Patents by Inventor Akihiro Naito

Akihiro Naito 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).

  • Publication number: 20240149506
    Abstract: A performance in a technique using a heater for manufacturing a resin molding product is further improved. A method of manufacturing a resin molding product includes: a step of placing a first portion configuring a resin molding product, in a first mold; a step of placing a second portion configuring a resin molding product, in a second mold; a step of inserting a heater between the first mold and the second mold; a step of partially heating the first portion and the second portion by the heater; a step of evacuating the heater; a step of welding the first portion and the second portion; and a step of extracting the resin molding product including the first portion and the second portion.
    Type: Application
    Filed: November 1, 2021
    Publication date: May 9, 2024
    Inventors: Kiyotaka NAKAYAMA, Akihiro NAITO, Takashi UEMURA, Keigo SUSA, Koji MATSUZAKI, Shoso NISHIDA
  • Publication number: 20240149999
    Abstract: A watercraft propulsion system includes a bow thruster at a bow of a hull to generate a lateral propulsive force, at least two propulsion devices on a stern of the hull each having a variable steering angle, and a controller configured or programmed to control the propulsive force of the bow thruster and control the propulsive forces and the steering angles of the two propulsion devices to perform an azimuth control to control an azimuth of the hull. The azimuth control includes a bow thruster mode in which the bow thruster is controlled, and a combinational mode in which the bow thruster is controlled and the two propulsion devices are driven forward and in reverse, respectively. The controller switches between the bow thruster mode and the combinational mode based on a predetermined switching condition during the azimuth control.
    Type: Application
    Filed: November 7, 2023
    Publication date: May 9, 2024
    Inventors: Yuta KUBOTA, Akihiro TAGATA, Katsutoshi NAITO
  • Publication number: 20240152146
    Abstract: A watercraft propulsion system includes a bow thruster, at least two propulsion devices, a translation/bow turning operator to apply a translation command to translate a hull and a bow turning command to turn a bow of the hull, and a controller configured or programmed to drive the bow thruster, and drive one of the at least two propulsion devices forward and another of the at least two propulsion devices in reverse while controlling the steering angles of the at least two propulsion devices so that propulsive force action lines of the at least two propulsion devices cross each other in the hull in a translation watercraft maneuvering mode to translate the hull in response to an operation of the translation/bow turning operator. The controller includes a calibration mode in which calibration is performed for the translation watercraft maneuvering mode.
    Type: Application
    Filed: November 7, 2023
    Publication date: May 9, 2024
    Inventors: Akihiro TAGATA, Katsutoshi NAITO, Makoto ITO
  • Publication number: 20240150000
    Abstract: A watercraft propulsion system includes a bow thruster, at least two propulsion devices, a translation operator to command a hull translation movement, and a controller configured or programmed to, in a translation watercraft maneuvering mode, control the propulsion devices so that propulsive force action lines thereof cross each other in the hull, and to drive one of the propulsion devices forward and drive another of the propulsion device in reverse. In a standby state, the controller is configured or programmed to prevent the bow thruster and the propulsion devices from generating propulsive forces, and set the steering angles of the propulsion devices to translation standby steering angles. In response to the operation of the translation operator, the controller is configured or programmed to cause the bow thruster and the propulsion devices to start generating the propulsive forces, and change the steering angles of the propulsion devices to translation steering angles.
    Type: Application
    Filed: November 7, 2023
    Publication date: May 9, 2024
    Inventors: Akihiro TAGATA, Katsutoshi NAITO
  • Patent number: 11926740
    Abstract: Provided are a resin composition including a compound represented by Formula (1) and a resin, a film and a filter including the resin composition, a liquid crystal display device and a solid-state imaging element including the filter, and a compound suitable as a light absorbing component of the resin composition and the filter. In Formula (1), Dye represents a colorant structural part obtained by removing n1 hydrogen atoms from a squarylium compound having a specific structure. Q1 is a structural part in which energy levels of a highest occupied molecular orbital and a lowest unoccupied molecular orbital satisfy a specific condition. L1 represents a divalent linking group and n1 represents an integer of 1 to 4.
    Type: Grant
    Filed: August 13, 2020
    Date of Patent: March 12, 2024
    Assignee: FUJIFILM Corporation
    Inventors: Daisuke Sasaki, Akihiro Hara, Kunihiko Kodama, Nobutaka Fukagawa, Yu Naito, Hiroki Kuwahara
  • Publication number: 20240051208
    Abstract: An injection molding machine includes a heating cylinder provided with a gas inlet, a screw, a gas cylinder, a pressure reducing valve configured to reduce a primary pressure of a gas from the gas cylinder to a secondary pressure, a gas supply portion configured to supply the gas at the secondary pressure to the gas inlet, a secondary pressure detection device configured to detect the secondary pressure, and a controller. The controller is configured to detect an abnormality by comparing a set pressure set in advance in the injection molding machine with the secondary pressure.
