Patents by Inventor Hiroshi Sakanashi

Hiroshi Sakanashi 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).

  • Method of producing thermoplastic polymer film
    Patent number: 5030393
    Abstract: A method for producing a thermoplastic polymer film is disclosed. A melted thermoplastic polymer is extruded from a die onto a rotary cooling body, static electricity is impressed on the rotary cooling, body through a main electrode provided close and parallel to the cooling body and the film is solidified by cooling which method is characterized by providing at least one ungrounded auxiliary electrode composed of a conductive material unconnected to the main electrode and disposed at least on one side of the main electrode parallel to the rotary cooling body.
    Type: Grant
    Filed: September 8, 1989
    Date of Patent: July 9, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shigeki Endo, Hiroshi Sakanashi, Hideo Egami