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US 2011/0237733 A1Published application
Waterproofing loudspeaker cones
AssigneeBose Corporation
InventorsAgota F. Fehervari, Martin J. Schad, Shawn Prevoir
Life of this patent
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Abstract
A water-resistant composite paper, suitable for use as a loudspeaker component, is made from a composition including hydrophobic fibers, stiffening fibers that retain stiffness when wet, and fluorocarbon. In some examples, fibrillated acrylic fibers and glass fibers are used.
Claims12
An apparatus comprising:
- a loudspeaker component made from a composition including:
- primary hydrophobic fibers including fibrillated acrylic fibers,
- stiffening fibers including glass fibers and that retain stiffness when wet, and
- fluorocarbon;
- wherein the stiffening fibers constitutes between 5% and 20% by mass of the composition.
2 more elements
An apparatus comprising:
- a loudspeaker component made from a composition including:
- primary hydrophobic fibers including fibrillated acrylic fibers,
- stiffening fibers including glass fibers and that retain stiffness when wet, and
- fluorocarbon
- wherein the glass fibers have an average diameter between 6 and 13 μm.
2 more elements
An apparatus comprising:
- a loudspeaker component made from a composition including:
- primary hydrophobic fibers including fibrillated acrylic fibers,
- stiffening fibers including glass fibers and that retain stiffness when wet, and fluorocarbon
- wherein the loudspeaker component is formed from a composite paper of uniform material composition and having a wet modulus of at least 80% of the paper's dry modulus of the same composite paper and a surfactant penetration time that is comparable to or longer than that of a cone formed at least partially from wood pulp.
1 more element
Dependencies are inferred from the claim text.