WO2024023049A1 - Buffer device for matching the output speed of a lap of a spreading-lapping machine to the input speed of a device for processing the lap downstream of the spreading-lapping machine - Google Patents

Buffer device for matching the output speed of a lap of a spreading-lapping machine to the input speed of a device for processing the lap downstream of the spreading-lapping machine Download PDF

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Publication number
WO2024023049A1
WO2024023049A1 PCT/EP2023/070510 EP2023070510W WO2024023049A1 WO 2024023049 A1 WO2024023049 A1 WO 2024023049A1 EP 2023070510 W EP2023070510 W EP 2023070510W WO 2024023049 A1 WO2024023049 A1 WO 2024023049A1
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WO
WIPO (PCT)
Prior art keywords
belt
lapper
spreader
strand
speed
Prior art date
Application number
PCT/EP2023/070510
Other languages
French (fr)
Inventor
Jean-Christophe Laune
Stéphane DISPLAN
Original Assignee
Andritz Asselin-Thibeau
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Andritz Asselin-Thibeau filed Critical Andritz Asselin-Thibeau
Publication of WO2024023049A1 publication Critical patent/WO2024023049A1/en

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G23/00—Feeding fibres to machines; Conveying fibres between machines
    • D01G23/06—Arrangements in which a machine or apparatus is regulated in response to changes in the volume or weight of fibres fed, e.g. piano motions
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G21/00—Combinations of machines, apparatus, or processes, e.g. for continuous processing
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G25/00—Lap-forming devices not integral with machines specified above

Definitions

  • Buffer device for adapting the exit speed of a web from a lapper spreader to the entry speed of a web treatment device downstream of the lapper spreader.
  • the present invention relates to a buffer device for adapting the output speed of a web from a spreader-lapper to synchronize it with the input speed of a device for subsequent processing of the web, for example a needling machine or other consolidation device.
  • the present invention also relates to an installation comprising a spreader-spreader, a subsequent processing device, such as a needling machine or other consolidation device, and a buffer device of this type.
  • the present invention also relates to a spreader spreader in which a buffer device of this type is incorporated.
  • the exit speed of a web from a spreader-lapper in particular the speed of movement of its exit apron, is not constant and varies over time, in particular due to its slowing down or its stopping each time the lapper carriage reaches the end of its travel and leaves in the opposite direction, these reversals of direction being particularly marked during the production of low weight webs, for example less than 150g/m 2 , to avoid the the appearance of defects at the edges of the tablecloth.
  • the web is conventionally sent to a subsequent processing installation, for example a needling machine, and it is necessary to ensure that the web enters the needling machine at a speed adapted to this, in particular a constant speed.
  • an installation comprising:
  • a spreader-lapper comprising an outlet apron delivering at the outlet a sheet of fibers, in particular non-woven, consisting of a stack of sails deposited in a zigzag by a back and forth movement of a lapper carriage the spreader-lapper, the speed of the exit apron being a speed Vi(t) varying as a function of time;
  • the buffer device comprises a lower belt, in particular without end, and an upper belt, in particular without end, the path of the lower belt being such that the sheet is turned over, in particular by 180° or substantially by 180°, twice in succession in opposite directions, around two turning rollers respectively upstream and downstream, the upper belt covering the sheet by sandwiching the latter with the lower belt over at least one covering zone extending over at least a part of the area of the belts extending between the two upstream and downstream turning rollers, in particular over the entire area of the belts extending between the two upstream and downstream turning rollers, and, preferably also over at least one part of the circumference of the upstream turning roller and/or part of the circumference of the downstream turning roller, and the axis of one of the two upstream or downstream rollers or the two axes of the two rollers, preferably the axis of the downstream roller alone, is/are mounted movable, in particular in translation, in particular along a rectilinear trajectory, in particular horizontal, to thus transform the speed
  • the two lower and upper belts are endless, that is to say they form a respective closed loop, and holding means are provided capable of keeping the respective lengths of the two lower and upper belts constant. , these holding means being synchronized with the movement(s) of the axis(es) of the upstream roller and/or the downstream roller.
  • the holding means consist of a lower holding roller around which the lower belt extends and of an upper holding roller around which the upper belt extends, both axes of the two rollers being made integral in movement with the axis of the movable upstream or downstream roller, in particular by being secured to a carriage to which the axis of the upstream or downstream roller is also secured.
  • the carriage is movable along two rectilinear rails.
  • the two rectilinear rails are oriented horizontally.
  • the lower mat is air-permeable and the upper mat is air-impermeable.
  • the present invention also relates, according to a second aspect, to a machine capable of forming the buffer device of the installation according to the invention.
  • the speed adaptation buffer device comprises a lower belt, in particular endless, and an upper belt, in particular endless, the path of the lower belt being such that it is turned over, in particular at 180° or substantially at 180°, twice in succession in opposite directions, around two turning rollers respectively upstream and downstream, the upper belt covering the lower belt over at least one covering zone extending over at least part of the zone belts extending between the two upstream and downstream turning rollers, in particular over the entire area of the belts extending between the two upstream and downstream turning rollers, and preferably also over at least part of the circumference of the upstream roller turning and/or part of the circumference of the downstream turning roller, and the axis of one of the two upstream or downstream rollers or the two axes of the two rollers, preferably the axis of the downstream roller alone, is/ are mounted movable, in particular in translation, in particular following a rectilinear trajectory, in particular horizontal, to thus transform the speed V1 (t) of an upstream section of the lower belt into
  • the present invention also relates to a spreader-lapper in which means having the function of buffering the buffering device according to the invention are incorporated.
  • a spreader-lapper in particular placed at the outlet of a carding device producing a web of fibers, in particular non-wovens, is as defined in claim 1 , improvements and embodiments being defined in the subclaims.
  • a spreader-lapper can include a front belt, in particular endless, bringing the web of fibers in the spreader-lapper to an input carriage or accumulator, a rear belt bringing the veil accumulated up to a lapper carriage and an apron on which the lapper carriage deposits the web accumulated by the accumulator carriage alternately at an angle in one direction and in the other to form a web moving at a speed V1 (t) which varies in function of time, in particular periodically, the spreader-lapper further comprising an exit belt, through which the sheet exits at a speed V2(t) different from the speed V1 (t), in particular at a constant speed, the sheet undergoing between the apron and the exit belt at least one turning around a roller whose axis is mounted movable, in particular in translation, in particular in the horizontal direction, and at least after the turning, the sheet is sandwiched between an air-permeable carpet and an air-impermeable carpet.
  • the exit belt is permeable to air
  • the apron is an upper strand of an endless air-impermeable belt and the turning takes place at one of the rollers around from which the endless carpet extends.
  • an endless air-permeable intermediate belt is provided between the apron and the outlet belt and the turning of the sheet takes place around one of the rollers around which 'extends the intermediate belt endlessly, and preferably, the apron and the exit belt are part of the same endless belt and the arrangement is such that the sheet is sandwiched before turning, during turning and after the reversal between the endless intermediate mat and said same endless mat, preferably airtight.
  • Figure 1 is a side view of an installation according to the invention, the spreader-lapper being on the right part of the figure, the compensation device being in the center and the subsequent processing device, arranged at left of the figure, not being shown;
  • Figure 2 is a larger scale view of the compensation machine of the installation of Figure 1;
  • Figure 3 is a schematic side view of a part of a spreader-lapper according to one embodiment of the invention.
  • Figure 4 is a schematic side view of a part of a spreader-lapper according to another embodiment of the present invention.
  • Figure 5 is a schematic side view of a part of a spreader-lapper according to yet another embodiment of the invention.
  • Figure 6 is a partially broken schematic side view of the spreader spreader of Figure 3.
  • Figure 7 is a partially broken schematic side view of the spreader spreader of Figure 4.
  • Figure 8 is a partially broken schematic side view of the spreader spreader of Figure 5.
  • FIG. 1 and 2 an embodiment of an installation according to the invention is shown. This comprises a spreader-lapper 1, delivering through an outlet apron 2, a sheet of non-woven fibers consisting of a stack of fiber webs deposited successively at an angle to the direction of longitudinal movement of the apron 2 by an accumulator carriage (not visible in the figure) of the spreader-lapper.
  • a compensation machine 3 Downstream of the spreader-lapper 1 and its outlet apron 2, there is arranged a compensation machine 3, which receives the sheet of fibers from the apron 2 on a section 4.1 upstream of a permeable lower belt 4 in air, which transports the sheet of fibers to a downstream outlet section 4.2 of the inlet belt 4, to supply a subsequent processing device which can, for example, be a needling machine or, as shown in FIG. 1, a stretcher followed by a needling machine (not visible in the figure).
  • the lower belt 4 is endless and extends around rollers 6.1, 6.2, 6.3, 6.4, 6.5 and 6.6. Among these rollers 6.1 to 6.6, two rollers 6.3 and 6.6 respectively are driven by motors 7 lower and 8 upper.
  • the lower belt 4 comprises a first substantially horizontal upstream section extending between the roller 6.1, closest to the spreader-lapper or roller 6.1 upstream, up to a first roller 6.6 for upstream reversal at 180° around from which it makes a 180° half-turn, then a section going up to a lower downstream turning roller 6.5 where it makes a 180° half-turn in the direction opposite to the half-turn made to the upstream turning roller, to thus return the sheet in the same direction as that in which it entered the upstream entry section of the lower belt 4, up to a lower section 4.2 extending to a downstream end roller 6.4.
  • the entry belt 4 then comprises a lower section between the downstream end roller 6.4 and the roller 6.3 driven by the motor 7, then returns along a section extending between the roller 6.3 and the roller 6.2, where it undergoes a reversal to return to roll 6.1.
