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US 4,531,609 AGranted
Sound absorption panel
AssigneeMidwest Acounst-A-Fiber
InventorsJerry M. Wolf, Wilbur D. Holben
Life of this patent
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Abstract
Two pelts of fiberglass are bonded together to form a sound absorption panel. One pelt is deformed to a sawtooth shape and the teeth of the sawtooth pelts are bonded into grooves in the other pelt which is essentially flat except for the grooves.
Claims2
A sound absorbing panel comprising first and second layers of fiberglass partially in contact,
- the first layer being formed into a sawtooth shape,
- the second layer being flat on one side and having parallel grooves impressed into the other side,
- the two layers being assembled with the teeth of the first layer resting in and bonded to the grooves in the second layer,
- the fiberglass of the second layer intermediate the grooves is of less density than (1) the fiberglass at its grooves and (2) the fiberglass of the first layer,
- the fiberglass of the second layer intermediate the grooves fluffs up to fill part of the cavities formed by the sawtooth shape intermediate the grooves,
- a fabric layer bonded to and conforming to the sawtooth surface of the first layer on the surface facing away from the second layer.
3 more elements
Dependencies are inferred from the claim text.