Patents by Inventor Masayuki Fukuoka

Masayuki Fukuoka 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: 10457079
    Abstract: An image forming method includes applying an ink for the first time to a recording medium to form an image and rolling up the recording medium in a roll form, wherein the recording medium is continuous paper, the ink includes an organic solvent and a coloring material, and the image recorded matter has a tackiness power of from 80 to 110 nN.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: October 29, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Kaori Toyama, Yuuki Yokohama, Hiromi Sakaguchi, Hideaki Nishimura, Masayuki Fukuoka, Shuusuke Someno
  • Patent number: 10370548
    Abstract: A copolymer including a structural unit represented by General Formula (1) below, and a structural unit represented by General Formula (2) below, where, in General Formula (1), R1 is a hydrogen atom or a methyl group, L1 is an alkylene group having 2 or greater carbon atoms but 5 or less carbon atoms, and X is a hydrogen atom or a cation, where, in General Formula (2), R2 is a hydrogen atom or a methyl group and L2 is an alkylene group having 2 or greater carbon atoms but 18 or less carbon atoms.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: August 6, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Shigeyuki Harada, Akihiko Matsuyama, Yoshiki Yanagawa, Masayuki Fukuoka, Takuya Yamazaki, Kazukiyo Nagai, Yuusuke Koizuka, Tomoyuki Shimada, Akiyoshi Sabu
  • Publication number: 20190136080
    Abstract: An ink set includes an ink A including water, a first organic solvent, and a first pigment and an ink B including water, a second organic solvent, a second pigment, and a urethane resin particle. The first organic solvent includes at least one of N,N-dimethyl-?-buthoxy propionamide, N,N-dimethyl-?-methoxy propionamide, and 3-ethyl-3-hydroxymethyl oxetane and has a mixing solubility parameter A of 10.00 to less than 13.00 and the second organic solvent has a mixing solubility parameter B of 13.00 to 16.00.
    Type: Application
    Filed: January 7, 2019
    Publication date: May 9, 2019
    Inventors: Yuuki Yokohama, Hiroshi Gotou, Kaori Toyama, Masayuki Fukuoka
  • Patent number: 10280321
    Abstract: An ink includes a pigment, a wax, a water soluble solvent including a solvent having an SP value of from 9.0 to 11.0, and water, wherein the mass ratio of the content of the wax in the ink to the content of the solvent having an SP value of from 9.0 to 11.0 is in a range of from 1.0:2.5 to 1.0:25.0.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: May 7, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Akihiko Matsuyama, Hiroshi Gotou, Michihiko Namba, Hidetoshi Fujii, Amika Sagara, Kazukiyo Nagai, Tomoyuki Shimada, Shigeyuki Harada, Yoshiki Yanagawa, Akiyoshi Sabu, Yuusuke Koizuka, Masayuki Fukuoka, Takuya Yamazaki
  • Publication number: 20190111715
    Abstract: An image forming method includes applying an ink for the first time to a recording medium to form an image and rolling up the recording medium in a roll form, wherein the recording medium is continuous paper, the ink includes an organic solvent and a coloring material, and the image recorded matter has a tackiness power of from 80 to 110 nN.
    Type: Application
    Filed: December 4, 2018
    Publication date: April 18, 2019
    Inventors: Kaori TOYAMA, Yuuki Yokohama, Hiromi Sakaguchi, Hideaki Nishimura, Masayuki Fukuoka, Shuusuke Someno
  • Patent number: 10233345
    Abstract: An ink set includes an ink A including water, a first organic solvent, and a first pigment and an ink B including water, a second organic solvent, a second pigment, and a urethane resin particle. The first organic solvent includes at least one of N,N-dimethyl-?-buthoxy propionamide, N,N-dimethyl-?-methoxy propionamide, and 3-ethyl-3-hydroxymethyl oxetane and has a mixing solubility parameter A of 10.00 to less than 13.00 and the second organic solvent has a mixing solubility parameter B of 13.00 to 16.00.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: March 19, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuuki Yokohama, Hiroshi Gotou, Kaori Toyama, Masayuki Fukuoka
  • Patent number: 10195885
    Abstract: An image forming method includes applying an ink for the first time to a recording medium to form an image and rolling up the recording medium in a roll form, wherein the recording medium is continuous paper, the ink includes water, an organic solvent, and a coloring material, and the image has a tackiness power of from 80 to 110 nN.
    Type: Grant
    Filed: June 14, 2017
    Date of Patent: February 5, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Kaori Toyama, Yuuki Yokohama, Hiromi Sakaguchi, Hideaki Nishimura, Masayuki Fukuoka, Shuusuke Someno
  • Publication number: 20180244935
    Abstract: An ink includes an organic solvent and polyethylene wax, wherein the polyethylene wax has a penetration of 1.2 or less as measured according to JIS K2235 format.
