-
公开(公告)号：US20210201945A1
公开(公告)日：2021-07-01
申请号：US17130857
申请日：2020-12-22
申请人： FUJIFILM Corporation
发明人： Norihito KASADA , Yuto Murata , Yusuke Kaneko
摘要： A magnetic tape in which a minimum value of TDStens among five TDStens measured respectively at a temperature of 16° C. and a relative humidity of 20%, a temperature of 16° C. and a relative humidity of 80%, a temperature of 26° C. and a relative humidity of 80%, a temperature of 32° C. and a relative humidity of 20% and a temperature of 32° C. and a relative humidity of 55% is 1.43 μm/N or more, a ratio of a change of TDStens to a change of a relative humidity obtained from the five TDStens is 0.005 μm/N/% or less, and a ratio of a change of TDStens to a change of a temperature obtained from the five TDStens is 0.020 μm/N/° C. or less.
-
公开(公告)号：US20220277769A1
公开(公告)日：2022-09-01
申请号：US17680866
申请日：2022-02-25
申请人： FUJIFILM Corporation
发明人： Norihito Kasada , Yuto Murata
IPC分类号： G11B5/78
摘要： The magnetic tape includes a non-magnetic support, and a magnetic layer including a ferromagnetic powder. A dimension change amount Δw in a width direction with respect to a tension change in a longitudinal direction is 400 ppm/N to 900 ppm/N, the magnetic layer includes a plurality of servo bands, and a coefficient of variation CV calculated by Equation A: CV=(σG/Δw)×100 is 10% or less. The σG is a standard deviation of servo band intervals measured in a region of the magnetic tape over 100 m in the longitudinal direction with a tension of 0.6 N in the longitudinal direction. A magnetic tape container containing the magnetic tape.
-
3.发明授权公开(公告)号：US11270732B2
公开(公告)日：2022-03-08
申请号：US17161031
申请日：2021-01-28
申请人： FUJIFILM Corporation
发明人： Yuto Murata , Yusuke Kaneko , Norihito Kasada
IPC分类号： G11B5/78 , G11B5/70 , G11B5/73 , G11B5/008 , G11B15/43 , G11B20/12 , G11B5/708 , G11B5/735 , G11B15/32
摘要： In the probability distribution calculated from TDSage, TDSenv, and TC, the magnetic tape has the probability Pfail of equal to or less than 0.2%, in which the absolute value of ΔSB exceeds 0.3 μm. TDSage is a maximum absolute value of a difference between the servo band interval obtained before a predetermined storage and the servo band interval obtained after the storage, TDSenv is a value calculated by multiplying a difference between a maximum value and a minimum value of the servo band interval respectively obtained under five predetermined environments by ½, TC is a value calculated by multiplying TDStens by 0.5 N, and TDStens is a ratio of a change in the servo band interval to a change in tension calculated from the servo band interval respectively obtained under five predetermined environments by applying a plurality of different tensions in the longitudinal direction of the magnetic tape.
-
公开(公告)号：US10902875B2
公开(公告)日：2021-01-26
申请号：US16849154
申请日：2020-04-15
申请人： FUJIFILM Corporation
发明人： Yusuke Kagawa , Norihito Kasada , Yuto Murata
IPC分类号： G11B5/78 , G11B23/107 , G11B5/70 , G11B5/73 , G11B5/735
摘要： 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.
-
公开(公告)号：US11842752B2
公开(公告)日：2023-12-12
申请号：US17680961
申请日：2022-02-25
申请人： FUJIFILM Corporation
发明人： Shota Kamimura , Yuto Murata , Tomohide Ueyama , Norihito Kasada
IPC分类号： G11B23/107 , G11B5/78
CPC分类号： G11B23/107 , G11B5/78
摘要： 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, and the roundness of the trajectory of one rotation drawn by the magnetic tape in a case where the wound magnetic tape is pulled out from the core is 100 μm or less as the arithmetic mean of the measured values at three points in the width direction of the magnetic tape.
