EP0182724B1 - Web-unwinding device with a splicer - Google Patents

Web-unwinding device with a splicer Download PDF

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Publication number
EP0182724B1
EP0182724B1 EP19850420190 EP85420190A EP0182724B1 EP 0182724 B1 EP0182724 B1 EP 0182724B1 EP 19850420190 EP19850420190 EP 19850420190 EP 85420190 A EP85420190 A EP 85420190A EP 0182724 B1 EP0182724 B1 EP 0182724B1
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EP
European Patent Office
Prior art keywords
web
rollers
adhesive tape
cutting
length
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
Application number
EP19850420190
Other languages
German (de)
French (fr)
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EP0182724A1 (en
Inventor
André Alaimo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Monomatic SA
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0182724A1 publication Critical patent/EP0182724A1/en
Application granted granted Critical
Publication of EP0182724B1 publication Critical patent/EP0182724B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/18—Attaching, e.g. pasting, the replacement web to the expiring web
    • B65H19/1857—Support arrangement of web rolls
    • B65H19/1873—Support arrangement of web rolls with two stationary roll supports carrying alternately the replacement and the expiring roll
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/18—Attaching, e.g. pasting, the replacement web to the expiring web
    • B65H19/1842—Attaching, e.g. pasting, the replacement web to the expiring web standing splicing, i.e. the expiring web being stationary during splicing contact
    • B65H19/1852—Attaching, e.g. pasting, the replacement web to the expiring web standing splicing, i.e. the expiring web being stationary during splicing contact taking place at a distance from the replacement roll
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/46—Splicing
    • B65H2301/464—Splicing effecting splice
    • B65H2301/4641—Splicing effecting splice by pivoting element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/46—Splicing
    • B65H2301/464—Splicing effecting splice
    • B65H2301/46412—Splicing effecting splice by element moving in a direction perpendicular to the running direction of the web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/46—Splicing
    • B65H2301/464—Splicing effecting splice
    • B65H2301/46414—Splicing effecting splice by nipping rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2408/00—Specific machines
    • B65H2408/20—Specific machines for handling web(s)
    • B65H2408/22—Splicing machines
    • B65H2408/221—Splicing machines features of splicing unit
    • B65H2408/2211—Splicing machines features of splicing unit splicing unit located above several web rolls arranged parallel to each other

Definitions

  • the tape unwinders generally comprise two support pins each intended to receive a reel carrying a strip to be unwound; the next reel is prepared during the course of the first reel; the devices comprise tensioning means ensuring the reversible accumulation of a certain length of strip at the outlet of the device, so as to make the strip tension downstream relatively continuous and independent of the scrolling upstream, in order to mask the time of joining of the strip ends, time during which the scrolling is disturbed inside the device, in particular by the inertia of the new coil to be driven.
  • Patent FR-A-1 465 317 describes a device in which the bonding of the strips to one another is carried out "on the fly", without stopping the strips, and without cutting. The rollers are brought together when marks printed on the strip are detected during unrolling.
  • the invention makes it possible to bond the strips end to end, that is to say without overlap by overlapping, using a single-sided adhesive.
  • the invention makes it possible to bond tape to tape, in excess thickness, but without protruding tail: the strips are glued over the entire length of superposition which separates the two respective ends of the strips.
  • rollers 15 and 16 are idle rollers, preferably made of a slightly elastic such as rubber, and their axes are horizontal and substantially parallel to the support axes 1 and 2, carried by carriages sliding in slides.
  • the strips 5 and 6 are superimposed over a length "L" with the interposition of the adhesive tape 312.

Landscapes

  • Replacement Of Web Rolls (AREA)

Description

La présente invention concerne les dispositifs permettant de réaliser un défilement continu d'une bande de matière par solidarisation de plusieurs bandes les unes à la suite des autres. Les bandes se présentent enroulées sur des bobines, et la solidarisation intervient lorsqu'on arrive en fin de déroulement d'une bobine pour commencer le déroulement de la bobine suivante. L'invention s'applique en particulier aux bandes destinées à former des sachets pour emballage.The present invention relates to devices making it possible to produce a continuous movement of a strip of material by securing several strips one after the other. The strips are wound on reels, and the joining occurs when we arrive at the end of the unwinding of a reel to start the unwinding of the next reel. The invention applies in particular to bands intended to form sachets for packaging.

Dans les techniques connues d'emballage, les dérouleurs de bande comprennent généralement deux axes supports destinés à recevoir chacun une bobine portant une bande à dérouler; on prépare la bobine suivante pendant le déroulement de la première bobine; les dispositifs comprennent des moyens tendeurs assurant l'accumulation réversible d'une certaine longueur de bande en sortie du dispositif, de façon à rendre la tension de bande en aval relativement continue et indépendante du défilement en amont, afin de masquer le temps de solidarisation des extrémités de bande, temps pendant lequel le défilement est perturbé à l'intérieur de l'appareil, notamment par l'inertie de la nouvelle bobine à entraîner.In known packaging techniques, the tape unwinders generally comprise two support pins each intended to receive a reel carrying a strip to be unwound; the next reel is prepared during the course of the first reel; the devices comprise tensioning means ensuring the reversible accumulation of a certain length of strip at the outlet of the device, so as to make the strip tension downstream relatively continuous and independent of the scrolling upstream, in order to mask the time of joining of the strip ends, time during which the scrolling is disturbed inside the device, in particular by the inertia of the new coil to be driven.

