发明名称 |
Magnetic pattern recording |
摘要 |
A pattern is recorded on a magnetic medium by passing the medium across a master rotary element having a predetermined pattern of magnetic and nonmagnetic areas. A first magnetic heat magnetizes the medium in a first direction, and a second head that provides a constant DC field then selectively magnetizes the medium in a different direction in those locations where the magnetic areas of the patterned rotary element do not shield the medium from the field.
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申请公布号 |
US3869711(A) |
申请公布日期 |
1975.03.04 |
申请号 |
US19740436765 |
申请日期 |
1974.01.25 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
BERNARD, WILLIAM R.;BUSLIK, WALTER S. |
分类号 |
G11B5/86;(IPC1-7):G11B5/86 |
主分类号 |
G11B5/86 |
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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