EP0997538B1 - Machine for finishing hides and the like - Google Patents
Machine for finishing hides and the like Download PDFInfo
- Publication number
- EP0997538B1 EP0997538B1 EP99121275A EP99121275A EP0997538B1 EP 0997538 B1 EP0997538 B1 EP 0997538B1 EP 99121275 A EP99121275 A EP 99121275A EP 99121275 A EP99121275 A EP 99121275A EP 0997538 B1 EP0997538 B1 EP 0997538B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- skin
- area
- contact
- machine
- guide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
- C14B17/00—Details of apparatus or machines for manufacturing or treating skins, hides, leather, or furs
- C14B17/06—Work feeding or clamping devices
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
- C14B1/00—Manufacture of leather; Machines or devices therefor
- C14B1/44—Mechanical treatment of leather surfaces
- C14B1/56—Ornamenting, producing designs, embossing
Definitions
- the present invention a machine for finishing skins and the like, according to the preamble of claim 1.
- roller machines in which the skins are transported by a roller or by a rubber mat and pressed against an opposite, engraved roller, which deposits on the surface of the skin a uniform film of liquid, which has been previously distributed on the engraved roller itself by one or more doctor blade blades.
- the engraved roller can rotate in "synchro", that is to say in the direction concordant with the direction of advancement of the skin or in "reverse”, that is to say in direction reverse of said sense of skin.
- the perfect success of the skin finishing operation depends on many factors, among which the predominant ones are regular entry of the skin into the constricted area, i.e. that between the engraved roller and the roller or carpet underlying carrier, and a well-defined compressive force of the portion of skin which comes into contact, almost tangently, with the surface of said engraved roller.
- all known solutions provide guide elements placed in the immediate vicinity of the constricted area and suitable for resulting in contact with the upper surface of the skin.
- the object of the present invention is to provide a device to be applied to a "reverse" roller bumper machine which guarantees regular advancement of the skin in the tightened working area.
- the converging profile of the guide member has a lower surface which comes into contact with the skin without exerting any type of pressure on the skin itself, while said surface will further delimit the introduction channel of the skin in the constricted area and is provided with means for reducing the contact area between this surface and this skin, like notches arranged with their axis parallel to the direction of advancement of the skin or with their axis diverging with respect to this steering, arranged symmetrically with respect to the median of the guide member himself.
- said guide member is mounted on supports sliding so that, in case the anterior part of the skin lifts and, being driven by the engraved cylinder, it turns against the guide member, that said guide member, thanks to its sliding support, is pushed back, and that abnormal movement comes to excite a micro switch which immediately stops the operation of the machine and removes this body definitively from the constricted area, thus promoting the extraction of the skin.
- the skins 1 are introduced into the zone tightened 2 working, defined by the engraved roller 3 and by the conveyor belt 4 placed below the roll, by means of devices known per se such as a pair opposite belts 5 and 6 which delimit a supply channel 7.
- the engraved roller 3, fitted with the doctor blade 8, which contains the chemical finishing liquid 9, turns in “reverse” mode, according to arrow 10, that is to say in the opposite direction to the direction of advancement of the skins (arrow 11) and to the direction advancement (arrow 12) of the conveyor belt 4.
- a guide 14 placed immediately upstream of said constricted zone, which member, provided with a converging profile or end 15, penetrates as much as possible into this zone and extends over the entire width, or transverse dimension, thereof.
- the lower surface 16 of the converging profile 15 will be placed near the skin portion 17 placed immediately upstream of the constricted area.
- notches or grooves 18 which reduce the contact area between said surface and the skin 17, as is can see it in Fig. 3.
- the profile of the notches 18 can take different conformations, depending on the type of skins to be treated, presenting their ridges in a shape which goes from the rounded shape 19 to a flat shape 20.
