Patents by Inventor Kouji Izawa

Kouji Izawa 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: 11879065
    Abstract: The actinic radiation curable inkjet ink of the present invention includes an actinic radiation polymerizable compound, a crystalline polyester resin, and a gelling agent selected from the group consisting of aliphatic ester-based wax, aliphatic ketone-based wax, paraffin wax and microcrystalline wax. The image forming method of the present invention includes ejecting the actinic radiation curable inkjet ink heated to 40 to 120° C. through an inkjet head to land the actinic radiation curable inkjet ink ejected, onto a surface of a recording medium or an intermediate transfer member whose surface temperature is 60° C. or less, and irradiating the actinic radiation curable inkjet ink landed with actinic radiation.
    Type: Grant
    Filed: November 21, 2019
    Date of Patent: January 23, 2024
    Assignee: KONICA MINOLTA, INC.
    Inventors: Kouji Izawa, Yasuaki Tsuji
  • Patent number: 11578223
    Abstract: An actinic radiation-curable inkjet ink according to the present invention contains an actinic radiation polymerizable compound and a linear styrene (meth)acrylic acid ester copolymer dissolved therein. The styrene (meth)acrylic acid ester copolymer has a softening point of 30 to 120° C., and a content of the styrene (meth)acrylic acid ester copolymer is 1 to 50 wt % based on a total mass of the actinic radiation-curable inkjet ink.
    Type: Grant
    Filed: December 24, 2019
    Date of Patent: February 14, 2023
    Assignee: KONICA MINOLTA, INC.
    Inventors: Yasuaki Tsuji, Kouji Izawa
  • Patent number: 11512212
    Abstract: An actinic radiation-curable inkjet ink contains an actinic radiation-polymerizable compound, surface-treated titanium oxide, and a wax. The surface-treated titanium oxide contains carbon atoms in an amount of 0.31 mass % to 2.0 mass % based on the total mass thereof.
    Type: Grant
    Filed: June 18, 2020
    Date of Patent: November 29, 2022
    Assignee: KONICA MINOLTA, INC.
    Inventors: Go Yamaguchi, Kouji Izawa
  • Publication number: 20200407578
    Abstract: An actinic radiation-curable inkjet ink contains an actinic radiation-polymerizable compound, surface-treated titanium oxide, and a wax. The surface-treated titanium oxide contains carbon atoms in an amount of 0.31 mass % to 2.0 mass % based on the total mass thereof.
    Type: Application
    Filed: June 18, 2020
    Publication date: December 31, 2020
    Inventors: Go YAMAGUCHI, Kouji IZAWA
  • Publication number: 20200231831
    Abstract: An actinic radiation-curable inkjet ink according to the present invention contains an actinic radiation polymerizable compound and a linear styrene (meth)acrylic acid ester copolymer dissolved therein. The styrene (meth)acrylic acid ester copolymer has a softening point of 30 to 120° C., and a content of the styrene (meth)acrylic acid ester copolymer is 1 to 50 wt % based on a total mass of the actinic radiation-curable inkjet ink.
    Type: Application
    Filed: December 24, 2019
    Publication date: July 23, 2020
    Inventors: Yasuaki Tsuji, Kouji Izawa
  • Publication number: 20200190343
    Abstract: The actinic radiation curable inkjet ink of the present invention includes an actinic radiation polymerizable compound, a crystalline polyester resin, and a gelling agent selected from the group consisting of aliphatic ester-based wax, aliphatic ketone-based wax, paraffin wax and microcrystalline wax. The image forming method of the present invention includes ejecting the actinic radiation curable inkjet ink heated to 40 to 120° C. through an inkjet head to land the actinic radiation curable inkjet ink ejected, onto a surface of a recording medium or an intermediate transfer member whose surface temperature is 60° C. or less, and irradiating the actinic radiation curable inkjet ink landed with actinic radiation.
    Type: Application
    Filed: November 21, 2019
    Publication date: June 18, 2020
    Inventors: Kouji Izawa, Yasuaki Tsuji
  • Patent number: 10146147
    Abstract: To provide a magenta toner for electrostatic charge image development including a crystalline polyester resin and an amorphous resin as a binder resin, which is a means for improving low temperature fixability, scattering properties, GI value, saturation, and light fastness. A magenta toner for electrostatic charge image development including an amorphous resin and a crystalline polyester resin as a binder resin, wherein predetermined quinacridone-based pigment, metal element-containing monoazo pigment, and naphthol AS-based pigment are included as a coloring agent, and the combined content of the quinacridone-based pigment and the metal element-containing monoazo pigment is 50-90% by mass of the total coloring agent.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: December 4, 2018
    Assignee: Konica Minolta, Inc.