Les dispositifs connus assurent généralement la solidarisation des bandes par collage entre des rouleaux presseurs, mais le résultat obtenu est médiocre car le repérage de position des extrémités des deux bandes successives est très délicat.The known devices generally ensure the joining of the strips by bonding between pressure rollers, but the result obtained is poor because the location of the ends of the two successive strips is very delicate.

Le brevet FR-A-1 465 317 décrit un dispositif dans lequel le collage des-bandes l'une sur l'autre est effectué «à la volée», sans arrêt des bandes, et sans coupe. Le rapprochement des rouleaux s'effectue lors de la détection de marques imprimées sur la bande en cours de déroulement.Patent FR-A-1 465 317 describes a device in which the bonding of the strips to one another is carried out "on the fly", without stopping the strips, and without cutting. The rollers are brought together when marks printed on the strip are detected during unrolling.

Ainsi, il s'agit d'un dispositif qui n'est pas conçu pour réaliser particulièrement le collage bout à bout des bandes sans dépassement, mais plutôt pour réaliser un collage conservant l'équidistance des marques imprimées sur les bandes successives. Par le fait que le collage s'effectue «à la volée», la position respective des bandes dépend de la vitesse de défilement de la bande en fin de déroulement, vitesse qui est elle-même variable dans les conditions normales d'utilisation. Le dispositif n'est ainsi pas capable d'assurer un collage bout à bout dans des conditions de stabilité suffisante, ni de façon générale un collage dans lequel le distance entre les deux extrémités de bande soit connue et constante.Thus, it is a device which is not designed to particularly perform the end-to-end bonding of the strips without overshoot, but rather to produce a bonding retaining the equidistance of the marks printed on the successive strips. By the fact that the bonding is carried out "on the fly", the respective position of the strips depends on the speed of travel of the strip at the end of the unwinding, speed which is itself variable under normal conditions of use. The device is thus not capable of ensuring an end-to-end bonding under conditions of sufficient stability, nor generally a bonding in which the distance between the two ends of the strip is known and constant.

Dans la demande de brevet FR-A-2 531 940, des moyens de blocage assurent en outre le blocage des bandes pendant leur coupe par des moyens tranchants disposés à une distance prédéterminée de la zone de contact des rouleaux; des moyens d'aspiration pneumatique permettent de maintenir en attente le début de seconde bande dans la zone de contact des rouleaux. Dans ce dispositif, le collage s'effectue bande sur bande, en surépaisseur, et l'extrémité de la bande qui se termine est coupée après collage et forme une queue libre qui dépasse.In patent application FR-A-2 531 940, blocking means further ensure the blocking of the strips during their cutting by cutting means arranged at a predetermined distance from the contact zone of the rollers; pneumatic suction means keep the start of the second strip in standby in the contact area of the rollers. In this device, the bonding takes place strip on strip, in excess thickness, and the end of the strip which ends is cut after bonding and forms a free tail which protrudes.

La présente invention a notamment pour objet d'éviter les inconvénients des dérouleurs connus en proposant une nouvelle structure par laquelle le positionnement des extrémités respectives des bandes l'une par rapport à l'autre au collage s'effectue de façon constante et indépendante de la vitesse de défilement de la bande en sortie du dispositif.The object of the present invention is in particular to avoid the drawbacks of known unwinders by proposing a new structure by which the positioning of the respective ends of the strips relative to one another when bonding is carried out in a constant manner independent of the speed of travel of the tape at the output of the device.

Selon un premier mode de fonctionnement, l'invention permet de réaliser un collage des bandes en bout à bout, c'est à dire sans surépaisseur par chevauchement, au moyen d'un adhésif simple face.According to a first mode of operation, the invention makes it possible to bond the strips end to end, that is to say without overlap by overlapping, using a single-sided adhesive.

Selon un second mode de fonctionnement, l'invention permet de réaliser un collage bande sur bande, en surépaisseur, mais sans queue dépassante: les bandes sont collées sur la totalité de la longueur de superposition qui sépare les deux extrémités respectives des bandes.According to a second operating mode, the invention makes it possible to bond tape to tape, in excess thickness, but without protruding tail: the strips are glued over the entire length of superposition which separates the two respective ends of the strips.

Ces résultats sont obtenus avec des longueurs de zones de collage minimales, ce qui évite l'utilisation de surfaces adhésives longues. Un tel avantage est particulièrement important car, lorsque les bandes à solidariser sont larges, par exemple de plusieurs dizaines de centimètres, on évite ainsi l'apparition de plis ou de défauts d'alignement dans la zone de collage.These results are obtained with minimum lengths of bonding zones, which avoids the use of long adhesive surfaces. Such an advantage is particularly important because, when the strips to be joined are wide, for example several tens of centimeters, this avoids the appearance of folds or misalignments in the bonding zone.

