Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Defibration by projection or explosion
Patent
1997-01-10
2000-05-09
Lamb, Brenda A.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Defibration by projection or explosion
162231, D21B 136
Patent
active
06059926&
ABSTRACT:
To manufacture a diaphragm of the present invention for use in a loud speaker, first a suspension is made by putting fibers consisting chiefly of polysaccharide constituting fibrous molecules into water. Next, suitable pressure is applied to the suspension and then the suspension is jet out into the air of normal pressure. As a result, water which has penetrated into the fibers expands rapidly. This causes the fibers to be sufficiently loosen and split into fibrils. When the fibrils are used for manufacturing a diaphragm, since the fibrils get sufficiently entangled together, a highly stiff and elastic diaphragm with high internal loss is obtained. Optimum fibrils are obtained by simply adjusting the pressure. Therefore, the control of the manufacturing process is simplified.
REFERENCES:
patent: 1586159 (1926-05-01), Mason
patent: 1663503 (1928-03-01), Mason
patent: 1952169 (1934-03-01), Hawley
patent: 2007341 (1935-07-01), Olsen et al.
patent: 2080078 (1937-05-01), Mason et al.
patent: 2899242 (1959-06-01), Teichmann
patent: 3003191 (1961-10-01), Luth
patent: 3617433 (1971-11-01), Sutherland
patent: 3935924 (1976-02-01), Nagao et al.
patent: 4374702 (1983-02-01), Turbak et al.
patent: 4803242 (1989-02-01), Musata
patent: 5074959 (1991-12-01), Yamamaka et al.
patent: 5206466 (1993-04-01), Inamiyer
"The Material and Manufacture of Loudspeaker Cones" (The Journal of the Acoustical Society of Japan, vol. 30, No. 9, Sep., 1974).
Lamb Brenda A.
Sharp Kabushiki Kaisha
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