  • the sheet of fibers emerging from the apron 2 is supported by the lower belt 4 on the first and third section or upstream entry section and downstream exit end section, as well as around the two upstream turning rollers and downstream 6.6 and 6.5.
  • the device further comprises an upper airtight belt 9 which is endless and is driven around rollers 6.7, 6.8, 6.9 and 6.10, as well as around rollers 6.5 and 6.6.
  • the upper belt 9 covers the sheet and sandwiches it with the belt 4 on part of the first section of the belt 4, a half-circumference of the upstream turning roller 6.6, the intermediate section between the two upstream and downstream turning rollers 6.6 6.5, a half-circumference of the downstream turning roller 6.5 and part of the downstream end section 5 of the belt 4.
  • the downstream reversing roller 6.5 is mounted so that its axis can move along rails 12 in a horizontal direction.
  • the motor 8 of the upstream turning roller 6.6 is speed controlled so that the entry section of the belt 4 has the same speed as that of the apron 2 of the spreader-lapper 1.
  • the motor 7 driving the downstream roller 6.3 is controlled in output speed to achieve a constant speed corresponding to the speed of the input belt of the subsequent processing device, for example of the acute ileuse.
  • the two motors 7 and 8 rotate at different speeds each corresponding, one to the speed of the exit belt 2 of the spreader-lapper and the other 7 to the entry speed of the spreading device. further treatment, particularly of the needle.
  • the difference between these speeds causes a variation in the length of the section of the lower belts 4 and upper 9 which extends between the rollers 6.5 and 6.6, and this variation is compensated by the movement of the axes of the rollers 6.5 and 6.2 for the lower belt 4 and by the movement of the axes of the rollers 6.5 and 6.10 for the upper belt 9, the other axes of the rollers being fixed (the rollers are quasi-static, not moving in translation, but only in rotation relative to their respective axis)).
  • FIG. 3 and 6 a spreader-lapper according to the invention is shown, in which a compensation device is incorporated.
  • the spreader-lapper of Figures 3 and 6 comprises a front belt 303', in particular endless, bringing the web of fibers in the spreader-lapper to an input carriage or accumulator, a rear belt 302' bringing the web accumulated up to a lapper or depositing carriage and an apron 100' on which the lapper carriage deposits the web accumulated by the accumulator carriage alternately at an angle in one direction and the other to form a web moving at a speed V1 (t) which varies over time, particularly periodically.
  • the spreader-lapper further comprising an exit belt, through which the web exits at a speed V2(t) different from the speed V1 (t), in particular at a constant speed.
  • the spreader spreader comprises an apron 100' on an upper strand 2' of which is deposited in a zigzag manner by the carriage for depositing the web in several layers to form a sheet N, the apron 100' being driven around four rollers 3. T, 3.2', 3.3' and 3.4' of which at least one is a motor.
  • An endless air-permeable belt constitutes a 200' exit belt from the spreader-lapper on a 20' upper strand from which the web leaves the spreader-lapper.
  • This 200' endless output belt is shown schematically and is driven in the same way by rollers which rotate at constant speed or synchronized with the subsequent processing device.
  • the N sheet undergoes an inversion around the 3.2' roller to be sandwiched between a lower strand, opposite the upper 2' strand, of the airtight apron and the upper 20' strand of the exit belt.
  • FIGs 4 and 7 represent another embodiment.
  • the spreader-lapper of Figures 4 and 7 comprises a front belt 303”, in particular endless, bringing the web of fibers in the spreader-lapper to an input carriage or accumulator, a rear belt 302” bringing the web accumulated up to a lapper or depositing carriage and a 100” apron on which the lapper carriage deposits the web accumulated by the accumulator carriage alternately at an angle in one direction and the other to form a web moving at a speed V1 (t) which varies over time, particularly periodically.
  • the spreader-lapper further comprising an exit belt, through which the web exits at a speed V2(t) different from the speed V1 (t), in particular at a constant speed.
  • the upper 2” strand of the 100” apron in the form of an endless airtight belt is driven around 3.1”, 3.2”, 3.3” and 3.4” rollers with fixed axes, at least one of which is driving force.
  • An endless, intermediate, air-permeable 30” belt is provided, placed between the 100” apron and a 20” strand of a 200” outlet belt, the intermediate 30” belt being driven between two 4.1” rollers. and 4.2”, preferably at least one of which is a motor.
  • the axes of the 4.1” and 4.2” rollers are mounted movable together in translation in the horizontal direction, following a back and forth movement, to thus adapt the speed of movement of the sheet which passes from the upper 2” strand having a variable speed in function of time, at the upper 20” strand of the output belt whose speed, notably constant, is equal to the speed of the input belt of the subsequent processing device.
  • the sheet N undergoes an inversion around the roller 4.1”. Before turning, it is sandwiched between a lower strand of the apron, facing opposite the upper 2” strand, and an upper strand of the intermediate 30” belt. After turning, it is sandwiched between the upper 20” strand of the exit belt and a lower strand of the intermediate 30” belt. The lower strand of the intermediate 30” belt is facing away from the upper strand of the intermediate 30” belt.
  • the endless belt forming the intermediate belt maintains a constant total length.
  • the spreader-lapper of Figures 5 and 8 comprises a front belt 303'', in particular endless, bringing the web of fibers in the spreader-lapper to an input carriage or accumulator, a rear belt 302'' bringing the accumulated web to a lapper carriage 304'” or deposit and an apron 100'' on which the lapper carriage 304'' deposits the web accumulated by the accumulator carriage 30T'' alternately at an angle in one direction and in the another to form a sheet moving at a speed V1 (t) which varies as a function of time, in particular periodically.
  • the spreader-lapper further comprising an exit belt (which, in this embodiment, is a part of the apron 100'”), through which the web exits at a speed V2(t) different from the speed V1 (t ), especially at a constant speed.
  • An upper 2'” strand of a 100'” apron in the form of an endless airtight mat extends around 3. T rollers at 3.7'”, the upper 2'” strand, on which is deposited the web N by the lapper carriage, extends between two upper rollers 3. T” and 3.4'”.
  • the sheet N undergoes a first turning around the upper turning roller 3.3'” and is then sandwiched between an intermediate upper strand, turned opposite the upper strand 2'” of the apron, which extends between the roller 3.3 '” of upper turning and a 3.7'' roller of lower turning, and an upper strand of an endless intermediate 30'' belt which extends around the 3.7'' roller and a 3.8'' roller.
  • the sheet then undergoes, around the 3.7'' lower turning roller, a second 180° turning, in a direction opposite to the first turning, to then be supported by a lower 20'' strand of exit belt from the apron extending between the 3.7'' turning roller and a lower 3.6'' downstream end roller, the web leaving the spreader-lapper on the lower 20'' exit strand.
  • the upper strand of the intermediate 30'" belt sandwiches the tablecloth with the upper intermediate strand of the 2'" apron between the two turning rollers respectively 3.3'' and 3.7'' then the lower strand of the 30'' belt intermediate sandwiches the ply with the lower 20'” strand of belt exiting the apron between the 3.7'' turning roller and a 3.8'' roller at the downstream end of the 30'' intermediate belt.
  • the 30'” intermediate belt is permeable to air and is driven around the two rollers 3.7'' and 3.8'' which are mounted movable together in translation following a back and forth movement so that their axes move in translation to adapt the speed of movement of the sheet which passes from the upper 2” strand of the apron 200”, having a variable speed as a function of time, to the lower 20” strand of the apron 200”, whose speed , notably constant, is equal to the speed of the input belt of the subsequent processing device.
  • the tablecloth is sandwiched between the apron and the intermediate 30'' belt before the second turning, during the second turning, around the 3.7'' roller and after the second turning, and is thus well protected against the effects harmful driving and/or centrifugal forces linked to the translational and rotational movements of the 3.7’” and 3.8’” rollers
  • Figures 6 to 8 are partially torn away to allow us to see the entry and exit belts and the entry and deposit carts.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Abstract

The invention relates to a spreading-lapping machine, in particular arranged at the output of a carding device for producing a fibre web, in particular a non-woven fibre web, which spreading-lapping machine comprises a front belt for transporting the fibre web in the spreading-lapping machine to an input carriage or a folding carriage, a rear belt for transporting the folded web to a depositor carriage and an apron on an upper belt conveyor (2'; 2''; 2''') from which the depositor carriage deposits the web folded by the folding carriage alternatively at an angle in one direction and then another to form a lap (N) moving at a speed V1(t) that varies as a function of time, in particular at regular intervals, the spreading-lapping machine further comprising an output belt conveyor (20'; 20''; 20''') on which the lap (N) is removed from the spreading-lapping machine at a speed V2(t) different from the speed V1(t), in particular at a constant speed, the lap (N) changing direction at least once between the upper belt conveyor (2'; 2''; 2''') and the output belt conveyor (20'; 20''; 20'''), in particular by 180°, around a roller (3.2'; 4.1''; 3.7''') that is movably mounted in translation along the output belt conveyor (20'; 20''; 20'''), the lap (N) being sandwiched between another belt conveyor, facing away from the upper belt conveyor (2'), of the apron and the output belt conveyor (20') and/or between another belt conveyor, facing away from the upper belt conveyor (2''; 2'''), of the apron and an upper belt conveyor of an intermediate belt (30''; 30''') and/or between a lower belt conveyor of an intermediate belt (30''; 30''') and the output belt conveyor (20''; 20''').

Description

Dispositif tampon pour adapter la vitesse de sortie d’une nappe d’un étaleur nappeur à la vitesse d’entrée d’un dispositif de traitement de la nappe en aval de l’étaleur nappeur. Buffer device for adapting the exit speed of a web from a lapper spreader to the entry speed of a web treatment device downstream of the lapper spreader.
