US20230416952A1 - Method for carrying out an automatic can changing process at a spinning station of a spinning machine, and spinning machine and movable can changer - Google Patents

Method for carrying out an automatic can changing process at a spinning station of a spinning machine, and spinning machine and movable can changer Download PDF

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Publication number
US20230416952A1
US20230416952A1 US18/254,081 US202118254081A US2023416952A1 US 20230416952 A1 US20230416952 A1 US 20230416952A1 US 202118254081 A US202118254081 A US 202118254081A US 2023416952 A1 US2023416952 A1 US 2023416952A1
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United States
Prior art keywords
sliver
spinning
spinning station
changer
residue
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Pending
Application number
US18/254,081
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English (en)
Inventor
Michael Ueding
Adalbert Stephan
Sebastian FRITZ
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Publication of US20230416952A1 publication Critical patent/US20230416952A1/en
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    • 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
    • D01H9/005—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 empty packages or cans and replacing by completed (full) packages or cans at paying-out stations; also combined with piecing of the roving
    • D01H9/008—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 empty packages or cans and replacing by completed (full) packages or cans at paying-out stations; also combined with piecing of the roving for cans
    • 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
    • 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
    • D01H9/005—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 empty packages or cans and replacing by completed (full) packages or cans at paying-out stations; also combined with piecing of the roving
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H2700/00—Spinning or twisting machines; Drafting devices
    • D01H2700/21—Piecing or cleaning in spinning mules

