Abstract:
A sewing needle is used in a sewing machine. The sewing needle has a working portion with a needle eye and a region which tapers into a needle tip. The needle eye passes through a needle body in a transverse direction perpendicularly to a longitudinal axis of the needle body. A twist groove is recessed in a front face of the needle body relative to the outer contour of the needle body, the twist groove extending in the direction of the needle tip from the needle eye. The twist groove is formed by a thread groove. The twist groove is preferably symmetrical relative to a first longitudinal central plane spanned by the longitudinal axis and the transverse direction. The thread groove has a groove portion adjacent to the needle eye and two end portions, each having a thread groove opening, remote from the needle eye.
Abstract:
An insertion needle that is turnably mounted on a handle, which holds the insertion needle, wherein the insertion needle includes a turn arm that turns so as to face the tip of the insertion needle, and a target site that guides the insertion needle provided on the tip of the turn arm, and is further provided with: through-holes in two locations that are provided separated in the longitudinal direction of the tip of the insertion needle; an indentation formed between these through-holes; and a groove in the direction from the tip of the insertion needle toward the base of the insertion needle. Furthermore, the insertion needle is suitably used in urinary incontinence surgery, pelvic organ prolapse surgery or the like.
Abstract:
A quilting needle for achieving substantially uniform stitches in a multi-layer fabric/batten quilting substrate. The needle is formed as an elongated straight slender needle body having an eyelet at one end thereof sized for receiving a quilting thread therethrough and a sharp quilting fabric piercing point at another end of the needle body. A viewable stitch size guide is permanently disposed on the needle body so as not to disrupt the smooth needle body surface and is positioned from the point a distance equal to a desired stitch size. Successive stitches formed into the substrate of uniform size or length when the needle body is consistently pierced through the substrate to a depth defined when said stitch size guide just touches or meets and aligns with an obverse surface of the substrate before piercing the point into a reverse surface of the substrate to complete each stitch.
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.
Abstract:
A multi-needle zipper tape stitching mechanism includes a bottom needle plate having two parallel guide grooves for the passing of two chains (rows of teeth, a guide plate with two needle holes mounted on the bottom needle plate, a guide bar for guiding two zipper tapes over the chains being delivered through the bottom needle plate, an upper needle plate covered on the bottom needle plate and defining with the bottom needle plate two zipper tape passage ways for the passing of the zipper tapes and the chains, and two stitching needles reciprocated through respective needle holes on the upper needle plate and the needle holes on the guide plate to fasten the chains to the zipper tapes with three lines of stitches respectively, the stitching needles each having three needle rods arranged in parallel and spaced from one another at a different pitch, the needle rods each having a point and an eye on the point for the insertion of a respective thread.
Abstract:
Needle for use in the rodless dispensing of plastic fasteners of the type comprises a flexible filament and a cross-bar disposed at one end of the flexible filament. In one embodiment, the needle comprises a solid elongated member terminating at its front end in a tip adapted to penetrate a desired article of commerce and a chamber adapted to receive a cross-bar of a plastic fastener. The chamber includes a front end, a rear end, an open top and an open bottom. The open top, which is spaced rearwardly a distance from the tip, is appropriately sized and shaped to permit the insertion and removal of a cross-bar into and from the chamber. The front end is downwardly angled towards the tip to releasably engage the top surface of the front end of the cross-bar, and the rear end has a pair of walls intersecting in a V-shape to releasably engage both the top surface and the bottom surface of the rear end of the cross-bar in such a way as to prevent the cross-bar from being pulled out of the chamber through the open top when low tension is applied to the flexible filament (i.e., prior to the complete insertion of the cross-bar through the article of commerce), but yet, so as to cause the cross-bar to be pulled out of the chamber through the open top when high tension is applied to the flexible filament (i.e., following the complete insertion of the cross-bar through the article of commerce).
Abstract:
A relatively long needle (22) is supported at the lower end of a needle bar (28). The needle bar (28) and needle (22) are moved up and down and forwardly and rearwardly. The needle bar (28) and needle (22) are moved forwardly while they are in materials (M) which are being sewed together, to in that manner advance the materials (M) stitch by stitch. The materials (M) are supported on a bed (10) which includes a slot (20) which is elongated in the direction of the stitch path. The needle (22) is received in the slot (22). A side boundary of the slot (20) provides a side guide surface (84) which is contiguous a first side of the needle (22). An upper thread (76) extends downwardly from a thread guide (110) into a side groove (86) in the first side of the needle (22), to and through a needle eye (80). A recess (82) is formed in the second side of the needle (22) above the needle eye (80). Following downward movement of the needle (22) through the materials (M), the needle (22) is moved upwardly. The first upward movement of needle (22) forms a loop (76') in the upper thread (76) laterally adjacent the recess (82). A shuttle hook moves along a path which includes the recess (82) and engages the loop (76') and moves the loop into a knot forming engagement with a lower thread (78). The side guide surface (84) prevents sideways deflection of the needle (22) away from the shuttle hook at a time when a presser foot component (32) is lifted to take pressure off of the materials (M) and allow the needle (22) to advance the materials (M) forwardly.
Abstract:
A sewing implement is provided comprising a metallic needle fixedly attached to a short length of fibrous thread wherein the needle and thread are attached by a film of plastic coating which extends over the entire length of the needle and a portion of the adjacently disposed end of said thread.
Abstract:
The present invention relates to a method for the manufacture of sewing machine needles from a cylindrical length of wire by form pressing a length of wire having a diameter which corresponds to the thickness of the needle butt, the wire is reduced to approximately the final cross sectional dimension over at least the length of the needle shank and the shoulder. The thread grooves are pressed in from the curved outer surfaces of the length of wire within the region of the needle shank. The reduction in cross section is effected by pressing opposite cross sections of wire material to form laterally protruding flat burrs. In between the flat burrs are transverse convex curved outer surfaces which lie within the final diameter. This intermediate form of the needle closely resembles its complete final shape. Several needle blanks, in particular two needle blanks, are attached together in the region of their points for simultaneous form pressing. The flat burrs are then removed completely or to the greater extent by a subsequent cutting.
Abstract:
A sewing machine needle has a chamfer portion formed in its shaft which defines an interspace between the needle shaft and a thread running in an upward direction parallel to the needle shaft to permit a thread loop catching device to enter into the interspace during machine operation. The chamfer portion is formed by a portion of the needle shaft which is displaced with respect to the axis of the needle which extends substantially parallel thereto and yet which has substantially the same transverse cross-section as other portions of the shaft and by shaft transition portions which adjoin the displaced shaft portion which extend at an angle with respect to the needle axis. In this manner, a deep chamfer portion is obtained so as to increase the interspace between the needle shaft and sewing thread so that a reliable engagement of the sewing thread by the thread loop catching device can be achieved without the necessity of a so-called loop stroke. Moreover, sufficient resistance to buckling of the needle is achieved despite the increase in depth of the chamfer portion.