NEEDLE FOR LOOP FORMATION ON A KNITTING OR WARP-KNITTING MACHINE, KNITTING OR WARP-KNITTING MACHINE HAVING A PLURALITY OF SUCH NEEDLES, AND METHOD FOR PRODUCING SUCH A NEEDLE
The invention provides a needle for stitch formation on a knitting or warp-knitting machine, the needle comprising a main body, a needle hook, and a transfer member or tongue member which is movable in the longitudinal direction of the main body relative to the main body and the needle hook and is configured to open and close the needle hook by way of a relative movement with respect to the main body. The needle further comprises a connecting element which engages around the transfer member or tongue member at least along a part of the length of the transfer member or tongue member, such that the relative movement of the transfer member or tongue member with respect to the main body is guided by the connecting element, wherein the connecting element is connected to an upper portion of the main body. The invention additionally provides a knitting or warp-knitting machine comprising a plurality of such needles, and a method for producing such a needle.
The present invention relates to a needle for stitch formation on a knitting or warp-knitting machine, to a knitting or warp-knitting machine comprising a plurality of such needles, and to a method for producing such a needle.
PRIOR ARTThe invention is a further development of German Patent No. 10 2007 039 973 of Aug. 23, 2007, which achieves advantageous control of the opening and closing movement of a longitudinally guided tongue member without the second cam track that is necessary in the case of compound needles. The aim of the patent was to avoid the disadvantages of the latch needle for increasingly small needle pitches, that is to say to demonstrate a needle technology without pivotable latches.
In contrast to the loom method, which was established thousands of years ago and allowed components made of wood, mechanical knit production is based on new materials created in the technical age for precisely controllable knitting elements, on which the last-formed stitches develop. These elements, known as needles, could only be made of metal, so that the development thereof as prior art can be seen in metalworking. Hook needles, also known as bearded needles or warp-knitting needles, appeared for the first time in 1589, followed by the latch needle in 1856 and the compound needle at the beginning of the 20th century.
In particular, it was the latch needle that primarily prevailed for the mass production of knits. The prerequisite for this was hardenable steel, which could only be produced in the required quality from the middle of the 19th century onwards. One advantage with this technology is that the yarn, during stitch formation, inevitably takes on a control function due to the movement of the latch and therefore—patterning effects aside—only one control base has to be provided on the needle. In addition, the pivoting latch needle is designed as a ready-to-install functional unit which can easily be inserted in the machine and replaced by the operator. However, as the speeds of circular knitting machines increase, along with a simultaneous increase in the number of knitting systems, the described advantage proves to be a weak point in terms of production reliability. Therefore, intense consideration has already been given to finding new ways to eliminate mounting-related disadvantages of the pivoting latch. One discovered alternative to latch needle technology is the use of two-part stitch-forming elements in which, by means of the hook part of a knitting or warp-knitting needle, the yarn is in each case moved as a loop through the stitch held at the tip of the complementary element and forms a new stitch, the old stitch being cast off over the head of the needle. Therefore, for special applications, for example in the case of warp-knitting machines with the associated extremely short cycle times, this type of needle could already prevail. The disadvantage of this technology in knitting machines, however, is that, for each element, a separate control cam is necessary for the control base thereof, each of these having to be accommodated in the cam systems. This poses an additional problem for double-faced application with the associated confined cam constructions.
Laid-open specification DE 2241 769A discloses two-part stitch-forming elements which bring about both the phase-wise stopping of the slide by a retaining cam and the stopping by way of a braking effect in the needle channel. To achieve this, however, a considerable length of the slide part is necessary in order to accommodate the stops for the relative movement of the slide with respect to the needle. In addition, the handling in practice for inserting the slide into the machine requires a handleable length of this component. The two-part solution was too complicated for general use and therefore was unable to prevail over the latch needle for a number of decades.
The embodiment described in laid-open specification DE 2245 731A manages without any retaining cam on the slide part, which was already anticipated by the first publication. However, this solution is not suitable for high-performance machines owing to the disadvantages due to the heating caused by the braking effect of the slide.
The common technology of stitch formation by means of latch needles is built on a century-long development time involving many different types of machine. Not as much development time or design effort is available for being able to utilize the advantage of stitch-forming elements without pivoting latches for the varied applications using high-performance machines. This increases the pressure on inventive new developments.
