公开(公告)号：EP0196605A3

公开(公告)日：1988-03-30

申请号：EP86104099

申请日：1986-03-25

Applicant: KABUSHIKI KAISHA TOSHIBA ,  Toshiba Computer Engineering Corporation

Inventor： Okamura, Hiroshi c/o Patent Division ,  Kusunoki, Masahiro c/o Patent Division ,  Saito, Toshiya c/o Patent Division ,  Ohashi, Hiroshi c/o Patent Division

IPC: G11B05/127 ,  G11B05/265 ,  G11B05/10 ,  G11B05/48 ,  G11B05/012 ,  G11B05/29

CPC classification number: G11B5/2654 ,  G11B5/012 ,  G11B5/10 ,  G11B5/127 ,  G11B5/4886

Abstract: A magnetic head assembly (32) comprising first and second core assemblies (37, 39) of different types and properties. The first core assembly (37) is of a leading erase type for the perpendicular magnetic recording system, while the second one (39) is of a tunnel erase type for the longitudinal magnetic recording system. These core assemblies (37, 39) are arranged on either side of a slider groove (36). When used with the dopble-sided recording system, they are both located on one side of the alider groove.

Abstract translation: 一种磁头组件（32），包括不同类型和特性的第一和第二芯组件（37,39）。 第一核心组件（37）是用于垂直磁记录系统的主要擦除类型，而第二核心组件（37）是用于纵向磁记录系统的隧道擦除类型。 这些核心组件（37,39）布置在滑块槽（36）的任一侧上。 当与双面记录系统一起使用时，它们都位于锯齿槽的一侧。

公开(公告)号：EP0219222A3

公开(公告)日：1988-03-30

申请号：EP86306978

申请日：1986-09-10

Applicant: VICTOR COMPANY OF JAPAN, LIMITED

Inventor： Niwa, Kazuhiro ,  Kudo, Masahiro ,  Michiwaki, Shigeru Mitsuwasa Kazoku Apaato

IPC: G11B05/53 ,  G11B05/265

CPC classification number: G11B5/2652 ,  G11B5/534

Abstract: An electromagnetic transducer assembly for used in a helical-scan type video tape recorder includes a pair of magnetic heads secured to a nonmagnetic base and successively arranged in spaced relationship with each other in the direction of transport of a magnetic medium, each of the heads comprising a generally U-shaped core having a pair of limb portions and a web portion therebetween, a generally I-shaped core connected to the limb portions to form a closed magnetic circuit having a magnetic gap therein, and a coil wound on the closed magnetic circuit, the I-shaped cores of the heads respectively having confronting edges extending unparallel to the magnetic gaps.

公开(公告)号：EP0149281A3

公开(公告)日：1985-08-14

申请号：EP84201915

申请日：1984-12-19

Applicant: N.V. Philips' Gloeilampenfabrieken

Inventor： Gorter, Frederik Willem ,  Morel, Jean-Paul Germain René ,  Ruigrok, Jacobus Josephus Maria

IPC: G11B05/127 ,  G11B05/23 ,  G11B05/265

CPC classification number: G11B5/2652 ,  G11B5/1875

Abstract: A magnetic head is provided having a core of a soft-magnetic material with a comparatively low saturation magnetization and layers of a soft-magnetic material having a higher saturation magnetization than the material of the core on the gap-bounding faces. In order to avoid the detrimental effects of the non-magnetic transition zones between the material of the core and the layers of soft-magnetic material, which transition zones as it were form subsidiary gaps, the layers of soft-magnetic material on the gap-bounding faces have different thicknesses.

Abstract translation: 提供了一种磁头，其具有饱和磁化强度相对较低的软磁材料的磁芯和饱和磁化强度比间隙界定面上的磁芯材料更高的软磁材料层。 为了避免芯部材料与软磁材料层之间的非磁性过渡区域的不利影响，当它形成辅助间隙时，所述过渡区域在间隙形成层上的软磁材料层， 边界面具有不同的厚度。

公开(公告)号：EP0183412A3

公开(公告)日：1987-09-16

申请号：EP85308122

申请日：1985-11-07

Applicant: Ing. C. Olivetti & C., S.p.A.

