Patents by Inventor Takanobu Iwama

Takanobu Iwama 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: 11450345
    Abstract: A magnetic recording medium that can exhibit good traveling performance during use is provided. This magnetic recording medium is a tape-shaped magnetic recording medium, and includes a substrate including a polyester as a main component, a base layer disposed on the substrate, and a magnetic layer disposed on the base layer. The kurtosis of the surface of the magnetic layer is 3.0 or more. The base layer and the magnetic layer each include a lubricant including a fatty acid and a fatty acid ester. In the lubricant, a ratio of the content of the fatty acid to the content of the fatty acid ester is less than 0.6.
    Type: Grant
    Filed: October 1, 2019
    Date of Patent: September 20, 2022
    Assignee: Sony Corporation
    Inventors: Minoru Yamaga, Takanobu Iwama, Jun Takahashi
  • Patent number: 11443767
    Abstract: A magnetic recording tape having a plural-layer structure including at least a magnetic layer is provided. The tape has a total thickness of 5.6 ?m or smaller, and includes a plurality of indentations disposed in a surface of the magnetic layer. A value obtained by dividing a depth D1 of each indentation with a thickness D2 of the magnetic layer is 15% or greater. The magnetic layer includes a plurality of indentations formed therein, a plurality of the indentations each has a depth of 20% or greater of the thickness of the magnetic layer, and the number of the indentations is 55 or more per 6,400 ?m2 of a surface area of the magnetic layer.
    Type: Grant
    Filed: November 19, 2018
    Date of Patent: September 13, 2022
    Assignee: Sony Corporation
    Inventors: Minoru Yamaga, Takanobu Iwama, Jun Takahashi
  • Patent number: 11423946
    Abstract: A cartridge is provided and includes tape-shaped magnetic recording medium; and cartridge memory; wherein cartridge memory includes communication unit that communicates with recording/reproducing device in state where cartridge is loaded on recording/reproducing device; storage unit; and control unit that stores, reads, and transmits information, wherein information includes manufacturing information of cartridge and adjustment information for adjusting a tension applied to the tape-shaped magnetic recording medium in a longitudinal direction of tape-shaped magnetic recording medium thereof, tape-shaped magnetic recording medium has a plurality of servo bands, and wherein a temperature expansion coefficient ? of the tape-shaped magnetic recording medium satisfies 6 ppm/° C.???8 ppm/° C.
    Type: Grant
    Filed: August 30, 2021
    Date of Patent: August 23, 2022
    Assignee: Sony Group Corporation
    Inventors: Eiji Nakashio, Kazuo Anno, Shinya Tochikubo, Takanobu Iwama
  • Publication number: 20220254370
    Abstract: [Solving Means] A cartridge according to the present technology includes: a cartridge case; and a memory. The cartridge case houses a magnetic tape. The memory is provided in the cartridge case, the memory storing information before data recording by the magnetic tape, the information being for adjusting, during data recording or during data reproduction by the magnetic tape, a width of the magnetic tape.
    Type: Application
    Filed: January 6, 2020
    Publication date: August 11, 2022
    Inventors: Minoru YAMAGA, Eiji NAKASHIO, Kazuo ANNO, Takanobu IWAMA, Naohiro ADACHI, Shinya TOCHIKUBO
  • Patent number: 11393506
    Abstract: [Object] A cartridge memory according to an embodiment of the present technology is a cartridge memory for a recording medium cartridge, including: a memory unit; and a capacity setting unit. The memory unit has a memory capacity capable of storing management information relating to a second information recording medium configured to be capable of recording information with a second data track number larger than a first data track number. The capacity setting unit is configured to be capable of setting a data storage area limited to a first capacity capable of storing management information relating to a first information recording medium configured to be capable of recording information with the first data track number.
