EP0158324A1 - Yarn package carrier - Google Patents

Abstract

The invention relates to a winding support for the treatment of threads or yarns. The winding support should have two end rings and a plurality of elements which form intermediate rings which form an openwork jacket ring as a whole. The elements mentioned can also be parts of at least one helix. Spacers arranged in the jacket ring are provided for connecting the elements mentioned in the axial direction. Such a winding support should form a stable support for the winding of untreated winding material, have openings as large as possible for a dyeing liquor and avoid jamming of threads of the winding material. For this purpose, it is provided that the elements forming the intermediate rings alternately have larger and smaller diameters in the axial sequence.

Description

• 1. winding carrier for the treatment of threads or yarns with two end rings and a plurality of intermediate rings forming a perforated jacket ring elements, which can also be parts of at least one coil, these elements are provided in the axial direction connecting spacing elements arranged in the jacket ring, characterized that the elements forming the intermediate rings (9-12, 14, 11 ', 11' ', 12', 12 '') alternately have larger and smaller diameters in the axial sequence.
• 2. winding carrier at least according to the preamble of claim 1, characterized in that the envelope surface enveloping the winding carrier (18,19) and / or the envelope (16,17) cylindrical, conical, biconical and / or corrugated or consists of a combination of these shapes .
• 3. winding carrier according to at least one of claims 1 and 2, characterized in that the winding carrier has in the axial direction at least one group of intermediate rings forming elements, the elements (12 ", 11 ') have at least approximately the same diameter with each other.
• 4. winding carrier at least according to claim 3, characterized in that at least on one side of each group at least one element (10, 11, 11 ', 11' ') is arranged, the diameter of which is greater than the diameter of the elements (12, 12', 12 '') of the group.
• 5. winding carrier according to at least one of claims 1 to 4, characterized in that the relatively larger in diameter to the elements of a group elements (11, 11 ', 11 ") have at least approximately the same diameter with each other.
• 6. winding carrier according to at least one of claims 1 to 5, characterized in that all the elements forming the intermediate rings (9-12, 11 ', 11' ', 12', 12 '', 14) are dimensioned in their diameter so that they follow an envelope (16, 17) assigned to the respective group of elements.
• 7. winding carrier according to at least one of claims 1 to 6, characterized in that at least the Elements (11, 11 ', 11'') forming intermediate rings, the circumferences of which lie on the most radially outer envelope (16), have at least partially molded-in hollow bodies which are open at least on one side.
• 8. winding carrier according to at least one of claims 1 to 7, characterized in that at least the elements forming the intermediate rings (12, 12 ', 12' '), the circumferences of which lie on the most radially inward envelope (17), compared to the axially adjacent elements are supported by rigid, axially arranged spacer elements (3,3 ', 7,8).
• 9. winding carrier according to at least one of claims 1 to 8, characterized in that the elements forming the intermediate rings (9-12, 11 ', 11' '. 12', 12 '', 14) can have different thicknesses, the thicker elements (14) can have openings (15) running from the inside to the outside.
• 10. winding carrier at least according to claim 9, characterized in that the thicker elements (14) are designed as an annular body with an inwardly and / or externally open U-shaped cross section.
• 11. Winding support according to at least one of claims 1 to 10, characterized in that the elements (9) forming the intermediate rings have mutually supporting spacer elements (1, 2) on their radially outer side a groove (13).
• 12. winding carrier according to at least one of claims 1 to 11, characterized in that the spacer elements (1-8,3 ', 5', 6 ') in the axial direction soft, rigid or can be differently soft or rigid at different axial locations.
• 13. Winding support according to at least one of claims 1 to 12, characterized in that the spacer elements in the region of the intermediate rings (12, 12 ', 12' ') with a smaller diameter in the axial direction have a higher resistance to deformation than the other spacer elements.
• 14. Winding support according to at least one of claims 1 to 13, characterized in that the spacer elements (1-8, 3 ', 5'6') are arranged offset from one another at least in the axial sections in the circumferential direction.

Winding carrier

The innovation relates to a winding support for the treatment of threads or yarns with two end rings and a plurality of intermediate rings forming a perforated jacket ring elements, which can also be parts of at least one coil, these elements are provided in the jacket ring connecting spacing elements arranged in the axial direction.

