Patents by Inventor Masakazu Hirata

Masakazu Hirata 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: 11491787
    Abstract: There are provided a head chip and so on capable of improving the print image quality. The head chip according to an embodiment of the present disclosure is provided with an actuator plate having a plurality of ejection grooves and a nozzle plate having a plurality of nozzle holes individually communicated with the plurality of ejection grooves. The plurality of ejection grooves is arranged side by side so as to at least partially overlap each other along a predetermined direction. Further, the nozzle holes adjacent to each other along the predetermined direction out of the plurality of nozzle holes are arranged so as to be shifted from each other along an extending direction of the ejection grooves in the nozzle plate.
    Type: Grant
    Filed: November 24, 2020
    Date of Patent: November 8, 2022
    Assignee: SII PRINTEK INC.
    Inventors: Tomoki Ai, Yuki Yamamura, Masakazu Hirata, Kenji Suzuki
  • Patent number: 11408795
    Abstract: It is an object of the present invention to enhance reliability of an allowable limit conductance used for setting a threshold value for evaluating sealability of a test object, and further, enhance reliability of the sealability evaluation. By leak testing a test object 9A with a sealing defect 9g, a leakage characteristic that shows a relationship between an internal-external pressure difference and a leak flow rate is obtained. A conductance of a test object with a similar artificial leak 9B having a similar artificial leak device 29 disposed therein, conducting the leak-detected substance is measured. The similar artificial leak device 29 has a leakage characteristic similar to the obtained leakage characteristic. An allowable limit conductance is obtained based on results of the measurement. Sealability of a test object 9 is evaluated based on a threshold value set with a standard artificial leak device 9S having the allowable limit conductance.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: August 9, 2022
    Assignee: Fukuda Co., Ltd.
    Inventors: Yasuhiko Higuchi, Masakazu Ito, Yuho Matsui, Mao Hirata
  • Publication number: 20220184941
    Abstract: There are provided a characteristic table generation system and so on capable of enhancing the convenience of the user.
    Type: Application
    Filed: December 13, 2021
    Publication date: June 16, 2022
    Inventors: Takayuki SHIMIZU, Masakazu HIRATA
  • Patent number: 11254132
    Abstract: There is provided a head chip and so on capable of achieving the reduction in power consumption and the improvement in print image quality while suppressing the manufacturing cost of the head chip. The head chip according to an embodiment of the present disclosure includes an actuator plate having a plurality of ejection grooves and a plurality of electrodes, a nozzle plate having a plurality of nozzle holes, and a cover plate having a wall part, a first through hole, and a second through hole. The plurality of nozzle holes includes a plurality of first nozzle holes arranged so as to be shifted toward the first through hole, and a plurality of second nozzle holes arranged so as to be shifted toward the second through hole. In a first ejection groove communicated with the first nozzle hole, a first cross-sectional area of a part communicated with the first through hole is smaller than a second cross-sectional area of a part communicated with the second through hole.
    Type: Grant
    Filed: November 25, 2020
    Date of Patent: February 22, 2022
    Assignee: SII PRINTEK INC.
    Inventors: Masakazu Hirata, Yuzuru Kubota, Yuki Yamamura, Tomoki Ai
  • Patent number: 11225079
    Abstract: There are provided a head chip and so on capable of improving the print image quality while suppressing the manufacturing cost. The head chip according to an embodiment of the present disclosure includes an actuator plate having a plurality of ejection grooves, a nozzle plate having a plurality of nozzle holes, and a cover plate having a first through hole, a second through hole, and a wall part. The plurality of nozzle holes includes a plurality of first nozzle holes arranged so as to be shifted toward the first through hole, and a plurality of second nozzle holes arranged so as to be shifted toward the second through hole. In a first ejection groove communicated with the first nozzle hole, a first cross-sectional area of a part communicated with the first through hole is smaller than a second cross-sectional area of a part communicated with the second through hole.
    Type: Grant
    Filed: November 25, 2020
    Date of Patent: January 18, 2022
    Assignee: SII PRINTEK INC.
    Inventors: Masakazu Hirata, Kenji Suzuki, Masanori Tamura
  • Publication number: 20210162757
    Abstract: There is provided a head chip and so on capable of achieving the reduction in power consumption and the improvement in print image quality while suppressing the manufacturing cost of the head chip. The head chip according to an embodiment of the present disclosure includes an actuator plate having a plurality of ejection grooves and a plurality of electrodes, a nozzle plate having a plurality of nozzle holes, and a cover plate having a wall part, a first through hole, and a second through hole. The plurality of nozzle holes includes a plurality of first nozzle holes arranged so as to be shifted toward the first through hole, and a plurality of second nozzle holes arranged so as to be shifted toward the second through hole. In a first ejection groove communicated with the first nozzle hole, a first cross-sectional area of a part communicated with the first through hole is smaller than a second cross-sectional area of a part communicated with the second through hole.
