公开(公告)号：US5356088A

公开(公告)日：1994-10-18

申请号：US979639

申请日：1992-11-20

申请人： Shinobu Fujisawa ,  Kazuhiko Nakagawara

发明人： Shinobu Fujisawa ,  Kazuhiko Nakagawara

IPC分类号： B65H23/18 ,  G11B15/43 ,  G11B15/54 ,  B65H23/192

CPC分类号： G11B15/43 ,  B65H23/1806 ,  G11B15/54

摘要： A cassette tape transport has a tape speed control servo for driving either of a pair of tape drive motors at constant speed in response to tape speed pulses from a tape speed sensor. Upon development of a tape slack, as manifested by a decrease in the recurrence rate of the tape speed pulses, the tape speed control servo is overridden, and the pair of drive motors are simultaneously energized for rotating the cassette reels in opposite directions, thereby stretching the tape between the reels until the slack is removed. The tape transport has a microcomputer which may be factory preprogrammed to include a slack takeup routine. The microcomputer starts the slack takeup routine not only upon decrease in the recurrence rate of the tape speed pulses but also when the tape cassette is loaded in the tape transport and when no tape speed pulse is produced for a predetermined length of time.

摘要翻译： 盒式磁带传输具有带速度控制伺服器，用于响应于来自磁带速​​度传感器的磁带速度脉冲以恒定速度驱动一对磁带驱动电机中的任一个。 在磁带松弛的发展中，如由带速度脉冲的复现率的降低所表现的那样，磁带速度控制伺服被覆盖，并且一对驱动电机同时被激励以使磁带盘在相反的方向上旋转，从而拉伸 卷轴之间的磁带直到松弛被移除。 磁带传送器具有可以在工厂预编程以包括松弛收起程序的微型计算机。 微型计算机不仅在磁带速度脉冲的再现速率降低时，而且当磁带盒被装载在磁带传送器中以及当在预定长度的时间内没有产生磁带速度脉冲时，启动松弛卷取程序。

公开(公告)号：US5464167A

公开(公告)日：1995-11-07

申请号：US87610

申请日：1993-07-07

申请人： Shinobu Fujisawa ,  Kazuhiko Nakagawara

发明人： Shinobu Fujisawa ,  Kazuhiko Nakagawara

IPC分类号： G11B15/00 ,  G11B15/43 ,  G11B15/46 ,  B65H59/38 ,  G03B21/50 ,  G11B23/42

CPC分类号： G11B15/46 ,  G11B15/43

摘要： A tape transport is disclosed which is for use with a magnetic tape cassette. Under some specific thermal conditions the tape cassette may develop gaps between the reel hubs and the tape rolls thereon, such gaps being likely to lead to the jamming of the tape through the hunting of a tape speed control servo built into the tape transport. Therefore, for removing the gaps, the reels are successively rotated in a direction for winding up the tape, after the tape cassette has been loaded in the tape transport and before reading or writing. Preferably, the pair of reels are simultaneously rotated in opposite directions for taking up a possible tape slack between the reels prior to gap removal.

摘要翻译： 公开了一种用于磁带盒的磁带传输。 在一些特定的热条件下，带盒可能在卷轴轮毂和其上的带卷之间形成间隙，这样的间隙可能通过内置在带传送器中的带速度控制伺服器的捕获而导致带的卡住。 因此，为了去除间隙，在将磁带盒装载到磁带传送装置中之后并且在读取或写入之前，卷轴在卷绕磁带的方向上依次旋转。 优选地，一对卷轴同时沿相反的方向旋转，以在间隙移除之前卷起卷筒之间的可能的带松弛。

公开(公告)号：US5287229A

公开(公告)日：1994-02-15

申请号：US750816

申请日：1991-08-27

申请人： Shuichi Saito ,  Tatsuo Mori ,  Kazuhiko Nakagawara

发明人： Shuichi Saito ,  Tatsuo Mori ,  Kazuhiko Nakagawara

IPC分类号： G11B5/29 ,  G11B15/04 ,  G11B15/05 ,  G11B15/087 ,  G11B27/36

CPC分类号： G11B27/36 ,  G11B15/04

摘要： A method of writing on successive track locations on a magnetic multitrack recording tape so as to avoid accidental overwriting. Preparatory to writing on each track location, the peak amplitude value is derived from the output from a read head scanning prescribed initial part of that track location. The peak value is then compared with a reference value in order to determine whether the tape bears any prewritten information on the track location. Writing on each track location is permitted if the tape has proved to bear no prewritten information thereon, and inhibited if otherwise.

摘要翻译： 一种写在磁性多轨录音带上的连续轨道位置的方法，以避免意外重写。 准备在每个轨道位置写入，峰值振幅值是从读取头扫描规定的该轨道位置的初始部分的输出导出的。 然后将峰值与参考值进行比较，以便确定磁带是否在轨道位置上承载任何预先写入的信息。 如果磁带已经证明不存在任何预先写入的信息，则允许在每个轨道位置上写入，否则将被禁止。

公开(公告)号：US5978166A

公开(公告)日：1999-11-02

申请号：US278938

申请日：1994-07-22

申请人： Kazuhiko Nakagawara ,  Nobuki Matsui ,  Hideaki Saga

发明人： Kazuhiko Nakagawara ,  Nobuki Matsui ,  Hideaki Saga

IPC分类号： G11B5/48 ,  G11B21/10 ,  G11B5/00

CPC分类号： G11B5/4893 ,  G11B21/10

摘要： An apparatus for positioning at least one magnetic head relative to a magnetic tape for recording and reproducing information includes a head unit for holding at least one magnetic head and a moving unit for moving the head unit parallel to a surface of the magnetic tape in a direction along the width of the magnetic tape so that the head unit is kept at a constant angle relative to the surface of the magnetic tape.