Winding carriers of the type described above are widely used and have proven their worth. Depending on the application, different requirements are placed on such winding carriers with regard to the space available for the winding material. During the treatment of the winding material on the winding carrier, the winding material exerts a force on the winding carrier, for example by a shrinking process of the winding material, and the winding carriers of the prior art are designed in such a way that they can yield to such a force that occurs. At the same time, however, such winding carriers must also have as many and large openings as possible, so that the dyeing liquor for coloring the material to be wound can penetrate the winding carrier flowing out of the dye spear from the inside to the outside as freely as possible.

Since the winding material behaves differently during the treatment on the winding carrier depending on the type of winding material and the treatment, winding carriers of the most varied constructions have become known which compensate for the narrowing winding material in the axial direction or in the radial direction or in both directions are deformable. As an example of this, reference is made to DE-AS 2 363 250. However, there is a risk that threads of the material to be wound will become jammed if the winding support is deformed, even when it is being wound. To prevent this, a such winding carrier always used wrapped with paper in practice.

Furthermore, DE-PS 2 506 512 has disclosed a winding carrier which does not belong to the type defined in more detail above, but which has a winding body with bulges, between which there are depressions and which should be at least axially deformable. With this winding support, it is possible that when the winding material shrinks due to a wet treatment or due to a heat treatment, this winding material can initially sit in the recesses in the radial direction, so that space is gained without deformation of the winding support. However, if there is simultaneous axial deformation of this winding carrier, on the one hand the introduction of the winding material into the recesses is promoted and on the other hand the winding material is clamped in the recesses. At the same time, the perforation, which for reasons of stability makes up only a small proportion of the total surface area in the sum of its opening cross sections, impedes the passage of the dye liquor.

The innovation is therefore based on the task of proposing a winding carrier of the type described at the outset, which is a stable carrier for the winding of the untreated winding material, has the largest possible openings for the dyeing liquor and in which the threads of the winding material do not become jammed.

According to the innovation, this object is achieved in the case of a winding carrier of the type described in the introduction in that the elements forming the intermediate rings have larger and smaller diameters, alternating in the axial sequence. It has been shown that the material to be wound can easily be wound over the larger diameters. Since the structure of the winding support described on the one hand represents a stable core and on the other hand because of the only If the narrow, rounded end faces of the individual elements of the dyeing liquor do not provide any appreciable resistance, the desired properties of sufficient stability and low resistance for the dyeing liquor are also achieved. The described sequence of the diameters of the elements forming the intermediate rings creates sufficient space in the radial direction and in the axial direction between the elements with larger diameters, which form the winding core of the untreated winding material, in which the winding material in response to a wet or warm treatment can sit down. Depending on the dimensioning of this free space and the size of the shrinkage of the winding material, this can even make a deformability of the winding carrier in the axial or radial or in both directions superfluous.

According to an embodiment of the innovation, it is proposed that the outer surface enveloping the winding support and / or the enveloping consist of cylindrical, conical, biconical and / or corrugated or of a combination of these shapes. In this embodiment, the term “lateral surface” represents the generatrix running in the axial direction, which would produce the surface contour of the winding carrier when rotated about the longitudinal axis. In contrast, the term “envelope” describes the area that is generated by a generator, which is placed over the radially outermost points of the winding carrier, when it is rotated about the longitudinal axis of the winding carrier. In this way it is possible to create zones with different space in the axial direction on one and the same winding carrier while maintaining all previous advantages. It is therefore possible, particularly in the case of an insignificantly deformable winding carrier, to achieve all the other advantages by selecting those shapes which correspond to the space requirement of the winding material to be treated in the individual case and to pinch threads of the winding material prevent.

A further embodiment of the innovation provides that the winding body has at least one group of elements forming intermediate rings in the axial direction, the elements of which have at least approximately the same diameter as one another. This group formation enables the size of the empty spaces and the size of the outer winding surface with which the winding carrier comes into contact with the material to be wound to be varied and determined directly.

Another embodiment of the innovation provides that at least one element is arranged on at least one side of each group, the diameter of which is larger than the diameter of the elements of the group. In this way, a safe winding core is achieved with the largest possible empty space.

Another refinement of the innovation in turn provides that the elements which are larger in diameter relative to the elements of a group have at least approximately the same diameter as one another. In this way, the available area of the winding core can be varied on the one hand, and at the same time, both the shape of the enveloping surface and the shape of the envelope can be varied as desired, without fear of the threads of the winding material being pinched ought to.