Inventor： De Marco, Giuliano ,  Fehl, Alessandro

IPC: G11B05/02 ,  G11B15/12 ,  G11B05/48 ,  G11B05/265 ,  G11B05/012 ,  G11B05/55

CPC classification number: G11B5/012 ,  G11B5/02 ,  G11B5/2655 ,  G11B5/488 ,  G11B5/4886 ,  G11B15/12

Abstract: Apparatus for recording and reproducing data on a magnetic recording medium (27) having a plurality of recording tracks (29) comprises a magnetic head (32) and a mechanism which selectively positions the head (32) with respect to the tracks (29) of the magnetic medium (27). The head has at least two gaps which are of different lengths and which can be selected one at a time for reading and/or recording data on the magnetic recording medium (27). A control circuit controls the positioning mechanism to move the head with respect to the magnetic recording medium by a distance which depends on the gap selected. The packing density of tracks on the recording medium determines which gap is selected for use.

公开(公告)号：EP0152064A3

公开(公告)日：1987-06-03

申请号：EP85101281

申请日：1985-02-07

Applicant: HITACHI, LTD.

Inventor： Abe, Mitsuo ,  Konishi, Katsuo

IPC: G11B05/31 ,  G11B05/23 ,  G11B05/265

CPC classification number: G11B5/3163 ,  G11B5/3106

Abstract: In a thin film magnetic head (10) including a substrate (1) comprising a non-magnetic material, magnetic cores (2, 3) comprising magnetic thin films formed on the substrate so as to form a ring-shaped magnetic circuit, a non-magnetic gap material (5) located at a part of the magnetic cores so as to form a head gap, and windings (7) wound around the magnetic cores so as to have linkage with the magnetic circuit, a non-magnetic pattern material (8) for defining the value of the gap depth (Gd) is provided on at least a gap depth side portion within a region surrounded by the magnetic circuit of the magnetic cores on the substrate.

Abstract translation: 在包括非磁性材料的衬底（1）的薄膜磁头（10）中，包括形成在该衬底上以形成环形磁路的磁性薄膜的磁芯（2,3） 位于磁芯的一部分以形成磁头间隙的磁性间隙材料（5），以及缠绕在磁芯上以与磁路连接的绕组（7），非磁性图案材料 在由衬底上的磁芯的磁路围绕的区域中的至少间隙深度侧部分上设置有用于限定间隙深度（Gd）的值的图8中所示的间隙深度（Gd）。

公开(公告)号：EP0179269A3

公开(公告)日：1988-07-06

申请号：EP85111724

申请日：1985-09-17

Applicant: Hitachi Maxell Ltd. ,  HITACHI, LTD.

Inventor： Inagoya, Osamu ,  Fujiwara, Hideo ,  Tottori, Takeshi ,  Yamano, Minoru ,  Kumasaka, Noriyuki ,  Otomo, Shigekazu ,  Kudo, Mitsuhiro ,  Morikawa, Juiti ,  Ishihara, Kiyoshi ,  Usui, Akira ,  Hayashi, Masashi

IPC: G11B05/127 ,  G11B05/187 ,  G11B05/21 ,  G11B05/265

CPC classification number: G11B5/3103 ,  G11B5/127 ,  G11B5/1878 ,  G11B5/21 ,  G11B5/265

Abstract: In a magnetic head having a pair of core halves each combined through a magnetic gap, each of the core halves comprising a core base having slanted side surfaces on the side opposing to the magnetic gap and a magnetic thin layer formed on the surfaces of the core base on the side opposing to the magnetic gap with magnetic material of high saturation magnetic flux density, the minimum value of sum of products of vertical cross sectional areas of the respective magnetic paths of each of the core halves except for the path of the magnetic gap and the respective saturation magnetic flux densities of the respective parts is greater than the product of the area of the magnetic gap and the saturation magnetic flux density of the magnetic thin layer.

