KR101997537B1 - Healds with thread-friendly thread eye - Google Patents

Abstract

The invention relates to a shear (10) for a shear axis (14). The sheath 10 comprises a shear body 11 which is preferably made of plastic material by injection molding. The threaded eye 15 of the sheath 10 is arranged for the warp yarn 16 to move in the warp direction F. [ The threaded eye 15 is delimited by two thread-bearing surfaces 25 arranged opposite to each other when viewed in the longitudinal direction L of the elongated body 11. The two thread support surfaces 25 have the same design. Each thread bearing surface 25 has a first flat surface portion 42 and a second flat surface portion 43. When viewed in the warp direction F, the inclination angles of the two surface portions 42, 43 are constant and preferably different. The inclination angle is measured with respect to the reference plane E which is oriented in the horizontal direction when the sheath 10 is in the use position. The two surface portions 42 and 43 are connected to each other by intervening central bends 44 with no steps or edges and the central bend has a convex shape when viewed in the direction of the thread supporting surface 25 .

Description

{HEALDS WITH THREAD-FRIENDLY THREAD EYE} with a thread-

The present invention relates to a heald for a twin axis of a loom. A plurality of healds are mounted on the heald axes, so that each heald has a thread eye that guides the warp when the heald is in use position. During operation, the axes of the axes are moved up and down in the loom to form a shed. The weft is moved into the shade. In doing so, the warp yarns receive considerable stress as well as the healds. However, the high acceleration and deceleration of the sheaves must not cause excessive wear or damage to the warp and sheath.

U.S. Publication No. 5,348,055A describes a heald made from a web-type metal part. A threaded eye is created by punching a metal web. As a result, two bridges are formed which define the limits of the thread eye and extend in the longitudinal direction of the sheath body. To pass the warp yarns, the bridges are bent out of the plane of the metallic web and thus are spaced apart from one another in the warp direction and in the transverse direction with respect to the longitudinal direction. In view of this shearing, the edges are formed in the area of the threaded eye, and the edges partially cause severe wear of the warp. The publication DE 43 36 362 C2 discloses a similar heald.

Bulletin EP 1 739 215 B1 describes the shear of plastic materials. The two thread bearing surfaces delimiting the thread eye in the longitudinal direction of the thread are flat and rounded at the outer sides of the heptagonal body. The distance of the two bridges that intersect in the warp direction forms the size of the thread bearing surfaces with approximately rectangular outlines. As a result, the heald is relatively thick in the region of the thread eye.

Other sheaths of plastic materials are described in publication < RTI ID = 0.0 > 1 739 215 B1. ≪ / RTI > The two thread bearing surfaces defining the limb body length in the longitudinal direction are constructed in a thin, bridging manner and are approximately equal in thickness to the two bridges defining the thread eye. The supporting surface for the warp is very small.

Another shear of plastic materials is known from the publication CN 2 723 472 Y. The curved thread support surface is provided between two bridges that delimit the threaded eye and extends in the longitudinal direction of the limb body.

In view of these known state of the art, it can be seen that the object of the invention is to create a heald that reduces the wear of the warp.

This object is achieved by a healds representing the features of claim 1.

According to the present invention, the healds comprise a heptagon body extending longitudinally between two end eyelets. The pulley body has a threaded eye for receiving the warp yarn. The warp yarn moves through the thread eye in the warp direction. It should be understood that the direction of warpage refers to the direction of extension of the warp in the threaded eye as viewed in the longitudinal direction of the warp yarn or as viewed from the associated thread support surface. The warp is deflected by the sheath in the longitudinal direction of the thread. Looking at the overall length of the warp yarn, the warp yarns necessarily extend in the warp plane formed by the longitudinal direction of the pulp body and the warp direction.