    Type: Application
    Filed: November 17, 2021
    Publication date: February 15, 2024
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventors: Akihiro NAITO, Takuya YUFU
  • Publication number: 20240042664
    Abstract: An injection molding machine includes a heating cylinder having a gas inlet, a screw, a gas cylinder, a pressure reducing valve configured to reduce a primary pressure of a gas from the gas cylinder to a secondary pressure, a gas supply portion configured to supply the gas at the secondary pressure to the gas inlet, an injection material pressure detection device configured to detect an injection material pressure in a vicinity of the gas inlet, and a controller. The controller is configured to detect an abnormality by comparing the injection material pressure with the secondary pressure.
    Type: Application
    Filed: November 17, 2021
    Publication date: February 8, 2024
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventors: Akihiro NAITO, Takuya YUFU
  • Publication number: 20240017452
    Abstract: An injection device (2) of an injection molding machine (1) includes a heating cylinder (18) having a gas introduction port (30) and a screw (19), and a gas supply device (5) is connected to the gas introduction port (30). The gas supply device (5) includes a gas supply source (33) and a gas pressure regulating unit (34). The gas pressure regulating unit (34) regulates a gas pressure and supplies the gas when a gas from the gas supply source (33) is introduced into the gas introduction port (30). Specifically, the gas pressure is caused to change in a molding cycle and is increased to a high pressure in a metering process (61). That is, a pressure increasing period (71) in which the gas pressure increases at least partially overlaps with the metering process (61).
    Type: Application
    Filed: November 17, 2021
    Publication date: January 18, 2024
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventors: Akihiro NAITO, Takuya YUFU
  • Publication number: 20230382033
    Abstract: A heating cylinder heater includes a plurality of infrared heaters disposed around a heating cylinder in a non-contact manner with respect to the heating cylinder, a heat insulating material provided outside the infrared heaters, and a cover configured to cover the heat insulating material. The cover has two or more opening portions, and a part or all of the two or more opening portions are each provided with an opening-closing device that is configured to open and close the corresponding opening portion.
    Type: Application
    Filed: May 23, 2023
    Publication date: November 30, 2023
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventors: Takuya YUFU, Akihiro NAITO, Yasutaka OTSUJI
  • Publication number: 20230382034
    Abstract: An injection molding machine includes a control device configured to output at least one set of operator support information. The operator support information includes a set of support target setting data and control target predicted amount of power. The support target setting data includes at least one piece of setting data configuring a molding condition. The control target predicted amount of power is a predicted amount of power consumption of a control target controlled in association with the support target setting data with respect to a change in the support target setting data.
    Type: Application
    Filed: May 23, 2023
    Publication date: November 30, 2023
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventors: Takuya YUFU, Akihiro Naito, Yasutaka Otsuji
  • Publication number: 20230278270
    Abstract: An injection molding machine for foam molding includes a heating cylinder having a gas injection port, a screw which is drivable in the heating cylinder, a gas supply device configured to supply a gas to the gas injection port, the gas supply device including a valve mechanism in a gas flow path, and a control device. The control device is configured to control the valve mechanism to close the valve mechanism at least once in a molding cycle, and keep the valve mechanism open at least in a measuring step.
    Type: Application
    Filed: February 17, 2023
    Publication date: September 7, 2023
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventors: Akihiro NAITO, Takuya Yufu
  • Publication number: 20220402177
    Abstract: An injection molding machine for foam molding includes: a heating cylinder; a screw disposed in the heating cylinder; and a plurality of inlet portions provided in the heating cylinder and configured to introduce inert gas. An inside of the heating cylinder includes a starvation section on an upstream side in which a pressure of the resin is decreased, and the inert gas from the plurality of inlet portions being to be supplied in the starvation section. Each of the plurality of inlet portions is provided with a check valve or an opening and closing mechanism. A product P×N of an interval P of the plurality of inlet portions and a number N of the inlet portions is 0.5H or more and 1.71H or less with respect to a length H of the starvation section.