- the guide member 14 is slidably mounted, by means of the stirrups 21, on the bars 22 so that, when the skin 1, driven by the engraved roller 3, lifts and turns over (see detail of Fig. 6), said member is pushed back, going to request the microswitch 23 which stops the operation of the machine.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Fiber Materials (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
- Advancing Webs (AREA)
- Glass Compositions (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
Description
La présente invention une machine pour la finition des peaux et analogues, selon
le préambule de la revendication 1.The present invention a machine for finishing skins and the like, according to
the preamble of
Ainsi qu'il est connu, pour l'exécution de l'opération de finition dans le domaine de la tannerie, on utilise en particulier des machines à rouleaux, appelées plus communément tamponneuses, dans lesquelles les peaux sont transportées par un rouleau ou par un tapis en caoutchouc et pressées contre un rouleau opposé, gravé, qui dépose sur la surface de la peau une pellicule de liquide uniforme, qui a été préalablement distribuée sur le rouleau gravé lui-même par une ou plusieurs lames de racles.As is known, for the execution of the finishing operation in the field tanning, we use in particular roller machines, called more commonly bumper, in which the skins are transported by a roller or by a rubber mat and pressed against an opposite, engraved roller, which deposits on the surface of the skin a uniform film of liquid, which has been previously distributed on the engraved roller itself by one or more doctor blade blades.
Le rouleau gravé peut tourner en « synchro », c'est-à-dire dans le sens concordant avec le sens d'avancement de la peau ou en « inverse », c'est-à-dire en sens inverse dudit sens de la peau.The engraved roller can rotate in "synchro", that is to say in the direction concordant with the direction of advancement of the skin or in "reverse", that is to say in direction reverse of said sense of skin.
La parfaite réussite de l'opération de finition des peaux dépend de nombreux facteurs, parmi lesquels les prédominants sont une entrée régulière de la peau dans la zone resserrée, c'est-à-dire celle comprise entre le rouleau gravé et le rouleau ou tapis transporteur sous-jacent, et une force bien déterminée de compression de la portion de peau qui entre en contact, de façon quasi tangente, avec la surface dudit rouleau gravé.The perfect success of the skin finishing operation depends on many factors, among which the predominant ones are regular entry of the skin into the constricted area, i.e. that between the engraved roller and the roller or carpet underlying carrier, and a well-defined compressive force of the portion of skin which comes into contact, almost tangently, with the surface of said engraved roller.
Avec la rotation « inverse », on réalise une couverture optimale de la peau mais l'avancement de la peau elle-même dans la zone resserrée comprise entre le cylindre gravé et le rouleau ou tapis transporteur en caoutchouc sous-jacent devient problématique parce que la peau, entraínée par ledit rouleau ou tapis, doit posséder une rigidité capable de vaincre la force de frottement antagoniste dudit rouleau gravé, qui s'oppose à son avancement. With the “reverse” rotation, optimal skin coverage is achieved, but the advancement of the skin itself in the constricted area between the cylinder engraved and the underlying rubber conveyor roller or mat becomes problematic because the skin, entrained by said roller or carpet, must have a rigidity capable of overcoming the opposing friction force of said engraved roller, which opposes his advancement.
Dans le cas où la peau, indépendamment de son épaisseur, est du type dit « souple » et par conséquent d'une rigidité insuffisante pour vaincre la force antagoniste engendrée par le frottement du cylindre gravé, il arrive que le coin ou bord avant de ladite peau se soulève de la surface du tapis d'introduction, en perdant ainsi la force d'entraínement engendrée par le frottement du tapis, au point d'être repoussée par le cylindre gravé.In the case where the skin, regardless of its thickness, is of the so-called type "Flexible" and therefore of insufficient rigidity to overcome the opposing force generated by the friction of the engraved cylinder, it happens that the corner or edge before said skin lifts off the surface of the introductory mat, thereby losing strength of training generated by the friction of the carpet, to the point of being repelled by the engraved cylinder.
