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1. 发明申请

US20080304180A1 Bias techniques for magnetic tape media 有权
标题翻译：磁带介质的偏压技术
公开(公告)号：US20080304180A1
公开(公告)日：2008-12-11
申请号：US11810621
申请日：2007-06-06
申请人： Wayne P. Schaefer , Thu D. DePuydt , Bruce H. Edwards , Gregory W. Visich
发明人： Wayne P. Schaefer , Thu D. DePuydt , Bruce H. Edwards , Gregory W. Visich
IPC分类号： G11B5/78
CPC分类号： G11B5/584 , G11B5/03
摘要： The disclosure is directed to a method for creating a remanence magnetization on a magnetic tape medium. The magnetic tape is first substantially demagnetized, e.g., erased, by an erasure unit having multiple magnetic elements of alternating polarity. The erased magnetic tape is then passed by a bias magnet that creates a remanence magnetization on the magnetic tape. The remanence magnetized magnetic tape is then passed through a servo write head that writes servo patterns to the remanence magnetized magnetic tape. The bias magnet may be housed within the erasure unit or within a bias unit, and the distance between the bias magnet and the tape path of the magnetic tape may be adjustable to create the desired remanence magnetization on the magnetic tape. The remanence magnetization created on the magnetic tape may be greater than 20 percent to reduce defects in the servo pattern written to the magnetic tape.
摘要翻译：本公开涉及在磁带介质上产生剩磁磁化的方法。磁带首先通过具有交替极性的多个磁性元件的擦除单元实质上消磁，例如擦除。然后，擦除的磁带通过偏置磁体，在磁带上产生剩磁磁化。然后将剩余磁化磁带通过伺服写入头，伺服写头将伺服模式写入剩磁磁化磁带。偏置磁体可以容纳在擦除单元内或偏置单元内，并且偏置磁体和磁带的磁带路径之间的距离可以是可调节的，以在磁带上产生期望的剩磁磁化强度。在磁带上产生的剩余磁化可能大于20％，以减少写入磁带的伺服模式中的缺陷。

2. 发明授权

US08638518B2 Bias techniques for magnetic tape media 有权
标题翻译：磁带介质的偏压技术
公开(公告)号：US08638518B2
公开(公告)日：2014-01-28
申请号：US13528648
申请日：2012-06-20
申请人： Wayne P. Schaefer , Thu D. DePuydt , Bruce H. Edwards , Gregory W. Visich
发明人： Wayne P. Schaefer , Thu D. DePuydt , Bruce H. Edwards , Gregory W. Visich
IPC分类号： G11B5/024
CPC分类号： G11B5/584 , G11B5/03
摘要： The disclosure is directed to a method for creating a remnant magnetization on a magnetic tape medium. The magnetic tape is first substantially demagnetized, e.g., erased, by an erasure unit having multiple magnetic elements of alternating polarity. The erased magnetic tape is then passed by a bias magnet that creates a remnant magnetization on the magnetic tape. The remnant magnetized magnetic tape is then passed through a servo write head that writes servo patterns to the remnant magnetized magnetic tape. The bias magnet may be housed within the erasure unit or within a bias unit, and the distance between the bias magnet and the tape path of the magnetic tape may be adjustable to create the desired remnant magnetization on the magnetic tape. The remnant magnetization created on the magnetic tape may be greater than 20 percent to reduce defects in the servo pattern written to the magnetic tape.
摘要翻译：本公开涉及在磁带介质上产生残余磁化的方法。磁带首先通过具有交替极性的多个磁性元件的擦除单元实质上消磁，例如擦除。然后擦除的磁带通过偏置磁体，在磁带上产生残余磁化。然后将剩余的磁化磁带通过伺服写入头，伺服写入头将伺服模式写入残余磁化磁带。偏置磁体可以容纳在擦除单元内或偏置单元内，并且偏置磁体和磁带的磁带路径之间的距离可以是可调节的，以在磁带上产生期望的剩余磁化强度。在磁带上产生的剩余磁化可能大于20％，以减少写入磁带的伺服模式中的缺陷。

