Diaphragm for acoustic equipment

Details Diaphragm for acoustic equipment Diaphragm for acoustic equipment

1979-07-09

1981-06-16

Van Balen, William J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

428480, C08L 6702

Patent

active

042739004

ABSTRACT:
A diaphragm for acoustic equipment molded from a composition mainly consisting of a polyester-polyether block copolymer prepared by condensing a polytetramethylene-terephthalate with a poly(tetramethyleneoxide)glycol or any other polyester-polyether block copolymer. This diaphragm for acoustic equipment has an excellent low-pitched sound reproducing performance and flat acoustic pressure-frequency characteristics.

REFERENCES:
patent: 3674109 (1972-07-01), Murase
patent: 3963800 (1976-06-01), Gipp et al.
patent: 4004960 (1977-01-01), Crowell
patent: 4059715 (1977-11-01), Fletcher
patent: 4064098 (1977-11-01), Saitoh et al.

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