Patents by Inventor Masaru Kumagai

Masaru Kumagai 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: 20250144887
    Abstract: A three-dimensional object printing system includes: a three-dimensional object printing apparatus including a print head that discharges a liquid toward a three-dimensional workpiece, and a robot that holds the print head; and a server communicatively connected to the three-dimensional object printing apparatus, the server acquires workpiece information regarding the workpiece, and generates, based on the workpiece information, a print path that is a path on which the print head moves with respect to the workpiece.
    Type: Application
    Filed: November 1, 2024
    Publication date: May 8, 2025
    Inventors: Yoshinori NAKAJIMA, Masaru KUMAGAI, Kohei UTSUNOMIYA, Yuichiro MATSUURA
  • Patent number: 12257774
    Abstract: A three-dimensional object printing apparatus includes a liquid discharge head having a nozzle surface, a moving mechanism that changes a position and a pose of the liquid discharge head relative to a three-dimensional workpiece, and a controller. The workpiece has a first surface and a second surface that forms a corner bent or curved in a concave shape between the first surface and the second surface. When an axis along a scanning direction of the liquid discharge head with respect to the workpiece in a first printing operation of performing printing on the first surface is a first scanning axis and a normal vector of the nozzle surface in the first printing operation is a first discharge vector, the controller controls the driving of the moving mechanism such that the first discharge vector has a component in a direction toward the second surface along the first scanning axis.
    Type: Grant
    Filed: June 27, 2021
    Date of Patent: March 25, 2025
    Assignee: Seiko Epson Corporation
    Inventor: Masaru Kumagai
  • Patent number: 12179502
    Abstract: A three-dimensional printing device includes a first head having a first nozzle array that ejects liquid, a second head having a second nozzle array that ejects liquid, and a moving mechanism having a linear motion mechanism that changes relative positions of the heads with respect to a three-dimensional workpiece. The first region of the workpiece is more inclined with respect to the first axis than the second region of the workpiece. A time period when the first nozzle array faces the first region and the second nozzle array faces the second region is a first time period. In the first time period, the first nozzle array ejects the liquid onto the first region in a first ejection cycle. In the first time period, the second nozzle array ejects the liquid onto the second region in a second ejection cycle. The first ejection cycle is shorter than the second ejection cycle.
    Type: Grant
    Filed: September 21, 2022
    Date of Patent: December 31, 2024
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Keigo Sugai, Masaru Kumagai
  • Publication number: 20240428969
    Abstract: A coil device includes a first tubular part 41, a first bobbin 40 including a terminal block 42 provided with a terminal 30b, a first wound part 11 placed on the first tubular part 41, a first wire 10 pulled out from the first wound part 11 and connected to the terminal 30b, a second tubular part 51 accommodating the first tubular part 41, a second tubular part 21 placed on the second tubular part 51, and a second wire 20 including a second part 22b pulled out from the second wound part 21 to the opposite side to the first lead-out part 12b. An intermediate part has a corrugation on the outer surface.
    Type: Application
    Filed: June 14, 2024
    Publication date: December 26, 2024
    Applicant: TDK CORPORATION
    Inventors: Atsushi Shoji, Masaru Kumagai
  • Publication number: 20240314420
    Abstract: A car body inspection device includes an illuminator to emit light to an inspection surface of a car body conveyed in one direction; an imager to capture an image of the inspection surface illuminated with the light emitted from the illuminator; and a defect detector to detect a defect of the inspection surface with the image captured by the imager. The illuminator is spaced apart from the car body and located on a first surface side of the car body. The imager is spaced apart from the car body and located on a second surface side opposite the first surface side with the car body intervening between the first surface side and the second surface side.
    Type: Application
    Filed: March 6, 2024
    Publication date: September 19, 2024
    Inventors: Makoto HIRAKAWA, Teruki KAMADA, Masaru KUMAGAI, Makoto HINO, Rie HIRAYAMA
  • Publication number: 20240286350
    Abstract: A printing apparatus includes a head that ejects liquid, a robot that includes a base portion and a distal end portion supporting the head and changes a relative position of the head with respect to the base portion, and a moving mechanism that moves a work relative to the base portion. A first printing operation in which the head ejects the liquid onto a first region in a printing region and a second printing operation in which the head ejects the liquid onto a second region in the printing region are performed. A main scan movement operation in which the moving mechanism moves the work relative to the base portion in the main scan direction is performed. The first region is adjacent to the second region in the main scan direction. The printing region includes a first overlapping region in which the first region overlaps the second region.
    Type: Application
    Filed: February 22, 2024
    Publication date: August 29, 2024
    Inventor: Masaru KUMAGAI
  • Publication number: 20240269933
    Abstract: A three-dimensional object printing apparatus includes a head that ejects a liquid to a printing region on a workpiece, and a movement mechanism that changes a relative position and posture between the workpiece and the head, and executes a first printing operation and a second printing operation. The printing region includes a first band region into which the liquid is ejected in the first printing operation and a second band region into which the liquid is ejected in the second printing operation. When a width of the first band region at a first position is set as a first width and a width of the first band region at a second position is set as a second width, the first width is less than the second width, and a part of the printing region overlaps with a part of the second band region at the first position.
