Patents by Inventor Shimpei YOSHIKAWA

Shimpei YOSHIKAWA 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: 20220016896
    Abstract: A liquid supply member includes a first member, a second member, and a damper member disposed between the first member and the second member, wherein the first member is a member configured to form a liquid chamber, wherein the damper member is a flexible member configured to form the liquid chamber together with the first member, wherein the second member is a member configured to form an atmosphere communication chamber communicating with an ambient atmosphere at a position between the damper member and the second member and opposing the liquid chamber with the damper member in between, and wherein a protrusion portion is formed on a surface of the second member facing the atmosphere communication chamber at a position corresponding to a central part of the damper member, the protrusion portion protruding toward the damper member beyond a connection surface between the damper member and the second member.
    Type: Application
    Filed: July 12, 2021
    Publication date: January 20, 2022
    Inventors: Ryo Sato, Hiroki Tajima, Kyosuke Toda, Shimpei Yoshikawa
  • Publication number: 20220009237
    Abstract: Provided is a liquid ejecting head and a liquid ejecting apparatus that can suppress decrease in ejection accuracy while suppressing increase in cost and decrease in productivity. To this end, a sub-tank is attached to a bottom of a main body part with a greater number of screws on the front side where the stiffness is low than that on the back side where the stiffness is high.
    Type: Application
    Filed: June 16, 2021
    Publication date: January 13, 2022
    Inventors: Shimpei Yoshikawa, Hiroki Tajima, Takeho Miyashita
  • Patent number: 11192370
    Abstract: A liquid ejection head includes a recording element substrate including a plurality of ejection port arrays, a support member supporting the recording element substrate, and including a plurality of liquid chambers, and a channel member including a plurality of channels. Each of the plurality of liquid chambers includes an opening connected to one of the plurality of channels. Each of the plurality of channels is a channel that extends upward from the opening in a vertical direction, in a posture of the liquid ejection head in ejecting the liquid. A volume of the channel connected to the opening located at a central portion of the liquid chamber in the longitudinal direction, among the plurality of channels, is greater than a volume of the channel connected to the opening located on an end portion side apart from the central portion of the liquid chamber in the longitudinal direction.
    Type: Grant
    Filed: June 16, 2020
    Date of Patent: December 7, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Naoko Shimizu, Yosuke Takagi, Shimpei Yoshikawa, Hiroki Tajima, Kyosuke Toda
  • Patent number: 11192381
    Abstract: A liquid ejection apparatus includes: a recording head that ejects liquid; a sub-tank that is connected to the recording head and temporarily stores the liquid to be supplied to the recording head; a liquid tank that communicates with the sub-tank and is able to be filled with the liquid; a first atmosphere opening unit that is provided in the liquid tank; and a second atmosphere opening unit that is provided in the sub-tank. The second atmosphere opening unit is closable when the liquid tank is filled with the liquid, and the first atmosphere opening unit and the second atmosphere opening unit are able to open the liquid tank and the sub-tank to the atmosphere, respectively, when the sub-tank is filled with the liquid filled in the liquid tank by a hydraulic head pressure.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: December 7, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroki Tajima, Keiichiro Tsukuda, Kenji Yabe, Yuji Tamaru, Naoko Shimizu, Kyosuke Toda, Sayaka Seki, Yosuke Takagi, Shimpei Yoshikawa, Ryo Sato
  • Patent number: 11077658
    Abstract: A liquid injection head improving electric reliability includes: a substrate including: energy generating elements configured to apply energy for ejection to a liquid, and a substrate upper surface on which terminals respectively connected to electric wirings are provided, an ejection port forming member having: an ejection port forming surface in which the ejection ports for ejecting a liquid are formed, and a back surface on a side opposite to the ejection port forming surface, which is arranged so as to opposite to the substrate upper surface, and a sealant configured to cover connecting portions between the electric wirings and the terminals.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: August 3, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomoki Ishiwata, Shuzo Iwanaga, Masaki Oikawa, Keiji Tomizawa, Tomohiro Sato, Akiko Hammura, Chiaki Muraoka, Shimpei Yoshikawa
  • Publication number: 20210197562
    Abstract: A liquid discharge head includes an element substrate including an energy generation element configured to generate energy for discharging liquid from a discharge port, and a supporting member which supports the element substrate and in which a liquid chamber configured to supply liquid to the discharge port is formed, wherein a recessed portion communicating with the liquid chamber is formed at a position above the liquid chamber in a vertical direction in an orientation of the liquid discharge head when used, and wherein at least one of surfaces forming the recessed portion is formed of a flexible member configured to absorb vibration of liquid in the liquid chamber.