摘要翻译： 用于相对于用于记录和再现信息的磁带定位至少一个磁头的装置包括：头单元，用于保持至少一个磁头和移动单元，用于使头单元平行于磁带表面沿方向移动 沿着磁带的宽度，使得头单元相对于磁带的表面保持恒定的角度。

公开(公告)号：US5416642A

公开(公告)日：1995-05-16

申请号：US227179

申请日：1994-04-13

申请人： Kazuhiko Nakagawara ,  Shuichi Saito ,  Tatsuo Mori

发明人： Kazuhiko Nakagawara ,  Shuichi Saito ,  Tatsuo Mori

IPC分类号： G11B5/02 ,  G11B5/035 ,  G11B5/09 ,  G11B5/41 ,  G11B20/10 ,  G11B20/18 ,  G11B23/50 ,  G11B27/36

CPC分类号： G11B5/035 ,  G11B20/10009 ,  G11B20/10027 ,  G11B20/182 ,  G11B23/502 ,  G11B27/36 ,  G11B5/41

摘要： A method of controlling the gain of a read amplifier preparatory to writing data on a length of multitrack magnetic tape, by writing and reading in a read-while-write mode a reference pattern on the tape immediately when the tape starts running. The gain of the read amplifier is automatically controlled so that the output therefrom, representative of the reference pattern read on the tape, may have a magnitude within a predetermined range. The gain control procedure is retried up to a predetermined number of, say, fifteen if the output magnitude of the read amplifier fails to come up to the predetermined range. If the failure in gain control is due to dust accumulation on the tape or on the transducer, the reference pattern is increasingly more likely to be written and read properly during the retries because the dust may be removed by relative sliding motion between the tape and the transducer.

摘要翻译： 一种控制读取放大器的增益的方法，其通过在磁带读写模式下在磁带开始运行时立即在磁带上写入和读取参考图形来准备在多轨磁带的长度上写入数据。 读取放大器的增益被自动控制，使得代表在磁带上读取的参考图形的输出可以具有在预定范围内的幅度。 如果读取放大器的输出幅度不能达到预定范围，则增益控制过程重新调到预定数量，例如十五。 如果增益控制失败是由于磁带或传感器上的灰尘积聚引起的，在重试期间，参考图案越来越有可能被正确写入和读取，因为灰尘可以通过磁带与磁带之间的相对滑动来移除 传感器。

公开(公告)号：US5859741A

公开(公告)日：1999-01-12

申请号：US646028

申请日：1996-05-07

申请人： Kazuhiko Nakagawara ,  Nobuki Matsui ,  Hideaki Saga

发明人： Kazuhiko Nakagawara ,  Nobuki Matsui ,  Hideaki Saga

IPC分类号： G11B5/48 ,  G11B21/10

CPC分类号： G11B5/4893 ,  G11B21/10

摘要： An apparatus for positioning at least one magnetic head relative to a magnetic tape for recording and reproducing information includes a head unit for holding at least one magnetic head and a moving unit for moving the head unit parallel to a surface of the magnetic tape in a direction along the width of the magnetic tape so that the head unit is kept at a constant angle relative to the surface of the magnetic tape.

摘要翻译： 用于相对于用于记录和再现信息的磁带定位至少一个磁头的装置包括：头单元，用于保持至少一个磁头和移动单元，用于使头单元平行于磁带表面沿方向移动 沿着磁带的宽度，使得头单元相对于磁带的表面保持恒定的角度。

公开(公告)号：US5436774A

公开(公告)日：1995-07-25

申请号：US232868

申请日：1994-04-25

申请人： Kazuhiko Nakagawara ,  Shuichi Saito ,  Tatsuo Mori

发明人： Kazuhiko Nakagawara ,  Shuichi Saito ,  Tatsuo Mori

IPC分类号： G11B5/41 ,  G11B5/008 ,  G11B15/087 ,  G11B27/22 ,  G11B27/30 ,  G11B15/44

CPC分类号： G11B5/00813 ,  G11B15/087 ,  G11B27/22 ,  G11B27/3027

摘要： A method of reading a length of multitrack magnetic tape on which data is written on each track in the form of a succession of blocks, with each data block carrying a block marker. While data on each track is being read by a transducer, the output therefrom is monitored for detecting a possible blank on the track from the block markers. The tape is stopped, rewound, and paid off again when a possible blank is detected, in order to retry reading of the detected possible blank. If the detected possible blank is due to dust accumulation on the tape or on the transducer, data written thereon may be read during the retry. Reading is discontinued if no block marker is detected during the retry. Reading of a detected possible blank may be retried only at a starting part of each track, where dust is particularly easy to accumulate, or throughout each track.

摘要翻译： 读取一长度的多轨磁带的方法，其中数据以一系列块的形式写在每个轨道上，每个数据块都带有块标记。 当每个轨道上的数据被换能器读取时，监视其输出，以从块标记检测轨道上的可能的空白。 当检测到可能的空白时，磁带被停止，重新卷绕并再次清除，以便重新读取检测到的可能的空白。 如果检测到的可能的空白是由于磁带或传感器上的灰尘积聚造成的，则可能会在重试期间读取写在其上的数据。 如果在重试期间没有检测到块标记，读取将被停止。 可以仅在每个轨道的起始部分重新检测到可能的空白，其中灰尘特别容易积聚，或遍及每个轨道。