Patents by Inventor Zentaro Tamenaga

Zentaro Tamenaga 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: 9914308
    Abstract: A liquid ejection apparatus of the invention is a liquid ejection apparatus including a liquid storage container that stores liquid, a circulation mechanism that circulates liquid in a circulation path, and a liquid ejection head fluidly-connected to the liquid storage container, the liquid ejection head having a plurality of ejection openings, wherein the liquid ejection head includes at least a pair of common passages and a plurality of individual passages that connect one of the pair of common passages to the other one of the pair of common passages and communicate with the plurality of ejection openings, respectively, and at least a pair of pressure adjustment mechanisms whose pressures are set to different control pressures is connected to respective upstream sides or downstream sides of the pair of common passages.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: March 13, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kazuhiro Yamada, Takatsuna Aoki, Seiichiro Karita, Shuzo Iwanaga, Akio Saito, Shingo Okushima, Zentaro Tamenaga, Yumi Komamiya, Noriyasu Nagai, Tatsurou Mori, Akira Yamamoto
  • Publication number: 20170341381
    Abstract: A liquid discharge device to perform recording by use of a liquid discharge head including discharge ports to discharge a liquid, pressure generation elements to generate energy to be used to discharge the liquid, and pressure chambers communicating with the discharge ports. The liquid discharge device includes: a control unit to control a temperature of the liquid discharge head by applying heat with heating elements arranged in divided areas of a region of the liquid discharge head where the discharge ports are arranged. When there is recording data for the discharge port in a certain one of the divided areas, the control unit causes the heating element in the divided area to generate heat, and when there is no recording data for the discharge port in the certain divided area, the control unit keeps the heating element in the certain divided area from generating heat.
    Type: Application
    Filed: May 17, 2017
    Publication date: November 30, 2017
    Inventors: Takatsuna Aoki, Shuzo Iwanaga, Seiichiro Karita, Kazuhiro Yamada, Shingo Okushima, Zentaro Tamenaga, Akira Yamamoto, Tatsurou Mori, Noriyasu Nagai, Akio Saito, Ryo Kasai
  • Publication number: 20170341406
    Abstract: A liquid ejecting apparatus has a liquid ejecting unit and a negative pressure regulating unit provided between passages connecting the tank to the liquid ejecting unit, regulates fluid pressure of liquid flowing into the liquid ejecting unit. The negative pressure regulating unit includes a negative pressure chamber whose internal pressure is regulated within a predetermined range, and a discharging passage for discharging liquid stored in the negative pressure chamber from the negative pressure regulating unit. The discharging passage has an outlet disposed in an upper portion of the negative pressure chamber in a direction of gravity, a bubble accumulation portion connected to the outlet and having a space above the outlet in the direction of gravity, and a passage guiding liquid flowing from the outlet to a discharging port opened in a bottom of the negative pressure regulating unit.
    Type: Application
    Filed: May 1, 2017
    Publication date: November 30, 2017
    Inventors: Kazuhiro Yamada, Shuzo Iwanaga, Seiichiro Karita, Shingo Okushima, Zentaro Tamenaga, Noriyasu Nagai, Tatsurou Mori, Akio Saito, Takatsuna Aoki, Akira Yamamoto
  • Publication number: 20170341398
    Abstract: In order that the interior of a cap member, in a case where the cap member abuts to a cover member, is allowed to have improved airtightness so that the cap member can sufficiently function, a sealing member is used to seal between the cover member and first and second flow path members for retaining the cover member.
    Type: Application
    Filed: May 18, 2017
    Publication date: November 30, 2017
    Inventors: Zentaro Tamenaga, Shuzo Iwanaga, Shingo Okushima
  • Publication number: 20170334191
    Abstract: A liquid ejection head includes a support member extending in a first direction, a print element board having an ejection port through which liquid is ejected, and first and second members arranged in the support member adjacent to each other along the first direction, each having a supply path extending in the first direction. The print element board element generates energy used for ejection of the supply paths supplied liquid. The first member includes an outlet port through which the supplied liquid flows out. The second member includes an inlet port through which the liquid from the outlet port flows. The outlet port is provided near a first member supply path end portion on the support member side on which the second member is provided. The inlet port is provided near a second member supply path end portion on the support member side on which the first member is provided.
