CN110158214B - Method for operating a spinning station on a ring spinning machine after a doffing operation - Google Patents
Method for operating a spinning station on a ring spinning machine after a doffing operation Download PDFInfo
- Publication number
- CN110158214B CN110158214B CN201910114501.5A CN201910114501A CN110158214B CN 110158214 B CN110158214 B CN 110158214B CN 201910114501 A CN201910114501 A CN 201910114501A CN 110158214 B CN110158214 B CN 110158214B
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- CN
- China
- Prior art keywords
- yarn
- cop
- drafting device
- ring
- thread
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
- B65H67/08—Automatic end-finding and material-interconnecting arrangements
- B65H67/081—Automatic end-finding and material-interconnecting arrangements acting after interruption of the winding process, e.g. yarn breakage, yarn cut or package replacement
- B65H67/085—Automatic end-finding and material-interconnecting arrangements acting after interruption of the winding process, e.g. yarn breakage, yarn cut or package replacement end-finding at the take-up package, e.g. by suction and reverse package rotation
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
- D01H1/14—Details
- D01H1/38—Arrangements for winding reserve lengths of yarn on take-up packages or spindles, e.g. transfer tails
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/04—Guides for slivers, rovings, or yarns; Smoothing dies
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/32—Counting, measuring, recording or registering devices
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing
- D01H15/013—Carriages travelling along the machines
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
- D01H5/005—Arrangements for feeding or conveying the slivers to the drafting machine
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H9/00—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine
- D01H9/02—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing completed take-up packages and replacing by bobbins, cores, or receptacles at take-up stations; Transferring material between adjacent full and empty take-up elements
- D01H9/04—Doffing arrangements integral with spinning or twisting machines
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
- Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
Abstract
A method for operating a spinning station on a ring spinning machine after a doffing operation is described, the spinning station having a spindle, a ring traveler, a thread guide and a drafting device assigned to the spindle. The method comprises the method steps of detecting yarn breaks at the spinning station after the doffing operation, moving the maintenance vehicle to the spinning station and correcting the yarn breaks. In so doing, before correcting the yarn break by the maintenance truck, checking the amount of yarn on the cop, if there is too little yarn on the cop to guide the yarn to the drafting device and attach the yarn thereto, cleaning the cop and attaching the yarn to the empty cop, guiding the yarn to the drafting device and attaching the yarn thereto via the maintenance truck and the ring traveler and the yarn guide; if there is enough yarn on the cop to guide the yarn to the draft device and attach the yarn at the draft device, the yarn is guided to the draft device and attached there via the maintenance car and the ring traveler and the thread guide.
Description
Technical Field
The invention relates to a method for operating a workstation on a ring spinning machine after a doffing process, a maintenance vehicle and a ring spinning machine.
Background
As is well known, there are operating robots and maintenance carts that attach the thread after a thread break has been present on the ring spinning machine. Mention should be made here in particular of the handling robot from EP394671 A2. The operating robot moves along a row of spinning stations, detects a broken thread and then tries to correct any broken thread thus detected. In so doing, the belt driving the spindle is first lifted from the spindle via a special spindle brake and then the spindle is stopped. In addition, an auxiliary wire is used. One end of the auxiliary wire is attached to a winder which moves around the spinning head, thereby winding the wire around the cop. The auxiliary thread is then threaded through the ring bead and the thread guide and introduced into the region of the outlet of the drafting device. The spindle and thus the cop is then also driven again and the auxiliary yarn is brought into the path of the drafted roving, so that the auxiliary yarn is twisted together with the roving.
However, if a yarn breakage occurs after doffing, there is a disadvantage in that the yarn on the sleeve is too small to successfully perform the spinning start when the maintenance vehicle is attempting to correct the yarn breakage. This may result in the yarn being inadvertently drawn off the sleeve by the yarn seeking mechanism. After the line search, the yarn layer remaining on the sleeve is so small that there is a risk that the yarn layer is displaced or pulled out due to the pulling during the spinning start.
Disclosure of Invention
The object of the present invention is therefore to achieve a method and a maintenance vehicle which will eliminate the breakage after the doffing process, so that the yarn is not displaced or pulled on the cop.
This object is achieved by a method having the features of the basic solution of the present application.