Pour atteindre ces objets ainsi que d'autres, le dispositif selon la présente invention comprend, comme dans la demande de brevet FR-A-2 531 940, deux rouleaux presseurs fous en matière légèrement élastique et d'axes parallèles entre lesquels passent les bandes; les axes des rouleaux sont mobiles dans le sens de leur rapprochement et de leur éloignement entre une position de contact et une position éloignée, les axes étant sollicités dans leurs mouvements par des vérins de rouleaux; il comprend des moyens tranchants et des moyens de blocage assurant le blocage des bandes pendant leur coupe dans une zone de coupe; des moyens d'aspiration d'un premier rouleau maintiennent en attente la première extrémité du ruban adhésif dans la zone de contact. Selon une caractéristique de l'invention, la seconde extrémité de la surface libre du ruban est alors sensiblement dans le plan de coupe des moyens tranchants. Pour cela, le dérouleur comprend un dispositif de préparation de début de bande muni de repères pour découper et coller un ruban adhésif sur la seconde bande de manière que le ruban présente face à la première bande une surface adhésive libre dont la longueur est égale à la distance entre les moyens tranchants et la zone de contact des rouleaux presseurs.To achieve these and other objects, the device according to the present invention comprises, as in patent application FR-A-2 531 940, two crazy pressure rollers in slightly elastic material and with parallel axes between which the strips pass. ; the axes of the rollers are movable in the direction of their approach and their distance between a contact position and a distant position, the axes being stressed in their movements by roller jacks; it comprises cutting means and blocking means ensuring the blocking of the strips during their cutting in a cutting zone; suction means of a first roller hold the first end of the adhesive tape in standby in the contact zone. According to a characteristic of the invention, the second end of the free surface of the ribbon is then substantially in the cutting plane of the cutting means. For this, the unwinder comprises a device for preparing the start of the tape provided with marks for cutting and sticking an adhesive tape on the second tape so that the tape has a free adhesive surface opposite the first tape whose length is equal to the distance between the cutting means and the contact area of the pressure rollers.

Selon une première possibilité assurant une solidarisation des bandes bout à bout, le dispositif de préparation comprend des moyens pour adapter un ruban adhésif simple face en bout de la seconde bande, la face adhésive étant tournée vers la première bande, et le ruban adhésif prolongeant l'extrémité de la seconde bande sur une longueur égale à la distance entre la zone de contact des rouleaux et la zone de coupe, de sorte que, après rapprochement des rouleaux et coupe de la fin de première bande, les bandes sont assemblées bout à bout en étant reliées par le ruban adhésif.According to a first possibility ensuring a joining of the strips end to end, the preparation device comprises means for adapting a single-sided adhesive tape to the end of the second strip, the adhesive side being turned towards the first strip, and the adhesive tape extending the end of the second strip over a length equal to the distance between the contact zone of the rollers and the cutting zone, so that, after bringing the rollers together and cutting from the end of the first strip, the strips are assembled end to end while being connected by adhesive tape.

Selon une seconde possibilité, assurant une solidarisation des bandes par superposition mais sans queue dépassante, le dispositif de préparation comprend des moyens pour coller un ruban adhésif double face, non dépassant, en bout de la seconde bande sur une longueur égale à la distance entre la zone de contact des rouleaux et la zone de coupe, de sorte que, après rapprochement des rouleaux et coupe de la fin de première bande, les bandes sont superposées selon une longueur choisie avec interposition du ruban adhésif.According to a second possibility, ensuring a joining of the strips by superposition but without protruding tail, the preparation device comprises means for sticking a double-sided adhesive tape, not protruding, at the end of the second strip over a length equal to the distance between the contact zone of the rollers and the cutting zone, so that, after the rollers have been brought together and the end of the first strip has been cut, the strips are superimposed according to a chosen length with interposition of adhesive tape.

Selon une autre caractéristique de l'invention, le dispositif comprend un détecteur de fin de première bande, dont le signal commande l'actionnement des moyens de blocage de première bande et le rapprochement des rouleaux presseurs, puis la coupe de la première band lorsque les rouleaux sont en contact, et enfin l'écartement du rouleau en fin de passage de ruban adhésif.According to another characteristic of the invention, the device comprises a detector for the end of the first strip, the signal of which controls the actuation of the means for blocking the first strip and the bringing together of the pressure rollers, then the cutting of the first strip when the rollers are in contact, and finally the spacing of the roller at the end of the passage of adhesive tape.

D'autres objets, caractéristques et avantages de la présente invention, ressortiront de la description suivante d'un mode de réalisation particulier, faite en relation avec les figures jointes, parmi lesquelles:

  • - la figure 1 représente une vue d'ensemble de face du dispositif de la présente invention;
  • - les figures 2 à 12 illustrent les différentes étapes de fonctionnement du dispositif.
Other objects, characteristics and advantages of the present invention will emerge from the following description of a particular embodiment, made in relation to the attached figures, among which:
  • - Figure 1 shows an overall front view of the device of the present invention;
  • - Figures 2 to 12 illustrate the different stages of operation of the device.

Comme le représentent les figures, le dispositif comprend deux axes supports horizontaux 1 et 2 destinés à recevoir chacun une bobine, respectivement 3 et 4 portant une bande à dérouler. Le dispositif est représenté sur les figures dans un état où la bobine 3 supporte une première bande 5 bientôt en fin de déroulement, et la bobine 4 supporte une seconde bande 6 qui devra prendre sa suite. Les bobines 3 et 4 tournent librement sur leurs axes, l'entraînement des bandes étant assuré an aval du dispositif.As shown in the figures, the device comprises two horizontal support axes 1 and 2 each intended to receive a coil, respectively 3 and 4 carrying a strip to be unwound. The device is shown in the figures in a state where the reel 3 supports a first strip 5 soon at the end of the unwinding, and the reel 4 supports a second strip 6 which will have to take over. The coils 3 and 4 rotate freely on their axes, the bands being driven downstream of the device.

