Sewing machine needle and method for manufacturing same
AssigneeOrgan Needle Co., Ltd.
InventorsYoshitsugu Takei, Tsutomu Kojima
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AssigneeOrgan Needle Co., Ltd.
InventorsYoshitsugu Takei, Tsutomu Kojima
Estimating the term…
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.
A method for manufacturing a sewing machine needle, said needle including a shank, a blade arranged so as to extend from said shank and a needle point formed at a distal end of said blade, in which a continuous long groove of a recessed shape is provided so as to extend from said shank to a portion of said blade in proximity to said needle point, a needle eye portion is formed along said long groove and said blade is formed with a clearance-above-eye, comprising the steps of:
A sewing machine needle including a cylindrical shank of a large diameter, a blade arranged so as to extend from said shank and a sharp needle point formed at a distal end of said blade, in which a continuous long groove of a recessed shape is provided so as to extend from said shank to a portion of said blade in proximity to said needle point, a needle eye portion is formed along said long groove and said blade is formed with a clearance-above-eye;
Dependencies are inferred from the claim text.