发明名称 |
Speaker device |
摘要 |
A speaker frame is constructed from dried paper pulp. Features in the speaker frame such as holes or slits are formed by carbonizing corresponding sections in the dried paper pulp and applying shear processing to remove the carbonized material. A carbonizing mold contains protrusions corresponding to the sections in the dried pulp to be carbonized. The result is a high quality speaker frame that is biodegradable and can be produced economically.
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申请公布号 |
US6371241(B1) |
申请公布日期 |
2002.04.16 |
申请号 |
US20000490060 |
申请日期 |
2000.01.24 |
申请人 |
FOSTER ELECTRIC CO., LTD.;MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
YAMADA TERUHO;NAKADA TSUYOSHI;MORI SEIJI;IWASAKI TOSHIKAZU |
分类号 |
H04R9/02;H04R1/02;(IPC1-7):G10K9/18;D21H15/00;G10K9/22 |
主分类号 |
H04R9/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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