公开(公告)号：EP0455438B1

公开(公告)日：1996-07-03

申请号：EP91303831.1

申请日：1991-04-26

申请人： International Business Machines Corporation

发明人： Klaassen, Klaas Berend ,  Van Peppen, Jacobus Cornelis Leonardus

IPC分类号： G11B19/04 ,  G11B5/465 ,  G11B5/03

CPC分类号： G11B5/022 ,  G11B5/09 ,  G11B5/465 ,  G11B5/5534 ,  G11B19/04

公开(公告)号：EP0455438A2

公开(公告)日：1991-11-06

申请号：EP91303831.1

申请日：1991-04-26

申请人： International Business Machines Corporation

发明人： Klaassen, Klaas Berend ,  Van Peppen, Jacobus Cornelis Leonardus

IPC分类号： G11B19/04 ,  G11B5/465 ,  G11B5/03

CPC分类号： G11B5/022 ,  G11B5/09 ,  G11B5/465 ,  G11B5/5534 ,  G11B19/04

摘要： The system includes a current- tapering circuit (100,105,112) which gradually reduces the WRITE (IW) current in a magnetic recording head (140) to zero over a time interval on the same order of magnitude as the characteristic relaxation time of the domain patterns in the magnetic recording head, rather than abruptly. Specific embodiments of the current-tapering circuit create a down-sloping ramp, a decaying exponential curve, and a high-frequency burst. The resultant magnetic recording system has reduced Barkhausen noise and reproducible READ performance as well as improved READ sensitivity following a WRITE operation.

摘要翻译： 该系统包括电流收缩电路（100,105,112），其使磁记录头（140）中的写入（IW）电流逐渐减小到在时间间隔上零，其量值与磁畴图案的特征弛豫时间相同 磁记录头，而不是突然。 电流收缩电路的具体实施例产生下斜坡，衰减指数曲线和高频突发。 由此产生的磁记录系统减少了巴克豪森噪声和可重复的READ性能，并改善了WRITE操作后的读取灵敏度。

公开(公告)号：EP0327381A2

公开(公告)日：1989-08-09

申请号：EP89301061.1

申请日：1989-02-03

申请人： Recoton Corporation

发明人： Andreas, Sam

IPC分类号： G11B5/465

CPC分类号： G11B5/465

摘要： A simple and inexpensive demagnetizer for the magnetic heads (20) of a tape cassette recording and/or reproducing device includes an intermediate gear (36) which is rotated by either one or two hub gears (32, 34) engaging respective drive spindles of the recording and/or reproducing device. A push-pull rod (46) has one end pivotally connected to an outer radial position of the intermediate gear (36) and another end pivotally connected to a source (44) of alternating magnetic field of constant intensity. Rotation of the inter­mediate gear (36) causes the magnetic field generator to be cyclically and linearly reciprocated with respect to the head (20) so as to produce a decreasing magnetic field at the head.

摘要翻译： 用于磁带盒记录和/或再现装置的磁头（20）的简单且便宜的去磁器包括中间齿轮（36），该中间齿轮通过一个或两个轮毂齿轮（32,34）旋转，该齿轮啮合相应的驱动轴 记录和/或再现设备。 推拉杆（46）的一端枢转地连接到中间齿轮（36）的外径向位置，另一端枢转地连接到具有恒定强度的交变磁场的源（44）。 中间齿轮（36）的旋转使得磁场发生器相对于头部（20）循环且线性地往复运动，以便在头部产生减小的磁场。

公开(公告)号：EP1971921A4

公开(公告)日：2009-07-15

申请号：EP06846754

申请日：2006-12-21

申请人： TEXAS INSTRUMENTS INC

发明人： HASHIZUME MOTOMU ,  HIROSAWA TAKASHI

IPC分类号： G06F12/00 ,  G11B5/465

CPC分类号： G11B5/465 ,  G11B2005/0018

摘要： A write head degaussing circuit (40) and methodology configured to end the degaussing signal (66) a selectable percentage short of the tapered degaussing waveform, starting the degaussing of the write head current Iw at a percentage less than Iw, removing any overshoot of the degaussing signal, and any combination of the above.

摘要翻译： 一种写头消磁电路和方法，其配置为使消磁信号结束可选择百分比的渐缩消磁波形，开始以小于Iw的百分比消除写入头电流Iw，消除消磁信号的任何过冲，以及任何组合 的上述。

公开(公告)号：EP0645760A3

公开(公告)日：1996-07-24

申请号：EP94480077.0

申请日：1994-09-06

申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION

发明人： Abboud, Samir Elias ,  Brown, Jeffrey Bernard ,  Apuzzo, Nickolas Christopher ,  Cunningham, Earl Albert ,  Hannon, David Malcolm ,  Tyler, Paul Sheldon ,  Mallette, Raymond Patrick ,  Voss, Steven Harry ,  Wallash, Albert John

IPC分类号： G11B5/39 ,  G11B5/465 ,  G11B5/48

CPC分类号： G11B5/3903 ,  G11B5/465 ,  G11B5/4886 ,  G11B2005/0008 ,  Y10T29/49034

摘要： The magnetic states of MR reproducing heads (24) are reinitialized during media drive manufacturing by applying initializing magnetic fields to the transducers after they have been manufactured and incorporated into media drive assemblies (HSA).

