公开(公告)号：US06781778B1

公开(公告)日：2004-08-24

申请号：US09906378

申请日：2001-07-16

申请人： Richard W. Molstad ,  Douglas W. Johnson ,  Durkee B. Richards

发明人： Richard W. Molstad ,  Douglas W. Johnson ,  Durkee B. Richards

IPC分类号： G11B509

CPC分类号： G11B5/584 ,  G11B5/09 ,  G11B5/59655

摘要： The invention combines the benefits of sectored servo data with the benefits of time-based servo data. Recording media such as magnetic tape, magnetic disks, optical tape and optical disks can store servo data in a time-based sectored servo format.

摘要翻译： 本发明将分段伺服数据的优点与基于时间的伺服数据的优点相结合。 诸如磁带，磁盘，光带和光盘之类的记录介质可以以基于时间的扇区伺服格式存储伺服数据。

公开(公告)号：US07031097B1

公开(公告)日：2006-04-18

申请号：US10775884

申请日：2004-02-10

申请人： Richard W. Molstad ,  Douglas W. Johnson ,  Yung Yip

发明人： Richard W. Molstad ,  Douglas W. Johnson ,  Yung Yip

IPC分类号： G11B5/584

CPC分类号： G11B5/584

摘要： Servopositioning data is written onto a linear recording medium such that a position error signal (PES) is intentionally created. The signal substantially resembles a conventional time based servo pattern, but is insensitive to transverse position. In a preferred embodiment, the signal at a zero-azimuth, i.e., an angle sufficiently small in value such that there is no significant PES signal associated with the transverse motion.

摘要翻译： 伺服定位数据被写入线性记录介质，从而有意创建位置误差信号（PES）。 信号基本上类似于传统的基于时间的伺服模式，但对横向位置不敏感。 在优选实施例中，在零方位角处的信号，即具有足够小的值的角度使得不存在与横向运动相关联的显着PES信号。

公开(公告)号：US06542325B1

公开(公告)日：2003-04-01

申请号：US09265789

申请日：1999-03-10

申请人： Richard W. Molstad ,  Michael J. Kelly ,  Douglas W. Johnson

发明人： Richard W. Molstad ,  Michael J. Kelly ,  Douglas W. Johnson

IPC分类号： G11B5584

CPC分类号： G11B5/5926 ,  G11B5/584

摘要： A servo track configuration includes at least one servo track having a width. A servo pattern is repeatedly recorded in the at least one servo track. Repeatedly recording the servo pattern includes repeating the simultaneous recording of first and second reference pattern lines and a track pattern line in the at least one servo track. Each of the first and second reference pattern lines has an identical predetermined geometry and extends across the width of the at least one servo track. Further, the track pattern line has a predetermined geometry that is different than the predetermined geometry of the first and second reference pattern lines and extends across the width of the at least one servo track.

摘要翻译： 伺服轨道配置包括具有宽度的至少一个伺服轨道。 伺服图案被重复记录在至少一个伺服轨道中。 重复地记录伺服模式包括在至少一个伺服轨道中重复同时记录第一和第二参考图案线和轨迹图案线。 第一和第二参考图案线中的每一个具有相同的预定几何形状并且延伸跨越至少一个伺服轨道的宽度。 此外，轨道图案线具有与第一和第二参考图案线的预定几何形状不同的预定几何形状，并且跨越至少一个伺服轨道的宽度延伸。

公开(公告)号：US6078481A

公开(公告)日：2000-06-20

申请号：US93224

申请日：1998-06-08

申请人： William J. Vanderheyden ,  Douglas W. Johnson ,  Richard W. Molstad

发明人： William J. Vanderheyden ,  Douglas W. Johnson ,  Richard W. Molstad

IPC分类号： G11B23/087 ,  G11B23/02 ,  G11B5/78

CPC分类号： G11B23/087

摘要： A tape cartridge includes a first rotatable hub and a second rotatable hub and a tape head receiving region. A flexible recording tape is wound upon the first rotatable hub and the second rotatable hub. The flexible recording tape is routed through the cartridge to provide two levels or layers of tape at the tape head receiving region. The tape path may include a flexible tape routed through the cartridge to provide two levels of tape at least one of the tape guides or tape pins within the tape cartridge. Of course the tape path through the tape cartridge may also include the tape head. At startup the tape always driven in the same direction so that the layer of tape underneath the other layer of tape is initially placed in tension. This prevents binding of one layer with respect to the second layer at startup. If the initial startup direction is opposite from the desired direction, the direction of the tape is reversed within the tape cartridge. A tape for use in a tape drive including a double loop type tape path includes a substrate having a magnetic layer applied to one side of the substrate, and having a backside of soft magnetic material applied to the other side of the substrate. The backside acts as a magnetic shield to prevent writing though the layer of tape nearest the head to the layer of tape underneath the layer of tape being written to.