公开(公告)号：EP0131727A3

公开(公告)日：1987-08-26

申请号：EP84106171

申请日：1984-05-30

Applicant: International Business Machines Corporation

Inventor： Fields, Davis Stuart, Jr.

IPC: G11B27/36 ,  G11B15/12 ,  G11B05/008 ,  G11B05/48 ,  G11B05/265 ,  G11B05/39

CPC classification number: G11B5/00817 ,  G11B5/4893 ,  G11B15/12 ,  G11B20/1816 ,  G11B27/36

Abstract: A digital tape drive wherein tape is written, and a read-after-write operation is immediately performed to check the integrity of the write operation, for either direction (11, 12) of tape movement. The tape (10) contains a plurality of parallel data tracks. Two read/write head modules (14, 15) span the entire tape. The read (R) and write (W) gaps of each module are alternately spaced across the width of the tape, such that the write gaps of one module are aligned with the read gaps of the other module. When one module is selected for writing, as a function of the direction of tape movement, the other module is selected to read-after-write check the first module's written data. One module (14) writes odd-track data during one direction (11) of tape movement, and reads even-track data during the opposite direction (12) of tape movement; as the other module (15) writes even-track data during said opposite movement direction (12), and reads odd-track data during said one movement direction (11). Common read and write electronic circuits are switched between the two modules, since each module is using only one of its read and write gap multiples at any given time.

公开(公告)号：WO1998026410A1

公开(公告)日：1998-06-18

申请号：PCT/IB1997001512

申请日：1997-12-04

Applicant: PHILIPS ELECTRONICS N.V. ,  PHILIPS NORDEN AB

Inventor： PHILIPS ELECTRONICS N.V. ,  PHILIPS NORDEN AB ,  KALFS, Johannes, Jozef, Wilhelmus ,  HOOGENDOORN, Abraham

IPC: G11B05/265

CPC classification number: G11B15/087 ,  G11B5/00817 ,  G11B5/4886 ,  G11B5/4893 ,  G11B5/5526 ,  G11B5/5565 ,  G11B5/5582 ,  G11B5/58 ,  G11B5/584 ,  G11B5/59605 ,  G11B5/59627 ,  G11B5/5965 ,  G11B5/59688 ,  G11B5/78 ,  G11B5/82 ,  G11B15/52 ,  G11B25/063 ,  G11B33/14

Abstract: The invention relates to a system comprising a magnetic tape (310) formatted by means of a write head (360), and an apparatus comprising a magnetic head unit (320) which is movable on a transverse direction (y) by means of an actuator. By means of the write head (360) the magnetic tape (310) has been provided with a pattern of servotracks ST101-ST127 which extend in a longitudinal direction (x). The odd-numbered servotracks contain a first servosignal and the even-numbered servotracks contain a second servosignal Sb which is phase opposition to the first servosignal. The servotracks ST103-ST113 and ST116-ST126 have a typical width W1 and form a group of two bands of N1 servotracks which are separated by a band of N2 servotracks ST114, ST115 having a typical width W2. The magnetic tape (310) is adapted to cooperate with an apparatus comprising eight magnetic write heads (H31-H38). The actuator is controlled in response to the servosignals read by the heads. The center-to-center distance (p) between the magnetic write heads (H31-H38) is equal to four times the typical width W1 and, moreover, it holds that: N2 = 2, 4, 6 etc. and W2=(k+1/2)W1 or N2 = 1, 3, 5 etc. and W2=2k.W1, where k = 1, 2 etc.

