EP0716996A2 - Method and device for preparing and opening of a reel - Google Patents

Method and device for preparing and opening of a reel Download PDF

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Publication number
EP0716996A2
EP0716996A2 EP95810754A EP95810754A EP0716996A2 EP 0716996 A2 EP0716996 A2 EP 0716996A2 EP 95810754 A EP95810754 A EP 95810754A EP 95810754 A EP95810754 A EP 95810754A EP 0716996 A2 EP0716996 A2 EP 0716996A2
Authority
EP
European Patent Office
Prior art keywords
coil
flat blade
turn
blade
turns
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.)
Granted
Application number
EP95810754A
Other languages
German (de)
French (fr)
Other versions
EP0716996A3 (en
EP0716996B1 (en
Inventor
Jean-Jacques Nauer
Jean Cestenaro
Pascal Christen
David Vuilleumier
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.)
Philip Morris Products SA
Original Assignee
Fabriques de Tabac Reunies SA
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
Priority claimed from EP94810716A external-priority patent/EP0721905B1/en
Application filed by Fabriques de Tabac Reunies SA filed Critical Fabriques de Tabac Reunies SA
Priority to EP95810754A priority Critical patent/EP0716996B1/en
Publication of EP0716996A2 publication Critical patent/EP0716996A2/en
Publication of EP0716996A3 publication Critical patent/EP0716996A3/en
Application granted granted Critical
Publication of EP0716996B1 publication Critical patent/EP0716996B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B65H19/105—Opening of web rolls; Removing damaged outer layers; Detecting the leading end of a closed web 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
    • B65H2301/41—Winding, unwinding
    • B65H2301/415—Unwinding
    • B65H2301/41505—Preparing unwinding process
    • B65H2301/41508—Preparing unwinding process the web roll being in the unwinding support / unwinding location
    • B65H2301/41509—Preparing unwinding process the web roll being in the unwinding support / unwinding location opening web roll and related steps
    • B65H2301/415095—Preparing unwinding process the web roll being in the unwinding support / unwinding location opening web roll and related steps gripping an edge of the web, e.g. by clamping and forward it, e.g. to splicing web advancing unit