    Type: Application
    Filed: December 11, 2020
    Publication date: July 1, 2021
    Inventors: Kyosuke Toda, Sayaka Seki, Shimpei Yoshikawa, Kazuhiko Okito, Kenji Yabe, Yasuaki Kitayama, Ryo Sato
  • Publication number: 20210197566
    Abstract: A liquid ejection head includes an element substrate having an energy-generating element configured to generate an energy for ejecting a liquid from an ejection orifice, a support member for supporting the element substrate, the support member including a liquid chamber formed therein to supply the liquid to the ejection orifice, and a damper portion for absorbing vibration of the liquid inside the liquid chamber, the damper portion being flexible. The support member has a through-hole for communicating with the liquid chamber at a position located above the liquid chamber in a vertical direction when the liquid ejection head is in a use orientation. The damper portion has a taper portion that tapers downwardly in the vertical direction and is positioned in such a manner that the tapering portion closes the through-hole, and the damper portion and the support member are attached to each other by a fixing member.
    Type: Application
    Filed: December 9, 2020
    Publication date: July 1, 2021
    Inventors: Sayaka Seki, Kyosuke Toda, Shimpei Yoshikawa, Ryo Sato, Keiichiro Tsukuda, Kazuhiko Okito, Kenji Yabe, Yasuaki Kitayama
  • Publication number: 20210170748
    Abstract: A liquid ejection head includes a flow path-forming part having a flow path for liquid supplied from a liquid reservoir and a plurality of outlet ports for discharging the liquid, a liquid ejecting unit having a plurality of inlet ports into which the liquid flows and a plurality of ejection element rows corresponding to the inlet ports and each having a plurality of ejection elements to eject the liquid, and a sealing member having a sealing opening which communicates the plurality of outlet ports and the plurality of inlet ports, the sealing member sealing a portion between the flow path-forming part and the liquid ejecting unit so that the plurality of outlet ports and the plurality of inlet ports are in communication. A plurality of the sealing openings are provided for the sealing member, and at least one of the sealing openings has at least two inlet ports.
    Type: Application
    Filed: December 4, 2020
    Publication date: June 10, 2021
    Inventors: Yosuke Takagi, Hiroki Tajima, Kyosuke Toda, Naoko Shimizu, Shimpei Yoshikawa
  • Publication number: 20210162766
    Abstract: A liquid filling method of filling a liquid storage device including a first tank that stores a liquid to be supplied to an ejection head ejecting the liquid and a second tank that stores the liquid to be supplied to the first tank through a connection port provided in the first tank with the liquid, the method including: injecting the liquid from a liquid storage container into the first tank through a first liquid introduction port provided in the first tank, in a state where a second liquid introduction port provided in the second tank is closed.
