Patents by Inventor Manabu Arita

Manabu Arita 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: 11498351
    Abstract: A method for producing a laminated body including a first curable liquid composition and a second curable liquid composition, the method including: forming a first liquid layer formed of the first curable liquid composition; impacting the second curable liquid composition onto the first liquid layer, to form a second liquid droplet layer formed of the second curable liquid composition inside the first liquid layer or at a lower part of the first liquid layer in a direction in which second liquid droplets for the second liquid droplet layer are impacted onto the first liquid layer; and curing the first liquid layer and the second liquid droplet layer.
    Type: Grant
    Filed: November 10, 2020
    Date of Patent: November 15, 2022
    Assignee: Ricoh Company, Ltd.
    Inventors: Manabu Arita, Daisuke Ozaki
  • Publication number: 20220306885
    Abstract: Provided is an ink set including a first ink and a second ink. The second ink contains a high-viscosity component having a viscosity of 500 mPa·s or higher at 25 degrees C., and a low-viscosity component having a viscosity of 30 mPa·s or lower at 25 degrees C. A static surface tension ?1 (mN/m) of the first ink and a static surface tension ?2 (mN/m) of the second ink satisfy General formula (1) below. 1 (mN/m)??1??2?5 (mN/m)??General formula (1) A content A (% by mass) of each component contained in the first ink, a static surface tension B (mN/m) of each component contained in the first ink, a content C (% by mass) of each component contained in the second ink, and a static surface tension D (mN/m) of each component contained in the second ink satisfy General formula (2) below.
    Type: Application
    Filed: March 14, 2022
    Publication date: September 29, 2022
    Applicant: Ricoh Company, Ltd.
    Inventors: Manabu ARITA, Shunsuke Kobayashi
  • Patent number: 11241821
    Abstract: A method of manufacturing a laminar object includes discharging an active energy ray curable ink A, irradiating the active energy ray curable ink A with active energy rays, discharging an active energy ray curable ink B, and irradiating the active energy ray curable ink B with the active energy rays, wherein the amount of the active energy rays per pass is greater in the irradiating of the active energy ray curable ink A than that in the irradiating of the active energy ray curable ink B, wherein a surface roughness Sq1 of solid printed matter having a thickness of 40 ?m obtained in the discharging and the irradiating of the active energy ray curable ink A is 1.5 times or more than a surface roughness Sq2 of solid printed matter having a thickness of 40 ?m obtained in the discharging and irradiating of the active energy ray curable ink B.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: February 8, 2022
    Assignee: RICOH COMPANY, LTD.
    Inventors: Manabu Arita, Mie Yoshino
  • Patent number: 11179950
    Abstract: A liquid discharge apparatus includes a liquid discharge device, circuitry, and a curing device. The liquid discharge device is configured to discharge a liquid having a curing degree variable by a stimulation amount while relatively moving to a recording medium. The circuitry is configured to acquire surface roughness information indicating glossiness of a formed object formed on the recording medium and set a stimulation amount for the liquid based on the surface roughness information. The curing device is configured to stimulate the liquid discharged by the liquid discharge device based on the stimulation amount set by the circuitry to cure the liquid. The circuitry is configured to set, based on the surface roughness information, the stimulation amount for each region stimulated by the curing device in a same plane of the formed object.
    Type: Grant
    Filed: August 10, 2020
    Date of Patent: November 23, 2021
    Assignee: RICOH COMPANY, LTD.
    Inventors: Aya Yamasawa, Manabu Arita, Toshihito Kamei, Shinichi Hatanaka
  • Publication number: 20210138817
    Abstract: A method for producing a laminated body including a first curable liquid composition and a second curable liquid composition, the method including: forming a first liquid layer formed of the first curable liquid composition; impacting the second curable liquid composition onto the first liquid layer, to form a second liquid droplet layer formed of the second curable liquid composition inside the first liquid layer or at a lower part of the first liquid layer in a direction in which second liquid droplets for the second liquid droplet layer are impacted onto the first liquid layer; and curing the first liquid layer and the second liquid droplet layer.
    Type: Application
    Filed: November 10, 2020
    Publication date: May 13, 2021
    Inventors: Manabu Arita, Daisuke Ozaki
  • Patent number: 10953679
    Abstract: A method for manufacturing printed matter is provided. The method includes the steps of: irradiating applied droplets of an active energy ray curable composition with an active energy ray having an illuminance less than 0.8 times a maximum gloss illuminance; and applying droplets of the active energy ray curable composition onto the applied droplets irradiated in the irradiating.
    Type: Grant
    Filed: March 13, 2019
    Date of Patent: March 23, 2021
    Assignee: Ricoh Company, Ltd.
    Inventor: Manabu Arita
  • Publication number: 20200369046
    Abstract: A liquid discharge apparatus includes a liquid discharge device, circuitry, and a curing device. The liquid discharge device is configured to discharge a liquid having a curing degree variable by a stimulation amount while relatively moving to a recording medium. The circuitry is configured to acquire surface roughness information indicating glossiness of a formed object formed on the recording medium and set a stimulation amount for the liquid based on the surface roughness information. The curing device is configured to stimulate the liquid discharged by the liquid discharge device based on the stimulation amount set by the circuitry to cure the liquid. The circuitry is configured to set, based on the surface roughness information, the stimulation amount for each region stimulated by the curing device in a same plane of the formed object.