    Type: Application
    Filed: May 9, 2017
    Publication date: November 23, 2017
    Inventors: Tatsurou Mori, Shuzo Iwanaga, Seiichiro Karita, Kazuhiro Yamada, Akio Saito, Zentaro Tamenaga, Shingo Okushima, Yumi Komamiya, Noriyasu Nagai, Takatsuna Aoki, Akira Yamamoto
  • Publication number: 20170274647
    Abstract: In order to keep possible local temperature differences in a liquid ejection head small to allow stable liquid ejection performance to be achieved, temperatures in a plurality of heating areas in a liquid ejection head are discretely controlled using heating elements and temperature detection elements.
    Type: Application
    Filed: March 15, 2017
    Publication date: September 28, 2017
    Inventors: Takatsuna Aoki, Shuzo Iwanaga, Seiichiro Karita, Kazuhiro Yamada, Shingo Okushima, Zentaro Tamenaga, Akira Yamamoto, Tatsurou Mori, Noriyasu Nagai, Akio Saito, Masashi Hayashi, Takeshi Murase, Yuki Sawai
  • Patent number: 9744760
    Abstract: Provided is a liquid ejection head including: a plurality of recording element substrates including energy generating elements that generate ejection energy for ejecting liquid from ejection orifices; a first support member that supports the plurality of recording element substrates such that the recording element substrates are arranged in one or more lines on a main surface of the first support member; and a second support member that supports the first support member on a surface opposite to the main surface. A first thermal resistance concerning an in-plane direction parallel to the main surface, of a region between the recording element substrates in the first support member is higher than a second thermal resistance concerning a thickness direction of the second support member, of a projection region that overlaps with each recording element substrate in the second support member.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: August 29, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuhiro Yamada, Takuto Moriguchi, Zentaro Tamenaga, Shuzo Iwanaga, Takatsugu Moriya
  • Publication number: 20170239956
    Abstract: The liquid ejection apparatus includes a circulation unit configured to circulate a liquid along a circulation passage extending from a liquid supply source to the liquid supply source through a liquid ejection head. Further, the liquid ejection apparatus includes a deaeration unit configured to perform a deaeration operation of decreasing a dissolved gas amount of the liquid, a recovery unit configured to recover ejection performance of an ejection opening, and a control unit configured to control an operation of driving the circulation unit and the deaeration unit. The control unit starts the deaeration operation and circulates the liquid having been deaerated by the deaeration operation inside a circulation path after the recovery operation and before an initial printing operation after the recovery operation.
    Type: Application
    Filed: February 17, 2017
    Publication date: August 24, 2017
    Inventors: Seiichiro Karita, Shuzo Iwanaga, Kazuhiro Yamada, Takatsuna Aoki, Shingo Okushima, Akio Saito, Akira Yamamoto, Zentaro Tamenaga, Noriyasu Nagai, Tatsurou Mori
  • Publication number: 20170197426
    Abstract: A liquid ejection printing apparatus includes a pressure control assembly that generates a pressure for causing the same liquid to flow to the ejection opening communication passage communicating with an ejection opening of a liquid ejection head. The pressure control assembly includes a first pressure adjustment mechanism that causes a liquid supplied from a first upstream passage to flow therefrom at a first pressure and a second pressure adjustment mechanism that causes a liquid supplied from a second upstream passage therefrom at a second pressure different from the first pressure. The first upstream passage and the second upstream passage communicate with each other and a first downstream passage communicating with the first pressure adjustment mechanism and a second downstream passage communicating with the second pressure adjustment mechanism are respectively connected to the same ejection opening communication passage communicating with the ejection opening.
    Type: Application
    Filed: December 15, 2016
    Publication date: July 13, 2017
    Inventors: Noriyasu Nagai, Shuzo Iwanaga, Seiichiro Karita, Kazuhiro Yamada, Akira Yamamoto, Takatsuna Aoki, Shingo Okushima, Akio Saito, Zentaro Tamenaga, Tatsurou Mori
  • Publication number: 20170197435
    Abstract: A liquid discharge head includes: a plurality of recording element boards each having a plurality each of discharge orifices configured to discharge liquid, liquid supply channels configured to supply liquid to the discharge orifices, and liquid recovery channels configured to recover liquid supplied from the liquid supply channels; a common supply channel communicating with at least one liquid supply channel of the recording element boards and configured to supply liquid to the plurality of recording element boards; and a common recovery channel communicating with at least one liquid recovery channel of the recording element boards and configured to recover liquid from the plurality of recording element boards.