La sortie de bande hors du dispositif s'effectue par le haut, selon une ouverture 7. Au voisinage de l'ouverture 7 est placé un dispositif tampon 8, dont la fonction est d'assurer l'accumulation réversible d'une certaine longueur de bande.The tape exit from the device is effected from above, through an opening 7. In the vicinity of the opening 7 is placed a buffer device 8, the function of which is to ensure the reversible accumulation of a certain length of bandaged.

Dans le mode de réalisation représenté sur les figures, la bande 5 passe autour d'une succession de rouleaux, un premier rouleau fixe 9 et un second rouleau fixe 10, puis un rouleau mobile 11 monté sur un chariot 12, et enfin un rouleau fixe 13 disposé au voisinage du rouleau fixe 10. Le chariot 12 est mobile en translation sur des guides 14 du dispositif tampon 8, et peut se rapprocher et s'éloigner des rouleaux 10 et 13. Il est sollicité par des moyens élastiques, non représentés sur la figure, tendant à l'éloigner des rouleaux fixes 10 et 13. On comprendra aisément que le dispositif tampon 8 permet que le défilement de bande 5 en aval, c'est-à-dire à la sortie du dispositif, soit continu et indépendant du défilement en amont, c'est-à-dire dans le dispositif. On peut ainsi arrêter momentanément le défilement des bandes à l'intérieur du dispositif pour assurer leur solidarisation l'une à l'autre, sans perturber le défilement de bande à l'extérieur.In the embodiment shown in the figures, the strip 5 passes around a succession of rollers, a first fixed roller 9 and a second fixed roller 10, then a movable roller 11 mounted on a carriage 12, and finally a fixed roller 13 disposed in the vicinity of the fixed roller 10. The carriage 12 is movable in translation on guides 14 of the buffer device 8, and can approach and move away from the rollers 10 and 13. It is stressed by elastic means, not shown on the figure, tending to move it away from the fixed rollers 10 and 13. It will easily be understood that the buffer device 8 allows the strip running 5 downstream, that is to say at the outlet of the device, to be continuous and independent scrolling upstream, that is to say in the device. It is thus possible to temporarily stop the running of the strips inside the device to ensure that they join together, without disturbing the running of the strip outside.

Entre les bobines 3 et 4 et le dispositif tampon 8, les bandes 5 et 6 passent sur divers rouleaux de guidage, et en particulier entre deux rouleaux 15 et 16. Les rouleaux 15 et 16 sont des rouleaux fous, de préférence en une matière légèrement élastique telle qu'un caoutchouc, et leurs axes sont horizontaux et sensiblement parallèles aux axes supports 1 et 2, portés par des chariots coulissant dans des glissières.Between the coils 3 and 4 and the buffer device 8, the strips 5 and 6 pass over various guide rollers, and in particular between two rollers 15 and 16. The rollers 15 and 16 are idle rollers, preferably made of a slightly elastic such as rubber, and their axes are horizontal and substantially parallel to the support axes 1 and 2, carried by carriages sliding in slides.

Les axes des rouleaux 15 et 16 sont mobiles dans le sens de leur rapprochement et de leur éloignement. Chacun des rouleaux est mobile, indépendamment de l'autre, entre une position de retrait dans laquelle il est écarté du plan médian II-II du dispositif, et entre une position rapprochée dans laquelle il est tangent au plan médian II-II avec éventuellement un léger dépassement. Ainsi, les rouleaux peuvent admettre une position de contact dans laquelle ils se touchent selon leurs zones ou génératrices de contact respectives 17 et 18 dans le plan médian II-II. Dans leurs mouvements de translations, les axes des rouleaux sont sollicités par des vérins de rouleaux, respectivement 19 et 20, développant leur action entre deux butées de fin de course.The axes of the rollers 15 and 16 are movable in the direction of their approach and their distance. Each of the rollers is movable, independently of the other, between a withdrawal position in which it is spaced from the median plane II-II of the device, and between a close-up position in which it is tangent to the median plane II-II with possibly a slight overshoot. Thus, the rollers can admit a contact position in which they touch according to their respective contact zones or generators 17 and 18 in the median plane II-II. In their translation movements, the axes of the rollers are stressed by roller jacks, respectively 19 and 20, developing their action between two end of travel stops.

Entre les rouleaux 15 et 16 et les bobines, respectivement 3 et 4, le dispositif comprend des moyens tranchants, respectivement 21 et 22, destinés à couper les bandes 5 et 6. Les moyens tranchants sont par exemple constitués de couteaux, venant porter contre une enclume 23, et sollicités par des vérins de couteau, respectivement 24 et 25.Between the rollers 15 and 16 and the coils, respectively 3 and 4, the device comprises cutting means, respectively 21 and 22, intended to cut the strips 5 and 6. The cutting means consist for example of knives, coming to bear against a anvil 23, and biased by knife cylinders, respectively 24 and 25.

