CS225791A3 - Process and apparatus for forming a winding of storage end of a textile machine bobbin - Google Patents

Description

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A method and apparatus for forming a coil winding of a textile machine.

Technical field

BACKGROUND OF THE INVENTION The present invention relates to a method for forming a stock end winding for a textile machine spool, wherein a roll of yarn is formed on a spool after wrapping the spool with a fixed length or a specified amount, and the invention also relates to a device for carrying out the method. Furthermore, the invention also relates to a yarn winding tube for coil winding and also for receiving at least one storage end between the end of the tube and the front side of the coil winding and the method for producing the tube.

It is known from DE-OS 17 60 245 to wind a plurality of mutually uniform yarn windings onto the upper ends of the tubes so that the yarn end can be easily found on the spool and caught without any problems. DE-OS 25 06 930 discloses winding the yarn end at the end of the sleeves by means of a suction gripper, after which the textile reel is again rotated in the winding direction and the suction gripper remains at the end of the sleeve. It is known from DE 36 02 574 that, by means of a control unit equipped with a yarn end suction device and a yarn guiding device, the drawn yarn intended to produce the yarn supply is guided by the guide device into the wedge gap between the end face of the sleeve and the front of the coil winding. It is also known in the yarn stocking process that for the first threads of the yarns to be fastened on the sleeves, the first yarns of the yarn are laid below the following yarns and thereby fixed on the sleeve.

The yarn stacks that are located on the smaller diameter cone sleeves have the disadvantage of causing the yarn stock to slip with the reel when handling the reel. Thereby the end of the yarn can be damaged and the advantage of easier finding of the yarn end is completely lost. At = 6 Pi

It is known to deposit markings in the form of flat indentations on the tube. Their task is primarily to prepare the surface of the yarn draw-off tube. However, the flat shape of these indentations can in no way prevent the yarn plug from slipping on the tube. This is also not necessary because the yarn stock then wraps the other threads of the yarn and thereby fastens. SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and apparatus for making conical cavities such that the spool does not impede the acquisition of yarn stock, and also to provide a suitable shape for the yarn storage container of the present invention.

SUMMARY OF THE INVENTION

This object is solved by a method of producing a yarn end stock according to the invention, the principle of which is that upon reaching the specified diameter, the bobbin or the bobbin. The yarn is spun yarn, extends over the jacket surface outside and then back to the jacket surface of the spool.

According to a preferred embodiment of the "method according to the invention", the sleeve surface is supported on the sleeve and again on the cross-shell of the coil, whereby more than one thread of yarn is optionally formed on the sleeve.

A further object of the present invention is achieved by the features of the following claims which provide a preferred particular embodiment of the method according to the invention.

By laying the yarn back on the circumferential surface of the bobbin, it is possible to reliably secure the yarn end. In doing so, the yarn end retains its furry surface on the surface of the coil, so that the expensive devices may be dispensed with and the measures which have yet to be used have not been satisfactory. In the invention, it is sufficient to simply bring the yarn end onto the bobbin. Precise positioning on the spool near the wedge gap between the sleeve and the spool is not necessary. It is particularly advantageous if the yarn end is pressed against its surface of the yarn after its supplying spool surface. This results in an intense contact which ensures the yarn ends on the coil surface by locking the fiber ends into one another. This pressing is done especially easily by porn- $ ló

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For example, during the formation of the yarn feed, the spool is used to drive the spool.

In order to further process the coil, the advantage of the inventor is that the yarn supply can be captured very easily. This advantage is achieved by having the sleeve in contact with at least the yarn storage yarn. Thus, the position of the yarn supply is precisely determined with respect to the sleeve, so that, in particular, the yarn end searching and catching can be carried out automatically. Particularly advantageous is the possibility of depositing the yarn on a well-defined hollow seat, this possibility being possible, for example, by forming a groove in the hollow. Yarn searching and yarn acquisition is also possible on the bobbin surface of the bobbin by the inventive method, since the yarn end abuts the bobbin surface.

