Patents by Inventor Etsuro Tutsumi

Etsuro Tutsumi 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 drawn and ironed processing of resin coated metal sheet and resin coated drawn and ironed can produced thereby
    Patent number: 7878040
    Abstract: A method of drawn and ironed processing of a resin coated metal sheet, in which in the drawn and ironed processing of resin coated metal sheet, there can be obtained a can body of satisfactorily small wall thickness and at an opening edge part of the can body, the coating resin is free from any defect; and a resin coating drawn and ironed processed can produced thereby. There is provided a method of drawn and ironed processing of a resin coated metal sheet, comprising performing drawn and ironed processing of a resin coated metal sheet composed of a metal sheet having at least one major surface thereof coated with an organic resin with the use of a punch and a die into a can body, characterized in that ironing is conducted with the use of a punch having a small-diameter portion at its rear end so that the ratio of ironing at an opening edge part of the can body after shaping falls within the range of 0 to 15%.
    Type: Grant
    Filed: June 27, 2005
    Date of Patent: February 1, 2011
    Assignees: Toyo Kohan Co., Ltd., Toyo Seikan Co., Ltd.
    Inventors: Shinichi Taya, Masahiro Kai, Junichi Tanabe, Etsuro Tutsumi, Norihito Saiki
  • Method of drawn and ironed processing of resin coated metal sheet and resin coated drawn and ironed can produced thereby
    Publication number: 20090013751
    Abstract: A method of drawn and ironed processing of a resin coated metal sheet, in which in the drawn and ironed processing of resin coated metal sheet, there can be obtained a can body of satisfactorily small wall thickness and at an opening edge part of the can body, the coating resin is free from any defect; and a resin coating drawn and ironed processed can produced thereby. There is provided a method of drawn and ironed processing of a resin coated metal sheet, comprising performing drawn and ironed processing of a resin coated metal sheet composed of a metal sheet having at least one major surface thereof coated with an organic resin with the use of a punch and a die into a can body, characterized in that ironing is conducted with the use of a punch having a small-diameter portion at its rear end so that the ratio of ironing at an opening edge part of the can body after shaping falls within the range of 0 to 15%.
    Type: Application
    Filed: June 27, 2005
    Publication date: January 15, 2009
    Inventors: Shinichi Taya, Masahiro Kai, Junichi Tanabe, Etsuro Tutsumi, Norihito Saiki