This object is achieved in particular by a method according to the present application, which is characterized in that the amount of yarn on the cop is detected before the break is corrected by the maintenance vehicle, and
-if there is not enough yarn on the cop to guide and attach the yarn to the drafting device, removing the yarn from the cop and attaching the yarn to the empty cop, and the maintenance car together with the collar steel traveler and the yarn guide the yarn to the drafting device at which the yarn is attached; and
-if there is enough yarn on the cop to guide and attach the yarn to the drafting device, the maintenance car together with the collar steel traveler and the thread guide the yarn to the drafting device and attach there.
This method advantageously makes it possible to prevent the automatic spinning start from failing due to too little yarn on the sleeve. Thus, the efficacy and accuracy of the process is increased. For example, a broken thread may be detected by a separate spindle monitor or a separate spindle driver for the spindle.
Although this method can in principle be performed as a standard process during the whole spinning cycle, it is advantageously possible that it is performed only at the start of spinning (i.e. when at most the first three layers are applied to the cop). A time limit of, for example, two to five minutes is also conceivable.
The amount of yarn on the cop is advantageously checked by calculating the amount of yarn wound onto the cop, in particular by calculating the amount of yarn based on the time the spindle has been running and calculating the amount of yarn associated with the point in time of the yarn break. For example, the amount of yarn may be calculated from the delivery of the yarn (in meters per minute (m/min)) and/or determined by a sensor.
The cleaning of the cop by suction can be advantageously accomplished by using a yarn search mechanism that allows for thorough and rapid cleaning of the cop.
Furthermore, it is advantageously possible to decide whether there is sufficient yarn on the cop based on the control of the maintenance vehicle. Thus, the maintenance vehicle can operate autonomously. In another embodiment, it is also possible that the spinning machine controller makes a decision and sends the information to the maintenance vehicle.
After the doffing process has continued the spinning process with an empty cop and no ring bead movement has been detected, it is also advantageously possible to attach the thread directly to the empty cop and to guide the thread through the ring bead and the thread guide via the maintenance vehicle to the drafting device where it is attached. Basically, a check is performed here to determine whether the thread has been clamped into the clamping crown, i.e. whether a thread break has occurred before doffing.
The invention also relates to a maintenance vehicle for carrying out the method described above, characterized in that the maintenance vehicle comprises a controller designed to: determining if there is sufficient yarn on the cop and if there is too little yarn on the cop to guide the yarn to and attach the yarn at the drafting device, clearing the cop and attaching the yarn to the empty cop and guiding the yarn to and attaching the yarn at the drafting device through the ring traveler and the wire guide via the maintenance cart; and if there is enough yarn on the cop to guide the yarn to and attach the yarn at the draft device, guiding the yarn to and attaching the yarn at the draft device through the ring traveler and the wire guide via the maintenance car. The controller of the maintenance vehicle is advantageously designed to calculate the amount of yarn on the cop (i.e. the yarn that has been wound onto the cop) and in particular to calculate the amount of yarn during the period of time that the spindle has been running and to determine the yarn quantity in relation to the point in time of the yarn break.
The maintenance trolley advantageously comprises means for positioning the end of the thread and for suction removal of the thread, as well as means for attaching the thread to the empty cop.
The invention also relates to a ring spinning machine with a corresponding maintenance vehicle.
Drawings
Additional advantages of the invention are described in the following embodiments, in which,
fig. 1 schematically shows a ring spinning machine with a maintenance cart; and
fig. 2 shows a flow chart of the method according to the invention.
In the different figures, identical features are labeled with identical reference numerals.
Detailed Description
Fig. 1 schematically shows a ring spinning machine 1 having a plurality of spinning stations 2 arranged side by side. The spinning station 2 is located at a head 3 arranged in the longitudinal direction x of the ring spinning machine 1 1 And a base 3 2 Between them. Head 3 of ring spinning machine 1 1 And a base 3 2 Bearings, drives, controllers, etc. necessary for the operation of the spinning machine may be included. As can also be seen on two spinning stations 2, which are schematically shown for example in fig. 1, each spinning station 2 comprises a roving bobbin 4 which is located above a drafting device 5 and onto which the roving 6 is wound. The roving 6 extends from the roving bobbin 4 onto the drafting device 5 and is then guided by a thread guide to a yarn forming element, where it is drafted. The turned bead winds the completed yarn around the cop 7. Cop 7 is placed on spindle 8. The maintenance trolley 9 moves along the ring spinning machine 1, in the event of a thread break, travels to the respective spinning station and automatically corrects the thread break. The individual spinning stations 2 may be equipped with spindle monitors or other sensors for monitoring the ring travelers to detect broken threads. Alternatively or additionally, the spinning station 2 may be equipped with a separate spindle drive.
