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公开(公告)号：US11996125B2
公开(公告)日：2024-05-28
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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公开(公告)号：US11183208B2
公开(公告)日：2021-11-23
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：US11183206B2
公开(公告)日：2021-11-23
申请号：US17029095
申请日：2020-09-23
Applicant: FUJIFILM CORPORATION
Inventor： Hodaka Suzuki , Toru Nakao , Yoichi Akano
Abstract: A magnetic tape cartridge including: a magnetic tape; and a recording medium including a predetermined area for recording defect information, which is information regarding a defect of the magnetic tape detected in a production process of the magnetic tape. A recording device, a recording method, a data recording and reproducing system, and a data recording and reproducing method are also provided.
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公开(公告)号：US11908498B2
公开(公告)日：2024-02-20
申请号：US17950142
申请日：2022-09-22
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：US11894027B2
公开(公告)日：2024-02-06
申请号：US17950143
申请日：2022-09-22
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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Patent Agency Ranking
公开(公告)号：US10607644B2
公开(公告)日：2020-03-31
申请号：US16414764
申请日：2019-05-16
Applicant: FUJIFILM CORPORATION
Inventor： Hodaka Suzuki , Yoichi Akano
Abstract: A magnetic tape includes: a servo band on which servo patterns are repeatedly formed in a longitudinal direction thereof, each of the servo patterns including a first magnetization region formed to be tilted with respect to a width direction of the servo band by a predetermined angle 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, wherein at least one of the first magnetization region or the second magnetization region is formed by decreasing the number of linear patterns from a predetermined plural number of linear patterns and changing a position of the linear pattern to be removed, in accordance with information that is an embedding target so that the information is embedded.
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公开(公告)号：US12243564B2
公开(公告)日：2025-03-04
申请号：US18405166
申请日：2024-01-05
Applicant: FUJIFILM Corporation
Inventor： Toru Nakao , Tetsuya Kaneko , Yoichi Akano
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.
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公开(公告)号：US12073859B2
公开(公告)日：2024-08-27
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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公开(公告)号：US20230317108A1
公开(公告)日：2023-10-05
申请号：US18172693
申请日：2023-02-22
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.
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公开(公告)号：US20230139005A1
公开(公告)日：2023-05-04
申请号：US18050231
申请日：2022-10-27
Applicant: FUJIFILM Corporation
Inventor： Toru NAKAO , Tetsuya Kaneko , Yoichi Akano
IPC: 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.
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