The threaded eye is delimited by the two thread support surfaces of the prism body, and the support surfaces are spaced a distance from each other in the longitudinal direction. Each thread bearing surface extends between a first longitudinal side and a second longitudinal side of the elongated body. The two longitudinal sides are preferably designed in such a way that they are adjacent to the threaded eye without steps and / or edges. Each thread bearing surface has a first flat surface section and a second flat surface section. The two surface portions are connected to each other through the central bent portion without the steps and edges. Thus, the two surface portions are interconnected in a thread-friendly manner. The two surface portions can be used to prespecify the warp inclination angle on the warp entrance side and the warp entrance side of the thread eye by the appropriate inclination angle of each surface portion. In this way, when the warp yarns are placed on their respective thread support faces, the profiles of the thread support faces viewed from the warp direction can be aligned with the open sheath position of the sheath. Thus, in the open shed position, the support surface between the warp and the sheath is large, thus reducing the local stress of the warp. The abrasion of the warp, as well as the wear of the warp, is also reduced.

Advantageously, the curvature of the central bend is constant in the warp direction. Thus, the contour of the arcuate section follows a constant radius in the warp direction, that is to say the cylindrical section of the circular cylinder. The curvature itself ensures that the stress on the warp in the threaded child is not too great.

As seen in the longitudinal direction of the sheath body, the shear body includes two bridges that delimit thread eyes, and the bridges preferably have the same outer shape. In this embodiment, a flat thread guide surface is provided for each bridge at a side facing the thread support surface. In particular, each threaded surface is oriented such that its normal vector is transverse to the warp direction and transverse to the longitudinal direction. As a result, the thread guide surface extends in one plane defined by the warp direction and the length direction. The thread guide surface oriented in the warp direction is arranged to guide the warp thread through the thread eye in a thread-friendly manner.

In another preferred embodiment, the longitudinal distance (measured in the warp direction) between the two bridges is at least 5 times the lateral distance measured between the two bridges at right angles to the warp direction and at right angles to the longitudinal direction It is big. Thus, the thread bearing surface disposed in the area between the bridges provides a warp surface to the warp sufficiently large in the longitudinal direction of the thread to further reduce any local stress on the warp. The width of the shear in the threaded eye is at most 20% greater than the sum of the thicknesses of the two bridges at right angles to the warp direction and at right angles to the longitudinal direction. As a consequence, the shear is relatively thin in the transverse direction, which is why it can make the number of the helixes very large in the axis of the sheath.

Further, each of the thread supporting surfaces has a first transition portion bent in the warp direction between the first longitudinal side surface and the first surface portion of the trunk body, and / or a second transition portion between the second longitudinal side surface and the second surface portion It is advantageous to have a second transition portion bent in the warp direction. As a result, edgeless arcuate transitions are possible between the two lateral surfaces of the respective thread support surface and the limb body. The curvatures of the two transitions can have different dimensions. In a preferred embodiment, the curvatures of the first and / or second transitions are constant when viewed in the warp direction. The first and / or second transitions transition into adjacent longitudinal side surfaces as well as adjacent flat surface portions of the thread bearing surface without specific steps and edges.

The end of the first lateral side adjacent to the first transition and / or the end of the second lateral surface adjacent to the second transition preferably form an acute angle with the direction of warp. Both ends of the first and second lateral surfaces extend at equal distances from each other, in particular in a parallel, inclined manner with respect to the warp direction. The ends of the respective lateral surfaces adjacent to the transition portion are in contact with the two bridges of the heptagon body.

In a preferred embodiment, the first lateral surface and / or the second lateral surface (viewed in the longitudinal direction) is rotated in an area adjacent to the threaded eye at least about an axis parallel to the longitudinal direction, / Or the normal vector of the second lateral surface is at an acute angle with the warp direction adjacent to the respective thread support surface. In the region of the threaded eye, the sheath body is rotated about an axis extending parallel to the longitudinal direction in this embodiment, thus forming a passage region for the warp between the two bridges.

It is advantageous if, at the open position of the associated sheath, the inclination angle of the first surface portion in the warp direction matches the warp entry angle and / or the inclination angle of the second surface portion in the warp direction matches the warp entry angle. The warp entry angle is the angle at which the warp thread guided through the threaded eye moves toward the heald with respect to a reference plane extending at right angles to the longitudinal direction. The warp entry angle is the angle of the warp to the reference plane, from which the warp moves toward the selvedge. In this design, the local stress on the blade itself and therefore the local stress on the thread support surface of the shear is minimized, thus minimizing wear. In general, the warp entry angle and warp entry angle have the same size.