[0001 ] La présente invention se rapporte à un dispositif tampon pour adapter la vitesse de sortie d’une nappe d’un étaleur-nappeur pour la synchroniser avec la vitesse d’entrée d’un dispositif de traitement ultérieur de la nappe, par exemple une aiguilleteuse ou autre dispositif de consolidation. La présente invention se rapporte aussi à une installation comportant un étaleur-nappeur, un dispositif de traitement ultérieur, tel qu’une aiguilleteuse ou autre dispositif de consolidation, et un dispositif tampon de ce genre. La présente invention se rapporte aussi à un étaleur nappeur dans lequel est incorporé un dispositif tampon de ce genre. [0001] The present invention relates to a buffer device for adapting the output speed of a web from a spreader-lapper to synchronize it with the input speed of a device for subsequent processing of the web, for example a needling machine or other consolidation device. The present invention also relates to an installation comprising a spreader-spreader, a subsequent processing device, such as a needling machine or other consolidation device, and a buffer device of this type. The present invention also relates to a spreader spreader in which a buffer device of this type is incorporated.
[0002] Classiquement, la vitesse de sortie d’une nappe d’un étaleur-nappeur, en particulier la vitesse de déplacement de son tablier de sortie, n’est pas constante et varie au cours du temps, notamment en raison de son ralentissement ou de son arrêt chaque fois que le chariot nappeur arrive en bout de course et repart en direction opposée, ces revirements de direction étant particulièrement marqués lors de la production de nappes de faible grammage, par exemple inférieur à 150g/m2, pour éviter l’apparition de défauts au niveau des bords de la nappe. Or, après sa sortie de l’étaleur-nappeur, la nappe est classiquement envoyée dans une installation de traitement ultérieur, par exemple une aiguilleteuse, et il est nécessaire de faire en sorte que la nappe entre dans l’aiguilleteuse à une vitesse adaptée à celle-ci, notamment une vitesse constante. [0002] Conventionally, the exit speed of a web from a spreader-lapper, in particular the speed of movement of its exit apron, is not constant and varies over time, in particular due to its slowing down or its stopping each time the lapper carriage reaches the end of its travel and leaves in the opposite direction, these reversals of direction being particularly marked during the production of low weight webs, for example less than 150g/m 2 , to avoid the the appearance of defects at the edges of the tablecloth. However, after leaving the spreader-lapper, the web is conventionally sent to a subsequent processing installation, for example a needling machine, and it is necessary to ensure that the web enters the needling machine at a speed adapted to this, in particular a constant speed.
[0003] On connait déjà de FR2930563A1 , au nom de la demanderesse, un dispositif tampon de ce genre disposé à la sortie d’un étaleur-nappeur, avant une aiguilleteuse. L’adaptation de la vitesse de la nappe y est réalisée par un déplacement vertical d’un tapis supportant la nappe, ce qui a pour effet de faire varier une longueur utile de la nappe supportée par le tapis et ainsi adapter sa vitesse de déplacement à celle souhaitée à l’entrée du dispositif de traitement ultérieur. [0003] We already know from FR2930563A1, in the name of the applicant, a buffer device of this type placed at the outlet of a spreader-lapper, before a needling machine. The adaptation of the speed of the sheet is carried out by a vertical movement of a belt supporting the sheet, which has the effect of varying a useful length of the sheet supported by the belt and thus adapting its speed of movement to that desired at the entrance to the subsequent processing device.
[0004] Bien que le dispositif de l’art antérieur permette d’obtenir l’adaptation de la vitesse de sortie de l’étaleur-nappeur, ce dispositif présente cependant comme inconvénient, en raison des mouvements de va-et-vient verticaux, d’engendrer une dégradation de la nappe, alors même que celle-ci, non encore consolidée, est encore de structure fragile. [0004] Although the device of the prior art makes it possible to adapt the output speed of the spreader-lapper, this device nevertheless has the disadvantage, due to the vertical back-and-forth movements, to generate a degradation of the water table, even though it, not yet consolidated, is still fragile in structure.
[0005] On aimerait ainsi avoir à disposition un dispositif tampon d’adaptation de la vitesse de sortie d’un étaleur-nappeur à une vitesse d’entrée, notamment constante, d’un dispositif de traitement ultérieur, notamment d’une aiguilleteuse ou autre dispositif de consolidation, qui soit tel que la nappe soit transférée de l’étaleur-nappeur au dispositif de traitement ultérieur en ayant toujours une qualité égale à celle qu’elle a en sortant de l’étaleur-nappeur. [0005] We would thus like to have available a buffer device for adapting the output speed of a spreader-lapper to an input speed, in particular constant, of a subsequent processing device, in particular a needling machine or other consolidation device, which is such that the web is transferred from the spreader-lapper to the subsequent processing device while always having a quality equal to that which it has when leaving the spreader-lapper.
[0006] Suivant un premier aspect de l’invention, une installation comportant : [0006] According to a first aspect of the invention, an installation comprising:
- un étaleur-nappeur, comportant un tablier de sortie délivrant en sortie une nappe de fibres, notamment de non-tissé, constituée d’un empilement de voiles déposés en zigzag par un mouvement en va-et-vient d’un chariot nappeur de l’étaleur-nappeur, la vitesse du tablier de sortie étant une vitesse Vi(t) variant en fonction du temps; - a spreader-lapper, comprising an outlet apron delivering at the outlet a sheet of fibers, in particular non-woven, consisting of a stack of sails deposited in a zigzag by a back and forth movement of a lapper carriage the spreader-lapper, the speed of the exit apron being a speed Vi(t) varying as a function of time;
- un dispositif de traitement ultérieur disposé en aval de l’étaleur-nappeur, et ayant un tapis d’entrée se déplaçant à une vitesse V2(t) différente de la vitesse Vi(t), notamment une vitesse V2(t) constante; et - a subsequent processing device arranged downstream of the spreader-lapper, and having an inlet belt moving at a speed V2(t) different from the speed Vi(t), in particular a constant speed V2(t); And
- un dispositif tampon d’adaptation de la vitesse disposé entre l’étaleur-nappeur et le dispositif de traitement ultérieur, - a speed adaptation buffer device placed between the spreader-lapper and the subsequent processing device,
- est caractérisée en ce que le dispositif tampon comporte un tapis inférieur, notamment sans fin, et un tapis supérieur, notamment sans fin, le trajet du tapis inférieur étant tel que la nappe est retournée, notamment à 180° ou sensiblement à 180°, deux fois en succession dans des sens opposés, autour de deux rouleaux de retournement respectivement amont et aval, le tapis supérieur couvrant la nappe en prenant celle-ci en sandwich avec le tapis inférieur sur au moins une zone de couvrement s’étendant sur au moins une partie de la zone des tapis s’étendant entre les deux rouleaux de retournement amont et aval, notamment sur toute la zone des tapis s’étendant entre les deux rouleaux de retournement amont et aval, et, de préférence également sur au moins une partie de la circonférence du rouleau amont de retournement et/ou une partie de la circonférence du rouleau aval de retournement, et l’axe de l’un des deux rouleaux amont ou aval ou les deux axes des deux rouleaux, de préférence l’axe du rouleau aval seul, est/sont montés mobiles, notamment en translation, notamment suivant une trajectoire rectiligne, notamment horizontale, pour ainsi transformer la vitesse d’un tronçon amont du tapis inférieur, correspondant à la vitesse Vi(t) de sortie de l’étaleur-nappeur, en une vitesse d’un tronçon aval du tapis inférieur correspondant à la vitesse V2(t) d’entrée du dispositif de traitement ultérieur, notamment de l’aiguilleteuse, notamment une vitesse V2(t) constante tandis que la vitesse V1 (t) varie au cours du temps, notamment de manière périodique. - is characterized in that the buffer device comprises a lower belt, in particular without end, and an upper belt, in particular without end, the path of the lower belt being such that the sheet is turned over, in particular by 180° or substantially by 180°, twice in succession in opposite directions, around two turning rollers respectively upstream and downstream, the upper belt covering the sheet by sandwiching the latter with the lower belt over at least one covering zone extending over at least a part of the area of the belts extending between the two upstream and downstream turning rollers, in particular over the entire area of the belts extending between the two upstream and downstream turning rollers, and, preferably also over at least one part of the circumference of the upstream turning roller and/or part of the circumference of the downstream turning roller, and the axis of one of the two upstream or downstream rollers or the two axes of the two rollers, preferably the axis of the downstream roller alone, is/are mounted movable, in particular in translation, in particular along a rectilinear trajectory, in particular horizontal, to thus transform the speed of an upstream section of the lower belt, corresponding to the speed Vi(t) output of the spreader-lapper, at a speed of a downstream section of the lower belt corresponding to the input speed V2(t) of the subsequent processing device, in particular of the needling machine, in particular a speed V2(t) constant while the speed V1 (t) varies over time, in particular periodically.