    Type: Grant
    Filed: March 31, 2021
    Date of Patent: July 19, 2022
    Assignee: Sony Corporation
    Inventors: Eiji Nakashio, Kazuo Anno, Takanobu Iwama, Shinya Tochikubo, Naohiro Adachi, Minoru Yamaga, Masayoshi Abe
  • Publication number: 20220208222
    Abstract: A magnetic recording medium that can exhibit good traveling performance during use is provided. This magnetic recording medium is a tape-shaped magnetic recording medium, and includes a substrate including a polyester as a main component, a base layer disposed on the substrate, a magnetic layer disposed on the base layer, and a back layer disposed on a side of the substrate opposite to the base layer. A surface of the back layer opposite to the substrate has a kurtosis of 2.0 or more. On a surface of the magnetic layer, recesses having a depth of 20% or more of the average thickness of the magnetic layer are formed at a ratio of 10 or more and 200 or less per 1600 ?m2. A surface of the magnetic layer has arithmetic average roughness Ra of 2.5 nm or less. The entire magnetic recording medium has a BET specific surface area of 3.5 m2/g or more in a state where the lubricant has been removed from the magnetic recording medium and the magnetic recording medium has been dried.
    Type: Application
    Filed: October 1, 2019
    Publication date: June 30, 2022
    Inventors: Minoru YAMAGA, Takanobu IWAMA, Jun TAKAHASHI
  • Patent number: 11373681
    Abstract: A cartridge memory used for a tape cartridge, the cartridge memory including a communication unit that performs wireless communication, a control unit that transmits data to a recording/reproduction device according to a first communication standard via the communication unit, receives data from the recording/reproduction device according to the first communication standard via the communication unit, and transmits data to an information terminal according to a second communication standard via the communication unit, and a storage unit that stores data related to the tape cartridge.
    Type: Grant
    Filed: August 2, 2019
    Date of Patent: June 28, 2022
    Assignee: Sony Corporation
    Inventors: Shinya Tochikubo, Takanobu Iwama, Kazuo Anno, Eiji Nakashio, Naohiro Adachi, Minoru Yamaga, Masayoshi Abe, Munetake Ebihara
  • Publication number: 20220199115
    Abstract: A magnetic recording medium that can exhibit good traveling performance during use is provided. This magnetic recording medium is a tape-shaped magnetic recording medium, and includes a substrate, a base layer disposed on the substrate, and a magnetic layer disposed on the base layer. The substrate includes a polyester as a main component. The average thickness of the base layer is 0.9 ?m or less. The base layer and the magnetic layer each include a lubricant. The magnetic layer has a surface having a large number of holes, and the arithmetic average roughness Ra of the surface is 2.5 nm or less. The BET specific surface area of the entire magnetic recording medium is 3.5 m2/g or more in a state where the lubricant has been removed from the magnetic recording medium and the magnetic recording medium has been dried. The squareness ratio in the perpendicular direction is 65% or more. The average thickness of the magnetic layer is 90 nm or less. The average thickness of the magnetic recording medium is 5.
    Type: Application
    Filed: October 1, 2019
    Publication date: June 23, 2022
    Inventors: Kazuya HASHIMOTO, Minoru YAMAGA, Takanobu IWAMA, Jun TAKAHASHI
  • Patent number: 11348615
    Abstract: A cartridge memory is a cartridge memory used in a magnetic tape cartridge, including: an antenna unit; a storage unit that stores data; and a control unit that reads the data from the storage unit in response to a request from a recording/reproduction apparatus, adds an error correction code to the data, and transmits the obtained data via the antenna unit.
    Type: Grant
    Filed: October 21, 2019
    Date of Patent: May 31, 2022
    Assignee: Sony Corporation
    Inventors: Kazuo Anno, Takanobu Iwama, Shinya Tochikubo, Eiji Nakashio, Naohiro Adachi
  • Publication number: 20220165302
    Abstract: An object is to provide a magnetic recording medium having excellent traveling stability and a thin total thickness. The present technology provides a tape-shaped magnetic recording medium including: a magnetic layer; an underlayer; a base layer; and a back layer, in which a surface on a side of the magnetic layer has a kurtosis of 3.0 or more, a surface on a side of the back layer has a kurtosis of 2.0 or more, the surface on the magnetic layer side has arithmetic average roughness Ra of 2.5 nm or less, the base layer includes a polyester as a main component, the magnetic recording medium has an average thickness tT of 5.6 ?m or less, the magnetic recording medium includes a lubricant, the lubricant includes a fatty acid and a fatty acid ester, and a mass ratio between the fatty acid and the fatty acid ester extracted with hexane satisfies fatty acid/fatty acid ester ?0.
