公开(公告)号：WO1995013606A1

公开(公告)日：1995-05-18

申请号：PCT/US1994012932

申请日：1994-11-10

Applicant: EXABYTE CORPORATION

Inventor： EXABYTE CORPORATION ,  HUGUES, Timothy, C. ,  ABOU-JAOUDE, Fadi, Y.

IPC: G11B05/00

CPC classification number: G11B15/1875 ,  G11B5/0086 ,  G11B5/4893 ,  G11B5/531 ,  G11B5/534 ,  G11B15/026 ,  G11B15/20 ,  G11B15/4671 ,  G11B15/4672 ,  G11B15/4673 ,  G11B15/4677 ,  G11B15/4678 ,  G11B15/4736 ,  G11B15/602 ,  G11B27/032 ,  G11B27/036 ,  G11B27/13 ,  G11B27/36 ,  G11B33/10 ,  G11B2220/90

Abstract: Methods of calibrating a helical scan recorder (20, 20') include transporting a storage media (22, 22') past a drum (30, 30') at a controlled linear velocity and recording tracks on the media using a write head (W2, W2'). During a read-after-write operation, servo signals recorded on the traks are read. The servo signals from the tracks are used to determine an axial offset variance (AOV) of the write head (W2, W2') and a read head (R2, R2') on the drum. In one mode, calibration is achieved for a helical scan recorder (20') having a capstan (142') and wherein the tracks are read back within 180 degrees of recordation. In another mode, calibration is achieved for a helical scan recorder which does not have a capstan, and wherein the tracks are read back at least 540 degrees after recordation. The axial offset variance is used in a write splice operation and, in one mode, to determine linear velocity of the media.

Abstract translation: 校准螺旋扫描记录器（20,20'）的方法包括以受控的线速度传送存储介质（22,22'）经过滚筒（30,30'），并使用写入头（W2 ，W2'）。 在读写操作期间，读取记录在轨道上的伺服信号。 来自轨道的伺服信号用于确定磁头上的写头（W2，W2'）和读头（R2，R2'）的轴向偏移方差（AOV）。 在一种模式中，对于具有绞盘（142'）的螺旋扫描记录器（20'）实现了校准，并且其中轨迹在180度记录中被读回。 在另一种模式中，对于不具有绞盘的螺旋扫描记录器实现了校准，并且其中轨迹在记录之后至少回读540度。 轴向偏移方差用于写接头操作，并且在一种模式下用于确定介质的线速度。

公开(公告)号：WO1991000593A1

公开(公告)日：1991-01-10

申请号：PCT/EP1990000746

申请日：1990-05-09

Applicant: SIEMENS AKTIENGESELLSCHAFT ,  SCHEWE, Herbert ,  STEPHANI, Dietrich

Inventor： SIEMENS AKTIENGESELLSCHAFT

IPC: G11B05/00

CPC classification number: G11B5/00 ,  G11B5/66

Abstract: The data storage device (2) comprises a substrate (A) with a storage layer (4) and a magnetic head (K) with two magnetic arms (7, 8). Each magnetic arm has a magnetic layer (7a, 8a) forming a magnetic pole (P1, P2) and a magnetic reinforcing layer (7b, 8b) outside the pole region. Here, the reinforcing layers (7b, 8b) represent parts of the outsides of the head (K). In addition, the head (K) is so arranged that it records virtually only with its leading magnetic arm (7). According to the invention, the storage layer (4) is applied to a weakly magnetised sub-layer (5) of thickness Du and magnetic saturation MSu so that Du * MSu >/= 1.2 * D1 * MS1, where D1 is the thickness and MS1 the magnetic saturation of the magnetic layer (7a) of the leading magnetic arm (7).

Abstract translation: 数据存储装置（2）包括具有存储层（4）的基板（A）和具有两个磁臂（7,8）的磁头（K）。 每个磁臂具有在极区外部形成磁极（P1，P2）和磁性增强层（7b，8b）的磁性层（7a，8a）。 这里，加强层（7b，8b）表示头部（K）的外侧的一部分。 另外，磁头（K）被布置成使得其仅实际记录其前导磁臂（7）。 根据本发明，将存储层（4）施加到厚度为Du和磁饱和度MSu的弱磁化子层（5），使得Du * MSu> / = 1.2 * D1 * MS1，其中D1是厚度， MS1是引导磁臂（7）的磁性层（7a）的磁饱和度。