[0007] En faisant ainsi en sorte que la nappe de fibres passant dans le dispositif tampon soit retournée en étant prise en sandwich entre les deux tapis supérieur et inférieur et en modifiant la vitesse par l’intermédiaire du déplacement d’un des rouleaux de retournement, on s’assure que la nappe reste bien protégée pendant la partie du dispositif réalisant la modification et l’adaptation de la vitesse de déplacement du tapis inférieur la supportant, et notamment on s’assure que la nappe est protégée contre les actions nocives de forces d’entraînement ou centrifuges liées à des mouvements de va-et-vient nécessaires à la réalisation de la compensation, et on obtient ainsi une nappe en entrée de l’installation d’aiguilletage ou de consolidation ou analogue qui est d’aussi bonne qualité qu’elle l’était à la sortie de l’étaleur-nappeur et ce tout en étant fournie à l’aiguilleteuse à une vitesse adaptée à celle-ci, notamment une vitesse constante. [0007] By thus ensuring that the sheet of fibers passing through the buffer device is turned over by being sandwiched between the two upper and lower belts and by modifying the speed via the movement of one of the turning rollers , we ensure that the sheet remains well protected during the part of the device carrying out the modification and adaptation of the speed of movement of the lower belt supporting it, and in particular we ensure that the sheet is protected against the harmful actions of driving or centrifugal forces linked to back-and-forth movements necessary to achieve compensation, and we thus obtain a sheet at the entrance to the needling or consolidation installation or the like which is equally good quality as it was at the outlet of the spreader-lapper and this while being supplied to the needling machine at a speed adapted to it, in particular a constant speed.
[0008] De préférence, les deux tapis inférieur et supérieur sont sans fin, c’est-à-dire forment une boucle fermée respective, et il est prévu des moyens de maintien aptes à maintenir constantes les longueurs respectives des deux tapis inférieur et supérieur, ces moyens de maintien étant synchronisés avec le ou les mouvements de l’axe ou des axes du rouleau amont et/ou du rouleau aval. [0008] Preferably, the two lower and upper belts are endless, that is to say they form a respective closed loop, and holding means are provided capable of keeping the respective lengths of the two lower and upper belts constant. , these holding means being synchronized with the movement(s) of the axis(es) of the upstream roller and/or the downstream roller.
[0009] Suivant un mode de réalisation préféré, les moyens de maintien sont constitués d’un rouleau de maintien inférieur autour duquel s’étend le tapis inférieur et d’un rouleau de maintien supérieur autour duquel s’étend le tapis supérieur, les deux axes des deux rouleaux étant rendus solidaires en déplacement de l’axe du rouleau amont ou aval mobile, notamment en étant solidarisé à un chariot auquel l’axe du rouleau amont ou aval est également solidarisé. [0009] According to a preferred embodiment, the holding means consist of a lower holding roller around which the lower belt extends and of an upper holding roller around which the upper belt extends, both axes of the two rollers being made integral in movement with the axis of the movable upstream or downstream roller, in particular by being secured to a carriage to which the axis of the upstream or downstream roller is also secured.
[0010] De préférence, le chariot est mobile le long de deux rails rectilignes. [0011 ] En particulier, les deux rails rectilignes sont orientés à l’horizontale. Preferably, the carriage is movable along two rectilinear rails. [0011] In particular, the two rectilinear rails are oriented horizontally.
[0012] De préférence, le tapis inférieur est perméable à l’air et le tapis supérieur est imperméable à l’air. [0012] Preferably, the lower mat is air-permeable and the upper mat is air-impermeable.
[0013] La présente invention se rapporte également, suivant un deuxième aspect, à une machine pouvant former le dispositif tampon de l’installation suivant l’invention. [0013] The present invention also relates, according to a second aspect, to a machine capable of forming the buffer device of the installation according to the invention.
[0014] Notamment, le dispositif tampon d’adaptation de la vitesse comporte un tapis inférieur, notamment sans fin, et un tapis supérieur, notamment sans fin, le trajet du tapis inférieur étant tel qu’il est retourné, notamment à 180° ou sensiblement à 180°, deux fois en succession dans des sens opposés, autour de deux rouleaux de retournement respectivement amont et aval, le tapis supérieur couvrant le tapis inférieur sur au moins une zone de couvrement s’étendant sur au moins une partie de la zone des tapis s’étendant entre les deux rouleaux de retournement amont et aval, notamment sur toute la zone des tapis s’étendant entre les deux rouleaux de retournement amont et aval, et de préférence également sur au moins une partie de la circonférence du rouleau amont de retournement et/ou une partie de la circonférence du rouleau aval de retournement, et l’axe de l’un des deux rouleaux amont ou aval ou les deux axes des deux rouleaux, de préférence l’axe du rouleau aval seul, est/sont monté(s) mobiles, notamment en translation, notamment suivant une trajectoire rectiligne, notamment horizontale, pour ainsi transformer la vitesse V1 (t) d’un tronçon amont du tapis inférieur en une vitesse V2(t) d’un tronçon aval du tapis inférieur différente de V1 (t), notamment V2(t) étant constante tandis que V1 (t) varie en fonction du temps, notamment de manière périodique. [0014] In particular, the speed adaptation buffer device comprises a lower belt, in particular endless, and an upper belt, in particular endless, the path of the lower belt being such that it is turned over, in particular at 180° or substantially at 180°, twice in succession in opposite directions, around two turning rollers respectively upstream and downstream, the upper belt covering the lower belt over at least one covering zone extending over at least part of the zone belts extending between the two upstream and downstream turning rollers, in particular over the entire area of the belts extending between the two upstream and downstream turning rollers, and preferably also over at least part of the circumference of the upstream roller turning and/or part of the circumference of the downstream turning roller, and the axis of one of the two upstream or downstream rollers or the two axes of the two rollers, preferably the axis of the downstream roller alone, is/ are mounted movable, in particular in translation, in particular following a rectilinear trajectory, in particular horizontal, to thus transform the speed V1 (t) of an upstream section of the lower belt into a speed V2 (t) of a downstream section of the lower belt different from V1 (t), in particular V2 (t) being constant while V1 (t) varies as a function of time, in particular periodically.
[0015] La présente invention se rapporte également à un étaleur-nappeur dans lequel sont incorporés des moyens ayant la fonction de tampon du dispositif tampon suivant l’invention. [0015] The present invention also relates to a spreader-lapper in which means having the function of buffering the buffering device according to the invention are incorporated.
[0016] Ainsi, suivant un troisième aspect de l’invention, un étaleur-nappeur, notamment disposé à la sortie d’un dispositif de carde produisant un voile de fibres, notamment de non-tissés, est tel que défini à la revendication 1 , des perfectionnements et modes de réalisation étant définis aux sous revendications. [0016] Thus, according to a third aspect of the invention, a spreader-lapper, in particular placed at the outlet of a carding device producing a web of fibers, in particular non-wovens, is as defined in claim 1 , improvements and embodiments being defined in the subclaims.
[0017] En outre, de manière favorable, un étaleur nappeur peut comporter un tapis avant, notamment sans fin, amenant le voile de fibres dans l’étaleur-nappeur jusqu’à un chariot d’entrée ou accumulateur, un tapis arrière amenant le voile accumulé jusqu’à un chariot nappeur et un tablier sur lequel le chariot nappeur dépose le voile accumulé par le chariot accumulateur alternativement en biais dans un sens et dans l’autre pour former une nappe se déplaçant à une vitesse V1 (t) qui varie en fonction du temps, notamment de manière périodique, l’étaleur- nappeur comportant en outre un tapis de sortie, par lequel sort la nappe à une vitesse V2(t) différente de la vitesse V1 (t), notamment à une vitesse constante, la nappe subissant entre le tablier et le tapis de sortie au moins un retournement autour d’un rouleau dont l’axe est monté mobile, notamment en translation, notamment dans la direction horizontale, et au moins après le retournement, la nappe est prise en sandwich entre un tapis perméable à l’air et un tapis imperméable à l’air. [0017] Furthermore, in a favorable manner, a spreader-lapper can include a front belt, in particular endless, bringing the web of fibers in the spreader-lapper to an input carriage or accumulator, a rear belt bringing the veil accumulated up to a lapper carriage and an apron on which the lapper carriage deposits the web accumulated by the accumulator carriage alternately at an angle in one direction and in the other to form a web moving at a speed V1 (t) which varies in function of time, in particular periodically, the spreader-lapper further comprising an exit belt, through which the sheet exits at a speed V2(t) different from the speed V1 (t), in particular at a constant speed, the sheet undergoing between the apron and the exit belt at least one turning around a roller whose axis is mounted movable, in particular in translation, in particular in the horizontal direction, and at least after the turning, the sheet is sandwiched between an air-permeable carpet and an air-impermeable carpet.
[0018] Suivant un premier mode de réalisation favorable, le tapis de sortie est perméable à l’air, le tablier est un brin supérieur d’un tapis sans fin imperméable à l’air et le retournement s’effectue à un des rouleaux autour desquels s’étend le tapis sans fin. [0018] According to a first favorable embodiment, the exit belt is permeable to air, the apron is an upper strand of an endless air-impermeable belt and the turning takes place at one of the rollers around from which the endless carpet extends.
[0019] Suivant un autre mode de réalisation favorable, il est prévu un tapis intermédiaire perméable à l’air sans fin entre le tablier et le tapis de sortie et le retournement de la nappe s’effectue autour d’un des rouleaux autour desquels s’étend le tapis intermédiaire sans fin, et de préférence, le tablier et le tapis de sortie font parties d’un même tapis sans fin et l’agencement est tel que la nappe est prise en sandwich avant le retournement, pendant le retournement et après le retournement entre le tapis intermédiaire sans fin et ledit même tapis sans fin, de préférence imperméable à l’air. [0019] According to another favorable embodiment, an endless air-permeable intermediate belt is provided between the apron and the outlet belt and the turning of the sheet takes place around one of the rollers around which 'extends the intermediate belt endlessly, and preferably, the apron and the exit belt are part of the same endless belt and the arrangement is such that the sheet is sandwiched before turning, during turning and after the reversal between the endless intermediate mat and said same endless mat, preferably airtight.