Dans l'état actuel de la technique, on connaít différentes solutions de construction aptes à rendre aisée l'introduction et l'avancement de la peau dans la zone resserrée, qui se présente essentiellement comme un canal convergent/divergent dont l'épaisseur de la section minimale de passage est égale ou légèrement inférieure à l'épaisseur de la peau en cours de travail mais aucune de ces solutions ne permet le travail de peaux souples dans le travail « inverse ».In the current state of the art, we know different solutions of construction capable of making the introduction and advancement of the skin into the area easy constricted, which essentially presents itself as a converging / diverging channel whose the thickness of the minimum passage section is equal to or slightly less than the thickness of the skin during work but none of these solutions allows the flexible skin work in "reverse" work.
Plus précisément, toutes les solutions connues prévoient des éléments de guidage placés dans le voisinage immédiat de la zone resserrée et propres à se traduire par un contact avec la surface supérieure de la peau.More specifically, all known solutions provide guide elements placed in the immediate vicinity of the constricted area and suitable for resulting in contact with the upper surface of the skin.
On citera, à titre d'exemple, la demande de brevet européen n° 91118048.7
(& EP-A-0 484 740), qui représente le préambule de la revendication 1, le
brevet suisse n° 00901/87-4 et les demandes de brevets italiens n° TO 95A000137 et n°
TO 96A000001, où l'on décrit des dispositifs de pressage, placés en amont dans la zone
resserrée de passage, mais qui ne résolvent que partiellement les problèmes de
fonctionnement énumérés plus haut, en ce sens qu'en guidant les peaux dans la région
resserrée, ils viennent en contact avec la surface supérieure de la peau elle-même, en la
freinant et en engendrant par conséquent une force antagoniste à la force d'avancement
engendrée par le frottement du tapis, qui détermine la rotation du bord antérieur de la
peau vers le haut, en augmentant l'effet de refus exercé par le cylindre gravé. By way of example, mention may be made of European patent application No. 91118048.7
(& EP-A-0 484 740), which represents the preamble of
Dans la demande de brevet n° VI97A000165, on décrit un dispositif qui fait passer un flux d'air entre la peau et l'organe de guidage, dans l'intention de réduire le frottement sur la surface supérieure de la peau mais elle aussi cette solution n'est pas optimale en sens qu'elle présente l'inconvénient de rendre non homogène la pellicule de produit chimique déposée par le cylindre gravé.In patent application No. VI97A000165, a device is described which makes pass an air flow between the skin and the guide member, with the intention of reducing the friction on the upper surface of the skin, but this solution is also not optimal in the sense that it has the disadvantage of making the film of non-homogeneous chemical deposited by the engraved cylinder.
Le but de la présente invention est de réaliser un dispositif à appliquer sur une machine tamponneuse à rouleaux à mouvement « inverse » qui garantisse un avancement régulier de la peau dans la zone resserrée de travail.The object of the present invention is to provide a device to be applied to a "reverse" roller bumper machine which guarantees regular advancement of the skin in the tightened working area.
Ceci est obtenu conformément aux caractéristiques de la partie caractérisante de
la revendication 1.This is achieved in accordance with the characteristics of the characterizing part of
Des formes de réalisation avantageuses font l'objet des sous-revendications.Advantageous embodiments are the subject of the subclaims.
On prévoit immédiatement en amont de la zone resserrée, et sur toute la largeur de cette zone, l'application d'un organe de guidage muni d'un profil convergent en direction de la zone resserrée, de manière que ledit organe canalise correctement la peau, même lorsqu'elle est d'une faible épaisseur, en éliminant en particulier l'éventualité du soulèvement de son bord antérieur avant qu'il n'entre en contact avec le rouleau gravé.It is planned immediately upstream of the constricted area, and over the entire width from this area, the application of a guide member provided with a converging profile in direction of the constricted area, so that said member correctly channels the skin, even when thin, by eliminating in particular the possibility of raising its anterior edge before it comes into contact with the engraved roller.