Fig. 2 shows a flow chart of the method according to the invention. The method involves the process of starting the spinning station 2 on the ring spinning machine 1 after the doffing operation. During doffing by a doffer (not shown), full cop 7 is removed from spindle 8 and empty cop 7 is placed on spindle 8.
In a first method step 10, after doffing, the spindle 8 with the empty cop 7 is restarted.
In a second method step 20, it is determined that a thread break has occurred at the spinning station 2 after doffing via a separate spindle motor or another separate yarn monitoring. In the case of individual spindle drives of spindles 8, it can be determined that a wire break already exists, for example, based on torque or other available data. In principle, the method can be performed as a standard during the whole spinning cycle. However, it is also advantageously possible to perform the method only when starting the spinning, i.e. when winding up at most the first three layers onto the cop 7. For example, a time limit of the first 2 minutes to 5 minutes is also conceivable. The maintenance trolley 9 is then moved to the spinning station 2 for the purpose of eliminating the breakage.
In a third method step 30, a check is performed as to whether a thread is present at the spinning station 2. It is basically conceivable that no thread is clamped in the clamping cap, i.e. that a thread break has occurred before or during doffing. Based on the data on whether any signal from the ring bead has been detected, the following decision is made: whether the sixth method step 60 should be started (option: left); or whether a break is to be eliminated by starting the spinning via the maintenance trolley 9 and the reattachment of the thread. In this case the method proceeds to a fourth step 40 (option: right). The basic check can be performed by a higher-level spinning machine controller or in the controller of the maintenance vehicle 9.
In a fourth method step 40, a check is performed to determine if the yarn length on the cop is sufficient for the yarn to be guided from the cop 7 by the maintenance car 9 through the ring bead and the line guide to the drafting device 5 and to attach the yarn at the drafting device. The amount of yarn of the cop 7 can be advantageously checked by calculating the amount wound onto the cop 7 by the spindle 8. For example, the amount of yarn may be calculated from the delivery of the yarn (in meters per minute (m/min)) and/or detected by a sensor and then determined. Thus, for example, the amount of yarn can be calculated based on the length of time during the operation of the spindle and the number of yarns associated with the point in time of the yarn break. If there is not enough yarn on the sleeve, the method continues with a fifth method step 50 (left branch). If there is sufficient yarn on the sleeve, the method continues with a seventh step 70 (lower branch).
In a fifth method step 50, the cop is cleaned to remove the (residual) yarn present thereon. The cop is cleaned via a suction device, which is on the maintenance vehicle and guided along the surface of the cop. Such a cleaning device is known, for example, from unpublished PCT application PCT/IB 2017/057254.
In a sixth method step 60 of the method, the thread is attached to the empty cop by a maintenance car, and in a seventh step 70 of the method, the maintenance car attaches the thread by guiding the thread to the drafting arrangement via the ring bead and the thread guide. At the drafting device, the yarn is attached to the available fibre material before or after a pair of output rollers of the drafting device in the transport direction of the fibre material. Such a spinning start-up procedure by means of a maintenance vehicle is known, for example, from EP0388938 A1.
In an eighth and final step 80 of the method, the spindle is caused to rotate again and the spinning process is restarted.
List of reference numerals
1. Ring spinning machine
2. Spinning station
3 1 Head of ring spinning machine 1
3 2 Base of ring spinning machine 1
4. Roving bobbin
5. Drafting device
6. Roving yarn
7. Cop yarn
8. Spindle
9. Maintenance vehicle
10 method steps: starting after doffing operation
20 method steps: detection of broken wire
30 method steps: checking whether the bead ring signal has been detected
40 method steps: checking whether the yarn length is sufficient
50 method steps: cleaning yarn from cop
60 method steps: attaching a thread to an empty cop
70 method steps: attachment cycle with maintenance vehicle
80 method steps: starting of spinning process
Longitudinal direction of x-ring spinning machine 1
Claims (16)
1. Method for operating a spinning station (2) on a ring spinning machine (1) after a doffing operation, wherein the spinning station (2) has a spindle (8), a ring traveler, a thread guide and a drafting device (5) assigned to the spindle (8), and the ring spinning machine (1) has a maintenance vehicle (9) and a doffer, the method comprising the following method steps:
-continuing the spinning process with an empty cop (7) at the spinning station (2) after the doffing operation;
-detecting a thread break at the spinning station (2);
-the maintenance trolley (9) moves to the spinning station (2) and eliminates the breakage;
-continuing the spinning process in question,
it is characterized in that the method comprises the steps of,
checking the amount of yarn on the cop (7) before eliminating the breakage by the maintenance vehicle (9), and
-if too little yarn is present on the cop (7) to guide the yarn to the drafting device (5) and attach yarn at the drafting device, cleaning the cop (7) to remove yarn and attach yarn to the empty cop (7) and guiding the yarn to the drafting device (5) and attach yarn at the drafting device by the ring and the wire guide via the maintenance car (9); and
-if there is enough yarn on the cop (7) to guide the yarn to the drafting device (5) and attach yarn at the drafting device, guiding the yarn to the drafting device (5) and attaching yarn at the drafting device via the maintenance car (9) together with the ring traveler and the wire guide.
