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).

  • Patent number: 10717295
    Abstract: A liquid ejecting apparatus includes: a liquid ejecting head including a liquid chamber which communicates with a nozzle; a supply flow path having a first end connected to a liquid supply source and a second end connected to the liquid chamber; a first circulation flow path having a first end connected to the liquid chamber and a second end connected to a first connecting section in the supply flow path; a supply pump provided in the supply flow path; a first pressure regulating valve provided between the first connecting section and the liquid ejecting head in the supply flow path; a second pressure regulating valve provided in the first circulation flow path; a circulation pump provided in the first circulation flow path and configured to circulate the liquid in a downstream direction; and an opening mechanism configured to forcibly open the first pressure regulating valve.
    Type: Grant
    Filed: May 7, 2019
    Date of Patent: July 21, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Masaru Kumagai, Yukihiro Hanaoka
  • Patent number: 10661574
    Abstract: A liquid ejecting apparatus includes a liquid ejecting head that ejects liquid through a nozzle, a supply flow path that supplies liquid from a liquid container containing liquid to the liquid ejecting head, a liquid chamber provided in a buffer chamber disposed in the supply flow path, the liquid chamber being configured to change in volume, a liquid feeding unit of a reversible type disposed in the supply flow path between the liquid container and the liquid chamber, a control portion that controls driving of the liquid feeding unit, and a suction unit that suctions liquid through the nozzle. The control portion controls the liquid feeding unit to perform reverse feeding of the liquid from the liquid chamber to the liquid container before the suction unit suctions the liquid through the nozzle.
    Type: Grant
    Filed: March 13, 2019
    Date of Patent: May 26, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Eiichiro Watanabe, Masaru Kumagai, Yukihiro Hanaoka, Izumi Nozawa
  • Patent number: 10569559
    Abstract: A liquid ejecting apparatus includes a liquid ejecting head having nozzles and an opening surface through which the nozzles are opened, the liquid ejecting head being configured to eject liquid from the nozzles, a supply flow path configured to supply the liquid to the liquid ejecting head, a pressurizing mechanism that can pressurize the inside of the supply flow path, an opening/closing mechanism that can open and close the supply flow path, and a control unit that controls operations of the liquid ejecting head, the pressurizing mechanism, and the opening/closing mechanism.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: February 25, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Yukihiro Hanaoka, Takuya Okina, Eiichiro Watanabe, Masaru Kumagai
  • Publication number: 20200059705
    Abstract: A system for distributing a partial video portion in a series of imaged video to a user facilitates range correction of the video portion to reduce a burden on a person involved in video imaging. An information processing apparatus according to the present technology includes an information acquisition unit configured to acquire information of an in-point and an out-point specifying a partial range in an imaged video by an imaging device as a video portion to be distributed to a user, and a transmission control unit configured to perform control to transmit the information of an in-point and an out-point acquired by the information acquisition unit and the imaged video to an external device.
    Type: Application
    Filed: December 6, 2017
    Publication date: February 20, 2020
    Inventors: KOJI TSUKAYA, YOSHIHIRO ASAKO, MASARU MIZUOCHI, SOUICHIRO OISHI, TAKAO KUMAGAI
  • Publication number: 20200048598
    Abstract: The cell handling device includes a container having a section to store cells; a cell detection unit for detecting a cell stored in the section; a head device for conducting picking of cells, and transfer and release of the picked cells; a control unit; and a determination unit for making a determination of a cell state including at least one of the number, properties, and arrangement of the cells based on a detection result of the cell detection unit. The control unit causes the head device to execute, according to a state determination result obtained by the determination unit, one operation selected from among operation of picking all the cells stored in the section, operation of picking a part of the cells stored in the section, operation of picking a new cell and releasing the cell in the section, and operation of terminating processing of the section.