Le profil convergent de l'organe de guidage présente une surface inférieure qui vient se mettre en contact avec la peau sans exercer aucun type de pression sur la peau elle-même, alors que ladite surface va en outre délimiter le canal d'introduction de la peau dans la zone resserrée et est munie de moyens de réduction de l'aire de contact entre cette surface et cette peau, tels des entailles disposées avec leur axe parallèle à la direction d'avancement de la peau ou avec leur axe divergent par rapport à cette direction, disposées symétriquement par rapport à la médiane de l'organe de guidage lui-même. The converging profile of the guide member has a lower surface which comes into contact with the skin without exerting any type of pressure on the skin itself, while said surface will further delimit the introduction channel of the skin in the constricted area and is provided with means for reducing the contact area between this surface and this skin, like notches arranged with their axis parallel to the direction of advancement of the skin or with their axis diverging with respect to this steering, arranged symmetrically with respect to the median of the guide member himself.
De cette façon, en réduisant cette aire de contact, on réduit aussi le frottement qui se manifeste inévitablement avec le mouvement d'avancement de la peau elle-même, c'est-à-dire qui représente la cause déterminante du soulèvement du bord antérieur avant le contact avec le cylindre gravé.In this way, by reducing this contact area, we also reduce friction which inevitably manifests with the advancing movement of the skin itself, that is to say which represents the determining cause of the lifting of the edge anterior before contact with the engraved cylinder.
On prévoit également que ledit organe de guidage est monté sur des supports coulissants de manière que, dans le cas où la partie antérieure de la peau se soulève et, étant entraínée par le cylindre gravé, elle se retourne contre l'organe de guidage, que ledit organe de guidage, grâce à son support coulissant, soit repoussé, et que ce mouvement anormal vienne exciter un micro interrupteur qui arrête immédiatement le fonctionnement de la machine et éloigne cet organe définitivement de la zone resserrée, en favorisant ainsi l'extraction de la peau.It is also expected that said guide member is mounted on supports sliding so that, in case the anterior part of the skin lifts and, being driven by the engraved cylinder, it turns against the guide member, that said guide member, thanks to its sliding support, is pushed back, and that abnormal movement comes to excite a micro switch which immediately stops the operation of the machine and removes this body definitively from the constricted area, thus promoting the extraction of the skin.
Ces caractéristiques de l'invention ainsi que d'autres seront mieux mises en évidence dans la suite au moyen de la description d'une forme possible de réalisation, donnée uniquement à titre d'exemple illustratif et non limitatif, avec l'aide des dessins annexés sur lesquels :
- la Fig. 1 (planche I) représente une vue schématique en élévation de la machine pour la finition des peaux munie du dispositif selon l'invention ;
- la Fig. 2 (planche II) représente une vue de détail de la zone resserrée de travail, indiquée sur la Fig. 1 ;
- la Fig. 3 (planche III) représente une vue de la surface inférieure du profil convergent, selon la flèche « X » de la Fig. 2 ;
- les Fig. 4-5 représentent deux sections possibles du profil convergent, en coupe selon la ligne IV-IV de la Fig. 2 ;
- la Fig. 6 (planche IV) représente une vue en élévation du dispositif de support de l'organe de guidage ;
- la Fig. 7 représente la vue en plan du dispositif de la Fig. 6.
- Fig. 1 (plate I) represents a schematic elevation view of the machine for finishing the skins provided with the device according to the invention;
- Fig. 2 (plate II) represents a detailed view of the constricted working area, indicated in FIG. 1;
- Fig. 3 (plate III) represents a view of the lower surface of the converging profile, according to arrow "X" in FIG. 2;
- Figs. 4-5 represent two possible sections of the converging profile, in section along line IV-IV of FIG. 2;
- Fig. 6 (plate IV) represents an elevation view of the device for supporting the guide member;
- Fig. 7 shows the plan view of the device of FIG. 6.
