Patents by Inventor NAO ISHIJIMA

NAO ISHIJIMA 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).

  • 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: 20240123738
    Abstract: Provided is an ink jet recording method which can record an image excellent in abrasion resistance and in which an ink after storage is excellent in filter passability. The ink jet recording method includes ejecting an aqueous ink to a recording medium to record an image with an ink jet recording apparatus including: the aqueous ink; an ink storage bag configured to store the aqueous ink; and a recording head of an ink jet system configured to eject the aqueous ink. The recording head includes, in an inside thereof, a filter configured to pass the aqueous ink therethrough. The aqueous ink contains a pigment, a wax, a dispersant for dispersing the wax and a resin particle.
    Type: Application
    Filed: October 13, 2023
    Publication date: April 18, 2024
    Inventors: YUKO NEGISHI, EIICHI NAKATA, NAO ISHIJIMA