Title:
SEWING MACHINE NEEDLE AND METHOD OF MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/1992/020851
Kind Code:
A1
Abstract:
A sewing machine needle is manufactured by die-pressing the whole needle trunk portion without causing burrs on the needle trunk. A needle material (10) has its needle trunk (14, 16) drawn into two stages, and further, a thin portion (22) previously formed to form a scraped-out portion above a needle hole. By die-pressing, the opposite side portions of a needle groove (28) are extended to a predetermined angle, and the scraped-out portion (40) of a desirable shape and a needle hole portion (33) are formed. The needle thus obtained has sufficiently high rigidity as a whole and a space between the needle trunk and a sewing thread is large, so that sewing work can be stably carried out and operations at high speed can be performed.
Inventors:
Takei
Yoshitsugu, Kojima
Tsutomu
Yoshitsugu, Kojima
Tsutomu
Application Number:
PCT/JP1992/000599
Publication Date:
November 26, 1992
Filing Date:
May 11, 1992
Export Citation:
Assignee:
Organ
Needle
CO., LTD.
Takei, Yoshitsugu
Kojima, Tsutomu
Needle
CO., LTD.
Takei, Yoshitsugu
Kojima, Tsutomu
International Classes:
B21G1/04; D05B85/02; (IPC1-7): B21G1/04; D05B85/02