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61. 发明申请

US20170372727A1 MAGNETIC TAPE AND MAGNETIC TAPE DEVICE 审中-公开
公开(公告)号：US20170372727A1
公开(公告)日：2017-12-28
申请号：US15627696
申请日：2017-06-20
申请人： FUJIFILM Corporation
发明人： Norihito KASADA , Tetsuya KANEKO , Eiki OZAWA
IPC分类号： G11B5/008 , G11B5/596 , G11B5/712
摘要： The magnetic tape includes a non-magnetic support; a non-magnetic layer including non-magnetic powder and a binder on the non-magnetic support; and a magnetic layer including ferromagnetic powder and a binder on the non-magnetic layer, in which the total thickness of the non-magnetic layer and the magnetic layer is equal to or smaller than 0.60 μm, the magnetic layer includes a timing-based servo pattern, and logarithmic decrement acquired by a pendulum viscoelasticity test performed regarding the surface of the magnetic layer is equal to or smaller than 0.050.

62. 发明申请

US20170221517A1 MAGNETIC TAPE AND METHOD OF MANUFACTURING THE SAME 审中-公开
公开(公告)号：US20170221517A1
公开(公告)日：2017-08-03
申请号：US15422944
申请日：2017-02-02
申请人： FUJIFILM Corporation
发明人： Eiki OZAWA , Masahito OYANAGI , Norihito KASADA
IPC分类号： G11B5/735 , G11B5/84 , G11B5/733 , G11B5/78 , G11B5/70 , G11B5/73
CPC分类号： G11B5/735 , G11B5/70 , G11B5/7305 , G11B5/733 , G11B5/78 , G11B5/8404 , G11B5/8412
摘要： The magnetic tape has a magnetic layer and a backcoat layer, wherein, each of the magnetic layer and backcoat layer contains a fatty acid ester, the Ra measured on the magnetic layer side surface is less than or equal to 2.8 nm, the difference between the spacing measured by optical interferometry on the magnetic layer side surface after and before vacuum heating is greater than 0 nm but less than or equal to 8.0 nm, the FWHMbefore on the backcoat layer side surface is greater than 0 nm but less than or equal to 10.0 nm, the FWHMafter on the backcoat layer side surface is greater than 0 nm but less than or equal to 10.0 nm; and the difference between the spacing measured on the backcoat layer side surface after and before vacuum heating is greater than 0 nm but less than or equal to 8.0 nm.

63. 发明申请

US20170032812A1 MAGNETIC TAPE AND METHOD OF MANUFACTURING THE SAME 有权
标题翻译：磁带及其制造方法
公开(公告)号：US20170032812A1
公开(公告)日：2017-02-02
申请号：US15218190
申请日：2016-07-25
申请人： FUJIFILM Corporation
发明人： Norihito KASADA
IPC分类号： G11B5/706 , G11B5/84
CPC分类号： G11B5/8404 , G11B5/70 , G11B5/71 , G11B5/735
摘要： The magnetic tape has a magnetic layer containing ferromagnetic powder and binder on one surface of a nonmagnetic support, and has a backcoat layer containing nonmagnetic powder and binder on the other surface thereof, wherein the magnetic layer contains one or more components selected from the group consisting of a fatty acid and a fatty acid amide; the backcoat layer has a thickness of less than or equal to 0.30 μm and contains one or more components selected from the group consisting of a fatty acid and a fatty acid amide; a magnetic layer side C—H derived C concentration is greater than or equal to 45 atom %; and a backcoat layer side C—H derived C concentration is greater than or equal to 35 atom %.
摘要翻译：磁带具有在非磁性载体的一个表面上含有铁磁粉末和粘合剂的磁性层，并且在其另一个表面上具有含有非磁性粉末和粘合剂的背涂层，其中磁性层含有一种或多种选自的脂肪酸和脂肪酸酰胺; 背涂层的厚度为0.30μm以下，含有选自脂肪酸和脂肪酸酰胺的一种以上成分; 磁性层侧C-H衍生C浓度大于或等于45原子％; 并且背涂层侧C-H衍生的C浓度大于或等于35原子％。