2. Method according to claim 1, characterized in that the amount of yarn on the cop (7) is checked by calculating the amount wound onto the cop (7).
3. The method of claim 2, wherein the amount of yarn is calculated from the delivery of yarn.
4. A method according to claim 2 or 3, characterized in that the amount of yarn is calculated as a function of the time period during which the spindle (8) is running and the amount of yarn is calculated as a function of the point in time of the break.
5. A method according to any of the preceding claims 1-3, characterized in that the cleaning of the cop (7) is performed by finding the end of the yarn on the cop and applying suction.
6. A method according to any of the preceding claims 1-3, characterized in that the method for operating the spinning station (2) on a ring spinning machine (1) after the doffing operation is performed after doffing, unless more than three yarn layers are present on the cop (7).
7. A method according to any of the preceding claims 1-3, characterized in that a thread break has occurred at the workstation just before, during or after doffing.
8. A method according to any of the preceding claims 1-3, characterized in that the decision whether there is sufficient yarn on the cop (7) is made based on the controller of the maintenance vehicle (9).
9. A method according to any of the preceding claims 1-3, characterized in that the broken thread is determined by a single spindle driver of the spindle.
10. A method according to any of the preceding claims 1-3, characterized in that after continuing the spinning process with an empty cop (7) after the doffing operation but no ring bead movement is detected, a thread is attached to the empty cop (7) and the thread is guided to the drafting device and at the drafting device via the maintenance car (9) together with the ring bead and thread guide.
11. Maintenance vehicle (9) for performing the method according to any of the preceding claims 1 to 10, characterized in that the maintenance vehicle (9) comprises a controller designed to: determining if there is sufficient yarn on the cop (7), if there is too little yarn on the cop (7) to guide the yarn to the drafting device (5) and attach yarn at the drafting device, cleaning the cop (7) and attaching a wire to the empty cop (7), and guiding the yarn to the drafting device (5) and attaching yarn at the drafting device through the ring and wire guide via the maintenance car (9); and if there is sufficient yarn on the cop (7) to guide the yarn to the drafting device (5) and attach it at the drafting device, guiding the yarn to the drafting device (5) and attaching it at the drafting device via the maintenance car (9) together with the ring bead and the wire guide.
12. Maintenance vehicle (9) according to claim 11, characterized in that the controller is designed to calculate the amount of yarn wound onto the cop (7).
13. Maintenance vehicle (9) according to any of claims 11 or 12, characterized in that means are provided for finding the thread end and for suction removal of the yarn.
14. Maintenance vehicle (9) according to any of claims 11 or 12, characterized in that means are provided for attaching the thread to an empty cop (7).
15. Maintenance vehicle (9) according to claim 11, characterized in that the controller is designed to calculate the amount of yarn during the time period in which the spindle has been running and to calculate the number of yarns in relation to the point in time of the break.
