Patents by Inventor Tsutomu Maekawa

Tsutomu Maekawa 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: 20240070097
    Abstract: A device includes a first interface unit connected to a first controller area network (CAN) bus, a second interface unit connected to a second CAN bus, and a control unit configured to identify, in a case where transmission of a CAN frame is started, a CAN bus detected to be in a dominant state first after end of arbitration from the first CAN bus or the second CAN bus, as a CAN bus to which a transmission source device of the CAN frame is connected.
    Type: Application
    Filed: August 28, 2023
    Publication date: February 29, 2024
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, National University Corporation YOKOHAMA National University
    Inventors: Yosuke MAEKAWA, Camille GAY, Tsutomu MATSUMOTO
  • Patent number: 11560491
    Abstract: A liquid composition includes an inorganic particle and a multivalent metal salt, wherein the liquid composition has a tacking force of 50 mN or less in an area of cast-coated paper where the liquid composition is applied in an amount of 0.12 mg/cm2 for the cast-coated paper followed by heating at 80 degrees C. for 15 seconds.
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: January 24, 2023
    Assignee: Ricoh Company, Ltd.
    Inventors: Dongsik Jang, Yukitaka Watarai, Tsutomu Maekawa, Takashi Tamai, Atsufumi Hanazawa, Koji Katsuragi
  • Patent number: 11040561
    Abstract: An ink and processing liquid set contains a processing liquid to be applied to a recording medium, the processing liquid including a multivalent metal salt and an ink to be applied to an area of the recording medium where the processing liquid has been applied, the ink including a urethane resin, a styrene-acrylic resin, and a pigment, wherein the following relations are satisfied: 0.5?B/C?0.7, where B represents a static surface tension of the ink and C represents a static surface tension of the processing liquid; and 0.5?E/D?0.9, and 35 (mN/m)?E?55 (mN/m), where D represents a dynamic surface tension at 15 ms of the processing liquid and E represents a dynamic surface tension at 1500 ms of the processing liquid.
    Type: Grant
    Filed: March 13, 2019
    Date of Patent: June 22, 2021
    Assignee: Ricoh Company, Ltd.
    Inventors: Takashi Tamai, Dongsik Jang, Atsufumi Hanazawa, Satoshi Takahashi, Yoshiki Yanagawa, Tsutomu Maekawa, Yukitaka Watarai
  • Publication number: 20200399495
    Abstract: A liquid composition includes an inorganic particle and a multivalent metal salt, wherein the liquid composition has a tacking force of 50 mN or less in an area of cast-coated paper where the liquid composition is applied in an amount of 0.12 mg/cm2 for the cast-coated paper followed by heating at 80 degrees C. for 15 seconds.
    Type: Application
    Filed: January 28, 2019
    Publication date: December 24, 2020
    Inventors: Dongsik JANG, Yukitaka WATARAI, Tsutomu MAEKAWA, Takashi TAMAI, Atsufumi HANAZAWA, Koji KATSURAGI
  • Patent number: 10851253
    Abstract: An image forming method includes applying white ink containing hollow resin particulate to a recording medium and contacting a heating roller having a diameter of 200 mm or less with a first surface of the recording medium.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: December 1, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Tsutomu Maekawa, Koji Katsuragi, Takashi Tamai, Atsufumi Hanazawa, Dongsik Jang
  • Patent number: 10647129
    Abstract: A printing method includes applying a processing fluid to a recording medium and applying an ink to the recording medium, wherein the processing fluid contains a first nonionic resin including the following structure unit a-1, the first nonionic resin having a glass transition temperature of 15 degrees C.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: May 12, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Atsufumi Hanazawa, Hiroshi Gotou, Tsutomu Maekawa, Yukitaka Watarai, Koji Katsuragi, Tomohiro Nakagawa
  • Publication number: 20190283479
    Abstract: An ink and processing liquid set contains a processing liquid to be applied to a recording medium, the processing liquid comprising a multivalent metal salt and an ink to be applied to an area of the recording medium where the processing liquid has been applied, the ink comprising a urethane resin, a styrene-acrylic resin, and a pigment, wherein the following relations are satisfied: 0.5?B/C?0.7, where B represents a static surface tension of the ink and C represents a static surface tension of the processing liquid; and 0.5?E/D?0.9, and 35 (mN/m)?E?55 (mN/m), where D represents a dynamic surface tension at 15 ms of the processing liquid and E represents a dynamic surface tension at 1500 ms of the processing liquid.
    Type: Application
    Filed: March 13, 2019
    Publication date: September 19, 2019
    Inventors: Takashi TAMAI, Dongsik Jang, Atsufumi Hanazawa, Satoshi Takahashi, Yoshiki Yanagawa, Tsutomu Maekawa, Yukitaka Watarai
  • Publication number: 20190284412
    Abstract: An image forming method includes applying white ink containing hollow resin particulate to a recording medium and contacting a heating roller having a diameter of 200 mm or less with a first surface of the recording medium.