64. 发明申请

US20130260179A1 MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME 有权
标题翻译：磁记录介质及其制造方法
公开(公告)号：US20130260179A1
公开(公告)日：2013-10-03
申请号：US13838996
申请日：2013-03-15
申请人： FUJIFILM CORPORATION
发明人： Norihito KASADA , Masahide SATO , Isamu WATANABE
IPC分类号： G11B5/708 , G11B5/842
CPC分类号： G11B5/7085 , G11B5/70 , G11B5/7013 , G11B5/842
摘要： An aspect of the present invention relates to a magnetic recording medium, which comprises a nonmagnetic layer containing a nonmagnetic powder and a binder and a magnetic layer containing a ferromagnetic powder and a binder in this order on a nonmagnetic support, wherein the nonmagnetic layer has a thickness of equal to or less than 300 nm; a composite elastic modulus as measured on a surface of the magnetic layer ranges from 6.0 to 8.0 GPa; the magnetic layer comprises an abrasive with a specific surface area by BET method ranging from 14 m2/g to 40 m2/g; and a surface abrasive occupancy on a surface of the magnetic layer ranges from 0.2% to 2%.
摘要翻译：本发明的一个方面涉及一种磁记录介质，其在非磁性载体上依次包括含有非磁性粉末和粘合剂的非磁性层和含有铁磁粉末和粘合剂的磁性层，其中非磁性层具有等于或小于300nm的厚度; 在磁性层表面测得的复合弹性模量为6.0-8.0GPa; 磁性层包括通过BET法测量的比表面积为14m 2 / g至40m 2 / g的研磨剂; 在磁性层的表面上的表面磨料占有率为0.2％〜2％。

65. 发明申请

US20130084470A1 MAGNETIC RECORDING MEDIUM 审中-公开
标题翻译：磁记录介质
公开(公告)号：US20130084470A1
公开(公告)日：2013-04-04
申请号：US13632627
申请日：2012-10-01
申请人： FUJIFILM CORPORATION
发明人： Yasushi HATTORI , Ryota SUZUKI , Norihito KASADA
IPC分类号： G11B5/706 , G11B5/702
CPC分类号： G11B5/7013 , G11B5/70678 , G11B5/7085
摘要： An aspect of the present invention relates to a magnetic recording medium comprising a magnetic layer containing a ferromagnetic powder and a binder on a nonmagnetic support, wherein the ferromagnetic powder has a hexagonal ferrite structure, the magnetic layer comprises a coefficient of friction-lowering component in the form of nonmagnetic inorganic particles, and a compound in which a substituent selected from the group consisting of a hydroxyl group and a carboxyl group is directly substituted on an aromatic ring.
摘要翻译：本发明的一个方面涉及一种包括在非磁性载体上含有铁磁粉末和粘合剂的磁性层的磁记录介质，其中所述铁磁性粉末具有六边形铁氧体结构，所述磁性层包括摩擦降低成分系数非磁性无机颗粒的形式，其中选自羟基和羧基的取代基在芳环上直接取代的化合物。

66. 发明申请

US20230065359A1 MAGNETIC TAPE CARTRIDGE, INFORMATION ACQUISITION METHOD, AND PROGRAM 有权
公开(公告)号：US20230065359A1
公开(公告)日：2023-03-02
申请号：US17822803
申请日：2022-08-29
申请人： FUJIFILM CORPORATION
发明人： Junichi NAKAMIGAWA , Yasushi KOMORI , Yusuke KANEKO , Tadashi KIRA , Norihito KASADA , Toru NAKAO
IPC分类号： G11B5/584 , G11B5/008
摘要： A magnetic tape cartridge includes a case that accommodates a magnetic tape on which a plurality of servo bands and a plurality of data bands are formed, servo patterns being recorded in the servo bands, and a memory provided in the case. The memory stores servo pattern interval-related information related to a servo pattern interval determined for each of the plurality of data bands included in the magnetic tape. The servo pattern interval is commonly used for a plurality of division areas obtained by dividing the data band in a width direction of the magnetic tape, and is a representative interval between a first servo pattern and a second servo pattern.