Selon une disposition particulièrement importante, réduisant la longueur de zone de collage, le dispositif comprend deux rouleaux de déviation 40 et 41, diposés respectivement à proximité amont des rouleaux 15 et 16, d'axes parallèles aux axes des rouleaux 15 et 16, et disposés symétriquement selon un écartement choisi pour que les portions de bandes obliques, tendues respectivement entre les rouleaux 15 et 40 et les rouleaux 16 et 41 fassent un angle A inférieur à 90 degrés. L'angle A, par exemple de 20 ou 30 degrés, est tel que l'on peut insérer une enclume 23 unique entre les portions obliques de bandes, et l'on peut disposer les couteaux 21 et 22 entre les rouleaux 15 et 16 et les rouleaux de déviation 40 et 41. Ainsi, on place les couteaux 21 et 22 face à face dans un même plan de coupe 1-1 transversal, comme le représentent les figures.According to a particularly important arrangement, reducing the length of the bonding zone, the device comprises two deflection rollers 40 and 41, disposed respectively near the upstream of the rollers 15 and 16, with axes parallel to the axes of the rollers 15 and 16, and arranged symmetrically according to a spacing chosen so that the portions of oblique bands, stretched respectively between the rollers 15 and 40 and the rollers 16 and 41 make an angle A less than 90 degrees. The angle A, for example 20 or 30 degrees, is such that a single anvil 23 can be inserted between the oblique portions of strips, and the knives 21 and 22 can be placed between the rollers 15 and 16 and the deflection rollers 40 and 41. Thus, the knives 21 and 22 are placed face to face in the same transverse cutting plane 1-1, as shown in the figures.

Des pinces de blocage, respectivement 26 et 27, sont disposées à l'amont des moyens tranchants, c'est-à-dire entre les moyens tranchants et les bobines 3 et 4, pour assurer le blocage des bandes 5 et 6 pendant leur coupe. Ainsi, la bande se trouve tendue entre le dispositif tampon 8 et le moyen de blocage correspondant, de sorte que la coupe s'effectue selon une position précise et reproductible, et sans arrachement ou déchirement. La précision de coupe est importante dans le dispositif de la présente invention pour permettre un positionnement ultérieur précis des extrémités des bandes.Locking clamps, respectively 26 and 27, are arranged upstream of the cutting means, that is to say between the cutting means and the coils 3 and 4, to ensure the locking of the strips 5 and 6 during their cutting. . Thus, the strip is stretched between the buffer device 8 and the corresponding locking means, so that the cut is made in a precise and reproducible position, and without tearing or tearing. Cutting accuracy is important in the device of the present invention to allow precise subsequent positioning of the ends of the strips.

Les rouleaux 15 et 16 comportent des trous d'aspiration périphériques reliés à des moyens d'aspiration pneumatiques, de façon à maintenir à leurs surfaces extérieures tout élément tel qu'une band que l'on viendrait appliquer contre eux.The rollers 15 and 16 have peripheral suction holes connected to pneumatic suction means, so as to hold on their external surfaces any element such as a band which is applied against them.

Dans le mode de réalisation présenté sur la figure 1, le dispositif comprend des moyens pour détecter la fin de bande: par exemple, la bande 5 passe entre deux rouleaux 28 et 29 conducteurs de l'électricité, la bande 5 étant supposée isolante. En fin de bande, les deux rouleaux se rapprochent l'un de l'autre sous l'effet de moyens élastiques, et assurent un contact électrique fournissant le signal de fin de bande. Le signal de fin de bande est utilisé par la suite comme cela sera expliqué ci-après.In the embodiment presented in FIG. 1, the device comprises means for detecting the end of the strip: for example, the strip 5 passes between two rollers 28 and 29 conductors of electricity, the strip 5 being assumed to be insulating. At the end of the strip, the two rollers approach each other under the effect of elastic means, and provide an electrical contact providing the end of strip signal. The end-of-band signal is used later as will be explained below.

Le dispositif comprend en outre un dispositif de préparation de début de bande associé à chaque rouleau. On a représenté sur les figures 2 à 5 un dispositif 30 de préparation, associé au rouleau 16, dans un mode de réalisation permettant le collage des bandes bout à bout. Il comporte un support pivotant 31, susceptible de pivoter par action manuelle autour d'un axe 32. Le support 31 forme réceptacle pour supporter l'extrémité de la bande 6 et un ruban adhésif 33. Le support 31 est pivotant entre une position de préparation, représentée sur la figure 3, dans laquelle il est écarté des rouleaux pour rendre sa surface accessible, et une position d'application, représentée sur la figure 4, dans laquelle il plaque le ruban adhésif et la bande 6 contre le rouleau correspondant, par exemple le rouleau 16. Le support 31 comporte également des trous d'aspiration, reliés au dispositif pneumatique, pour maintenir l'extrémité de la bande. Un premier repère 34 et un second repère 35 sont ménagés sur le support 31, écartés l'un de l'autre d'une distance «L» égale à la distance «I» entre les couteaux 21 ou 22 et respectivement la zone de contact 17 ou 18 des rouleaux 15 ou 16.The device further comprises a device for preparing the start of the strip associated with each roll. FIGS. 2 to 5 show a preparation device 30, associated with the roller 16, in one embodiment allowing the strips to be bonded end to end. It comprises a pivoting support 31, capable of pivoting by manual action around an axis 32. The support 31 forms a receptacle for supporting the end of the strip 6 and an adhesive tape 33. The support 31 is pivotable between a preparation position , shown in Figure 3, in which it is spaced from the rollers to make its surface accessible, and an application position, shown in Figure 4, in which it presses the adhesive tape and the strip 6 against the corresponding roller, by example the roller 16. The support 31 also has suction holes, connected to the pneumatic device, to hold the end of the strip. A first mark 34 and a second mark 35 are provided on the support 31, spaced from each other by a distance "L" equal to the distance "I" between the knives 21 or 22 and respectively the contact zone 17 or 18 of the rollers 15 or 16.