    Inventors: Takanari Kayamori, Masaharu Matsubara, Naoya Tonegawa, Kouji Izawa, Atsushi Iioka
  • Publication number: 20180284631
    Abstract: To provide a magenta toner for electrostatic charge image development including a crystalline polyester resin and an amorphous resin as a binder resin, which is a means for improving low temperature fixability, scattering properties, GI value, saturation, and light fastness. A magenta toner for electrostatic charge image development including an amorphous resin and a crystalline polyester resin as a binder resin, wherein predetermined quinacridone-based pigment, metal element-containing monoazo pigment, and naphthol AS-based pigment are included as a coloring agent, and the combined content of the quinacridone-based pigment and the metal element-containing monoazo pigment is 50-90% by mass of the total coloring agent.
    Type: Application
    Filed: March 23, 2018
    Publication date: October 4, 2018
    Inventors: Takanari KAYAMORI, Masaharu MATSUBARA, Naoya TONEGAWA, Kouji IZAWA, Atsushi IIOKA
  • Patent number: 10061219
    Abstract: An electrostatic charge image developing white toner according to the present invention includes toner base particles including rutile type titanium oxide particles as colorant and a binder resin. The rutile type titanium oxide particles are composed of two groups Ga and Gb of rutile type titanium oxide particles have different volume particle size distribution. A volume particle size distribution curve of the rutile type titanium oxide particles represents diameter on a horizontal axis and volume ratio on a vertical axis and has two main peaks. Diameters Da and Db of peak top positions of the two main peaks are respectively within a range of 100 to 500 nm, and satisfy following Relational expressions: (Relational expression 1):??25 nm?Db?Da?200 nm (Relational expression 2):??(mass of Ga):(mass of Gb)=5:95 to 30:70.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: August 28, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Takanari Kayamori, Masaharu Matsubara, Naoya Tonegawa, Kouji Izawa, Atsushi Iioka
  • Publication number: 20180088481
    Abstract: An electrostatic charge image developing white toner according to the present invention includes toner base particles including rutile type titanium oxide particles as colorant and a binder resin. The rutile type titanium oxide particles are composed of two groups Ga and Gb of rutile type titanium oxide particles have different volume particle size distribution. A volume particle size distribution curve of the rutile type titanium oxide particles represents diameter on a horizontal axis and volume ratio on a vertical axis and has two main peaks.
    Type: Application
    Filed: September 20, 2017
    Publication date: March 29, 2018
    Inventors: Takanari KAYAMORI, Masaharu MATSUBARA, Naoya TONEGAWA, Kouji IZAWA, Atsushi IIOKA
  • Patent number: 4538183
    Abstract: In an image editing apparatus adapted to cut a plurality of regions of any size from a plurality of documents and prepare a new document by sticking the cut regions on a sheet. The cut regions are designated by a light pen of an instruction input section for each document displayed on a CRT display. The coordinate information of the cut regions is stored in a RAM in a sticking region computer and the image information is stored in a first buffer (RAM). A ROM in the sticking region computer stores information relating to a plurality of basic patterns representing the manner of sticking a plurality of cut regions. The coordinates of a plurality of sticking regions are calculated for each basic pattern on the basis of the coordinate data of the cut regions. An image processor causes the image data of the cut regions which are stored in the first buffer to be transferred to memory area of a second buffer (RAM) which is designated by the coordinates of the corresponding sticking regions.
    Type: Grant
    Filed: December 28, 1982
    Date of Patent: August 27, 1985
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Masayuki Kanno, Hisao Tezuka, Kouji Izawa, Tadanobu Kamiyama
  • Patent number: 4386432
    Abstract: This disclosure concerns currency identification systems for examining an authenticity characteristic of a detected currency and comparing it to an authenticity characteristic of a genuine currency to determine if the detected currency is genuine.
    Type: Grant
    Filed: October 17, 1980
    Date of Patent: May 31, 1983
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Yashushi Nakamura, Ko Ohtombe, Kouji Izawa