Particularly preferred is an embodiment of the method according to the invention, in which the yarn is held in a tensioned state as it is so since the tensioned yarn comes into contact with the surface of the bobbin in its entire length. If the yarn is kept in tension, the yarn supply on the bobbin is also formed in a tensioned state. A well-off yarn supply resists slipping on the tube. A further advantage of forming the winding of the method of the invention is that a substantial portion of the yarn stock can be deposited on the spool surface so that no space is required to form the yarn stock. The risk of slipping of the yarn with the sleeve is less, the less yarn is deposited on the sleeve. When storing a smaller number of turns, it is easier and faster to catch the yarn stock and to increase the safety stability without substantially slipping the yarn stock. Another advantageous embodiment of the method according to the invention is that the yarn for producing the yarn stock is guided by a pre-duct with the coil surface of the coil parallel to the bobbin edge. This prevents loss of tension in the yarn on the bobbin, which would otherwise release the yarn stock and release it from the tube. Especially preferred is a parallel spacing from the coil edge so that the yarn cannot slip with the coil. and? g-: í '• Λ i -. »t <' ον-Λ; ·., '^' 1 - Í.-1. ! .''and:'

According to a further preferred embodiment of the process according to the invention, the yarn stock bobbin stops, but a particularly economical embodiment of the method according to the invention presupposes the formation of a yarn stock without stopping the rotation of the bobbin or the bobbin. For this purpose, the yarn may preferably be guided by a yarn guide or a yarn distributor for normal winding. It is particularly suitable to use the device according to DE 37 34 478 A1. The yarn is separated after the yarn stock has been formed.

By using a tube according to the invention, it is possible to form a stock in such a way that the stock of yarn formed is perfectly secured prior to collection with the tube. The construction of the tube according to the invention is particularly advantageous for conical sleeves, in which case the yarn supply is formed, in particular, on the sleeve part by a smaller diameter, where there is a considerable risk of slipping and loosening of the yarn package. This release. the embodiment of the invention can be easily avoided by using a groove. This diameter change form is most preferred because it does not prevent rolling of the cavity on the friction roll. Particularly preferred is a circumferential groove along the entire circumference of the cavity, since this makes it possible to achieve the greatest possible spacing between the bottom of the groove and the circumference of the cavity. The yarn stack placed in the circumferential groove can then only fall out of the groove with a considerable length extension. However, since such extensions are practically not possible, the yarn is reliably secured in the groove in this section. Thus, the yarn supply can be firmly held on the tube because the other threads keep the threads under tension. Further preferred embodiments of the sleeve according to the invention are set forth in the further claims. Drawing Overview:

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a finished wound conical bobbin of the present invention; FIG. 2 is a front view of the bobbin of FIG. Fig. 4 is a side view of a winding point according to the invention; Fig. 5 is a front view of the winding point of Fig. 4; Fig. 7a is a side view of the end of a conical shaped tube having a smaller diameter in which the area between the circumferential groove and the coil winding is rewound, Fig. 7b is a side view of the end of the tapered sleeve with obliquely chamfered sides of the circumferential groove, Fig. 8 Fig. 9a shows a longitudinal section through the half of the end of the wedge-shaped groove, and Fig. 9b shows a longitudinal section through the half-end of the cylindrical sleeve. hollows. EXAMPLES OF THE INVENTION

The conical spool of FIG. 1 has a yarn storage stock 51 formed in a known manner at the larger end of its cavity 2, and at its second end, the cavity 2 is provided with a circumferential groove 20 according to the invention which allows the yarn end stock 4 to be formed. this coil 7 is shown in its entire length. After the yarn 3 has been deposited on the tube 2, the yarn feed device 51 is formed, and the yarn supply 1 is interrupted in a known manner with the winding station stop. serving the stopped winding point, for example by means of a carriage for carrying out the reel exchange 2 · For the production of the end stock 4 of the yarn, it is first searched by means of an operating automatic machine, the end of the yarn is stopped at the end of the coil. the yarn 3 and the conical bobbin 1 are removed from its winding location. The conical bobbin according to FIG. 1 is wrapped in the finished state with a yarn end stock 4 with a yarn end 30 and ready to be removed from the winding place.

After locating and catching the yarn 3, the yarn J is first unwound with the conical coil 7 and caught in the suction device. Thereafter, the conical coil 1 starts to rotate in the winding direction without placing further yarns 5 in the cross-windings, since the distribution motion of the distribution device is stopped, so that a plurality of yarn windings 41 are arranged parallel to each other by this precisely. that, when the yarn 3k is made to form the end stock 4, loops may be formed which would be deposited on the tapered coil without the necessary tension. After the mutually parallel wraps 41 are formed, the yarn 6 is fed through the conductor by the conductor 2 side by side over the edge 12 of the conical coil 2, so that upon further rotation of the conical coil 2, the end cap 4 is wound around the tube 2 before it reaches again back to the conical coil 2 »where its jacket surface is wound again * 10. In Fig. 1, the beginning 42 of the mutually parallel ovals is shown. where the yarn is transferred from the normal cross-winding of the parallel-wound 41. The yarn length section 43 is guided to the edge 12 of the conical bobbin from parallel to each other.