公开(公告)号：WO1986006862A1

公开(公告)日：1986-11-20

申请号：PCT/US1986000821

申请日：1986-04-23

Applicant: EASTMAN KODAK COMPANY

Inventor： EASTMAN KODAK COMPANY ,  MC CLURE, Richard, John

IPC: G11B05/00

CPC classification number: G11B5/58 ,  G11B15/602 ,  G11B17/32 ,  G11B27/32

Abstract: An extremely narrow control track (15) is provided. By recording such control track cross-wise with respect to data recorded in an adjacent information track (8), a flux sensitive head (34, 36) may be employed to read the recorded control track flux so as to detect, with great sensitivity, polarized flux directions on either side of the centerline of the control track. Such detected polarized flux directions are transformed into corresponding drive signals for corrective head (and/or medium) positioning, thereby to cause the flux sensitive head to follow the centerline of the control track.

Abstract translation: 提供非常窄的控制轨道（15）。 通过相对于在相邻信息轨道（8）中记录的数据进行横向记录这样的控制轨迹，可以采用磁通敏感磁头（34,36）来读取记录的控制磁道通量，以便以极高的灵敏度检测， 控制轨道中心线两侧的极化通量方向。 这种检测到的极化通量方向被转换成用于校正头（和/或介质）定位的相应的驱动信号，从而使通量敏感头跟随控制轨道的中心线。

公开(公告)号：EP0159039A3

公开(公告)日：1988-01-07

申请号：EP85104722

申请日：1985-04-18

Applicant: HITACHI, LTD.

Inventor： Otomo, Shigekazu ,  Kumasaka, Noriyuki ,  Yamashita, Takeo ,  Morikawa, Juichi ,  Kobayashi, Takayuki ,  Kudo, Mitsuhiro

IPC: G11B05/00 ,  G11B05/127 ,  G11B05/48

CPC classification number: G11B5/1875 ,  G11B5/1274

Abstract: @ A magnetic recording and reproducing system uses a composite magnetic head whose surface (6) facing a magnetic recording medium is composed primarily of a ferromagnetic metal (4) and a high permeability ferrite single crystal (3), and which has a region close to a gap (7) and composed of the ferromagnetic metal (4). The magnetic head is arranged in such a fashion that the {710} plane of the ferrite single crystal (3) substantially coincides with a plane (8) forming a principal magnetic circuit of the magnetic head, that the direction lying inside the {110} plane is inclined at an angle of 15° to 75° with respect to a direction perpendicular to the surface (6) facing the recording medium, and that the recording medium travels in a direction which is relatively the same as, and parallel to, a vector formed by projecting a vector extending from the inside to the outside of the surface (6) facing the recording medium in the direction, on the surface (6) facing the magnetic recording medium. By this arrangement, the step occurring on the surface (6) facing the recording medium due to wear caused by the travel of the recording medium, and any output deterioration and fluctuation resulting from the step can be remarkably reduced.

公开(公告)号：EP0097836A3

公开(公告)日：1986-06-25

申请号：EP83105441

申请日：1983-06-01

Applicant: International Business Machines Corporation

Inventor： Franaszek, Peter Anthony Watson Research Center ,  Yarmchuk, Edward John

IPC: G11B05/00 ,  G03G19/00 ,  B41J03/00

CPC classification number: B41J2/43 ,  G11B5/1272 ,  G11B5/17 ,  G11B5/488

Abstract: The drawing diagrammatically illustrates the lay-out of a head array. The array comprises 64 sub-arrays, only sub-arrays B1 and B64 being shown. The sub-array 81 comprises 64 heads, each had being represented by two pole pieces, shows as square dots. 64 word lines (not shown) linkthe pole pieces, the first word line linking cores 63, 64; the second 61, 62; and the last cores 1, 2. A single bit line links the 64 cores in sub-array B1. The bit line is linked with odd numbered cores in one sense and with even numbered cores in the opposite sense. A pole piece is uniquely selected by energising the appropriate word line and then pulsing the bit line with a positive or negative pulse to select one or other of the two cores conditioned by the word line. The heads in each column are staggered in the x-direction so that when a recording is made by relative movement in the y-direction, the magnetic spot recorded by a head e.g. head 57 is contiguous with the magnetic spot recorded by the next consecutive head in the column. Further the magnetic spot recorded by the first head in each subsequent sub-array is contiguous with the magnetic spot recorded by the last head of the preceding sub-array.

