Patents by Inventor Chizuru Wakai

Chizuru Wakai 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: 7828933
    Abstract: A coated sheet for web offset printing which includes a pigment coating layer containing a pigment and an adhesive formed on a base paper, and a surface layer containing a surface-sizing agent and a plastic pigment formed on the pigment coating layer.
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: November 9, 2010
    Assignee: Nippon Paper Industries Co., Ltd.
    Inventors: Koji Okomori, Chizuru Wakai, Hirokazu Morii
  • Patent number: 7829182
    Abstract: A coated printing paper offering high gloss, no mottled impression, sufficiently practical levels of printability in terms of ink-drying property and surface peel strength, and good productivity achieved by elimination of deposits on the calender rolls, wherein the coated printing paper comprises a base paper and a coating layer comprising pigment and adhesive formed on the base paper, and wherein a surface layer comprising 100 weight-parts of thermoplastic copolymer with a glass-transition temperature of 80° C. or above and 3 to 100 weight-parts of surface sizing agent of styrene-acrylic, olefin or styrene-maleic acid copolymer type is formed on the coating layer.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: November 9, 2010
    Assignee: Nippon Paper Industries, Co., Ltd.
    Inventors: Chizuru Wakai, Hidehiko Kai, Seiki Yoneshige, Hirokazu Morii
  • Publication number: 20060005933
    Abstract: A coated sheet for web offset printing comprising a base paper with a pigment coating layer formed on it, and a surface layer—preferably containing surface-sizing agents and plastic pigments—formed on the pigment coating layer; wherein the air permeability of the sheet before printing is less than 80,000 seconds and the air permeability in a non-image area after printing decreases by 8,000 seconds or more from the level before printing. The coated sheet for web offset printing obtained by the present invention suppresses wrinkling during web offset printing or in the subsequent drying process and also offers excellent blister resistance and other properties.
    Type: Application
    Filed: September 27, 2002
    Publication date: January 12, 2006
    Applicant: Nippon Paper Industries Co., Ltd.
    Inventors: Koji Okomori, Chizuru Wakai, Hirokazu Morii
  • Patent number: 6929845
    Abstract: A coated paper for gravure printing that offers good gravure printability resulting from reduced missing dots while at the same time achieving high sheet gloss, wherein the paper comprises a base paper and a coating layer containing a pigment and an adhesive. This paper also contains a compound having an effect of inhibiting the binding between pulp fibers, wherein the compound, when added to 0.3 weight-part per 100 parts of bone-dry pulp, will reduce the tensile strength of the paper by five % to 40% (as measured in accordance with JIS P 8133).
    Type: Grant
    Filed: September 27, 2001
    Date of Patent: August 16, 2005
    Assignee: Nippon Paper Industries Co., Ltd.
    Inventors: Hidehiko Kai, Koji Okomori, Chizuru Wakai, Hirokazu Morii, Hideki Fujiwara
  • Publication number: 20050170110
    Abstract: A coated printing paper offering high gloss, no mottled impression, sufficiently practical levels of printability in terms of ink-drying property and surface peel strength, and good productivity achieved by elimination of deposits on the calender rolls, wherein the coated printing paper comprises a base paper and a coating layer comprising pigment and adhesive formed on the base paper, and wherein a surface layer comprising 100 weight-parts of thermoplastic copolymer with a glass-transition temperature of 80° C. or above and 3 to 100 weight-parts of surface sizing agent of styrene-acrylic, olefin or styrene-maleic acid copolymer type is formed on the coating layer.
    Type: Application
    Filed: March 29, 2002
    Publication date: August 4, 2005
    Inventors: Chizuru Wakai, Hidehiko Kai, Seiki Yoneshige, Hirokazu Morii
  • Publication number: 20040048087
    Abstract: A coated paper for gravure printing that offers good gravure printability resulting from reduced missing dots while at the same time achieving high sheet gloss, wherein the paper comprises a base paper and a coating layer containing a pigment and an adhesive. This paper also contains a compound having an effect of inhibiting the binding between pulp fibers, wherein the compound, when added to 0.3 weight-part per 100 parts of bone-dry pulp, will reduce the tensile strength of the paper by five % to 40% (as measured in accordance with JIS P 8133).
    Type: Application
    Filed: September 22, 2003
    Publication date: March 11, 2004
    Inventors: Hidehiko Kai, Koji Okomori, Chizuru Wakai, Hirokazu Morii, Hideki Fujiwara