Another embodiment of the innovation provides that all the elements forming the intermediate rings are dimensioned in such a way that they follow an envelope assigned to the respective group of elements. Since the elements forming the intermediate rings must have different diameters, they can be divided into different diameter groups, each of which then an envelope can be assigned. This envelope then determines the diameter of the elements forming the intermediate rings and its change in the axial direction of the winding carrier. It is then possible to describe the structure of the winding carrier and to specify the position and size of the empty spaces by specifying the course of the envelopes to be assigned to each group. A winding carrier constructed in this way also reliably prevents the threads of the winding material from being trapped.

A supplementary embodiment of the innovation provides that at least the elements forming the intermediate rings, the circumferences of which lie on the most radially outer envelope, have at least partially molded-in hollow bodies which are open at least on one side. In this way, while maintaining all previous advantages and avoiding pinching, it is possible to make the winding support radially flexible at least in the area of the outer winding core. Despite this radial flexibility, which creates additional scope for the winding material to become narrower, the threads of the winding material are reliably prevented from jamming. It is thus possible to adapt to different requirements of the winding material while avoiding the risk of getting caught.

Also according to an embodiment of the innovation, it is provided that at least the elements forming the intermediate rings, the circumferences of which lie on the most radially inward envelope, are supported with respect to the axially adjacent elements by rigid, axially arranged spacer elements. In this way, deformability in the axial direction is prevented, at least for the further back and thus space-creating part of the winding carrier, so that this intermediate space remains with certainty always open, thereby reliably preventing the threads from being wound.

Another refinement of the innovation in turn provides that the elements forming the intermediate rings can have different thicknesses, wherein the thicker elements can have breakthroughs running from the inside to the outside. In certain cases, this can mean a simplification of production and, at the same time, produce a desired stability in the axial direction at the points thus produced, which, however, remains restricted to the respectively assigned axial regions.

Another embodiment of the innovation in turn provides that the thicker elements are designed as an annular body with a U-shaped cross section that is open inwards and / or outwards. In this way, with basic axial stability, an axial deformation in the respective edge regions is nevertheless possible on a small scale. With this, too, a special adaptation to special needs of special winding material qualities is achieved while avoiding the risk of the threads of the winding material becoming trapped.

Another embodiment of the innovation provides that the spacer elements forming the intermediate rings have a groove on their radially outer side. This is a particularly simple means of creating the desired pinch-free space for the winding material.

It is also proposed according to an embodiment of the invention that the spacer elements can be soft, rigid in the axial direction or differently soft or rigid at different axial locations. As a result, while maintaining all previous advantages A wide variety of requirements for the deformability of the winding support can be met and at the same time it is possible to prevent the threads of the winding material from being pinched.

In a further embodiment of the innovation, it is also proposed that the spacer elements in the area of the intermediate rings with a smaller diameter have a higher resistance to deformation in the axial direction than the other spacer elements. This enables the entire winding support to be deformed axially, which, however, assumes different orders of magnitude depending on the axial position. In particular, this design ensures that the free spaces remaining for the winding material deform less axially when the winding carrier is axially deformed than the other parts of the winding carrier, so that a desired size of an axial deformation can be achieved with the most economical design and still prevent jamming can.

Finally, according to an embodiment of the innovation, it is also proposed that the spacer elements are arranged offset from one another at least in axial sections in the circumferential direction. In this way too, despite the avoidance of the danger of being trapped, a winding carrier is created which is both axially and radially deformable and inevitably also undergoes radial deformation when it is axially deformed.

The design options described above show that the innovation has succeeded in proposing a winding carrier in which the pinching of threads of the winding material is reliably prevented and which can nevertheless be designed in such a way that their deformability meets all special requirements of the different meets the highest winding quality. At the same time, an almost unhindered passage of the dyeing liquor, as is already known from other winding carriers of the prior art, is made possible.

The innovation will now be explained with reference to the accompanying drawings, which show various exemplary embodiments.