    Type: Application
    Filed: October 3, 2019
    Publication date: May 26, 2022
    Inventors: Minoru YAMAGA, Takanobu IWAMA, Jun TAKAHASHI
  • Publication number: 20220165303
    Abstract: A magnetic recording medium that can exhibit good traveling performance during use is provided. This magnetic recording medium is a tape-shaped magnetic recording medium, and includes a substrate including a polyester as a main component, a base layer disposed on the substrate, and a magnetic layer disposed on the base layer. The kurtosis of the surface of the magnetic layer is 3.0 or more. The base layer and the magnetic layer each include a lubricant including a fatty acid and a fatty acid ester. In the lubricant, a ratio of the content of the fatty acid to the content of the fatty acid ester is less than 0.6.
    Type: Application
    Filed: October 1, 2019
    Publication date: May 26, 2022
    Inventors: Minoru YAMAGA, Takanobu IWAMA, Jun TAKAHASHI
  • Patent number: 11328742
    Abstract: A cartridge memory used for a tape cartridge includes: a communication unit that communicates with a recording and reproducing device using a wireless communication method defined by an ISO 14443-2 standard which is a wireless communication standard; a non-volatile memory with a storage capacity exceeding 16 KB; and a control unit that writes or reads data to or from the non-volatile memory on a word-by-word basis (2 bytes at a time) or on a block-by-block basis (32 bytes at a time). The non-volatile memory includes a plurality of memory banks each having a storage capacity of 128 KB or less. The control unit writes or reads data defined by a magnetic tape standard to or from one or two or more first memory banks among the plurality of the memory banks, and writes or reads additional data to or from one or two or more second memory banks other than the first memory bank.
    Type: Grant
    Filed: April 19, 2021
    Date of Patent: May 10, 2022
    Assignee: Sony Group Corporation
    Inventors: Naohiro Adachi, Eiji Nakashio, Kazuo Anno, Shinya Tochikubo, Minoru Yamaga, Takanobu Iwama, Masayoshi Abe
  • Patent number: 11302351
    Abstract: A magnetic recording medium according to the present technology includes: a base material; and a magnetic layer, in which the magnetic recording medium has a tape shape that is long in a longitudinal direction and short in a width direction, the magnetic layer includes a data band and a servo band, a data signal being written to the data band, the data band being long in the longitudinal direction, a servo signal being written to the servo data, the servo band being long in the longitudinal direction, the degree of perpendicular orientation of the magnetic layer being 65% or more, a full width at half maximum of an isolated waveform in a reproduced waveform of the servo signal is 195 nm or less, the magnetic layer has a thickness of 90 nm or less, and the base material has a thickness of 4.2 ?m or less.
    Type: Grant
    Filed: November 19, 2018
    Date of Patent: April 12, 2022
    Assignee: Sony Corporation
    Inventors: Minoru Yamaga, Takanobu Iwama, Jun Takahashi
  • Publication number: 20210390984
    Abstract: A cartridge is provided and includes tape-shaped magnetic recording medium; and cartridge memory; wherein cartridge memory includes communication unit that communicates with recording/reproducing device in state where cartridge is loaded on recording/reproducing device; storage unit; and control unit that stores, reads, and transmits information, wherein information includes manufacturing information of cartridge and adjustment information for adjusting a tension applied to the tape-shaped magnetic recording medium in a longitudinal direction of tape-shaped magnetic recording medium thereof, tape-shaped magnetic recording medium has a plurality of servo bands, and wherein a temperature expansion coefficient ? of the tape-shaped magnetic recording medium satisfies 6 ppm/° C.???8 ppm/° C.
    Type: Application
    Filed: August 30, 2021
    Publication date: December 16, 2021
    Inventors: Eiji NAKASHIO, Kazuo ANNO, Shinya TOCHIKUBO, Takanobu IWAMA
  • Publication number: 20210383836
    Abstract: A cartridge memory is a cartridge memory used in a magnetic tape cartridge, including: an antenna unit; a storage unit that stores data; and a control unit that reads the data from the storage unit in response to a request from a recording/reproduction apparatus, adds an error correction code to the data, and transmits the obtained data via the antenna unit.
