Patents by Inventor Hiroki Ohtake

Hiroki Ohtake 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).

  • Processes for preparing pulp and paper
    Patent number: 8926793
    Abstract: The purpose of the present invention is to provide technology for regenerating pulp having high quality with compact pulp regenerating equipment and less energy. In the pulp regenerating method of the present invention, pulp slurry containing 1.5 wt % or more of a solid component including waste paper pulp is separated into a long fiber fraction and a short fiber fraction by using an outward type slit screen including an opening portion having a slit width in the range of 0.1 mm to 0.3 mm. The solid component ratio of the long fiber fraction and the short fiber fraction is in the range from 10:90 to 60:40, and the difference in Canadian Standard Freeness of the long fiber fraction and the short fiber fraction is in the range of 100 ml to 300 ml.
    Type: Grant
    Filed: January 24, 2012
    Date of Patent: January 6, 2015
    Assignees: Nippon Paper Industries Co., Ltd., Aikawa Iron Works Co., Ltd.
    Inventors: Shisei Goto, Takaharu Noda, Hiroki Ohtake, Tatsumi Hosaka
  • PROCESSES FOR PREPARING PULP AND PAPER
    Publication number: 20140020856
    Abstract: The purpose of the present invention is to provide technology for regenerating pulp having high quality with compact pulp regenerating equipment and less energy. In the pulp regenerating method of the present invention, pulp slurry containing 1.5 wt % or more of a solid component including waste paper pulp is separated into a long fiber fraction and a short fiber fraction by using an outward type slit screen including an opening portion having a slit width in the range of 0.1 mm to 0.3 mm. The solid component ratio of the long fiber fraction and the short fiber fraction is in the range from 10:90 to 60:40, and the difference in Canadian Standard Freeness of the long fiber fraction and the short fiber fraction is in the range of 100 ml to 300 ml.
    Type: Application
    Filed: January 24, 2012
    Publication date: January 23, 2014
    Applicants: AIKAWA IRON WORKS CO., LTD., NIPPON PAPER INDUSTRIES CO., LTD.
    Inventors: Shisei Goto, Takaharu Noda, Hiroki Ohtake, Tatsumi Hosaka