Back to results
US 6,332,417 B1Granted
Sewing machine needle having a slender eye
AssigneeGroz-Beckert KG
InventorHarry Vornholt
Life of this patent
Estimating the term…
Abstract
A sewing machine needle includes a central longitudinal axis; a blade extending at least partially coaxially with the axis and terminating in a point; and an eye passing though the blade transversely to the axis and having an opening direction. The eye has opposite openings on opposite sides of the blade. Two mutually spaced walls forming part of the blade have respective inner faces bounding the eye. An indentation is provided in the blade in a region of at least one of the eye openings. The indentation reduces the height of at least one part of the eye walls as measured from the axis.
Claims21
A sewing machine needle for high-speed operation, comprising
- (a) a central longitudinal axis;
- (b) a blade extending at least partially coaxially with said axis and terminating in a point;
- (c) a sole eye passing through said blade transversely to the axis and having an opening direction;
- said eye having opposite openings on opposite sides of said blade;
- each opening having opposite first and second sides spaced from one another in a direction parallel to said axis;
- said blade having a height measured perpendicularly to said axis;
- said height increasing from said point to a first blade location situated externally of said eye at least at one of said openings and adjoining said first side of said one opening;
- said height further increasing from said first blade location to a second blade location situated externally of said eye at said one opening and adjoining said second side of said one opening;
- (d) two mutually spaced walls forming part of said blade and having respective inner faces bounding said eye;
- and
- (e) an indentation provided in said blade in a region of said at least one of said openings;
- said indentation dropping below a height level of said first and second blade locations;
- said indentation reducing a height of at least one part of said walls as measured from said axis.
10 more elements
A sewing machine needle comprising
- (a) a central longitudinal axis;
- (b) a blade extending at least partially coaxially with said axis and terminating in a point;
- (c) an eye passing through said blade transversely to the axis and having an opening direction;
- said eye having opposite openings on opposite sides of said blade;
- (d) two mutually spaced walls forming part of said blade and having respective inner faces bounding said eye;
- and
- (e) an indentation provided in said blade in a region of at least one of said openings;
- said indentation reducing a height of at least one part of said walls as measured from said axis;
- said indentation being provided solely in the region of one of said openings;
- said walls having a thickness that is greater in a wall zone adjoining said indentation than in a wall zone remote from said indentation.
7 more elements
A sewing machine needle having a nominal thickness and comprising
- (a) a central longitudinal axis;
- (b) a blade extending at least partially coaxially with said axis and terminating in a point;
- (c) an eye passing through said blade transversely to the axis and having an opening direction;
- said eye having opposite openings on opposite sides of said blade;
- (d) two mutually spaced walls forming part of said blade and having respective inner faces bounding said eye;
- and
- (e) an indentation provided in said blade in a region of at least one of said openings;
- said indentation reducing a height of at least one part of said walls as measured from said axis;
- said indentation having a substantially constant radius of curvature;
- said radius being 3-4 times greater than the nominal thickness.
7 more elements
A sewing machine needle comprising
- (a) a central longitudinal axis;
- (b) a blade extending at least partially coaxially with said axis and terminating in a point;
- (c) an eye passing through said blade transversely to the axis and having an opening direction;
- said eye having opposite openings on opposite sides of said blade;
- (d) rounded eye webs bordering said eye and being spaced from one another parallel to said axis;
- one of said eye webs having a concave bottom face over which a thread is adapted to run as the thread passes through the eye;
- (e) two mutually spaced walls forming part of said blade and having respective inner faces bounding said eye;
- and
- (f) an indentation provided in said blade in a region of at least one of said openings;
- said indentation reducing a height of at least one part of said walls as measured from said axis.
7 more elements
A sewing machine needle comprising
- (a) a central longitudinal axis;
- (b) a blade extending at least partially coaxially with said axis and terminating in a point;
- (c) an eye passing through said blade transversely to the axis and having an opening direction;
- said eye having opposite openings on opposite sides of said blade;
- (d) rounded eye webs bordering said eye and being spaced from one another parallel to said axis;
- said rounded eye webs having a thickness and a radius of curvature having a length equaling approximately one half of the web thickness;
- (e) two mutually spaced walls forming part of said blade and having respective inner faces bounding said eye;
- and
- (f) an indentation provided in said blade in a region of at least one of said openings;
- said indentation reducing a height of at least one part of said walls as measured from said axis.
7 more elements
Dependencies are inferred from the claim text.