• Figur 2 schematisch Wickelträger in Seitenansicht
• Figur 3 ausschnittsweise Längsschnitt eines Wickelträgers in Sonderform
• Figur 4 schematisch Längsschnitt eines Wickelträgers in Sonderbauart
• Figur 5 axiales Teilstück eines Wickelträgers in Seitenansicht, zwei Varianten ineinandergezeichnet

FIG. 1 shows an axial section of a winding carrier in a side view with different design in sections

• Figure 2 schematically side view of the winding carrier
• 3 shows a section of a longitudinal section of a winding carrier in a special form
• Figure 4 schematically shows a longitudinal section of a winding carrier in a special design
• Figure 5 axial section of a winding carrier in side view, two variants drawn into each other

FIG. 1 shows a side view of a piece of a winding support according to the invention in the axial direction, in which different design variants are drawn one inside the other. As a result, a large number of individual representations can be avoided. It is a winding carrier of the generic type, in which elements forming intermediate rings in axial order — which can also be parts of helices — which, for simplification, are only referred to as intermediate rings in the text below, provided with the reference numerals 10, 11, 12 and 14, follow one another. Viewed from top to bottom, an intermediate ring 10 is initially arranged, which is followed by an intermediate ring 12 with a smaller diameter. This smaller intermediate ring 12 again follows e-in intermediate ring 10. This is now followed by an intermediate ring 11 which is larger in diameter. The intermediate ring 12, which is smaller in diameter, is held at a distance from the adjacent intermediate rings 10 by a spacer element 5 '. Spacer 5 'is designed so that the intermediate rings 10 can move towards the intermediate ring 12 in the axial direction against a certain resistance. In order to enable this axial movement of the intermediate rings, the spacer element 5 'could of course also have all other shapes and arrangements already known in the prior art and suitable for this purpose. The outer boundary surface 21 of the spacer elements 5 'is grooved or rounded, so that a free space 20 is thereby formed in the circumferential direction of the intermediate rings 10-12-10 and their spacer elements 5'.

The second intermediate ring 10 seen from above is followed by an intermediate ring 11, which in turn is followed by an intermediate ring 10. The successive intermediate rings 10 - 11 - 10 are in turn held at a distance by spacing elements 7 which are distributed in the circumferential direction and which are arranged as flat plates and one below the other. Here, the outer boundary surface 22 of these spacer elements 7 is arched outwards in the exemplary embodiment, but any other lines can also be provided. This also applies to the corresponding lines of the other spacer elements. This shape of the spacer elements ensures axial rigidity. However, it is generally sensible if the spacer elements are designed to be axially flexible in this area, while, in the reverse sequence as shown in FIG. 1, the spacer elements 5 'are expediently rigid or at least more rigid than the spacer elements 7 in the axial direction.

The outer contour formed by the diameter of the intermediate ring 11 and the outer boundary surface 22 of the spacer elements 7 serves as a winding core on which the inner threads of the winding material come to rest.

The intermediate ring 11 following the intermediate ring 11 is followed even further inward by a group of two intermediate rings 12 which have the smallest diameter and, like the first intermediate ring 12 shown above, lie on the innermost envelope 17, while the diameter of the intermediate rings 11 is on the outer envelope 16 lies.

The two intermediate rings 12 arranged side by side in the axial direction are rigidly supported in the axial direction by spacer elements 3, so that these two intermediate rings 12 arranged side by side in the axial direction cannot move towards one another in the axial direction. A minimum distance of the free space 20 'is thus ensured in order to prevent the threads of the winding material from becoming trapped.

The support between an intermediate ring 12 and the adjacent intermediate ring 10 in the axial direction, however, takes place via spacer elements 8, which are designed as tubular hollow bodies in the exemplary embodiment, so that axial flexibility is achieved here. The size of this flexibility depends on the shape and wall thickness of these spacer elements 8. This type of construction can, in cooperation with the group of intermediate rings 10 - 11 - 10 arranged axially above it, which are held rigidly to one another in the axial direction, exert a certain desired pushing effect upon axial deformation via the spacer elements 8, which the threads of the winding material caused to dive into the free space 20 '. Here, the rigid in the axial direction trained spacer elements 3 between the intermediate rings 12 so that this area remains undeformed in the axial direction and therefore, as already described, a minimum clearance is ensured.