    Type: Application
    Filed: November 27, 2017
    Publication date: August 30, 2018
    Inventors: Hiromi SAKAGUCHI, Yuuki YOKOHAMA, Hideaki NISHIMURA, Kaori TOYAMA, Hiroshi GOTOU, Masayuki FUKUOKA, Sayuri KOJIMA, Takashi TAMAI, Shun SAITO
  • Patent number: 10035869
    Abstract: To provide a copolymer including: a structural unit represented by the following General Formula (1) where X represents a hydrogen atom or a cation; a structural unit expressed by the following Structural Formula (1); and a structural unit represented by the following General Formula (2) where R is a hydrogen atom or a methyl group, L is a single bond or —(CH2)n—O—CO— where n is an integer in a range of from 2 through 18, and a carbonyl carbon atom in the —(CH2)n—O—CO— is bound to naphthyl.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: July 31, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Shigeyuki Harada, Yoshiki Yanagawa, Keita Katoh, Masayuki Fukuoka, Kazukiyo Nagai, Yuusuke Koizuka, Tomoyuki Shimada, Akiyoshi Sabu
  • Patent number: 9988543
    Abstract: Provided is an ink containing a copper phthalocyanine pigment, wherein an absorbance ratio (Y/X) of a local minimum absorbance Y of the ink in a wavelength range of from 665 nm through 675 nm to a local maximum absorbance X of the ink in a wavelength range of from 610 nm through 620 nm is 0.660 or greater but 0.740 or less.
    Type: Grant
    Filed: June 6, 2016
    Date of Patent: June 5, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Akihiko Matsuyama, Shigeyuki Harada, Yoshiki Yanagawa, Masayuki Fukuoka, Takuya Yamazaki, Kazukiyo Nagai, Tomoyuki Shimada, Akiyoshi Sabu, Yuusuke Koizuka
  • Publication number: 20180002553
    Abstract: A copolymer including a structural unit represented by General Formula (1) below, and a structural unit represented by General Formula (2) below, where, in General Formula (1), R1 is a hydrogen atom or a methyl group, L1 is an alkylene group having 2 or greater carbon atoms but 5 or less carbon atoms, and X is a hydrogen atom or a cation, where, in General Formula (2), R2 is a hydrogen atom or a methyl group and L2 is an alkylene group having 2 or greater carbon atoms but 18 or less carbon atoms.
    Type: Application
    Filed: September 14, 2017
    Publication date: January 4, 2018
    Inventors: Shigeyuki HARADA, Akihiko MATSUYAMA, Yoshiki YANAGAWA, Masayuki FUKUOKA, Takuya YAMAZAKI, Kazukiyo NAGAI, Yuusuke KOIZUKA, Tomoyuki SHIMADA, Akiyoshi SABU
  • Publication number: 20180002469
    Abstract: To provide a copolymer including: a structural unit represented by the following General Formula (1) where X represents a hydrogen atom or a cation; a structural unit expressed by the following Structural Formula (1); and a structural unit represented by the following General Formula (2) where R is a hydrogen atom or a methyl group, L is a single bond or —(CH2)n—O—CO— where n is an integer in a range of from 2 through 18, and a carbonyl carbon atom in the —(CH2)n—O—CO— is bound to naphthyl.
    Type: Application
    Filed: January 28, 2016
    Publication date: January 4, 2018
    Inventors: Shigeyuki HARADA, Yoshiki YANAGAWA, Keita KATOH, Masayuki FUKUOKA, Kazukiyo NAGAI, Yuusuke KOIZUKA, Tomoyuki SHIMADA, Akiyoshi SABU
  • Patent number: 9850335
    Abstract: A copolymer includes a structure unit represented by Chemical Formula I; and a structure unit represented by Chemical Formula II, where R1 and R2 each, independently represent hydrogen atoms or methyl groups, X represents a hydrogen atom or a cation, and L represents an alkylene group having 2 to 18 carbon atoms.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: December 26, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Shigeyuki Harada, Keita Katoh, Masayuki Fukuoka, Kazukiyo Nagai, Yuusuke Koizuka, Tomoyuki Shimada, Yoshiki Yanagawa, Akiyoshi Sabu, Akihiko Matsuyama, Takuya Yamazaki
  • Patent number: 9850391
    Abstract: Provided is an ink including: copolymer including at least one of structural unit of formula (1) and structural unit of formula (2); pigment having acid value of ?15 ?mol/g and represented by formula (3); water; and water-soluble organic solvent. In formula (1), R1 represents hydrogen or methyl group. L1 represents alkylene group including 2-18 carbon atoms. In formula (2), R1 represents hydrogen or methyl group. L2 represents single bond or —(CH2)n-O— of which oxygen is bound with biphenyl. n represents integer of 2 through 18. In formula (3), R1 represents any one of hydrogen, halogen, alkyl group including 1-4 carbon atoms, alkoxy group including 1-4 carbon atoms, hydroxy, nitro, and alkyl substituted or unsubstituted amino group including 1-4 carbon atoms. n represents integer of 1 through 5. When n is a plural number, R1 may be identical or different. R2, R3, and R4 represent alkyl group including 1-4 carbon atoms.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: December 26, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Masayuki Fukuoka, Shigeyuki Harada, Yoshiki Yanagawa, Takuya Yamazaki, Kazukiyo Nagai, Yuusuke Koizuka, Tomoyuki Shimada, Akiyoshi Sabu, Akihiko Matsuyama
  • Publication number: 20170361632
    Abstract: An image forming method includes applying an ink for the first time to a recording medium to form an image and rolling up the recording medium in a roll form, wherein the recording medium is continuous paper, the ink includes water, an organic solvent, and a coloring material, and the image has a tackiness power of from 80 to 110 nN.