    Type: Application
    Filed: November 24, 2020
    Publication date: June 3, 2021
    Inventors: Atsushi OMURA, Hiroki TAJIMA, Keiichiro TSUKUDA, Kenji YABE, Yuji TAMARU, Naoko SHIMIZU, Sayaka SEKI, Yosuke TAKAGI, Shimpei YOSHIKAWA, Ryo SATO, Kyosuke TODA
  • Publication number: 20200398566
    Abstract: A liquid ejection head includes a recording element substrate including a plurality of ejection port arrays, a support member supporting the recording element substrate, and including a plurality of liquid chambers, and a channel member including a plurality of channels. Each of the plurality of liquid chambers includes an opening connected to one of the plurality of channels. Each of the plurality of channels is a channel that extends upward from the opening in a vertical direction, in a posture of the liquid ejection head in ejecting the liquid. A volume of the channel connected to the opening located at a central portion of the liquid chamber in the longitudinal direction, among the plurality of channels, is greater than a volume of the channel connected to the opening located on an end portion side apart from the central portion of the liquid chamber in the longitudinal direction.
    Type: Application
    Filed: June 16, 2020
    Publication date: December 24, 2020
    Inventors: Naoko Shimizu, Yosuke Takagi, Shimpei Yoshikawa, Hiroki Tajima, Kyosuke Toda
  • Publication number: 20200290362
    Abstract: A liquid ejection apparatus includes: a recording head that ejects liquid; a sub-tank that is connected to the recording head and temporarily stores the liquid to be supplied to the recording head; a liquid tank that communicates with the sub-tank and is able to be filled with the liquid; a first atmosphere opening unit that is provided in the liquid tank; and a second atmosphere opening unit that is provided in the sub-tank. The second atmosphere opening unit is closable when the liquid tank is filled with the liquid, and the first atmosphere opening unit and the second atmosphere opening unit are able to open the liquid tank and the sub-tank to the atmosphere, respectively, when the sub-tank is filled with the liquid filled in the liquid tank by a hydraulic head pressure.
    Type: Application
    Filed: February 28, 2020
    Publication date: September 17, 2020
    Inventors: Hiroki Tajima, Keiichiro Tsukuda, Kenji Yabe, Yuji Tamaru, Naoko Shimizu, Kyosuke Toda, Sayaka Seki, Yosuke Takagi, Shimpei Yoshikawa, Ryo Sato
  • Publication number: 20200070513
    Abstract: A liquid injection head improving electric reliability includes: a substrate including: energy generating elements configured to apply energy for ejection to a liquid, and a substrate upper surface on which terminals respectively connected to electric wirings are provided, an ejection port forming member having: an ejection port forming surface in which the ejection ports for ejecting a liquid are formed, and a back surface on a side opposite to the ejection port forming surface, which is arranged so as to opposite to the substrate upper surface, and a sealant configured to cover connecting portions between the electric wirings and the terminals.
    Type: Application
    Filed: August 29, 2019
    Publication date: March 5, 2020
    Inventors: Tomoki Ishiwata, Shuzo Iwanaga, Masaki Oikawa, Keiji Tomizawa, Tomohiro Sato, Akiko Hammura, Chiaki Muraoka, Shimpei Yoshikawa
  • Patent number: 10569565
    Abstract: A liquid ejection head including a supplying path supplying a liquid ejected from an ejection port includes a vent path branching from the supplying path to extend along a horizontal direction, the vent path enabling collection of bubbles mixed into the liquid. An inner surface of the vent path extending along the horizontal direction includes an area formed thereon and having a greater contact angle to the liquid than that of an inner surface of the supplying path.
    Type: Grant
    Filed: December 5, 2018
    Date of Patent: February 25, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shimpei Yoshikawa, Ryo Sato
  • Publication number: 20190176477
    Abstract: A liquid ejection head including a supplying path supplying a liquid ejected from an ejection port includes a vent path branching from the supplying path to extend along a horizontal direction, the vent path enabling collection of bubbles mixed into the liquid. An inner surface of the vent path extending along the horizontal direction includes a first area formed thereon and having a larger contact angle to the liquid than an inner surface of the supplying path.
    Type: Application
    Filed: December 5, 2018
    Publication date: June 13, 2019
    Inventors: Shimpei Yoshikawa, Ryo Sato
  • Patent number: 10150295
    Abstract: A liquid ejection head includes an energy generating element configured to generate energy used for ejection of a liquid, a print element board including an electroconductive anti-cavitation film provided to cover the energy generating element, and a connection board electrically connected to the anti-cavitation film and including a connection pad electrically connectable from outside.
