Patents by Inventor Naoto Shimura

Naoto Shimura 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: 11964495
    Abstract: Provided is an ink set including: an ink containing a cyan pigment; an ink containing a magenta pigment; and an ink containing a yellow pigment, wherein the proportion of the cyan pigment is 0.70% by mass or greater but 1.40% by mass or less, and wherein the proportion of the magenta pigment and the proportion of the yellow pigment are both higher than the proportion of the cyan pigment.
    Type: Grant
    Filed: January 21, 2020
    Date of Patent: April 23, 2024
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiromi Sakaguchi, Itsuro Sasaki, Ayaka Tanaka, Naoto Shimura, Shunsuke Horie, Hiroshi Gotou, Yuta Nakamura
  • Patent number: 11904600
    Abstract: A printing method includes discharging ink to a substrate, heating a non-ink-discharged side of the substrate at T1, and heating an ink-discharged side of the substrate at T2, wherein the ink contains an organic solvent A (boiling point lower than 250 degrees C.), an organic solvent B (boiling point of 250 degrees C.), and a resin, where 0 degrees C. C?T2?T1?90 degrees C. is satisfied, the proportion (organic solvent A/ink) is 30 percent by mass or less, the proportion (organic solvent B/ink) is 1 to 3 percent by mass, the proportion (resin/ink) is 5 to 15 percent by mass, the ink has a viscosity of 8.0 to 11.0 mPa-s at 25 degrees C. and 5.5 to 11.0 mPa-s at 36 degrees C., and a 2.5 ?L ink droplet discharged to the substrate shrinks to 0.1 ?L within 10.0 seconds at 25 degrees C.
    Type: Grant
    Filed: March 29, 2022
    Date of Patent: February 20, 2024
    Assignee: RICOH COMPANY, LTD.
    Inventors: Naoto Shimura, Yuya Hirokawa, Yuusuke Koizuka, Takayuki Shimizu, Itsuro Sasaki, Shunsuke Horie, Nozomi Terai, Kenta Hagiwara
  • Patent number: 11851571
    Abstract: Provided is an ink set including standard ink and light ink. Standard ink includes cyan, magenta, and yellow inks. Light ink includes a light cyan or light magenta ink, or both. The pigment concentration in cyan ink is 1.9% by mass or greater but 3.6% by mass or less. The pigment concentration in light cyan ink is 0.4% by mass or greater but 1.4% by mass or less. The pigment concentration in magenta ink is 1.9% by mass or greater but 3.6% by mass or less. The pigment concentration in light magenta ink is 0.4% by mass or greater but 1.4% by mass or less. The light ink contains water, organic solvent, and resin. The organic solvent contains amide compound represented by General formula (1). In General formula (1), R1, R2, and R3 each represent a hydrocarbon group containing from 1 through 8 carbon atoms.
    Type: Grant
    Filed: September 23, 2021
    Date of Patent: December 26, 2023
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuusuke Koizuka, Naoto Shimura, Nozomi Terai, Tatsuya Takarada
  • Publication number: 20230303877
    Abstract: An ink set contains an ink containing a coloring material, an organic solvent, and a resin, and a pre-processing fluid containing a multivalent metal salt, a resin having a glass transition temperature (Tg) of 0 degrees C. or lower, a silicone-based surfactant, and two or more types of organic solvents each having a boiling point of 220 degrees C. or lower.
    Type: Application
    Filed: October 25, 2021
    Publication date: September 28, 2023
    Applicant: Ricoh Company, Ltd.
    Inventors: Naoto Shimura, Yuusuke Koizuka, Nozomi Terai, Tatsuya Takarada
  • Publication number: 20230174811
    Abstract: A printing method prints an image on a leather with an ink set including a color ink and a clear ink. The printing method includes: applying the clear ink to a region of the leather where the color ink is to be applied; applying the color ink onto the clear ink applied; and applying the clear ink onto the color ink applied.
    Type: Application
    Filed: June 22, 2021
    Publication date: June 8, 2023
    Applicant: Ricoh Company, Ltd.
    Inventors: Naoto SHIMURA, Yuusuke Koizuka
  • Patent number: 11660897
    Abstract: Printed matter includes a substrate comprising a vinyl chloride resin and a printing layer on the substrate, wherein the surface of the substrate has a static friction coefficient of from 0.04 to 0.06 and a dynamic friction coefficient of from 0.02 to 0.03 when the surface of the substrate is rubbed with standard adjacent fabrics for staining for color fastness test under a load of 200 g, wherein the surface of the printing layer has a static friction coefficient of from 0.35 to 0.50 and a dynamic friction coefficient of from 0.20 to 0.30 when the surface of the printing layer is rubbed with standard adjacent fabrics for staining for color fastness test under a load of 200 g.
