left between said second mold plate and said layer of fabric to form a mold cavity between said first mold plate and said second mold plate, disposing said mold plates so that major surfaces of said plates are vertically oriented, introducing a transparent, curable liquid resin into the lower part of the space between said fabric and said second mold plate, evacuating air from between said mold plates at the upper part thereof while the curable liquid resin is being introduced fill said cavity, curing said resin to bond said fabric to said wood, and removing said sound board assembly from the mold plates.
Dependencies are inferred from the claim text.