    Type: Grant
    Filed: January 3, 2017
    Date of Patent: December 11, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tokuji Kudo, Chiaki Muraoka, Shimpei Yoshikawa, Yuichiro Akama, Yuji Tamaru, Yosuke Takagi, Takaaki Yamaguchi
  • Patent number: 9981476
    Abstract: A liquid discharge head includes a recording element substrate including a recording element, an electronic substrate disposed outside the recording element substrate, an electric element mounted on the electronic substrate, a housing that supports the recording element substrate and the electronic substrate and is made of a first resin material, and a cover member that surrounds and shields the electric element and is made of a second resin material, wherein the second resin material has higher heat resistance than the first resin material.
    Type: Grant
    Filed: October 25, 2016
    Date of Patent: May 29, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Chiaki Muraoka, Yukuo Yamaguchi, Mikiya Umeyama, Hiromasa Amma, Takuya Iwano, Tokuji Kudo, Shimpei Yoshikawa
  • Patent number: 9902163
    Abstract: A liquid ejecting head and a liquid ejecting apparatus that can suppress the influence of noise on a control signal includes a plurality of terminals for being electrically connected with a contact point provided in a liquid ejecting apparatus, and a liquid ejecting element substrate having a liquid ejecting element formed for ejecting liquid in response to a control signal transmitted from the liquid ejecting apparatus. The plurality of terminals includes signal terminals and ground terminals for control, for controlling the liquid ejecting element, and the signal terminals and the ground terminals for control are arranged at positions closer to the liquid ejecting element substrate than other terminals.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: February 27, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shimpei Yoshikawa, Chiaki Muraoka, Tokuji Kudo, Hiromasa Amma, Takuya Iwano, Kimiyuki Hayasaki
  • Patent number: 9884485
    Abstract: A liquid ejecting head and a liquid ejecting apparatus are designed so as to suppress the influence of noise on control signals. The liquid ejecting head has a plurality of terminals electrically connected with a contact point provided in the liquid ejecting apparatus, and a liquid ejecting element substrate having a liquid ejecting element formed for ejecting liquid in response to the control signals transmitted from the liquid ejecting apparatus. A power source terminal for drive and a ground terminal for drive, which are provided for driving the liquid ejecting element, are arranged adjacent to each other, and a power source wiring that connects the power source terminal for drive with the liquid ejecting element substrate and a ground wiring that connects the ground terminal for drive with the liquid ejecting element substrate are at least partially arranged in parallel.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: February 6, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shimpei Yoshikawa, Chiaki Muraoka, Tokuji Kudo, Hiromasa Amma, Takuya Iwano, Kimiyuki Hayasaki
  • Patent number: 9770911
    Abstract: In a liquid ejection head and a liquid ejection apparatus that can suppress deterioration of image quality, a plurality of second beam-shaped member is provided on the downstream side of a first beam-shaped member in a flow passage connected to an ejection element substrate. The first beam-shaped member divides the flow passage into two flow passages in a liquid-flowing direction and the second beam-shaped member sandwich a line extending from the first beam-shaped member in the liquid-flowing direction.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: September 26, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Genji Inada, Hiromasa Amma, Takuya Iwano, Chiaki Muraoka, Tokuji Kudo, Shimpei Yoshikawa, Monta Matsui
  • Patent number: 9718274
    Abstract: In a liquid ejection head and a liquid ejection apparatus capable of reducing the occurrence of ejection malfunction, in a connecting section where a first flow channel and a second flow channel connect, a projecting member is provided on the flow channel wall forming the second flow channel.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: August 1, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Genji Inada, Hiromasa Amma, Takuya Iwano, Chiaki Muraoka, Tokuji Kudo, Shimpei Yoshikawa