摘要翻译： 带盒包括第一可旋转轮毂和第二可旋转轮毂和带头接收区域。 柔性记录带卷绕在第一可旋转轮毂和第二可旋转轮毂上。 柔性记录带路由通过盒，以在磁带头接收区域提供两层或多层磁带。 磁带路径可以包括通过盒带路由的柔性带，以在带盒内的至少一个带引导件或带引脚提供两层带。 当然，通过磁带盒的磁带路径也可以包括磁带头。 在启动时，磁带总是沿相同的方向驱动，使得另一层磁带下方的磁带层最初处于张紧状态。 这防止了启动时一层相对于第二层的粘结。 如果初始启动方向与所需方向相反，则带的方向在带盒内相反。 用于包括双环型磁带路径的磁带驱动器的磁带包括具有施加到基板的一侧的磁性层并具有施加到基板的另一侧的软磁材料的背面的基板。 背面充当磁性屏蔽，以防止将最靠近磁头的磁带层写入写入的磁带层下面的磁带层。

公开(公告)号：US20120314322A1

公开(公告)日：2012-12-13

申请号：US13159297

申请日：2011-06-13

申请人： Larold L. Olson ,  Douglas W. Johnson ,  Michael P. Sharrock

发明人： Larold L. Olson ,  Douglas W. Johnson ,  Michael P. Sharrock

IPC分类号： G11B5/584 ,  G11B5/78

CPC分类号： G11B5/584 ,  G11B5/00821

摘要： 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.

摘要翻译： 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。

公开(公告)号：US20120314320A1

公开(公告)日：2012-12-13

申请号：US13159287

申请日：2011-06-13

申请人： Larold L. Olson ,  Douglas W. Johnson ,  Michael P. Sharrock

发明人： Larold L. Olson ,  Douglas W. Johnson ,  Michael P. Sharrock

IPC分类号： G11B5/78 ,  G11B21/10

CPC分类号： G11B5/584 ,  G11B5/00813 ,  G11B5/78

摘要： 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.

摘要翻译： 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。

公开(公告)号：US07889454B2

公开(公告)日：2011-02-15

申请号：US12291703

申请日：2008-11-13

申请人： Douglas W. Johnson ,  James S. Anderson ,  David A. Gobran ,  Denis J. Langlois

发明人： Douglas W. Johnson ,  James S. Anderson ,  David A. Gobran ,  Denis J. Langlois

IPC分类号： G11B5/584 ,  G11B5/09

CPC分类号： G11B5/584

摘要： 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.

摘要翻译： 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。

公开(公告)号：US07878745B2

公开(公告)日：2011-02-01

申请号：US12424728

申请日：2009-04-16

申请人： Anthony A. Allen ,  Don Hinson ,  John M. Kosidlo ,  Douglas W. Johnson ,  Troy D. Carman

发明人： Anthony A. Allen ,  Don Hinson ,  John M. Kosidlo ,  Douglas W. Johnson ,  Troy D. Carman

IPC分类号： F16B37/02 ,  B65D85/24

CPC分类号： F16B37/043 ,  F16B27/00

摘要： A stackable U-nut fastener includes first and second spaced arms and a folded edge portion interconnecting the arms. A plurality of U-nut fasteners can be engaged one with another to form a collated strip of fasteners. A collating tab from one arm of one U-nut fasteners engages an opening in an arm of an adjacent U-nut fastener.

摘要翻译： 可堆叠的U形螺母紧固件包括第一和第二间隔开的臂和互连臂的折叠边缘部分。 多个U形螺母紧固件可以彼此接合以形成整齐的紧固件条。 来自一个U形螺母紧固件的一个臂的整理翼片与相邻U形螺母紧固件的臂中的开口接合。

公开(公告)号：US07835108B2

公开(公告)日：2010-11-16

申请号：US11824338

申请日：2007-06-28

申请人： Douglas W. Johnson ,  Yung Yip

发明人： Douglas W. Johnson ,  Yung Yip

IPC分类号： G11B5/584

CPC分类号： G11B5/0083 ,  G11B5/584

摘要： 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.

摘要翻译： 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。

公开(公告)号：US20080024905A1

公开(公告)日：2008-01-31

申请号：US11497185

申请日：2006-07-31

申请人： Douglas W. Johnson ,  Denis J. Langlois

发明人： Douglas W. Johnson ,  Denis J. Langlois

IPC分类号： G11B5/584

CPC分类号： G11B5/584

摘要： The invention is directed to techniques for storing information on a linear data storage medium, such as magnetic tape. According to the invention, a write head array concurrently writes a plurality of data tracks and at least one servo track onto the magnetic tape. In this way, the servo track is integrated between the data tracks. The servo track may, for instance, be located in the middle of a data band, and may span a distance corresponding to two data tracks. By concurrently writing the servo track with the data tracks, track misregistration (TMR) can be reduced or eliminated during the write operation.