Definitions

  • the present invention relates to a method and a device for preparing and opening a coil consisting of a strip of flexible material wound in superimposed turns and comprising an upper turn whose free end is fixed to the turn which is directly below it, said coil being disposed on a support axis and comprising two parallel sides.
  • the method and the device according to the invention apply particularly well to relatively narrow coils, that is to say delivering a strip having a maximum width of the order of a few centimeters.
  • the upper coil of the coil is covered with a protective strip, made of a material which may be different from that constituting the coil.
  • a protective strip made of a material which may be different from that constituting the coil.
  • upper turn of the coil is meant in the following description this possible protective strip as well as the first turn (s) of the coil.
  • the portion of the second turn on which the free end of the upper turn is glued must generally be eliminated; for this it must be possible to have auxiliary means allowing this elimination, which makes it possible to require cutting only one single turn, anywhere in the cell except in the immediate vicinity of the bonding point.
  • the closest prior art to be considered is disclosed in application DE-A-32.15.355.
  • the device described comprises a support bar on which are mounted a cutting blade and a coil separation blade, the separation of the turns as well as the cutting being controlled simultaneously by the movement of the support bar.
  • This device has many drawbacks: the construction provided does not allow the distance between the support bar and the separation blade to be adjusted, on the other hand it is quite difficult to minimize the height of the flange on which the separation blade is fixed, this causing an excessive number of turns to be cut; on the other hand, it suffices that the spring effect of the separation blade is reduced, for example after a long use, so that the clamping effect between the support bar and the separation blade is no longer guaranteed, thus it is possible to have one or more turns of the strip between the separation blade and the support bar which are not correctly sectioned; the support bar resting directly on the upper turns, these are compressed which does not facilitate the introduction of the separation blade; the simultaneous movements of the support bar in advance on the last turn, of the separation blade and of the cut
  • An object of the invention is therefore to propose a method for preparing and opening a coil, not encountering the drawbacks of the means of the prior art and making it possible to ensure that the coil located directly below the last cut turn is absolutely intact, even if the upper turns of the coil are wound fairly tightly.
  • Another object of the invention is to propose a device for preparing and opening a coil keeping intact the turn situated directly below the last cut turn and not meeting the drawbacks of the devices of the prior art, this even if the upper turns of the coil are wound fairly tightly.
  • Yet another object of the invention is to provide a device for preparing and opening a reel that can be associated with a machine supplying the paper tape necessary for a cigarette manufacturing machine, including for manufacturing or install filters.
  • the strip of flexible material is a strip of paper from which the wrapping sheets of the cigarette rod will be drawn.
  • Those skilled in the art will know how to adapt the method and the device described to other uses, in particular to the manufacture or installation of cigarette filters or to ribbons of other materials.
  • Figure 1 shows a front view of a machine 1 feeding a cigarette machine (not shown) with a strip of paper and allowing the connection of two strips of paper.
  • the paper supply means 2 comprise in particular a first axis 20 for unwinding a strip of paper 21 in use, which by a set of deflection rollers is directed towards the cigarette machine.
  • These means further include a second axis 22 for storing and preparing a reel 23 of full paper.
  • means for preparing and opening the reel 23 are activated, these means notably being constituted by a swinging arm 10 at the free end of which is arranged a device 3 for preparing and opening the coil 23, said device being described in detail below.
  • the swinging arm 10 can take two positions, a waiting position, shown in broken lines, and a working position, shown in solid lines, where the device 3 is in action.
  • the device 3 after having opened the coil 23, is capable of gripping the last cut turn 24; by actuating the oscillating arm 10 again, this turn 24, shown in broken lines, is driven by the device 3 which returns to the rest position.
  • a device gripping 11, known in the art and not part of the invention moves along a slide 12 to grip the cut coil 24 and take it so that on part of the path of the strip 21, this new strip, shown at 24A, follows a parallel path close to the strip 21.
  • a joining device shown diagrammatically at 13, which can for example be of the type described in patent EP-B-0.662.437, can then be actuated for joining the strip 24A with the strip 21.
  • the device referenced in 10 and 3 is part of the invention, the rest of the machine 1 has been described briefly above in order to be give an account of the context in which the device according to the invention can operate.
  • the characteristics of the paper feeding machine 1 mentioned here are only by way of example, the reel preparation and opening device being able to operate on other types of machines.
  • Figures 2, A, B, C and D show the preparation and cutting device 3 mentioned above seen from the side during four successive stages of the process, while Figures 3, A, B, C and D show part of the same device seen from the front while FIG. 3E shows it during a fifth step.
  • the device 3 is mounted at the end of the swing arm 10. It consists in particular of a first jack 30 whose body is fixed to the swing arm 10 and of which the rod 30A is connected to a first support 31 on one face of which the end of a flat blade 32 is fixed.
  • a first jack 30 whose body is fixed to the swing arm 10 and of which the rod 30A is connected to a first support 31 on one face of which the end of a flat blade 32 is fixed.
  • the device 3 further comprises a second cylinder 33, the body of which is also fixed to the swinging arm 10 and the rod 33A of which is connected to a second support 34 on which is fixed a cutting blade 35.
  • a second cylinder 33 the body of which is also fixed to the swinging arm 10 and the rod 33A of which is connected to a second support 34 on which is fixed a cutting blade 35.
  • the third support 36 also carries an L-shaped clamping support 38 and pivoting around with an axis perpendicular to L, the branch of the support 38 oriented towards the coil 23 carrying a clamping plate 38A while the branch 38B can be actuated by a lever 31A secured to the first support 31.
  • the flat blade 32 is thin but relatively wide; directly above this blade there is the clamping support 38 and the clamping plate 38A, as well as the cutting blade 35.
  • the support tongue 37 is slightly offset with respect to the flat blade 32, being arranged with the other side of the clamping plate 38A than the cutting blade 35.
  • the distance between the lower support face 37A of the support tongue 37 and the upper face of the flat blade 32 is a few tenths of a mm, depending on the thickness of the paper or material forming the strip and the number of turns to be gripped and cut.
  • Preferably known adjustment means can be used to adjust this distance in order to cut at least a single turn.
  • Means not shown may be provided for angularly positioning the coil 23 on its axis, so that the cutting of the upper turn 24 takes place at a location relatively distant from that where said upper turn is glued to the turn which follows it. , respectively not in a location in the immediate vicinity of this bonding point; it is thus possible to minimize the length of paper to be eliminated.
  • This angular positioning can be obtained either by the operator of the machine, or by an automatic means. Since the front tip of the flat blade 32 is intended to be inserted between two turns of the coil 23, this tip has a shape adapted to this function.
  • the operation of the device 3 can now be described.
  • the swinging arm 10 is actuated by a rotary actuator (not shown) to press the device 3 against the coil 23, in the embodiment described here the actuator 30 is actuated in order to advance the flat blade 32; the advance of the support 31 causes the clamping plate 38A to be lowered by the action of the lever 31A on the portion 38A of the support 38.
  • the clamping plate 38A comes into slight contact with the upper face of the flat blade 32 in order to prevent it from bending.
  • the swinging arm is actuated until the underside of the flat blade 32 comes into contact with a portion of the upper coil 24 of the coil 23; when this contact is established, the movement of movement of the oscillating arm 10 stops.
  • FIGS. 2A and 3A This first step of the method is shown in FIGS. 2A and 3A.
  • the cylinder 30 is actuated to remove the blade 32 back; the device 3, then no longer supported on the upper turn 24, then continues a very slight movement in the direction of the coil 23 until the lower support face 37A of the support tongue 37 comes to its tower in contact with the upper coil 24.
  • the clamping plate 38A rests freely on the coil 24, without pressure. Then, and as seen in Figures 2C and 3C, the flat blade 3? is advanced again; given the slight movement of the device 3 towards the coil 23 that we had in the previous step, the plane of the flat blade 32 is located just below one or more of the upper turns 24 of the coil 23. The flat blade 32 is therefore introduced, by the side of the coil, below this or these upper turns and thus crosses the entire thickness of the coil 23. In view of the advance of the flat blade 32, the clamping plate 38A is at pressed again against said blade, thus tightly tightening the turn or turns 24 taken between the upper face of the flat blade 32 and the lower face of the clamping plate 38A.
  • Figures 2D and 3D show the cutting operation, the cylinder 33 being actuated to drive the cutting blade 35 in order to cut the turn or turns 24 arranged above the flat blade 32.
  • the flat blade 32 may have a groove 32A disposed parallel to its longitudinal axis and corresponding to the trace made by the sharpened portion 35A of the cutting blade 35 on the flat blade 32.
  • This groove 32A allows guidance of the sharpened portion 35A , preventing it from deviating from its rectilinear path during the back-and-forth movement causing the cut. Since this flat blade acts as a protective screen, the turns of the coil 23 arranged directly below the flat blade 32 cannot be started by the sharpened portion 35A of the cutting blade 35.
  • the movement back and forth of the cutting blade 35 can be repeated one or more times.
  • the cutting blade 35 is withdrawn, the flat blade 32 remaining advanced, thereby enclosing the coil (s) 24 with the clamping plate 38A.
  • the oscillating arm 10 is again actuated in order to move the device 3 away from the coil 23, the latter then being rotated by the traction exerted on the upper turn or turns 24 or else by an auxiliary means not shown; the cut end of the strip is taken to be treated as explained above with reference to FIG. 1.
  • the cut segments of the turns greater than the last are eliminated by known means.
  • the cylinders 30 and 33 are preferably double-acting cylinders, pneumatic or hydraulic, although other means for actuating the flat blade 32 and the cutting blade 35 can be envisaged. It is further noted in FIG. 2A that the cutting blade 35 and fixed to the support 34 by screw means 35B allowing the blade 35 to be quickly changed when it is worn as well as to adjust its position relative to the flat blade 32.
  • An important point of the process is to arrive at exactly positioning the flat blade 32 so that it can then easily be slid under the upper turn 24 of the coil 23.
  • this positioning is carried out in two stages, approach of the device 3 when the flat blade 32 is advanced, then removal of this blade 32 to press the support tab 37 on the upper turn 24.
  • Other means can be provided to arrive at this stage of the process, if the space available on the device allows it, the support tongue 37 may have a sufficient width to be brought directly into contact with the upper turn 24 during the movement of the oscillating arm 10, the feeler means separated from the swing arm 10 or detectors may also be provided to determine the position in which the swing arm 10 should stop.
  • the coil 23 remains generally stationary, with no rotational movement around its axis.
  • the latter can be animated by a slow rotational movement, preferably in the opposite direction to that of its normal course, so that during this rotational movement the flat blade 32 tends to be pushed up by the spiral winding of the turns of the coil.
  • the device may further comprise a radial support device 39 having at its end close to the coil a roller 39A.
  • the support device 39 is independent of the device 3 and is placed upstream of the latter relative to the normal direction of unwinding of the coil 23.
  • the device d support 39 is pressed with a certain pressure, radially relative to the coil 23 by means of a pneumatic or hydraulic actuator not shown, the pressure being transmitted to the upper turns via the roller 39A.
  • the method and the device according to the invention which are easily adaptable on a cigarette manufacturing line, it is certain to obtain a clean cut of the upper turn of the full reel, without the turn which is attached to it. directly below is damaged.
  • the device described is relatively simple in design, requiring few means of control or activation, which makes it particularly reliable and inexpensive.