    Type: Application
    Filed: February 13, 2024
    Publication date: August 15, 2024
    Inventors: Masaru KUMAGAI, Kohei UTSUNOMIYA, Yuki ISHII
  • Publication number: 20240269992
    Abstract: A three-dimensional object printing apparatus executes a first printing operation in which a liquid is ejected into a first band region and a second printing operation in which the liquid is ejected into a second band region. When an angle formed by a vector at a first position in a first path and a vector at a second position in a second path is set as a first angle and an angle formed by a vector at a third position in the first path and a vector at a fourth position in the second path is set as a second angle, the first angle is more than the second angle, and a width in which the first band region overlaps with the second band region at the first position is less than a width in which the first band region overlaps with the second band region at the third position.
    Type: Application
    Filed: February 13, 2024
    Publication date: August 15, 2024
    Inventors: Yoshinori NAKAJIMA, Kohei UTSUNOMIYA, Masaru KUMAGAI, Yuki ISHII
  • Publication number: 20240246336
    Abstract: A printing apparatus includes: a head including a nozzle surface; and a robot changes a relative position of the head with respect to a workpiece, in which a first printing operation of performing printing on the workpiece is executed by causing the head to eject the liquid, and when a timing at which the first printing operation is started is set as a first timing, a timing at which the first printing operation ends is set as a second timing, a timing between the first timing and the second timing is set as a third timing, and a distance between the plurality of nozzles and the workpiece along a normal direction of the nozzle surface is set as an ejection distance, the ejection distance at one or both of the first timing and the second timing is more than the ejection distance at the third timing.
    Type: Application
    Filed: January 16, 2024
    Publication date: July 25, 2024
    Inventors: Masamichi SUZUKI, Kohei UTSUNOMIYA, Yoshinori NAKAJIMA, Masaru KUMAGAI, Yuki ISHII
  • Patent number: 12002616
    Abstract: A coil device includes a bobbin, a terminal, and a terminal block. The bobbin includes a winding portion for winding a wire around an outer circumference of the winding portion. The terminal is connectable with an end of the wire. The terminal block holds the terminal. The terminal is movable both in a first axis and a second axis of the bobbin.
    Type: Grant
    Filed: November 5, 2020
    Date of Patent: June 4, 2024
    Assignee: TDK CORPORATION
    Inventors: Toshiyuki Horikawa, Masaaki Iwakura, Masaru Kumagai, Shoichi Sasaki
  • Patent number: 11981152
    Abstract: There is provided a three-dimensional object printing apparatus including a first robot supporting a head having a nozzle for discharging a liquid and changing a position and a posture of the head, a second robot supporting a three-dimensional workpiece and changing a position and a posture of the workpiece, a curing unit that emits energy to cure or solidify the liquid discharged from the head, and a maintenance unit that performs maintenance on the head. The first robot has a first base portion fixed to a base. The second robot has a second base portion fixed to the base. In a plan view of the base, a virtual line segment connecting the first base portion and the second base portion passes between the curing unit and the maintenance unit.
    Type: Grant
    Filed: February 21, 2022
    Date of Patent: May 14, 2024
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Masaru Kumagai, Shinichi Nakamura, Tomonaga Hasegawa, Yuichiro Matsuura, Yuki Ishii
  • Publication number: 20240120147
    Abstract: A flat coil comprises a coil main portion having a flat shape; a lead portion drawn out from the coil main portion; and a heat-dissipating portion provided to the coil main portion at a location different from where the lead portion is drawn out from the coil main portion, the heat-dissipating portion meeting the coil main portion at a predetermined angle.
    Type: Application
    Filed: October 4, 2023
    Publication date: April 11, 2024
    Applicant: TDK CORPORATION
    Inventors: Masaru KUMAGAI, Shinichiro KOKUBO, Ge LI
  • Patent number: 11945163
    Abstract: A three-dimensional object printing apparatus includes a liquid discharge head having a nozzle surface, a moving mechanism that changes a position and a pose of the liquid discharge head relative to a three-dimensional workpiece, and a controller. The workpiece has a first surface and a second surface that forms a corner bent or curved in a convex shape between the first surface and the second surface. When an axis along a scanning direction of the liquid discharge head with respect to the workpiece in a first printing operation of performing printing on the first surface is a first scanning axis and a normal vector of the nozzle surface in the first printing operation is a first discharge vector, the controller controls the driving of the moving mechanism such that the first discharge vector has a component in a direction toward the second surface along the first scanning axis.
    Type: Grant
    Filed: June 27, 2021
    Date of Patent: April 2, 2024
    Assignee: Seiko Epson Corporation
    Inventor: Masaru Kumagai
  • Publication number: 20240096547
    Abstract: The present disclosure provides a coil device that can be reduced in height, has a small installation area of a case, and is excellent in heat dissipation. A coil device according to the present disclosure includes: a device body including a bobbin and a coil unit of a wire wound around the bobbin; a terminal block arranging a lead portion drawn out from a wire of the coil unit thereon; and a case capable of accommodating the device body. The case includes a support arm extending outside the case, and the terminal block is held by the support arm.
