发明名称 |
Bowed cassette shim and method for making |
摘要 |
A method is described for forming a novel bowed shim for a cassette which includes impacting one surface of a sheet of polymeric material with particles until layer-like portions adjacent its surfaces are differentially expanded and the material is bowed, and then cutting the shim from the material.
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申请公布号 |
US4458858(A) |
申请公布日期 |
1984.07.10 |
申请号 |
US19820337629 |
申请日期 |
1982.01.07 |
申请人 |
MINNESOTA MINING AND MANUFACTURING COMPANY |
发明人 |
NELSON, NORMAN E. |
分类号 |
G11B23/08;G11B23/087;(IPC1-7):G11B15/32;G11B23/04 |
主分类号 |
G11B23/08 |
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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