Pour un collage bout à bout, le fonctionnement du dispositif est le suivant: comme le représente la figure 2, la bande 5 se déroule librement, le rouleau 15 est en position de retrait, le rouleau 16 est en position rapprochée. Pendant le déroulement de la bobine 3, on dispose la bobine 4 sur son axe, et l'on amène l'extrémité de la bande 6 sur le support 31 en position de préparation, jusqu'au premier repère 34. La bande est maintenue par l'aspiration des trous du support 31.For an end-to-end bonding, the operation of the device is as follows: as shown in FIG. 2, the strip 5 unwinds freely, the roll 15 is in the withdrawn position, the roll 16 is in the close position. During the unwinding of the reel 3, the reel 4 is placed on its axis, and the end of the strip 6 is brought on the support 31 in the preparation position, up to the first mark 34. The strip is held by the suction of the holes of the support 31.

Comme le représente la figure 3, on colle sur la partie de la bande 6 qui est posée sur le support 31 une longueur déterminée de ruban adhésif 33 simple face, le ruban 33 recouvrant une partie de la bande 6, et prolongeant cette bande selon la longueur «L» définie entre le premier repère 34 et le second repère 35 du support 31. Le ruban présente ainsi une surface adhésive libre 330 de longueur «L» pour recevoir la seconde bande.As shown in Figure 3, we stick to the part of the strip 6 which is placed on the support 31 a determined length of single-sided adhesive tape 33, the tape 33 covering part of the strip 6, and extending this strip according to the length “L” defined between the first mark 34 and the second mark 35 of the support 31. The tape thus has a free adhesive surface 330 of length “L” for receiving the second strip.

Selon la figure 4, on bascule le support mobile 31 en position d'application, amenant le ruban adhésif 33 contre le rouleau 16. Les moyens pneumatiques provoquent alors l'aspiration dans le rouleau 16, supprimant simultanément l'aspiration dans le support 31, et décollant la bande et le ruban adhésif du support 31.According to FIG. 4, the mobile support 31 is rocked in the application position, bringing the adhesive tape 33 against the roller 16. The pneumatic means then cause the suction in the roller 16, simultaneously eliminating the suction in the support 31, and peeling off the strip and the adhesive tape from the support 31.

Par rotation inverse de la bobine 4, dans le sens de la flèche 36, on amène l'extrémité du ruban adhésif 33 sur la zone de contact 18 du rouleau 16. Dans cette position, l'extrémité de la bande 6, ou seconde extrémité de la surface libre 330 adhésive, se trouve dans le plan de coupe 1-1.By reverse rotation of the reel 4, in the direction of the arrow 36, the end of the adhesive tape 33 is brought to the contact area 18 of the roll 16. In this position, the end of the strip 6, or second end of the adhesive free surface 330, is in the cutting plane 1-1.

Selon la figure 6, lorsqu'on détecte la fin de la bande 5, le signal de détection commande le blocage de la bande par le moyen de blocage ou pince 26, et provoque simultanément l'actionnement du vérin 19 pour amener le rouleau 15 en position rapprochée, en appui contre le rouleau 16. L'extrémité du ruban adhésif est alors appliquée contre une partie de la bande 5, par pincement entre les deux rouleaux. On actionne alors le couteau 21 qui coupe la bande 5. A partir de cet instant, le moyen de blocage 26 n'a plus d'effet, et la partie aval de la bande 5 entraîne les rouleaux 15 et 16 en rotation dans le sens des flèches représentées sur la figure 7. Le ruban adhésif 33 est également entraîné, entraînant la bande 6, et il se colle progressivement entre les rouleaux contre la fin de la bande 5. En fin de collage, comme le représente la figure 8, les bandes 5 et 6 sont reliées par le ruban adhésif 33 et se retrouvent bout à bout et pratiquement jointives. Le rouleau 16 est alors ramené en position de retrait.According to FIG. 6, when the end of the strip 5 is detected, the detection signal controls the blocking of the strip by the blocking means or clamp 26, and simultaneously causes the actuator 19 to actuate the roller 15 in close position, pressing against the roller 16. The end of the adhesive tape is then applied against part of the strip 5, by pinching between the two rollers. The knife 21 is then actuated, which cuts the strip 5. From this instant, the locking means 26 no longer have any effect, and the downstream part of the strip 5 drives the rollers 15 and 16 in rotation in the direction arrows shown in Figure 7. The adhesive tape 33 is also driven, driving the strip 6, and it gradually sticks between the rollers against the end of the strip 5. At the end of bonding, as shown in Figure 8, the bands 5 and 6 are connected by adhesive tape 33 and are found end to end and practically contiguous. The roller 16 is then returned to the withdrawal position.

Pour réaliser la jonction bout à bout, il est particulièrement important que la longueur «L» prévue sur le support mobile 31, c'est-à-dire la longueur selon laquelle le ruban adhésif prolonge la bande 6, soit égale à la longueur «I» de la bande 5 entre la zone de contact des rouleaux 15 et 16 et le plan de coupe 1-1.To make the butt joint, it is particularly important that the length "L" provided on the movable support 31, that is to say the length along which the adhesive tape extends the strip 6, is equal to the length " I "of the strip 5 between the contact zone of the rollers 15 and 16 and the cutting plane 1-1.