Definitions

  • the problem addressed by the present invention is that of providing a method, which improves an automatic can changing process at a spinning machine.
  • An appropriate spinning machine and an appropriate can changer are also to be provided.
  • the spinning stations have a measuring device, by means of which a sliver residue length of the sliver to be spun is ascertainable.
  • a sliver residue length of the sliver, at which an automatic can changing process is to be initiated, is predefinable in the control unit.
  • the sliver residue is removed from, more particularly lifted out of, a sliver guide of the spinning station and disposed of.
  • the removal preferably takes place after the sliver has been separated, although the removal can also take place during or even prior to the ejection of the sliver, depending on the design of the sliver guide and the location of the separation point. The can change is further accelerated as a result. If the sliver guide is openable, the sliver can possibly be removed from the sliver guide even prior to the separation. Otherwise, the removal of the sliver residue preferably takes place after the separation and ejection, since the sliver residue can then be immediately disposed of.
  • the risk of the sliver residue becoming caught on the spinning station or on elements of the can changer is therefore reduced.
  • the sliver residue can be placed in the sliver can to be removed and carried away with the sliver can.
  • the sliver residue can be fed to a suction system of the spinning machine or of the can changer.
  • the can changer includes a handling device for removing sliver residue remaining at the spinning station from a sliver guide of the spinning station.
  • the spinning station continues to run for a while during and possibly also after the separation process, as a result of which the sliver residue to be discharged is kept very short and the downtimes of the spinning station are further reduced.
  • the sliver can is initially pulled by the can changer out of its position underneath the spinning station into a position in front of the spinning station before the sliver is clamped and the sliver is clamped at a front edge of the sliver can facing the spinning station.
  • the clamping point at which the clamp clamps the sliver at the sliver can is therefore situated particularly close to the spinning station, thereby facilitating the formation of a defined and reproducible separation point having a short sliver residue.
  • the can changer more particularly a can gripper of the can changer, preferably includes a fixed clamp for clamping a sliver at the sliver can.
  • the sliver can is removed from the spinning station by the can changer together with the clamped sliver and, as a result, the sliver is separated.
  • the can changing process can be carried out particularly quickly as a result, since the separation of the sliver takes place directly with the exchange or the removal of the sliver can to be exchanged.
  • the can changer includes a movable clamp for separating the sliver. This is required only one time and, as a result, clamping at the individual spinning stations can be dispensed with.
  • an additional fixed or also movable clamp which clamps the sliver in addition to the clamp of the can changer, can also be arranged at the spinning station, however.
  • the sliver residue is removed via suction by means of a suction device of the spinning machine, more particularly a spinning station-specific suction device or a suction device of the can changer or a suction device of a movable service device.
  • a suction device of the spinning machine more particularly a spinning station-specific suction device or a suction device of the can changer or a suction device of a movable service device.
  • the spinning machine and/or the spinning stations include(s) a suction device, by means of which the sliver residue remaining at the spinning station can be removed by suction.
  • a suction device for example, a spinning station-specific suction device is arranged at each of the spinning stations and is connected to a negative pressure channel of the spinning machine, which is present anyway.
  • a suction device that is assigned to multiple spinning stations is also conceivable.
  • the can changer has a suction device for removing by suction the sliver residue remaining at the spinning station after the sliver has been separated.
  • the sliver residues can be advantageously collected separately from other fiber waste from the spinning machine and fed to a separate recycling process.
  • FIG. 1 shows an overview representation of a spinning machine in a schematic front view
  • FIG. 2 shows a schematic side view of spinning station of a spinning machine with a can changer prior to an automatic can changing process
  • FIG. 3 shows the spinning station from FIG. 2 after the clamping of the sliver
  • FIG. 4 shows the spinning station from FIG. 2 after the separation of the sliver according to a first embodiment, which includes a fixed clamp,
  • FIG. 5 shows the spinning station from FIG. 2 after the separation of the sliver according to a second embodiment, which includes an additional movable clamp,
  • FIG. 6 shows a truncated representation of a spinning station after the separation and prior to the ejection of the sliver