On the side of the bridge opposite the thread guide surface, each bridge can have a flat outer surface that is well aligned parallel to the thread guide surface. Thus, the flat outer surfaces can extend parallel to the warp direction, which is why warp shifted between two adjacent sheaths can slide along the outer surface.

At the two ends of the longitudinally arranged shear body, the shear body has an end eyelet area in which the end islets of the sheath are arranged for mounting the shear bearing rails. In a preferred embodiment, the two lateral surfaces of the limb body are configured such that there are no steps or edges outside of at least these end-eyelet areas. As a result, this ensures that the healds can slide past the shifted warps through the healds without the healds being caught in these warps.

Preferably, the sheath is composed of a composite material based on a plastic material and / or a plastic material, and in particular is produced by a casting process, for example by injection molding. The sheath may be made of a piece of coherent material without joints and joints. Preferably, the threaded eye is directly delimited by the limb body. For example, the elongated body inserts, such as the sheath rail, may be omitted.

Advantageous embodiments of the healds according to the invention result from the detailed description as well as the dependent claims. The detailed description is limited to the essential features and various situations of the invention. The drawings may be used for further reference. In the following, the present invention will be described in terms of exemplary embodiments of the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic side view of a trapezoid viewed transversely transversely with respect to the warp direction and the longitudinal direction of the trapezoidal body.
2 is a schematic perspective view illustrating the progression of warp yarns passing through two exemplary sheaths;
3 is a schematic side view showing the progress of the warp yarn as in Fig.
Fig. 4 is a section of an exemplary embodiment of a heald; Fig. 4 is a perspective view of a section having a threaded eye; Fig.
Fig. 5 is a cross-sectional view of the heptad of Fig. 4 along section line VV in Fig. 4. Fig.
6 is an enlarged view showing a thread eye of a heald as shown in Figs. 4 and 5. Fig.
7 is a schematic view of a thread supporting surface of a heald in a longitudinal direction.
Fig. 8 is a partial cut-away view of a pulp body in the region of the thread support surface, with the cut surface oriented in the warp direction and the longitudinal direction; Fig.

The present invention relates to a healds 10 schematically illustrated in Fig. In an exemplary embodiment, the sheath 10 comprises a shear body 11 made of a plastic material or a composite material based on a plastic material, for example, by casting methods such as injection molding. The elongated body 11 extends in the longitudinal direction L and has an end eyelet region 12 with an end eyelet 13 at each of the two longitudinal ends. The end eyelets 13 are arranged to mount the heald 10 to the respective associated spherical bearing rails of the longitudinal axis 14. [ The elongated body 11 has a threaded eye 15 positioned approximately centrally between the two end eyelets 13. At the point of use of the sheath 10, the warp yarn 16 is guided through the threaded eye 15. When viewed in the longitudinal direction L, the warp yarn 16 moves in the warp direction F through the thread eye 15 of the heptaploth 10.

In order to make the shade, the longitudinal axes 14 are moved in the vertical direction - at the position of use of the healds 10 corresponding to the longitudinal direction L of the elongated body 11. In the process, the warp yarns 16 guided through the threaded eyes 15 of the healds 10 are deflected upward and downward beyond the horizontal plane. Starting at the backrest 19 or starting at the partial rods, the warp yarns 16 extend toward the respective associated shear 10 and enter the threaded eye 15 of the shear 10 at the warp entrance side 20 . In the open-shade position, the warp yarns 16 extend against the horizontal plane at a warp entry angle? Below the warp entry angle? Toward the threaded eye 15 on the warp entry side 20. On the warp entry side 21 facing the warp entry side 20 the warp yarn 16 extends beyond the warp runner angle beta from the threaded eye 15 against the horizontal plane and extends towards the width 22 . 3, the warp entry angle [alpha] and warp entry angle [beta] may have different sizes depending on whether the trapezoidal axis 14 is in the upper shade or the lower shade, For example, it may take the first values alpha 1, beta 1 in the upper shed and the second values alpha 2, beta 2 in the lower shed. In addition, the warp entry angle? And warp entry angle? Are also a function of the position of the shed axle between the displacement 22 and the back 19, which is shown in FIG. 3 as the dotted spheric axis 14 have. The warp entry angles? Are less than warp entry angles? Because the distance from the back 19 to the traverse axes 14 is greater than the distance 22 from the trapezoidal axis? 14).

