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    • 2. 发明授权
    • Tape reel with brake and dust shield
    • 磁带卷盘带制动器和防尘罩
    • US5297754A
    • 1994-03-29
    • US902094
    • 1992-06-22
    • Thomas R. AlbrechtArmando J. ArgumedoJames H. EatonDon G. EastSteven L. FeldeDouglas W. Johnson
    • Thomas R. AlbrechtArmando J. ArgumedoJames H. EatonDon G. EastSteven L. FeldeDouglas W. Johnson
    • G11B23/037G11B23/08G11B23/087G11B23/04
    • G11B23/087G11B23/037
    • A tape reel brake which is mounted in a well in the top of a tape reel hub. The well is inside the tape bearing surface of the hub. The brake is mounted to be compliantly biased away from the base of the well. The hub is seated against a first inside surface of a tape cartridge housing. The hub and brake are seated in the tape cartridge such that teeth on the periphery of the brake are biased against the opposite inside surface of the cartridge housing about the periphery of an opening therein. The biasing of the brake against the opposite inside surface both prevents the rotation of the reel and shields out dust when the tape cartridge is removed from a tape drive. To rotate the reel, a tape drive clutch enters the opening in the opposite inside surface and depresses the brake into the well to mate with a smaller diameter portion of the hub or a recessed portion of the brake. The hub is always maintained on the inside surface of the housing, thereby eliminating lateral motion which could disrupt the tape path.
    • 磁带盘式制动器,其安装在磁带盘毂的顶部的井中。 井在轮毂的带轴承表面内。 制动器被安装成顺从地偏离井的底部。 轮毂位于带盒壳体的第一内表面上。 轮毂和制动器位于带盒中,使得制动器周边上的齿偏压在盒壳体的相对的内表面周围的开口周边。 制动器抵靠相对的内表面的偏压防止了当磁带从磁带驱动器上移除时,磁带盘的转动和屏蔽灰尘。 为了旋转卷轴,带驱动离合器进入相对内表面的开口,并将制动器压入井中,以与轮毂的较小直径部分或制动器的凹陷部分配合。 轮毂总是保持在壳体的内表面上,从而消除可能破坏带路径的横向运动。
    • 3. 发明授权
    • Servo and data format for magnetic tape having plural spaced-apart servo
areas interleaved with data track areas having serpentine track
scanning using any one of a plurality of number of concurrently
accessed tracks
    • 具有多个间隔开的伺服区域的磁带的伺服和数据格式,该伺服区域与具有多个并行访问的轨道中的任何一个的具有蛇形磁道扫描的数据磁道区域交错
    • US5432652A
    • 1995-07-11
    • US75625
    • 1993-06-14
    • Wayne T. ComeauxDavid C. GravesDouglas W. Johnson
    • Wayne T. ComeauxDavid C. GravesDouglas W. Johnson
    • G11B5/09G11B5/55G11B5/584G11B20/12
    • G11B5/5508G11B5/584
    • A magnetic tape has three evenly spaced-apart longitudinally-extending servo track areas. Four equal-sized longitudinally-extending data track areas are disposed between said servo track areas and between longitudinal edges of the tape and one of said longitudinally-extending data track areas. For track following, all servo track areas are simultaneously sensed for producing one head positioning signal. Data tracks are arranged into four groups of tracks, one-half of the data tracks in each group are concurrently accessed. The data tracks on the tape are arranged in clusters. Each cluster has one track from each of the groups of tracks. Two laterally-adjacent track clusters constitute four data track wraps for serpentine scanning of data tracks. The concurrent track accessing respectively occurs in first and second halves of a data track wrap (there is a number of wraps equal to one half the number of track clusters). Each servo area indicates two lateral positions of the tape to the head. The lateral spacing between the lateral positions is equal to about a data track width. This arrangement makes the servo areas field writable. The magnetic head has a number of data write and read gaps equal to the number of clusters. A set of four servo gaps are interposed between four groups of write and read gaps and positioned to simultaneously sense all three servo track areas.