[0020] A titre d’exemples, il est décrit des modes de réalisation préférés de l’invention en se reportant aux dessins, dans lesquels : [0020] By way of examples, preferred embodiments of the invention are described with reference to the drawings, in which:
[0021 ] La figure 1 est une vue de côté d’une installation suivant l’invention, l’étaleur- nappeur étant sur la partie droite de la figure, le dispositif de compensation étant au centre et le dispositif de traitement ultérieur, disposé à gauche de la figure, n’étant pas représenté ; [0021] Figure 1 is a side view of an installation according to the invention, the spreader-lapper being on the right part of the figure, the compensation device being in the center and the subsequent processing device, arranged at left of the figure, not being shown;
[0022] La figure 2 est une vue à plus grande échelle de la machine de compensation de l’installation de la figure 1 ; [0023] La figure 3 est une vue schématique de côté d’une partie d’un étaleur-nappeur suivant un mode de réalisation de l’invention ; Figure 2 is a larger scale view of the compensation machine of the installation of Figure 1; [0023] Figure 3 is a schematic side view of a part of a spreader-lapper according to one embodiment of the invention;
[0024] La figure 4 est une vue schématique de côté d’une partie d’un étaleur-nappeur suivant un autre mode de réalisation de la présente invention ; [0024] Figure 4 is a schematic side view of a part of a spreader-lapper according to another embodiment of the present invention;
[0025] La figure 5 est une vue schématique de côté d’une partie d’un étaleur-nappeur suivant encore un autre mode de réalisation de l’invention ; [0025] Figure 5 is a schematic side view of a part of a spreader-lapper according to yet another embodiment of the invention;
[0026] La figure 6 est une vue schématique de côté partiellement arrachée de l’étaleur nappeur de la figure 3 ; [0026] Figure 6 is a partially broken schematic side view of the spreader spreader of Figure 3;
[0027] La figure 7 est une vue schématique de côté partiellement arrachée de l’étaleur nappeur de la figure 4 ; et [0027] Figure 7 is a partially broken schematic side view of the spreader spreader of Figure 4; And
[0028] La figure 8 est une vue schématique de côté partiellement arrachée de l’étaleur nappeur de la figure 5. [0028] Figure 8 is a partially broken schematic side view of the spreader spreader of Figure 5.
[0029] Aux figures 1 et 2, il est représenté un mode de réalisation d’une installation suivant l’invention. Celle-ci comporte un étaleur-nappeur 1 , délivrant par un tablier 2 de sortie, une nappe de fibres de non-tissés constituée d’un empilement de voiles de fibres déposés successivement en biais par rapport à la direction de déplacement longitudinale du tablier 2 par un chariot accumulateur (non visible à la figure) de l’étaleur-nappeur. [0029] In Figures 1 and 2, an embodiment of an installation according to the invention is shown. This comprises a spreader-lapper 1, delivering through an outlet apron 2, a sheet of non-woven fibers consisting of a stack of fiber webs deposited successively at an angle to the direction of longitudinal movement of the apron 2 by an accumulator carriage (not visible in the figure) of the spreader-lapper.
[0030] En aval de l’étaleur-nappeur 1 et de son tablier 2 de sortie, il est disposé une machine 3 de compensation, qui reçoit la nappe de fibres du tablier 2 sur un tronçon 4.1 amont d’un tapis 4 inférieur perméable à l’air, qui transporte la nappe de fibres jusqu’à un tronçon 4.2 aval de sortie du tapis 4 d’entrée, pour alimenter un dispositif de traitement ultérieur qui peut, par exemple, être une aiguilleteuse ou, comme représenté à la figure 1 , un étireur suivi d’une aiguilleteuse (non visible à la figure) . [0030] Downstream of the spreader-lapper 1 and its outlet apron 2, there is arranged a compensation machine 3, which receives the sheet of fibers from the apron 2 on a section 4.1 upstream of a permeable lower belt 4 in air, which transports the sheet of fibers to a downstream outlet section 4.2 of the inlet belt 4, to supply a subsequent processing device which can, for example, be a needling machine or, as shown in FIG. 1, a stretcher followed by a needling machine (not visible in the figure).
[0031 ] Le tapis 4 inférieur est sans fin et s’étend autour de rouleaux 6.1 , 6.2, 6.3, 6.4, 6.5 et 6.6. Parmi ces rouleaux 6.1 à 6.6, deux rouleaux respectivement 6.3 et 6.6 sont entraînés par des moteurs 7 inférieur et 8 supérieur. [0031] The lower belt 4 is endless and extends around rollers 6.1, 6.2, 6.3, 6.4, 6.5 and 6.6. Among these rollers 6.1 to 6.6, two rollers 6.3 and 6.6 respectively are driven by motors 7 lower and 8 upper.
[0032] Le tapis 4 inférieur comporte un premier tronçon amont sensiblement horizontal s’étendant entre le rouleau 6.1 , le plus proche de l’étaleur-nappeur ou rouleau 6.1 en amont, jusqu’à un premier rouleau 6.6 de retournement amont à 180° autour duquel il effectue un demi-tour à 180°, puis un tronçon allant jusqu’à un rouleau inférieur 6.5 de retournement aval où il effectue un demi-tour à 180° dans le sens opposé au demi-tour effectué au rouleau de retournement amont, pour ainsi renvoyer la nappe dans la même direction que celle suivant laquelle elle est entrée dans le tronçon amont d’entrée du tapis 4 inférieur, jusqu’à un tronçon 4.2 inférieur s’étendant jusqu’à un rouleau 6.4 d’extrémité aval. Le tapis 4 d’entrée comporte ensuite un tronçon inférieur entre le rouleau d’extrémité aval 6.4 et le rouleau 6.3 entraîné par le moteur 7, puis revient suivant un tronçon s’étendant entre le rouleau 6.3 et le rouleau 6.2, où il subit un retournement pour revenir au rouleau 6.1 . The lower belt 4 comprises a first substantially horizontal upstream section extending between the roller 6.1, closest to the spreader-lapper or roller 6.1 upstream, up to a first roller 6.6 for upstream reversal at 180° around from which it makes a 180° half-turn, then a section going up to a lower downstream turning roller 6.5 where it makes a 180° half-turn in the direction opposite to the half-turn made to the upstream turning roller, to thus return the sheet in the same direction as that in which it entered the upstream entry section of the lower belt 4, up to a lower section 4.2 extending to a downstream end roller 6.4. The entry belt 4 then comprises a lower section between the downstream end roller 6.4 and the roller 6.3 driven by the motor 7, then returns along a section extending between the roller 6.3 and the roller 6.2, where it undergoes a reversal to return to roll 6.1.
[0033] La nappe de fibres sortant du tablier 2 est supportée par le tapis 4 inférieur sur les premier et troisième tronçon ou tronçon amont d’entrée et tronçon d’extrémité aval de sortie, ainsi qu’autour des deux rouleaux de retournement amont et aval 6.6 et 6.5. [0033] The sheet of fibers emerging from the apron 2 is supported by the lower belt 4 on the first and third section or upstream entry section and downstream exit end section, as well as around the two upstream turning rollers and downstream 6.6 and 6.5.
[0034] Le dispositif comporte en outre un tapis 9 supérieur imperméable à l’air qui est sans fin et est entraîné autour de rouleaux 6.7, 6.8, 6.9 et 6.10, ainsi qu’autour des rouleaux 6.5 et 6.6. Le tapis 9 supérieur recouvre la nappe et la prend en sandwich avec le tapis 4 sur une partie du premier tronçon du tapis 4, une demi-circonférence du rouleau 6.6 de retournement amont, le tronçon intermédiaire entre les deux rouleaux de retournement amont 6.6 et aval 6.5, une demi-circonférence du rouleau 6.5 aval de retournement et une partie du tronçon 5 d’extrémité aval du tapis 4. The device further comprises an upper airtight belt 9 which is endless and is driven around rollers 6.7, 6.8, 6.9 and 6.10, as well as around rollers 6.5 and 6.6. The upper belt 9 covers the sheet and sandwiches it with the belt 4 on part of the first section of the belt 4, a half-circumference of the upstream turning roller 6.6, the intermediate section between the two upstream and downstream turning rollers 6.6 6.5, a half-circumference of the downstream turning roller 6.5 and part of the downstream end section 5 of the belt 4.
[0035] Le rouleau 6.5 de retournement aval est monté de manière à ce que son axe puisse se déplacer le long de rails 12 suivant une direction horizontale. Le moteur 8 du rouleau 6.6 de retournement amont est commandé en vitesse de sorte que le tronçon d’entrée du tapis 4 a une même vitesse que celle du tablier 2 de l’étaleur- nappeur 1. Le moteur 7 entraînant le rouleau 6.3 aval est commandé en vitesse de sortie pour réaliser une vitesse constante correspondant à la vitesse du tapis d’entrée du dispositif de traitement ultérieur, par exemple de l’aigu il leteuse. The downstream reversing roller 6.5 is mounted so that its axis can move along rails 12 in a horizontal direction. The motor 8 of the upstream turning roller 6.6 is speed controlled so that the entry section of the belt 4 has the same speed as that of the apron 2 of the spreader-lapper 1. The motor 7 driving the downstream roller 6.3 is controlled in output speed to achieve a constant speed corresponding to the speed of the input belt of the subsequent processing device, for example of the acute ileuse.