  • FIG. 7 shows the spinning station from FIG. 6 during the removal of the sliver
  • FIG. 8 shows the spinning station from FIG. 6 after the ejection of the sliver
  • FIG. 9 shows the spinning station from FIG. 2 during the disposal of the sliver residue according to a first embodiment
  • FIG. 10 shows the spinning station from FIG. 2 during the disposal of the sliver residue according to a second embodiment.
  • the spinning machine 1 also has a movable service device 12 that includes service elements 24 , which can carry out service operations, such as, for example, bobbin changes, cleaning processes, or also piecing processes, depending on the design of the spinning machine 1 .
  • the spinning stations 2 of the spinning machine 1 are preferably designed, however, as at least semi-autonomous spinning stations 2 , which can automatically carry out at least one piecing process.
  • the spinning stations 2 can also be fully autonomous, and therefore a movable service device 12 is not absolutely necessary.
  • the spinning machine 1 shown in the present case also includes a negative pressure channel 22 , which extends along the spinning stations 2 and which is acted upon by vacuum from a central vacuum source 23 .
  • the negative pressure channel 22 can provide the negative pressure for spinning in the case of a rotor spinning machine.
  • Suction devices 19 (see FIG. 10 ) of the spinning machine 1 can also be acted upon by means of the negative pressure channel 22 .
  • the spinning machine 1 can be designed as a rotor spinning machine, and therefore a feeder is provided as a supply device 5 .
  • the spinning machine 1 could also be designed as an air-jet spinning machine, however, wherein the supply device 5 would then be designed as a drafting system.
  • a method is presented for carrying out an automatic can changing process at a spinning station 2 of a spinning machine 1 by means of a movable can changer 14 .
  • the can changer 14 in the present case has a fixed clamp 18 for clamping the sliver 4 at the sliver can 3 , the fixed clamp 18 being arranged at the can gripper in the present case.
  • the fixed clamp 18 is shown in the open state in the present case. Production is preferably still underway at the spinning station 2 at this point in time. Therefore, sliver 4 is still spun during and possibly also after the separation of the sliver 4 , and so only a short piece of sliver residue 21 remains and the downtimes of the spinning station 2 are reduced. It is also possible, however, to first stop the spinning station 2 and only then initiate the can changing process by separating the sliver.
  • FIG. 3 shows the spinning station 2 from FIG. 2 after the clamping of the sliver 4 .
  • the clamp 18 is now shown in the closed state.
  • the sliver can 3 a to be removed has been grasped and initially moved out of its position underneath the spinning station 2 , which is shown in FIG. 2 , into a position in front of the spinning station 2 .
  • the front edge 20 of the sliver can 3 which faces the spinning station 2 , is now also easily accessible, since the spinning can 3 is no longer located underneath the spinning station 2 .
  • the sliver can 3 a to be removed is pulled forward, the sliver 4 is simultaneously laid over the edge or the front edge 20 of the sliver can.
  • FIG. 4 shows the spinning station 2 from FIG. 2 after the separation of the sliver.
  • the sliver can 3 a including the sliver 4 clamped at the front edge 20 of the sliver can 3 a , has been removed from the spinning station 2 and transferred out of the pulled-forward position completely onto the can changer 14 by means of the can gripper 15 .
  • the sliver 4 was separated at the same time due to the movement of the can gripper 15 .
  • the sliver residue 21 remaining at the spinning station 2 is now exposed and can be ejected or removed from the spinning station 2 and disposed of.
  • FIGS. 2 through 4 show a clamp 18 that is arranged at the can gripper 15 .
  • the clamp 18 it would also be possible, however, to arrange the clamp 18 separately at the can changer. It would also be conceivable to arrange a fixed clamp 18 at each spinning station.
  • FIG. 5 shows the separation of the sliver 4 according to a second embodiment, which includes an additional movable clamp 10 , which is also arranged at the can gripper 15 in the present case.
  • an additional movable clamp 10 which is also arranged at the can gripper 15 in the present case.
  • FIG. 5 shows the spinning station from FIG. 2 after the separation of the sliver 4 .
  • the sliver 4 has now been additionally clamped by means of the movable clamp 10 .
  • the sliver 4 is now separated not by moving or removing the sliver can 3 a , which is to be removed, but rather by moving the movable clamp 10 .
  • the movable clamp 10 with the sliver 4 clamped therein, is moved away from the fixed clamp 18 to a certain extent, as a result of which the sliver 4 is separated.
  • FIG. 6 shows the workstation 2 in a truncated representation in a front view, immediately after the separation of the sliver 4 .
  • the sliver residue 21 is still guided in the sliver guide 9 and clamped in the supply device 5 .
  • the supply device 5 can be designed, for example, as a feed roller (not shown), and therefore the sliver residue 21 is clamped between the feed roller and a feed trough (not shown here).
