Sewing machine needle having a recess
AssigneeGroz-Beckert KG
InventorsKai-Uwe Haug, Bernd Eugen Hillenbrand, Florian Perotti
Life of this patent
Estimating the term…
Abstract
A sewing machine needle (1) is described, which reduces the friction between the blade (2) of the sewing machine needle (1) and the fabric and which can be manufactured economically in large numbers. The sewing machine needle (1) includes a needle eye (3) and at least one recess (5), wherein the distance between an upper edge (6) of the recess (5) and the lateral position of the axis (12) of the needle eye (3) differs from the distance between a lower edge (7) of the recess (5) and the lateral position of the axis (12) of the needle eye (3).
Claims15
A sewing machine needle (1), comprising:
- a blade (2) which extends in a longitudinal direction (L),
- a needle eye (3) which extends completely through the sewing machine needle (1) in an elevational direction (H), the elevational direction (H) being orthogonal to the longitudinal direction (L),
- a scarf portion (24) of the blade (2) extending along the longitudinal direction (L), the scarf portion (24) comprising a scarf (16);
- at least one recess (5) formed in the blade configured to reduce friction between the blade (2) and a fabric, wherein the at least one recess (5) extends outside of the scarf portion (2) in the longitudinal direction (L) and which reduces a reach of the blade (2) in a lateral direction (B), the lateral direction (B) being orthogonal to the elevational (H) and the longitudinal (L) directions,
- wherein the at least one recess (5) has an upper edge (6) and a lower edge (7), at which the at least one recess (5) ends in the elevational direction (H),
- wherein the at least one recess (5) has, at least at one position along its length in the longitudinal direction (L), a height (11) which corresponds to at least 30% of a height (10) of the blade (2) at the at least one position, and
- wherein an upper edge distance (O), which corresponds to a distance in the lateral direction (B) between the upper edge (6) of the at least one recess (5) and a position of an axis (12) of the needle eye (3) in the lateral direction (B), differs from a lower edge distance (U), which corresponds to a distance in the lateral direction (B) between the lower edge (7) of the at least one recess (5) and the position of the axis (12) of the needle eye (3) in the lateral direction (B).
A method for production of a sewing machine needle (1), comprising:
- producing the sewing machine needle using a tool movement exclusively in an elevational direction (H) and/or a longitudinal direction (L), the sewing machine needle comprising:
- a blade extending in the longitudinal direction (L),
- a needle eye (3) that extends through the sewing machine needle (1) in an elevational direction (H), which is orthogonal to the longitudinal direction (L),
- a scarf portion (24) of the blade extending along the longitudinal direction (L), the scarf portion (24) comprising a scarf (16);
- at least one recess (5) formed in the blade configured to reduce friction between the blade (2) and a fabric, wherein the at least one recess (5) extends outside of the scarf portion (2) in the longitudinal direction (L) and, which is delimited in the elevational direction (H) by an upper edge (6) and a lower edge (7),
- wherein an upper edge distance (O) corresponding to a distance in a lateral direction (B) between the upper edge (6) of the at least one recess (5) and a position of an axis (12) of the needle eye (3) in the lateral direction (B), differs from a lower edge distance (U), the lower edge distance (U) corresponding to a distance in the lateral direction (B) between the lower edge (7) of the at least one recess (5) and the position of the axis (12) of the needle eye (3) in the lateral direction (B).
Dependencies are inferred from the claim text.