Patents by Inventor Chiaki Muraoka

Chiaki Muraoka 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: 20200316952
    Abstract: An inkjet printing apparatus includes a discharge head that discharges ink, and a housing that contains the discharge head, wherein the housing contains a first ink storage member and a second ink storage member that each store ink, and the ink is supplied from each of the first ink storage member and the second ink storage member to the discharge head, wherein the first ink storage member is an ink cartridge not having an ink refilling port for enabling ink refilling by opening a stopper member, and detachable from the inkjet printing apparatus, and wherein the second ink storage member has the ink refilling port.
    Type: Application
    Filed: March 30, 2020
    Publication date: October 8, 2020
    Inventors: Chiaki Muraoka, Yuji Tamaru, Kazumasa Matsushita
  • Publication number: 20200247130
    Abstract: An inkjet printer includes an inkjet head configured to discharge ink and an ink tank including a plurality of ink storage portions in which the ink is stored to supply the ink to the inkjet head via a connected tube, and replenishing ports via which the plurality of ink storage portions is replenished with ink, wherein the ink tank has an outer wall facing an outer side of the ink tank and having a thickness greater than a thickness of a partition wall arranged between the plurality of ink storage portions.
    Type: Application
    Filed: January 24, 2020
    Publication date: August 6, 2020
    Inventors: Masatomo Ojima, Hirofumi Okuhara, Tatsuo Nanjo, Chiaki Muraoka
  • Publication number: 20200207103
    Abstract: A liquid ejection apparatus includes: a liquid ejection unit; a liquid storage container including a replenishment port through which to replenish the liquid storage container with a liquid and an opening-closing member which closes and opens the replenishment port; and a notification unit configured to notify a user of information to be recognized by the user; and a control unit configured to control the notification unit. In a case where the time elapsed since the previous liquid ejection by the liquid ejection unit is a predetermined time or longer, the control unit causes the notification unit to notify the user of information on replenishment of the liquid storage container with a liquid.
    Type: Application
    Filed: December 19, 2019
    Publication date: July 2, 2020
    Inventors: Yuji Tamaru, Kazumasa Matsushita, Hirofumi Okuhara, Chiaki Muraoka
  • 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: 10471727
    Abstract: A configuration of a liquid ejecting head enables a stable, continuous ink supply with the off-carriage method, even if a force operates in the direction of joint needle insertion and removal. To this end, a joint opening that accepts insertion of a joint needle on a printing apparatus side is placed at a position closer to a joint face between an ejecting head and a sub tank unit than a positioning opening that engages with a positioning member on the printing apparatus side. Consequently, even if external force is produced due to coupling, the force exerted on the joint face that is a weak portion of an inkjet head may be minimized.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: November 12, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Chiaki Muraoka, Yukuo Yamaguchi, Hiromasa Amma, Takuya Iwano, Takeshi Sekino
  • 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: 9969163
    Abstract: A liquid discharge head includes a discharge unit that discharges a liquid as a result of electric energy being supplied to the discharge unit, a first wiring member that is joined to the discharge unit and that includes a plurality of first joining terminals each capable of transmitting the electric energy to the discharge unit, and a second wiring member that is electrically joined to the first wiring member and that includes a plurality of second joining terminals. At least three of the plurality of first joining terminals are inspection terminals that are short-circuited, and the second joining terminals are connected to contact terminals to each of which an external signal can be input.
    Type: Grant
    Filed: November 9, 2016
    Date of Patent: May 15, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Chiaki Muraoka, Keiji Tomizawa, Takuma Kodoi
  • Patent number: 9919518
    Abstract: A printing element substrate includes a plurality of printing elements, a first transistor forming an electrical pathway common to the plurality of printing elements, and a plurality of second transistors for driving the plurality of printing elements independently of each other. An electrical pathway is formed between a first power node and a second power node in the order of the first transistor, one of the plurality of printing elements, and one of the plurality of second transistors. The electrical pathway connecting each of the plurality of printing elements and the first transistor includes a plurality of electrical paths.