Comme on peut le voir sur la Fig. 1, les peaux 1 sont introduites dans la zone
resserrée 2 de travail, définie par le rouleau gravé 3 et par le tapis transporteur 4 placé
au-dessous du rouleau, par l'intermédiaire de dispositifs connus en soi tels qu'une paire
de tapis opposés 5 et 6 qui délimitent un canal d'amenée 7.As can be seen in Fig. 1, the
Le rouleau gravé 3, muni de la lame de racle 8, qui contient le produit chimique
liquide de finition 9, tourne dans le mode « inverse », selon la flèche 10, c'est-à-dire
dans le sens opposé à la direction d'avancement des peaux (flèche 11) et à la direction
d'avancement (flèche 12) de la bande transporteuse 4.The engraved
Pour garantir une parfaite entrée du bord avant 13 de la peau 1 et un avancement
régulier de cette peau dans la zone resserrée 2, on a prévu l'emploi d'un organe de
guidage 14, placé immédiatement en amont de ladite zone resserrée, lequel organe,
muni d'un profil, ou extrémité, convergent 15, pénètre le plus possible dans cette zone
et s'étend sur toute la largeur, ou dimension transversale, de celle-ci.To guarantee perfect entry of the
Comme on peut le voir sur la Fig. 2, la surface inférieure 16 du profil convergent
15 va se placer à proximité de la portion de peau 17 placée immédiatement en amont de
la zone resserrée.As can be seen in Fig. 2, the
Dans un mode avantageux, sur ladite surface 16, sont formées des entailles ou
gorges 18 qui réduisent l'aire de contact entre ladite surface et la peau 17, comme on
peut le voir sur la Fig. 3.In an advantageous embodiment, on said
Le profil des entailles 18 peut prendre différentes conformations, selon le type
de peaux à traiter, en présentant leurs crêtes d'une forme qui va de la forme arrondie 19
à une forme plane 20.The profile of the
Finalement, comme on peut le voir sur les Fig. 6 et 7, l'organe de guidage 14 est
monté coulissant, au moyen des étriers 21, sur les barres 22 de telle manière que,
lorsque la peau 1, entraínée par le rouleau gravé 3, se soulève et se retourne (voir détail
de la Fig. 6), ledit organe soit repoussé, en allant solliciter le micro interrupteur 23 qui
arrête le fonctionnement de la machine.Finally, as can be seen in Figs. 6 and 7, the
Claims (6)
- Machine for finishing of skins and the like, comprising a converging/diverging narrowed area (2) for introduction of skins (1), defined by an engraved roller (3) and by a lower conveyor belt (4), means for conveying skins towards the said narrowed area, in particular an opposite pair of belts (5, 6) which delimit a conveying channel (7), the said engraved cylinder (3) being provided with a scraper (8) which contains a finishing liquid (9) and rotates in a direction opposite the direction of advance of the skin (1) and of the conveyor belt (4), a guide unit (14) which is placed immediately upstream from the narrowed area (2) and is provided with an end (15) which converges in the direction of the said area and penetrates into the said area whilst extending along the entire transverse dimension of the latter, a first surface (16) of the said converging end (15) being placed, in service, in the vicinity of the portion of skin (17) which is placed immediately upstream from the narrowed area, the said machine being characterised in that the said first surface comes into contact with the skin, without exerting pressure on the skin itself, the said first surface (16) having means (18) for reduction of the area of contact between the said skin and the said surface, and in particular notches.
- Machine according to claim 1, characterised in that the means (18) for reduction of the area of contact extend in a direction which is parallel to the direction of advance of the skin.
- Machine according to claim 1, characterised in that the means (18) for reduction of the area of contact extend in a manner which is divergent relative to the direction of advance of the skin, and are placed symmetrically relative to the centre of the guide unit (14).
- Machine according to claim 1, characterised in that the means (18) for reduction of the area of contact have a profile with rounded ridges.
- Machine according to claim 1, characterised in that the means (18) for reduction of the area of contact have a profile with flat ridges.
