Patents by Inventor Hiromasa Amma

Hiromasa Amma 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: 10471719
    Abstract: A filter is compressed between facing surfaces of a first configuration component and a second configuration component, and a molten resin is poured in such a compressed state. Injection molding of the first configuration component and the second configuration component, joining of the configuration components, and sealing of the circumference of the filter are performed by a pair of metal molds.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: November 12, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kyosuke Toda, Yukuo Yamaguchi, Mikiya Umeyama, Satoshi Oikawa, Hiromasa Amma, Takuya Iwano, Satoshi Kimura, Naoko Tsujiuchi, Yasushi Iijima
  • Patent number: 10471728
    Abstract: A page-wide liquid ejection head configured to be removably installed in a main body of a liquid ejection apparatus includes a connection part for liquid through which a liquid is supplied from the main body and an electrical connector through which an electric signal is supplied from the main body. In the liquid ejection head, the connection part for liquid and the electrical connector are located at one side of the liquid ejection head in the longitudinal direction and are provided to face different directions from each other.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: November 12, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Genji Inada, Toshiaki Hirosawa, Hiromasa Amma, Shogo Kawamura, Yasuhiko Osaki, Shin Ishimatsu, Takuya Iwano
  • 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: 10434694
    Abstract: A resin molding method includes a first molding step of molding a first molded part and a second molded part in a mold and a second molding step of joining the first molded part and the second molded part. In the first molding step, the second molded part is formed by injecting resin into an area where a first core movable in the first direction and a second core movable in a second direction are engaged. In the second molding step, the second molded part is joined to the first molded part by injecting the resin while the first core is in contact with the second molded part and the second core is removed from the second molded part. Areas where the first core and the second core are located in the first molding step become hollow areas connected to each other and part of ends of the first core in the first direction is not in contact with the second core.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: October 8, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yasushi Iijima, Yukuo Yamaguchi, Mikiya Umeyama, Satoshi Oikawa, Hiromasa Amma, Takuya Iwano, Satoshi Kimura, Naoko Tsujiuchi, Kyosuke Toda
  • Patent number: 10391767
    Abstract: A page-wide type liquid ejection head includes a plurality of recording element substrates, each having an ejection port array including a plurality of ejection ports, each ejection port communicating with a pressure chamber including therein a recording element, and a liquid supply path for supplying a liquid to the pressure chamber. The liquid ejection head also includes a flow path member mounting the recording element substrates arranged thereon. The flow path member includes common supply flow paths and individual supply flow paths that connect the liquid supply path to the common supply flow paths, and the individual supply flow paths include portions running obliquely to the direction orthogonal to the longitudinal direction of the liquid ejection head.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: August 27, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasuhiko Osaki, Toshiaki Hirosawa, Genji Inada, Hiromasa Amma, Shogo Kawamura, Takuya Iwano, Shin Ishimatsu
  • Patent number: 10384457
    Abstract: A liquid ejection head unit includes a page-wide type liquid ejection head detachably attached to a liquid ejecting apparatus and a protective member detachably attached to the liquid ejection head. The liquid ejection head includes an ejection port surface on which ejection ports are provided. The liquid ejection head includes a first rail portion, the protective member includes a second rail portion along a longitudinal direction thereof, and the protective member is made to slide in a first direction along the longitudinal direction of the liquid ejection head and cover the ejection port surface. The protective member is attached to the liquid ejection head, and then the liquid ejection head and the protective member are moved in a second direction opposite to the first direction and are removed from the liquid ejecting apparatus.
    Type: Grant
    Filed: July 2, 2018
    Date of Patent: August 20, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomoki Tsuji, Toshiaki Hirosawa, Hiromasa Amma, Takuya Iwano, Akira Kida, Tetsuji Kurata, Atsushi Kohnotoh
  • Patent number: 10363692
    Abstract: There is provided a manufacturing method for molding a liquid supply member by using a first mold and a second mold in which the first mold is capable of being slid relatively to the second mold, the method including a first molding step of performing injection molding to form a first and second component parts of the liquid supply member at different positions from each other, an evacuating step of sliding the formed second component part in a direction intersecting with a direction of sliding of the first mold relative to the second mold and with a direction of the opening and the closing the first and the second mold, a contacting step of bringing the formed second component part into contact with the molded first component part, and a second molding step of performing injection molding to join the first component part and the second component part.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: July 30, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Satoshi Oikawa, Yukuo Yamaguchi, Mikiya Umeyama, Hiromasa Amma, Takuya Iwano, Satoshi Kimura, Naoko Tsujiuchi, Yasushi Iijima, Kyosuke Toda
  • Patent number: 10307967
    Abstract: Provided is construction that in die slide injection molding, surely leaves each part in a mold on a specified side in the stage of opening a molding mold. In order to accomplish this, in an opening step, a push-out mechanism that applies a force on at least one of the individual parts is used to make the part surely belong to a desired mold.