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  • Replacement Of Web Rolls (AREA)

Abstract

The procedure comprises steps of introducing a flat blade (32) between the two outer layers of paper, which are stuck together, and cutting the outer layer (24) to free its end. The flat blade (32) forms part of a mechanism (3) for preparing an opening reels, and is designed to advance automatically into a position where it penetrates between the two outer layers. Once the blade has been inserted the outer layer is cut with a following blade (35) performing a reciprocating motion and acting as a screen to protect the underlying layers. The free end of the upper layer of paper is gripped as it is cut, so that it is ready to be connected to another paper layer.

Description

La présente invention concerne un procédé ainsi qu'un dispositif de préparation et d'ouverture d'une bobine constituée d'une bande d'un matériau souple enroulée en spires superposées et comportant une spire supérieure dont l'extrémité libre est fixée sur la spire qui lui est directement inférieure, ladite bobine étant disposée sur un axe support et comportant deux flancs parallèles. Le procédé et le dispositif selon l'invention s'appliquent particulièrement bien à des bobines relativement étroites, c'est-à-dire délivrant une bande ayant une largeur maximum de l'ordre de quelques centimètres.The present invention relates to a method and a device for preparing and opening a coil consisting of a strip of flexible material wound in superimposed turns and comprising an upper turn whose free end is fixed to the turn which is directly below it, said coil being disposed on a support axis and comprising two parallel sides. The method and the device according to the invention apply particularly well to relatively narrow coils, that is to say delivering a strip having a maximum width of the order of a few centimeters.

De nombreux brevets décrivent différents procédés et dispositifs dans lesquels il est nécessaire d'ouvrir une bobine constituée notamment d'une bande de papier ou d'un autre matériau et destinée à alimenter une machine de fabrication, en particulier les brevets EP-B-0.318.427, EP-B-0.331.634 et EP-B-0.475.886. Ces brevets prévoient de manière générale qu'une lame coupante, disposée perpendiculairement au sens de déroulement de la bande de papier est appliquée sur la spire supérieure de la bobine afin de la couper. La lame coupante étant appuyée sur la spire supérieure avec une certaine force et/ou s'enfonçant dans la bobine d'une certaine distance, généralement plusieurs spires de la bande sont coupées simultanément, sans que ce nombre de spires puisse être contrôlé. Par ces systèmes, il arrive fréquemment que la spire située directement au-dessous de la dernière spire coupée soit entamée par la lame, créant ainsi un point faible amenant à une rupture ultérieure de la bande en ce point. Une telle rupture nécessite un arrêt de la machine d'où une perte de productivité. Dans certains cas, la spire supérieure de la bobine est recouverte d'une bande de protection, faite d'un matériau pouvant être différent de celui constituant la bobine. Par spire supérieure de la bobine, on entend dans la suite de la description cette éventuelle bande de protection ainsi que la ou les premières spires de la bobine. La portion de la deuxième spire sur laquelle est collée l'extrémité libre de la spire supérieure doit généralement être éliminée; pour ceci on doit pouvoir disposer de moyens auxiliaires permettant cette élimination, ce qui permet de ne nécessiter la coupure que d'une seule spire , en un endroit quelconque de cellle-ci sauf à proximité immédiate du point de collage.Numerous patents describe various processes and devices in which it is necessary to open a coil made up in particular of a strip of paper or of another material and intended to supply a manufacturing machine, in particular the patents EP-B-0.318 .427, EP-B-0.331.634 and EP-B-0.475.886. These patents generally provide that a cutting blade, arranged perpendicular to the direction of unwinding of the paper strip is applied to the upper turn of the spool in order to cut it. The cutting blade being pressed on the upper turn with a certain force and / or sinking into the coil from a certain distance, generally several turns of the strip are cut simultaneously, without this number of turns being able to be controlled. By these systems, it frequently happens that the turn situated directly below the last cut turn is started by the blade, thus creating a weak point leading to a subsequent rupture of the strip at this point. Such a break requires stopping the machine, resulting in a loss of productivity. In some cases, the upper coil of the coil is covered with a protective strip, made of a material which may be different from that constituting the coil. By upper turn of the coil is meant in the following description this possible protective strip as well as the first turn (s) of the coil. The portion of the second turn on which the free end of the upper turn is glued must generally be eliminated; for this it must be possible to have auxiliary means allowing this elimination, which makes it possible to require cutting only one single turn, anywhere in the cell except in the immediate vicinity of the bonding point.

L'art antérieur le plus proche à considérer est divulgué par la demande DE-A-32.15.355. Le dispositif décrit comprend une barre support sur 5 laquelle sont montées une lame de coupe et une lame de séparation de spires, la séparation des spires de même que la coupe étant commandées simultanément par le mouvement de la barre support. Ce dispositif comprend de nombreux inconvénients: la construction prévue ne permet pas de régler la distance entre la barre support et la lame de séparation, d'autre part il est assez difficile de minimiser la hauteur du rehaut sur lequel est fixée la lame de séparation, ceci faisant qu'un nombre excessif de spires doit être coupé; d'autre part, Il suffit que l'effet de ressort de la lame de séparation soit diminué, par exemple après une longue utilisation, pour que l'effet de serrage entre la barre support et la lame de séparation ne soit plus garanti, ainsi il est possible d'avoir une ou plusieurs spires de la bande entre la lame de séparation et la barre support qui ne soient pas correctement sectionnées; la barre support s'appuyant directement sur les spires supérieures, celles-ci sont comprimées ce qui ne facilite pas l'introduction de la lame de séparation; la simultanéité des mouvements d'avance de la barre support en appui sur la dernière spire, de la lame de séparation et de la coupe entraîne un déplacement des spires à couper ainsi qu'un endommagement de la spire disposée directement sous la lame de séparation et ne permet pas une coupe franche des spires à couper; le dispositif décrit ne permet pas plusieurs passages du couteau et, vu la fixation de la lame de coupe sur la barre support, l'échange d'une lame de coupe usée est difficile. Ce dispositif ne comporte en outre aucun moyen permettant de relâcher la tension des spires supérieures de la bobine au cas où lesdites spires sont enroulées de manière serrée, ce qui rend impossible dans ce cas l'utilisation du dispositif décrit.The closest prior art to be considered is disclosed in application DE-A-32.15.355. The device described comprises a support bar on which are mounted a cutting blade and a coil separation blade, the separation of the turns as well as the cutting being controlled simultaneously by the movement of the support bar. This device has many drawbacks: the construction provided does not allow the distance between the support bar and the separation blade to be adjusted, on the other hand it is quite difficult to minimize the height of the flange on which the separation blade is fixed, this causing an excessive number of turns to be cut; on the other hand, it suffices that the spring effect of the separation blade is reduced, for example after a long use, so that the clamping effect between the support bar and the separation blade is no longer guaranteed, thus it is possible to have one or more turns of the strip between the separation blade and the support bar which are not correctly sectioned; the support bar resting directly on the upper turns, these are compressed which does not facilitate the introduction of the separation blade; the simultaneous movements of the support bar in advance on the last turn, of the separation blade and of the cut results in a displacement of the turns to be cut as well as damage to the turn arranged directly under the separation blade and does not allow a clean cut of the turns to be cut; the device described does not allow several passages of the knife and, given the attachment of the cutting blade to the support bar, the exchange of a worn cutting blade is difficult. This device does not furthermore comprise any means making it possible to release the tension of the upper turns of the coil in the case where said turns are tightly wound, which makes it impossible in this case to use the device described.

