-
公开(公告)号：US20230095712A1
公开(公告)日：2023-03-30
申请号：US17950143
申请日：2022-09-22
Applicant: FUJIFILM CORPORATION
Inventor： Toru NAKAO , Tetsuya KANEKO , Yoichi AKANO
Abstract: A plurality of gap patterns are formed on a front surface of a substrate along a direction corresponding to a width direction of a magnetic tape. The first straight line region has a steeper inclined angle with respect to the first imaginary straight line than the second straight line region. Positions of both ends of the first straight line region and positions of both ends of the second straight line region are aligned in a direction corresponding to a width direction of a magnetic tape. Positions of the plurality of gap patterns are aligned in a longitudinal direction of the magnetic tape. A pulse signal is supplied to each of the plurality of gap patterns with a delay of a predetermined time from one side to the other side in a direction in which the plurality of gap patterns are arranged.
-
12.发明申请公开(公告)号：US20200273489A1
公开(公告)日：2020-08-27
申请号：US16795800
申请日：2020-02-20
Applicant: FUJIFILM Corporation
Inventor： Tetsuya KANEKO , Atsushi MUSHA
Abstract: A magnetic tape reading apparatus comprises an acquisition unit that acquires information on linearity of a servo pattern to be recorded on a servo band of a magnetic tape, a reading element unit in which at least two reading elements each of which reads data from a specific track region included in the magnetic tape are disposed, a servo reading element that reads the servo pattern, a control unit that performs control of positioning the reading element unit, a derivation unit that derives a deviation amount, and an extraction unit that extracts data recorded on the reading target track by performing a waveform equalization process on each reading result for the reading elements in accordance with the deviation amount.
-
公开(公告)号：US20170372744A1
公开(公告)日：2017-12-28
申请号：US15626832
申请日：2017-06-19
Applicant: FUJIFILM Corporation
Inventor： Eiki OZAWA , Tetsuya KANEKO , Norihito KASADA
Abstract: Provided is a magnetic tape in which the total thickness of a non-magnetic layer and a magnetic layer is equal to or smaller than 0.60 μm, the magnetic layer includes a timing-based servo pattern, the magnetic layer includes fatty acid ester, a full width at half maximum of spacing distribution measured by optical interferometry regarding the surface of the magnetic layer before performing vacuum heating with respect to the magnetic tape is greater than 0 nm and equal to or smaller than 7.0 nm, a full width at half maximum of spacing distribution measured after performing the vacuum heating is greater than 0 nm and equal to or smaller than 7.0 nm, and a difference between a spacing measured after performing the vacuum heating and a spacing measured before performing the vacuum heating is greater than 0 nm and equal to or smaller than 8.0 nm.
-
公开(公告)号：US20170372742A1
公开(公告)日：2017-12-28
申请号：US15626355
申请日：2017-06-19
Applicant: FUJIFILM Corporation
Inventor： Tetsuya KANEKO , Norihito KASADA , Eiki OZAWA
CPC classification number: G11B5/78 , G11B5/584 , G11B5/70 , G11B5/7013 , G11B5/70678 , G11B5/708 , G11B5/7085 , G11B5/7305
Abstract: 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, the ferromagnetic powder is ferromagnetic hexagonal ferrite powder, the magnetic layer includes an abrasive, and a tilt cos η of the ferromagnetic hexagonal ferrite powder with respect to a surface of the magnetic layer acquired by cross section observation performed by using a scanning transmission electron microscope is 0.85 to 1.00.
-
公开(公告)号：US20170372727A1
公开(公告)日：2017-12-28
申请号：US15627696
申请日：2017-06-20
Applicant: FUJIFILM Corporation
Inventor： Norihito KASADA , Tetsuya KANEKO , Eiki OZAWA
Abstract: 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.
