Patents by Inventor Akira Tsuzaki

Akira Tsuzaki 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).

  • Drying hopper and powder drying method using the same
    Patent number: 5604994
    Abstract: Disclosed is a drying hopper comprising, disposed in its lower position, a cone portion having diameters gradually decreasing toward a lower end thereof, in which a high temperature gas is injected toward powder descending in the cone portion to thereby dry the powder, wherein said drying hopper comprises a cone portion 11 having a slant, circular wall, said cone portion 11 having a plurality of vertically spaced rows of nozzles 20, formed through the circular wall, disposed at predetermined intervals in a circumferential direction of the circular wall; a plurality of vertically spaced ring-like shells 21 fluidtightly attached to an external surface of the circular wall of the cone portion 11 with interstices therebetween in positions such that said plurality of rows of nozzles 20 are respectively, at gas inlets thereof, covered by said plurality of ring-like shells 21; and a plurality of gas feed pipes 22 respectively connected to said plurality of ring-like shells 21 in communicating relationship.
    Type: Grant
    Filed: February 22, 1995
    Date of Patent: February 25, 1997
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Yoshiaki Annen, Akira Tsuzaki, Isao Shizuma, Takao Uetake, Mitsunori Ichimura
  • Drying hopper for polymer powder
    Patent number: 5423133
    Abstract: Disclosed is a drying hopper comprising, disposed in its lower position, a cone portion having diameters gradually decreasing toward a lower end thereof, in which a high temperature gas is injected toward powder descending in the cone portion to thereby dry the powder, wherein said drying hopper comprises a cone portion 11 having a slant, circular wall, said cone portion 11 having a plurality of vertically spaced rows of nozzles 20, formed through the circular wall, disposed at predetermined intervals in a circumferential direction of the circular wall; a plurality of vertically spaced ring-like shells 21 fluidtightly attached to an external surface of the circular wall of the cone portion 11 with interstices therebetween in positions such that said plurality of rows of nozzles 20 are respectively, at gas inlets thereof, covered by said plurality of ring-like shells 21; and a plurality of gas feed pipes 22 respectively connected to said plurality of ring-like shells 21 in communicating relationship.
    Type: Grant
    Filed: May 14, 1993
    Date of Patent: June 13, 1995
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Yoshiaki Annen, Akira Tsuzaki, Isao Shizuma, Takao Uetake, Mitsunori Ichimura