The end 30 of the yarn 3, after being brought back to the edge 12 of the tapered spool 1, extends to the tapered spool housing surface 10 and is deposited thereon. In this case, the end portion 310 of yarn 3 is supported on the jacket surface 10 of the conical coil 2, wherein the firm hold is provided by the hairiness of the yarn 3. The particular surface area of the conical coil 1 is equally hairy, there is no risk that the end 30 of the yarn 3 or its end section 310 has been separated from the jacket surface. The yarn end stock 4 of yarn 3 is thus secured against slipping with the surface of the sleeve 2. In the course of forming the yarn end stock 4 and of the yarns 41, the yarn 3 is kept under tension until it is re-applied to the surface 10 of the conical coil. If the yarn supply end 4 is stored at least, with minimal tension, its releasing from the tube 2 is completely reliably prevented.

The yarn end stock 4 is positioned on the tube 2 in a completely accurate and stable position. Position stability can be achieved simply by the circumferential groove 20. By this unambiguous delimitation of the yarn end stock 4, both the manual and the automated search and capture of the yarn end 30 can be reliably and reliably assisted in the further processing of the spool coil.

Next to the yarn end stock 4, which is spaced apart from the junction end 120 of the conical coil 1, is the end stock 4 included? the yarn parts that extend from the edge 12 of the conical coil 2 to the back end. 120 of the conical coil V. By means of the roofing, it is considerably easier to collect, in particular, the suction end 4 of the yarn 3 for further processing of the conical coil. - 7 - conical coils 1_ ·

Another measure contributing to the fixed positioning of the yarn end stock 4 is the steep guidance of the length section 45 as far as possible? Also, the ends 30 of the yarn 3 at a steep angle to the edge 12 of the cone to this effect, it is necessary to place the parallel wraps 41 at a greater distance from the edge 12 of the conical coil.

FIG. 2 shows, in a front view, a similar conical coil 1 as FIG. 1, however, unlike the previous example, in which the cone yarn wrapping 3 was less than 360 [deg.], The wrapping of the tube 2 is formed essentially in FIG. 5 times around the circumference of the sleeve 2, the crossing between the descending and falling portions of the yarn end stock 4 is necessary as shown in FIG. 2. The end 30 of the yarn 3 mounted on the circumferential surface of the conical coil 7 winds the tapered coil 2 in the range of one quarter of its perimeter. By providing a short end 30, a simple release of the yarn end stock 4 is ensured. After the yarn end 30 is securely held at the conical coil 2 by the yarn end end 3, the cone coil 2 circumference is passed over the pressure roller. which presses the yarn 3 onto the circumference of the cone-shaped spindle. Thus, the yarn end 50 'adheres to the surface of the conical coil V and cannot slip. The pressure roller can be provided with a drive roller 5 which rotates the cone 2 during the search for the end 30 of the yarn 3.

Fig. 3 shows a front view of a conical coil 2 in which the yarn end supply 4 is guided over the edge 12 of the sheath surface 10 back to the sheath surface 10 of the conical coil | 2 without touching the tube 2. In this method of forming the end piece 4, it is preferred to use the same. it is possible to produce the yarn supply 31 and the yarn end stock 4 on the same side of the tube 2 without interfering with each other. The end stock 4 of yarn 3 can also be formed if the sleeve 2 does not protrude at all or protrudes only slightly over the end face of the tapered element. If the tube 2 permits it, the yarn end cap 4 may touch it or even partially wrap it. í i-i? 'and

