公开(公告)号：EP0097975A3

公开(公告)日：1984-03-28

申请号：EP83106393

申请日：1983-06-30

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Yamamori,Kazuyoshi

IPC: G11B05/12 ,  G11B05/22 ,  G11B05/27

CPC classification number: G11B5/2651 ,  G11B5/1278 ,  G11B5/1871

Abstract: A magnetic head including a head chip (22) and head holders (24,26) for holding the head chip therebetween. The head chip includes a core (28, 30) of magentically permeable material which is closed except for a transducing gap (32, 34, 35) provided in the core and is wound by a coil (42, 44). The head holders (24,26) are made of non-magnetic material and has a guide surface which is brought into slidable contact with a magnetic recording medium. On the guide surface, grooves (50, 52) are formed along the direction of the relative movement of the magnetic recording medium with respect to the head.

公开(公告)号：WO1984003984A1

公开(公告)日：1984-10-11

申请号：PCT/JP1984000159

申请日：1984-04-02

Applicant: HITACHI, LTD. ,  KUMASAKA, Noriyuki ,  FUJIWARA, Hideo ,  OHTOMO, Shigekazu ,  YAMASHITA, Takeo ,  SAITO, Noritoshi ,  KUDO, Mitsuhiro

Inventor： HITACHI, LTD.

IPC: G11B05/27

CPC classification number: G11B5/2651 ,  G11B5/2655

Abstract: A magnetic head which enables the formation of a guard band on a magnetic recording medium, and which is particularly suitable for a magnetic disk, is disclosed together with a method of manufacturing thereof. The magnetic head is provided with a recording/reproducing head core (31) and an erasure head core (32) which is also used for forming a guard band, and which is integrally bonded in series to the head core (31). A magnetic circuit is constituted by magnetic metal members (34), (34'), (35), (35') formed on non-magnetic members (33), (33'). It is possible to record on a recording medium with a high coercive force and reduce the track width, and this magnetic head is highly accurate and easy to manufacture.

公开(公告)号：EP0106533A3

公开(公告)日：1984-08-08

申请号：EP83305349

申请日：1983-09-13

Applicant: APPLIED MAGNETICS MAGNETIC HEAD DIVISION CORPORATION

Inventor： Schuler, Heinz

IPC: G11B05/27 ,  G11B05/58 ,  G11B05/105

CPC classification number: G11B5/58 ,  G11B5/2655

Abstract: A magnetic head assembly having a read and write magnetic transducing assembly (390) with a gap (406) for recording a track of data having a first width on a moving magnetic media (160) and an erase magnetic transducing assembly (392) located adjacent said read and write magnetic transducing assembly (390). The erase magnetic transducing assembly includes a pair of erase cores (394, 396) each having two core portions (412, 414) which each terminate in end sections positioned with one end section of each core portion adjacent each other to define an erase gap (426) and with the other end sections of each core portion terminating in end edges which are spaced from each other to define an opening therebetween. The pair of erase cores (394, 396) are positioned in spaced, substantially parallel relationship to each other with a predetermined distance therebetween which is less than said first width. The erase gaps (426) are located on each side of the recording gap to erase a portion of the edge of each recorded track of data having a first width to produce a recorded track of data on a said magnetic media having a track width substantially equal to said predetermined distance. An erase coil (424) encloses two spaced parallel aligned other end sections of one core portions (414,416) of each erase core (394, 396) with the end edges thereof extending slightly beyond the erase coil (424). A back bar (420) having a first end (430) and a second end (432 is positioned across the opening with said first end (430) contiguous each of said end edges of the two spaced parallel aligned other end sections (414, 416). The second end (432) is contiguous the other two spaced parallel aligned other end sections of the other core portion of each erase core to form a closed low reluctance path.

