Patents by Inventor Tatsuhiko NISHIZAWA

Tatsuhiko NISHIZAWA 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: 9738020
    Abstract: A mold clamping mechanism includes a fixed platen and a movable platen. The fixed platen includes upper and lower, left and right through-holes through which extend tie-bars, and a cutout that extends transversely through the through-holes and divides the through-holes into mold-side holes and opposite-mold-side holes. The fixed platen is divided by the cutout into a mold-side part and an opposite-mold-side part. The mold-side part is provided with main leg parts connected to the bed.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: August 22, 2017
    Assignee: NISSEI PLASTIC INDUSTRIAL CO., LTD.
    Inventors: Atsushi Murata, Kimiaki Shioiri, Tatsuhiko Nishizawa, Isamu Yamaguchi, Kazunori Tanaka
  • Patent number: 9566732
    Abstract: A mold-clamping mechanism in which top and bottom tie bars extend between a pressure-receiving platen and a fixed platen fixed to a bed, a movable platen is movably attached to the tie bars, a toggle link extends between the movable platen and the pressure-receiving platen, the movable platen is moved toward the fixed platen by the toggle link, and a mold is clamped by the movable platen and the fixed platen. The pressure-receiving platen includes a bottom part surrounding a central cavity, and a ceiling part for joining respective top ends of left and right wall parts provided upright from both ends of the bottom part. An opening via which the cavity communicates with the outside is provided to the bottom part and the ceiling part.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: February 14, 2017
    Assignee: NISSEI PLASTIC INDUSTRIAL CO., LTD.
    Inventors: Kimiaki Shioiri, Atsushi Murata, Tatsuhiko Nishizawa, Isamu Yamaguchi
  • Patent number: 9381690
    Abstract: A movable platen support structure includes: a linear guide mechanism via which a movable platen is provided for horizontal movement; a plurality of movable-platen height adjustment mechanisms provided in corresponding relation to leg sections of the platen, each of the height adjustment mechanisms including a flat plate placed on a corresponding slider of the guide mechanism, and an adjusting bolt screwed into the corresponding leg section of the slider and abutting at its distal end against the flat plate; and a plurality of fastening mechanisms provided in corresponding relation to the leg sections, each of the fastening mechanisms including a fastening bolt for, following the height adjustment by the adjusting bolts, fastening the corresponding leg section to the corresponding slider by being passed through the leg section and the flat plate so as to be screwed into the slider.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: July 5, 2016
    Assignee: NISSEI PLASTIC INDUSTRIAL CO., LTD.
    Inventors: Tatsuhiko Nishizawa, Atsushi Murata, Isamu Yamaguchi, Kimiaki Shioiri
  • Publication number: 20160031139
    Abstract: A mold-clamping mechanism in which top and bottom tie bars extend between a pressure-receiving platen and a fixed platen fixed to a bed, a movable platen is movably attached to the tie bars, a toggle link extends between the movable platen and the pressure-receiving platen, the movable platen is moved toward the fixed platen by the toggle link, and a mold is clamped by the movable platen and the fixed platen. The pressure-receiving platen includes a bottom part surrounding a central cavity, and a ceiling part for joining respective top ends of left and right wall parts provided upright from both ends of the bottom part. An opening via which the cavity communicates with the outside is provided to the bottom part and the ceiling part.
    Type: Application
    Filed: August 3, 2015
    Publication date: February 4, 2016
    Inventors: Kimiaki SHIOIRI, Atsushi MURATA, Tatsuhiko NISHIZAWA, Isamu YAMAGUCHI
  • Publication number: 20160031138
    Abstract: A mold clamping mechanism including a fixed platen and a movable platen is disclosed. The fixed platen includes upper and lower, left and right through-holes for allowing passage of tie-bars therethrough, and a cutout for separating the through-holes into mold-side holes and opposite-mold-side holes. The fixed platen is divided by the cutout into a mold-side part and an opposite-mold-side part. The mold-side part is provided with main leg part connected to the bed.
    Type: Application
    Filed: August 3, 2015
    Publication date: February 4, 2016
    Inventors: Atsushi MURATA, Kimiaki SHIOIRI, Tatsuhiko NISHIZAWA, Isamu YAMAGUCHI, Kazunori TANAKA
  • Publication number: 20160023391
    Abstract: A movable platen support structure includes: a linear guide mechanism via which a movable platen is provided for horizontal movement; a plurality of movable-platen height adjustment mechanisms provided in corresponding relation to leg sections of the platen, each of the height adjustment mechanisms including a flat plate placed on a corresponding slider of the guide mechanism, and an adjusting bolt screwed into the corresponding leg section of the slider and abutting at its distal end against the flat plate; and a plurality of fastening mechanisms provided in corresponding relation to the leg sections, each of the fastening mechanisms including a fastening bolt for, following the height adjustment by the adjusting bolts, fastening the corresponding leg section to the corresponding slider by being passed through the leg section and the flat plate so as to be screwed into the slider.
    Type: Application
    Filed: June 29, 2015
    Publication date: January 28, 2016
    Inventors: Tatsuhiko NISHIZAWA, Atsushi MURATA, Isamu YAMAGUCHI, Kimiaki SHIOIRI