发明名称 |
Vibratory elements for audio equipment |
摘要 |
Vibratory elements for use in audio equipment are fabricated from a kneaded mixture comprising polypropylene and flaky graphite powder. The kneaded mixture is rolled into a sheet in which graphite flakes are oriented parallel to the surface, and the sheet is then formed into a desired shape, for example, a dome- or cone-shaped diaphragm and a cantilever, as by vacuum forming, air-pressure forming or press molding. The mixture may further include polymethyl methacrylate and/or rubber-like material. The elements are characterized by improved temperature resistance.
|
申请公布号 |
US4362772(A) |
申请公布日期 |
1982.12.07 |
申请号 |
US19810244895 |
申请日期 |
1981.03.18 |
申请人 |
PIONEER ELECTRONIC CORPORATION |
发明人 |
TSUKAGOSHI, TSUNEHIRO;YOKOZEKI, SHINICHI;HAGIWARA, SUMIO;UCHIDOI, MASATAKA;YOSHINO, TOSHIKAZU;ARAI, YASUYUKI |
分类号 |
B29C70/62;C08K3/04;G10K13/00;H04R1/02;H04R1/18;H04R7/02;(IPC1-7):B32B1/08;B32B5/00;B32B9/00 |
主分类号 |
B29C70/62 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|