Patents by Inventor Hirotoshi Aikawa

Hirotoshi Aikawa 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).

  • Composite sheets for wiping cloths
    Patent number: 6080466
    Abstract: The present invention overcomes drawbacks of prior composite sheets consisting of a spun-bonded nonwoven fabric and pulp fibers and provides an inexpensive composite sheet with excellent draping qualities, a nearly fabric-like touch and good usability. According to the present invention, a composite sheet made by entangling a web of thermoplastic filaments with pulp fibers under water stream is creped to increase the elongation in machine direction as high as in cross direction enough to obtain a usability equal to those of fabric wipers.
    Type: Grant
    Filed: November 12, 1997
    Date of Patent: June 27, 2000
    Assignee: Nippon Paper Industries, Co., Ltd.
    Inventors: Jiro Yoshimura, Akira Sakamoto, Hirotoshi Aikawa, Yoichi Yamazaki
  • Process for producing a coated paper
    Patent number: 5536535
    Abstract: A process for producing coated paper comprises applying an aqueous coating solution onto coating base paper and drying the coating base paper, wherein a steam provided for drying or gas composed mainly of a steam is brought into direct contact with paper sheet, heated for regeneration, and then circulation for re-use, in which owing to the improvements in the heat efficiency and drying rate in the drying step, not only the productivity is improved, but also a high-quality coated paper is stably produced with a good efficiency.
    Type: Grant
    Filed: March 8, 1995
    Date of Patent: July 16, 1996
    Assignee: Nippon Paper Industries Co., Ltd.
    Inventors: Yoichi Yamazaki, Hirotoshi Aikawa, Kazuaki Kamata, Yasunori Nanri