FIG. 4 shows a winding place 11 for carrying out the method according to the invention, in which the tapered bobbin is supported in two holding coil arms 110 by which the tapered bobbin 1 is moved away from the friction roller 111 in its stopping. 112 does not feed any yarn. In order to carry out the process according to the invention, the operating automaton 6, which travels along a series of winding points 11, has been brought into operation before the winding station VI. The dispenser 6 is provided with a yarn searching device on a stopped conical coil 2, a device for driving the spool coil, and a yarn laying device for a conical coil, 2 &quot; The desired yarn length or desired amount of yarn is automatically brought to the desired position before the take-up point 11 by the service machine 6 and the tapered bobbin is lifted from its normal binder, which is a friction roller 111 and also serves to store the yarn on the conical bobbin In order to form a yarn end stock by means of the operating automaton 6, the end of the yarn wound on the peripheral surface of the conical bobbin must first be detected. This is done by assigning to the conical head 2 a drive device in the form of a drive roller 51 ', by means of which the reversing machine 6 can control the rotation of the conical coil 1 in both directions of rotation. Subsequently, or at the same time, the jacket surface of the conical coil V is placed in front of the operating automaton 6 towards the yarn end searching device. The device is a pneumatic suction nozzle 65j which approaches close to the shell surface of the conical coil and starts to suck its surface. The suction nozzle 65 is designed so as to be able to suction the entire width of the conical coil 7. During the suction of the jacket surface of the conical coil 7, the conical coil 1 is held in a rotary motion by means of the drive pulley 51 of the servicing machine 6. During this rotation, the ends of the nozzle come into the region of the pneumatic suction nozzle 65 and are in the suction. By means of a control device (not shown) which can be wall-mounted in the air channel of the pneumatic suction nozzle 65, it detects when a sufficient yarn length has been sucked out of the conical coil 1, then the pneumatic suction nozzle 65 is deflected back from the shell surface of the conical coil 7 So that a yarn path 7 is created from the top of the yarn.

, the yarn end of the yarn on the comb surface of the conical coil 7. Thereafter, a predetermined amount of yarn is unwound with the conical spool 7 and the drive roller 51 is stopped. In the following operation, the yarn guide pivot the yarn guide for its guidance during laying, formed in the form of a threaded spindle. The yarn path 7 is selected; such that, after the yarn 5 has been removed to form a yarn supply stock 2, the yarn remains in the region of its conductor. This ensures that the yarn is brought back by its conductor back onto the shell surface of the conical bobbin. It is particularly advantageous to bring the yarn guide tightly onto the surface of the conical bobbin, since the yarn can be more easily pulled back onto the jacket surface. When the yarn guide is brought into the yarn path 7, the drive roller 51 is rotated in the opposite direction, so that the yarn is re-wound to the conical bobbin at the earliest possible time. maintaining the drive roller 51 in a rotational motion in this sense. which must be dependent on the length of the intake section of the yarn, one or more mutually parallel wraps 41 of the example of FIG. 1 are formed on the surface of the conical coil j. it is dependent on how the yarn is held by the pneumatic suction nozzle 65. If the yarn guide is pivoted into the yarn path 7, it can determine the position of the parallel wraps 7.

Upon completion of the parallel-wound formation 41, the yarn guide is brought into motion, so that the yarn is transferred to the edge of the conical coil 7 and allowed to fall on the tube. In doing so, the excess excess yarn is removed from the suction point of the pneumatic suction nozzle 65. Simultaneously with or after this yarn overflow, the conical coil 7 is driven by a drive roller 51 to rotate in the winding direction and, depending on the time of rotation, a larger or smaller yarn end stock is formed.

To bring the yarn back to the shell surface of the conical coil, the yarn guide spindle is rotated in the opposite direction, so that the yarn is guided by the other side of the spindle side through the play of the conical coil 7 on its casing surface. Throughout this process, the yarn is held by the pneumatic suction nozzle 65 in a tensioned state, wherein the rotating cone 7 of the septa, previously sucked into the pneumatic suction nozzle 65, is placed on the conical coil. If it is to be achieved that as little as possible is deposited on the jacket surface of the conical coil 1, the yarn can be cut. By further rotating the conical coil 7 by means of the drive roller 51, the yarn end is covered by other coils and thereby secured to the conical coil 1. Securing the yarn end can also be accomplished by lowering the conical coil onto the friction roller 111, which replaces the conical coil J. After the end stock has been formed, the conical bobbin can be removed by means of an interchangeable carriage, to replace the bobbins or the machine 6 and replace it with a new blank tube.

