EP 0613321 A1 19940831 - Loudspeaker diaphragm for use in electroacoustic transducer.
Title (en)
Loudspeaker diaphragm for use in electroacoustic transducer.
Title (de)
Lautsprechermembran zur Verwendung in einem elektroakustischen Wandler.
Title (fr)
Membrane de haut-parleur destiné à être utilisé dans un transducteur électroacoustique.
Publication
Application
Priority
JP 5971693 A 19930224
Abstract (en)
A loudspeaker diaphragm is obtained with a fibrous material containing at least a kenaf fiber as a substitute for wooden fiber, the material being subjected to paper-making steps. The loudspeaker diaphragm thus manufactured with such non-wooden fiber can be made to closely resemble the one manufactured with the wooden fiber, to be light in weight, high in the rigidity and internal loss and still low in manufacturing costs. <IMAGE>
IPC 1-7
IPC 8 full level
B32B 29/00 (2006.01); D21C 5/00 (2006.01); H04R 7/02 (2006.01)
CPC (source: EP KR)
D21C 5/00 (2013.01 - EP KR); H04R 7/02 (2013.01 - EP KR); H04R 2307/029 (2013.01 - KR)
Citation (search report)
- [YA] GB 2245451 A 19920102 - SANSUI ELECTRIC CO [JP]
- [Y] JIM YOUNG: "Kenaf newsprint is a proven commodity", TAPPI JOURNAL, vol. 70, no. 11, November 1987 (1987-11-01), ATLANTA US, pages 81 - 83
- [A] G. F. TOUZINSKY ET AL.: "Papermaking properties of kenaf thermomechanical pulp", TAPPI, vol. 63, no. 1, January 1980 (1980-01-01), NEW YORK US, pages 53 - 55
- [A] PATENT ABSTRACTS OF JAPAN vol. 015, no. 326 (E - 1102) 20 August 1991 (1991-08-20)
- [A] PATENT ABSTRACTS OF JAPAN vol. 012, no. 077 (E - 0589) 10 March 1988 (1988-03-10)
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
EP 0613321 A1 19940831; EP 0613321 B1 19980422; DE 69409699 D1 19980528; DE 69409699 T2 19981126; HK 1009668 A1 19990604; JP H06253390 A 19940909; KR 940020863 A 19940916
DOCDB simple family (application)
EP 94200460 A 19940223; DE 69409699 T 19940223; HK 98110391 A 19980903; JP 5971693 A 19930224; KR 19940001592 A 19940128