Patents by Inventor Yuto Murata

Yuto Murata has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11257518
    Abstract: 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 ?m 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 ?m to ?1.1 ?m as a value measured on 100th day from a date of magnetic tape cartridge manufacture.
    Type: Grant
    Filed: March 20, 2020
    Date of Patent: February 22, 2022
    Assignee: FUJIFILM Corporation
    Inventors: Yuto Murata, Norihito Kasada, Yusuke Kagawa
  • Publication number: 20210257001
    Abstract: A magnetic tape device, a magnetic tape, and a magnetic tape cartridge, in which the magnetic tape is caused to run between a winding reel and a cartridge reel in a state where a tension is applied in a longitudinal direction of the magnetic tape and a maximum value of the tension is 0.50 N or more, the magnetic tape after running in a state where the tension is applied is wound around the cartridge reel by applying a tension of 0.40 N or less in the longitudinal direction, and a center line average roughness Ra measured regarding a surface of a back coating layer of the magnetic tape with an atomic force microscope is in a range of 5 to 13 nm.
    Type: Application
    Filed: February 4, 2021
    Publication date: August 19, 2021
    Applicant: FUJIFILM Corporation
    Inventors: Yusuke KANEKO, Yuto MURATA, Norihito KASADA
  • Publication number: 20210241787
    Abstract: The magnetic tape satisfies TDSage+TDSenv?TC?0.30 ?m. 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.
    Type: Application
    Filed: January 28, 2021
    Publication date: August 5, 2021
    Applicant: FUJIFILM Corporation
    Inventors: Yuto MURATA, Yusuke Kaneko, Norihito Kasada
  • Publication number: 20210241795
    Abstract: 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 ?SB exceeds 0.3 ?m. 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.
    Type: Application
    Filed: January 28, 2021
    Publication date: August 5, 2021
    Inventors: Yuto MURATA, Yusuke KANEKO, Norihito KASADA
  • Publication number: 20210201945
    Abstract: 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 ?m/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 ?m/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 ?m/N/° C. or less.
    Type: Application
    Filed: December 22, 2020
    Publication date: July 1, 2021
    Applicant: FUJIFILM Corporation
    Inventors: Norihito KASADA, Yuto Murata, Yusuke Kaneko
  • Patent number: 10902875
    Abstract: 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 ?m, 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 ?m to 12.0 ?m, and the tape width A and the tape width B are values measured 100 days from the date of magnetic tape cartridge manufacture.
    Type: Grant
    Filed: April 15, 2020
    Date of Patent: January 26, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Yusuke Kagawa, Norihito Kasada, Yuto Murata
  • Publication number: 20200302964
    Abstract: In the magnetic tape cartridge, a tape has a tape thickness of 5.3 ?m or less, and a difference Winner?Wouter between a tape width Winner at a position of 50 m±1 m from a tape inner end and a tape width Wouter at a position of 50 m±1 m from a tape outer end is 4.1 ?m to 19.9 ?m as a value measured on 100th day from a date of magnetic tape cartridge manufacture, and a difference Ginner?Gouter between a servo band interval Ginner in a range of 49 m to 51 m from the tape inner end and a servo band interval Gouter in a range of 49 m to 51 m from the tape outer end is ?3.9 ?m to 0.0 ?m as a value measured on 100th day from the date of magnetic tape cartridge manufacture.
    Type: Application
    Filed: March 20, 2020
    Publication date: September 24, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Yuto MURATA, Norihito Kasada, Yusuke Kagawa
  • Publication number: 20200302963
    Abstract: 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 ?m 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 ?m to 1.1 ?m as a value measured on 100th day from a date of magnetic tape cartridge manufacture.
    Type: Application
    Filed: March 20, 2020
    Publication date: September 24, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Yuto Murata, Norihito Kasada, Yusuke Kagawa
  • Publication number: 20200243111
    Abstract: 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 ?m, 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 ?m to 12.0 ?m, and the tape width A and the tape width B are values measured 100 days from the date of magnetic tape cartridge manufacture.
    Type: Application
    Filed: April 15, 2020
    Publication date: July 30, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Yusuke KAGAWA, Norihito KASADA, Yuto MURATA
  • Patent number: 10679659
    Abstract: 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 ?m, 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 ?m to 12.0 ?m, and the tape width A and the tape width B are values measured 100 days from the date of magnetic tape cartridge manufacture.
    Type: Grant
    Filed: February 21, 2019
    Date of Patent: June 9, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Yusuke Kagawa, Norihito Kasada, Yuto Murata
  • Publication number: 20190259417
    Abstract: 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 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 ?m to 12.0 ?m, and the tape width A and the tape width B are values measured 100 days from the date of magnetic tape cartridge manufacture.
    Type: Application
    Filed: February 21, 2019
    Publication date: August 22, 2019
    Inventors: Yusuke KAGAWA, Norihito Kasada, Yuto Murata