    Type: Application
    Filed: November 25, 2020
    Publication date: June 3, 2021
    Inventors: Masakazu HIRATA, Yuzuru KUBOTA, Yuki YAMAMURA, Tomoki AI
  • Publication number: 20210162756
    Abstract: There are provided a head chip and so on capable of improving the print image quality while suppressing the manufacturing cost. The head chip according to an embodiment of the present disclosure includes an actuator plate having a plurality of ejection grooves, a nozzle plate having a plurality of nozzle holes, and a cover plate having a first through hole, a second through hole, and a wall part. The plurality of nozzle holes includes a plurality of first nozzle holes arranged so as to be shifted toward the first through hole, and a plurality of second nozzle holes arranged so as to be shifted toward the second through hole. In a first ejection groove communicated with the first nozzle hole, a first cross-sectional area of a part communicated with the first through hole is smaller than a second cross-sectional area of a part communicated with the second through hole.
    Type: Application
    Filed: November 25, 2020
    Publication date: June 3, 2021
    Inventors: Masakazu HIRATA, Kenji SUZUKI, Masanori TAMURA
  • Publication number: 20210162754
    Abstract: There are provided a head chip and so on capable of improving the print image quality. The head chip according to an embodiment of the present disclosure is provided with an actuator plate having a plurality of ejection grooves and a nozzle plate having a plurality of nozzle holes individually communicated with the plurality of ejection grooves. The plurality of ejection grooves is arranged side by side so as to at least partially overlap each other along a predetermined direction. Further, the nozzle holes adjacent to each other along the predetermined direction out of the plurality of nozzle holes are arranged so as to be shifted from each other along an extending direction of the ejection grooves in the nozzle plate.
    Type: Application
    Filed: November 24, 2020
    Publication date: June 3, 2021
    Inventors: Tomoki Ai, Yuki Yamamura, Masakazu Hirata, Kenji Suzuki
  • Patent number: 10814630
    Abstract: Provided herein are a jet hole plate, a liquid jet head, a liquid jet recording apparatus, and a method for manufacturing a jet hole plate that can achieve a long life. A jet hole plate according to an embodiment of the present disclosure is a jet hole plate for use in a liquid jet head. The jet hole plate includes a metal substrate having provided therein a plurality of jet holes. The metal substrate has a principal surface having outlets for the jet holes. The principal surface has a surface roughness (arithmetic mean roughness Ra) that is smaller in outlet edge regions of the jet holes than in surrounding regions around the outlet edge regions.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: October 27, 2020
    Assignee: SII PRINTEK INC.
    Inventors: Masakazu Hirata, Kenji Takano, Tomoki Sodetai
  • Patent number: 10710366
    Abstract: Provided herein are a jet hole plate, a liquid jet head, and a liquid jet recording apparatus that can achieve a long life. A jet hole plate according to an embodiment of the present disclosure is a jet hole plate for use in a liquid jet head. The jet hole plate includes a metal substrate provided with a plurality of jet holes. In the metal substrate, an average crystal grain size in outlet edges of the jet holes is smaller than that in surrounding regions around the outlet edges.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: July 14, 2020
    Assignee: SII Printek Inc.
    Inventors: Masakazu Hirata, Kenji Takano, Emiko Osaka
  • Publication number: 20190143693
    Abstract: Provided herein is a method for manufacturing a jet hole plate that can improve ejection stability and head durability. A method for manufacturing a jet hole plate according to an embodiment of the present disclosure includes a punching step of pressing a first principal surface of a metal substrate with a punch to form an indentation in the first principal surface, and to form a raised portion in a second principal surface of the metal substrate at a position opposite to the indentation; a first polishing step of removing the raised portion by mechanical polishing to penetrate the metal substrate at the indentation to thereby form a jet hole; and a second polishing step of polishing at least one of the first principal surface and the second principal surface of the metal substrate by chemical polishing, electrolytic polishing, or chemical-mechanical polishing.
    Type: Application
    Filed: November 13, 2018
    Publication date: May 16, 2019
    Inventors: Emiko OSAKA, Masakazu HIRATA, Shutaro YAMAMOTO, Kenji TAKANO, Takashi HITOMI
  • Publication number: 20190143686
    Abstract: Provided herein are a jet hole plate, a liquid jet head, and a liquid jet recording apparatus that can achieve a long life. A jet hole plate according to an embodiment of the present disclosure is a jet hole plate for use in a liquid jet head. The jet hole plate includes a metal substrate provided with a plurality of jet holes. In the metal substrate, an average crystal grain size in outlet edges of the jet holes is smaller than that in surrounding regions around the outlet edges.