Outside of the at least two end-eyelet regions 12, the heptadular body 11 has an outer surface completely free of edges and steps. As a result, it is ensured that the warp yarns 16 of the other shear axis 14 passing between two adjacent shear beams 10 can slide along the shear 10 in a thread-friendly manner without being caught do. As a result, the risk of excessive wear or thread breakage of the warp yarns 16 is reduced. In Fig. 4, the lines drawn on the trapezoidal body 11 are merely intended to show the outline of the trapezoidal body 11 and not the edges.

To pick up the warp yarn 16 in a thread-friendly manner, the threaded eye 15 has a special design. In the longitudinal direction L, the threaded eye 15 is delimited by two thread-bearing surfaces 25 arranged opposite one another. The warp yarn 16 guided through the threaded eye 15 is supported by one of the two threaded supporting surfaces 25 when the vertical axis 14 that supports the sheared light 10 is in the upper shade or the lower shade .

In the transverse direction Q, which is perpendicular to the warp direction F and perpendicular to the longitudinal direction L, the thread eye 15 is bounded by two bridges 26, . Each bridge 26 has a flat threaded guide surface 27 in terms of the warp 16 being moved through the threaded eye 15. The thread guide surface 27 of the bridge 26 extends not only in the warp direction F but also in a plane defined by the longitudinal direction L. [ The normal vector NF of the thread guide surface 27 indicates the transverse direction Q. [ The threaded guide surface 27 of the bridge 26 connects the two threaded support surfaces 25 of the elongated body 11. As a result, a threaded eye 15 is formed and the threaded eye is circumferentially delimited by the two threaded faces 25, as well as by the two threaded faces 27 on the bridges 26.

Each of the bridges 26 has a flat outer surface 28 on the side remote from the threaded eye 15, opposite the threaded guide surface 27. The outer surface 28 extends parallel to the thread guide surface 27. The thickness d of the bridge 26 in the transverse direction Q is measured between the thread guide surface 27 and the outer surface 28 and is in the range of approximately 0.4 mm to 0.5 mm. The outer surface 28 of the bridge 26 is part of the outer surface of the sheath body 11 and is not limited by the steps or edges.

The two longitudinal edges 29 of each bridge 26, which roughly indicate the warp direction F, connect the threaded guide surface 27 and the outer surface 28. The longitudinal edges are curved or arcuate so that threaded guide surface 27 and outer surface 28 are connected to each other in a step-wise and edge-free manner via two longitudinal edges 29 of bridge 26. The two longitudinal edges 29 of the two bridges 26 of the elongated body 11 facing each other in the warp direction F have a constant radius in the exemplary embodiment, as is clearly shown in Fig. The longitudinal edges 29 of the bridges 26 oriented away from the threaded eye 15 may have several radii and / or flat sections.

There is a distance DL between the two bridges 26 that delimits the threaded eye 15 and the distance corresponds to the inner width of the two bridges 26 in the warp direction F. [ The transverse distance DQ is measured between the two bridges 26 in the transverse direction Q, for example between two flat thread guide surfaces 27, and the transverse distance DQ is measured in the transverse direction Q by the bridge 26). ≪ / RTI > The longitudinal distance DL is at least 5 times, in particular 5 to 7 times greater than the transverse distance DQ. The transverse distance DQ may be, for example, 0.15 mm to 0.2 mm. The longitudinal distance DL may be, for example, 1 mm to 1.5 mm. The width B of the elongated body 11 in the region of the threaded eye 15 is defined by the distance of the outer sides 28 of the bridges 26 measured in the transverse direction Q. [ In the exemplary embodiment shown here, the width B may be between 1.0 mm and 1.5 mm. The width B of the elongated body 11 in the threaded eye 15 may be at most 10% larger than the sum of the thicknesses d of the two bridges 26, for example.