    Type: Grant
    Filed: May 17, 2016
    Date of Patent: June 4, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kyosuke Toda, Yukuo Yamaguchi, Mikiya Umeyama, Satoshi Oikawa, Hiromasa Amma, Takuya Iwano, Satoshi Kimura, Naoko Tsujiuchi, Yasushi Iijima
  • Patent number: 10300643
    Abstract: First and second constituting components are injection-molded and joined within one pair of molds. In order to join the first and second constituting components, one of the respective regions of the first and second constituting components abutted to each other is pushed into the other.
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: May 28, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Naoko Tsujiuchi, Yukuo Yamaguchi, Mikiya Umeyama, Satoshi Oikawa, Hiromasa Amma, Takuya Iwano, Satoshi Kimura, Yasushi Iijima, Kyosuke Toda
  • Publication number: 20190009542
    Abstract: A liquid ejection head unit includes an ejection port surface on which an ejection port is provided, includes a page-wide type liquid ejection head detachably attached to a liquid ejecting apparatus and a protective member detachably attached to the liquid ejection head, the liquid ejection head includes a first rail portion, the protective member includes a second rail portion along a longitudinal direction thereof, the protective member is made to slide to a first direction along the longitudinal direction of the liquid ejection head and covers the ejection port surface, the protective member is attached to the liquid ejection head and then, the liquid ejection head and the protective member are moved in a second direction opposite to the first direction and are removed from the liquid ejecting apparatus.
    Type: Application
    Filed: July 2, 2018
    Publication date: January 10, 2019
    Inventors: Tomoki Tsuji, Toshiaki Hirosawa, Hiromasa Amma, Takuya Iwano, Akira Kida, Tetsuji Kurata, Atsushi Kohnotoh
  • Publication number: 20190009535
    Abstract: A page-wide type liquid ejection head includes a plurality of recording element substrates, each having an ejection port array including a plurality of ejection ports, each ejection port communicating with a pressure chamber including therein a recording element, and a liquid supply path for supplying a liquid to the pressure chamber. The liquid ejection head also includes a flow path member mounting the recording element substrates arranged thereon. The flow path member includes common supply flow paths and individual supply flow paths that connect the liquid supply path to the common supply flow paths, and the individual supply flow paths include portions running obliquely to the direction orthogonal to the longitudinal direction of the liquid ejection head.
    Type: Application
    Filed: July 5, 2018
    Publication date: January 10, 2019
    Inventors: Yasuhiko Osaki, Toshiaki Hirosawa, Genji Inada, Hiromasa Amma, Shogo Kawamura, Takuya Iwano, Shin Ishimatsu
  • Publication number: 20190009540
    Abstract: A liquid ejection head unit is formed by arranging a plurality of recording element substrates in a first direction. The recording element substrate has an ejection orifice from which a liquid is ejected. The liquid ejection head unit includes: rail portions extending in the first direction and a protective member which is detachably fitted on the rail portions. The protective member is movable along the rail portions between a first position and a second position. The first position allows the protective member to cover whole surfaces of the plurality of recording element substrates. The second position allows the plurality of recording element substrates to be exposed so as to allow a liquid to be ejected from the ejection orifice.
    Type: Application
    Filed: June 29, 2018
    Publication date: January 10, 2019
    Inventors: Takuya Iwano, Toshiaki Hirosawa, Hiromasa Amma, Tomoki Tsuji, Akira Kida, Tetsuji Kurata, Atsushi Kohnotoh
  • Publication number: 20190001674
    Abstract: The liquid ejection head 1 includes an element substrate 4 including an energy-generating element that applies ejection energy to liquid, a first electric wiring board 7 electrically connected to the element substrate 4, and a second electric wiring board 9 on which an integrated circuit element 10 is mounted and which is electrically connected to the first electric wiring board 7. An electric signal is supplied to the integrated circuit element 10 mounted on the second electric wiring board 9 through the first electric wiring board 7, processed by the integrated circuit element 10, and supplied to the energy-generating element through the second electric wiring board 9 and the first electric wiring board 7.
    Type: Application
    Filed: June 12, 2018
    Publication date: January 3, 2019
    Inventors: Shin Ishimatsu, Toshiaki Hirosawa, Genji Inada, Hiromasa Amma, Shogo Kawamura, Yasuhiko Osaki, Takuya Iwano
  • Publication number: 20180361748
    Abstract: A page-wide liquid ejection head configured to be removably installed in a main body of a liquid ejection apparatus includes a connection part for liquid through which a liquid is supplied from the main body and an electrical connector through which an electric signal is supplied from the main body. In the liquid ejection head, the connection part for liquid and the electrical connector are located at one side of the liquid ejection head in the longitudinal direction and are provided to face different directions from each other.