For knitting machines, in order to utilize the advantages of latch needle technology as a functional unit with the advantages of compound needles and at the same time to avoid the disadvantage of having to insert in the machine an additional controlled complementary element of user-friendly size, DE 10 2007 039 973 specifies an oscillating member needle technology, in which the long shank of the slide element is transformed into a mini sinker member that moves back and forth within the needle. Said member on the one hand is moved phase-wise together with the needle and on the other hand is stopped phase-wise in a manner controlled by the machine. From the implementation point of view, longitudinal guidance is always more complicated than a pivot bearing of a component. This would also be the case here with conventional design models: the sinker would have to have a guide projection and be secured laterally by a tongue and groove configuration to prevent it from falling out of the needle shank, which, besides said difficulties in terms of mass production, limits the compactness of the design. The smaller the sinker must be, the more complex the solution compatible with mass production. However, due to the alignment of the movement from the holding state to the movement phase, an approximately massless design of the longitudinal tongue element would be desirable. Given the very small size, the problematic longitudinal mounting is simplified in that a central connecting bracket is provided between the oscillating member and the needle body, which central connecting bracket ensures both the relative movement of the oscillating member with respect to the needle body and also the lateral guidance thereof, as well as that on the sliding surface in the needle. In this way, a mini sinker member that moves back and forth in the needle is achieved in a manner analogous to the latch that pivots up and down, with the important difference of being controlled not by the yarn but rather by the machine.
The central component known from mechanical watchmaking, a mainspring, was the inspiration for a mini connecting bracket between the needle body and the yarn transfer element. This led to unusual types of needles which reduced the longitudinally movable tongue member to a size comparable to the pivoting latch and solved the previous problems of guiding the oscillating member in a straight line. As an important condition for this technology to prevail in practice, this led to functional unit designs that can be produced using less specialized manufacturing methods.
In one type according to the aforementioned patent, the otherwise required high technology is avoided for the guidance of the transfer member, particularly in small configurations. This means as an advantage that the transfer member can easily be mounted with respect to the functional unit, which is also possible using manual procedures without any loss of quality. However, the flat structured transfer member requires lateral shoulders, which in the case of mini components require an additional procedure that is not very simple, and this also applies to the guide depressions on the needle shank. In another type, which is an alternative that is of particular interest for very small needle sizes, the components are somewhat more complicated and the mounting with respect to the functional unit is possible only by hand, which requires skill.
In both types, the phase-wise stopping of the transfer member during stitch formation takes place by means of a retaining balcony, which in the granted patent acts within the needle cam on a stop tooth of the transfer member. However, the use of both types would be possible on a much wider basis if no additional elements were necessary within the cam systems. The machine concepts would then be possible on those of the previous latch needles. This would also enable implementation of the method for double-faced knits. The inwardly tapering knitting systems for the dial exclude further components. In addition, it has proven to be a disadvantage that lint particles can penetrate into the gaps of the components, which lint particles do not remove themselves but rather settle therein and continue to build up. The aforementioned aspects led to the basic concepts on which the present invention is based. They have considerable repercussions on implementation in new machine concepts and have advantages for the production of the knitting elements known as needles.
SUMMARY OF THE INVENTIONThe object of the invention characterized in claim 1 is to provide a needle for stitch formation on a knitting or warp-knitting machine, which needle has a simple, stable and compact structure and can easily be produced. The invention additionally provides a knitting or warp-knitting machine comprising a plurality of such needles, according to claim 11, and a method for producing such a needle, according to claim 17. Preferred embodiments of the invention follow from the dependent claims.
The needle according to the invention for stitch formation on a knitting or warp-knitting machine comprises a main body, a needle hook, and a transfer member or tongue member which is movable in the longitudinal direction of the main body relative to the main body and the needle hook and is configured to open and close the needle hook by way of a relative movement with respect to the main body. The needle further comprises a connecting element which engages around the transfer member or tongue member at least along a part of the length of the transfer member or tongue member, such that the relative movement of the transfer member or tongue member with respect to the main body is guided by the connecting element, wherein the connecting element is connected to an upper portion of the main body.
The connecting element may be a U-shaped connecting element. The transfer member or tongue member may be received in the depression of the U-shaped connecting element. In this case, the U-shape of the connecting element engages around the transfer member. In particular, the connecting element may be designed as a U-shaped bracket.
