Sewing machine needles
AssigneeThe Singer Company
InventorJosef Zocher
Life of this patent
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Abstract
A sewing machine needle is disclosed in which the needle blade including the long groove and the eye portion with a thin eye-accommodating web is cold formed in one finless flow pressing operation. Regardless of the diameter of the needle blade a uniform relation thereof with the needle orienting flat on the needle butt is achieved by lateral displacement of the needle blade axis relatively to the axis of the needle butt. In addition, the side flanges of the long groove, particularly in the eye portion are flared to facilitate threading.
Claims2
A sewing machine needle having a butt portion and a blade portion formed with a long groove extending from said butt portion to closely adjacent the free extremity of said blade portion, two lengthwise extending flanges formed on said blade portion, each of said flanges by means of a substantially flat inside surface thereon defining one side of said long groove, an eye formed from said long groove transversely through said blade portion adjacent the free extremity of said blade portion, a point formed on said blade portion free extremity, each of said flanges being formed with an outside surface substantially parallel to the flat inside surface thereof, said parallel surfaces of the two flanges at least adjacent to said eye diverging from said long groove at an angle at least 30.degree..
A sewing machine needle having a cylindrical butt portion formed lengthwise with a needle orienting flat, and a generally cylindrical blade portion extending from said butt portion and formed with a transverse thread accommodating eye, the central axis of said cylindrical blade and butt portions being offset to position said blade portion at a predetermined lateral spacing from the plane containing the needle orienting flat.
Dependencies are inferred from the claim text.