| 发明名称 |
RECORDING DISC |
| 摘要 |
A recording disc (10, 18) is provided by a disc-shaped, formed-sheet-metal support (18) across which a flexible recording sheet (10) is stretched. The formed-sheet-metal support (18) has a central spindle opening (30) which can be precisely centered by simultaneously punching the spindle opening (30) and the circular periphery, thus permitting hight-speed rotation of the recording disc (10. 18) in use. |
| 申请公布号 |
DE3373850(D1) |
申请公布日期 |
1987.10.29 |
| 申请号 |
DE19833373850 |
申请日期 |
1983.03.28 |
| 申请人 |
MINNESOTA MINING AND MANUFACTURING COMPANY |
发明人 |
GERFAST, STEN R. MINNESOTA MINING AND |
| 分类号 |
G11B5/73;G11B5/82;G11B7/24;G11B17/028;G11B23/00;G11B23/033;(IPC1-7):G11B5/82;G11B5/84 |
主分类号 |
G11B5/73 |
| 代理机构 |
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代理人 |
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| 主权项 |
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