FIG. 5 shows a front view of the assignment of the pneumatic suction nozzle 65 and the spindle to the conical coil. Asymmetric solution of the pneumatic suction nozzle 65 achieves the yarn being brought into the region of the spindle 66 so that it can after swiveling into: the yarn path 7, the drawn yarns receive the drawn yarn which protrudes from the longitudinal slot of the pneumatic suction nozzle 65. The pressure of the end of the yarn by means of a suitable arrangement of the drive roller 51 or sufficient displacement of the yarn end by means of a spindle 66 yarn, decaying. the pulley 51 »

FIG. 6 shows an exemplary embodiment of a tube 2 according to the invention, which in this example is designed as a conical flange cavity 2. At its larger diameter end, the tube 2 is provided with a yarn storage mark 25 and a smaller diameter at its end. the tube 2 is provided with a diameter change formed in the form of a circumferential groove. This end is also provided with a flange for better threading of the yarn during further processing of the bobbin. For better removal, the region of the flange 26 is formed such that the yarn can slide the end of the sleeve 2 with less friction. In paper tubes 2, it is possible to make the treatment by grinding the surface surrounding the circumferential groove around the side. In order to facilitate the guiding of the end yarn stock into the circumferential groove, the sleeve according to the invention is additionally provided with a particularly high surface quality in the region between the circumferential groove and the location of the individual threads of the yarn. friction reduction. In this way, it is ensured that the yarn end stock is simply secured in the circumferential groove area. If it is a void; j;

11 and 2 in the area between the circumferential groove and its end face, the surface is reduced to reduce friction, there is no risk that the end yarn reserve would form outside the circumferential groove. The yarn end can not be released from the sleeve over time and move towards the front end with the loss of tension at the same time, so that there is no risk of loosening the end yarn end stock.

FIG. 7a shows the end of the tapered sleeve 2 which, in addition to its first end, provided with a yarn for easier removal of the yarn to reduce the coefficient of friction, is provided at the end of the yarn stock, also in the region of of the second end with a surface treatment or surface treatment to reduce the friction between the surface and the yarn. By this measure, the effect of the circumferential groove is significantly enhanced and contributes to the safe deposition of the yarn end stock. The surface area of the tube 2 is shown in a hatched area. Also in this case it is possible to achieve a low coefficient of friction, for example in the case of paper cavities 2 by grinding the peripheral surface of the cavity 2. A low coefficient of friction coefficient is achieved by allowing a low friction coil coil to be applied after the yarn has been brought from the jacket surface. transferring the tension in the yarn along the taper of the tapered sleeve 2 in the direction of the circumferential groove and transferring the yarn along this slightly toward the longitudinal saddle 2 to the inclined surface into the circumferential groove, and this solution does not limit the later release of the end stock.

FIG. 7b shows a smaller diameter conical sleeve, wherein the tapered sleeve in this case is not a flanged sleeve. In this example, the tapered sleeve 2 is provided in the region of depositing the end yarn supply with a circumferential groove 20 according to the present invention on its side facing the end of the tapered sleeve 2, a steeper side, while on the opposite side the circumferential groove 20 is formed by a flat transition into the surface surface of the sleeve 2. By means of this seaming of the circumferential groove 20, the yarn is also easier to store in the circumferential grooves 20 and the yarn end stock are more reliably secured in the circumferential groove area 12 '' - S

20. In addition, the coefficient | friction of the peripheral surface of the end region of the tube 2 by surface treatment or treatment. If a circumferential groove 20 is formed so that its bottom has a higher friction value, then the yarn is at |1 threading the end yarn stock carried by the sleeve 2, so that the individual threads of the yarn end stock are deposited on the cavity of z to 2 with the necessary tension.

FIG. 8 illustrates an embodiment of a cylindrical tube 2 according to the invention, one end of which is beaded and provided with a circumferential groove of the yarn ending stock. Thus, the area between the circumferential groove and the coil winding is provided that the coefficient of friction of the surface of this region is reduced, for example, by regrinding if the coil winding area 2 is opposite to the coil winding region. the area. At the opposite end, the cylindrical tube 2 is provided with a groove marking for storage, an initial reservoir of inlet. From the point of view of purchase costs, it is advantageous to form the tubes 2 in the form of paper tubes in which the circumferential grooves can be formed very simply. When manufacturing the circumferential groove, the cavity is placed on the inner tm and the circumferential grooves are pressed into the peripheral surface of the cavity by a die. Another possibility of forming a circumferential groove is to press the tool into the rotating cone 2 so that the tool rolls over the circumferential surface of the cavity in the location of the circumferential groove. It is particularly advantageous in such a way to form the flange of the sleeve 2 in order that the flange reaches the inside of the sleeve 2 through the peripheral groove.

