Cloth for loudspeaker diaphragm, loudspeaker diaphragm, and...

Details Cloth for loudspeaker diaphragm, loudspeaker diaphragm, and... Cloth for loudspeaker diaphragm, loudspeaker diaphragm, and...

2007-12-25

2007-12-25

Befumo, Jenna (Department: 1771)

Acoustics

Diaphragm

Critically defined material or coating

C181S196000, C381S426000, C381S428000, C442S217000, C139S42000D

Reexamination Certificate

active

09890863

ABSTRACT:
In a diaphragm for a loud-speaker of the present invention, an increase in tensile strength is averagely attained as a whole, and the over all diaphragm is uniformly colored without showing any lattice pattern. The diaphragm includes a woven fabric comprising yarns made from a blend of a plurality of fibers wherein at least one of the plurality of fibers is PBO (poly(p-phenylene benzobisoxazole)) fiber.

REFERENCES:
patent: 4856110 (1989-08-01), Giesick
patent: 4918912 (1990-04-01), Warner
patent: 4936085 (1990-06-01), Kolmes et al.
patent: 5233821 (1993-08-01), Weber et al.
patent: 02-057096 (1990-02-01), None
patent: 09-107595 (1997-04-01), None
patent: 10-257587 (1998-09-01), None
RD 354039 A English Abstract, Oct. 10, 1993.
RD 35439 “Uses for PBO Fiber” Complete Article. Oct. 1993.
Official Action, Japanese Patent Office, Aug. 22, 2003 with English Translation.

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