Sewing machine needle and method for manufacturing same
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United States of America Patent
Stats
-
Feb 28, 1995
Grant Date -
N/A
app pub date -
Jan 7, 1993
filing date -
May 10, 1991
priority date (Note) -
In Force
status (Latency Note)
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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.
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