Patents by Inventor Yoshitsugu Takei

Yoshitsugu Takei 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: 5392725
    Abstract: A sewing machine needle is manufactured without producing any burrs on a blade by subjecting the whole blade to die pressing. A needle blank (10) is subject to double swaging, resulting in it being formed with blade sections (14, 16). Then, the needle blank is formed with an elongated portion (22) for subsequently forming a clearance-above-eye above a needle eye. The die pressing permits both side surfaces of a long groove (28) to be spread so as to be spaced from each other at a predetermined angle, and permits the clearance-above-eye (40) and eye portion (33) to be formed. The sewing machine needle thus formed exhibits sufficient rigidity and provides an increased space between the blade and a sewing thread, resulting in a sewing operation being carried out stably and at an increased speed.
    Type: Grant
    Filed: January 7, 1993
    Date of Patent: February 28, 1995
    Assignee: Organ Needle Co., Ltd.
    Inventors: Yoshitsugu Takei, Tsutomu Kojima