Another modification follows the part described so far. The lower intermediate ring 10, which still cooperates with the spacer elements 8, is followed in turn by two intermediate rings 11 in the axial direction downward, the outer circumferences of which again lie on the envelope 16. These two intermediate rings 11 are mutually rigidly supported in the axial direction via spacer elements 8 ', this group of the two intermediate rings 11 rigidly supported in the axial direction being supported upwards and downwards relative to the adjoining intermediate rings 10 via spacer elements 7 which are likewise rigid in the axial direction . Such a structure is of course not limited to two intermediate rings of the same diameter. This design enables the width of the winding core to be changed and the width of the winding core to be coordinated with the size of the free spaces 20 and 20 ', as a result of which the security against jamming can be further improved. In particular, it is possible to install deformation elements, such as the hollow bodies designed as spacer elements 8, in the intermediate rings 10 and / or 11, so that these intermediate rings can thereby be deformed in the radial direction. If these elements are installed in the intermediate rings 11, the winding core can be reduced as such (the envelope 16 can move radially inwards), or the free space 20 ¹ can be increased by the corresponding radial deformation of the intermediate ring 10. If, in combination, an adjacent intermediate ring 10 is equipped with such hollow bodies and at the same time this intermediate ring 10 is compared to the neighboring intermediate ring 12 with a smaller diameter supported such hollow body-like spacer elements 8, it can be possible to keep the size of the free space 20 'constant despite the axial approach of the spacer ring 12 and spacer ring 10 due to the radial deformability of the spacer ring 10. For this purpose, however, it is then necessary to ensure that the spacer elements 7 also permit such radial deformation of the intermediate ring 10. The options described last are not drawn separately, however, because the previous description in connection with the components already described for FIG.

Further down to the part of FIG. 1 described so far, the intermediate ring 10 is followed by a thicker element 14 which acts as an intermediate ring and which is completely rigid in the axial direction and thus determines a minimum size of the free space 2011. The circumference of this thicker element 14 again lies on the envelope 17. So that the passage of the dye liquor is not hindered, this thicker element 14 has openings 15 directed from the inside out for the passage of the dye liquor.

A winding support of the type described is not only producible for envelopes 16 or 17 of cylindrical shape. Rather, the envelopes can take any shape. For example, a structure of such a winding carrier is shown schematically in FIG. 2, in which the envelopes 16 and 17 are tapered in a parallel position to one another and the intermediate rings 11 ', 12' are only indicated. However, it is also in no way imperative that the envelopes 16 and 17 are arranged parallel to one another, rather these surfaces can also converge or diverge, so that viewed in the axial direction, such a winding support has a different deformation behavior in each axial zone can have, whereby a precise adaptation to the special properties of the particular winding material to be wound can take place.

It is also possible, as already described for FIG. 1, to construct the winding carrier differently in different axial regions of the winding carrier, as is shown diagrammatically in FIG. 1. However, a structure of the winding carrier which is periodically repeating in the axial direction is equally possible and generally expedient. As already described, the various construction options allow adaptation to the various requirements of the winding material and yet reliably avoid the risk of the threads of the winding material becoming trapped.

In addition to FIG. 1, FIG. 3 shows an axial section of a winding carrier cut longitudinally in a central plane. In this example according to FIG. 3, the hatched cutting plane can represent the parting plane of a two-jaw molding tool to be used for the production of such winding carriers. The intermediate rings 12 ″ and 11 ″ can be held at a distance from one another by different spacer elements in the exemplary embodiment, the spacer elements 3 ′, 4 and 5. While the spacer elements 3 'are arranged one below the other in the axial direction and are rigid in this direction, designing the spacer elements in the form of the spacer elements 4 and 5 also allows axial flexibility in an arrangement with one another. In the exemplary embodiment according to FIG. 3, the described spacer elements 3 'and 4 and 5 all have surface lines of the same direction, which run in the direction of the demolding movement of the mold jaws, that is to say perpendicular to the plane of the drawing. In the area of the parting plane, on the other hand, there is an enveloping spacer element 6 that runs from top to bottom Each side is provided, the outer shape of which corresponds to the desired enveloping outer surface 19, as a result of which free spaces 23 can be created here, for example, at periodic intervals. The resulting design for the spacer element 6 ensures that this spacer element 6 in the area of the free space 23, that is to say in the area of the overlap of the intermediate rings 12 ″, has a higher resistance to deformation in the axial direction than in the area bulged outwards, each of which has an intermediate ring 11 "overlaps. In the latter area, the winding carrier is soft in the axial direction. This design also ensures a free space 23 for the material to be wound, despite the axial flexibility, in which threads of the material to be wound cannot be pinched.

However, it is also possible to make a winding support according to FIG. 3 completely rigid in the axial direction. The spacing element 6 lying in the division plane must then be formed in this area according to the shape 6 '. The remaining spacer elements must then be in the same position, arrangement and structure as the spacer elements 3 '. However, it is also possible, despite the formation of the spacer element 6 'in the parting plane, in the planes pivoted by 90 ° to form the spacer elements as spacer elements which are soft in the axial direction, in the manner of the spacer elements 4 and 5, as is indicated in FIG. 3 . As a result, it is possible to produce different deformation resistances in different axial planes, which in turn enables a special adaptation to the requirements of the material to be wound without the risk of the threads of the material to be caught.