Les documents DE-A-39.18.552 et US-A-4.821.971 décrivent des dispositifs d'ouverture de bobines de grande largeur; les problèmes qui se posent dans ce cas sont essentiellement différents de ceux que propose de résoudre l'invention; en particulier ces dispositifs ne peuvent prévoir l'introduction d'une lame de séparation de spires sur toute la largeur de la bobine.The documents DE-A-39.18.552 and US-A-4,821,971 describe devices for opening very large coils; the problems which arise in this case are essentially different from those which the invention proposes to solve; in particular these devices cannot provide the introduction of a coil separation blade over the entire width of the coil.

Un but de l'invention est donc de proposer un procédé de préparation et d'ouverture d'une bobine, ne rencontrant pas les inconvénients des moyens de l'art antérieur et permettant d'assurer que la spire située directement au-dessous de la dernière spire coupée est absolument intacte, ceci même si les spires supérieures de la bobine sont enroulées de manière assez serrée.An object of the invention is therefore to propose a method for preparing and opening a coil, not encountering the drawbacks of the means of the prior art and making it possible to ensure that the coil located directly below the last cut turn is absolutely intact, even if the upper turns of the coil are wound fairly tightly.

Un autre but de l'invention est de proposer un dispositif de préparation et d'ouverture d'une bobine conservant intacte la spire située directement au-dessous de la dernière spire coupée et ne rencontrant pas les inconvénients des dispositifs de l'art antérieur, ceci même si les spires supérieures de la bobine sont enroulées de manière assez serrée.Another object of the invention is to propose a device for preparing and opening a coil keeping intact the turn situated directly below the last cut turn and not meeting the drawbacks of the devices of the prior art, this even if the upper turns of the coil are wound fairly tightly.

Encore un autre but de l'invention est de proposer un dispositif de préparation et d'ouverture d'une bobine pouvant être associé à une machine fournissant le ruban de papier nécessaire à une machine de fabrication de cigarettes, y compris pour la fabrication ou la pose des filtres.Yet another object of the invention is to provide a device for preparing and opening a reel that can be associated with a machine supplying the paper tape necessary for a cigarette manufacturing machine, including for manufacturing or install filters.

Ces buts sont atteints par un procédé répondant aux caractéristiques des revendications 1 à 10 ainsi que par un dispositif possédant les caractéristiques mentionnées aux revendications 11 à 22. Une utilisation particulière du dispositif selon l'invention est mentionnée à la revendication 23.These objects are achieved by a method corresponding to the characteristics of claims 1 to 10 as well as by a device having the characteristics mentioned in claims 11 to 22. A particular use of the device according to the invention is mentioned in claim 23.

L'invention est décrite ci-dessous en regard du dessin annexé comportant les figures où:

  • la figure 1 représente une vue partielle frontale d'une machine permettant de raccorder deux bandes de papier,
  • les figures 2A, 2B, 2C et 2D représentent des vues latérales du dispositif de préparation et de coupe selon diverses étapes du procédé,
  • les figures 3A, 3B, 3C, 3D et 3E représentent des vues de face des éléments principaux du dispositif précédent selon diverses étapes du procédé,
  • les figures 4A et 4B représentent deux vues d'un détail du dispositif précédent, et
  • la figure 5 représente un dispositif complémentaire au précédent.
The invention is described below with reference to the appended drawing comprising the figures where:
  • FIG. 1 represents a partial front view of a machine allowing two strips of paper to be connected,
  • FIGS. 2A, 2B, 2C and 2D show side views of the preparation and cutting device according to various stages of the process,
  • FIGS. 3A, 3B, 3C, 3D and 3E represent front views of the main elements of the previous device according to various stages of the process,
  • FIGS. 4A and 4B represent two views of a detail of the previous device, and
  • FIG. 5 represents a device complementary to the previous one.

La description qui suit correspond à une application particulière du procédé et du dispositif selon l'invention, à une ligne de fabrication de cigarettes. Dans ce cas, la bande de matériau souple est une bande de papier de laquelle seront tirées les feuilles d'emballage du boudin des cigarettes. L'homme du métier saura adapter le procédé et le dispositif décrit à d'autres utilisations, notamment à la fabrication ou à la pose de filtres de cigarettes ou à des rubans d'autres matériaux.The description which follows corresponds to a particular application of the method and of the device according to the invention, to a cigarette manufacturing line. In this case, the strip of flexible material is a strip of paper from which the wrapping sheets of the cigarette rod will be drawn. Those skilled in the art will know how to adapt the method and the device described to other uses, in particular to the manufacture or installation of cigarette filters or to ribbons of other materials.