67. 发明申请

US20230038397A1 MAGNETIC TAPE DEVICE 有权
公开(公告)号：US20230038397A1
公开(公告)日：2023-02-09
申请号：US17872651
申请日：2022-07-25
申请人： FUJIFILM Corporation
发明人： Norihito KASADA
IPC分类号： G11B5/73 , G11B5/127 , G11B5/78
摘要： A magnetic tape device. The angle θ formed by the axis of the element array of the magnetic head with respect to a width direction of the magnetic tape is changed during running of the magnetic tape in the magnetic tape device. In a case where a maximum value of an absolute value of a difference between a servo band spacing obtained before storage in a predetermined environment and a servo band spacing obtained after storage in the environment for a storage time T is defined as A, and T is set to a plurality of predetermined times, a medium life calculated by a linear function of A and a logarithm loge T of T, that are derived from a value of A and a value of the logarithm loge T of T obtained for each T is 5 years or longer.

68. 发明申请

US20220358958A1 MAGNETIC TAPE CARTRIDGE AND MAGNETIC RECORDING AND REPRODUCING DEVICE 有权
公开(公告)号：US20220358958A1
公开(公告)日：2022-11-10
申请号：US17730311
申请日：2022-04-27
申请人： FUJIFILM Corporation
发明人： Norihito KASADA , Yusuke Kaneko
IPC分类号： G11B5/17 , G11B5/78
摘要： In the magnetic tape, in a case where a maximum value of an absolute value of a difference between a servo band spacing obtained before storage, and a servo band spacing obtained after storage of N cycles, in a case where predetermined storage is set to one cycle, is defined as A, a medium life calculated by a linear function that is derived from the value of A and the value of the logarithm logeT of total storage time T of the storage of N cycles is 3 years or longer. The medium life is T in a case where the A satisfies Equation a: A=1.5−B. The B is calculated by multiplying a difference between a maximum value and a minimum value of the servo band spacings obtained in each of the five environments by ½.

69. 发明申请

US20220254375A1 MAGNETIC TAPE CARTRIDGE, MAGNETIC TAPE DRIVE, MAGNETIC TAPE SYSTEM, AND METHOD OF OPERATING MAGNETIC TAPE DRIVE 有权
公开(公告)号：US20220254375A1
公开(公告)日：2022-08-11
申请号：US17591593
申请日：2022-02-02
申请人： FUJIFILM CORPORATION
发明人： Yusuke KANEKO , Toru NAKAO , Atsushi MUSHA , Norihito KASADA
IPC分类号： G11B5/78
摘要： A magnetic tape cartridge includes a case in which a magnetic tape is housed, and an NVM of a cartridge memory provided in the case. The NVM stores cartridge information including an identification ID regarding an allowable range of temperature/humidity in using the magnetic tape, an upper limit of a preservation period of the magnetic tape, and an upper limit of a use frequency of the magnetic tape.

70. 发明申请

US20220199116A1 MAGNETIC TAPE CARTRIDGE AND MAGNETIC TAPE DEVICE 有权
公开(公告)号：US20220199116A1
公开(公告)日：2022-06-23
申请号：US17645697
申请日：2021-12-22
申请人： FUJIFILM Corporation
发明人： Norihito KASADA
IPC分类号： G11B15/093 , G11B5/008 , G11B5/78
摘要： The magnetic tape cartridge includes a magnetic tape, and a cartridge reel, in which, in the magnetic tape, a minimum winding deviation occurrence load measured after the magnetic tape is rewound around the cartridge reel by applying a tension of 0.30 N in a longitudinal direction of the magnetic tape is 250 N or less.

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