    Type: Application
    Filed: May 23, 2022
    Publication date: December 22, 2022
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventors: Akihiro NAITO, Takuya YUFU
  • Patent number: 11504891
    Abstract: The present disclosure relates to a screw of an injection molding machine in which a heating cylinder is formed with a first compression section, a starvation section, and a second compression section, and in which an inert gas is to be introduced into the starvation section. At a portion of the screw corresponding to the first compression section, a barrier flight as a double flight including a combination of a main flight and a sub-flight having a lead angle larger than that of the main flight is formed, and a dam flight having a predetermined-width ring shape is formed, downstream of, i.e., in front of the barrier flight. A seal structure to prevent backflow of the resin may be provided between the dam flight and the starvation section.
    Type: Grant
    Filed: August 23, 2019
    Date of Patent: November 22, 2022
    Assignee: THE JAPAN STEEL WORKS, LTD.
    Inventors: Akihiro Naito, Katsuyuki Araki, Koichi Tamada, Hiromasa Uezono, Hideaki Nakashima
  • Publication number: 20220297361
    Abstract: A melting heater configured to melt joining end surfaces of a pair of semi-molded products in a case where the joining end surfaces are melted and joined to manufacture a molded product, the melting heater including: two glass plates arranged in parallel to each other; and a plurality of element heaters arranged in a unit having a flat plate shape as a whole between the two glass plates, in which the glass plate is subjected to surface processing for controlling infrared rays emitted from the plurality of element heaters.
    Type: Application
    Filed: March 17, 2022
    Publication date: September 22, 2022
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventors: Akihiro NAITO, Takashi Uemura, Ryuki Sakamoto, Shoso Nishida
  • Publication number: 20220126494
    Abstract: The interior of a heating cylinder (2) is divided into a first stage (5) and a second stage (7) due to the shape of a screw (3). A first compression zone in which a resin is compressed is formed in the first stage (5). A starvation zone (7a) in which an inert gas is injected and a second compression zone in which the resin is compressed are formed in the second stage (7). A barrier flight (13) that is obtained by combining a main flight (14) and a sub-flight (15) having a greater lead angle than the main flight is provided to a section of the screw (3), said section corresponding to the first compression zone. A multiple flight is provided to another section of the screw (3), said section corresponding to the second stage (7).
    Type: Application
    Filed: December 24, 2019
    Publication date: April 28, 2022
    Applicant: THE JAPAN STEELWORKS, LTD.
    Inventors: Akihiro NAITO, Koichi TAMADA, Hiromasa UEZONO
  • Publication number: 20210178648
    Abstract: The present disclosure relates to a screw of an injection molding machine in which a heating cylinder is formed with a first compression section, a starvation section, and a second compression section, and in which an inert gas is to be introduced into the starvation section. At a portion of the screw corresponding to the first compression section, a barrier flight as a double flight including a combination of a main flight and a sub-flight having a lead angle larger than that of the main flight is formed, and a dam flight having a predetermined-width ring shape is formed, downstream of, i.e., in front of the barrier flight. A seal structure to prevent backflow of the resin may be provided between the dam flight and the starvation section.
    Type: Application
    Filed: August 23, 2019
    Publication date: June 17, 2021
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventors: Akihiro NAITO, Katsuyuki ARAKI, Koichi TAMADA, Hiromasa UEZONO, Hideaki NAKASHIMA
  • Patent number: 9744698
    Abstract: A method for manufacturing a molded product with fine structure includes steps of, in a temperature-controlled stamper mold provided with a fine structure including a concavo-convex pattern having a width of 10 nm to 1 ?m, forming a thermoplastic molten polymer layer to be in contact with the fine structure 20 of the stamper mold having been kept at a predetermined temperature and holding the thermoplastic molten polymer layer for a predetermined time so as to transfer the fine structure of the stamper mold to the thermoplastic molten polymer layer under gravity.
    Type: Grant
    Filed: December 1, 2011
    Date of Patent: August 29, 2017
    Assignee: THE JAPAN STEEL WORKS, LTD.
    Inventors: Akihiro Naito, Kenichi Furuki, Hiroshi Ito, Kazutoshi Yakemoto
  • Publication number: 20130270743
    Abstract: The present invention is widely applicable to an injection molding method, an injection compression molding method, a blow molding method, a film sheet molding method using a roller and a thermoplastic molten polymer, and the like. An object of the invention is to provide a method for manufacturing a molded product with fine structure, which can transfer-mold a fine structure using any of various thermoplastic molten polymers without particularly requiring a pressurizing apparatus and can afford a nano-scaled fine pattern having a high economical efficiency, a large area, and homogeneous properties.
    Type: Application
    Filed: December 1, 2011
    Publication date: October 17, 2013
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventors: Akihiro Naito, Kenichi Furuki, Hiroshi Ito, Kazutoshi Yakemoto