- Machine according to one or more of the preceding claims, characterised in that the guide unit (14) is fitted on sliding supports (21, 22) such that, in the case when the front part (13) of the skin is raised, it is entrained by the engraved cylinder and is returned against the guide unit (14) which can be displaced, and in that a micro-switch is provided which can detect the said displacement of the guide unit, such as to stop the functioning of the machine.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT1998VI000206A IT1302445B1 (en) | 1998-10-30 | 1998-10-30 | MACHINE FOR THE FINISHING OF LEATHER AND SIMILAR. |
| ITVI980206 | 1998-10-30 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0997538A2 EP0997538A2 (en) | 2000-05-03 |
| EP0997538A3 EP0997538A3 (en) | 2001-05-02 |
| EP0997538B1 true EP0997538B1 (en) | 2004-07-21 |
Family
ID=11426832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99121275A Expired - Lifetime EP0997538B1 (en) | 1998-10-30 | 1999-10-25 | Machine for finishing hides and the like |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0997538B1 (en) |
| AT (1) | ATE271616T1 (en) |
| DE (1) | DE69918772T2 (en) |
| ES (1) | ES2224526T3 (en) |
| IT (1) | IT1302445B1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1392599B1 (en) * | 2008-10-09 | 2012-03-09 | Ge Ma Ta Spa | LEATHER ROLLER FINISHING MACHINE, FINAL LEATHER, FABRIC, SYNTHETIC AND SIMILAR MATERIAL |
| FR2960554B1 (en) * | 2010-05-26 | 2012-07-06 | Ctc | DEVICE FOR INTRODUCING ANIMAL SKIN FOR REFINER MACHINE |
| IT201700007062A1 (en) * | 2017-01-24 | 2018-07-24 | Rotomec S R L | SKIN TREATMENT MACHINE AND SKIN TREATMENT METHOD |
| CN109321689A (en) * | 2018-09-30 | 2019-02-12 | 广州伊丝卡鞋业设计有限公司 | A kind of rack of skiving machine |
| IT201900025099A1 (en) * | 2019-12-20 | 2021-06-20 | Rotacoat S R L | ROLLER FINISHING MACHINE FOR LEATHER |
| IT202000003311A1 (en) | 2020-02-18 | 2021-08-18 | Ge Ma Ta Spa | Leather finishing machine |
| IT202000017926A1 (en) | 2020-07-23 | 2022-01-23 | Ge Ma Ta Spa | MACHINE FOR THE ROLLER FINISHING OF LEATHER |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB777045A (en) * | 1953-11-04 | 1957-06-19 | Ellen Louise Blatz Jenkins | Leather working machine |
| IT1243161B (en) * | 1990-11-09 | 1994-05-24 | Cartigliano Off Spa | ROLLER MOLDING MACHINE FOR SURFACE IMPREGNATION OF LEATHER AND SIMILAR PRODUCTS |
-
1998
- 1998-10-30 IT IT1998VI000206A patent/IT1302445B1/en active IP Right Grant
-
1999
- 1999-10-25 EP EP99121275A patent/EP0997538B1/en not_active Expired - Lifetime
- 1999-10-25 ES ES99121275T patent/ES2224526T3/en not_active Expired - Lifetime
- 1999-10-25 DE DE69918772T patent/DE69918772T2/en not_active Expired - Lifetime
- 1999-10-25 AT AT99121275T patent/ATE271616T1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE69918772T2 (en) | 2005-08-11 |
| EP0997538A2 (en) | 2000-05-03 |
| ES2224526T3 (en) | 2005-03-01 |
| ATE271616T1 (en) | 2004-08-15 |
| EP0997538A3 (en) | 2001-05-02 |
| ITVI980206A1 (en) | 2000-04-30 |
| IT1302445B1 (en) | 2000-09-05 |
| DE69918772D1 (en) | 2004-08-26 |
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