La figure 1 montre une vue frontale d'une machine 1 alimentant une machine à cigarettes (non représentée) d'une bande de papier et permettant le raccordement de deux bandes de papier. Les moyens 2 d'alimentation en papier comprennent notamment un premier axe 20 de déroulement d'une bande de papier 21 en cours d'utilisation, qui par un jeu de galets de renvoi est dirigée vers la machine à cigarettes. Ces moyens comprennent en outre un deuxième axe 22 de stockage et de préparation d'une bobine 23 de papier pleine. Lorsque la bobine délivrant la bande 21 est quasi vide, cette situation étant détectée par des détecteurs ou des palpeurs non représentés, des moyens de préparation et d'ouverture de la bobine 23 sont activés, ces moyens étant notamment constitués d'un bras oscillant 10 à l'extrémité libre duquel est disposé un dispositif 3 de préparation et d'ouverture de la bobine 23, ledit dispositif étant décrit en détail plus bas. Le bras oscillant 10 peut prendre deux positions, une position d'attente, représentée en traits interrompus, et une position de travail, représentée en traits continus, où le dispositif 3 est en action. Comme on le verra ultérieurement, le dispositif 3, après avoir ouvert la bobine 23, est apte à saisir la dernière spire coupée 24; en actionnant à nouveau le bras oscillant 10, cette spire 24, représentée en traits interrompus, est emmenée par le dispositif 3 qui retourne en position de repos. Par la suite, un dispositif de saisie 11, connu de la technique et ne faisant pas partie de l'invention se déplace le long d'une glissière 12 pour venir saisir la spire coupée 24 et l'emmener de manière à ce que sur une partie du trajet de la bande 21, cette nouvelle bande, représentée en 24A, suive un trajet parallèle et proche de la bande 21. Un dispositif de jonctionnement, schématisé en 13, pouvant par exemple être du type décrit dans le brevet EP-B-0.662.437, peut ensuite être actionné pour le jonctionnement de la bande 24A avec la bande 21. Dans ce qui précède, seul le dispositif référencé en 10 et 3 fait partie de l'invention, le reste de la machine 1 a été décrit sommairement ci-dessus afin de se rendre compte du contexte dans lequel peut fonctionner le dispositif selon l'invention. En particulier les caractéristiques de la machine 1 d'alimentation en papier mentionnées ici ne le sont qu'à titre d'exemple, le dispositif de préparation et d'ouverture de bobine étant apte à fonctionner sur d'autres types de machines.Figure 1 shows a front view of a machine 1 feeding a cigarette machine (not shown) with a strip of paper and allowing the connection of two strips of paper. The paper supply means 2 comprise in particular a first axis 20 for unwinding a strip of paper 21 in use, which by a set of deflection rollers is directed towards the cigarette machine. These means further include a second axis 22 for storing and preparing a reel 23 of full paper. When the reel delivering the strip 21 is almost empty, this situation being detected by detectors or probes not shown, means for preparing and opening the reel 23 are activated, these means notably being constituted by a swinging arm 10 at the free end of which is arranged a device 3 for preparing and opening the coil 23, said device being described in detail below. The swinging arm 10 can take two positions, a waiting position, shown in broken lines, and a working position, shown in solid lines, where the device 3 is in action. As will be seen later, the device 3, after having opened the coil 23, is capable of gripping the last cut turn 24; by actuating the oscillating arm 10 again, this turn 24, shown in broken lines, is driven by the device 3 which returns to the rest position. Subsequently, a device gripping 11, known in the art and not part of the invention moves along a slide 12 to grip the cut coil 24 and take it so that on part of the path of the strip 21, this new strip, shown at 24A, follows a parallel path close to the strip 21. A joining device, shown diagrammatically at 13, which can for example be of the type described in patent EP-B-0.662.437, can then be actuated for joining the strip 24A with the strip 21. In the above, only the device referenced in 10 and 3 is part of the invention, the rest of the machine 1 has been described briefly above in order to be give an account of the context in which the device according to the invention can operate. In particular, the characteristics of the paper feeding machine 1 mentioned here are only by way of example, the reel preparation and opening device being able to operate on other types of machines.

Les figures 2, A, B, C et D montrent le dispositif de préparation et de coupe 3 mentionné plus haut vu de côté durant quatre étapes successives du procédé, alors que les figures 3, A, B, C et D montrent une partie du même dispositif vu de face alors que la figure 3E le montre durant une cinquième étape.Figures 2, A, B, C and D show the preparation and cutting device 3 mentioned above seen from the side during four successive stages of the process, while Figures 3, A, B, C and D show part of the same device seen from the front while FIG. 3E shows it during a fifth step.

Par préparation, on entend toute opération effectuée sur la bobine 23 avant la coupe de la spire supérieure 24 de ladite bobine. Comme on le voit notamment sur la figure 2A et comme mentionné précédemment, le dispositif 3 est monté à l'extrémité du bras oscillant 10. Il est constitué en particulier d'un premier vérin 30 dont le corps est fixé au bras oscillant 10 et dont la tige 30A est reliée à un premier support 31 sur une face duquel est fixée l'extrémité d'une lame plate 32. En comparant les figures 2A et 2B, on voit qu'en actionnant le vérin 30, il est possible de positionner la lame plate 32 selon, soit une position avancée comme sur la figure 2A, soit une position rétractée comme sur la figure 2B. En position rétractée, l'extrémité libre de la lame 32 est en retrait de la face antérieure de la bobine de papier 23, alors qu'en position avancée elle dépasse l'autre face de la bobine 23. Le dispositif 3 comprend en outre un deuxième vérin 33, dont le corps est lui aussi fixé au bras oscillant 10 et dont la tige 33A est reliée à un deuxième support 34 sur lequel est fixée une lame coupante 35. En comparant les figures 2A et 2D, on voit qu'en actionnant le vérin 33, il est possible de faire avancer, respectivement reculer l'extrémité coupante 35A de la lame 35 sur toute la largeur de la bobine 23 et de lui imposer ainsi un mouvement de va-et-vient. Le dispositif 3 comprend en outre un troisième support 36 fixé de manière rigide au bras oscillant 10, ce troisième support étant prolongé par une languette d'appui 37. Le troisième support 36 porte aussi un support de serrage 38 en forme de L et pivotant autour d'un axe perpendiculaire au L, la branche du support 38 orientée vers la bobine 23 portant une plaque de serrage 38A alors que la branche 38B peut être actionnée par un levier 31A solidaire du premier support 31. En observant les figures 3, on voit que la lame plate 32 est mince mais relativement large; directement au-dessus de cette lame on trouve le support de serrage 38 et la plaque de serrage 38A, ainsi que la lame coupante 35. La languette d'appui 37 est légèrement décalée par rapport à la lame plate 32, étant disposée de l'autre côté de la plaque de serrage 38A que la lame coupante 35. La distance entre la face inférieure d'appui 37A de la languette d'appui 37 et la face supérieure de la lame plate 32 est de quelques dixièmes de mm, dépendant de l'épaisseur du papier ou du matériau formant la bande et du nombre de spires à saisir et couper. De préférence des moyens de réglage connus peuvent être utilisés pour ajuster cette distance afin de couper au minimum une seule spire. Des moyens non représentés peuvent être prévus pour positionner angulairement la bobine 23 sur son axe, de manière à ce que la coupe de la spire supérieure 24 ait lieu en un endroit relativement éloigné de celui où ladite spire supérieure est collée sur la spire qui lui succède, respectivement pas en un endroit à proximité immédiate de ce point de collage; il est ainsi possible de minimiser la longueur de papier à éliminer. Ce positionnement angulaire peut être obtenu soit par l'opérateur de la machine, soit par un moyen automatique. Vu que la pointe avant de la lame plate 32 est destinée à s'intercaler entre deux spires de la bobine 23, cette pointe a une forme adaptée à cette fonction.By preparation is meant any operation carried out on the coil 23 before the upper coil 24 of said coil is cut. As can be seen in particular in FIG. 2A and as mentioned previously, the device 3 is mounted at the end of the swing arm 10. It consists in particular of a first jack 30 whose body is fixed to the swing arm 10 and of which the rod 30A is connected to a first support 31 on one face of which the end of a flat blade 32 is fixed. By comparing FIGS. 2A and 2B, it can be seen that by actuating the jack 30, it is possible to position the flat blade 32 according to either an advanced position as in FIG. 2A, or a retracted position as in FIG. 2B. In the retracted position, the free end of the blade 32 is set back from the front face of the paper reel 23, while in the advanced position it projects beyond the other face of the reel 23. The device 3 further comprises a second cylinder 33, the body of which is also fixed to the swinging arm 10 and the rod 33A of which is connected to a second support 34 on which is fixed a cutting blade 35. By comparing FIGS. 2A and 2D, it can be seen that by actuating the jack 33, it is possible to make the cutting end 35A of the blade 35 move forward or backward respectively over the entire width of the coil 23 and thus impose on it a back and forth movement. The device 3 further comprises a third support 36 rigidly fixed to the swinging arm 10, this third support being extended by a support tongue 37. The third support 36 also carries an L-shaped clamping support 38 and pivoting around with an axis perpendicular to L, the branch of the support 38 oriented towards the coil 23 carrying a clamping plate 38A while the branch 38B can be actuated by a lever 31A secured to the first support 31. By observing Figures 3, we see that the flat blade 32 is thin but relatively wide; directly above this blade there is the clamping support 38 and the clamping plate 38A, as well as the cutting blade 35. The support tongue 37 is slightly offset with respect to the flat blade 32, being arranged with the other side of the clamping plate 38A than the cutting blade 35. The distance between the lower support face 37A of the support tongue 37 and the upper face of the flat blade 32 is a few tenths of a mm, depending on the thickness of the paper or material forming the strip and the number of turns to be gripped and cut. Preferably known adjustment means can be used to adjust this distance in order to cut at least a single turn. Means not shown may be provided for angularly positioning the coil 23 on its axis, so that the cutting of the upper turn 24 takes place at a location relatively distant from that where said upper turn is glued to the turn which follows it. , respectively not in a location in the immediate vicinity of this bonding point; it is thus possible to minimize the length of paper to be eliminated. This angular positioning can be obtained either by the operator of the machine, or by an automatic means. Since the front tip of the flat blade 32 is intended to be inserted between two turns of the coil 23, this tip has a shape adapted to this function.