    Type: Grant
    Filed: October 8, 2021
    Date of Patent: May 30, 2023
    Assignee: Ricoh Company, Ltd.
    Inventors: Tatsuya Takarada, Yuusuke Koizuka, Naoto Shimura, Nozomi Terai, Takayuki Shimizu, Mio Akima
  • Publication number: 20230012907
    Abstract: An image forming method includes a processing fluid applying step and an ink applying step. The processing fluid applying step involves applying a processing fluid containing a multivalent metal salt, a resin TA, a resin TB different from the resin TA, and a silicone-based surfactant to a non-permeating base material by an inkjet method, where the processing fluid is free of an organic solvent having a boiling point of 200° C. or higher at normal pressure. The ink applying step involves applying an ink containing a coloring material, an organic solvent, and a resin onto the processing fluid.
    Type: Application
    Filed: July 1, 2022
    Publication date: January 19, 2023
    Applicant: Ricoh Company, Ltd.
    Inventors: Tatsuya Takarada, Yuusuke Koizuka, Naoto Shimura, Nozomi Terai, Yuya Hirokawa
  • Publication number: 20220396708
    Abstract: A set of a processing fluid and an ink is provided where the ink contains a coloring material, an organic solvent, and a resin Ri and the processing fluid contains a polyvalent metal salt, a resin Rt, and a silicone-based surfactant. A maximum tensile stress of an ink film obtained by drying the ink is 2 N/mm2 or greater.
    Type: Application
    Filed: May 31, 2022
    Publication date: December 15, 2022
    Inventors: Nozomi TERAI, Yuusuke KOIZUKA, Naoto SHIMURA, Tatsuya TAKARADA
  • Patent number: 11524509
    Abstract: ink includes water, an alcohol having a boiling point of 240 degrees C. or lower, and an infrared absorbent, wherein the alcohol accounts for 5.0 percent by mass or more of the total amount of the ink and the ink is free of an alcohol having a boiling point higher than 240 degrees C.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: December 13, 2022
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuta Nakamura, Naoto Shimura
  • Publication number: 20220324241
    Abstract: A printing method includes discharging ink to a substrate, heating a non-ink-discharged side of the substrate at T1, and heating an ink-discharged side of the substrate at T2, wherein the ink contains an organic solvent A (boiling point lower than 250 degrees C.), an organic solvent B (boiling point of 250 degrees C.), and a resin, where 0 degrees C. C?T2?T1?90 degrees C. is satisfied, the proportion (organic solvent A/ink) is 30 percent by mass or less, the proportion (organic solvent B/ink) is 1 to 3 percent by mass, the proportion (resin/ink) is 5 to 15 percent by mass, the ink has a viscosity of 8.0 to 11.0 mPa-s at 25 degrees C. and 5.5 to 11.0 mPa-s at 36 degrees C., and a 2.5 ?L ink droplet discharged to the substrate shrinks to 0.1 ?L within 10.0 seconds at 25 degrees C.
    Type: Application
    Filed: March 29, 2022
    Publication date: October 13, 2022
    Inventors: Naoto SHIMURA, Yuya HIROKAWA, Yuusuke KOIZUKA, Takayuki SHIMIZU, Itsuro SASAKI, Shunsuke HORIE, Nozomi TERAI, Kenta HAGIWARA
  • Publication number: 20220298372
    Abstract: An ink used for printing on a leather includes: a coloring material, an organic solvent, and a resin; where a maximum tensile stress of an ink film formed of the ink is 2 N/mm2 or more.
    Type: Application
    Filed: July 1, 2020
    Publication date: September 22, 2022
    Applicant: Ricoh Company, Ltd.
    Inventors: Naoto Shimura, Masaki Kudo
  • Patent number: 11421124
    Abstract: An ink contains a coloring material, an organic solvent, a resin, and a compound represented by Chemical Formula 1 having a weight average molecular weight of from 390 to 610, where R1 represents a hydrocarbon group, and n represents an integer of 2 or greater.
    Type: Grant
    Filed: August 18, 2020
    Date of Patent: August 23, 2022
    Assignee: RICOH COMPANY, LTD.
    Inventors: Naoto Shimura, Yuta Nakamura, Yoshiaki Masuda
  • Publication number: 20220119664
    Abstract: Provided is an ink set including standard ink and light ink. Standard ink includes cyan, magenta, and yellow inks. Light ink includes a light cyan or light magenta ink, or both. The pigment concentration in cyan ink is 1.9% by mass or greater but 3.6% by mass or less. The pigment concentration in light cyan ink is 0.4% by mass or greater but 1.4% by mass or less. The pigment concentration in magenta ink is 1.9% by mass or greater but 3.6% by mass or less. The pigment concentration in light magenta ink is 0.4% by mass or greater but 1.4% by mass or less. The light ink contains water, organic solvent, and resin. The organic solvent contains amide compound represented by General formula (1). In General formula (1), R1, R2, and R3 each represent a hydrocarbon group containing from 1 through 8 carbon atoms.
