Patents by Inventor Hisao Iwamotoi

Hisao Iwamotoi 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: 8465817
    Abstract: A polyester container furnished with a flange part having mechanical strength, transparency, and heat resistance through orientational crystallization, which polyester container exhibits low-temperature heat sealability, is provided by forming a projecting portion at an upper surface of the crystallized flange part, the projecting portion at at least a heat-sealing-face constituting region rendered amorphous or of low crystallinity. Further, in order to suppress the unevenness of the strength of sealing with a cover member and stably attain the high sealability, the projecting portion is deformed at the time of heat sealing with the cover member so as to form a resin piece protruding toward the interior of the container while being substantially appressed against the upper surface of an opening rim part. The formed resin piece couples with a sealant layer of the cover member.
    Type: Grant
    Filed: November 4, 2004
    Date of Patent: June 18, 2013
    Assignee: Toyo Seikan Kaisha, Ltd.
    Inventors: Yasushi Hatano, Tsutomu Iwasaki, Masahito Kogure, Hideo Kawasaki, Hisao Iwamotoi