    Type: Application
    Filed: November 13, 2018
    Publication date: May 16, 2019
    Inventors: Masakazu HIRATA, Kenji TAKANO, Emiko OSAKA
  • Publication number: 20190143692
    Abstract: Provided herein are a jet hole plate, a liquid jet head, a liquid jet recording apparatus, and a method for manufacturing a jet hole plate that can achieve a long life. A jet hole plate according to an embodiment of the present disclosure is a jet hole plate for use in a liquid jet head. The jet hole plate includes a metal substrate having provided therein a plurality of jet holes. The metal substrate has a principal surface having outlets for the jet holes. The principal surface has a surface roughness (arithmetic mean roughness Ra) that is smaller in outlet edge regions of the jet holes than in surrounding regions around the outlet edge regions.
    Type: Application
    Filed: November 13, 2018
    Publication date: May 16, 2019
    Inventors: Masakazu HIRATA, Kenji TAKANO, Tomoki SODETAI
  • Patent number: 8982494
    Abstract: A head gimbal assembly has a suspension configured to extend along a surface of a recording medium and to bend and deform in a thickness direction of the recording medium. A slider is provided on a front end side of the suspension so as to confront the surface of the recording medium. A support section supports the slider such that the slider can pivot about two axes parallel to the surface of the recording medium and perpendicular to each other. An optical waveguide is connected to the slider and is configured to introduce a light flux into the slider. A near-field light generating element generates near-field light from the optical flux and causes the near-field light to record information on the recording medium. A positioning section is mounted between the support section and the slider for positioning the optical waveguide relative to the slider.
    Type: Grant
    Filed: July 10, 2009
    Date of Patent: March 17, 2015
    Assignee: Seiko Instruments Inc.
    Inventors: Masakazu Hirata, Manabu Oumi, Majung Park, Sachiko Tanabe
  • Patent number: 8945733
    Abstract: A magnetic recording medium in which information can be recorded using a heat-assisted magnetic recording method comprises a recording layer formed on a substrate. The recording layer has a plurality of magnetic recording bit regions and a plurality of high thermal conductors each extending inside a corresponding one of the bit regions. The high thermal conductors have a thermal conductivity higher than that of the recording layer and assist in dissipating heat energy imparted to the bit regions during the recording of information.
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: February 3, 2015
    Assignee: Seiko Instruments Inc.
    Inventors: Yoshikazu Tanaka, Norio Chiba, Manabu Oumi, Masakazu Hirata, Yoko Shinohara, Sachiko Tanabe
  • Patent number: 8905805
    Abstract: A U-shaped groove and a V-shaped groove are formed onto a cladding disposed on a substrate, a core and a metal structure are formed inside the grooves, respectively, and then the substrate surface is planarized. Further, after a cladding is formed again, the substrate is cut and the cut surface is polished such that the metal structure inside the V-shaped groove has a predetermined thickness, thereby forming a scattering body.
    Type: Grant
    Filed: February 9, 2012
    Date of Patent: December 9, 2014
    Assignee: Seiko Instruments Inc.
    Inventors: Yoko Shinohara, Norio Chiba, Manabu Oumi, Masakazu Hirata, Sachiko Tanabe, Yoshikazu Tanaka
  • Patent number: 8842504
    Abstract: A near-field light head of the present invention includes: a slider disposed opposite to a surface of the magnetic recording medium; a recording element that includes a main magnetic pole generating the recording magnetic field and a subsidiary magnetic pole, the recording element being fixed to an apical surface of the slider so that the main magnetic pole and the subsidiary magnetic pole line up in a longitudinal direction of the slider in the state where the subsidiary magnetic pole is located at the apical surface of the slider; a near-field light generating element, fixed adjacently to the main magnetic pole in a state where another end side thereof is directed to the magnetic recording medium, that propagates the light flux introduced from one end side thereof toward the other end side to generate the near-field light, and radiates the near-field light from the other end side to the outside; and a light flux introducing device, fixed to the slider, that introduces the light flux from the one end side in
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: September 23, 2014
    Assignee: Seiko Instruments Inc.
    Inventors: Masakazu Hirata, Manabu Oumi, Majung Park
  • Patent number: 8787127
    Abstract: A near-field light generating element has a core that propagates light flux from a light incident side to a light emission side while focusing the propagating light flux. A near-field light generating portion in the form of a metal film generates near-field light from the light flux. The core includes a first core, and a second core covering a side surface of the first core, and the core is formed in a polygonal shape when viewed from a Z direction. The metal film is placed on a side surface in the core, and is formed so that a width of an interface between the metal film and the core is narrower than a width of the side surface of the core.
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: July 22, 2014
    Assignee: Seiko Instruments Inc.
    Inventors: Masakazu Hirata, Norio Chiba, Manabu Oumi, Yoko Shinohara, Sachiko Tanabe, Yoshikazu Tanaka
  • Patent number: D784735
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: April 25, 2017
    Assignees: FUJI ELECTRIC CO., LTD., SEVEN-ELEVEN JAPAN CO., LTD.
    Inventor: Masakazu Hirata
  • Patent number: D860705
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: September 24, 2019
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Masakazu Hirata, Takayuki Tsutsui, Hiroyuki Toyoda