The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 12, 2012
Filed:
Feb. 09, 2007
Kazuyoshi Mimura, Mie, JP;
Shinya Mizone, Mie, JP;
Kenichi Ajiki, Mie, JP;
Masahide Sumiyama, Mie, JP;
Toru Fujii, Shiga, JP;
Yoshiyuku Takahashi, Mie, JP;
Nobuo Nakamura, Mie, JP;
Toshihiro Shimizu, Mie, JP;
Hitoshi Satou, Mie, JP;
Kazuyoshi Mimura, Mie, JP;
Shinya Mizone, Mie, JP;
Kenichi Ajiki, Mie, JP;
Masahide Sumiyama, Mie, JP;
Toru Fujii, Shiga, JP;
Yoshiyuku Takahashi, Mie, JP;
Nobuo Nakamura, Mie, JP;
Toshihiro Shimizu, Mie, JP;
Hitoshi Satou, Mie, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A loudspeaker of high sound quality is achieved by improving rigidity of a material used for a diaphragm, a dust cap and a sub-cone. The diaphragm, the dust cap and the sub-cone of the loudspeaker are made of a paper beaten with the material containing bamboo fibers obtained from a bamboo tree aged one year or older, of which the fibers are finely beaten to an extent of micro-fibrillated form. The diaphragm and the dust cap are also made with a beaten paper containing at least 2 wt % of 'A fibers' having stems of no greater than 30 μm in diameter, and surfaces of the stems are fibrillated into shaggy branches having diameters of 1 μm or less.