公开(公告)号：EP0357889A3

公开(公告)日：1992-03-18

申请号：EP89110672.6

申请日：1989-06-13

申请人： Hewlett-Packard Company

发明人： Gailbreath, Samuel H. ,  Simmons, Ralph F.

IPC分类号： G11B5/465 ,  G11B19/04

CPC分类号： G11B19/04 ,  G11B5/465 ,  G11B15/125

摘要： Noise in the readback signal of a magnetic recording device resulting from spurious pulses in the readback signal produced by transitions of the magnetic remanent state of the yoke in the read/write transducer is eliminated by controlling the occurrence of the spurious pulses. Immediately following the completion of the write process, a decreasing amplitude alternating current (58) is applied to the read/write coil (49) of the transducer to drive the yoke remanent state to a stable or zero remanent state prior to the commencement of the read process.

摘要翻译： 通过控制寄生脉冲的发生来消除由读/写换能器中磁轭的磁残余状态的转变产生的回读信号中由寄生脉冲引起的磁记录装置的回读信号中的噪声。 紧接着写入处理结束之后，向换能器的读/写线圈（49）施加减小的振幅交流电流（58），以便在开始之前将轭保持状态驱动到稳定或零剩余状态 阅读过程。

公开(公告)号：EP3069373B1

公开(公告)日：2024-03-13

申请号：EP14799849.6

申请日：2014-11-11

发明人： HOYES, John Brian ,  PRINGLE, Steven Derek ,  SALARZAEI, Farnoush ,  WILDGOOSE, Jason Lee

IPC分类号： G11B5/465 ,  H01J49/00 ,  G01N27/623

公开(公告)号：EP0891596B1

公开(公告)日：2008-05-14

申请号：EP97908906.7

申请日：1997-03-07

申请人： Card Technology Corporation

发明人： LaMANNA, Richard, J. ,  ASHLEY, Keith, R. ,  PANKIW, Igor ,  ROTH, Philip, M. ,  HAGUE, Edward, W.

IPC分类号： G06K5/00 ,  G06K13/00 ,  G06K13/04 ,  G06K13/06 ,  G06K7/00 ,  G06K19/00 ,  G06K19/06 ,  G06K13/08 ,  G06K13/07 ,  G06K17/00 ,  G11B5/465 ,  G06K7/08

CPC分类号： G06K13/077 ,  B41J3/385 ,  G06K13/07 ,  G06K17/00 ,  G06K2017/0041

摘要： A transport mechanism for transporting cards (114) along a transport path (108) and method of operation thereof. A card transport mechanism (180) includes a pair of spaced apart channels (186, 188), each channel engaging a different one of a pair of opposed edges of the cards; a carriage (196) for holding the cards at a fixed position relative to the carriage during motion along the transport path, the carriage having first (198) and second (120) card contacting elements spaced apart at different positions along the transport path and projecting into the transport path for contacting and holding a card in the fixed position during motion along the transport.

公开(公告)号：EP1619667A3

公开(公告)日：2007-05-02

申请号：EP05016028.2

申请日：2005-07-22

申请人： Data Security, Inc.

发明人： Schultz, Robert A.

IPC分类号： G11B5/465 ,  G11B5/024

CPC分类号： G11B5/0245 ,  H01F13/006

摘要： One or more pairs of magnet assemblages (14 and 16) are provided with magnetized segments (21-30) arranged in a Halbach-like array. The magnet assemblages (14 and 16) define a gap (18) through which magnetic data storage media (12) pass in a direction (20) across the segments (21-30). The magnetized sides (36) of the magnet assemblages (14 and 16) face each other thereby creating strong magnetic fields which degauss the magnetic data storage media (12) passing through the gap (18).

摘要翻译： 一对或多对磁体组件（14和16）设置有以哈尔巴赫（Halbach）状阵列布置的磁化段（21-30）。 磁体组件（14和16）限定磁性数据存储介质（12）穿过片段（21-30）的方向（20）穿过的间隙（18）。 磁体组件（14和16）的磁化侧（36）彼此面对，由此产生强磁场，其对穿过间隙（18）的磁数据存储介质（12）消磁。

公开(公告)号：EP0327381A3

公开(公告)日：1992-01-15

申请号：EP89301061.1

申请日：1989-02-03

申请人： Recoton Corporation

发明人： Andreas, Sam

IPC分类号： G11B5/465

CPC分类号： G11B5/465

摘要： A simple and inexpensive demagnetizer for the magnetic heads (20) of a tape cassette recording and/or reproducing device includes an intermediate gear (36) which is rotated by either one or two hub gears (32, 34) engaging respective drive spindles of the recording and/or reproducing device. A push-pull rod (46) has one end pivotally connected to an outer radial position of the intermediate gear (36) and another end pivotally connected to a source (44) of alternating magnetic field of constant intensity. Rotation of the inter­mediate gear (36) causes the magnetic field generator to be cyclically and linearly reciprocated with respect to the head (20) so as to produce a decreasing magnetic field at the head.