After the circumferential groove has been formed, the end of the sleeve 2 is ground to reduce the coefficient of friction of its peripheral surface. This additional regrinding of the end of the sleeve reduces the friction value also within the circumferential groove 20, which is advantageous for the yarn to hold the yarn through the end of the yarn stock.

FIG. 9a and 9b show the ends of the tubes 2 in which the circumferential grooves 20 are wedge-shaped, i.e. have a substantially triangular cross-section. The angle of inclination of the flank of the circumferential groove is, in the example of FIG. 15b, smaller than that of FIG. 9a, because the shape of the same triangular cross-section is slightly turned so that the bottom of the circumferential groove extends obliquely below the surface of the cavities. 2. The wedge shape of the circumferential groove 20 allows the yarn to wedge from the yarn end stock to the circumferential groove 20 into the yarn end. the narrow bottom of the circumferential groove 20 and thereby fix it. The wedge groove may also have a symmetrical formation.

The dimensions of the circumferential groove 20 are also selected with respect to the thickness of the yarn end stock. In order to achieve a truly effective wedging of the yarn into the bottom edge, the circumferential grooves must be so deep that several stacked layers of yarn can be placed therein. Therefore, the depth of the circumferential groove 20 is greater than the double of the yarn thickness. Irrespective of the actual depth of the circumferential groove, it is particularly advantageous if the bottom of the circumferential groove 20 is more deeply 0.5 mm from the extension of the circumferential line of the circumferential groove 20. This ensures a trouble-free rolling of the sleeve 2 over the frictional roller.

The yarn end stock can only be secured in its desired position by using the tube 2 of the invention, since the yarn ends are caught on the threads of the yarn that have previously been laid in the circumferential groove 20 and which form the yarn end stock wedged between the sidewalls A further improvement in the holding of the yarn stock is achieved if it is still utilized in accordance with the invention by which the yarn is again brought to the jacket surface of the conical coil 1, 6 '.

Claims (34)

