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公开(公告)号：US20240212708A1
公开(公告)日：2024-06-27
申请号：US18599062
申请日：2024-03-07
Applicant: FUJIFILM CORPORATION
Inventor： Toru NAKAO , Tetsuya KANEKO , Yoichi AKANO
CPC classification number: G11B5/5928 , G11B5/78 , G11B5/84 , G11B15/43 , G11B15/602
Abstract: A plurality of servo patterns are recorded in a magnetic tape along a longitudinal direction. The servo pattern is at least one linear magnetization region pair. The linear magnetization region pair includes a first linear magnetization region, which is linearly magnetized, and a second linear magnetization region, which is linearly magnetized. The first linear magnetization region and the second linear magnetization region are inclined in opposite directions with respect to a first imaginary straight line along a width direction of the magnetic tape. The first linear magnetization region has a steeper inclined angle with respect to the first imaginary straight line than the second linear magnetization region.
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公开(公告)号：US20240096351A1
公开(公告)日：2024-03-21
申请号：US18521162
申请日：2023-11-28
Applicant: FUJIFILM CORPORATION
Inventor： Toru NAKAO , Tetsuya KANEKO , Yoichi AKANO
CPC classification number: G11B5/3116 , G11B5/00826
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.
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公开(公告)号：US20230206947A1
公开(公告)日：2023-06-29
申请号：US18145558
申请日：2022-12-22
Applicant: FUJIFILM Corporation
Inventor： Yoichi AKANO , Toru NAKAO , Tetsuya KANEKO
CPC classification number: G11B5/584 , G11B5/00817
Abstract: A processing device stores a result of reading a reference servo pattern by a servo reading element from a magnetic tape in which the reference servo pattern is recorded, in the storage medium as an ideal waveform signal indicating an ideal waveform, acquires a servo band signal which is a result of reading a servo pattern recorded in a servo band of the magnetic tape by the servo reading element, and detects a servo pattern signal which is a result of reading the servo pattern by the servo reading element by comparing the ideal waveform signal stored in the storage medium with the servo band signal. The magnetic tape has a data band. The reference servo pattern is recorded in the data band.
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公开(公告)号：US20230169992A1
公开(公告)日：2023-06-01
申请号：US18059185
申请日：2022-11-28
Applicant: FUJIFILM Corporation
Inventor： Tetsuya Kaneko , Toru Nakao , Yoichi AKANO
CPC classification number: G11B5/00813 , G11B5/78
Abstract: A detection device includes a processor. The processor compares a servo band signal, which is a result of reading a servo band in which a servo pattern is recorded from a magnetic tape including the servo band by a servo reading element, with a threshold value to detect a servo pattern signal indicating the servo pattern. The threshold value is determined in accordance with an angle formed by the servo pattern and the servo reading element.
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5.发明申请公开(公告)号：US20210343312A1
公开(公告)日：2021-11-04
申请号：US17374006
申请日：2021-07-13
Applicant: FUJIFILM CORPORATION
Inventor： Toru NAKAO , Hodaka SUZUKI , Yoichi AKANO
Abstract: A recording and reproducing device includes: a reading unit that reads production information from a recording medium of a magnetic tape cartridge, the magnetic tape cartridge including a magnetic tape, and the recording medium other than the magnetic tape and on which the production information is recorded, the production information being information regarding the magnetic tape obtained in a production process of the magnetic tape cartridge; and a control unit that performs, as an initialization process of the magnetic tape cartridge, control of recording the production information on the magnetic tape and invalidating the production information in the recording medium.
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Patent Agency Ranking
公开(公告)号：US20210090597A1
公开(公告)日：2021-03-25
申请号：US17116715
申请日：2020-12-09
Applicant: FUJIFILM CORPORATION
Inventor： Yoichi AKANO
Abstract: A recording device, a control device, a recording method, a recording tape cartridge, and a data recording and reproducing system capable of accurately positioning a data recording and reproducing head are obtained. A recording device includes a recording unit that records information on linearity of a servo signal recorded on a magnetic tape included in a recording tape cartridge on an RFID tag included in the recording tape cartridge.
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公开(公告)号：US20240379120A1
公开(公告)日：2024-11-14
申请号：US18783932
申请日：2024-07-25
Applicant: FUJIFILM Corporation
Inventor： Tetsuya KANEKO , Toru NAKAO , Yoichi AKANO
Abstract: A detection device includes a processing device and a storage medium. The processing device stores a result of reading a reference servo pattern by a servo reading element in the storage medium as an ideal waveform signal, acquires a servo band signal which is a result of reading a servo pattern recorded in a servo band by the servo reading element, and detects a servo pattern signal which is a result of reading the servo pattern by the servo reading element by comparing the ideal waveform signal with the servo band signal. The reference servo pattern is recorded between a BOT section and an EOT section in a longitudinal direction of the magnetic tape.
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公开(公告)号：US20240144968A1
公开(公告)日：2024-05-02
申请号：US18400011
申请日：2023-12-29
Applicant: FUJIFILM CORPORATION
Inventor： Toru NAKAO , Tetsuya KANEKO , Yoichi AKANO
CPC classification number: G11B5/588 , G11B5/00882 , G11B5/59638
Abstract: A first straight line region and a second straight line region of the straight line region pair are inclined in opposite directions with respect to a first imaginary straight line. 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. A plurality of gap patterns deviate from each other by a predetermined interval in a direction corresponding to a longitudinal direction of the magnetic tape, between the gap patterns adjacent to each other along the direction corresponding to the width direction of the magnetic tape. A substrate is inclined with respect to the first imaginary straight line.
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公开(公告)号：US20230206950A1
公开(公告)日：2023-06-29
申请号：US18145088
申请日：2022-12-22
Applicant: FUJIFILM Corporation
Inventor： Tetsuya KANEKO , Toru NAKAO , Yoichi AKANO
CPC classification number: G11B5/59688 , G11B5/584
Abstract: A detection device includes a processing device and a storage medium. The processing device stores a result of reading a reference servo pattern by a servo reading element in the storage medium as an ideal waveform signal, acquires a servo band signal which is a result of reading a servo pattern recorded in a servo band by the servo reading element, and detects a servo pattern signal which is a result of reading the servo pattern by the servo reading element by comparing the ideal waveform signal with the servo band signal. The reference servo pattern is recorded between a BOT section and an EOT section in a longitudinal direction of the magnetic tape.
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10.发明申请公开(公告)号：US20190287561A1
公开(公告)日：2019-09-19
申请号：US16296214
申请日：2019-03-07
Applicant: FUJIFILM CORPORATION
Inventor： Hodaka SUZUKI , Yoichi AKANO
Abstract: Provided is a magnetic tape, in which servo patterns, each including a first magnetization region formed to be tilted with respect to a width direction of a servo band by an angle θ along the width direction of the servo band and a second magnetization region not parallel to the first magnetization region along the width direction of the servo band, are repeatedly formed in a longitudinal direction of the servo band, the magnetic tape is used in a recording and reproducing system which uses a reproducing element for reproducing the servo pattern, a width of which satisfies W1≤(1/tan θ)×stripe width T of the servo pattern, and the angle θ is greater than 25° and equal to or smaller than 45°.
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