US 7,601,763 B2
Diaphragm for speaker and manufacturing method thereof
Satoshi Hachiya, Yamagata (Japan); Koji Matsumoto, Yamagata (Japan); and Shunji Takeda, Ehime (Japan)
Assigned to Pioneer Corporation, Tokyo (Japan); and Tohoku Pioneer Corporation, Tendo-Shi (Japan)
Filed on Sep. 26, 2006, as Appl. No. 11/526,575.
Claims priority of application No. 2005-280399 (JP), filed on Sep. 27, 2005.
Prior Publication US 2007/0072953 A1, Mar. 29, 2007
Int. Cl. C08J 9/00 (2006.01); G10K 11/00 (2006.01)
U.S. Cl. 521—142  [181/175] 2 Claims
OG exemplary drawing
 
1. A diaphragm for a speaker, produced by forming acrylic foam made from methyl methacrylate, methacrylic acid, styrene, maleic anhydride and methacrylic amide.