Abstract translation: 一种具有读写磁转换组件（390）的磁头组件，具有用于在移动磁介质（160）上记录具有第一宽度的数据轨迹的间隙（406）和位于邻近位置的擦除磁转换组件（392） 所述读写磁传感组件（390）。 擦除磁转换组件包括一对擦除芯（394,396），每一个具有两个芯部分（412,414），每个芯部分终止于端部，每个芯部分的一个端部分彼此相邻，以限定擦除间隙 并且每个芯部分的另一端部终止于彼此间隔开的端边缘，以在它们之间形成开口。 一对擦除芯（394,396）以彼此间隔开的大致平行的关系定位，其间的预定距离小于所述第一宽度。 擦除间隙（426）位于记录间隙的每一侧，以擦除具有第一宽度的每个记录的轨道的边缘的一部分，以在所述磁性介质上产生具有轨道宽度基本相等的数据记录轨迹 到所述预定距离。 擦除线圈（424）包围每个擦除芯（394,396）的一个芯部（414,416）的两个间隔开的平行排列的另一端部，其端边缘稍微延伸超过擦除线圈（424）。 具有第一端（430）和第二端（432）的后杆（420）跨越所述开口定位，所述第一端（430）邻接所述两个间隔开的平行对齐的另一端部（414）的每个所述端边缘 ，416）。 第二端（432）与每个擦除芯的另一个芯部分的另外两个间隔开的平行排列的另外的端部相邻，以形成闭合的低磁阻路径。

公开(公告)号：EP0039090A3

公开(公告)日：1981-12-09

申请号：EP81103292

申请日：1981-04-30

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Fujioka, Yoshiharu ,  Takei, Shushi

IPC: G11B05/27 ,  G11B05/42

CPC classification number: G11B5/1871 ,  G11B5/265 ,  Y10T29/49048 ,  Y10T29/49057

Abstract: A composite magnetic head structure of the following construction is disclosed. A composite magnetic head structure comprising: a front core (16) consisting of a non-magnetic spacing means (10) for separating a read/write magnetic flux path from an erase magnetic flux path and first and second core chips (12,14) adhered together with the spacing means (10) interposed therebetween, at the central portion of said first core chip (12) being formed a read/write gap (28) which is parallel to the longitudinal direction of said spacing means (10) and whose width is defined by first and second notches (30,32) extending from respective side edges of said first core chip (12), and erase gaps (34,36) being formed in said second core chip (14) which extend between the side edges of said second core chip (14) parallel to the longitudinal direction of said spacing means and whose widths are defined by a third notch (38) formed at a positon substantially corresponding to said read/write gap (28) as viewed along the direction of arrangement of said first and second core chips (12,14); a back core (18) adhered to said front core (16) forming said read/write magnetic flux path and said erase magnetic flux path, said back core (18) having a read/write magnetic leg (20) forming said read/write magnetic flux path, an erase leg (22) forming said erase magneticflux path, and a common leg (56) forming both said magnetic flux paths and having a fourth notch (58) for separating said magnetic flux paths formed at a position corresponding to said spacing means;

公开(公告)号：EP0096418A3

公开(公告)日：1984-11-14

申请号：EP83105628

申请日：1983-06-08

Applicant: HITACHI, LTD.

Inventor： Higuchi, Shigemitsu ,  Konno, Kazutoshi ,  Sampei, Tohru

IPC: G11B05/27 ,  G11B05/012 ,  G11B05/48

CPC classification number: G11B5/2655 ,  G11B5/4886

Abstract: A magnetic head (5) suitable for use in a magnetic disk. In a magnetic head in accordance with the present invention, a read/write head (20) and an erase head (10) are placed side by side in the rotation direction of the magnetic disk. A gap (30) in the read/write head is placed at a distance of from a pair of gaps (40a, 40b) in the erase head. In addition, the read/write gap in the read/write head is deviated by a distance L in the external circumference direction with respect to a pair of erase gaps in the erase head.

