Paper making and fiber liberation – Processes and products – Articles
Patent
1993-08-03
1996-01-02
Lamb, Brenda Adele
Paper making and fiber liberation
Processes and products
Articles
162149, 162141, 162218, D21J 312
Patent
active
054805147
ABSTRACT:
The diaphragm of the electroacoustic transducer is made of a material in which fibers having at least two different radii taken out of wood are mixed together. Two mean radii A and B, among different mean radii of the fibers are set to satisfy the relationship: 0.5.times.A.ltoreq.B.ltoreq.0.5.times.A. By utilizing such a diaphragm, the balance of the density, rigidity, and internal loss of the diaphragm can be improved, and thus the acoustic characteristics of the electroacoustic transducer such as a speaker unit can be improved.
REFERENCES:
patent: 1717775 (1929-06-01), Hawley
patent: 3935924 (1976-02-01), Nagao et al.
"Radio Technology", Aug., 1983 Kunio IMAI.
Rydholm, Sven A., Pulping Process, Interscience Publishers, New York (1965) pp. 51-54.
Dinwoodie, J. M., The Influence of Anatomical and Chemical Characteristics of Softwood Fibers On The Properties of Sulfate Pulp, TAPPI, vol. 49, No. 2 (1966) pp. 57-67.
Pulp and Paper, Chemistry and Chemical Technology, Third Edition, vol. 1, James P. Casey, Wiley--Interscience Publication (New York) 1980 pp. 146-147.
Lamb Brenda Adele
Sharp Kabushiki Kaisha
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