  • the supply device 5 can also be a drafting system (not shown), between the rollers of which the sliver residue 21 is clamped.
  • the spinning device 6 can still be operating and, therefore, at this point in time, the sliver 4 , specifically the sliver residue 21 in this case, is still being delivered into the spinning device 2 in a delivery direction LR by the supply device 5 .
  • FIG. 8 shows the removal of the sliver residue 21 from the sliver guide.
  • the sliver residue 21 is lifted upward out of the sliver guide 9 by means of a handling device 13 , as indicated by the arrow.
  • the handling device 13 is preferably arranged at the can changer 14 , although an arrangement at each of the spinning stations 2 would also be possible, however.
  • the handling device 13 is formed as a lifter.
  • a movable clamp 10 that pulls the sliver residue 21 out of the sliver guide 9 would also be conceivable as a handling device 13 , however.
  • the sliver residue is completely released and can be disposed of, as shown in FIGS. 9 and 10 .
  • the sliver can 3 a has already been pulled out of its position underneath the spinning station 2 into a position in front of the spinning station 2 and transferred onto the can changer 14 .
  • the front end of the sliver can 3 a including the front edge 20 , is still located underneath the spinning station 2 , however.
  • the sliver residue 21 automatically drops into the sliver can 3 a due to gravity and can be carried away together with the empty sliver can 3 a.
  • the sliver can 3 a is still at least partially located underneath the spinning station 2 and can receive the sliver residue 21 in this embodiment of the method, it is also possible in a modification of the order shown in FIGS. 6 through 8 to remove the sliver residue 21 from the sliver guide 9 at an earlier point in time. It would also be conceivable in the case of an openable sliver guide 9 to remove the sliver residue 21 from the sliver guide 9 even prior to the separation. If the handling device 13 is designed as a movable clamp 10 , it would also be possible in the case of a closed sliver guide 9 to remove the sliver residue 21 from the sliver guide 9 even prior to ejection or during ejection.
  • FIG. 10 shows another embodiment of the method, in which the sliver residue 21 is disposed of by a suction device 19 .
  • the sliver residue 21 is lifted out of the sliver guide 9 by means of the handling device 13 and, as a result, transferred into the effective area of the suction device 19 .
  • the handling device 13 can also be provided at the can changer 14 and also at the spinning station 2 in this case.
  • the suction device 19 in the present case is arranged at the movable can changer 14 and has, for example, a telescopic suction arm.
  • the telescopic suction arm is moved toward the spinning station 2 before the sliver residue 21 is removed from the sliver guide 9 , and therefore the sliver residue 21 , when lifted out, automatically enters the effective area of the telescopic suction arm and can be removed.
  • the sucked-off sliver residue 21 can be advantageously collected on the can changer 14 and fed to a separate recycling or disposal process.
  • the handling device 13 it would also be possible to dispense with the handling device 13 .
  • the sliver residue 21 is then unthreaded from the sliver guide 9 directly by means of the suction process itself.
  • the spinning stations 2 include suction devices 19 anyway, which are used in the spinning process, for example, as thread stores, as a cleaning opening, or the like.
  • a suction device 19 of this type is shown on the right in FIG. 10 .
  • the suction device 19 has a suction opening, which, in the present case, is arranged in the area of the sliver 4 between the measuring device 17 and the supply device 5 .
  • the suction device 19 is acted upon via the negative pressure channel 22 .
  • the sliver residue 21 remaining at the spinning station 2 can be lifted out of the sliver guide 9 by means of the handling device 13 and, as a result, brought into the effective area of the suction opening.
  • the can changing process and the separation of the sliver 4 can be carried out, as described with reference to the figures, due a sliver residue length having been reached, the sliver residue length having been predefined in the control unit 16 . Alternatively, this can also take place, however, due to a signal predefined by a control unit 16 , for example, within the scope of a lot change, or can also be triggered manually by an operator.
  • the described methods and devices are equally suited for both alternatives.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US18/254,081 2020-11-24 2021-11-12 Method for carrying out an automatic can changing process at a spinning station of a spinning machine, and spinning machine and movable can changer Pending US20230416952A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102020131089.7 2020-11-24
DE102020131089.7A DE102020131089A1 (de) 2020-11-24 2020-11-24 Verfahren zur Durchführung eines automatischen Kannenwechselvorgangs an einer Spinnstelle einer Spinnmaschine sowie Spinnmaschine und verfahrbarer Kannenwechsler
PCT/EP2021/081569 WO2022112024A1 (fr) 2020-11-24 2021-11-12 Procédé pour exécuter un processus de changement de pot de filature automatique au niveau d'un poste de filature d'un métier à filer, métier à filer, et dispositif de changement de pot de filature déplaçable