The needle according to the invention makes it possible for the control function for the opening and closing movement of a transfer member to be brought about outside of the needle movement system. Another advantage is that of being able to influence the positioning of a plating yarn in the needle hook. The structure of the functional unit needle with longitudinally guided transfer member is compact, so that no dirt particles can penetrate into the system. Since the connecting element is provided in such a way that it is connected to an upper portion of the main body, the needle can easily be produced. In addition, the needle has a simple and stable structure.
The longitudinal movement of the transfer member or tongue member in the needle can take place during the needle movement by phase-limited stopping at an engagement element, such as for example a notch or bump, of the transfer member or tongue member outside of the knitting systems by means of retaining blades, which for example are arranged one after the other around a needle cylinder.
In some embodiments, the bearing of a transfer finger of the transfer member or tongue member against the needle hook in the forward direction is obtained by means of a notched-in protrusion on its front section. The transfer finger height is advantageously made larger and more stable by way of a shoulder, and the underside of said transfer finger can additionally be formed for the precise positioning of a plating yarn. This is an important advantage of one aspect of the invention because plating forms the basis for a large number of pattern types. In this case, two different yarns must be supplied separately to the needles, and one as a face yarn must cover the base yarn. This requires precise positioning of the yarns in the needle, and the positioning must be maintained during stitch formation. In experimental trials of various users using the known compound needles, it has surprisingly been found that the reliability in this case is lower than in the case of latch needles. As a consequence, this type of needle was unable to prevail in knitting machines. This shows the uncertainties that are to be expected as the yarn runs in, and also shows how unmanageable small differences play a critical role. It can only be presumed that the tongue shank made wider for mounting purposes is an important feature.
The design option of the widened transfer finger makes it easier to satisfy the high requirement placed on uniform positioning of the separately supplied yarns in the needle hooks.
The connection of the connecting element to the upper portion of the main body, according to the invention, enables easily replaceable needle elements, resulting in types of knitting machines which extend the field of application also to circular knitting machines which produce double-faced knits up to flat-bed knitting machines in versions from coarse to fine.
The transfer member or tongue member of the needle becomes the rod-shaped profile with a compact design which, together with the main body or needle body, forms a prismatic body without interruptions or cutouts which completely fills the needle channel and thus prevents the penetration and settling of dirt particles. The stop tooth on the tongue member within the knitting system and the corresponding retaining balconies can be replaced by measures outside of the knitting systems. Instead of the stop tooth, a narrow retaining notch or alternatively a bump may be provided at the top, in particular right at the very top, in a shank of the transfer member or tongue member, in which notch an engagement unit of the knitting or warp-knitting machine, such as for example the protrusion of a blade section outside of the cam, engages during the downward movement of the needle for closing the needle hook. These blade sections can be supplemented on the cam upper side so as to form a ring around the needle cylinder. These are simple sinker parts which are arranged one after the other in a stop depression of the cam upper side and can be fastened there using known technology, including by gluing. For closing the needle hook, use may be made for example of a second section protrusion which stops the transfer finger on the transfer member or tongue member during the downward movement of the needle. The arrangement enables the easiest implementation of the desired relative movement of the transfer member or tongue member with respect to the needle main body without additional control elements. This enables completely new machine concepts. The transfer member or tongue member becomes a component which is easy to produce and which can then be placed over the needle main body either by handling of the device or in an automatable manner, the connecting element, such as for example an in particular U-shaped connecting bracket, can be introduced thereover, in particular vertically, and for example the limb protruding beyond the tongue member bottom can be fastened in fixing depressions on the needle shank. The stitch-forming function in this case corresponds to that in the described starting patent.
Due to the fact that no retaining balconies have to be provided within the cam systems, the transfer member or tongue member technology can be used more widely. The clear control outside of the cam is particularly important in the case of RR machines, where the dial cams taper rearward.
The invention can in principle be used for all machine variants and is particularly advantageous for very small pitches and very low stitch heights with the aim of achieving tight knits.
In some embodiments of the present invention, the main body has the upper portion, which directly adjoins the needle hook in the longitudinal direction of the main body, a middle portion, which directly adjoins the upper portion in the longitudinal direction of the main body, and a needle base, which adjoins the middle portion in the longitudinal direction of the main body. The needle base may directly adjoin the middle portion in the longitudinal direction of the main body.