The thread support surface 25 is divided into several areas. Other areas are shown in Figures 7 and 8. Each thread support surface 25 extends between a first lateral surface 33 and a second lateral surface 34 of the elongated body 11. Two lateral surfaces 33 and 34 are disposed on the flat sides of the elongated body 11 and the flat sides are viewed from each other at the longitudinal edges 35 of the elongated body 11, And without edges - to each other. The two lateral surfaces 33, 34 are always arranged so as to be parallel to each other. The normal vector NA of the first lateral surface 33 and the normal vector NA of the second lateral surface 34 point in the transverse direction Q and end in the respective end eyelet region 12. Adjacent to the threaded eye 15 the two lateral surfaces 33 and 34 are rotated with respect to the longitudinal center plane M of the elongated body 13 and the center plane is perpendicular to the transverse direction Q, So that the normal vector NA of the two lateral surfaces 33 and 34 adjacent to the threaded eye 15 extends in a sloping manner with respect to the transverse direction Q and in the warp direction F In an inclined manner. The normal vector NA forms the transverse direction Z and the rotation angle y, and the rotation angle is, for example, 15 to 20 degrees. The two bridges 26 are offset in relation to the longitudinal center plane M of the elongated body 11 at the other sides and the resulting transverse distance DQ is formed between the two bridges 26. [

By this orientation of the lateral surfaces 33,34 of the elongated body 11 in the region of the threaded eye 15 an end 33a of the first lateral surface 33 adjacent to the threaded bearing surface 28, Or the end 34a of the second lateral surface 34 adjacent the thread support surface 25 extends beyond the angle of rotation y with respect to the warp direction F and consequently, Thus extending in an inclined manner with respect to the transverse direction (Q).

The distance DS between the two lateral surfaces 33,34 of the limb body 11 adjacent to the threaded eye 15, measured in the direction of the normal vectors NA of the two lateral surfaces 33,34, Is greater than the thickness (d) of one bridge (26). In an exemplary embodiment, the distance DS of the two lateral surfaces 33, 34 approximately corresponds to the diagonal dimension of the bridge 26. The distance DS between the two lateral surfaces 33, 34 is less than the longitudinal distance DL between the two bridges 26. [

The thread support surface 25 extends between an end portion 33a of the first lateral surface 33 and an end portion 34a of the second lateral surface 34. The thread bearing surface includes a first transition portion 40 adjacent the first lateral surface 33 and a second transition portion 41 adjacent the second lateral surface 34. The two transition portions 40 and 41 are bent. In the warp direction F, the curvatures of the transitions 40, 41 are constant in the example. 8, the trunk body 11 is cut in a plane in the region of the thread support surface 25, and the plane extends parallel to the longitudinal center plane M of the sheath body 11. [ As a result, the cut surface is formed by the longitudinal direction L as well as the warp direction F. [ The cutting surface extends obliquely with respect to the first lateral surface 33 and the second lateral surface 34, adjacent to the thread support surface 25. In this cross section, the two transitions 40, 41 have an arcuate contour, for example similar to an arc, wherein the arc of the first transition 40 has a radius r1 and the second transition 41, Has a second radius r2. The two radii r1, r2 may have different sizes, but may also have the same size.

The above-mentioned contour of the transition portions 40, 41 is limited to the thread guiding region A of the thread eye 15. Thread guiding area A is understood to mean the area of the threaded eye 15 in which the warp yarns 16 can move between the bridges 26 in the transverse direction Q. [ By way of example, the threaded guiding area A is delimited by two planes formed by the two threaded guide faces 27 of the bridges 26 (Fig. 7). The shape of the thread support surface 25 described above and discussed below and its sections are limited to the thread guide area A in the preferred exemplary embodiment. Outside this thread guiding area A, the thread guiding surface 25 has a planar and / or convex shape with no steps and no edges, and can deviate from the shape formed in the thread guiding area A. [ A concave depression on the thread support surface 25 is avoided from the inside and outside of the thread guiding area A. [

In a modified embodiment, the curvature of the transition of one of the two transitions 40, 41 may not be constant in the warp direction F.