[0036] Ainsi, les deux moteurs 7 et 8 tournent à des vitesses différentes correspondant chacune, l’une à la vitesse du tapis 2 de sortie de l’étaleur-nappeur et l’autre 7 à la vitesse d’entrée du dispositif de traitement ultérieur, notamment de l’aiguil leteuse. La différence entre ces vitesses engendre une variation de la longueur du tronçon des tapis inférieur 4 et supérieur 9 qui s’étend entre les rouleaux 6.5 et 6.6, et cette variation est compensée par le mouvement des axes des rouleaux 6.5 et 6.2 pour le tapis inférieur 4 et par le mouvement des axes des rouleaux 6.5 et 6.10 pour le tapis supérieur 9, les autres axes des rouleaux étant fixes (les rouleaux sont quasi statiques, ne se déplaçant pas en translation, mais uniquement en rotation par rapport à leur axe respectif)). [0036] Thus, the two motors 7 and 8 rotate at different speeds each corresponding, one to the speed of the exit belt 2 of the spreader-lapper and the other 7 to the entry speed of the spreading device. further treatment, particularly of the needle. The difference between these speeds causes a variation in the length of the section of the lower belts 4 and upper 9 which extends between the rollers 6.5 and 6.6, and this variation is compensated by the movement of the axes of the rollers 6.5 and 6.2 for the lower belt 4 and by the movement of the axes of the rollers 6.5 and 6.10 for the upper belt 9, the other axes of the rollers being fixed (the rollers are quasi-static, not moving in translation, but only in rotation relative to their respective axis)).
[0037] Aux figures 3 et 6, il est représenté un étaleur-nappeur suivant l’invention, dans lequel est incorporé un dispositif de compensation. L’ étaleur-nappeur des figures 3 et 6 comporte un tapis 303’ avant, notamment sans fin, amenant le voile de fibres dans l’étaleur-nappeur jusqu’à un chariot d’entrée ou accumulateur, un tapis arrière 302’ amenant le voile accumulé jusqu’à un chariot nappeur ou de dépose et un tablier 100’ sur lequel le chariot nappeur dépose le voile accumulé par le chariot accumulateur alternativement en biais dans un sens et dans l’autre pour former une nappe se déplaçant à une vitesse V1 (t) qui varie en fonction du temps, notamment de manière périodique. L’étaleur-nappeur comportant en outre un tapis de sortie, par lequel sort la nappe à une vitesse V2(t) différente de la vitesse V1 (t), notamment à une vitesse constante. L’étaleur nappeur comporte un tablier 100’ sur un brin 2’ supérieur duquel est déposé en zigzag par le chariot de dépose le voile en plusieurs couches pour former une nappe N, le tablier 100’ étant entraîné autour de quatre rouleaux 3. T, 3.2’, 3.3’ et 3.4’ dont au moins l’un est moteur. Un tapis sans fin perméable à l’air constitue un tapis 200’ de sortie de l’étaleur- nappeur sur un brin 20’ supérieur duquel la nappe sort de l’étaleur nappeur. Ce tapis 200’ de sortie sans fin est représenté de manière schématique et est entraîné de la même manière par des rouleaux qui tournent à vitesse constante ou synchronisés avec le dispositif de traitement ultérieur. La nappe N subit un retournement autour du rouleau 3.2’ pour venir être prise en sandwich entre un brin inférieur, à l’opposé du brin 2’ supérieur, du tablier imperméable à l’air et le brin 20’ supérieur du tapis de sortie. [0037] In Figures 3 and 6, a spreader-lapper according to the invention is shown, in which a compensation device is incorporated. The spreader-lapper of Figures 3 and 6 comprises a front belt 303', in particular endless, bringing the web of fibers in the spreader-lapper to an input carriage or accumulator, a rear belt 302' bringing the web accumulated up to a lapper or depositing carriage and an apron 100' on which the lapper carriage deposits the web accumulated by the accumulator carriage alternately at an angle in one direction and the other to form a web moving at a speed V1 (t) which varies over time, particularly periodically. The spreader-lapper further comprising an exit belt, through which the web exits at a speed V2(t) different from the speed V1 (t), in particular at a constant speed. The spreader spreader comprises an apron 100' on an upper strand 2' of which is deposited in a zigzag manner by the carriage for depositing the web in several layers to form a sheet N, the apron 100' being driven around four rollers 3. T, 3.2', 3.3' and 3.4' of which at least one is a motor. An endless air-permeable belt constitutes a 200' exit belt from the spreader-lapper on a 20' upper strand from which the web leaves the spreader-lapper. This 200' endless output belt is shown schematically and is driven in the same way by rollers which rotate at constant speed or synchronized with the subsequent processing device. The N sheet undergoes an inversion around the 3.2' roller to be sandwiched between a lower strand, opposite the upper 2' strand, of the airtight apron and the upper 20' strand of the exit belt.
[0038] Les axes des deux rouleaux supérieurs 3. T et 3.4’ sont montés fixes tandis que les axes des rouleaux 3.2’ et 3.3’ sont montés mobiles solidaires en translation horizontale, suivant un mouvement de va et vient, pour ainsi pouvoir adapter la vitesse de déplacement de la nappe qui passe du brin 2’, ayant une vitesse variable en fonction du temps, au brin 20’ dont la vitesse, notamment constante, est égale à la vitesse du tapis d’entrée du dispositif de traitement ultérieur. Pendant le mouvement de va et vient des rouleaux 3.2’ et 3.3’, le tapis sans fin formant le tablier 100’ conserve une longueur totale constante. [0038] The axes of the two upper rollers 3. T and 3.4' are mounted fixed while the axes of the rollers 3.2' and 3.3' are mounted movable together in horizontal translation, following a back and forth movement, thus being able to adapt the speed of movement of the sheet which passes from the strand 2', having a variable speed as a function of time, to the strand 20' whose speed, in particular constant, is equal at the speed of the input belt of the further processing device. During the back and forth movement of the rollers 3.2' and 3.3', the endless belt forming the apron 100' maintains a constant total length.
[0039] Les figures 4 et 7 représentent un autre mode de réalisation. L’étaleur-nappeur des figures 4 et 7 comporte un tapis 303” avant, notamment sans fin, amenant le voile de fibres dans l’étaleur-nappeur jusqu’à un chariot d’entrée ou accumulateur, un tapis arrière 302” amenant le voile accumulé jusqu’à un chariot nappeur ou de dépose et un tablier 100” sur lequel le chariot nappeur dépose le voile accumulé par le chariot accumulateur alternativement en biais dans un sens et dans l’autre pour former une nappe se déplaçant à une vitesse V1 (t) qui varie en fonction du temps, notamment de manière périodique. L’étaleur-nappeur comportant en outre un tapis de sortie, par lequel sort la nappe à une vitesse V2(t) différente de la vitesse V1 (t), notamment à une vitesse constante. Le brin 2” supérieur du tablier 100” sous la forme d’un tapis sans fin imperméable à l’air est entraîné autour de rouleaux 3.1 ”, 3.2”, 3.3” et 3.4” d’axes fixes, dont au moins l’un est moteur. Il est prévu un tapis 30” sans fin, intermédiaire, perméable à l’air, disposé entre le tablier 100” et un brin 20” d’un tapis 200” de sortie, le tapis 30” intermédiaire étant entraîné entre deux rouleaux 4.1 ” et 4.2”, dont de préférence au moins l’un est moteur. Les axes des rouleaux 4.1 ” et 4.2” sont montés mobiles solidaires en translation dans la direction horizontale, suivant un mouvement de va et vient, pour ainsi adapter la vitesse de déplacement de la nappe qui passe du brin 2” supérieur ayant une vitesse variable en fonction du temps, au brin 20” supérieur du tapis de sortie dont la vitesse, notamment constante, est égale à la vitesse du tapis d’entrée du dispositif de traitement ultérieur. Figures 4 and 7 represent another embodiment. The spreader-lapper of Figures 4 and 7 comprises a front belt 303”, in particular endless, bringing the web of fibers in the spreader-lapper to an input carriage or accumulator, a rear belt 302” bringing the web accumulated up to a lapper or depositing carriage and a 100” apron on which the lapper carriage deposits the web accumulated by the accumulator carriage alternately at an angle in one direction and the other to form a web moving at a speed V1 (t) which varies over time, particularly periodically. The spreader-lapper further comprising an exit belt, through which the web exits at a speed V2(t) different from the speed V1 (t), in particular at a constant speed. The upper 2” strand of the 100” apron in the form of an endless airtight belt is driven around 3.1”, 3.2”, 3.3” and 3.4” rollers with fixed axes, at least one of which is driving force. An endless, intermediate, air-permeable 30” belt is provided, placed between the 100” apron and a 20” strand of a 200” outlet belt, the intermediate 30” belt being driven between two 4.1” rollers. and 4.2”, preferably at least one of which is a motor. The axes of the 4.1” and 4.2” rollers are mounted movable together in translation in the horizontal direction, following a back and forth movement, to thus adapt the speed of movement of the sheet which passes from the upper 2” strand having a variable speed in function of time, at the upper 20” strand of the output belt whose speed, notably constant, is equal to the speed of the input belt of the subsequent processing device.