The upper portion may have a smaller lateral extension perpendicular to the longitudinal direction of the main body than the middle portion, such that a step is formed between the upper portion and the middle portion. The connecting element may be arranged entirely above the step in the direction from the needle base towards the needle hook.
The middle portion may have a smaller lateral extension perpendicular to the longitudinal direction of the main body than the needle base.
The step may extend perpendicular to the longitudinal direction of the main body.
The relative movement of the transfer member with respect to the main body may take place entirely above the step, that is to say above the step in the direction from the needle base towards the needle hook.
The needle according to the invention may be configured such that the step forms a stop surface for a lower end face of the transfer member. In this case, the relative movement of the transfer member with respect to the main body in the downward direction, that is to say in the direction of the needle base, is limited by the step.
The connecting element may be connected to the upper portion of the main body by a welded connection, in particular a laser-welded connection. This approach enables a particularly simple structure and particularly easy production of the needle. The laser-welded connection can be made using conventional laser welding technology. Welding, in particular laser welding, clearly leaves behind identifiable traces on the finished needle, which make it possible to distinguish such a needle from needles produced by other methods.
The welded connection, in particular the laser-welded connection, may for example be in the form of a weld seam or a spot weld.
The transfer member may have an engagement element for engaging with an engagement unit of the knitting or warp-knitting machine.
The engagement element may be a cutout or a protrusion, in particular a bump, which extends in the direction perpendicular to the longitudinal direction of the main body.
The needle hook may be formed in one piece with the main body. In this case, the main body has the needle hook.
The needle hook may be formed integrally, in particular in one piece, with the connecting element.
The needle hook may have two halves, the two halves being separated from one another at least in some regions by a gap.
The two halves may be completely separated from one another by the gap.
The two halves of the needle hook may be designed such that a needle curvature of each half extends in a plane that is parallel to the plane in which a needle curvature of the needle hook extends.
The gap may lie in a plane or extend in a plane that is parallel to the plane in which the needle curvature of the needle hook extends.
The transfer member may have, at an upper end thereof in the direction from the needle base towards the needle hook, a transfer finger which is configured to open and close the needle hook by way of the relative movement of the transfer member with respect to the main body.
The transfer finger may have an upper portion and a lower portion which directly adjoins the upper portion in the longitudinal direction of the main body.
The upper portion of the transfer finger may have a smaller lateral extension perpendicular to the longitudinal direction of the main body than the lower portion of the transfer finger, such that a step is formed between the upper portion and the lower portion.
The needle may be configured such that the step of the transfer finger forms a stop surface for a lower end face of the needle hook, so that the relative movement of the transfer member with respect to the main body in the upward direction, that is to say in the direction of the needle hook, is limited by the step.
According to a further aspect of the present invention, a knitting or warp-knitting machine is provided, which comprises a plurality of needles according to the invention.
The knitting or warp-knitting machine according to the invention offers the advantageous effects that have already been discussed above in relation to the needle according to the invention.
The plurality of needles may be arranged one after the other in the knitting or warp-knitting machine. The knitting or warp-knitting machine may comprise exclusively needles according to the invention.
The knitting or warp-knitting machine may further comprise an engagement unit for engaging with engagement elements of the transfer members of the needles.
The engagement unit may have a plurality of protrusions and cutouts which are arranged in an alternating fashion along the direction along which the plurality of needles are arranged one after the other in the knitting or warp-knitting machine.
The protrusions and cutouts may each extend in a direction that is substantially perpendicular to the arrangement direction of the needles and/or substantially perpendicular to the longitudinal direction of the main bodies of the needles.
The engagement unit may have a retaining rocker. The engagement unit may be a retaining rocker.
The knitting or warp-knitting machine may further comprise a rotatable needle cylinder having a knock-over edge, the plurality of needles being arranged in the needle cylinder.
The knitting or warp-knitting machine may further comprise retaining elements, in particular in the form of a spring ring coil, which engage from behind the needles into needle gaps that exist between the needles, said retaining elements forming with respect to the knock-over edge a gap which allows newly formed stitches to slip through and which, when the needles move further forwards, stops the stitches at the knock-over edge.
The retaining elements, in particular the spring ring coil, may be rotatably mounted such that the retaining elements, in particular the spring ring coil, can be rotated together with the needle cylinder. In particular, the retaining elements, in particular the spring ring coil, may be rotated together with the needle cylinder due to the fact that they engage in the needle gaps.
