Metal working – Method of mechanical manufacture – Combined manufacture including applying or shaping of fluent...
Patent
1998-12-09
1999-10-19
Echols, P. W.
Metal working
Method of mechanical manufacture
Combined manufacture including applying or shaping of fluent...
295271, D21J 312
Patent
active
059667974
ABSTRACT:
A damper for a loud speaker is produced by molding a substrate into a desired shape in which a fabric or knitted cloth composed of core-sheath type conjugate fibers composed of filaments having a core-sheath type structure is used as the substrate. A resin used for forming a core material in the core-sheath type structure functions as a matrix of the substrate. A sheath material having a lower melting point than that of the core material functions as an excipient, and is fused by a heat treatment and then solidified during the molding process, so as to bond together the intersections of fibers constituting the substrate and to cover the surface of the fibers. Thus, only a simple substrate production process is required and a damper for a loud speaker having excellent moldability, water-proofness, and durability is obtained.
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Mizone Shinya
Okazaki Masatoshi
Shimizu Toshihiro
Tanaka Toyohiro
Tomikawa Toshihide
Echols P. W.
Matsushita Electric - Industrial Co., Ltd.
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