16. Ring spinning machine (1) having a maintenance vehicle (9) according to any of the preceding claims 11 to 15.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH00187/18 | 2018-02-16 | ||
| CH00187/18A CH714658A1 (en) | 2018-02-16 | 2018-02-16 | Method for operating a spinning station of a ring spinning machine after a Doffvorgang. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110158214A CN110158214A (en) | 2019-08-23 |
| CN110158214B true CN110158214B (en) | 2023-05-30 |
Family
ID=65243376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910114501.5A Active CN110158214B (en) | 2018-02-16 | 2019-02-14 | Method for operating a spinning station on a ring spinning machine after a doffing operation |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3527703B1 (en) |
| CN (1) | CN110158214B (en) |
| CH (1) | CH714658A1 (en) |
| ES (1) | ES2930815T3 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0525719A (en) * | 1991-04-19 | 1993-02-02 | Murata Mach Ltd | Operation of robot for double twister |
| JPH08157137A (en) * | 1994-12-01 | 1996-06-18 | Murata Mach Ltd | Residual yarn removing device |
| CN103526367A (en) * | 2013-10-15 | 2014-01-22 | 王玥 | Spinning frame yarn clearing device |
| CN203439845U (en) * | 2013-08-08 | 2014-02-19 | 青岛环球集团股份有限公司 | Bobbin preventing roving shedding |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1183207A (en) * | 1966-03-10 | 1970-03-04 | Kanegafuchi Spinning Co Ltd | An Improved Apparatus for Exchanging Bobbins in Textile Machine |
| IT1006331B (en) * | 1974-02-11 | 1976-09-30 | Montefibre Spa | YARN BREAK DETECTOR DEVICE IN TOI IRONERS AND YARN |
| IT1047692B (en) * | 1975-10-03 | 1980-10-20 | Cognetex Spa | AUTOMATIC TROLLEY DEVICE FOR SEARCHING AND REFITTING OF BROKEN WIRES IN RING THREADERS |
| IT1223526B (en) * | 1987-12-18 | 1990-09-19 | Savio Spa | PROCEDURE AND DEVICE FOR WINDING WIRE ON A TUBE WITHOUT WIRE NECESSARY FOR AUTOMATIC REFITTING IN A RING THREADER |
| DE3932666C2 (en) * | 1989-03-22 | 2000-12-28 | Rieter Ag Maschf | Method for operating a spinning machine, in particular a ring spinning machine, and operating robots for carrying out the method |
| DE4119381A1 (en) * | 1991-06-12 | 1992-12-17 | Zinser Textilmaschinen Gmbh | Ring spinning frame - has uncomplicated robotic mechanism to spin on following yarn break |
| CH684098A5 (en) * | 1991-08-09 | 1994-07-15 | Rieter Ag Maschf | Method and apparatus for creating a underwinding of predetermined wrap angle on the spindle shaft of a spinning or twisting machine. |
| DE19916270A1 (en) * | 1999-04-12 | 2000-10-19 | Schlafhorst & Co W | Automatic winder for cross wound bobbins monitors yarn available at cops for cop change before bobbin doffing if supply drops below given level to reduce machine stoppages |
| EP2110470B1 (en) * | 2008-04-15 | 2013-03-13 | Maschinenfabrik Rieter Ag | Spinning machine with individual spindle drive |
| CN202401196U (en) * | 2012-01-11 | 2012-08-29 | 王建波 | Device for automatically detecting broken end and jointing end of spun yarns |
| DE102013021316A1 (en) * | 2013-12-16 | 2015-06-18 | Saurer Germany Gmbh & Co. Kg | Method for operating a winding machine and winding machine |
| DE102015108740A1 (en) * | 2015-06-02 | 2016-12-08 | Rieter Ingolstadt Gmbh | Method for operating a spinning machine with work-station-own handling organs for re-spinning a thread and spinning machine with work-own handling organs |
| JP2017172096A (en) * | 2016-03-21 | 2017-09-28 | プレミア・エボルビクス・プライベイト・リミテッドＰｒｅｍｉｅｒ Ｅｖｏｌｖｉｃｓ Ｐｖｔ． Ｌｔｄ． | Method for automatically detecting yarn breakage and spindle defect, and robot for restoring the same |
-
2018
- 2018-02-16 CH CH00187/18A patent/CH714658A1/en not_active Application Discontinuation
-
2019
- 2019-01-29 ES ES19154142T patent/ES2930815T3/en active Active
- 2019-01-29 EP EP19154142.4A patent/EP3527703B1/en active Active
- 2019-02-14 CN CN201910114501.5A patent/CN110158214B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0525719A (en) * | 1991-04-19 | 1993-02-02 | Murata Mach Ltd | Operation of robot for double twister |
| JPH08157137A (en) * | 1994-12-01 | 1996-06-18 | Murata Mach Ltd | Residual yarn removing device |
| CN203439845U (en) * | 2013-08-08 | 2014-02-19 | 青岛环球集团股份有限公司 | Bobbin preventing roving shedding |
| CN103526367A (en) * | 2013-10-15 | 2014-01-22 | 王玥 | Spinning frame yarn clearing device |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3527703B1 (en) | 2022-08-24 |
| CH714658A1 (en) | 2019-08-30 |
| CN110158214A (en) | 2019-08-23 |
| EP3527703A1 (en) | 2019-08-21 |
| ES2930815T3 (en) | 2022-12-22 |
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