In addition, the thread support surface 25 has a first flat surface portion 42 and a second flat surface portion 43. The two surface portions 42, 43 extend in different planes. The first surface portion 42 extends at an inclination angle? 1 with respect to the reference plane E and the reference plane extends at right angles to the longitudinal direction L. The first inclination angle? 1 is constant in the warp direction. The second surface portion 43 extends obliquely at a second inclination angle? 2 with respect to the reference plane E. The second inclination angle 2 is constant in the warp direction F. [ The first inclination angle delta 1 coincides with the warp entry angle alpha and the second inclination angle delta 2 coincides with the warp advancing angle beta. The warp yarn contacts the two surface portions 42 and 43 and is not particularly stressed through the two transition portions 40 and 41 when the heald 10 is placed in the longitudinal axis 14 in the open-shade position. The warp yarns 16 extend in a tangential direction in the direction of their flat surface portions 42 or 43 so that the warp yarns do not contact the transition regions 40 and 41, And first comes into contact with the flat surface portions 42, 43.

The central bend 44 is between two flat surface portions 42, 43, which connect the two flat surface portions 42, 43 together in a step-wise and edge-free manner. In the warp direction F, the curved portion 44 has a constant contour in the exemplary embodiment. In the sectional view of FIG. 8 along the warp direction F, the contour of the flexure 44 is thus formed by an arc having a third radius r3. In an exemplary embodiment, the center of the arc of the bend 44 is disposed outside the center plane X between the first lateral surface 33 and the second lateral surface 34.

Thus, the contour of the thread support surface 25 is asymmetrical with respect to the center plane X between the two lateral surfaces 33, 34. However, in an alternative embodiment, the contour may be symmetrical with respect to said center plane X.

Generally, the thread support surface 25 is designed to be free of steps and edges. As seen in the warp direction F, the surface exhibits a constant slope or constant curvature of the cross sections, in which case tangential transitions are produced individually. The outline contour of the thread supporting surface is defined in advance in the warp direction F according to the invention and thus inclined with respect to the normal vectors NA of the lateral surfaces 33 and 34 of the trapezoidal body 11, The lateral surfaces are adjacent to the thread support surface 25.

The aforesaid curvature or tilt of the thread support surface 25 and its sections 40,41, 42,43 and 44 is provided in the thread guide area A at least as mentioned, It can escape from the outside.

The invention relates to a shear (10) for a shear axis (14). The sheath 10 comprises a shear body 11 which is preferably made of plastic material by injection molding. The threaded eye 15 of the sheath 10 is arranged for the warp yarn 16 to move in the warp direction F. [ The threaded eye 15 is delimited by two thread-bearing surfaces 25 arranged opposite to each other when viewed in the longitudinal direction L of the elongated body 11. The two thread support surfaces 25 have the same design. Each thread bearing surface 25 has a first flat surface portion 42 and a second flat surface portion 43. When viewed in the warp direction F, the inclination angles delta of the two surface portions 42, 43 are constant, preferably differently sized. The inclination angle [delta] is measured with respect to a reference plane E that is oriented in the horizontal direction when the shearing light 10 is in the use position. The two surface portions 42 and 43 are connected to each other by intervening central bends 44 with no steps or edges and the central bend has a convex shape when viewed in the direction of the thread supporting surface 25 .

10: Heather
11:
12: end islet area
13: End eyelets
14:
15: Threaded child
16: warp
19: Backrest
20: warp entrance side
21: warp advance side
22: Variation
25: thread supporting surface
26: Bridge
27: thread guide face
29: Outer side
33: first lateral surface
33a: an end of the first lateral surface
34: second lateral surface
34a: an end of the second lateral surface
35: longitudinal edge of the limb body
40: first transition part
41: second transition part
42: first surface portion
43: second surface portion
44: Bend
α: Warp angle
alpha 1: first value of warp entry angle
alpha 2: second value of warp entry angle
β: warp entry angle
beta 1: first value of warp entry angle
beta 2: second value of warp entry angle
y: rotation angle
delta 1: first inclination angle
? 2: second inclination angle
B: width of the pulsating body
d: Thickness of bridge
DL: Lengthwise distance
DQ: Crossing distance
DS: distance between lateral surfaces
E: Reference plane
F: warp direction
L: longitudinal direction
M: longitudinal center face
NA: normal vector of lateral surfaces
NF: Normal vector of thread guides
r1: 1st radius
r2: second radius
r3: third radius
Q: transverse direction
X: center face

