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:
Mar. 16, 2010
Filed:
Nov. 17, 2008
Satoshi Imamura, Kitagunma-gun, JP;
Takeshi Hirano, Sagamihara, JP;
Tomoaki Ogata, Maebashi, JP;
Toshikatsu Kuwahata, Gunma-gun, JP;
Satoshi Imamura, Kitagunma-gun, JP;
Takeshi Hirano, Sagamihara, JP;
Tomoaki Ogata, Maebashi, JP;
Toshikatsu Kuwahata, Gunma-gun, JP;
Victor Company of Japan, Limited, Yokohama, Kanagawa-ken, JP;
Abstract
On one surface of a piece of wooden sheet, a cloth or paper is adhered to make an adhered sheet. An approximately V-shaped notch is provided on the adhered sheet, the adhered sheet is wetted to be softened, and a lubricant which acts to keep water is impregnated thereinto. Edge portions of the notch are overlapped, and the adhered sheet is tentatively molded in an approximately horn shape by a first hot press molding. The adhered sheet is then dried, impregnated with thermosetting resin, and half-dried. The adhered sheet is subject to a second hot press molding. A moisture-proof agent is applied on the adhered sheet, a center hole for a voice coil and periphery are removed to make a speaker diaphragm having a predetermined dimension and shape.