公开(公告)号：EP0012842A3

公开(公告)日：1980-09-03

申请号：EP79104588

申请日：1979-11-19

Applicant: International Business Machines Corporation

Inventor： King, Francis Kong ,  Maurine, Ronald John ,  Wanek, Donald John

IPC: G11B05/27 ,  G11B05/20

CPC classification number: G11B5/6005 ,  G11B5/1871 ,  G11B5/58

Abstract: The specification describes an assembly of a pair of magnetic transducers (400) held substantially in contact with opposite sides of a flexible magnetic disk wherein each transducer has a pair of disk contacting lands (404,406) each broadening from the leading edge (404b) to the trailing edge (404c), with the leading edge (404b) and side edge (404d) of each land being gradually blended into the surrounding active surface of the transducer and with the trailing edge (404c) of the land being sharp. A first one (404) of the lands of each transducer has a read/write magnetic gap (28U) in it, and in use (this land is located opposite the second land (not having the read/write gap in it) of the other transducer, the second land being wider than the first land in each case. The centres of the opposing lands are in alignment, the centres being located on a plane passing through the read/write gaps of the transducers.

Abstract translation: 本说明书描述了一对基本上与柔性磁盘的相对侧保持接触的磁性换能器（400）的组件，其中每个换能器具有一对从前缘（404b）到 后缘（404c），其中每个脊的前缘（404b）和侧边缘（404d）逐渐地混合到换能器的周围的有效表面中，并且脊部的后缘（404c）是锋利的。 每个换能器的焊盘的第一个（404）在其中具有读/写磁隙（28U），并且在使用中（该焊盘与第二焊盘（其中没有读/写间隙）位于相对的位置 在另一个换能器中，在每种情况下，第二平台比第一平台宽，相对的平台的中心对准，中心位于穿过换能器的读/写间隙的平面上，

公开(公告)号：EP0105720A3

公开(公告)日：1985-11-27

申请号：EP83305851

申请日：1983-09-28

Applicant: AMPEX CORPORATION

Inventor： Latimer, Stanley M. ,  Orton, Gregory A.

IPC: G11B05/12 ,  G11B05/16 ,  G11B05/28 ,  G11B05/27 ,  G11B05/42

CPC classification number: G11B5/232 ,  G11B5/105 ,  G11B5/1272 ,  G11B5/1475 ,  G11B5/2651 ,  G11B5/295 ,  Y10T29/49055

Abstract: A magnetic transducer assembly having separate core portions (12, 13) with keyways (17,18) provided therein. The core portions are assembled to form a substantially closed magnetic circuit defining a transducing gap (35). The keyways form recesses which are contiguous with a transducer inner space provided by the assembled cores. The inner space and recesses are filled with a nonmagnetic bonding material. The resulting bond improves the mechanical coupling between the core portions.

公开(公告)号：EP0110513A3

公开(公告)日：1985-09-18

申请号：EP83305792

申请日：1983-09-26

Applicant: GARLIC TECHNOLOGY, INC.

Inventor： Moore, Peter Cecil

IPC: G11B05/27 ,  G11B05/42

CPC classification number: G11B5/2655 ,  G11B5/2657

Abstract: A magnetic multi-gap transducer having a single integrated core structure with a central common I-bar (22) and a pair of flanking pole pieces (21, 23). A first relatively low reluctance magnetic path is formed by the I-bar and a first one (21) of the flanking pole pieces to provide a recording gap (26) having a read function capability. A second relatively high reluctance magnetic path is formed by the central I-bar (22) and the other flanking pole piece (23) so as to define a second recording gap (27), the low reluctance for the second path being provided by a relatively large non-magnetic air gap between the I-bar and the second pole piece. The integrated core structure is embedded in a non-magnetic slider (10), and each flanking pole piece (21, 23) has an electromagnetic coil (31, 33) received thereon.

公开(公告)号：EP0115052A3

公开(公告)日：1985-09-04

申请号：EP83113001

申请日：1983-12-22

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Fujioka, Masahiko

IPC: G11B05/27

CPC classification number: G11B5/2655

Abstract: A magnetic head device has a read/write head (12) and an erasing head (14). The read/write head has first and second recording/reproducing cores (16, 20). A read/write gap (22) is defined between gap defining end portions (19, 21) of the first and second recording/reproducing cores. The erasing head has first and second erasing cores (24, 28). Two erasing gaps (32) are defined between gap defining end portions (25, 29) of the first and second erasing cores. The gap defining end portions (19, 25) of the first recording/ reproducing core and the first erasing core are tapered.