| 发明名称 |
PRODUCTION OF SPEAKER CONES |
| 摘要 |
<p>PURPOSE:To form speaker cones of a wide piston vibration range and superior weather resistance by bonding foamed metal films of porous irregular network and nonairpermeable foils by using specific dies.</p> |
| 申请公布号 |
JPS5434816(A) |
申请公布日期 |
1979.03.14 |
| 申请号 |
JP19770101944 |
申请日期 |
1977.08.24 |
| 申请人 |
SUMITOMO ELECTRIC INDUSTRIES |
发明人 |
KAMIJIYOU EIJI;NISHIMOTO TATSUYA |
| 分类号 |
H04R7/02;B29C63/00;B32B37/00;H04R31/00 |
主分类号 |
H04R7/02 |
| 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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