发明名称 |
Method for forming protective layer on a flexible magnetic disc sheet |
摘要 |
A method for forming protective layer on a surface portion surrounding the edge of a central aperture of a flexible magnetic disc sheet is described, comprising providing a radiation polymerizable composition on a surface portion surrounding the edge of the central aperture of the flexible magnetic disc sheet by screen printing, and hardening the composition by exposure to radiation; a flexible magnetic disc is also described, wherein a protective layer by the foregoing method is provided, with said protective layer having an inner diameter larger than the diameter of the aperture of the disc sheet and an outer diameter smaller than the diameter of the aperture of a jacket enclosing the disc sheet.
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申请公布号 |
US4647473(A) |
申请公布日期 |
1987.03.03 |
申请号 |
US19840658712 |
申请日期 |
1984.10.09 |
申请人 |
FUJI PHOTO FILM CO., LTD. |
发明人 |
KATO, MIKIHIKO;KOMINE, SHIGEO;MORITA, KAZUHIKO;OKUZAWA, YASUTOSHI |
分类号 |
G11B5/82;C09D133/12;G11B5/72;G11B5/84;G11B23/00;G11B23/033;(IPC1-7):G11B5/70 |
主分类号 |
G11B5/82 |
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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