    • 磁带具有三个均匀间隔开的纵向延伸的伺服磁道区域。 在所述伺服磁道区域之间以及磁带的纵向边缘和所述纵向延伸的数据磁道区域中的一个之间设置四个等大小的纵向延伸的数据磁道区域。 对于跟踪跟踪,所有伺服磁道区域同时被检测以产生一个磁头定位信号。 数据磁道被布置成四组磁道,每组中的一半数据磁道被同时访问。 磁带上的数据轨道排成簇。 每个群集具有来自每组轨道的一个轨道。 两个横向相邻的轨道簇构成了用于数据轨迹的蛇形扫描的四个数据轨迹包。 并发跟踪访问分别发生在数据轨道包裹的第一和第二半部(存在等于轨道簇数量的一半的卷数)。 每个伺服区域表示磁带到头部的两个横向位置。 横向位置之间的横向间隔等于数据轨迹宽度。 这种布置使伺服区域可写。 磁头具有等于簇数的多个数据写入和读取间隙。 在四组写入和读取间隙之间插入一组四个伺服间隙,并且定位成同时感测所有三个伺服轨迹区域。
    • 6. 发明申请
    • Erasure and Servowriting of Magnetic Storage Media having Perpendicular Anisotropy
    • 具有垂直各向异性的磁存储介质的擦除和伺服
    • US20120314322A1
    • 2012-12-13
    • US13159297
    • 2011-06-13
    • Larold L. OlsonDouglas W. JohnsonMichael P. Sharrock
    • Larold L. OlsonDouglas W. JohnsonMichael P. Sharrock
    • G11B5/584G11B5/78
    • G11B5/584G11B5/00821
    • Magnetic storage tape and techniques for erasing and writing to magnetic storage tape having a perpendicular squareness greater than 50 percent and a longitudinal squareness less than 50 percent are described. In general, the magnetic tape may be biased with a remanence magnetization, or magnetic orientation, in any direction. One or two head systems may use various magnetic field patterns to create the desired remanence magnetization. Servo marks may have a remanence magnetization in an opposite magnetic orientation than that of the remaining bias on the servo track, e.g., substantially perpendicular to the magnetic tape. In some examples, a write head may alternate the direction of the magnetic field to continuously bias and write servo patterns to the magnetic tape. In addition, a symmetrical servo mark may be created in the magnetic tape with a write head having a gap width approximately equal to the length of the servo mark.
    • 描述了用于擦除和写入具有大于50%的垂直矩形度和小于50%的纵向矩形度的磁存储带的磁存储带和技术。 通常,磁带可以以任何方向上的剩余磁化或磁方向偏置。 一个或两个头系统可以使用各种磁场图案来产生期望的剩磁。 伺服标记可以具有与伺服轨道上的剩余偏置相反的磁取向的剩磁磁化,例如基本垂直于磁带。 在一些示例中,写头可以交替磁场的方向以连续地将伺服图案偏置和写入磁带。 此外,可以在磁带中产生对称的伺服标记,其中写头的间隙宽度大约等于伺服标记的长度。
    • 7. 发明申请
    • Erasure of Magnetic Storage Media having Perpendicular Anisotropy
    • 具有垂直各向异性的磁存储介质的擦除
    • US20120314320A1
    • 2012-12-13
    • US13159287
    • 2011-06-13
    • Larold L. OlsonDouglas W. JohnsonMichael P. Sharrock
    • Larold L. OlsonDouglas W. JohnsonMichael P. Sharrock
    • G11B5/78G11B21/10
    • G11B5/584G11B5/00813G11B5/78
    • Magnetic storage tape and techniques for erasing and writing to magnetic storage tape having a perpendicular squareness greater than 50 percent and a longitudinal squareness less than 50 percent are described. In general, the magnetic tape may be biased with a remanence magnetization, or magnetic orientation, in any direction. One or two head systems may use various magnetic field patterns to create the desired remanence magnetization. Servo marks may have a remanence magnetization in an opposite magnetic orientation than that of the remaining bias on the servo track, e.g., substantially perpendicular to the magnetic tape. In some examples, a write head may alternate the direction of the magnetic field to continuously bias and write servo patterns to the magnetic tape. In addition, a symmetrical servo mark may be created in the magnetic tape with a write head having a gap width approximately equal to the length of the servo mark.