PATENTS - 14 - CLAIMS 1. A method of forming a yarn end stock, in particular on a cross-spool, wherein the yarn is drained off the specified coil diameter or desired amount on the spool with the spool surface and then recycled back to the cross-sectional surface. coils. 2. The method of claim 1, wherein the method of claim 1 is: wherein the yarn is discharged with the coil surface of the coil on the tube and then back onto the jacket surface of the coil. A method according to claim 2, characterized in that the yarn is deposited on the tube in more than one wrap. ··? · Method according to claim 2, characterized in that the tube is wound at a lower wrap angle than | 360 °. | Method according to claim 4, characterized in that the yarn is wrapped at a wrap angle of 180 °. íí A method according to at least one of Claims 1 to 5, characterized in that the yarn is deposited in the end stock into the circumferential groove of the tube for receiving the yarn end stock. Method according to at least one of Claims 1 to 6, characterized in that the yarn brought back to the jacket surface of the bobbin is pressed against the jacket surface by a pressing means. Method according to at least one of Claims 1 to 7, characterized in that the yarn is kept under tension when the supply of yarn is added and / or when the yarn end is deposited on the coil surface. Method according to at least one of Claims 1 to 8, characterized in that the yarn is deposited on a sheath surface in a defined position before being discharged with the coil sheath surfaces. 1 · i i · · ;;; 'and; • -V?; £ '.i: i- • τ · 1' <·, - 15 - Method according to at least one of Claims 1 to 7, characterized in that the yarn is deposited on the jacket surface in a defined position on its back surface when guided on the coil surface. 11. A method according to at least one of claims 1 to 10, characterized in that the yarn is placed parallel to the bobbin edge before it is drawn away from the bobbin surface of the bobbin. Method according to at least one of Claims 1 to 11, characterized in that the yarn is laid at least in the form of a half-turn of the coil parallel to the coil edge. A method according to at least one of claims 1 to 12, characterized in that the coil, upon reaching the required coil diameter or after the desired amount of yarn has been wound up, is stopped to form a yarn end stock. in? 14. Method according to at least one of claims 1 to 12, characterized in that the yarn end stock is formed on a still rotating spool. ; Method according to at least one of Claims 1 to 14, characterized in that the yarn is deposited, after being discharged from the peripheral surface of the coil, into the region of the diameter change of the sleeve. £ 'I Apparatus for carrying out the method according to at least one of claims 1 to 15, comprising a coil holder mounted on the machine frame, b. With coil drive means and means for detecting and retaining the found yarn, that it is provided with a yarn guide (66) extending into the yarn path (7) for removing the yarn (3) from the bobbin (1) by one of its sides and for returning the yarn / 3 / back to the canvas surface / 10 / civ- / ky / 1 / with its other side after the end stock has been created / 4 / "/ / / / / / /. | • r. Apparatus according to claim 16, characterized in that the yarn guide (3) extending into the yarn path (7) is the yarn spindle (66) by changing its rotation. ΐ 16 - Apparatus according to claim 16, characterized in that the yarn guide (3) has a fork shape. Apparatus according to claim 16, characterized in that the yarn guide (3) is a suction nozzle. Device according to claim 19, characterized in that the yarn guide (3) is simultaneously a yarn locating means (3). Apparatus according to at least one of claims 16 to 20, characterized by: that the yarn guide (3) is pivoted into the track (7) of the yarn (3). Apparatus according to at least one of Claims 16 to 21, characterized in that the yarn retaining means (3) is a pneumatic suction nozzle. Apparatus according to at least one of Claims 16 to 22, characterized in that the coil drive means (1) is a drive roller (51) which is adjustable to the coil (1). 24. A conical yarn sleeve, in particular for carrying out the method according to at least one of the claims. 1 to 15, characterized in that it is provided at its narrower end with at least one sudden change in the outer diameter to accommodate the end stock (4) of the yarn (3). 25. A cylindrical tube, in particular for carrying out the method according to at least one of claims 1 to 15, characterized in that it is trimmed at least at one end thereof and is provided on its outer end with an external diameter change for receiving it. Yarn End Stocks / 3 / · A cavity according to claim 24 or 25, characterized in that the diameter change is a groove shape. A female connector according to claim 26, wherein the groove diameter change in the form of a circumferential groove (20) has a steeper inclination on its side facing the end of the sleeve (2) than the gradient of the transition into the surface of the sleeve (2). away from the end of the tube (2). 17 - A female connector according to claim 26 or 27, characterized in that the groove (20) is continuous. The cavity according to at least one of claims 26 to 28, characterized in that the groove (20) is formed by a wedge. 50. The cavity according to at least one of claims 24 to 29, characterized in that it has a low friction value in the region between the groove (20) and the coil winding (1) to facilitate sliding of the end stock (4) of the yarn. / 3 /. A cavity according to claim 50, characterized in that its peripheral surface is ground to reduce friction. A cavity according to at least one of Claims 24 to 31, characterized in that the groove-limiting walls (20) have a greater coefficient of friction than the area between the groove (20) and the coiling region or region at the end of the sleeve / 2 /. A cavity according to at least one of claims 24 to 32, characterized in that the end of the tube (2) is fixed. 34. A cavity according to any one of claims 24 to 33, characterized in that the narrower end of the tube (2) is fixed. A cavity according to claim 34, characterized in that its surface area between the circumferential groove (20) and its end is surface treated to reduce friction. A cavity according to at least one of claims 24 to 35, that is, a paper sleeve (2). A cavity according to at least one of Claims 24 to 36, characterized in that it is provided in accordance with the invention. characterized in that its surface area is treated to reduce the friction value in the area between the circumferential groove (20) and the coil winding area. , ýr 18 A cavity according to at least one of Claims 24 to 37, characterized in that the circumferential groove 12 &apos; &apos; is larger than twice the thickness of the yarn (3) of the wound bobbin (2). y A cavity according to at least one of Claims 24 to 38, characterized in that the circumferential groove (20) has a base deeper than 0.5 mm from the extension of the surface line of the tube (2). Method for producing a core according to at least one of Claims 24 to 39, characterized in that the sudden change in diameter of the core is produced by pressing the rolling roller into the surface of the core. Method for producing a core according to at least one of Claims 24 to 39, characterized in that the circumferential groove is pressed in the circumferential surface of the core. A method for producing a core according to claim 40 or 41. characterized in that its surface is ground and / or varnished to reduce friction values. , · A. A Whether in. '·?