公开(公告)号：US20230169997A1

公开(公告)日：2023-06-01

申请号：US18160614

申请日：2023-01-27

Applicant: FUJIFILM Corporation

Inventor： Megumi NAKANO ,  Yuto MURATA

IPC: G11B33/14

CPC classification number: G11B33/1453

Abstract: Provided is a magnetic recording and reproducing device including, in a sealed space in the magnetic recording and reproducing device: a magnetic tape; and a magnetic head are provided, in which a relative humidity difference (RHC-RHB) between a relative humidity RHB in the sealed space measured in an environment of a temperature of 21° C. and a relative humidity of 50% and a relative humidity RHC in the sealed space measured in an environment of a temperature of 60° C. and a relative humidity of 5% is within ±10%.

公开(公告)号：US20220277772A1

公开(公告)日：2022-09-01

申请号：US17680904

申请日：2022-02-25

Applicant: FUJIFILM Corporation

Inventor： Shota KAMIMURA ,  Yuto MURATA ,  Tomohide UEYAMA ,  Norihito KASADA

IPC: G11B23/04 ,  G11B23/037 ,  G11B23/107 ,  B65H75/14 ,  G11B5/716

Abstract: The magnetic tape container includes a core around which a magnetic tape is wound. The magnetic tape includes a non-magnetic support, and a magnetic layer including a ferromagnetic powder. A maximum value of a deviation of a center position of an average minimum region reference circle of a trajectory of one rotation drawn by the magnetic tape, in a case where the wound magnetic tape is drawn out from the core core is 100 μm or less for three points of the magnetic tape in a width direction.

公开(公告)号：US20200302964A1

公开(公告)日：2020-09-24

申请号：US16825534

申请日：2020-03-20

Applicant: FUJIFILM Corporation

Inventor： Yuto MURATA ,  Norihito Kasada ,  Yusuke Kagawa

IPC: G11B5/735 ,  G11B5/733

Abstract: In the magnetic tape cartridge, a tape has a tape thickness of 5.3 μm or less, and a difference Winner−Wouter between a tape width Winner at a position of 50 m±1 m from a tape inner end and a tape width Wouter at a position of 50 m±1 m from a tape outer end is 4.1 μm to 19.9 μm as a value measured on 100th day from a date of magnetic tape cartridge manufacture, and a difference Ginner−Gouter between a servo band interval Ginner in a range of 49 m to 51 m from the tape inner end and a servo band interval Gouter in a range of 49 m to 51 m from the tape outer end is −3.9 μm to 0.0 μm as a value measured on 100th day from the date of magnetic tape cartridge manufacture.

公开(公告)号：US20200243111A1

公开(公告)日：2020-07-30

申请号：US16849154

申请日：2020-04-15

Applicant: FUJIFILM Corporation

Inventor： Yusuke KAGAWA ,  Norihito KASADA ,  Yuto MURATA

IPC: G11B5/78 ,  G11B5/73 ,  G11B5/735 ,  G11B5/70 ,  G11B23/107

Abstract: Provided is a magnetic tape cartridge of a single reel type in which a magnetic tape is wound around a reel, in which the magnetic tape includes a non-magnetic support, and a magnetic layer including a ferromagnetic powder and a binding agent on the non-magnetic support, a tape thickness is equal to or smaller than 5.2 μm, a tape width difference (B−A) between a tape width A at a position of 10 m±1 m from a tape outer end and a tape width B at a position of 50 m±1 m from a tape inner end is 2.4 μm to 12.0 μm, and the tape width A and the tape width B are values measured 100 days from the date of magnetic tape cartridge manufacture.