    Type: Application
    Filed: December 22, 2016
    Publication date: July 13, 2017
    Inventors: Akira Yamamoto, Shuzo Iwanaga, Seiichiro Karita, Kazuhiro Yamada, Takatsuna Aoki, Shingo Okushima, Akio Saito, Zentaro Tamenaga, Noriyasu Nagai, Tatsurou Mori
  • Publication number: 20170197434
    Abstract: A liquid discharge head includes discharge orifices, recording elements that generate energy, supply channels that supply liquid to the recording elements, a common supply channel communicating with the supply channels, recovery channels that recover liquid supplied to the recording elements, a common recovery channel that recovers liquid from the recovery channels, a first inlet port that supplies liquid to the common supply channel, a first recovery port that recovers liquid from the first common supply channel, a second inlet port that supplies liquid to the common recovery channel, and a second recovery port that recovers liquid from the second common recovery channel. The first inlet port and the first recovery port communicate without going through channel portions where recording elements are disposed, and the second inlet port and the second recovery port communicate without going through channel portions where recording elements are disposed.
    Type: Application
    Filed: December 22, 2016
    Publication date: July 13, 2017
    Inventors: Takatsuna Aoki, Seiichiro Karita, Shingo Okushima, Eisuke Nishitani, Yumi Komamiya, Kazuhiro Yamada, Zentaro Tamenaga, Noriyasu Nagai, Tatsurou Mori, Shuzo Iwanaga, Akio Saito, Akira Yamamoto
  • Publication number: 20170197417
    Abstract: In a printing apparatus including a circulation system circulating a liquid, a volatile component included in the liquid evaporates from an ejection opening and thus characteristics of the liquid involving with concentration, viscosity and the like change. The invention provides a printing apparatus including: a page wide type liquid ejection head that includes an ejection opening ejecting a liquid, a print element generating energy for ejecting a liquid, and a pressure chamber having the print element provided therein; a cap that covers the ejection opening; and a circulator configured to circulate the liquid so that the liquid passes through the pressure chamber, wherein a circulation of the liquid is started after the cap is opened and the circulation of the liquid is stopped in a case where an image forming operation of ejecting the liquid from the ejection opening on the basis of a job is ended.
    Type: Application
    Filed: December 16, 2016
    Publication date: July 13, 2017
    Inventors: Seiichiro Karita, Shuzo Iwanaga, Kazuhiro Yamada, Akio Saito, Zentaro Tamenaga, Shingo Okushima, Yumi Komamiya, Tatsurou Mori, Takatsuna Aoki, Noriyasu Nagai, Akira Yamamoto
  • Publication number: 20170197432
    Abstract: A liquid ejection apparatus of the invention is a liquid ejection apparatus including a liquid storage container that stores liquid, a circulation mechanism that circulates liquid in a circulation path, and a liquid ejection head fluidly-connected to the liquid storage container, the liquid ejection head having a plurality of ejection openings, wherein the liquid ejection head includes at least a pair of common passages and a plurality of individual passages that connect one of the pair of common passages to the other one of the pair of common passages and communicate with the plurality of ejection openings, respectively, and at least a pair of pressure adjustment mechanisms whose pressures are set to different control pressures is connected to respective upstream sides or downstream sides of the pair of common passages.
    Type: Application
    Filed: December 21, 2016
    Publication date: July 13, 2017
    Inventors: Kazuhiro Yamada, Takatsuna Aoki, Seiichiro Karita, Shuzo Iwanaga, Akio Saito, Shingo Okushima, Zentaro Tamenaga, Yumi Komamiya, Noriyasu Nagai, Tatsurou Mori, Akira Yamamoto
  • Publication number: 20170197439
    Abstract: A liquid ejection head capable of suppressing a change in pressure of a pressure chamber, a liquid ejection apparatus, and a manufacturing method are provided. For that reason, a lid member is formed on a wafer-shaped element board and the element board is cut into chips to manufacture a print element board.
    Type: Application
    Filed: December 22, 2016
    Publication date: July 13, 2017
    Inventors: Shingo Okushima, Takatsuna Aoki, Seiichiro Karita, Noriyasu Nagai, Tamaki Sato, Tetsushi Ishikawa, Yasuaki Tominaga, Manabu Otsuka, Shuzo Iwanaga, Tatsurou Mori, Kazuhiro Yamada, Akira Yamamoto, Zentaro Tamenaga, Akio Saito
  • Publication number: 20170197431
    Abstract: A liquid ejection apparatus using a liquid ejection head and ejecting a liquid from the liquid ejection head includes a liquid supply unit that has a supply passage of the liquid supplied to the liquid ejection head and a collection passage of the liquid collected from the liquid ejection head, and supplies and collects the liquid by generating a difference between a pressure of the liquid in the supply passage and a pressure of the liquid in the collection passage, and a flow resistance adjustment unit provided in the supply passage and/or the collection passage.
