Loudspeaker diaphragm and method for making same

Details Loudspeaker diaphragm and method for making same Loudspeaker diaphragm and method for making same

1983-04-15

1985-05-21

McCamish, Marion E.

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Structurally defined web or sheet

Including variation in thickness

181167, 181169, 181170, 428288, 428296, 264119, 264122, 264126, D04H 104

Patent

active

045186421

ABSTRACT:
A loudspeaker diaphragm is disclosed which is formed of a slurry of cellulose fibers and polypropylene fibers. In the fabrication of the diaphragm, a felt is made of the slurry, and the felt is subjected to sufficient heat and pressure to fuse the polypropylene fibers together to form a skeleton or matrix which extends through the felt.

REFERENCES:
patent: 3935924 (1976-02-01), Nagao et al.
patent: 4190746 (1980-02-01), Harwood et al.
patent: 4291781 (1981-09-01), Niguchi et al.
Reinforced Olefin Polymer Diaphragm for Loudspeakers, Journal Audio Engineering Society, vol. 29, No. 11, pp. 808-813.
The Design and Manufacture of Loudspeaker Cones-An Introduction, George C. Johnston, (Preprint No. 919, (A-4), May 15, 1973).
"Reinforced Olefin Diaphragms for Speakers", National Technical Report, vol. 25, No. 5, (Oct. 1979).

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