On remarquera que, sur le support 31, le ruban adhésif est collé par sa face adhésive. Pour faciliter son décollement ultérieur en position d'application, le support 31 comporte une surface extérieure concave 37 dans la zone occupée par le ruban adhésif 33, limitant la surface de contact avec le ruban.It will be noted that, on the support 31, the adhesive tape is glued by its adhesive face. To facilitate its subsequent detachment in the application position, the support 31 has a concave outer surface 37 in the area occupied by the adhesive tape 33, limiting the contact surface with the tape.

Selon un second mode de réalisation illustré par les figures 9 à 12, le dispositif assure un collage bande sur bande, en surépaisseur, mais sans queue. On utilise pour cela un dispositif 300 de préparation de début de bande, le dispositif comportant un support 310 formant réceptacle plan de longueur «L» égale à la distance «I» entre la zone de contact des rouleaux et la zone de coupe. Le support 310 comporte des trous d'aspiration reliés au dispositif pneumatique, pour maintenir momentanément l'extrémité de la bande.According to a second embodiment illustrated by FIGS. 9 to 12, the device provides tape-to-tape bonding, in excess thickness, but without tail. A device 300 for preparing the start of the strip is used for this, the device comprising a support 310 forming a flat receptacle of length "L" equal to the distance "I" between the contact zone of the rollers and the cutting zone. The support 310 has suction holes connected to the pneumatic device, to temporarily hold the end of the strip.

Pour un collage en surépaisseur sans queue, la préparation de la bande est la suivante: comme le représente la figure 9, on amène l'extrémité de la bande 6 sur le support 310, au moins jusqu'au premier bord 340. La bande est retenue par les trous d'aspiration. Comme le représente la figure 10, on colle au dessus un ruban adhésif double face 312, avec son extrémité 313 au niveau du second bord 350. On coupe le ruban et la bande le long du premier bord 340. Selon la figure 11, par rotation inverse de la bobine 4, on amène l'extrémité de la bande et du ruban adhésif dans la zone de contact 18 du rouleau 16. Dans cette position, l'autre extrémité du ruban adhésif 312 se trouve dans le plan de coupe 1-1.For an extra thickness bonding without a tail, the preparation of the strip is as follows: as shown in FIG. 9, the end of the strip 6 is brought to the support 310, at least up to the first edge 340. The strip is retained by the suction holes. As shown in Figure 10, we stick above a double-sided adhesive tape 312, with its end 313 at the second edge 350. We cut the tape and tape the along the first edge 340. According to FIG. 11, by reverse rotation of the reel 4, the end of the strip and of the adhesive tape are brought into the contact area 18 of the roller 16. In this position, the other end of the adhesive tape 312 is in section plane 1-1.

En fin de collage, comme le représente la figure 12, les bandes 5 et 6 sont superposées sur une longueur «L» avec interposition du ruban adhésif 312.At the end of bonding, as shown in FIG. 12, the strips 5 and 6 are superimposed over a length "L" with the interposition of the adhesive tape 312.

La présente invention n'est pas limitée aux modes de réalisation qui ont été explicitement décrits, mais elle en inclut les diverses variantes et généralisations contenues dans le domaine des revendications ci-après.The present invention is not limited to the embodiments which have been explicitly described, but it includes the various variants and generalizations thereof contained in the field of claims below.

Claims (9)