    Type: Application
    Filed: August 10, 2020
    Publication date: November 26, 2020
    Inventors: Aya YAMASAWA, Manabu Arita, Toshihito KAMEI, Shinichi Hatanaka
  • Patent number: 10829657
    Abstract: An active energy ray-curable composition is provided which comprises a polymerizable monomer, a polysilane compound containing a phenyl group in a repeating unit, and a photopolymerization initiator.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: November 10, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Hidetoshi Fujii, Michihiko Namba, Manabu Arita
  • Patent number: 10780718
    Abstract: A liquid discharge apparatus includes a liquid discharge device, circuitry, and a curing device. The liquid discharge device is configured to discharge a liquid having a curing degree variable by a stimulation amount while relatively moving to a recording medium. The circuitry is configured to acquire surface roughness information indicating glossiness of a formed object formed on the recording medium and set a stimulation amount for the liquid based on the surface roughness information. The curing device is configured to stimulate the liquid discharged by the liquid discharge device based on the stimulation amount set by the circuitry to cure the liquid. The circuitry is configured to set, based on the surface roughness information, the stimulation amount for each region stimulated by the curing device in a same plane of the formed object.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: September 22, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Aya Yamasawa, Manabu Arita, Toshihito Kamei, Shinichi Hatanaka
  • Patent number: 10723898
    Abstract: In accordance with some embodiments of the present invention, an active energy ray curable composition including a polymerizable compound composition is provided. When the active energy ray curable composition is formed into a film having an average thickness of 10 ?m on a substrate and, after a lapse of 15 seconds, the film is irradiated with an active energy ray having a light quantity of 1,500 mJ/cm2 to become a cured product, the cured product satisfies the following conditions (1) and (2): (1) when the substrate is a polypropylene substrate, the cured product has a glass transition temperature of 60° C. or more; and (2) when the substrate is a polycarbonate substrate, an adhesion between the polycarbonate substrate and the cured product is 70 or more, the adhesion being measured according to a cross-cut adhesion test defined in Japanese Industrial Standards K5400.
    Type: Grant
    Filed: September 10, 2018
    Date of Patent: July 28, 2020
    Assignee: RICOH COMPANY, LTD.
    Inventors: Mie Yoshino, Manabu Arita, Shizuka Kohzuki, Hiroki Kobayashi
  • Publication number: 20200087535
    Abstract: An active energy ray curable composition including a polymerization initiator and a polymerizable compound is provided. When the active energy ray curable composition is formed into a cured film on a substrate under the specific condition, the cured film satisfies the following conditions (1) and (2): (1) when the substrate is a polyethylene terephthalate substrate, the cured film on the substrate has a transmission density of from 1.5 to 3.0 that is measured with a transmission densitometer, and (2) when the substrate is a polycarbonate substrate, the cured film on the substrate has a first length (L1) and a second length (L2) before and after a specific tensile test, respectively, and a ratio of L2/L1 ranges from 1.5 to 4.0.
    Type: Application
    Filed: November 22, 2019
    Publication date: March 19, 2020
    Inventors: Hiroki KOBAYASHI, Mie YOSHINO, Manabu ARITA
  • Publication number: 20190299659
    Abstract: A liquid discharge apparatus includes a liquid discharge device, circuitry, and a curing device. The liquid discharge device is configured to discharge a liquid having a curing degree variable by a stimulation amount while relatively moving to a recording medium. The circuitry is configured to acquire surface roughness information indicating glossiness of a formed object formed on the recording medium and set a stimulation amount for the liquid based on the surface roughness information. The curing device is configured to stimulate the liquid discharged by the liquid discharge device based on the stimulation amount set by the circuitry to cure the liquid. The circuitry is configured to set, based on the surface roughness information, the stimulation amount for each region stimulated by the curing device in a same plane of the formed object.
    Type: Application
    Filed: March 19, 2019
    Publication date: October 3, 2019
    Inventors: Aya YAMASAWA, Manabu ARITA, Toshihito KAMEI, Shinichi HATANAKA
  • Publication number: 20190283478
    Abstract: A method for manufacturing printed matter is provided. The method includes the steps of: irradiating applied droplets of an active energy ray curable composition with an active energy ray having an illuminance less than 0.8 times a maximum gloss illuminance; and applying droplets of the active energy ray curable composition onto the applied droplets irradiated in the irradiating.
    Type: Application
    Filed: March 13, 2019
    Publication date: September 19, 2019
    Inventor: Manabu ARITA
  • Publication number: 20190270901
    Abstract: An active energy ray-curable composition is provided which comprises a polymerizable monomer, a polysilane compound containing a phenyl group in a repeating unit, and a photopolymerization initiator.