Claims (15)

As the sheath 10 for the sheath axis 14,
And a trapezoidal body (11) extending in the longitudinal direction (L), the trapezoidal body having a threaded eye (15) arranged to receive a warp yarn (16) (15)
The threaded eye 15 is delimited by two threaded supporting surfaces 25 located at a distance from each other on the pulsed body 11 in the longitudinal direction L, Extending between the first lateral surface 33 and the second lateral surface 34 of the body 11,
Each thread support surface 25 has a first flat surface portion 42 and a second flat surface portion 43 that are connected to each other by a bent portion 44 such that there are no steps or edges, ). The method according to claim 1,
Characterized in that the curvature (1 / r3) of the central bend (44) is constant in the warp direction (F). 3. The method according to claim 1 or 2,
The threaded eye 15 is further delimited by two bridges 26 extending in the longitudinal direction L of the elongated body 11 and each of the bridges has a flat threaded surface 27 (10). The method of claim 3,
Characterized in that the normal vector (NF) of the thread guide surface (27) is oriented transversely with respect to the warp direction (F) and in the transverse direction (Q) transverse to the longitudinal direction (L) . The method of claim 3,
The longitudinal distance DL of the two bridges 26 measured in the warp direction is the distance 2 measured in the transverse direction Q perpendicular to the warp direction F and perpendicular to the longitudinal direction L. [ Is greater than at least five times the lateral distance (DQ) of the two bridges (26). 3. The method of claim 2,
The width B of the shear 10 on the threaded eye 15 is determined by two bridges 26 measured in the transverse direction Q with respect to the warp direction F and perpendicular to the longitudinal direction L (20) is at most 20% greater than the sum of the thicknesses of the layers (12). 3. The method according to claim 1 or 2,
Each thread support surface 25 is defined by the first transition portion 40 and / or the second lateral surface 34 between the first lateral surface 33 and the first surface portion 42, And a second transition portion 41 between the second surface portions 43. The first thread supporting surface is bent in the warp direction F and the second supporting surface is bent in the warp direction F (10). 8. The method of claim 7,
The end portion 33a of the first lateral surface 33 adjacent to the first transition portion 40 and / or the end 33a of the second lateral surface 34 adjacent to the second transition portion 41, (34a) is at an acute angle to the warp direction (F). 8. The method of claim 7,
The curvature 1 / r1 of the first transition portion 40 and / or the curvature 1 / r2 of the second transition portion 41 is at least one thread guiding region A in the warp direction F Wherein the warp threads (16) in the thread guiding area (A) are movable between the bridges (26) of the threaded eye (15) in the transverse direction (Q). 3. The method according to claim 1 or 2,
The normal vector NA of the first lateral surface 33 and / or the second lateral surface 34 adjacent each of the thread support surfaces 25 is at an acute angle to the warp direction F Characterized by a heald (10). 3. The method according to claim 1 or 2,
The inclination angle? 1 of the first surface portion 42 is adjusted to the warp entry angle? And / or the inclination angle? 2 of the second surface portion 43 is adjusted to the opening- Is fitted to the warp advancing angle (beta) at the shed position. The method of claim 3,
Characterized in that each of the bridges (26) has a flat outer surface (28) on the opposite side of the thread guide surface (27) and the outer surface is oriented parallel to the thread guide surface (27). 3. The method according to claim 1 or 2,
The first lateral surface (33) and / or the second lateral surface (34) are formed at least on the outside of the end-eyelet regions (12) (10). ≪ / RTI > 3. The method according to claim 1 or 2,
Characterized in that the threaded eye (15) is directly delimited by the shear body (11). 3. The method according to claim 1 or 2,
Wherein the heald is a shear of a plastic material.

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