-
公开(公告)号：US20230178101A1
公开(公告)日：2023-06-08
申请号：US18161478
申请日：2023-01-30
申请人： FUJIFILM Corporation
发明人： Yuto Murata
CPC分类号： G11B5/17 , G11B15/32 , G11B2220/90
摘要： Provided are a magnetic tape control system that executes pre-rewinding storage of storing a magnetic tape in a state of being wound around a reel, and post-rewinding storage of storing the magnetic tape in a state of being rewound around a reel different from or the same reel as the reel after the pre-rewinding storage such that an end that is a tape outside end during the pre-rewinding storage is turned into a tape inside end and an end that is a tape inside end during the pre-rewinding storage is turned into a tape outside end, and a magnetic tape control device including a rewinding control unit that transmits rewinding execution information, and a drive unit that receives the rewinding execution information and starts running of a magnetic tape stored in a state of being wound around a reel to execute rewinding of the magnetic tape.
-
公开(公告)号：US20200302963A1
公开(公告)日：2020-09-24
申请号：US16825360
申请日：2020-03-20
申请人： FUJIFILM Corporation
发明人： Yuto Murata , Norihito Kasada , Yusuke Kagawa
摘要： 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 containing a ferromagnetic powder, and has a tape thickness of 5.3 μm or less, the magnetic layer includes a plurality of servo bands, and a difference (Ginner−Gouter) between a servo band interval Ginner in a range of 49 m to 51 m from a tape inner end and a servo band interval Gouter in a range of 49 m to 51 m from a tape outer end is −3.9 μm to 1.1 μm as a value measured on 100th day from a date of magnetic tape cartridge manufacture.
-
公开(公告)号：US12106789B2
公开(公告)日：2024-10-01
申请号：US18298084
申请日：2023-04-10
申请人： FUJIFILM Corporation
发明人： Nagisa Yamasaki , Norihito Kasada , Yuto Murata
CPC分类号： G11B5/78 , G11B5/70 , G11B5/5928 , G11B5/84
摘要： The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, and a magnetic tape cartridge and a magnetic tape apparatus include the magnetic tape. The number of recesses existing on a surface of the magnetic layer and having an equivalent circle diameter of 0.15 μm or more and 0.25 μm or less is 100 or more and 2500 or less per an area of 40 μm×40 μm. Standard deviation σ of the number of the recesses in a width direction of the surface of the magnetic layer is 100 or less.
-
公开(公告)号：US11735219B2
公开(公告)日：2023-08-22
申请号：US17680904
申请日：2022-02-25
申请人： FUJIFILM Corporation
发明人： Shota Kamimura , Yuto Murata , Tomohide Ueyama , Norihito Kasada
IPC分类号： G11B5/78 , G11B5/00 , G11B15/093 , G11B15/43
CPC分类号： G11B5/78 , G11B15/43 , B65H2701/378
摘要： 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：US11735218B2
公开(公告)日：2023-08-22
申请号：US17680866
申请日：2022-02-25
申请人： FUJIFILM Corporation
发明人： Norihito Kasada , Yuto Murata
CPC分类号： G11B5/78 , G11B23/042
摘要： The magnetic tape includes a non-magnetic support, and a magnetic layer including a ferromagnetic powder. A dimension change amount Δw in a width direction with respect to a tension change in a longitudinal direction is 400 ppm/N to 900 ppm/N, the magnetic layer includes a plurality of servo bands, and a coefficient of variation CV calculated by Equation A: CV=(σG/Δw)×100 is 10% or less. The σG is a standard deviation of servo band intervals measured in a region of the magnetic tape over 100 m in the longitudinal direction with a tension of 0.6 N in the longitudinal direction. A magnetic tape container containing the magnetic tape.
-
-
-
-
-
-
-
-
-
搜索结果
18 条记录 (耗时 0.022 秒)
