公开(公告)号：EP0196605A3

公开(公告)日：1988-03-30

申请号：EP86104099

申请日：1986-03-25

申请人： KABUSHIKI KAISHA TOSHIBA ,  Toshiba Computer Engineering Corporation

发明人： 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分类号： G11B05/127 ,  G11B05/265 ,  G11B05/10 ,  G11B05/48 ,  G11B05/012 ,  G11B05/29

CPC分类号： G11B5/2654 ,  G11B5/012 ,  G11B5/10 ,  G11B5/127 ,  G11B5/4886

摘要： 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.

摘要翻译： 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

申请人： VICTOR COMPANY OF JAPAN, LIMITED

发明人： Niwa, Kazuhiro ,  Kudo, Masahiro ,  Michiwaki, Shigeru Mitsuwasa Kazoku Apaato

IPC分类号： G11B05/53 ,  G11B05/265

CPC分类号： G11B5/2652 ,  G11B5/534

摘要： 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

申请人： N.V. Philips' Gloeilampenfabrieken

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

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

CPC分类号： G11B5/2652 ,  G11B5/1875

摘要： 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.

摘要翻译： 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

申请人： Ing. C. Olivetti & C., S.p.A.

发明人： De Marco, Giuliano ,  Fehl, Alessandro

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

CPC分类号： G11B5/012 ,  G11B5/02 ,  G11B5/2655 ,  G11B5/488 ,  G11B5/4886 ,  G11B15/12

摘要： 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

申请人： HITACHI, LTD.

发明人： Abe, Mitsuo ,  Konishi, Katsuo

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

CPC分类号： G11B5/3163 ,  G11B5/3106

摘要： 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.

摘要翻译： 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

申请人： Hitachi Maxell Ltd. ,  HITACHI, LTD.

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

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

CPC分类号： G11B5/3103 ,  G11B5/127 ,  G11B5/1878 ,  G11B5/21 ,  G11B5/265

摘要： 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

申请人： International Business Machines Corporation

发明人： Fields, Davis Stuart, Jr.

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

CPC分类号： G11B5/00817 ,  G11B5/4893 ,  G11B15/12 ,  G11B20/1816 ,  G11B27/36

摘要： 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.