    Type: Grant
    Filed: December 30, 2016
    Date of Patent: March 20, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takaaki Yamaguchi, Yosuke Miura, Chiaki Muraoka, Yasushi Nakano
  • 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: 9832864
    Abstract: A liquid ejection head includes a circuit board having a wire pattern divided into a plurality of portions in order to provide the circuit board with very reliable bonding.
    Type: Grant
    Filed: May 23, 2016
    Date of Patent: November 28, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Junichiro Iri, Ryo Sato, Kazuhiro Idogawa, Chiaki Muraoka, Hiromasa Amma, Takuya Iwano
  • 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: 9731503
    Abstract: A liquid discharge head includes a substrate having an element that discharges liquid by generating thermal energy to generate an air bubble in the liquid, and a liquid supply port for supplying the liquid to the element, and a flow path forming assembly including a flow path forming member having a discharge port for discharging the liquid and, between the substrate and the flow path forming member, a pressure chamber including the element disposed adjacent thereto and a flow path causing the pressure chamber and the liquid supply port to communicate with each other. In addition, an interlayer is provided on a joining portion of the substrate and the flow path forming member and provided so as to protrude from between the substrate and the flow path forming member into the flow path, and a protection layer including metal is formed so as to cover the element.
    Type: Grant
    Filed: April 22, 2013
    Date of Patent: August 15, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takuma Kodoi, Keiji Tomizawa, Chiaki Muraoka
  • 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
  • Publication number: 20170190173
    Abstract: A printing element substrate includes a plurality of printing elements, a first transistor forming an electrical pathway common to the plurality of printing elements, and a plurality of second transistors for driving the plurality of printing elements independently of each other. An electrical pathway is formed between a first power node and a second power node in the order of the first transistor, one of the plurality of printing elements, and one of the plurality of second transistors. The electrical pathway connecting each of the plurality of printing elements and the first transistor includes a plurality of electrical paths.
    Type: Application
    Filed: December 30, 2016
    Publication date: July 6, 2017
    Inventors: Takaaki Yamaguchi, Yosuke Miura, Chiaki Muraoka, Yasushi Nakano
  • Publication number: 20170190176
    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: Application
    Filed: January 3, 2017
    Publication date: July 6, 2017
    Inventors: Tokuji Kudo, Chiaki Muraoka, Shimpei Yoshikawa, Yuichiro Akama, Yuji Tamaru, Yosuke Takagi, Takaaki Yamaguchi
  • Patent number: 9676181
    Abstract: A method for stabilizing a refilling speed within a predetermined range even with various physical properties of liquid to be ejected is provided for a liquid ejection head using a thermal system. To achieve this, a drive pulse is controlled for each nozzle array according to the combination of a predetermined material and structure of a bubble-generating chamber and the physical property of the liquid to be ejected such that an amount of an overshoot and the refilling speed are within a predetermined range.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: June 13, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keiji Tomizawa, Takuma Kodoi, Chiaki Muraoka
  • Publication number: 20170136769
    Abstract: A liquid discharge head includes a discharge unit that discharges a liquid as a result of electric energy being supplied to the discharge unit, a first wiring member that is joined to the discharge unit and that includes a plurality of first joining terminals each capable of transmitting the electric energy to the discharge unit, and a second wiring member that is electrically joined to the first wiring member and that includes a plurality of second joining terminals. At least three of the plurality of first joining terminals are inspection terminals that are short-circuited, and the second joining terminals are connected to contact terminals to each of which an external signal can be input.
    Type: Application
    Filed: November 9, 2016
    Publication date: May 18, 2017
    Inventors: Chiaki Muraoka, Keiji Tomizawa, Takuma Kodoi
  • Publication number: 20170120588
    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: Application
    Filed: October 25, 2016
    Publication date: May 4, 2017
    Inventors: Chiaki Muraoka, Yukuo Yamaguchi, Mikiya Umeyama, Hiromasa Amma, Takuya Iwano, Tokuji Kudo, Shimpei Yoshikawa