According to a further aspect of the present invention, a method for producing the needle according to the invention is provided, which comprises the following steps: providing the main body, the needle hook, the transfer member and the connecting element, and connecting the connecting element to the upper portion of the main body such that the connecting element engages around the transfer member at least along a part of the length of the transfer member. The method according to the invention offers the advantageous effects that have already been discussed above in relation to the needle according to the invention.
The connecting element may be connected to the upper portion of the main body by welding, in particular laser welding.
The connection of the connecting element to the upper portion of the main body may be carried out by conventional laser welding technology.
The welding process, in particular the laser welding process, may be carried out in such a way that the welded connection, in particular the laser-welded connection, is for example in the form of a weld seam or a spot weld.
Exemplary embodiments of the invention will be explained with reference to
In the figures:
The following functions are obtained as a needle passes through the knitting system:
In
During the further rotation of the cylinder towards
Between the diagrams shown in
On the left-hand side in
In
In
In
By pulling the needle 1 further back as shown in
In
In the face of tough global competition, now only a few needle manufacturers remain that can satisfy the increasing requirements in terms of precision. By constantly evolving and following the impetus of other technologies, a needle concept of exceptional construction has been created, the implementation of which has barely nothing in common with established procedures. The basic concept here is a needle which consists of two functional sections, these being combined by laser technology. This has led to generic needles which in family groups can significantly reduce stock levels. Associated with this are new ways of producing needles, which may even encourage newcomers to investigate these since mastery of the previous production methods is not a prerequisite. Different stitch formation sections can be applied to a needle main body which can be inserted in the machine in the known manner. Over the long time taken to develop various knit applications, various textile machine concepts have been created in which the invention can play a central role.
One embodiment of a needle according to this new technology is shown in
The stop aperture 44 may be configured such that it limits the relative movement of the transfer member or transfer tongue 43 with respect to the main body in the upward or forward direction, that is to say in the direction of the needle hook, and/or in the downward or backward direction, that is to say in the direction of the needle base. This limitation takes place by way of an interaction between the stop aperture 44 and the retaining tooth 45.
The needle hook therefore has two halves, the two halves being separated from one another by a gap.
Intense consideration of the opportunities and risks of the aforementioned technology based on lateral thinking was the reason for identifying further advantageous applications that should not be swept under the carpet. The following further embodiments are the result of the extension.
In flat-bed knitting machines, the transferring of stitches to other needles is an important possibility for creating varied patterns. To solve this problem, complicated transfer needles were created for the existing technology, in which the acceptor needle is inserted laterally into a widened portion of the stitch on the donor needle and thus stitch transfer takes place when the donor needle is pulled back.
On the right-hand side in
The retaining rocker 50 may be provided continuously over the entire length along which the needles are arranged.
The pivoting movement of the retaining rocker 50 is synchronized with the up-and-down movement of the needles.
In
The controlled inward pivoting of the retaining rocker 50 is an analogous procedure during the upward movement of the needle bar B.
One interesting further development is to configure the retaining rocker in a lamellar fashion so as to influence the stitch formation for desired patterns by means of control magnets on individual needles.
All the needle embodiments described thus far are based on production technology that has been formed and further improved over decades. In the face of tough global competition, only a few needle manufacturers remained that could satisfy the increasing requirements in terms of precision. By constantly evolving and following the impetus of other technologies, a needle concept that is exceptionally easy to produce has been created, which has been shown in
Claims
1. A needle for stitch formation on a knitting or warp-knitting machine, the needle comprising:
- a main body,
- a needle hook,
- a transfer member which is movable in a longitudinal direction of the main body relative to the main body and the needle hook and is configured to open and close the needle hook by way of a relative movement with respect to the main body, and
- a connecting element which engages around the transfer member at least along a part of a length of the transfer member, such that the relative movement of the transfer member with respect to the main body is guided by the connecting element,
- wherein the connecting element is connected to an upper portion of the main body.
2. The needle according to claim 1, wherein:
- the main body has the upper portion, which directly adjoins the needle hook in the longitudinal direction of the main body, a middle portion, which directly adjoins the upper portion in the longitudinal direction of the main body, and a needle base, which adjoins the middle portion in the longitudinal direction of the main body,
- the upper portion has a smaller lateral extension perpendicular to the longitudinal direction of the main body than the middle portion, such that a step is formed between the upper portion and the middle portion, and
- the connecting element is arranged entirely above the step in the direction from the needle base towards the needle hook.