Abstract translation: 该图示意性地图示了头部阵列的布局。 该阵列包括64个子阵列，只显示了子阵列B1和B64。 子阵列81包括64个磁头，每个磁头由两个极片代表，表示为方形点。 64条字线（未示出）连接极片，第一字线连接芯63,64; 第二个61,62; 和最后的核1,2。单个位线连接子阵列B1中的64个核。 位线在一种意义上与奇数编号的核心相连，偶数编号的核心在相反意义上相连。 通过激励适当的字线，然后用正脉冲或负脉冲脉动位线来选择磁极片，以选择由字线调节的两个核心中的一个或另一个。 每列中的头在x方向上交错排列，从而当通过在y方向上的相对运动进行记录时，由头记录的磁点例如， 头部57与由列中的下一个连续头部记录的磁性点邻接。 此外，由每个后续子阵列中的第一个磁头记录的磁点与由前一个子阵列的最后一个磁头记录的磁点邻接。

公开(公告)号：EP0099127A3

公开(公告)日：1986-02-12

申请号：EP83106921

申请日：1983-07-14

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Sawazaki, Norikazu

IPC: G11B05/00 ,  G11B05/33 ,  G11B05/62 ,  G11B05/127

CPC classification number: G11B5/1278 ,  G11B5/00 ,  G11B5/33 ,  G11B5/332 ,  G11B5/62

Abstract: A magnetic material (1b-2) whose high frequency characteristics vary in response to a signal field recorded on a magnetic recording medium (1) is provided as a magnetic layer in a high frequency coupling circuit including the magnetic recording medium (1) and a reproduction head (5). The coupling degree of the high frequency coupling circuit noticeably varies with the change of the high frequency characteristics of the magnetic material (1b-2), thereby enabling the reproduction of the recorded signal by utilizing the change of the high frequency characteristics.

公开(公告)号：EP0055819A3

公开(公告)日：1983-01-26

申请号：EP81109369

申请日：1981-10-30

Applicant: International Business Machines Corporation

Inventor： Economy, James ,  Flandera, Mary Ann

IPC: B05D07/00 ,  G11B05/00 ,  B05D05/00

CPC classification number: B05D7/24 ,  G11B5/84

Abstract: The invention relates to a method of providing a flat and smooth layer of polymeric material on a substrate. The prepolymeric material employed in the method according to the invention, when melted, has a viscosity enabling it to flow into all crevices and voids on the surface of said substrate. The method includes the steps of applying a uniform coating of the prepolymer material on said substrate and heating the substrate to melt said prepolymer, whereby said prepolymeric flows on the surface of said substrate to provide a layer of said prepolymeric material having a flat top surface. Subsequent heating cures the prepolymer to form a flat and smooth layer of polymeric material.

公开(公告)号：WO1997010590A1

公开(公告)日：1997-03-20

申请号：PCT/EP1996004648

申请日：1996-10-25

Applicant: ZANETTI, Giancarlo

IPC: G11B05/00

CPC classification number: G11B20/0021 ,  G11B5/00 ,  G11B5/00808 ,  G11B5/02 ,  G11B20/00086 ,  G11B20/08

Abstract: A method for recording and playing back an audio and/or video signal (and associated recording and playback apparatus, comprises: A) converting an audio and/or video signal into a first series of samples, achieved by sampling at a predetermined frequency and writing to a read/write memory (46), B) forming, by the later reading of the samples from memory at a frequency that is different from that of writing and is possibly variable, a recording on a magnetic strip (43) associated with a succession of timing marks (34) which identify recording blocks and a predetermined time T for playback of each block, C) obtaining, by reading the recording and the associated succession of timing marks, a second series of samples which are written to the memory in order, and a timing signal, D) applying the second series of samples read from the memory in an order correlated with that of writing, through a filter, to a transducer, the sampling frequency of the recording or reading of the samples from memory, which varies over time, being determined by the timing signal, in such a way that each recording block is played back in the time T.

Abstract translation: 一种用于记录和重放音频和/或视频信号的方法（以及相关联的记录和播放装置，包括：A）将音频和/或视频信号转换成通过以预定频率进行采样并写入的第一系列样本 读取/写入存储器（46），B）通过稍后以与写入不同的频率从存储器读取样本并且可能变化，形成与磁带（43）相关联的磁条（43）上的记录 识别记录块的定时标记（34）的连续和用于每个块的重放的预定时间T; C）通过读取记录和相关联的定时标记的顺序获得写入存储器的第二系列样本 顺序和定时信号，D）以与写入相关的顺序将从存储器读取的第二系列样本通过滤波器应用于传感器，从m的记录或读取的采样频率 随着时间的变化，emory由定时信号确定，使得每个记录块在时间T中被重放。

公开(公告)号：WO1994017520A1

公开(公告)日：1994-08-04

申请号：PCT/US1994000712

申请日：1994-01-18

Applicant: CONNER PERIPHERALS, INC.