    Type: Application
    Filed: March 15, 2019
    Publication date: September 19, 2019
    Inventors: Tsutomu MAEKAWA, Koji KATSURAGI, Takashi TAMAI, Atsufumi HANAZAWA, Dongsik JANG
  • Publication number: 20180265728
    Abstract: A printing method includes applying a processing fluid to a recording medium and applying an ink to the recording medium, wherein the processing fluid contains a first nonionic resin including the following structure unit a-1, the first nonionic resin having a glass transition temperature of 15 degrees C.
    Type: Application
    Filed: March 7, 2018
    Publication date: September 20, 2018
    Inventors: Atsufumi Hanazawa, Hiroshi Gotou, Tsutomu Maekawa, Yukitaka Watarai, Koji Katsuragi, Tomohiro Nakagawa
  • Patent number: 9789720
    Abstract: To provide an image forming method, including applying a pre-treatment liquid on a recording medium including a substrate and a coating layer at least on one surface of the substrate, wherein the pre-treatment liquid is applied on a surface of the recording layer with the coating layer; drying the recording medium on which the pre-treatment liquid has been applied; and forming an image on the recording medium after drying by discharging a water-based ink by inkjet method, wherein the pre-treatment liquid includes a water-soluble cationic polymer, an ammonium salt of an organic acid and water, and wherein the water-based ink includes water and negatively charged colored particles including a colorant.
    Type: Grant
    Filed: July 5, 2013
    Date of Patent: October 17, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Shosuke Aoai, Tsutomu Maekawa, Michihiko Namba, Shinya Seno, Hiroshi Gotou, Akihiko Gotoh
  • Publication number: 20170247556
    Abstract: To provide an ink, which contains: water; a pigment; and a first water-soluble organic solvent, wherein the first water-soluble organic solvent contains a water-soluble organic solvent (G) having a boiling point of 280° C. to 300° C., a water-soluble organic solvent (X) having a boiling point of 180° C. to 190° C., and a water-soluble organic solvent (Y) having a boiling point of 190° C. to 200° C., wherein the first water-soluble organic solvent contains a water-soluble organic solvent (G) having a boiling point of 280° C. to 300° C., a water-soluble organic solvent (X) having a boiling point of 180° C. to 190° C., and a water-soluble organic solvent (Y) having a boiling point of 190° C. to 200° C., wherein the ink satisfies the following formulae: 24?X?40 2?X/Y?20 where X [% by mass] is an amount of the water-soluble organic solvent (X), and Y [% by mass] is an amount of the water-soluble organic solvent (Y).
    Type: Application
    Filed: August 31, 2015
    Publication date: August 31, 2017
    Inventors: Yuuki YOKOHAMA, Tsutomu MAEKAWA, Akiko BANNAI, Mariko KOJIMA, Hiroshi GOTOU, Tomohiro NAKAGAWA
  • Publication number: 20160272828
    Abstract: An ink including water, a water-soluble organic solvent, a resin-coated pigment coaled with a resin (A), and a resin emulsion including a resin (B) is provided. The resin (B) has the same composition as the resin (A) and a volume average particle diameter of from 8 to 19 nm. The total content rate of the resin (A) and the resin (B) in the ink ranges from 2% to 11% by mass. The content of the resin (B) ranges from 30% to 55% by mass of the total content of the resin (A) and the resin (B).
    Type: Application
    Filed: March 18, 2016
    Publication date: September 22, 2016
    Inventors: Yukiko TAKAMURA, Tsutomu Maekawa, Yuuki Yokohama, Akiko Bannai, Shosuke Aoai
  • Patent number: 9217092
    Abstract: An inkjet recording method, containing: applying a stimulus to an inkjet recording ink to jet the ink, to form an image on a recording medium, wherein the ink contains water, a water-soluble organic solvent, a colorant, and a surfactant, and has a predetermined surface life time as measured by a maximum bubble pressure method and a predetermined static surface tension, wherein the recording medium contains a support, and a recording layer provided at least one surface of the support, where the recording layer contains a cationic resin in a predetermined amount, and is a medium for a concealing postcard where the recording medium is folded to bond a surface of the recording layer to face each other with an adhesive after information is recorded on the surface of the recording layer, in which the surface of the recording layer has a predetermined 10-sec Cobb size degree.