A winding carrier according to FIG. 3 can be equipped with ends 24 or 25, as shown in FIG. 4, with which several such winding carriers are on one dye spear attachable and stackable one above the other and can be guided into one another with the assigned surfaces. The part that remains open in FIG. 4 can be the part in which the part according to FIG. 3 is to be inserted. However, such a winding carrier according to FIG. 4 can also be axially deformable and forcibly with the axial deformation by changing the arrangement of the spacer elements 3. The pieces of a winding carrier shown in FIG. 4 show such a possibility of construction. This is based on the sectional plane already described for FIG. 3 and the same arrangement as already described for FIG. 3 is chosen with regard to the surface lines of the spacer elements 3 used in FIG. 4, so that a winding support according to FIG. 4 can also be produced by a two-jaw molding tool.

In order to achieve an axial deformability with simultaneous forced, radial deformation of the winding carrier, as in FIG. 4, only the spacer elements 3 need to be arranged offset from one another in the circumferential direction. In the case of axial deformation, this results in a wave-shaped deformation of the intermediate rings, as a result of which their radial extension is reduced. In the case of axial deformation, a radial deformation is thus also forced at the same time. Nevertheless, the areas of the free spaces 23 in the axial direction have a higher resistance to deformation than the other areas, so that the risk of pinching is eliminated.

It is also particularly advantageous if the arrangement of the spacing elements 3 offset in the circumferential direction is carried out only in groups, as shown in FIG. 4, while the arrangement within the groups is rigidly provided in the axial direction. In this way it becomes possible to have both an axial and a radial one Deform the winding support without changing its clearances and free space sizes in any significant way. The winding carrier then crawls into one another only in its inner area, so to speak.

A particularly simple embodiment is shown in FIG. Spacer rings 9 of the same diameter are provided there, which are kept at a distance from one another in the axial direction via spacer elements 1 and in a variation also shown, via spacer elements 2. The spacer elements 1 and 2 are provided with a groove 13 on their radially outwardly directed end face. In this way, it is possible to create a winding carrier with a particularly simple structure, which in the necessary way opposes a dyeing liquor only very little resistance to penetration, and which, with the grooves 13, can offer sufficient space for shrinking processes for certain winding material qualities with little axial movement. The spacer elements 1 ensure that the winding support is relatively rigid in the axial direction. A variant with the spacer elements 2 makes the winding support more flexible in the axial direction. With an axial deformation of the winding support, it can even be achieved that the intermediate rings 9, which are kept at a distance with the spacer elements 2, simultaneously execute a slight rotational movement relative to one another with their axial movement, thereby promoting a sliding of the threads of the winding material into the grooves 13 becomes.

Overall, the innovation succeeds in proposing winding support constructions which can be adapted to the most varied of deformation requirements and which nevertheless all prevent the threads of the winding material from being pinched and at the same time allow the dyeing liquor to pass through almost unhindered. Despite the latter the advantages mentioned will receive the other advantages of winding supports of the prior art. This also applies to the sufficient guidance of the winding carrier on the dye spear as well as the stackability of several winding carriers on the dye spear. Likewise, winding supports according to the innovation, despite their advantages according to the innovation, can also be produced inexpensively by two-jaw molding tools, which, in addition to all the advantages described so far, can also achieve the advantage of drastically simplifying the manufacturing tools.

List of the reference symbols used

• 1 spacer
• 2 spacer
• 3 spacer
• 3 'spacer
• 4 spacer
• 5 spacer
• 5 'spacer
• 6 spacer
• 6 'spacer
• 7 spacer
• 8 spacer
• 8 'spacer
• 9 elements forming intermediate rings
• 10 elements forming intermediate rings
• 11 elements forming intermediate rings
• 11 'Elements forming intermediate rings
• 11 "elements forming intermediate rings
• 12 elements forming intermediate rings
• 12 'elements forming intermediate rings
• 12 "elements forming intermediate rings
• 13 Grooving
• 14 thicker element
• 15 breakthroughs
• 16 outer envelopes
• 17 inner envelopes
• 18 enveloping surface
• 19 enveloping surface
• 20 free space
• 20 ¹ free space
• 20 '' free space
• 21 outer interface
• 22 outer interface
• 23 free space
• 24 end
• 25 end

Claims (1)

1.

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