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US20230416952A1 true US20230416952A1 (en) 2023-12-28

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US18/254,081 Pending US20230416952A1 (en) 2020-11-24 2021-11-12 Method for carrying out an automatic can changing process at a spinning station of a spinning machine, and spinning machine and movable can changer

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US (1) US20230416952A1 (fr)
EP (1) EP4208592A1 (fr)
CN (1) CN116472371A (fr)
DE (1) DE102020131089A1 (fr)
WO (1) WO2022112024A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230416951A1 (en) * 2020-11-24 2023-12-28 Maschinenfabrik Rieter Ag Method for carrying out an automatic can changing process at a spinning station of a spinning machine, and spinning machine and movable can changer

Citations (19)

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Publication number Priority date Publication date Assignee Title
US4150534A (en) * 1976-10-14 1979-04-24 W. Schlafhorst & Co. Method and apparatus for exchanging sliver cans
US4817373A (en) * 1986-04-03 1989-04-04 Gualchierani System S.A.S. Di Sergio Gualchierani & C. Apparatus for automatically supplying continuous spinning machines with reeled material
US4969323A (en) * 1988-01-28 1990-11-13 Hans Stahlecker Sliver splicing arrangement for a spinning machine
US4998406A (en) * 1988-09-17 1991-03-12 W. Schlafhorst & Co. Silver can transport carriage
US5284008A (en) * 1990-11-30 1994-02-08 W. Schlfhorst Ag & Co. Sliver delivery system in textile machines that process sliver
US5632138A (en) * 1994-08-18 1997-05-27 W. Schlafhorst Ag & Co. Stand for receiving sliver cans
US5636411A (en) * 1992-12-23 1997-06-10 Rieter Ingolstadt Spinnereimaschinenbau Ag Device for the automatic introduction of a fiber sliver
US20130067879A1 (en) * 2011-09-21 2013-03-21 Maschinenfabrik Rieter Ag Spinning Machine as well as a Process for Removing an End Section of a Yarn of a Spinning Machine Prior to a Subsequent Piecing Process
US20130333347A1 (en) * 2012-06-19 2013-12-19 Maschinenfabrik Rieter Ag Air Jet Spinning Machine and Method of Operation Thereof
US20140283496A1 (en) * 2013-03-19 2014-09-25 Maschinenfabrik Rieter Ag Spinning Point of a Spinning Machine and Method for the Operation of the Same
US20160355954A1 (en) * 2015-06-02 2016-12-08 Rieter Ingolstadt Gmbh Method for Operating a Spinning Machine with Handling Elements of their Own Work Station for Spinning Back in a Thread along and a Spinning Machine with Handling elements of their Own Work Station
US20170321351A1 (en) * 2016-05-06 2017-11-09 Rieter Ingolstadt Gmbh Method for Handling a Thread End and a Winding Station
US20190023522A1 (en) * 2017-07-19 2019-01-24 Maschinenfabrik Rieter Ag Method for Operating a Workstation of a Spinning Machine or Winder
US10294587B2 (en) * 2016-06-28 2019-05-21 Rieter Ingolstadt Gmbh Method for operating a work station of a textile machine
US20210032781A1 (en) * 2019-08-02 2021-02-04 Maschinenfabrik Rieter Ag Spinning machine comprising a plurality of adjacently arranged workstations and a displaceable service unit comprising a pneumatic working element and method for supplying the pneumatic working element with vacuum
US20210285131A1 (en) * 2020-03-11 2021-09-16 Maschinenfabrik Rieter Ag Spinning Machine
US11585019B2 (en) * 2018-09-07 2023-02-21 Maschinenfabrik Rieter Ag Method for feeding a sliver end, and spinning machine
US20230183889A1 (en) * 2020-04-22 2023-06-15 Maschinenfabrik Rieter Ag Method for separating a sliver delivered out of a sliver can at a spinning station of a spinning machine, and spinning machine
US20230416951A1 (en) * 2020-11-24 2023-12-28 Maschinenfabrik Rieter Ag Method for carrying out an automatic can changing process at a spinning station of a spinning machine, and spinning machine and movable can changer

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DE2521851A1 (de) 1975-05-16 1976-11-25 Schlafhorst & Co W Verfahren und vorrichtung zum wechseln der faserbandbehaelter einer spinnmaschine
DE3802414A1 (de) 1988-01-28 1989-08-10 Fritz Stahlecker Spinnmaschine mit einer vielzahl von nebeneinander angeordneten spinnstellen
DE3928648A1 (de) * 1989-08-30 1991-03-07 Fritz Stahlecker Anlage mit einer oder mehreren spinnmaschinen und mit wenigstens einem wechselwagen zum wechseln von kannen

