公开(公告)号：JP2002197748A

公开(公告)日：2002-07-12

申请号：JP2000397286

申请日：2000-12-27

Applicant: SONY CORP

Inventor： HAYATA YUTAKA ,  KASUGA KATSUHIRO ,  NAGAI NOBUYUKI

IPC: G11B33/14 ,  G11B5/39 ,  G11B15/00

Abstract: PROBLEM TO BE SOLVED: To suppress static electrification at the time of attaching and operating a magnetic recording medium and the like and to prevent electrostatic destruction of a magneto-resistive head. SOLUTION: Antistatic measures are performed to a press sheet 11 by forming the press sheet 11 using a conductive material, forming an antistatic film on the surface of the press sheet 11 or the like.

公开(公告)号：JP2002197746A

公开(公告)日：2002-07-12

申请号：JP2000394507

申请日：2000-12-26

Applicant: SONY CORP

Inventor： NAGAI NOBUYUKI ,  HAYATA YUTAKA ,  KASUGA KATSUHIRO ,  MEGURO HIROSHI ,  OSUE TADASHI

IPC: G11B33/14 ,  G11B5/39 ,  G11B15/00

Abstract: PROBLEM TO BE SOLVED: To suppress static electrification at the time of attaching and operating a magnetic recording medium and to prevent electrostatic breakdown of a magneto-resistive head. SOLUTION: Antistatic property is imparted to the reel parts 24a, 24b of a magnetic cassette tape 20 and the reel accepting parts 15a, 15b of a magnetic tape drive 10 by adopting a conductive material for the reel parts 24a, 24b and the reel accepting parts 15a, 15b.

公开(公告)号：JP2002183932A

公开(公告)日：2002-06-28

申请号：JP2000376768

申请日：2000-12-12

Applicant: SONY CORP

Inventor： NAGAI NOBUYUKI ,  HAYATA YUTAKA ,  KASUGA KATSUHIRO ,  ONODERA SEIICHI ,  OSUE TADASHI

IPC: G11B5/725 ,  G11B5/64 ,  G11B5/65

Abstract: PROBLEM TO BE SOLVED: To suppress electrostatic charging of a magnetic recording medium during mounting or operating and to prevent electrostatic breakdown of a magnetoresistance effect head. SOLUTION: The thickness of the magnetic layer 13 of a magnetic tape is specified to >=10 nm and =20 atomic % and =103Ω/inch2 and

公开(公告)号：JP2002197828A

公开(公告)日：2002-07-12

申请号：JP2000397287

申请日：2000-12-27

Applicant: SONY CORP

Inventor： HAYATA YUTAKA ,  NAGAI NOBUYUKI ,  KASUGA KATSUHIRO ,  OTA TAKASHI ,  MEGURO HIROSHI ,  OSUE TADASHI

IPC: G11B23/087 ,  G11B5/39 ,  G11B15/00 ,  G11B15/08

Abstract: PROBLEM TO BE SOLVED: To prevent the electrostatic discharge damage of a magneto-resistive head by suppressing the electrification of static electricity in loading, operating, etc., of a magnetic recording medium. SOLUTION: Antistatic films are formed on a lid 2, an upper shell 3, a transparent window 4 and at least either the inner side or the outer side of a lower shell 7 as the antistatic countermeasure for the lid 2, the upper shell 3, the transparent window 4 and the lower shell 7.

公开(公告)号：JP2002197744A

公开(公告)日：2002-07-12

申请号：JP2000399951

申请日：2000-12-28

Applicant: SONY CORP

Inventor： HAYATA YUTAKA ,  KASUGA KATSUHIRO ,  NAGAI NOBUYUKI

IPC: G11B5/39 ,  G11B15/00 ,  G11B15/675

Abstract: PROBLEM TO BE SOLVED: To prevent an MR head from electrostatically being destroyed in a magnetic recording and reproducing device equipped with the MR head. SOLUTION: A mechanism chassis 1a held at a ground potential and a conductive cassette mechanism 8 which carries a cassette case into the magnetic recording and reproducing device 1 are electrically connected together by resistances 10a and 10b. Consequently, when the cassette case having been charged with static electricity is inserted or if static electricity is generated by loading and unloading a magnetic tape in and from a drum device 3, the static electricity is discharged to the mechanism chassis 1a through the cassette mechanism 8 and resistances 10a and 10b.