    Type: Application
    Filed: February 26, 2018
    Publication date: February 13, 2020
    Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventors: Masaru SAKAMOTO, Saburo ITO, Takahiko KUMAGAI
  • Publication number: 20190344580
    Abstract: A liquid ejecting apparatus includes: a liquid ejecting head including a liquid chamber which communicates with a nozzle; a supply flow path having a first end connected to a liquid supply source and a second end connected to the liquid chamber; a first circulation flow path having a first end connected to the liquid chamber and a second end connected to a first connecting section in the supply flow path; a supply pump provided in the supply flow path; a first pressure regulating valve provided between the first connecting section and the liquid ejecting head in the supply flow path; a second pressure regulating valve provided in the first circulation flow path; a circulation pump provided in the first circulation flow path and configured to circulate the liquid in a downstream direction; and an opening mechanism configured to forcibly open the first pressure regulating valve.
    Type: Application
    Filed: May 7, 2019
    Publication date: November 14, 2019
    Inventors: Masaru KUMAGAI, Yukihiro HANAOKA
  • Patent number: 10472585
    Abstract: A water-based lubricant for plastic working of a metallic material is obtained by adding to a water-based medium: (A) a polymer and/or a salt thereof containing a carboxylic acid or a derivative thereof as a constituent monomer; (B) an oxoacid of tungsten, of silicon, or of phosphorus, or a condensate thereof, and/or a salt thereof; (C) a hydroxide of an alkali metal; and (D) a lubricating component (D), and the solid content weight ratio (A)/[(A)+(B)+(C)+(D)] is 0.05 to 0.4.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: November 12, 2019
    Assignee: NIHON PARKERIZING CO., LTD.
    Inventors: Masaru Mochizuki, Manabu Kumagai, Yuta Kobayashi
  • Publication number: 20190283441
    Abstract: A liquid ejecting apparatus includes a liquid ejecting head that ejects liquid through a nozzle, a supply flow path that supplies liquid from a liquid container containing liquid to the liquid ejecting head, a liquid chamber provided in a buffer chamber disposed in the supply flow path, the liquid chamber being configured to change in volume, a liquid feeding unit of a reversible type disposed in the supply flow path between the liquid container and the liquid chamber, a control portion that controls driving of the liquid feeding unit, and a suction unit that suctions liquid through the nozzle. The control portion controls the liquid feeding unit to perform reverse feeding of the liquid from the liquid chamber to the liquid container before the suction unit suctions the liquid through the nozzle.
    Type: Application
    Filed: March 13, 2019
    Publication date: September 19, 2019
    Inventors: Eiichiro WATANABE, Masaru KUMAGAI, Yukihiro HANAOKA, Izumi NOZAWA
  • Patent number: 10361025
    Abstract: A transformer 10 comprises a bobbin 20. A cylinder portion 28 of the bobbin 20 is provided with a first winding part 35 where a first wire 37 is wound and a second winding part 36 where a second wire 38 is wound at a position different from the first winding part 35 in an axial direction. At an outer circumference of the cylinder portion 28 located between the first winding part 35 and the second winding part 36, an insulating partition collar 30 is formed. On the first winding part 35, a winding partition collar 33, separating in respective sections S1, S2, is formed. On the winding partition collar 33, at least one communication groove 33a, communicating the sections S1, S2 adjacent to each other is formed. The first wire 37 is ?-wound around the first winding part 35.
    Type: Grant
    Filed: July 19, 2016
    Date of Patent: July 23, 2019
    Assignee: TDK CORPORATION
    Inventors: Masaaki Iwakura, Katsumi Kobayashi, Masaru Kumagai, Nobuo Kitajima, Satoshi Shinbo
  • Patent number: 10214024
    Abstract: A liquid ejecting apparatus includes: a liquid ejecting head having a nozzle that ejects liquid; a supply flow path that supplies the liquid to the liquid ejecting head; a pressurizing mechanism that pressurizes a region which communicates with the supply flow path; a decompression mechanism that decompresses the region pressurized by the pressurizing mechanism; and a resistor section that interferes with decompression by the decompression mechanism.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: February 26, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Hiromichi Takanashi, Masaru Kumagai
  • Publication number: 20180162139
    Abstract: A liquid ejecting apparatus includes a liquid ejecting head having nozzles and an opening surface through which the nozzles are opened, the liquid ejecting head being configured to eject liquid from the nozzles, a supply flow path configured to supply the liquid to the liquid ejecting head, a pressurizing mechanism that can pressurize the inside of the supply flow path, an opening/closing mechanism that can open and close the supply flow path, and a control unit that controls operations of the liquid ejecting head, the pressurizing mechanism, and the opening/closing mechanism.