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Publication number Priority date Publication date Assignee Title
US4150534A (en) * 1976-10-14 1979-04-24 W. Schlafhorst & Co. Method and apparatus for exchanging sliver cans
US4817373A (en) * 1986-04-03 1989-04-04 Gualchierani System S.A.S. Di Sergio Gualchierani & C. Apparatus for automatically supplying continuous spinning machines with reeled material
US4969323A (en) * 1988-01-28 1990-11-13 Hans Stahlecker Sliver splicing arrangement for a spinning machine
US4998406A (en) * 1988-09-17 1991-03-12 W. Schlafhorst & Co. Silver can transport carriage
US5284008A (en) * 1990-11-30 1994-02-08 W. Schlfhorst Ag & Co. Sliver delivery system in textile machines that process sliver
US5636411A (en) * 1992-12-23 1997-06-10 Rieter Ingolstadt Spinnereimaschinenbau Ag Device for the automatic introduction of a fiber sliver
US5632138A (en) * 1994-08-18 1997-05-27 W. Schlafhorst Ag & Co. Stand for receiving sliver cans
US20130067879A1 (en) * 2011-09-21 2013-03-21 Maschinenfabrik Rieter Ag Spinning Machine as well as a Process for Removing an End Section of a Yarn of a Spinning Machine Prior to a Subsequent Piecing Process
US20130333347A1 (en) * 2012-06-19 2013-12-19 Maschinenfabrik Rieter Ag Air Jet Spinning Machine and Method of Operation Thereof
US20140283496A1 (en) * 2013-03-19 2014-09-25 Maschinenfabrik Rieter Ag Spinning Point of a Spinning Machine and Method for the Operation of the Same
US20160355954A1 (en) * 2015-06-02 2016-12-08 Rieter Ingolstadt Gmbh Method for Operating a Spinning Machine with Handling Elements of their Own Work Station for Spinning Back in a Thread along and a Spinning Machine with Handling elements of their Own Work Station
US20170321351A1 (en) * 2016-05-06 2017-11-09 Rieter Ingolstadt Gmbh Method for Handling a Thread End and a Winding Station
US10294587B2 (en) * 2016-06-28 2019-05-21 Rieter Ingolstadt Gmbh Method for operating a work station of a textile machine
US20190023522A1 (en) * 2017-07-19 2019-01-24 Maschinenfabrik Rieter Ag Method for Operating a Workstation of a Spinning Machine or Winder
US11585019B2 (en) * 2018-09-07 2023-02-21 Maschinenfabrik Rieter Ag Method for feeding a sliver end, and spinning machine
US20210032781A1 (en) * 2019-08-02 2021-02-04 Maschinenfabrik Rieter Ag Spinning machine comprising a plurality of adjacently arranged workstations and a displaceable service unit comprising a pneumatic working element and method for supplying the pneumatic working element with vacuum
US20210285131A1 (en) * 2020-03-11 2021-09-16 Maschinenfabrik Rieter Ag Spinning Machine
US11661680B2 (en) * 2020-03-11 2023-05-30 Maschinenfabrik Rieter Ag Spinning machine
US20230183889A1 (en) * 2020-04-22 2023-06-15 Maschinenfabrik Rieter Ag Method for separating a sliver delivered out of a sliver can at a spinning station of a spinning machine, and spinning machine
US20230416951A1 (en) * 2020-11-24 2023-12-28 Maschinenfabrik Rieter Ag Method for carrying out an automatic can changing process at a spinning station of a spinning machine, and spinning machine and movable can changer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230416951A1 (en) * 2020-11-24 2023-12-28 Maschinenfabrik Rieter Ag Method for carrying out an automatic can changing process at a spinning station of a spinning machine, and spinning machine and movable can changer

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DE102020131089A1 (de) 2022-05-25
WO2022112024A1 (fr) 2022-06-02
CN116472371A (zh) 2023-07-21
EP4208592A1 (fr) 2023-07-12

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