    Type: Application
    Filed: October 21, 2019
    Publication date: December 9, 2021
    Inventors: Kazuo ANNO, Takanobu IWAMA, Shinya TOCHIKUBO, Eiji NAKASHIO, Naohiro ADACHI
  • Publication number: 20210366514
    Abstract: A cartridge memory is a cartridge memory used in a recording medium cartridge and includes an antenna section that induces an induced voltage by means of electromagnetic induction, a load modulation section including a load whose magnitude is variable, and a control section that measures the induced voltage and controls the load modulation section on the basis of the measured induced voltage.
    Type: Application
    Filed: October 21, 2019
    Publication date: November 25, 2021
    Inventors: Shinya TOCHIKUBO, Takanobu IWAMA, Eiji NAKASHIO, Kazuo ANNO, Naohiro ADACHI
  • Patent number: 11183209
    Abstract: A magnetic recording medium in a shape of a tape that is long in a longitudinal direction and is short in a width direction is provided, the medium including: a base material; and a magnetic layer, in which the magnetic layer includes a data band long in the longitudinal direction in which a data signal is to be written, and a servo band long in the longitudinal direction in which a servo signal is written, and in the magnetic layer, a degree of vertical orientation is greater than or equal to 65%, a half width of a solitary waveform in a reproduction waveform of the servo signal is less than or equal to 195 nm, a thickness of the magnetic layer is less than or equal to 90 nm, and a thickness of the base material is less than or equal to 4.2 ?m.
    Type: Grant
    Filed: February 18, 2019
    Date of Patent: November 23, 2021
    Assignee: Sony Corporation
    Inventors: Minoru Yamaga, Tooru Sato, Toshiaki Miura, Takanobu Iwama, Jun Takahashi
  • Patent number: 11145329
    Abstract: A recording medium cartridge according to an embodiment of the present technology includes: an information recording medium; a first cartridge memory; and a second cartridge memory. The first cartridge memory is capable of storing first information relating to the information recording medium, and includes a non-contact communication medium capable of reading/writing the first information via a first communication device disposed in a drive device. The second cartridge memory is capable of storing second information relating to the information recording medium, and is configured to be capable of reading the second information via a second communication device.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: October 12, 2021
    Assignee: Sony Corporation
    Inventors: Kazuo Anno, Eiji Nakashio, Takanobu Iwama, Naohiro Adachi, Shinya Tochikubo, Masayoshi Abe
  • Patent number: 11107505
    Abstract: A cartridge includes a tape-shaped magnetic recording medium and a cartridge memory. The cartridge memory includes a communication unit that communicates with a recording/reproducing device in a state where the cartridge is loaded on the recording/reproducing device; a storage unit; and a control unit that stores information received from the recording/reproducing device through the communication unit in the storage unit, reads the information from the storage unit according to a request from the recording/reproducing device, and transmits the information to the recording/reproducing device through the communication unit. The information includes manufacturing information of the cartridge and adjustment information for adjusting a tension applied to the magnetic recording medium in a longitudinal direction thereof, and the tape-shaped magnetic recording medium has a plurality of servo bands.
    Type: Grant
    Filed: May 28, 2020
    Date of Patent: August 31, 2021
    Assignee: Sony Corporation
    Inventors: Eiji Nakashio, Kazuo Anno, Shinya Tochikubo, Takanobu Iwama
  • Publication number: 20210249044
    Abstract: A cartridge according to the present technology includes: a cartridge case; and a memory. The cartridge case houses a magnetic tape. The memory is provided in the cartridge case, the memory storing information during data recording by the magnetic tape, the information being for adjusting a width of the magnetic tape during data reproduction by the magnetic tape.
    Type: Application
    Filed: June 12, 2019
    Publication date: August 12, 2021
    Applicant: Sony Corporation
    Inventors: Eiji NAKASHIO, Kazuo ANNO, Takanobu IWAMA, Shinya TOCHIKUBO, Naohiro ADACHI