发明名称 |
APPARATUSES AND METHODS FOR PRE-ERASING DURING MANUFACTURE OF MAGNETIC TAPE |
摘要 |
The present invention relates to direct current ("DC") pre-erasing servo channels of a magnetic tape prior to writing servo data in a servo channel. The present invention particularly relates to those servo recordings which were written with a uni-polar current waveform. The DC pre-erase is performed using a uni-polar direct current of a polarity that is opposite to the polarity of the direct current used to write the servo data. This pre-erase may be done with one or more heads. Also, as will be described, the pre-erase of a servo channel and writing to a servo channel may be done by making two passes over a single head or by using two or more heads to perform both steps. Also, it is within the scope of the present invention to have the heads mounted on a single mount or have the heads on separate mounts and on separate tape decks.
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申请公布号 |
US2009067087(A1) |
申请公布日期 |
2009.03.12 |
申请号 |
US20080271203 |
申请日期 |
2008.11.14 |
申请人 |
ADVANCED RESEARCH CORPORATION |
发明人 |
DUGAS MATTHEW P.;SCHWARZ THEODORE A. |
分类号 |
G11B5/325;G11B5/008;G11B5/127 |
主分类号 |
G11B5/325 |
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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