3. 发明申请

US20120262817A1 BIAS TECHNIQUES FOR MAGNETIC TAPE MEDIA 有权
标题翻译：磁带介质的偏心技术
公开(公告)号：US20120262817A1
公开(公告)日：2012-10-18
申请号：US13528648
申请日：2012-06-20
申请人： Wayne P. Schaefer , Thu D. DePuydt , Bruce H. Edwards , Gregory W. Visich
发明人： Wayne P. Schaefer , Thu D. DePuydt , Bruce H. Edwards , Gregory W. Visich
IPC分类号： G11B5/024 , G11B5/008
CPC分类号： G11B5/584 , G11B5/03
摘要： The disclosure is directed to a method for creating a remnant magnetization on a magnetic tape medium. The magnetic tape is first substantially demagnetized, e.g., erased, by an erasure unit having multiple magnetic elements of alternating polarity. The erased magnetic tape is then passed by a bias magnet that creates a remnant magnetization on the magnetic tape. The remnant magnetized magnetic tape is then passed through a servo write head that writes servo patterns to the remnant magnetized magnetic tape. The bias magnet may be housed within the erasure unit or within a bias unit, and the distance between the bias magnet and the tape path of the magnetic tape may be adjustable to create the desired remnant magnetization on the magnetic tape. The remnant magnetization created on the magnetic tape may be greater than 20 percent to reduce defects in the servo pattern written to the magnetic tape.
摘要翻译：本公开涉及在磁带介质上产生残余磁化的方法。磁带首先通过具有交替极性的多个磁性元件的擦除单元实质上消磁，例如擦除。然后擦除的磁带通过偏置磁体，在磁带上产生残余磁化。然后将剩余的磁化磁带通过伺服写入头，伺服写入头将伺服模式写入残余磁化磁带。偏置磁体可以容纳在擦除单元内或偏置单元内，并且偏置磁体和磁带的磁带路径之间的距离可以是可调节的，以在磁带上产生期望的剩余磁化强度。在磁带上产生的剩余磁化可能大于20％，以减少写入磁带的伺服模式中的缺陷。

4. 发明授权

US08228637B2 Bias techniques for magnetic tape media 有权
标题翻译：磁带介质的偏压技术
公开(公告)号：US08228637B2
公开(公告)日：2012-07-24
申请号：US11810621
申请日：2007-06-06
申请人： Wayne P. Schaefer , Thu D. DePuydt , Bruce H. Edwards , Gregory W. Visich
发明人： Wayne P. Schaefer , Thu D. DePuydt , Bruce H. Edwards , Gregory W. Visich
IPC分类号： G11B15/10
CPC分类号： G11B5/584 , G11B5/03
摘要： The disclosure is directed to a method for creating a remanence magnetization on a magnetic tape medium. The magnetic tape is first substantially demagnetized, e.g., erased, by an erasure unit having multiple magnetic elements of alternating polarity. The erased magnetic tape is then passed by a bias magnet that creates a remanence magnetization on the magnetic tape. The remanence magnetized magnetic tape is then passed through a servo write head that writes servo patterns to the remanence magnetized magnetic tape. The bias magnet may be housed within the erasure unit or within a bias unit, and the distance between the bias magnet and the tape path of the magnetic tape may be adjustable to create the desired remanence magnetization on the magnetic tape. The remanence magnetization created on the magnetic tape may be greater than 20 percent to reduce defects in the servo pattern written to the magnetic tape.
摘要翻译：本公开涉及在磁带介质上产生剩磁磁化的方法。磁带首先通过具有交替极性的多个磁性元件的擦除单元实质上消磁，例如擦除。然后，擦除的磁带通过偏置磁体，在磁带上产生剩磁磁化。然后将剩余磁化磁带通过伺服写入头，伺服写头将伺服模式写入剩磁磁化磁带。偏置磁体可以容纳在擦除单元内或偏置单元内，并且偏置磁体和磁带的磁带路径之间的距离可以是可调节的，以在磁带上产生期望的剩磁磁化强度。在磁带上产生的剩余磁化可能大于20％，以减少写入磁带的伺服模式中的缺陷。

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