[0040] Dans ce mode de réalisation, la nappe N subit un retournement autour du rouleau 4.1 ”. Avant le retournement, elle est prise en sandwich entre un brin inférieur du tablier, tourné à l’opposé du brin 2”supérieur et un brin supérieur du tapis 30” intermédiaire. Après le retournement, elle est prise en sandwich entre le brin 20” supérieur du tapis de sortie et un brin inférieur du tapis 30” intermédiaire. Le brin inférieur du tapis 30” intermédiaire est tourné à l’opposé du brin supérieur du tapis 30” intermédiaire. Pendant le mouvement de va et vient des rouleaux 4.1 ” et 4.2”, le tapis sans fin formant le tapis intermédiaire conserve une longueur totale constante. [0041 ] Enfin, aux figures 5 et 8, il est représenté un troisième mode de réalisation. L’étaleur-nappeur des figures 5 et 8 comporte un tapis 303”’ avant, notamment sans fin, amenant le voile de fibres dans l’étaleur-nappeur jusqu’à un chariot d’entrée ou accumulateur, un tapis arrière 302’” amenant le voile accumulé jusqu’à un chariot nappeur 304’” ou de dépose et un tablier 100’” sur lequel le chariot 304’” nappeur dépose le voile accumulé par le chariot 30T” accumulateur alternativement en biais dans un sens et dans l’autre pour former une nappe se déplaçant à une vitesse V1 (t) qui varie en fonction du temps, notamment de manière périodique. L’étaleur-nappeur comportant en outre un tapis de sortie (qui, dans ce mode de réalisation, est une partie du tablier 100’”), par lequel sort la nappe à une vitesse V2(t) différente de la vitesse V1 (t), notamment à une vitesse constante. Un brin supérieur 2’” d’un tablier 100’” sous la forme d’un tapis sans fin imperméable à l’air s’étend autour de rouleaux 3. T” à 3.7’”, le brin supérieur 2’”, sur lequel est déposée la nappe N par le chariot nappeur, s’étend entre deux rouleaux supérieurs 3. T” et 3.4’”. La nappe N subit un premier retournement autour du rouleau 3.3’” de retournement supérieur et est ensuite prise en sandwich entre un brin supérieur intermédiaire, tourné à l’opposé du brin supérieur 2’” du tablier, qui s’étend entre le rouleau 3.3’” de retournement supérieur et un rouleau 3.7’” de retournement inférieur, et un brin supérieur d’un tapis 30’” intermédiaire sans fin qui s’étend autour du rouleau 3.7’” et d’un rouleau 3.8’”. La nappe subit ensuite, autour du rouleau 3.7’” de retournement inférieur, un deuxième retournement à 180°, dans un sens opposé au premier retournement, pour être alors supportée par un brin 20’” inférieur de tapis de sortie du tablier s’étendant entre le rouleau 3.7’” de retournement et un rouleau 3.6’” inférieur d’extrémité aval, la nappe sortant de l’étaleur-nappeur sur le brin 20’” inférieur de sortie. [0040] In this embodiment, the sheet N undergoes an inversion around the roller 4.1”. Before turning, it is sandwiched between a lower strand of the apron, facing opposite the upper 2” strand, and an upper strand of the intermediate 30” belt. After turning, it is sandwiched between the upper 20” strand of the exit belt and a lower strand of the intermediate 30” belt. The lower strand of the intermediate 30” belt is facing away from the upper strand of the intermediate 30” belt. During the back and forth movement of the 4.1” and 4.2” rollers, the endless belt forming the intermediate belt maintains a constant total length. [0041] Finally, in Figures 5 and 8, a third embodiment is shown. The spreader-lapper of Figures 5 and 8 comprises a front belt 303'', in particular endless, bringing the web of fibers in the spreader-lapper to an input carriage or accumulator, a rear belt 302'' bringing the accumulated web to a lapper carriage 304'” or deposit and an apron 100'' on which the lapper carriage 304'' deposits the web accumulated by the accumulator carriage 30T'' alternately at an angle in one direction and in the another to form a sheet moving at a speed V1 (t) which varies as a function of time, in particular periodically. The spreader-lapper further comprising an exit belt (which, in this embodiment, is a part of the apron 100'”), through which the web exits at a speed V2(t) different from the speed V1 (t ), especially at a constant speed. An upper 2'” strand of a 100'” apron in the form of an endless airtight mat extends around 3. T rollers at 3.7'”, the upper 2'” strand, on which is deposited the web N by the lapper carriage, extends between two upper rollers 3. T” and 3.4'”. The sheet N undergoes a first turning around the upper turning roller 3.3'” and is then sandwiched between an intermediate upper strand, turned opposite the upper strand 2'” of the apron, which extends between the roller 3.3 '” of upper turning and a 3.7'' roller of lower turning, and an upper strand of an endless intermediate 30'' belt which extends around the 3.7'' roller and a 3.8'' roller. The sheet then undergoes, around the 3.7'' lower turning roller, a second 180° turning, in a direction opposite to the first turning, to then be supported by a lower 20'' strand of exit belt from the apron extending between the 3.7'' turning roller and a lower 3.6'' downstream end roller, the web leaving the spreader-lapper on the lower 20'' exit strand.
[0042] Le brin supérieur du tapis 30’” intermédiaire prend en sandwich la nappe avec le brin supérieur intermédiaire du tablier 2’” entre les deux rouleaux de retournement respectivement 3.3’” et 3.7’” puis le brin inférieur du tapis 30’” intermédiaire prend en sandwich la nappe avec le brin 20’” inférieur de tapis sortie du tablier entre le rouleau de retournement 3.7’” et un rouleau 3.8’” d’extrémité aval du tapis intermédiaire 30’”. Le tapis intermédiaire 30’” est perméable à l’air et est entraîné autour des deux rouleaux 3.7’” et 3.8’” qui sont montés mobiles solidaires en translation suivant un mouvement de va et vient de manière à ce que leurs axes se déplacent en translation pour adapter la vitesse de déplacement de la nappe qui passe du brin 2” supérieur du tablier 200”, ayant une vitesse variable en fonction du temps, au brin inférieur 20”’ du tablier 200”’ dont la vitesse, notamment constante, est égale à la vitesse du tapis d’entrée du dispositif de traitement ultérieur. [0042] The upper strand of the intermediate 30'" belt sandwiches the tablecloth with the upper intermediate strand of the 2'" apron between the two turning rollers respectively 3.3'' and 3.7'' then the lower strand of the 30'' belt intermediate sandwiches the ply with the lower 20'” strand of belt exiting the apron between the 3.7'' turning roller and a 3.8'' roller at the downstream end of the 30'' intermediate belt. The 30'” intermediate belt is permeable to air and is driven around the two rollers 3.7'' and 3.8'' which are mounted movable together in translation following a back and forth movement so that their axes move in translation to adapt the speed of movement of the sheet which passes from the upper 2” strand of the apron 200”, having a variable speed as a function of time, to the lower 20” strand of the apron 200”, whose speed , notably constant, is equal to the speed of the input belt of the subsequent processing device.
[0043] La nappe est prise en sandwich entre le tablier et le tapis 30’” intermédiaire avant le deuxième retournement, pendant le deuxième retournement, autour du rouleau 3.7’”, et après le deuxième retournement, et est ainsi bien protégé contre des effets nocifs de forces d’entraînement et/ou centrifuge liées aux déplacements en translation et en rotation des rouleaux 3.7’” et 3.8’” [0043] The tablecloth is sandwiched between the apron and the intermediate 30'' belt before the second turning, during the second turning, around the 3.7'' roller and after the second turning, and is thus well protected against the effects harmful driving and/or centrifugal forces linked to the translational and rotational movements of the 3.7’” and 3.8’” rollers
[0044] Aux modes de réalisation des figures 4 et 5, on peut envisager de faire tourner les tapis intermédiaires respectivement 30” et 30’” dans le sens opposé pour permettre, en fonction de l’épaisseur de la nappe, de lui faire subir ou non le retournement. Si on ne souhaite pas lui faire subir le retournement, notamment dans le cas de nappes très épaisses, par exemple supérieur à 150mm, on fait tourner les tapis 30” et 30’” dans le sens opposé à celui décrit aux figures et la nappe est déposé directement sur le brin 20”, respectivement 20’”, de tapis de sortie, après passage en cascade sur les rouleaux respectivement 3.3” et 4.2” pour la figure 4 et les rouleaux 3.3’” et 3.8’” pour la figure 5. [0044] In the embodiments of Figures 4 and 5, it is possible to envisage rotating the intermediate belts respectively 30” and 30'” in the opposite direction to allow, depending on the thickness of the sheet, to subject it to or not the reversal. If we do not wish to subject it to inversion, particularly in the case of very thick layers, for example greater than 150mm, we rotate the 30” and 30’” belts in the direction opposite to that described in the figures and the tablecloth is deposited directly on the 20", respectively 20'", strand of the exit belt, after cascading over the rollers respectively 3.3" and 4.2" for figure 4 and the rollers 3.3'" and 3.8'" for figure 5.
[0045] Au mode de réalisation de la figure 3, on peut envisager de mettre en œuvre deux sorties, une à droite comme représenté, notamment pour les nappes peu épaisses, par exemple ayant une épaisseur inférieure ou égale à 150mm et une sortie directement à gauche sans passer sous le tablier, pour les nappes épaisses, notamment ayant une épaisseur comprise entre 300 et 500mm. [0045] In the embodiment of Figure 3, it is possible to envisage implementing two outlets, one on the right as shown, particularly for thin layers, for example having a thickness less than or equal to 150mm and an outlet directly at left without passing under the apron, for thick layers, in particular having a thickness between 300 and 500mm.