    Type: Grant
    Filed: May 15, 2013
    Date of Patent: December 22, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Kiminori Masuda, Mariko Kojima, Tsutomu Maekawa, Akiko Bannai, Takashi Tamai
  • Patent number: 9205677
    Abstract: An inkjet recording method includes imparting a pre-processing fluid to a coated layer provided on at least one surface of the substrate of a recording medium, drying the pre-processing fluid, and forming an image on the recording medium by ejecting an aqueous ink thereon. The pre-processing fluid contains a hydrosoluble organic solvent, a flocculating agent formed of a quaternary salt of an adduct of alkyl amine.epichlorohydrine represented by the following chemical formula 1, and a nonion-based surfactant represented by the following chemical formula 2, wherein the aqueous ink comprises a colorant, a hydrosoluble organic solvent, and a fluorine-containing surfactant represented by the following chemical formula 3 or 4: C6F13—CH2CH2O(CH2CH2O)nH??(3) Chemical formula 3 CnF2n+1—CH2CH(OH)CH2—O—(CH2CH2O)a—Y??(4) Chemical formula 4.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: December 8, 2015
    Assignee: RICOH COMPANY, LTD.
    Inventors: Michihiko Namba, Shosuke Aoai, Tsutomu Maekawa
  • Patent number: 9206329
    Abstract: A pre-treatment liquid includes a flocculant formed of a water-soluble cationic polymer obtained by copolymerizing an amine monomer and an epihalohydrin monomer; a surface conditioner; a surfactant; a water-soluble organic solvent; and water.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: December 8, 2015
    Assignee: RICOH COMPANY, LTD.
    Inventors: Michihiko Namba, Shohsuke Aoai, Tsutomu Maekawa, Shinya Seno
  • Publication number: 20150283828
    Abstract: To provide an image forming method, including: a pre-treatment liquid application step for applying a pre-treatment liquid on a recording medium including a substrate and a coating layer at least on one surface of the substrate, wherein the pre-treatment liquid is applied on a surface of the recording layer with the coating layer! a drying step for drying the recording medium on which the pre-treatment liquid has been applied; and an image forming step for forming an image on the recording medium after drying by discharging a water-based ink by inkjet method, wherein the pre-treatment liquid includes a water-soluble cationic polymer, an ammonium salt of an organic acid and water, and wherein the water-based ink includes water and negatively charged colored particles including a colorant.
    Type: Application
    Filed: July 5, 2013
    Publication date: October 8, 2015
    Inventors: Shosuke Aoai, Tsutomu Maekawa, Michihiko Namba, Shinya Seno, Hiroshi Gotou, Akihiko Gotoh
  • Publication number: 20150174920
    Abstract: An inkjet recording method includes imparting a pre-processing fluid to a coated layer provided on at least one surface of the substrate of a recording medium, drying the pre-processing fluid, and forming an image on the recording medium by ejecting an aqueous ink thereon. The pre-processing fluid contains a hydrosoluble organic solvent, a flocculating agent formed of a quaternary salt of an adduct of alkyl amine.
    Type: Application
    Filed: December 17, 2014
    Publication date: June 25, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Michihiko Namba, Shosuke AOAI, Tsutomu MAEKAWA
  • Publication number: 20140253631
    Abstract: A pre-treatment liquid includes a flocculant formed of a water-soluble cationic polymer obtained by copolymerizing an amine monomer and an epihalohydrin monomer; a surface conditioner; a surfactant; a water-soluble organic solvent; and water.
    Type: Application
    Filed: November 26, 2013
    Publication date: September 11, 2014
    Applicant: RICOH COMPANY, LTD.
    Inventors: Michihiko Namba, Shohsuke Aoai, Tsutomu Maekawa, Shinya Seno
  • Patent number: 8815140
    Abstract: To provide a method of producing a film, comprising: ejecting a liquid B over a liquid surface of an active energy ray-curable liquid as a liquid A by an inkjet process, according to a predetermined periodic signal; and subsequently applying an active energy ray to the liquid A and the liquid B so as to perform curing and obtain a film which comprises a pattern according to any one of (1) to (4) below, (1) a smooth pattern having a periodic amplitude based upon a trigonometric function, (2) a pattern having a periodic depression, (3) a pattern in the form of a periodic flat surface, and (4) a pattern having a periodic semicylindrical shape.
    Type: Grant
    Filed: April 8, 2011
    Date of Patent: August 26, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Tamotsu Aruga, Shinya Seno, Masayuki Koyano, Eiji Noda, Noriyasu Takeuchi, Tsutomu Maekawa, Takao Hiraoka, Tomoko Hasegawa, Okitoshi Kimura, Soh Noguchi
  • Patent number: 8740374
    Abstract: An ink jet recording method including: applying at least two energy beam curable liquids different from each other in surface tension on a recording medium to form an energy beam curable liquid layer having a distribution pattern of different surface tensions; ejecting an energy beam curable ink on the energy beam curable liquid layer formed on the recording medium; and irradiating the energy beam curable liquid layer and the energy beam curable ink with energy beams to cure the energy beam curable liquid layer and the energy beam curable ink to form an image.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: June 3, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Shin-ya Seno, Tamotsu Aruga, Masayuki Koyano, Eiji Noda, Norlyasu Takeuchi, Okitoshi Kimura, Tsutomu Maekawa, Takao Hiraoka, Soh Noguchi, Tomoko Hasegawa