Patents by Inventor Ryo Tsujii

Ryo Tsujii 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: 12005726
    Abstract: The ink jet recording method includes ejecting an aqueous ink from a recording head to apply the aqueous ink to a recording medium, to thereby record an image. The ink jet recording method includes: ejecting the aqueous ink heated to a temperature TH (° C.) from the recording head to apply the aqueous ink to the recording medium; and heating the recording medium having the aqueous ink applied thereto to a temperature TF (° C.), the aqueous ink containing a pigment and a polyester resin particle, a glass transition temperature TG (° C.) of the polyester resin particle, the temperature TH (° C.) and the temperature TF (° C.) satisfying relationships of the following expressions (1) to (3). TG(° C.)>TH(° C.)??(1) TF(° C.)?TH(° C.)+10° C.??(2) TF(° C.)?TG(° C.)?10° C.
    Type: Grant
    Filed: September 6, 2022
    Date of Patent: June 11, 2024
    Assignee: Canon Kabushiki Kaisha
    Inventors: Eiichi Nakata, Eriko Yoshino, Ryo Tsujii, Yoshitaka Torisaka, Masanori Yoshida
  • Publication number: 20240182731
    Abstract: There is provided an ink jet recording method for recording an image on a recording medium with an aqueous ink and an aqueous reaction liquid containing a reactant that reacts with the aqueous ink. The aqueous ink contains a coloring material that is dispersed by the action of an anionic group. The aqueous reaction liquid contains a water-soluble cationic resin having a structure of a quaternary ammonium salt, and a polyvalent metal salt. The mass ratio of the amount of cationic resin (% by mass) contained to the amount of polyvalent metal salt (% by mass) contained in the aqueous reaction liquid is 0.08 times or more to 0.80 times or less. The amount of water absorbed by the recording medium from the start of contact to 30 msec1/2 in the Bristow method is 10 mL/m2 or less.
    Type: Application
    Filed: November 20, 2023
    Publication date: June 6, 2024
    Inventors: RYO TSUJII, HIDEKI YAMAKAMI, SATOSHI TAKEBAYASHI
  • Publication number: 20240182741
    Abstract: There is provided an ink jet recording method for recording an image on a recording medium with an aqueous ink and an aqueous reaction liquid containing a reactant that reacts with the aqueous ink. The aqueous ink contains a pigment dispersed by the action of a carboxylic acid group, a resin particle and a water-soluble organic solvent. The rate of increase in the particle size of the pigment dispersed by the action of the carboxylic acid group when the pigment comes into contact with the aqueous reaction liquid is 8.0 times or more. The amount of water absorbed by the recording medium from the start of contact to 30 msec1/2 in a Bristow method is 10 mL/m2 or less.
    Type: Application
    Filed: November 20, 2023
    Publication date: June 6, 2024
    Inventors: SATOSHI TAKEBAYASHI, YOSHITAKA TORISAKA, RYO TSUJII, NAO ISHIJIMA, YUKO NEGISHI, EIICHI NAKATA
  • Publication number: 20230077739
    Abstract: The ink jet recording method includes ejecting an aqueous ink from a recording head to apply the aqueous ink to a recording medium, to thereby record an image. The ink jet recording method includes: ejecting the aqueous ink heated to a temperature TH (° C.) from the recording head to apply the aqueous ink to the recording medium; and heating the recording medium having the aqueous ink applied thereto to a temperature TF (° C.), the aqueous ink containing a pigment and a polyester resin particle, a glass transition temperature TG (° C.) of the polyester resin particle, the temperature TH (° C.) and the temperature TF (° C.) satisfying relationships of the following expressions (1) to (3). TG(° C.)>TH(° C.) ??(1) TF(° C.)?TH(° C.)+10° C. ??(2) TF(° C.)?TG(° C.)?10° C.
    Type: Application
    Filed: September 6, 2022
    Publication date: March 16, 2023
    Inventors: Eiichi Nakata, Eriko Yoshino, Ryo Tsujii, Yoshitaka Torisaka, Masanori Yoshida