    Type: Application
    Filed: December 16, 2016
    Publication date: July 13, 2017
    Inventors: Kazuhiro Yamada, Shuzo Iwanaga, Seiichiro Karita, Takatsuna Aoki, Shingo Okushima, Akira Yamamoto, Zentaro Tamenaga, Noriyasu Nagai, Tatsurou Mori, Akio Saito
  • Publication number: 20170197407
    Abstract: In a printing apparatus including a circulation system circulating a liquid, a volatile component included in the liquid evaporates from an ejection opening and thus characteristics of the liquid involving with concentration or viscosity change. The invention provides a printing apparatus that uses a liquid ejection head including an ejection opening ejecting a liquid, a print element generating energy for ejecting a liquid, and a pressure chamber having the print element provided therein, the printing apparatus including: a circulator configured to circulate the liquid so that the liquid passes through the pressure chamber; and a concentration adjustment unit configured to adjust a concentration of a liquid inside a liquid circulation system by discharging the liquid from the inside of the liquid circulation system and replenishing the liquid into the liquid circulation system from the outside of the liquid circulation system in response to the amount of the discharged liquid.
    Type: Application
    Filed: December 16, 2016
    Publication date: July 13, 2017
    Inventors: Seiichiro Karita, Shuzo Iwanaga, Kazuhiro Yamada, Takatsuna Aoki, Shingo Okushima, Zentaro Tamenaga, Yumi Komamiya, Noriyasu Nagai, Tatsurou Mori, Yoshiyuki Nakagawa, Akira Yamamoto
  • Patent number: 9539808
    Abstract: A liquid ejection head including a recording element substrate at one side portion of which an electrode is provided, an electric wiring board arranged opposing to the one side portion of the recording element substrate, a connecting member connecting the electrode provided at the one side portion of the recording element substrate to an electrode terminal provided on the electric wiring board, a sealing member formed across the one side portion of the recording element substrate and the electric wiring board so as to cover the connecting member, and a dummy sealing member provided so as to cover an opposite side portion on the side opposite to the one side portion of the recording element substrate.
    Type: Grant
    Filed: April 27, 2015
    Date of Patent: January 10, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Zentaro Tamenaga, Takuto Moriguchi, Shuzo Iwanaga, Takatsugu Moriya, Kazuhiro Yamada, Akira Yamamoto
  • Patent number: 9469111
    Abstract: A liquid ejection head includes a plurality of ejection members, each having an ejection port for ejecting liquid and a liquid chamber for supplying liquid to the ejection port, a base substrate carrying the plurality of ejection members arranged thereon, the base substrate being provided with a common flow channel for supplying liquid to the plurality of liquid chambers, and a plurality of branch ports each allowing the common flow channel to communicate with the plurality of liquid chambers. Each of the branch ports is provided with a notch portion at an upstream side thereof as viewed in the flow direction of liquid flowing through the common flow channel.
    Type: Grant
    Filed: September 4, 2014
    Date of Patent: October 18, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuhiro Yamada, Takatsugu Moriya, Zentaro Tamenaga
  • Patent number: 9358803
    Abstract: In the present invention, an air bubble residing in a filter chamber is purged at a high speed without inducing liquid ejection deficiency at a liquid ejection head. A filter chamber is divided into a first filter chamber and a second filter chamber via a filter. A pump circulates ink through an ink tube and a bypass path between an ink tank and the first filter chamber. A valve capable of regulating a flow of the ink is provided at the ink tube that allows the second filter chamber and a print head to communicate with each other.
    Type: Grant
    Filed: April 21, 2015
    Date of Patent: June 7, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takuto Moriguchi, Shuzo Iwanaga, Kazuhiro Yamada, Zentaro Tamenaga, Takatsugu Moriya
  • Patent number: 9327513
    Abstract: A pressure regulating unit capable of suitably regulating pressure to be applied to liquid, a liquid supplying apparatus, and a liquid ejecting apparatus are provided. An ink communication path allows an ink introducing chamber communicating with an ink inlet and a pressure chamber communicating with an ink outlet to communicate with each other. A part of the pressure chamber is formed of a flexible film. A valve including a valve body and a valve seat adjusts an opening degree of the ink communication path. An urging member applies, to the valve, a first urging force acting in a direction in which the ink communication path is closed. An urging member applies, to the film, a second urging force that is greater than the first urging force and acts in a displacement direction in which the volume of the pressure chamber is reduced.
    Type: Grant
    Filed: April 14, 2015
    Date of Patent: May 3, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takuto Moriguchi, Shuzo Iwanaga, Kazuhiro Yamada, Zentaro Tamenaga, Takatsugu Moriya