3. The needle according to claim 2, wherein the needle is configured such that the step forms a stop surface for a lower end face of the transfer member, so that the relative movement of the transfer member with respect to the main body in the direction of the needle base is limited by the step.
4. The needle according to claim 1, wherein the connecting element is connected to the upper portion of the main body by a welded connection.
5. The needle according to claim 1, wherein the transfer member has an engagement element for engaging with an engagement unit of the knitting or warp-knitting machine.
6. The needle according to claim 5, wherein the engagement element is a cutout or a protrusion which extends in a direction perpendicular to the longitudinal direction of the main body.
7. The needle according to claim 1, wherein the needle hook is formed in one piece with the main body or the needle hook is formed integrally with the connecting element.
8. The needle according to claim 1, wherein the needle hook has two halves, the two halves being separated from one another at least in some regions by a gap.
9. The needle according to claim 1, wherein the transfer member has, at an upper end thereof in the direction from the needle base towards the needle hook, a transfer finger which is configured to open and close the needle hook by way of the relative movement of the transfer member with respect to the main body.
10. The needle according to claim 9, wherein:
- the transfer finger has an upper portion and a lower portion which directly adjoins the upper portion in the longitudinal direction of the main body,
- the upper portion of the transfer finger has a smaller lateral extension perpendicular to the longitudinal direction of the main body than the lower portion of the transfer finger, such that a step is formed between the upper portion and the lower portion, and
- the needle is configured such that the step of the transfer finger forms a stop surface for a lower end face of the needle hook, so that the relative movement of the transfer member with respect to the main body in the direction of the needle hook is limited by the step.
11. A knitting or warp-knitting machine comprising a plurality of needles, each of the needles including:
- a main body,
- a needle hook,
- a transfer member which is movable in a longitudinal direction of the main body relative to the main body and the needle hook and is configured to open and close the needle hook by way of a relative movement with respect to the main body, and
- a connecting element which engages around the transfer member at least along a part of a length of the transfer member, such that the relative movement of the transfer member with respect to the main body is guided by the connecting element,
- wherein the connecting element is connected to an upper portion of the main body.
12. The knitting or warp-knitting machine according to claim 11, further comprising an engagement unit for engaging with engagement elements of the transfer members of the needles.
13. The knitting or warp-knitting machine according to claim 12, wherein the engagement unit has a plurality of protrusions and cutouts which are arranged in an alternating fashion along the direction along which the plurality of needles are arranged one after the other.
14. The knitting or warp-knitting machine according to claim 13, wherein the protrusions and cutouts each extend in a direction that is substantially perpendicular to the arrangement direction of the needles and/or substantially perpendicular to the longitudinal direction of the main bodies of the needles.
15. The knitting or warp-knitting machine according to claim 12, wherein the engagement unit has a retaining rocker or the engagement unit is a retaining rocker.
16. The knitting or warp-knitting machine according to claim 11, further comprising:
- a rotatable needle cylinder having a knock-over edge, the plurality of needles being arranged in the needle cylinder, and
- retaining elements which engage from behind the needles into needle gaps that exist between the needles, said retaining elements forming with respect to the knock-over edge a gap which allows newly formed stitches to slip through and which, when the needles move further forwards, stops the stitches at the knock-over edge,
- wherein the retaining elements are rotatably mounted such that the retaining elements can be rotated together with the needle cylinder.
17. A method of making a needle including:
- a main body,
- a needle hook,
- a transfer member which is movable in a longitudinal direction of the main body relative to the main body and the needle hook and is configured to open and close the needle hook by way of a relative movement with respect to the main body, and
- a connecting element which engages around the transfer member at least along a part of a length of the transfer member, such that the relative movement of the transfer member with respect to the main body is guided by the connecting element,
- wherein the connecting element is connected to an upper portion of the main body, the method comprising:
- providing the main body, the needle hook, the transfer member and the connecting element, and
- connecting the connecting element to the upper portion of the main body such that the connecting element engages around the transfer member at least along a part of the length of the transfer member.
18. The method according to claim 17, wherein the connecting element is connected to the upper portion of the main body by welding.
Type: Application
Filed: Aug 31, 2017
Publication Date: Sep 12, 2019
Inventor: Ulrich HOFMANN (Albstadt)
Application Number: 16/330,013