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US 3,986,468 AGranted
Sewing machine needle
AssigneeUnion Special Corporation
InventorsHenryk Anthony Szostak, William Roy Parker
Life of this patent
Estimating the term…
Abstract
An improved sewing machine needle provided with tapered flat surfaces on both sides of the needle, beginning at a point slightly rearward of the needle's eye and converging towards the point of the needle.
Claims3
A sewing machine needle comprising:
- a cone shaped leading end means terminating in a sharp point means;
- a shank means at the butt means of said needle;
- a blade means intermediate said cone shaped leading end means and said shank means;
- eye means located at the leading end of said blade means;
- thread groove means on each side of said needle extending from the rearward end of said cone shaped leading end means to a point closely adjacent said shank means in a plane parallel to the major axis of said needle;
- and
- elongated flat means extending on the same side of said needle as said thread groove means, said elongated flats extending from the rearward side of said eye means and symmetrically converging towards said point means forming an acute angle to said major axis and terminating between the forward end of said eye means and said sharp point means.
4 more elements
A needle means for use in a sewing machine comprising:
- a shank means portion;
- a blade means portion;
- a ball eye portion;
- a flat side means on each side of said blade means portion;
- thread groove means extending along said flat side means rearwardly extending from a place adjacent said ball eye portion to the leading end of said shank means portion, and
- tapered flat means on the same side of said flat side means as said groove means, said tapered flat means cut in said ball eye means portion whereby gradually reducing the depth of said groove means in said ball eye portion.
3 more elements
Dependencies are inferred from the claim text.