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:
Aug. 18, 1998
Filed:
Apr. 09, 1997
Fumiteru Shingu, Akishima, JP;
Kiyotaka Miyashita, Akishima, JP;
Kouichi Ogawa, Osaka, JP;
Akira Kose, Tachikawa, JP;
Asa Kimura, Yokohama, JP;
Foster Electric Co., Ltd., Tokyo, JP;
Nihon Koken Kogyo Co., Tokyo, JP;
Shiseido Co., Ltd., Kanagawa, JP;
Abstract
A loudspeaker diaphragm is provided as an injection molded material including 50 to 80 weight % of a matrix resin of polyolefins and 20 to 50 weight % of flaky mica having an average aspect ratio of more than 10 and including at least 3 weight % or more of pearl mica. The matrix resin of polyolefins includes respective flakes of the flaky mica orientated in parallel to thereby improve the acoustic characteristics and concurrently the design appearance of the diaphragm. The design appearance of the diaphragm can have bright colors and a pearly luster.