Le fonctionnement du dispositif 3 peut maintenant être décrit. Lorsque le bras oscillant 10 est actionné par un vérin rotatif (non représenté) pour venir appuyer le dispositif 3 contre la bobine 23, dans la forme d'exécution décrite ici le vérin 30 est actionné afin de faire avancer la lame plate 32; l'avance du support 31 entraîne l'abaissement de la plaque de serrage 38A par l'action du levier 31A sur la portion 38A du support 38. La plaque de serrage 38A vient légèrement en contact avec la face supérieure de la lame plate 32 afin de l'empêcher de fléchir. Le bras oscillant est actionné jusqu'à ce que la face inférieure de la lame plate 32 entre en contact avec une portion de la spire supérieure 24 de la bobine 23; lorsque ce contact est établi, le mouvement de déplacement du bras oscillant 10 s'arrête. Vu la largeur de la lame plate 32, le contact entre le dispositif 3 et la spire supérieure 24 est très doux et ne risque pas d'abîmer ou de marquer cette spire, quelle que soit la qualité du matériau disposé sur la bobine 23, la force de pression dépendant essentiellement d'une pression résiduelle réglable dans le vérin rotatif actionnant le bras oscillant 10. Cette première étape du procédé est représentée aux figures 2A et 3A. Lors de l'étape suivante représentée aux figures 2B et 3B, le vérin 30 est actionné afin de retirer la lame 32 en arrière; le dispositif 3, n'étant alors plus appuyé sur la spire supérieure 24, continue alors un très léger mouvement en direction de la bobine 23 jusqu'à ce que la face inférieure d'appui 37A de la languette d'appui 37 vienne à son tour en contact avec la spire supérieure 24. Comme le levier 31A s'est dégagé du support 38, la plaque de serrage 38A repose librement sur la spire 24, sans pression. Ensuite, et comme on le voit aux figures 2C et 3C, la lame plate 3? est à nouveau avancée; vu le léger mouvement du dispositif 3 vers la bobine 23 que l'on a eu à l'étape précédente, le plan de la lame plate 32 est situé juste dessous une ou plusieurs des spires supérieures 24 de la bobine 23. La lame plate 32 s'introduit donc, par le flanc de la bobine, au-dessous de cette ou ces spires supérieures et traverse ainsi toute l'épaisseur de la bobine 23. Vu l'avance de la lame plate 32, la plaque de serrage 38A est à nouveau pressée contre ladite lame, serrant ainsi fortement la ou les spires 24 prises entre la face supérieure de la lame plate 32 et la face inférieure de la plaque de serrage 38A. Les figures 2D et 3D montrent l'opération de coupe, le vérin 33 étant actionné pour entraîner la lame de coupe 35 afin de couper la ou les spires 24 disposées au-dessus de la lame plate 32. Comme on le voit aux figures 4A et 4B, la lame plate 32 peut comporter une rainure 32A disposée parallèlement à son axe longitudinal et correspondant à la trace que fait la portion aiguisée 35A de la lame coupante 35 sur la lame plate 32. Cette rainure 32A permet un guidage de la portion aiguisée 35A, évitant que celle-ci dévie de son chemin rectiligne lors du mouvement de va-et-vient provoquant la coupe. Vu que cette lame plate, fait office d'écran de protection, les spires de la bobine 23 disposées directement au-dessous de la lame plate 32 ne peuvent être entamées par la portion aiguisée 35A de la lame de coupe 35. Selon la qualité du matériau et le nombre de spires à couper, le mouvement de va-et-vient de la lame de coupe 35 peut être répété une ou plusieurs fois. Pour l'étape suivante représentée à la figure 3E, la lame de coupe 35 est retirée, la lame plate 32 restant avancée, enserrant de ce fait la ou les spires 24 avec la plaque de serrage 38A. Le bras oscillant 10 est à nouveau actionné afin d'éloigner le dispositif 3 de la bobine 23, celle-ci étant alors mise en rotation par la traction exercée sur la ou les spires supérieures 24 ou alors par un moyen auxiliaire non représenté; l'extrémité coupée de la bande est emmenée pour être traitée comme expliqué précédemment en regard de la figure 1. Dans le cas où plusieurs spires ont été coupées, seule la dernière reste attachée à la bobine 23; les segments coupés des spires supérieures à la dernière sont éliminés par des moyens connus.The operation of the device 3 can now be described. When the swinging arm 10 is actuated by a rotary actuator (not shown) to press the device 3 against the coil 23, in the embodiment described here the actuator 30 is actuated in order to advance the flat blade 32; the advance of the support 31 causes the clamping plate 38A to be lowered by the action of the lever 31A on the portion 38A of the support 38. The clamping plate 38A comes into slight contact with the upper face of the flat blade 32 in order to prevent it from bending. The swinging arm is actuated until the underside of the flat blade 32 comes into contact with a portion of the upper coil 24 of the coil 23; when this contact is established, the movement of movement of the oscillating arm 10 stops. Given the width of the flat blade 32, the contact between the device 3 and the upper turn 24 is very gentle and does not risk damaging or marking this turn, whatever the quality of the material placed on the reel 23, the pressure force essentially dependent on an adjustable residual pressure in the rotary actuator actuating the oscillating arm 10. This first step of the method is shown in FIGS. 2A and 3A. During the next step shown in Figures 2B and 3B, the cylinder 30 is actuated to remove the blade 32 back; the device 3, then no longer supported on the upper turn 24, then continues a very slight movement in the direction of the coil 23 until the lower support face 37A of the support tongue 37 comes to its tower in contact with the upper coil 24. As the lever 31A has disengaged from the support 38, the clamping plate 38A rests freely on the coil 24, without pressure. Then, and as seen in Figures 2C and 3C, the flat blade 3? is advanced again; given the slight movement of the device 3 towards the coil 23 that we had in the previous step, the plane of the flat blade 32 is located just below one or more of the upper turns 24 of the coil 23. The flat blade 32 is therefore introduced, by the side of the coil, below this or these upper turns and thus crosses the entire thickness of the coil 23. In view of the advance of the flat blade 32, the clamping plate 38A is at pressed again against said blade, thus tightly tightening the turn or turns 24 taken between the upper face of the flat blade 32 and the lower face of the clamping plate 38A. Figures 2D and 3D show the cutting operation, the cylinder 33 being actuated to drive the cutting blade 35 in order to cut the turn or turns 24 arranged above the flat blade 32. As can be seen in Figures 4A and 4B, the flat blade 32 may have a groove 32A disposed parallel to its longitudinal axis and corresponding to the trace made by the sharpened portion 35A of the cutting blade 35 on the flat blade 32. This groove 32A allows guidance of the sharpened portion 35A , preventing it from deviating from its rectilinear path during the back-and-forth movement causing the cut. Since this flat blade acts as a protective screen, the turns of the coil 23 arranged directly below the flat blade 32 cannot be started by the sharpened portion 35A of the cutting blade 35. Depending on the quality of the material and the number of turns to be cut, the movement back and forth of the cutting blade 35 can be repeated one or more times. For the next step shown in FIG. 3E, the cutting blade 35 is withdrawn, the flat blade 32 remaining advanced, thereby enclosing the coil (s) 24 with the clamping plate 38A. The oscillating arm 10 is again actuated in order to move the device 3 away from the coil 23, the latter then being rotated by the traction exerted on the upper turn or turns 24 or else by an auxiliary means not shown; the cut end of the strip is taken to be treated as explained above with reference to FIG. 1. In the case where several turns have been cut, only the last remains attached to the coil 23; the cut segments of the turns greater than the last are eliminated by known means.