    Type: Application
    Filed: November 17, 2017
    Publication date: June 14, 2018
    Inventors: Yukihiro Hanaoka, Takuya Okina, Eiichiro Watanabe, Masaru Kumagai
  • Patent number: 9956784
    Abstract: A liquid ejecting apparatus includes an ejecting head through which liquid is ejected. A supply passage connects the ejecting head to a plurality of liquid storage bodies that include a first liquid storage body to be used first and a second liquid storage body to be used following the use of the first liquid storage body. A supply mechanism discharges the liquid contained in the liquid storage bodies to the supply passage. When the supply mechanism discharges the liquid contained in the first liquid storage body to the supply passage on the basis of first energy, if the amount of liquid left in the first liquid storage body is smaller than a threshold amount, the supply mechanism discharges the liquid contained in the second liquid storage body to the supply passage on the basis of second energy, which is lower than the first energy.
    Type: Grant
    Filed: June 9, 2016
    Date of Patent: May 1, 2018
    Assignee: Seiko Epson Corporation
    Inventors: Masaru Kumagai, Hirokazu Ono
  • Patent number: 9921533
    Abstract: An image forming apparatus includes a photoconductor, an optical scanner, a development device, a movable density sensor, a density sensor driver, and a processor. The optical scanner includes a light source to emit light, and irradiates a surface of the photoconductor in a main scanning direction with the light to form a latent image on the surface of the photoconductor. The development device develops the latent image into a toner image. The density sensor detects unevenness in density of the toner image in the main scanning direction. The density sensor driver moves the density sensor in the main scanning direction. The processor corrects a driving signal for the light source according to image data to reduce the unevenness in density in the main scanning direction, according to positional data of the density sensor in the main scanning direction and an output value of the density sensor.
    Type: Grant
    Filed: August 15, 2016
    Date of Patent: March 20, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Atsushi Mori, Shinji Kato, Masaru Kumagai
  • Publication number: 20170253038
    Abstract: A liquid ejecting apparatus includes: a liquid ejecting head having a nozzle that ejects liquid; a supply flow path that supplies the liquid to the liquid ejecting head; a pressurizing mechanism that pressurizes a region which communicates with the supply flow path; a decompression mechanism that decompresses the region pressurized by the pressurizing mechanism; and a resistor section that interferes with decompression by the decompression mechanism.