Abstract translation: 本发明涉及一种包括通过写入头（360）格式化的磁带（310）的系统，以及包括磁头单元（320）的设备，该磁头单元可通过致动器在横向（y）上移动 。 通过写入头（360），磁带（310）已经设置有沿纵向方向（x）延伸的伺服轨迹ST101-ST127的图案。 奇数伺服机构包含第一伺服信号，偶数伺服机构包含与第一伺服信号相反的第二伺服信号Sb。 伺服电机ST103-ST113和ST116-ST126具有典型的宽度W1，并形成由具有典型宽度W2的N2伺服磁带ST114，ST115的频带分离的N1个伺服磁带的一组两个频带。 磁带（310）适于与包括八个磁写头（H31-H38）的装置配合。 响应于头读取的伺服信号来控制致动器。 磁写头（H31-H38）之间的中心到中心距离（p）等于典型宽度W1的四倍，此外，它保持：N2 = 2,4,6等，W2 =（ k + 1/2）W1或N2 = 1,3,5等，W2 = 2k.W1，其中k = 1,2等。

公开(公告)号：WO1989005506A1

公开(公告)日：1989-06-15

申请号：PCT/US1988004301

申请日：1988-12-02

Applicant: FUJITSU AMERICA, INC.

Inventor： FUJITSU AMERICA, INC. ,  NIGAM, Anil

IPC: G11B05/265

CPC classification number: G11B19/00 ,  G11B5/59633

Abstract: A reduced power consumption flopppy disc drive (32) with closed loop servoed high density read/write gaps (66, 86) and low density read/write gaps (64, 84) for updating standard open loop formatted media includes a servo format having timing decode transitions (Ta, Tb, Tc) and alignment transitions (A, B) and a method for field writing the servo format on blank diskettes in a disc drive. The disk drive further allows reduced power consumption by stopping rotation of the disc.

Abstract translation: 具有闭环伺服高密度读/写间隙（66,86）和用于更新标准开环格式化介质的低密度读/写间隙（64,84）的降低功耗的软盘驱动器（32）包括具有定时 解码转换（Ta，Tb，Tc）和对齐转换（A，B）以及用于将伺服格式字段写入磁盘驱动器中的空白软盘上的方法。 磁盘驱动器进一步通过停止盘的旋转来降低功耗。

公开(公告)号：WO1997033274A1

公开(公告)日：1997-09-12

申请号：PCT/IB1997000095

申请日：1997-02-07

Applicant: PHILIPS ELECTRONICS N.V. ,  PHILIPS NORDEN AB

Inventor： PHILIPS ELECTRONICS N.V. ,  PHILIPS NORDEN AB ,  FOLKERTS, Wiepke ,  VAN KESTEREN, Hans, Willem

IPC: G11B05/265

CPC classification number: G11B5/3925 ,  G11B5/00817 ,  G11B5/012 ,  G11B5/31 ,  G11B5/313 ,  G11B5/3903 ,  G11B5/3948 ,  G11B5/3967 ,  G11B5/4886 ,  G11B5/4893 ,  G11B5/584 ,  G11B5/596

Abstract: Magnetic head provided with a head face (21) having a longitudinal direction (L) in which a magnetic recording medium is movable relative to the magnetic head, and a transverse direction (W) oriented transversely to the longitudinal direction. The magnetic head also comprises a structure having integrated, juxtaposed head units (25a; 25b) extending substantially transversely to the longitudinal direction and the transverse direction and each being provided with at least a transducing gap (27a; 27b). To achieve a high channel density, a transducing gap of the one head unit and a transducing gap of the other head unit of every two adjacent head units are present in mutually different planes (P1; P2) oriented substantially to the longitudinal direction.

Abstract translation: 磁头设置有具有纵向方向（L）的头表面（21），磁头记录介质可相对于磁头移动，横向（W）横向于纵向方向。 磁头还包括具有基本上横向于纵向方向和横向方向延伸的并置延伸的头部单元（25a; 25b）的结构，并且每个至少设置有换能间隙（27a; 27b）。 为了实现高通道密度，每个两个相邻头单元的一个头单元和另一个头单元的换能间隙的换能间隙存在于基本上沿纵向方向取向的相互不同的平面（P1; P2）中。