Patents by Inventor Yoshifumi Iimori

Yoshifumi Iimori 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).

  • Ink jet recording paper and the production thereof
    Patent number: 6410123
    Abstract: An ink jet recording paper, which is excellent in ink absorbency and color-developing properties and has dull-tone glossiness, comprising an ink-receiving layer and at least two colloidal silica layers applied successively onto a support, each of said colloidal silica layers comprising chain colloidal silica as a main ingredient, wherein at least the colloidal silica layer contacting the ink-receiving layer contains no binder and has a coverage of about 1 to 3 g/m2, and the coverage of other colloidal silica layer is about 1 to 6 g/m2.
    Type: Grant
    Filed: December 27, 1999
    Date of Patent: June 25, 2002
    Assignee: Nippon Paper Industries Co. Ltd.
    Inventors: Teiichi Otani, Atsushi Ono, Yoshifumi Iimori, Akinobu Chatani, Noboru Kondo, Takashi Ueno, Yoshihiro Kuroyama
  • Permanent paper
    Patent number: 5562974
    Abstract: A permanent paper is disclosed which employs as a stock pulp slurry containing at least one kind of filler and aluminum sulfate, a hydrophobic modified rosin emulsion sizing agent and a water-soluble alkaline salt, wherein the pH where said filler is dispersed in water to form 10% of a dispersion is 4-8, the pH of said pulp slurry is controlled within 6.5-7.5 and an alkaline salt of an acid having a pKa of 5-14 at a 25.degree. C. aqueous solution is coated onto said paper and the pH of the coated paper extract in cold water is 7.5-9.0.
    Type: Grant
    Filed: July 7, 1993
    Date of Patent: October 8, 1996
    Assignee: Nippon Paper Industries Co., Ltd.
    Inventors: Yoshihiro Kuroyama, Yoshiyuki Inoue, Susumu Ishikawa, Yoshifumi Iimori
  • Ink jet recording paper
    Patent number: 5522968
    Abstract: Fine paper type ink jet recording paper which has a pH 6.0-8.0 in cold water extraction to provide printed letters of high quality, is produced by using a basal paper comprising wood cellulose and a filler which has a pH 4.0-8.0 as a 10 wt % dispersion and by applying an alkali metal salt at a coverage rate of 0.01-5.0 g/m.sup.2 to at least one surface of said basal paper.
    Type: Grant
    Filed: June 17, 1992
    Date of Patent: June 4, 1996
    Assignee: Nippon Paper Industries Co., Ltd.
    Inventors: Yoshihiro Kuroyama, Yumiko Satoh, Yoshifumi Iimori
  • Inkjet recording paper and a manufacturing process thereof
    Patent number: 5397619
    Abstract: An ink jet recording paper characterized in that it comprises a base paper wherein at least one surface has a recording layer, this recording layer containing at least 40 weight % of a pigment and no more than 60 weight % of a binder, the surface roughness by ten point height on the recording layer surface being no more than 5 .mu.m, and the air permeability of the recording paper being no more than 1,000 seconds and a manufacturing process thereof are disclosed.
    Type: Grant
    Filed: August 6, 1993
    Date of Patent: March 14, 1995
    Assignee: Nippon Paper Industries Co., Ltd.
    Inventors: Yoshihiro Kuroyama, Teruhisa Shimada, Hirokazu Hirata, Yoshifumi Iimori
  • Ink jet recording paper
    Patent number: 5281467
    Abstract: An ink jet recording paper having a support provided on at least one surface with a pigment-containing coating in accordance with a cast coating method, with said pigment comprising at least 50 weight percent of a calcium carbonate-compounded silica, whereby achieving excellent ink absorption, smoothness, gloss and water resistance together with an excellent dot density, sharpness and roundness to ensure recording of high quality, high contrast full color images.
    Type: Grant
    Filed: August 26, 1992
    Date of Patent: January 25, 1994
    Assignee: Sanyo-Kokusaku Pulp Co., Ltd.
    Inventors: Teruhisa Shimada, Hirokazu Hirata, Yoshifumi Iimori