    • 描述了用于擦除和写入具有大于50%的垂直矩形度和小于50%的纵向矩形度的磁存储带的磁存储带和技术。 通常,磁带可以以任何方向上的剩余磁化或磁方向偏置。 一个或两个头系统可以使用各种磁场图案来产生期望的剩磁。 伺服标记可以具有与伺服轨道上的剩余偏置相反的磁取向的剩磁磁化,例如基本垂直于磁带。 在一些示例中,写头可以交替磁场的方向以连续地将伺服图案偏置和写入磁带。 此外,可以在磁带中产生对称的伺服标记,其中写头的间隙宽度大约等于伺服标记的长度。
    • 8. 发明授权
    • Distributed servo patterns for data storage media
    • 用于数据存储介质的分布式伺服模式
    • US07889454B2
    • 2011-02-15
    • US12291703
    • 2008-11-13
    • Douglas W. JohnsonJames S. AndersonDavid A. GobranDenis J. Langlois
    • Douglas W. JohnsonJames S. AndersonDavid A. GobranDenis J. Langlois
    • G11B5/584G11B5/09
    • G11B5/584
    • The invention is directed to a data storage medium that includes a plurality of servo bands distributed across the data storage medium and a plurality of data tracks positioned between each of the plurality of distributed servo bands. The data storage medium comprises a servo band pitch of less than 200 micrometers. The large number of servo bands distributed across the data storage medium with a relatively small servo band pitch reduces the influence of media dimensional instability. In this way, the invention may substantially increase data read head positioning accuracy, especially in the case of narrow track widths. A read head array arranged in a two-dimensional matrix that includes a first servo read head, a second servo read head, and a plurality of data read heads positioned between the first and second servo read heads may be applied to a data storage medium as described herein.
    • 本发明涉及一种数据存储介质,其包括分布在数据存储介质上的多个伺服带和位于多个分布式伺服带中的每一个之间的多个数据磁道。 数据存储介质包括小于200微米的伺服带间距。 分布在具有相对小的伺服频带节距的数据存储介质上的大量伺服频带减少了介质尺寸不稳定性的影响。 以这种方式,本发明可以显着增加数据读取头定位精度,特别是在窄轨道宽度的情况下。 布置在包括第一伺服读取头,第二伺服读取头和位于第一和第二伺服读取头之间的多个数据读取头的二维矩阵中的读取头阵列可以作为 在此描述。
    • 10. 发明授权
    • Data storage tape recertification
    • 数据存储磁带重新认证
    • US07835108B2
    • 2010-11-16
    • US11824338
    • 2007-06-28
    • Douglas W. JohnsonYung Yip
    • Douglas W. JohnsonYung Yip
    • G11B5/584
    • G11B5/0083G11B5/584
    • The invention is directed to techniques for erasing data storage tape for reuse. In an embodiment, an erase head module for erasing data storage tape comprises a set of erase gaps and one or more servo read elements. The set of erase gaps is configured to coincide with data bands of the data storage tape to allow erasure of only the data bands of the data storage tape while not erasing servo bands of the data storage tape. The one or more servo read elements detect one of the servo bands of the data storage tape when the set of erase gaps are proximate the data bands of the data storage tape to allow the erase head module to accurately track the data bands with the set of erase gaps.
    • 本发明涉及擦除用于重用的数据存储带的技术。 在一个实施例中,用于擦除数据存储带的擦除头模块包括一组擦除间隙和一个或多个伺服读取元件。 该组擦除间隙被配置为与数据存储带的数据带一致,以便仅擦除数据存储带的数据带,同时不擦除数据存储带的伺服带。 当该组擦​​除间隙靠近数据存储带的数据带时,一个或多个伺服读取元件检测数据存储带的伺服带中的一个,以允许擦除头模块准确地跟踪数据带的集合 消除差距。