Patents by Inventor Renzo Minagawa

Renzo Minagawa 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 packing film and packing bag made of the same
    Patent number: 4360550
    Abstract: A composite packing film is provided which comprises a base film having relatively small longitudinal and transverse elongations of not more than 10%, a layer of unidirectionally elongated film elongated in one direction and laminated on one face of said base film through an adhesive, a layer of an elongated film elongated at least in the direction substantially perpendicular to said first direction and laminated on the other face of said base film through an adhesive, and a sealant layer having a melting point lower than those of said elongated films and laminated on either one of the external faces of said elongated films, the difference between the resistance against end tearing of said unidirectionally elongated film and the resistance against end tearing of said latter-mentioned elongated film being not less than 15 kg. A packing bag made of the composite film is also provided.
    Type: Grant
    Filed: September 5, 1980
    Date of Patent: November 23, 1982
    Assignee: Toyo Kagaku Kabushiki Kaisha
    Inventors: Hiroshi Asakura, Ippei Chimura, Teruaki Taguchi, Renzo Minagawa