    Type: Application
    Filed: June 14, 2017
    Publication date: December 21, 2017
    Inventors: Kaori TOYAMA, Yuuki YOKOHAMA, Hiromi SAKAGUCHI, Hideaki NISHIMURA, Masayuki FUKUOKA, Shuusuke SOMENO
  • Patent number: 9777091
    Abstract: A copolymer includes the structure unit represented by the following Chemical formula 1 and the structure unit represented by the following Chemical formula 2, where R1 and R2 each, independently represent hydrogen atoms or methyl groups, and n represents a value in the range of from 1 to 90, where R3 represents a hydrogen atom or a methyl group and L represents an alkylene group having 2 to 18 carbon atoms.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: October 3, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Masayuki Fukuoka, Shigeyuki Harada, Yoshiki Yanagawa, Keita Katoh, Kazukiyo Nagai, Yuusuke Koizuka, Tomoyuki Shimada, Akiyoshi Sabu, Takuya Yamazaki, Akihiko Matsuyama
  • Publication number: 20170267888
    Abstract: An ink set includes an ink A including water, a first organic solvent, and a first pigment and an ink B including water, a second organic solvent, a second pigment, and a urethane resin particle. The first organic solvent includes at least one of N,N-dimethyl-?-buthoxy propionamide, N,N-dimethyl-?-methoxy propionamide, and 3-ethyl-3-hydroxymethyl oxetane and has a mixing solubility parameter A of 10.00 to less than 13.00 and the second organic solvent has a mixing solubility parameter B of 13.00 to 16.00.
    Type: Application
    Filed: March 2, 2017
    Publication date: September 21, 2017
    Inventors: Yuuki Yokohama, Hiroshi Gotou, Kaori Toyama, Masayuki Fukuoka
  • Publication number: 20170130081
    Abstract: Provided is an ink including water, at least one organic solvent, a coloring material, urethane-based resin particles, and acrylic-based resin particles, wherein a difference between a total HSP value of an organic solvent having the highest boiling point of the at least one organic solvent and a total HSP value of the urethane-based resin particles is 6.0 [(J/cm3)0.5] or less, and wherein a difference between a polarity HSP value of the organic solvent having the highest boiling point of the at least one organic solvent and a polarity HSP value of the urethane-based resin particles is 5.0 [(J/cm3)0.5] or less.
    Type: Application
    Filed: September 27, 2016
    Publication date: May 11, 2017
    Inventors: Kaori TOYAMA, Yuuki Yokohama, Hiromi Sakaguchi, Hideaki Nishimura, Masayuki Fukuoka, Hiroshi Gotou
  • Publication number: 20170121543
    Abstract: Provided is an ink including: an organic solvent; water; a coloring material; a wax; and resin particles, wherein the resin particles include acrylic resin particles and urethane resin particles, and wherein a ratio by mass (urethane resin particles/acrylic resin particles) of a proportion (percent by mass) of the urethane resin particles to a proportion (percent by mass) of the acrylic resin particles is 0.1 or greater but 0.7 or less. In a preferable aspect, the wax is a polyethylene wax. In another preferable aspect, the urethane resin particles are polycarbonate urethane resin particles.
    Type: Application
    Filed: September 28, 2016
    Publication date: May 4, 2017
    Inventors: Hiromi SAKAGUCHI, Hiroshi Gotou, Yuuki Yokohama, Hideaki Nishimura, Kaori Toyama, Masayuki Fukuoka
  • Patent number: 9617439
    Abstract: An ink composition contains (a) a pigment represented by chemical formula 1a or chemical formula 1b, (b) a polymer having a structure unit having a diphosphonic acid group and represented by Chemical formula 2, (c) a hydrosoluble solvent, and (d) water.
    Type: Grant
    Filed: February 18, 2015
    Date of Patent: April 11, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Akihiko Matsuyama, Shigeyuki Harada, Keita Katoh, Masayuki Fukuoka, Mitsuru Naruse, Kazukiyo Nagai, Yuusuke Koizuka, Masayasu Nonogaki