    Type: Application
    Filed: February 26, 2019
    Publication date: September 5, 2019
    Inventors: Hidetoshi FUJII, Michihiko NAMBA, Manabu ARITA
  • Publication number: 20190002716
    Abstract: In accordance with some embodiments of the present invention, an active energy ray curable composition including a polymerizable compound composition is provided. When the active energy ray curable composition is formed into a film having an average thickness of 10 ?m on a substrate and, after a lapse of 15 seconds, the film is irradiated with an active energy ray having a light quantity of 1,500 mJ/cm2 to become a cured product, the cured product satisfies the following conditions (1) and (2): (1) when the substrate is a polypropylene substrate, the cured product has a glass transition temperature of 60° C. or more; and (2) when the substrate is a polycarbonate substrate, an adhesion between the polycarbonate substrate and the cured product is 70 or more, the adhesion being measured according to a cross-cut adhesion test defined in Japanese Industrial Standards K5400.
    Type: Application
    Filed: September 10, 2018
    Publication date: January 3, 2019
    Inventors: Mie Yoshino, Manabu Arita, Shizuka Kohzuki, Hiroki Kobayashi
  • Publication number: 20180333909
    Abstract: A method of manufacturing a laminar object includes discharging an active energy ray curable ink A, irradiating the active energy ray curable ink A with active energy rays, discharging an active energy ray curable ink B, and irradiating the active energy ray curable ink B with the active energy rays, wherein the amount of the active energy rays per pass is greater in the irradiating of the active energy ray curable ink A than that in the irradiating of the active energy ray curable ink B, wherein a surface roughness Sq1 of solid printed matter having a thickness of 40 ?m obtained in the discharging and the irradiating of the active energy ray curable ink A is 1.5 times or more than a surface roughness Sq2 of solid printed matter having a thickness of 40 ?m obtained in the discharging and irradiating of the active energy ray curable ink B.
    Type: Application
    Filed: May 16, 2018
    Publication date: November 22, 2018
    Inventors: Manabu ARITA, Mie YOSHINO
  • Patent number: 10100211
    Abstract: In accordance with sonic embodiments of the present invention, an active energy ray curable composition including a polymerizable compound composition is provided. When the active energy ray curable composition is formed into a film having an average thickness of 10 ?m on a substrate and, after a lapse of 15 seconds, the film is irradiated with an active energy ray having a light quantity of 1,500 mJ/cm2 to become a cured product, the cured product satisfies the following conditions (1) and (2): (1) when the substrate is a polypropylene substrate, the cured product has a glass transition temperature of 60° C. or more; and (2) when the substrate is a polycarbonate substrate, an adhesion between the polycarbonate substrate and the cured product is 70 or more, the adhesion being measured according to a cross-cut adhesion test defined in Japanese industrial Standards K5400.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: October 16, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Mie Yoshino, Manabu Arita, Shizuka Kohzuki, Hiroki Kobayashi
  • Publication number: 20180016455
    Abstract: An active energy ray curable composition including a polymerizable compound is provided. When a three-layer cured product of the active energy ray composition is obtained by a specific procedure, the three-layer cured product has (1) a stretchability of 1.1 or more and (2) a glass transition temperature of 50° C. or more. The stretchability is defined by a ratio L2/L1, wherein L1 represents a first length of the cured product before a tensile test and L2 represents a second length of the cured product after the tensile test. The tensile test includes stretching the cured product along with the substrate with a tensile tester at a stretching speed of 20 mm/min and a temperature of 180° C.
    Type: Application
    Filed: September 27, 2017
    Publication date: January 18, 2018
    Inventors: Shizuka KOHZUKI, Mie YOSHINO, Manabu ARITA, Hiroki KOBAYASHI
  • Patent number: 9815993
    Abstract: An active energy ray curable composition including a polymerizable compound is provided. When a three-layer cured product of the active energy ray composition is obtained by a specific procedure, the three-layer cured product has (1) a stretchability of 1.1 or more and (2) a glass transition temperature of 50° C. or more. The stretchability is defined by a ratio L2/L1, wherein L1 represents a first length of the cured product before a tensile test and L2 represents a second length of the cured product after the tensile test. The tensile test includes stretching the cured product along with the substrate with a tensile tester at a stretching speed of 20 mm/min and a temperature of 180° C.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: November 14, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Shizuka Kohzuki, Mie Yoshino, Manabu Arita, Hiroki Kobayashi
  • Patent number: 9790381
    Abstract: An active energy ray curable composition is provided. The active energy ray curable composition includes polymerizable compounds including a first monofunctional monomer having a polar group, a second monofunctional monomer having no polar group, and a polyfunctional monomer. The homopolymer of each of the first monofunctional monomer and the second monofunctional monomer has a glass transition temperature of 50° C. or more. The first monofunctional monomer and the second monofunctional monomer account for 50% by mass or more of the polymerizable compounds in total, and the polyfunctional monomer accounts for 30% by mass or less of the polymerizable compounds.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: October 17, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Manabu Arita, Mie Yoshino