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:
Sep. 13, 1983
Filed:
May. 08, 1980
Tsunehiro Tsukagoshi, Ohmori-nishi, JP;
Etsuro Nemoto, Ohmori-nishi, JP;
Shinichi Yokozseki, Ohmori-nishi, JP;
Sumio Hagiwara, Ohmori-nishi, JP;
Toshikazu Yoshino, Ohmori-nishi, JP;
Yasuyuki Arai, Ohmori-nishi, JP;
Kazuyoshi Kobayashi, Tokorozawa, JP;
Pioneer Electronic Corporation, Tokyo, JP;
Abstract
A molding composition is obtained by blending flaky graphite with a resin component comprising a mixture of a thermoplastic resin having a glass transition temperature higher than room temperature and another thermoplastic resin having a glass transition temperature lower than room temperature. The composition is kneaded and rolled into a sheet to orient the graphite flakes parallel to the surface of the sheet. The rolled sheet is then molded into an article, for example, speaker diaphragm, arm pipe and head shell, which may be optionally be carbonized or graphitized. The resulting article exhibits improved physical properties, especially high specific modulus of elasticity comparable to aluminum and beryllium as well as good internal loss comparable to paper.