1. Continuous web unwinder comprising two support spindles (1, 2) each intended to receive a spool (3, 4) carrying a web (5, 6) to be unwound, means (8) for reversible accumulation of a specific length of web issuing from the device to render the running of the web on the downstream side continuous and independent of the running on the upstream side, and means for joining the end of a first web (5) to the start of the second web (6) by means of an adhesive tape, comprising: -two floating pressure rollers (15, 16) of a slightly resilient material and with mutually parallel spindles, between which pass the webs (5,6), the spindles of the rollers (15, 16) being movable relative to one another in the directions of approach and separation between a closely set position and a retracted position, at least one of the spindles being loaded by means of a roller ram (19, 20), the pressure rollers serving the purpose in their closely set position of ensuring the adhesion of the adhesive tape (33) on the first web (5) by compression of the webs (5, 6) and of the adhesive tape (33) between the pressure rollers (15, 16) in their contact area (18),
-cutting means (21, 22) of severing the end of the first web upstream of the rollers, at a predetermined distance (I) from the contact area (18) of the rollers,
- blocking means (26, 27) ensuring the stopping of the first web whilst it is cut,
- pneumatic suction means associated with a first pressure roller (16) for keeping the leading end of the adhesive tape (33) on standby in the contact area (18) of the first pressure roller,
- means for preparing the web start for glueing a length of adhesive tape (33) on the second web (6) on standby, characterised in that:
- the means for preparing the web start comprise a supporting device (30, 300) for preparation of the start of the web, provided with markings (34, 35, 340, 350) spaced apart from one another by a particular length L, on which the user may sever and glue an adhesive tape (33) on to the second web (6) in such a way that the prepared adhesive tape has an uncovered adhesive surface (330) of length L facing towards the first web (5),
- the length L is equal to the distance (I) between the cutting means (21, 22) and the contact area (18) of the rollers,
- in the standby position, whilst the first roller holds the first leading end of the adhesive tape (33) within its contact area (18), the second end of the free adhesive surface (330) is situated within the cutting area (I-I) of the cutting means.
2. Unwinder according to claim 1, characterised in that it comprises a device (28, 29) for detecting the end of the first web, the signal from which causes the actuation of the blocking means (26) of the first web and the mutual approach of the rollers (15, 16), then the severing of the first web (5) when the rollers are in contact, and finally the spreading apart of the rollers (15,16) at the end of the passage of the adhesive tape.
3. Unwinder according to one of claims 1 or 2, characterised in that the preparation device (30) comprises means for fitting a single-sided adhesive tape on the end of the second web (6), the adhesive surface being turned towards the first web (5), and the adhesive tape extending the end of the second web over a length (L) equal to the distance (I) between the contact area (18) of the rollers and the cutting area (I-I), so that after mutual approach of the rollers and severing of the end of the first web (5), the webs are joined end to end by being connected by the adhesive tape (33).
4. Unwinder according to claim 3, characterised in that the web start preparation device (30) comprises a pivoting support (31) intended to receive the adhesive tape (33) and the leading end of the second web, the support (31) comprising first markings (35) defining the required length of adhesive tape (33), and second markings (34) defining the relative position of the web end and of the tape, the support (31) being pivotable between a preparation position in which it is spaced apart from the rollers to render its surface accessible, and a position of application in which is presses the adhesive tape (33) against a pressure roller (16).
5. Unwinder according to one of claims 1 or 2, characterised in that the preparation device (300) comprises means for adhering a double-sided adhesive tape (312) which does not project beyond the end of the second web (6) over a length (L) equal to the distance (I) between the contact area (18) of the rollers and the cutting area (I-I) so that after mutual approach of the rollers and severing of the end of the first web (5), the webs are superposed with an overlap over a length (L), with interpositioning of the adhesive tape (312).
6. Unwinder according to claim 5, characterised in that the preparation device (300) comprises a support (310) forming a receiver of a length (L) equal to the distance (I) between the contact area (18) of the rollers and the cutting area, allowing the cutting of the web and of the tape along its leading edge (340), the support (310) comprising suction holes connected to the pneumatic device.
7. Unwinder according to any one of claims 1 to 6, characterised in that the blocking means are grippers (26, 27) placed between the cutting means and the spools (3, 4), ensuring the immobilisation of the webs at a precise and reproducible position.
8. Unwinder according to any one of claims 1 to 7, characterised in that it comprises two deflecting rollers (40, 41 ) respectively in upstream proximity to the pressure rollers (15, 16) and with a symmetrical spacing establishing two oblique web positions subtending an acute angle (A).
9. Unwinder according to claim 8, characterised in that the cutting means (21, 22) are mutually opposed blades made to bear against an anvil (23) situated within the angle (A) of the oblique web portions and are intended to cut the webs along a common cutting plane (I-I) close to the contact area (18) of the rollers.
EP19850420190 1984-10-25 1985-10-23 Web-unwinding device with a splicer Expired EP0182724B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8416962A FR2572373B1 (en) 1984-10-25 1984-10-25 DEVICE FOR CONDUCTING CONTINUOUS STRIPS BY ENSURING THEIR SOLIDARIZATION ONE BY ONE AFTER THE OTHERS
FR8416962 1984-10-25

Publications (2)

Publication Number Publication Date
EP0182724A1 EP0182724A1 (en) 1986-05-28
EP0182724B1 true EP0182724B1 (en) 1988-10-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850420190 Expired EP0182724B1 (en) 1984-10-25 1985-10-23 Web-unwinding device with a splicer

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EP (1) EP0182724B1 (en)
DE (1) DE3565387D1 (en)
FR (1) FR2572373B1 (en)

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IT1191362B (en) * 1986-06-23 1988-03-16 Az Cost Macchine Autom Acma Sp EQUIPMENT FOR JOINING THE INITIAL FLAP OF A NEW SPOOL TO THE TAPE OF A LOW REEL
JPS63162434A (en) * 1986-12-25 1988-07-06 株式会社　東京自働機械製作所 Exchanger for packaging material in packaging-material delivery device
DE3903792A1 (en) * 1989-02-09 1990-08-16 Tetra Pak Gmbh DEVICE FOR FLYING CHANGE FROM A FIRST DRUM TO A SECOND DRUM
DE3937286A1 (en) * 1989-11-09 1991-05-16 Hoechst Ag TAPE CHANGE DEVICE
NL1035313C2 (en) * 2008-04-18 2009-10-20 Pmb Uva Internat B V Film connection establishment, has depleted film role whose rear edge is connected to front of full film role, where depleted and full film rolls connected to normal transport direction of moving parts
CN103359514A (en) * 2013-07-11 2013-10-23 杭州中亚机械股份有限公司 Output mechanism for millimeter paper continuous supplying
CN104444503B (en) * 2013-09-17 2016-09-14 云南省玉溪市科技彩印有限公司 Multistation Rotary thermoprint anodized aluminium synchronizes change of lap and automatic label integral device
CN104192607B (en) * 2014-08-12 2017-01-25 杭州中亚机械股份有限公司 Membrane material alternative and continuous supply device
DE102019203746A1 (en) * 2019-02-07 2020-08-13 Bhs Corrugated Maschinen- Und Anlagenbau Gmbh Glue
CN111874698B (en) * 2020-07-16 2022-03-04 陕西思维印务有限公司 Paper receiving device of printing machine and rotary printing machine

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Also Published As

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DE3565387D1 (en) 1988-11-10
FR2572373A1 (en) 1986-05-02
FR2572373B1 (en) 1987-05-15
EP0182724A1 (en) 1986-05-28

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