    Type: Application
    Filed: June 1, 2018
    Publication date: December 20, 2018
    Inventors: Genji Inada, Toshiaki Hirosawa, Hiromasa Amma, Shogo Kawamura, Yasuhiko Osaki, Shin Ishimatsu, Takuya Iwano
  • Publication number: 20180304620
    Abstract: A liquid ejecting head including a print element substrate including an ejection opening for ejecting a liquid, a wiring member including wiring electrically connected to the print element substrate, a connection electrically connecting the print element substrate to the wiring member, a support member supporting the wiring member, a sealing material sealing the connection, and a cover member provided on the support member. In the liquid ejecting head, the wiring member is a strip-shaped member, and a portion of the wiring member provided on a surface of the support member that supports the wiring member is covered by the sealing material and the cover member.
    Type: Application
    Filed: April 19, 2018
    Publication date: October 25, 2018
    Inventors: Shogo Kawamura, Toshiaki Hirosawa, Genji Inada, Hiromasa Amma, Yasuhiko Osaki, Takuya Iwano, Shin Ishimatsu
  • Patent number: 10081185
    Abstract: An opposed surface of a first flow path forming member has a groove portion forming a supply passage, and a protruding portion protruding from the edge of the groove portion to form the side wall of the groove portion. An opposed surface of a second flow path forming member has a lid portion that abuts against the protruding portion of the first flow path forming member to cover the opening of the groove portion in the first flow path forming member. A joining member is formed by injection-molding of a resin to abut against an outer surface of the protruding portion of the first flow path forming member and the opposed surfaces of the first and second flow path forming members.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: September 25, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Satoshi Kimura, Yukuo Yamaguchi, Mikiya Umeyama, Yasushi Iijima, Kyosuke Toda, Naoko Tsujiuchi, Hiromasa Amma, Takuya Iwano, Satoshi Oikawa
  • Patent number: 10071512
    Abstract: Provided is a method for manufacturing a liquid-ejecting head whereby in die slide injection molding it is possible to stably inject resin in secondary molding without damaging the shapes of parts that were formed in primary molding. In order for that, in the connecting section in which a convex section of a cover member is inserted into an opening of a liquid-supply member, the closest distance to the opening in the area where secondary resin is injected is made larger than the gap between the opening and the convex section. As a result, the resin is prevented from flowing into a liquid path during the secondary molding.
    Type: Grant
    Filed: May 17, 2016
    Date of Patent: September 11, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Satoshi Kimura, Yukuo Yamaguchi, Mikiya Umeyama, Satoshi Oikawa, Hiromasa Amma, Takuya Iwano, Naoko Tsujiuchi, Yasushi Iijima, Kyosuke Toda
  • 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
  • Publication number: 20180141340
    Abstract: A method of manufacturing a liquid supply unit includes a first molding step and a second molding step. In a first molding step, a resin is injected into different positions inside a mold assembly and a first member having a first contact portion, a second member having a second contact portion and an intermediate passage member having a passage structure to connect the first contact portion to the second contact portion are molded. In a second molding step, the mold assembly is disassembled, a die slide mold disposed inside the mold assembly is moved for positioning the members. Then, the mold assembly is clamped again and a resin is injected into the mold assembly. The first contact portion and the second contact portion are respectively held on the same surfaces inside the mold assembly during a period from the first molding step to completion of the second molding step.
    Type: Application
    Filed: November 8, 2017
    Publication date: May 24, 2018
    Inventors: Soji Kondo, Yukuo Yamaguchi, Toshiaki Hirosawa, Hiromasa Amma, Takuya Iwano, Noriyasu Nagai
  • Publication number: 20180141341
    Abstract: A method of manufacturing a liquid ejecting head has a first molding step, a step of performing positioning and a second molding step. In the first molding step, a first member, a second member, and a third member are molded by injecting a resin at different locations inside of a set of a fixed mold, an intermediate movable mold, and a movable mold. In the step of performing positioning, the set is detached in a first direction and the intermediate movable mold and the movable mold are moved in a second direction. In the second molding step, a resin is injected to the inside of the set that is clamped to bond. During a period from the first molding step to completion of the second molding step, the first member, the second member, and the third member are held by insert mold pieces used for molding the members, respectively, in the first molding step.
    Type: Application
    Filed: November 9, 2017
    Publication date: May 24, 2018
    Inventors: Hiromasa Amma, Yukuo Yamaguchi, Toshiaki Hirosawa, Soji Kondo, Takuya Iwano, Noriyasu Nagai