    Type: Application
    Filed: September 23, 2021
    Publication date: April 21, 2022
    Applicant: Ricoh Company, Ltd.
    Inventors: Yuusuke Koizuka, Naoto Shimura, Nozomi Terai, Tatsuya Takarada
  • Publication number: 20220118786
    Abstract: Printed matter includes a substrate comprising a vinyl chloride resin and a printing layer on the substrate, wherein the surface of the substrate has a static friction coefficient of from 0.04 to 0.06 and a dynamic friction coefficient of from 0.02 to 0.03 when the surface of the substrate is rubbed with standard adjacent fabrics for staining for color fastness test under a load of 200 g, wherein the surface of the printing layer has a static friction coefficient of from 0.35 to 0.50 and a dynamic friction coefficient of from 0.20 to 0.30 when the surface of the printing layer is rubbed with standard adjacent fabrics for staining for color fastness test under a load of 200 g.
    Type: Application
    Filed: October 8, 2021
    Publication date: April 21, 2022
    Applicant: Ricoh Company, Ltd.
    Inventors: Tatsuya TAKARADA, Yuusuke Koizuka, Naoto Shimura, Nozomi Terai, Takayuki Shimizu, Mio Akima
  • Patent number: 11274222
    Abstract: An ink contains a coloring material, a urethane resin, diethylene glycol diethyl ether, and a siloxane compound, wherein diethylene glycol diethyl ether has a proportion of 6.0 percent or greater by mass of the total amount of the ink.
    Type: Grant
    Filed: March 17, 2020
    Date of Patent: March 15, 2022
    Assignee: Ricoh Company, LTD.
    Inventors: Yuta Nakamura, Naoto Shimura
  • Publication number: 20220024217
    Abstract: Provided is an ink set including: an ink containing a cyan pigment; an ink containing a magenta pigment; and an ink containing a yellow pigment, wherein the proportion of the cyan pigment is 0.70% by mass or greater but 1.40% by mass or less, and wherein the proportion of the magenta pigment and the proportion of the yellow pigment are both higher than the proportion of the cyan pigment.
    Type: Application
    Filed: January 21, 2020
    Publication date: January 27, 2022
    Inventors: Hiromi SAKAGUCHI, Itsuro SASAKI, Ayaka TANAKA, Naoto SHIMURA, Shunsuke HORIE, Hiroshi GOTOU, Yuta NAKAMURA
  • Patent number: 11015072
    Abstract: An ink contains water, an organic solvent, and a resin having a glass transition temperature Tg of from 0 to 70 degrees C., wherein a contact angle ?1 of the ink against a vinyl chloride resin film and a contact angle ?2 of the ink against an ink image formed with the ink satisfies the following relationship: ?1<?2.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: May 25, 2021
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuta Nakamura, Naoto Shimura
  • Publication number: 20210062026
    Abstract: An ink contains a coloring material, an organic solvent, a resin, and a compound represented by Chemical Formula 1 having a weight average molecular weight of from 390 to 610, where R1 represents a hydrocarbon group, and n represents an integer of 2 or greater.
    Type: Application
    Filed: August 18, 2020
    Publication date: March 4, 2021
    Inventors: Naoto Shimura, Yuta Nakamura, Yoshiaki Masuda
  • Patent number: 10919294
    Abstract: A liquid discharging device includes a carriage carrying a head configured to discharge a liquid onto a target, the liquid including an ink, the ink consisting water, an organic solvent, a coloring material, and a plurality of polysiloxane compounds, a driving unit configured to move the carriage and the target relatively to each other, a measuring unit configured to measure the distance between the carriage and the target, an image-capturing unit configured to capture a target image, and a setting unit configured to set a liquid discharging performance of the head based on a measurement result obtained by the measuring unit and the target image obtained by the image-capturing unit.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: February 16, 2021
    Assignee: Ricoh Company, Ltd.
    Inventors: Takuya Fujita, Hiromi Sakaguchi, Yuta Nakamura, Naoto Shimura, Yoshiaki Masuda, Tetsuto Ueda, Yoshimi Nemoto, Kenichi Taguma, Naohiro Toda, Shinya Seno, Nobuyuki Satoh
  • Publication number: 20200299531
    Abstract: An ink contains a coloring material, a urethane resin, diethylene glycol diethyl ether, and a siloxane compound, wherein diethylene glycol diethyl ether has a proportion of 6.0 percent or greater by mass of the total amount of the ink.
    Type: Application
    Filed: March 17, 2020
    Publication date: September 24, 2020
    Inventors: Yuta Nakamura, Naoto Shimura