Les vérins 30 et 33 sont de préférence des vérins à double effet, pneumatiques ou hydrauliques, bien que d'autres moyens d'actionnement de la lame plate 32 et de la lame coupante 35 puissent être envisagés. On remarque en outre sur la figure 2A que la lame coupante 35 et fixée au support 34 par des moyens à vis 35B permettant de changer rapidement la lame 35 lorsqu'elle est usée ainsi que de régler sa position par rapport à la lame plate 32.The cylinders 30 and 33 are preferably double-acting cylinders, pneumatic or hydraulic, although other means for actuating the flat blade 32 and the cutting blade 35 can be envisaged. It is further noted in FIG. 2A that the cutting blade 35 and fixed to the support 34 by screw means 35B allowing the blade 35 to be quickly changed when it is worn as well as to adjust its position relative to the flat blade 32.

Un point important du procédé est d'arriver à positionner exactement la lame plate 32 de manière à ce qu'elle puisse ensuite facilement être glissée sous la spire supérieure 24 de la bobine 23. Dans la forme d'exécution du dispositif décrite ci-dessus, ce positionnement est effectué en deux étapes, approche du dispositif 3 lorsque la lame plate 32 est avancée, puis retrait de cette lame 32 pour appuyer la languette d'appui 37 sur la spire supérieure 24. D'autres moyens peuvent être prévus pour arriver à cette étape du procédé, si la place disponible sur le dispositif le permet, la languette d'appui 37 peut avoir une largeur suffisante pour être directement amenée en contact avec la spire supérieure 24 lors du déplacement du bras oscillant 10, des moyens de palpage séparés du bras oscillant 10 ou des détecteurs peuvent aussi être prévus pour déterminer la position selon laquelle le bras oscillant 10 doit s'arrêter.An important point of the process is to arrive at exactly positioning the flat blade 32 so that it can then easily be slid under the upper turn 24 of the coil 23. In the embodiment of the device described above , this positioning is carried out in two stages, approach of the device 3 when the flat blade 32 is advanced, then removal of this blade 32 to press the support tab 37 on the upper turn 24. Other means can be provided to arrive at this stage of the process, if the space available on the device allows it, the support tongue 37 may have a sufficient width to be brought directly into contact with the upper turn 24 during the movement of the oscillating arm 10, the feeler means separated from the swing arm 10 or detectors may also be provided to determine the position in which the swing arm 10 should stop.

Lors des différentes étapes du procédé décrit, sauf la dernière, la bobine 23 reste généralement fixe, sans mouvement de rotation autour de son axe. Toutefois, lors de l'étape d'introduction de la lame plate.32, et afin de faciliter cette introduction entre les spires de la bobine, celle-ci peut être animée d'un lent mouvement de rotation, de préférence en sens inverse de celui de son déroulement normal, afin que durant ce mouvement de rotation la lame plate 32 tende à être repoussée vers le haut de par l'enroulement en spirale des spires de la bobine.During the various stages of the process described, except for the last, the coil 23 remains generally stationary, with no rotational movement around its axis. However, during the step of introducing the flat blade. 32, and in order to facilitate this introduction between the turns of the coil, the latter can be animated by a slow rotational movement, preferably in the opposite direction to that of its normal course, so that during this rotational movement the flat blade 32 tends to be pushed up by the spiral winding of the turns of the coil.