-
Patent Agency Ranking
公开(公告)号：US20240363143A1
公开(公告)日：2024-10-31
申请号：US18768322
申请日：2024-07-10
Applicant: FUJIFILM Corporation
Inventor： Toru NAKAO , Tetsuya KANEKO , Yoichi AKANO
CPC classification number: G11B5/56 , G11B5/00821
Abstract: A magnetic head includes a pair of servo reading elements corresponding to a pair of servo bands adjacent to each other in a width direction. A processor acquires a first signal based on a first result obtained by reading a servo pattern in a first servo band by a first servo reading element included in a pair of servo reading elements, acquires a second signal based on a second result obtained by reading the servo pattern in a second servo band by a second servo reading element included in the pair of servo reading elements, and outputs a deviation amount signal corresponding to a deviation amount in time between the first signal and the second signal.
-
17.发明公开公开(公告)号：US20240135975A1
公开(公告)日：2024-04-25
申请号：US18405166
申请日：2024-01-05
Applicant: FUJIFILM Corporation
Inventor： Toru NAKAO , Tetsuya KANEKO , Yoichi AKANO
IPC: G11B27/36
CPC classification number: G11B27/36
Abstract: A detection device includes a processing device and a storage medium. An ideal waveform signal indicating an ideal waveform of a servo pattern signal which is a result of reading a servo pattern recorded in a servo band of a magnetic tape by a servo reading element is stored in advance in the storage medium. The processing device acquires a servo band signal which is a result of reading the servo band by the servo reading element, and detects the servo pattern signal by comparing the servo band signal with the ideal waveform signal.
-
18.发明公开公开(公告)号：US20230154494A1
公开(公告)日：2023-05-18
申请号：US18158048
申请日：2023-01-23
Applicant: FUJIFILM Corporation
Inventor： Toru NAKAO , Norihito KASADA , Tetsuya KANEKO , Atsushi MUSHA
IPC: G11B15/43
CPC classification number: G11B15/43
Abstract: Provided is a magnetic tape cartridge including: a case in which a magnetic tape is accommodated; and a storage medium provided in the case, in which the storage medium stores tension allowable range related information regarding an allowable range of tension applied to the magnetic tape.
-
公开(公告)号：US20190130936A1
公开(公告)日：2019-05-02
申请号：US16232165
申请日：2018-12-26
Applicant: FUJIFILM Corporation
Inventor： Tetsuya KANEKO , Norihito KASADA , Eiki OZAWA
CPC classification number: G11B5/3909 , G11B5/00826 , G11B5/5526 , G11B5/584 , G11B5/5926 , G11B5/59633 , G11B5/59688 , G11B5/66 , G11B5/70
Abstract: The magnetic tape device includes: a magnetic tape; and a servo head, in which a magnetic tape transportation speed of the magnetic tape device is equal to or lower than 18 m/sec, the servo head is a magnetic head including a tunnel magnetoresistance effect type element as a servo pattern reading element, the magnetic tape includes a non-magnetic support, and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, the magnetic layer includes a servo pattern, and a coefficient of friction measured regarding a base portion of a surface of the magnetic layer is equal to or smaller than 0.30.
-
公开(公告)号：US20170372740A1
公开(公告)日：2017-12-28
申请号：US15624897
申请日：2017-06-16
Applicant: FUJIFILM Corporation
Inventor： Eiki OZAWA , Tetsuya KANEKO , Norihito KASADA
Abstract: Provided is a magnetic tape in which the total thickness is equal to or smaller than 5.30 μm, the magnetic layer includes a timing-based servo pattern, a magnetic layer surface Ra is equal to or smaller than 1.8 nm, the magnetic layer includes fatty acid ester, a full width at half maximum of spacing distribution measured by optical interferometry regarding the surface of the magnetic layer before performing vacuum heating with respect to the magnetic tape is greater than 0 nm and equal to or smaller than 7.0 nm, a full width at half maximum of spacing distribution measured after performing the vacuum heating is greater than 0 nm and equal to or smaller than 7.0 nm, and a difference between a spacing measured after performing the vacuum heating and a spacing measured before performing the vacuum heating is greater than 0 nm and equal to or smaller than 8.0 nm.
-
-
-
-
-
-
-
-
-
Search Results
46
records
(took 0.021 seconds)
