发明名称 |
Flexible magnetic disk and method of making same |
摘要 |
A flexible magnetic disk is provided with a protective layer at the peripheral edge portion of the circular hole in the center of a magnetic disk sheet. The protective layer is formed by applying a radiation-polymerizable composition to the peripheral edge portion of the circular hole in the center of the magnetic disk sheet by letterpress printing, and exposing the composition to a radiation to cure the composition.
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申请公布号 |
US4699835(A) |
申请公布日期 |
1987.10.13 |
申请号 |
US19850795441 |
申请日期 |
1985.11.06 |
申请人 |
FUJI PHOTO FILM CO., LTD. |
发明人 |
TAKEUCHI, MOTOKI;NAKAMURA, JUNICHI |
分类号 |
C09D4/00;G11B5/72;(IPC1-7):G11B5/72 |
主分类号 |
C09D4/00 |
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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