    Type: Application
    Filed: September 12, 2023
    Publication date: March 21, 2024
    Applicant: TDK CORPORATION
    Inventors: Tomohiro FURUICHI, Masaru KUMAGAI, Takuma TANAKA
  • Patent number: 11932035
    Abstract: There is provided a three-dimensional object printing apparatus including an imaging device fixed to a base and imaging an object located inside an imaging range, a first robot supporting a head having a nozzle for discharging a liquid and changing a position and a posture of the head, and a second robot supporting a three-dimensional workpiece and changes a position and a posture of the workpiece. The three-dimensional object printing apparatus performs a material feeding step of causing the second robot to move the workpiece from an outside to an inside of the imaging range, and a printing step of causing the head to discharge the liquid to the workpiece while at least one of the first robot and the second robot relatively moves the head and the workpiece inside the imaging range.
    Type: Grant
    Filed: February 21, 2022
    Date of Patent: March 19, 2024
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Tomonaga Hasegawa, Yuichiro Matsuura, Masaru Kumagai, Shinichi Nakamura, Yuki Ishii
  • Publication number: 20240006117
    Abstract: A coil device includes a coil, a terminal, a bobbin, and a core. The coil includes a winding portion and a lead portion drawn out from the winding portion. The terminal is connected with the lead portion. The bobbin includes a cylinder portion for the winding portion and a terminal installation portion formed at an end in a first direction parallel to an axial direction of the cylinder portion and provided with the terminal. The core is attachable to the bobbin. The terminal installation portion includes a convex portion separating the core and the terminal.
    Type: Application
    Filed: June 14, 2023
    Publication date: January 4, 2024
    Applicant: TDK CORPORATION
    Inventors: Atsushi SHOJI, Masaru KUMAGAI
  • Patent number: 11826947
    Abstract: A three-dimensional object print apparatus performs a first step at which a liquid ejecting head ejects liquid onto a workpiece and simultaneously a moving mechanism changes a location of the liquid ejecting head relative to the workpiece along a first route and further performs a second step at which an energy emitting section irradiates the liquid on the workpiece with energy and simultaneously the moving mechanism changes the location of the liquid ejecting head relative to the workpiece along a second route. In this case, L1<L2 at the first step and L1>L2 at the second step, where L1 denotes a distance in a direction normal to a nozzle surface of the liquid ejecting head between the workpiece and the nozzle surface, and L2 denotes a distance in a direction normal to an emission surface of the energy emitting section between the workpiece and the emission surface.
    Type: Grant
    Filed: October 18, 2021
    Date of Patent: November 28, 2023
    Assignee: Seiko Epson Corporation
    Inventors: Masaru Kumagai, Yuki Ishii
  • Publication number: 20230294410
    Abstract: A printing apparatus includes: a wiping member extending along a first axis; a head including a nozzle surface; and a movement mechanism configured to change a relative positional relationship between the wiping member and the head, and the printing apparatus executes a first wiping operation that changes a position of the head relative to the wiping member along a second axis intersecting the first axis, with the nozzle surface and a first wiping area of the wiping member in contact with each other, and a second wiping operation that changes the position of the head relative to the wiping member along the second axis, with the nozzle surface and a second wiping area of the wiping member in contact with each other, the second wiping area being located at a position different from a position of the first wiping area in a direction along the first axis.
    Type: Application
    Filed: March 14, 2023
    Publication date: September 21, 2023
    Inventors: Masaru KUMAGAI, Shinichi NAKAMURA, Eiichiro WATANABE
  • Publication number: 20230286291
    Abstract: A three-dimensional object printing device includes a head that ejects a liquid onto a three-dimensional workpiece and a robot that changes the position of the head relative to the three-dimensional workpiece. The robot has N number of joints that are pivotable about a plurality of pivot axes that differ from each other where N is a natural number of two or more. The three-dimensional object printing device executes a first print operation in which the head ejects the liquid to a first region on the workpiece while the robot changes the position of the head relative to the workpiece, the number of joints that pivot during the first print operation among the N number of joints is M (1?M?N), and at least one joint of the M number of joints does not pivot backward during the first print operation.
    Type: Application
    Filed: March 8, 2023
    Publication date: September 14, 2023
    Inventor: Masaru KUMAGAI
  • Publication number: 20230290560
    Abstract: A coil device 1 comprises a second bobbin 20 provided with a second coil 92; cores 30b and 30c attached to the second bobbin 20; a case 40 accommodating the second bobbin 20 and the cores 30b and 30c; and a heat dissipating resin 100 filling the case 40. The case 40 comprises a case body 41 covering the second bobbin 20 with the cores 30b and 30c from above and from below and having an opening 42 that is opened laterally. The second bobbin 20 comprises protrusions 24 protruding from the case body 41 through the opening 42.
    Type: Application
    Filed: March 6, 2023
    Publication date: September 14, 2023
    Applicant: TDK Corporation
    Inventors: Masaru KUMAGAI, Tomohiro Furuichi, Satoshi Denda