公开(公告)号：JP2002197757A

公开(公告)日：2002-07-12

申请号：JP2000401102

申请日：2000-12-28

Applicant: SONY CORP

Inventor： HAYATA YUTAKA ,  NAGAI NOBUYUKI ,  KASUGA KATSUHIRO ,  FUKUDA SHINICHI

IPC: G11B5/40 ,  G11B15/665

Abstract: PROBLEM TO BE SOLVED: To prevent the generation of electrostatic destruction of an MR head, in a magnetic recording and reproducing device provided with the MR head. SOLUTION: When a system controller 11 detects the time when a cassette case is inserted by the detection signal from a cassette sensor 15, the system controller 11 rotates a drum motor 33 via a motor driver 14 and detects the position of a reproducing magnetic head by the detection signal from an FG 31 and a PG 32 to control the drum motor 33 so that the reproducing magnetic head is stopped in the position that does not face toward the direction of the insertion port of the cassette case. When the system controller 11 detects the time when the cassette case is ejected by the cassette sensor 15, the system controller 11 also controls the rotary drive of the drum motor 33.

公开(公告)号：JP2002197749A

公开(公告)日：2002-07-12

申请号：JP2000397285

申请日：2000-12-27

Applicant: SONY CORP

Inventor： NAGAI NOBUYUKI ,  HAYATA YUTAKA ,  KASUGA KATSUHIRO

IPC: G11B5/39 ,  G11B15/00 ,  G11B15/18

Abstract: PROBLEM TO BE SOLVED: To prevent an MR head from electrostatically being destroyed in a magnetic recording and reproducing device equipped with the MR head. SOLUTION: When a user performs inputs for fast-forwarding or rewinding operation on a computer device 20, a system controller 13 receives a control signal corresponding to the operation input. The system controller 13 sends a control signal instructing a motor driver 15 to starts driving a thread motor 12 to rotate and then the thread motor 12 is driven to rotate, so that a magnetic tape is separted from a drum device equipped with the MR head and stopped. Then a capstan motor 11 is rotated fast in a specific direction under the control of the system controller 13 and a motor driver 14 to forward fast or rewind the magnetic tape.

公开(公告)号：JP2002197747A

公开(公告)日：2002-07-12

申请号：JP2000401103

申请日：2000-12-28

Applicant: SONY CORP

Inventor： HAYATA YUTAKA ,  KASUGA KATSUHIRO ,  NAGAI NOBUYUKI ,  OSUE TADASHI

IPC: G11B5/40 ,  G11B15/00 ,  G11B15/665

Abstract: PROBLEM TO BE SOLVED: To suppress static electrification at the time of attaching and operating a magnetic recording medium and the like and to prevent electrostatic destruction of a magneto-resistive head. SOLUTION: Antistatic countermeasure is performed to a thread guide 13 guiding the movement of tape guide rollers 12a, 12b, 12e and 12f winding a magnetic tape 21 on a rotary drum 11 having a magneto-resistive head 11a mounted thereon and gears 14a-14g driving a thread mechanism winding the magnetic tape 21 on the rotary drum 11.

公开(公告)号：JP2002203387A

公开(公告)日：2002-07-19

申请号：JP2000401892

申请日：2000-12-28

Applicant: SONY CORP

Inventor： HAYATA YUTAKA ,  KASUGA KATSUHIRO ,  NAGAI NOBUYUKI

IPC: G11B33/14 ,  G11B5/40 ,  G11B15/00 ,  G11B33/02

Abstract: PROBLEM TO BE SOLVED: To prevent occurrence of dielectric breakdown of a MR head in a magnetic recording and reproducing device provided with the MR head. SOLUTION: A panel main body 9a and an opening and closing cover 9e constituting a front panel 9 is made conductive so that electric resistance values are 0 to 1×1012 Ω, and they are connected electrically to a mechanical chassis. The mechanical chassis is made to have a ground potential, therefore, when a cassette case charged with static electricity is inserted from an opening part 9d, the cassette case is brought into contact with the panel main part 9a and the opening and closing cover 9e in the opening part 9d, thereby, static electricity is discharged to ground through the front panel 9, after that, when a magnetic tape is loaded and comes in contact with a magnetic head for reproduction, occurrence of dielectric breakdown of a MR element is prevented.

公开(公告)号：JP2002197830A

公开(公告)日：2002-07-12

申请号：JP2000399950

申请日：2000-12-28

Applicant: SONY CORP

Inventor： HAYATA YUTAKA ,  KASUGA KATSUHIRO ,  NAGAI NOBUYUKI ,  OTA TAKASHI ,  OSUE TADASHI

IPC: G11B23/087 ,  G11B5/39

Abstract: PROBLEM TO BE SOLVED: To prevent the electrostatic discharge damage of a magneto-resistive head by suppressing the electrification of static electricity in loading, operating, etc., of a magnetic recording medium. SOLUTION: Tape guide portions 2a and 2b of a magnetic cassette tape 1 are composed of conductive materials, by which the tape guide portions 2a and 2b are subjected to an antistatic countermeasure.