发明名称 |
Snap-action cartridge for recording disc |
摘要 |
A circular, shape-retaining cover is fastened to the hub of a rigid recording disc to provide a cartridge. The cover rotates with the disc and undergoes snap-action between a normal conical shape enclosing the periphery of the disc and an inverted conical shape providing free access to the recording surface from the entire periphery of the disc.
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申请公布号 |
US4464693(A) |
申请公布日期 |
1984.08.07 |
申请号 |
US19820369904 |
申请日期 |
1982.04.19 |
申请人 |
MINNESOTA MINING AND MANUFACTURING COMPANY |
发明人 |
GERFAST, STEN R. |
分类号 |
G11B17/028;G11B23/03;(IPC1-7):G11B23/02 |
主分类号 |
G11B17/028 |
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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