[0046] Les figures 6 à 8 sont partiellement arrachées pour permettre de voir les tapis d’entrée et de sortie et les chariots d’entrée et de dépose. | [0046] Figures 6 to 8 are partially torn away to allow us to see the entry and exit belts and the entry and deposit carts. |

Claims

Revendications Claims
[Revendication 1 ] Etaleur-nappeur, notamment disposé à la sortie d’un dispositif de carde produisant un voile de fibres, notamment de non-tissés, comportant un tapis avant amenant le voile de fibres dans l’étaleur-nappeur jusqu’à un chariot d’entrée ou accumulateur, un tapis arrière amenant le voile accumulé jusqu’à un chariot nappeur et un tablier sur un brin supérieur (2’; 2”; 2’”) duquel le chariot nappeur dépose le voile accumulé par le chariot accumulateur alternativement en biais dans un sens et dans l’autre pour former une nappe (N) se déplaçant à une vitesse V1 (t) qui varie en fonction du temps, notamment de manière périodique, l’étaleur-nappeur comportant en outre un brin (20’; 20”; 20’”) de tapis de sortie, sur lequel la nappe (N) sort de l’étaleur- nappeur à une vitesse V2(t) différente de la vitesse V1 (t), notamment à une vitesse constante, la nappe (N) subissant entre le brin supérieur (2’; 2”; 2’”) et le brin (20’; 20”; 20’”) de tapis de sortie au moins un retournement, notamment à 180°, autour d’un rouleau (3.2’; 4.1 ”; 3.7’”) monté mobile en translation le long du brin (20’; 20”; 20’”) de tapis de sortie, la nappe (N) étant prise en sandwich entre un autre brin, tourné à l’opposé du brin supérieur (2’), du tablier et le brin (20’) de tapis de sortie et/ou entre un autre brin, tourné à l’opposé du brin supérieur (2”; 2’”), du tablier et un brin supérieur d’un tapis intermédiaire (30”; 30’”) et/ou entre un brin inférieur d’un tapis intermédiaire (30”; 30’”) et le brin (20”; 20’”) de tapis de sortie. [Claim 1] Spreader-lapper, in particular arranged at the outlet of a carding device producing a web of fibers, in particular non-wovens, comprising a front belt bringing the web of fibers into the spreader-lapper up to a entry trolley or accumulator, a rear belt bringing the accumulated web to a lapper trolley and an apron on an upper section (2'; 2”; 2'”) from which the lapper trolley deposits the web accumulated by the accumulator trolley alternately obliquely in one direction and the other to form a sheet (N) moving at a speed V1 (t) which varies as a function of time, in particular periodically, the spreader-lapper further comprising a strand ( 20'; 20”; 20'”) of exit belt, on which the web (N) leaves the spreader-lapper at a speed V2(t) different from the speed V1 (t), in particular at a constant speed , the sheet (N) undergoing between the upper strand (2'; 2”; 2'”) and the strand (20'; 20”; 20'”) of the exit belt at least one reversal, in particular at 180°, around a roll (3.2'; 4.1”; 3.7'”) mounted movable in translation along the strand (20'; 20”; 20'”) of exit belt, the sheet (N) being sandwiched between another strand, turned opposite the upper strand (2'), of the apron and the strand (20') of the exit belt and/or between another strand, turned opposite the upper strand (2”; 2'”), of the apron and an upper strand of 'an intermediate belt (30”; 30'”) and/or between a lower strand of an intermediate belt (30”; 30'”) and the strand (20”; 20'”) of the exit belt.
[Revendication 2] Etaleur nappeur suivant la revendication 1 , caractérisé en ce que le rouleau (3.2’, 4.1 ”, 3.7’”) est monté mobile en translation dans une direction parallèle au brin supérieur (2’; 2”; 2’”), notamment la direction horizontale. [Claim 2] Lapper spreader according to claim 1, characterized in that the roller (3.2', 4.1”, 3.7'”) is mounted movable in translation in a direction parallel to the upper strand (2'; 2”; 2'” ), especially the horizontal direction.
[Revendication 3] Etaleur nappeur suivant la revendication 1 ou 2, caractérisé en ce que le dit autre brin, tourné à l’opposé du brin (2’) supérieur, s’étend entre deux rouleaux (3.2’, 3.3’) montés mobiles solidaires en translation, notamment suivant un mouvement de va et vient. [Claim 3] Lapper spreader according to claim 1 or 2, characterized in that said other strand, turned opposite the upper strand (2'), extends between two rollers (3.2', 3.3') mounted movable united in translation, in particular following a back and forth movement.
[Revendication 4] Etaleur nappeur suivant la revendication 1 ou 2, caractérisé en ce que le brin supérieur du tapis intermédiaire (30”; 30’”) s’étend entre deux rouleaux (4.1 ”, 4.2”; 3.7’”, 3.8’”) montés mobiles solidaires en translation, notamment suivant un mouvement de va et vient. [Claim 4] Lapper spreader according to claim 1 or 2, characterized in that the upper strand of the intermediate belt (30”; 30'”) extends between two rollers (4.1”, 4.2”; 3.7'”, 3.8'") mounted mobile together in translation, in particular following a back and forth movement.
[Revendication 5] Etaleur nappeur suivant la revendication 1 , 2 ou 4, caractérisé en ce que le brin inférieur du tapis intermédiaire (30”; 30”’) s’étend entre deux rouleaux (4.1 ”, 4.2”; 3.7’”, 3.8’”) montés mobiles solidaires en translation, notamment suivant un mouvement de va et vient. [Claim 5] Lapper spreader according to claim 1, 2 or 4, characterized in that the lower strand of the intermediate belt (30”; 30”’) extends between two rollers (4.1”, 4.2”; 3.7’”) 3.8'') mounted mobile together in translation, particularly following a back and forth movement.
[Revendication 6] Etaleur nappeur suivant la revendication 5, caractérisé en ce que le tapis intermédiaire (30”; 30’”) est un tapis sans fin mobile en translation suivant un mouvement de va et vient qui s’étend autour des deux rouleaux (4.1 ”, 4.2”; 3.7’”, 3.8’”) montés mobiles solidaires en translation.[Claim 6] Lapper spreader according to claim 5, characterized in that the intermediate belt (30”; 30'”) is an endless belt movable in translation following a back and forth movement which extends around the two rollers ( 4.1”, 4.2”; 3.7'”, 3.8'”) mounted mobile in translation.
[Revendication 7] Etaleur-nappeur suivant l’une des revendications précédentes, caractérisé en ce que le tapis de sortie est perméable à l’air et le tablier est un tapis imperméable à l’air, notamment sans fin. [Claim 7] Spreader-lapper according to one of the preceding claims, characterized in that the exit belt is air-permeable and the apron is an air-impermeable carpet, in particular endless.
[Revendication 8] Etaleur-nappeur suivant l’une des revendications précédentes dans lesquelles il est prévu le tapis (30” ; 30’”) intermédiaire, caractérisé en ce que le tapis (30”; 30’”) intermédiaire est perméable à l’air. [Claim 8] Spreader-lapper according to one of the preceding claims in which the intermediate mat (30”; 30'”) is provided, characterized in that the intermediate mat (30”; 30'”) is permeable to the 'air.
[Revendication 9] Etaleur-nappeur suivant l’une des revendications précédentes, caractérisé en ce que le brin supérieur (2’”) du tablier et le brin (20’”) de tapis de sortie font partis d’un même tapis sans fin et l’agencement est tel que la nappe (N) est prise en sandwich avant le retournement, pendant le retournement et après le retournement entre le tapis (30’”) intermédiaire sans fin et ledit même tapis sans fin. [Claim 9] Spreader-lapper according to one of the preceding claims, characterized in that the upper strand (2'”) of the apron and the strand (20'”) of the exit belt are part of the same endless belt and the arrangement is such that the sheet (N) is sandwiched before turning, during turning and after turning between the intermediate endless belt (30'') and said same endless belt.
[Revendication 10] Installation comportant un étaleur-nappeur suivant l’une des revendications précédentes et un dispositif de traitement ultérieur disposé directement en aval de l’étaleur-nappeur (1 ), et ayant un tapis d’entrée se déplaçant à la vitesse V2(t). [Claim 10] Installation comprising a spreader-lapper according to one of the preceding claims and a subsequent processing device arranged directly downstream of the spreader-lapper (1), and having an entry belt moving at speed V2 (t).
PCT/EP2023/070510 2022-07-25 2023-07-25 Buffer device for matching the output speed of a lap of a spreading-lapping machine to the input speed of a device for processing the lap downstream of the spreading-lapping machine WO2024023049A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2207596A FR3138154A1 (en) 2022-07-25 2022-07-25 Buffer device for adapting the exit speed of a web from a lapper spreader to the entry speed of a web treatment device downstream of the lapper spreader
FRFR2207596 2022-07-25

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0229595A1 (en) * 1985-12-11 1987-07-22 FONDERIE OFFICINE RIUNITE F.O.R. ING. GRAZIANO DI L. GRAZIANO & C. S.a.s. Device for superposing card webs to obtain a fleece with fibres arranged longitudinally
US6195844B1 (en) * 1997-11-07 2001-03-06 Asselin Method and devices for producing a textile fleece
EP1897979A2 (en) * 2006-09-11 2008-03-12 Asselin-Thibeau Method and system of producing a multi-layer fleece, in particular using a scutcher and lap machine
FR2930563A1 (en) 2008-04-28 2009-10-30 Asselin Thibeau Soc Par Action BUFFER DEVICE AND SYSTEM FOR PRODUCING NON-WOVEN WEB

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE353380T1 (en) * 2004-03-08 2007-02-15 Dilo Kg Maschf Oskar FLEECE LAYING DEVICE

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0229595A1 (en) * 1985-12-11 1987-07-22 FONDERIE OFFICINE RIUNITE F.O.R. ING. GRAZIANO DI L. GRAZIANO & C. S.a.s. Device for superposing card webs to obtain a fleece with fibres arranged longitudinally
US6195844B1 (en) * 1997-11-07 2001-03-06 Asselin Method and devices for producing a textile fleece
EP1897979A2 (en) * 2006-09-11 2008-03-12 Asselin-Thibeau Method and system of producing a multi-layer fleece, in particular using a scutcher and lap machine
FR2930563A1 (en) 2008-04-28 2009-10-30 Asselin Thibeau Soc Par Action BUFFER DEVICE AND SYSTEM FOR PRODUCING NON-WOVEN WEB

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