Inventor： CONNER PERIPHERALS, INC. ,  ANDERSON, Kurt ,  WILSON, Aaron

IPC: G11B05/00

CPC classification number: G11B5/59616 ,  G11B5/5578

Abstract: An apparatus in a dual actuator disk drive system having a nonpackwriting actuator (9) and a packwriting actuator (8) for controlling the sensing of address marks by the transducers (13, 23, 24, 26, 28 and 30) associated with the nonpacking actuator after a switching operation between any two of the transducers (13, 23, 24, 26, 28 and 30) associated with the nonpackwriter actuator (9). The apparatus comprising an address mark means (48) for generating an address mark search signal to start an address mark search when an address mark is expected to be read by the presently selected transducer (13, 23, 24, 26, 28 or 30) associated with said nonpackwriter actuator (9) and an adjusting means (52, 49) connected to said address mark means (48) for altering the time when said address mark means (48) will generate said address mark search signal such that the newly selected transducer (13, 23, 24, 26, 28 or 30) will read the next address mark to occur on the track being read by the newly selected transducer (13, 23, 24, 26, 28 or 30) after said newly transducer (13, 23, 24, 26, 28 or 30) has been selected.

Abstract translation: 一种双致动器盘驱动系统中的装置，具有非包装式致动器（9）和用于通过与非包装相关联的换能器（13,23,24,26,28和30）来控制地址标记的感测的包装驱动器（8） 在与非包装书执行器（9）相关联的任何两个换能器（13,23,24,26和30）之间进行切换操作之后的致动器。 该装置包括地址标记装置（48），用于当希望当前选择的换能器（13,23,24,26,28或30）读取地址标记时，产生地址标记搜索信号以开始地址标记搜索， 与所述非包装书执行器（9）相关联的调节装置（52,49）和连接到所述地址标记装置（48）的调整装置（52,49），用于改变所述地址标记装置（48）将产生所述地址标记搜索信号的时间， 换能器（13,23,24,26,28或30）将在所述新换能器（13,23,24,26,28或30）之后读取由新选择的换能器（13,23,24,26,28或30）读取的轨道上发生的下一个地址标记 13，23，24，26，28或30）。

公开(公告)号：WO1994003889A1

公开(公告)日：1994-02-17

申请号：PCT/RU1993000188

申请日：1993-08-06

Applicant: GODZHAEV, Makhir-Omar Ogly ,  ZEMLYAKOV, Alexandr Jurievich ,  SAVKOV, Nikolai Petrovich

IPC: G11B05/00

CPC classification number: G11B20/08 ,  G11B5/02 ,  G11B20/22

Abstract: The invention relates to recording an audio-information signal on a moving magnetic carrier. A method for magnetic recording consists in that a high frequency biasing signal and the recording signal are fed to the recording head, a control signal is formed by the high frequency biasing current and by means of that signal the high frequency biasing signal is modulated. Additionally a discrete value signal is formed whose frequency is changed by means of said control signal within the frequency range of 40 - 200 kHz. By means of the obtained discrete value signal the pulse width modulation of the information signal is then effected, the combination components of the obtained PWM signal serving as the high frequency biasing current and the low frequency components serving as recording signal, and a feedback signal is formed to the point of the recording signal. A device for magnetic recording comprises, connected to the recording head (1), an amplifying circuit (2) for receiving the information signal and a unit (8) for generating the high frequency biasing signal comprising a generator (9) of the discrete value signal connected to a pulse-width modulator (10), feedback being provided in the device on the basis of the recording signal current. The invention can be used to control the frequency of the HF biasing signal and to reduce the time of passage of the control signal.

Abstract translation: 本发明涉及在移动磁性载体上记录音频信息信号。 一种用于磁记录的方法是将高频偏置信号和记录信号馈送到记录头，通过高频偏置电流形成控制信号，并通过该信号调制高频偏置信号。 此外，形成其频率通过在40-200kHz的频率范围内的所述控制信号而改变的离散值信号。 通过所获得的离散值信号，信号信号的脉冲宽度调制得以实现，所获得的用作高频偏置电流的PWM信号和作为记录信号的低频分量的组合分量和反馈信号是 形成到记录信号的点。 用于磁记录的装置包括连接到记录头（1）的用于接收信息信号的放大电路（2）和用于产生高频偏置信号的单元（8），该单元（8）包括离散值的发生器（9） 连接到脉冲宽度调制器（10）的信号，基于记录信号电流在装置中提供反馈。 本发明可用于控制HF偏置信号的频率并减少控制信号的通过时间。