    Type: Application
    Filed: March 1, 2017
    Publication date: September 7, 2017
    Inventors: Hiromichi TAKANASHI, Masaru KUMAGAI
  • Patent number: 9616671
    Abstract: An object is to provide a cartridge that is configured to be readily mountable and stir a liquid contained in the cartridge. A cartridge includes an ink pack, a first air bag and a casing provided to place the ink pack and the first air bag therein. The casing has an ink supply port, an air flow port for first air bag and an air flow port for casing that are provided on a front face of the casing in a mounting direction so that this configuration enables the cartridge to be readily mounted to the inkjet printer. The pressurized air is introduced through the air flow port for first air bag into the first air bag. This expands the first air bag to press the ink pack and thereby stir ink I contained in the ink pack.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: April 11, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Yoshihiro Koizumi, Masaru Kumagai, Hitoshi Matsumoto
  • Patent number: 9555637
    Abstract: A cartridge 1 is provided with an ink pack 9, an air bag 10 capable of abutting the ink pack 9, and a pressurizing chamber 11 that stores the ink pack 9 and the air bag 10. In the case where the amount of ink in the ink pack 9 decreases, pressurized air is introduced into the air bag 10, the ink pack 9 is pressed against the air bag 10, and thereby the internal pressure of the ink pack 9 is increased. After that, pressurized air is introduced into the pressurizing chamber 11 so as to increase the internal pressure of the pressurizing chamber 11 and pressurize the ink pack 9 from outside. Accordingly, the ink in the ink pack 9 is supplied from an ink supply port 12 to the inkjet printer 2.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: January 31, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Masaru Kumagai, Yoshihiro Koizumi, Masaru Kobashi
  • Publication number: 20170008293
    Abstract: A liquid ejecting apparatus includes an ejecting head through which liquid is ejected. A supply passage connects the ejecting head to a plurality of liquid storage bodies that include a first liquid storage body to be used first and a second liquid storage body to be used following the use of the first liquid storage body. A supply mechanism discharges the liquid contained in the liquid storage bodies to the supply passage. When the supply mechanism discharges the liquid contained in the first liquid storage body to the supply passage on the basis of first energy, if the amount of liquid left in the first liquid storage body is smaller than a threshold amount, the supply mechanism discharges the liquid contained in the second liquid storage body to the supply passage on the basis of second energy, which is lower than the first energy.
    Type: Application
    Filed: June 9, 2016
    Publication date: January 12, 2017
    Inventors: Masaru KUMAGAI, Hirokazu ONO
  • Publication number: 20160349687
    Abstract: An image forming apparatus includes a photoconductor, an optical scanner, a development device, a movable density sensor, a density sensor driver, and a processor. The optical scanner includes a light source to emit light, and irradiates a surface of the photoconductor in a main scanning direction with the light to form a latent image on the surface of the photoconductor. The development device develops the latent image into a toner image. The density sensor detects unevenness in density of the toner image in the main scanning direction. The density sensor driver moves the density sensor in the main scanning direction. The processor corrects a driving signal for the light source according to image data to reduce the unevenness in density in the main scanning direction, according to positional data of the density sensor in the main scanning direction and an output value of the density sensor.
    Type: Application
    Filed: August 15, 2016
    Publication date: December 1, 2016
    Inventors: Atsushi MORI, Shinji KATO, Masaru KUMAGAI
  • Publication number: 20160329148
    Abstract: A transformer 10 comprises a bobbin 20. A cylinder portion 28 of the bobbin 20 is provided with a first winding part 35 where a first wire 37 is wound and a second winding part 36 where a second wire 38 is wound at a position different from the first winding part 35 in an axial direction. At an outer circumference of the cylinder portion 28 located between the first winding part 35 and the second winding part 36, an insulating partition collar 30 is formed. On the first winding part 35, a winding partition collar 33, separating in respective sections S1, S2, is formed. On the winding partition collar 33, at least one communication groove 33a, communicating the sections S1, S2 adjacent to each other is formed. The first wire 37 is a-wound around the first winding part 35.
    Type: Application
    Filed: July 19, 2016
    Publication date: November 10, 2016
    Inventors: Masaaki IWAKURA, Katsumi Kobayashi, MASARU KUMAGAI, NOBUO KITAJIMA, SATOSHI SHINBO
  • Publication number: 20160288511
    Abstract: An object is to provide a cartridge that is configured to be readily mountable and stir a liquid contained in the cartridge. A cartridge includes an ink pack, a first air bag and a casing provided to place the ink pack and the first air bag therein. The casing has an ink supply port, an air flow port for first air bag and an air flow port for casing that are provided on a front face of the casing in a mounting direction so that this configuration enables the cartridge to be readily mounted to the inkjet printer. The pressurized air is introduced through the air flow port for first air bag into the first air bag. This expands the first air bag to press the ink pack and thereby stir ink I contained in the ink pack.
    Type: Application
    Filed: March 24, 2016
    Publication date: October 6, 2016
    Inventors: Yoshihiro KOIZUMI, Masaru KUMAGAI, Hitoshi MATSUMOTO