Dans le cas où les spires de la bobine 23 sont serrées de manière à ce qu'il soit difficile d'y introduire la lame plate 32, il est possible de desserrer légèrement les spires supérieures avant que le dispositif 3 ne soit amené contre la spire supérieur 24, comme représenté à la figure 5. Pour ceci, le dispositif peut comprendre en outre un dispositif d'appui radial 39 comportant à son extrémité proche de la bobine une roulette 39A. Le dispositif d'appui 39 est indépendant du dispositif 3 et est placé en amont de celui-ci relativement au sens de déroulement normal de la bobine 23. Avant que le dispositif 3 n'entre en contact avec la spire supérieure 24, le dispositif d'appui 39 est appuyé avec une certaine pression, radialement par rapport à la bobine 23 au moyen d'un actionneur pneumatique ou hydraulique non représenté, la pression étant transmise aux spires supérieures par l'intermédiaire de la roulette 39A. En faisant alors pivoter la bobine 23 selon le sens contraire à celui de son déroulement normal, soit celui indiqué par la flèche sur la figure 5, on obtient un desserrement ou un relâchement des spires supérieures 24, ce qui facilitera ultérieurement l'introduction de la lame plate 32.In the case where the turns of the coil 23 are tightened so that it is difficult to introduce the flat blade 32 therein, it is possible to slightly loosen the upper turns before the device 3 is brought against the turn upper 24, as shown in Figure 5. For this, the device may further comprise a radial support device 39 having at its end close to the coil a roller 39A. The support device 39 is independent of the device 3 and is placed upstream of the latter relative to the normal direction of unwinding of the coil 23. Before the device 3 comes into contact with the upper turn 24, the device d support 39 is pressed with a certain pressure, radially relative to the coil 23 by means of a pneumatic or hydraulic actuator not shown, the pressure being transmitted to the upper turns via the roller 39A. By then rotating the coil 23 in the opposite direction to that of its normal course, that is to say that indicated by the arrow in FIG. 5, one obtains a loosening or a loosening of the upper turns 24, which will subsequently facilitate the introduction of the flat blade 32.

Ainsi, par le procédé et le dispositif selon l'invention, qui sont facilement adaptables sur une ligne de fabrication de cigarettes, on est sûr d'obtenir une coupe propre de la spire supérieure de la bobine pleine, sans que la spire qui lui est directement inférieure ne soit endommagée. Le dispositif décrit est relativement simple de conception, nécessitant peu de moyens de contrôle ou d'activation, ce qui le rend particulièrement fiable et peu onéreux.Thus, by the method and the device according to the invention, which are easily adaptable on a cigarette manufacturing line, it is certain to obtain a clean cut of the upper turn of the full reel, without the turn which is attached to it. directly below is damaged. The device described is relatively simple in design, requiring few means of control or activation, which makes it particularly reliable and inexpensive.

Comme mentionné précédemment le procédé et le dispositif décrits permettent aussi la préparation et l'ouverture d'une bobine d'un autre matériau que du papier; l'homme du métier saura adapter si nécessaire certains des moyens décrits ici à cet autre usage. De même la forme d'exécution préférentielle décrite de l'invention ne représente qu'une forme d'exécution possible, des variantes de l'un ou l'autre des éléments décrits pouvant être envisagées par l'homme du métier sans sortir du cadre de l'invention.As mentioned previously, the process and the device described also allow the preparation and opening of a reel of another material. only paper; those skilled in the art will be able to adapt some of the means described here for this other use if necessary. Likewise, the preferred embodiment described of the invention represents only one possible embodiment, variants of one or the other of the elements described can be envisaged by a person skilled in the art without departing from the scope. of the invention.

Claims (23)

Procédé de préparation et d'ouverture d'une bobine (23) constituée d'une bande d'un matériau souple enroulée en spires superposées et comportant une spire supérieure (24) dont l'extrémité libre est fixée sur la spire qui lui est directement inférieure, ladite bobine étant disposée sur un axe support (22) et comportant deux flancs parallèles, caractérisé en ce qu'une lame plate (32) est introduite entre deux spires successives par le flanc de la bobine, sur toute la largeur de ladite bobine, de manière à ce qu'au moins une spire (24) reste disposée par dessus la lame plate (32), l'opération de coupe de la ou des spires (24) disposées par dessus la lame plate ayant lieu après l'introduction de ladite lame plate.Method for preparing and opening a coil (23) consisting of a strip of flexible material wound in superimposed turns and comprising an upper turn (24) whose free end is fixed to the turn which is directly to it lower, said coil being arranged on a support axis (22) and comprising two parallel flanks, characterized in that a flat blade (32) is introduced between two successive turns by the flank of the coil, over the entire width of said coil , so that at least one turn (24) remains disposed above the flat blade (32), the cutting operation of the turn (s) (24) disposed above the flat blade taking place after the introduction of said flat blade. Procédé selon la revendication 1, caractérisé en ce qu'un mouvement d'approche d'un dispositif (3) de préparation et d'ouverture de la bobine comportant ladite lame plate (32) est commandé avant l'introduction de ladite lame plate, ledit mouvement d'approche s'arrêtant lorsqu'une surface d'appui dudit dispositif entre en contact avec la spire supérieure (24) de la bobine (23).Method according to claim 1, characterized in that an approach movement of a device (3) for preparing and opening the coil comprising said flat blade (32) is controlled before the introduction of said flat blade, said approach movement stopping when a bearing surface of said device comes into contact with the upper turn (24) of the coil (23). Procédé selon la revendication 2, caractérisé en ce que la position angulaire de la bobine (23) sur son axe support (22) est ajustée de manière à ce que ledit dispositif (3) de préparation et d'ouverture de la bobine vienne en appui sur la spire supérieure (24) en un endroit éloigné de l'endroit où l'extrémité libre de la spire supérieure est fixée sur la spire qui lui est directement inférieure.Method according to claim 2, characterized in that the angular position of the reel (23) on its support axis (22) is adjusted so that said device (3) for preparing and opening the reel comes to bear on the upper turn (24) at a location distant from the place where the free end of the upper turn is fixed on the turn which is directly below it. Procédé selon l'une des revendications 2 ou 3, caractérisé en ce que ladite surface d'appui est constituée par la surface inférieure de ladite lame plate (32) disposée en position avancée, ladite lame plate étant ensuite rétractée de manière à ce qu'une autre surface d'appui (37A) dudit dispositif vienne en contact avec ladite spire supérieure (24).Method according to one of claims 2 or 3, characterized in that said bearing surface is constituted by the lower surface of said flat blade (32) disposed in the advanced position, said flat blade then being retracted so that another bearing surface (37A) of said device comes into contact with said upper turn (24). Procédé selon l'une des revendications précédentes, caractérisé en ce que après introduction de la lame plate (32), l'ouverture de la bobine peut être commandée en actionnant une lame de coupe (35),selon un mouvement de va-et-vient, sectionnant uniquement la ou les spires (24) disposées par dessus la lame plate (32), ladite lame plate faisant office d'écran de protection des spires inférieures.Method according to one of the preceding claims, characterized in that after the introduction of the flat blade (32), the opening of the spool can be controlled by actuating a cutting blade (35), according to a movement back and forth, cutting only the turn (s) (24) arranged over the flat blade (32), said flat blade acting as a protective screen for the lower turns. Procédé selon la revendication 5, caractérisé en ce qu'un serrage de la ou des spires coupées (24) est commandé lors de l'opération de coupe, ledit serrage étant ensuite maintenu lorsqu'un éloignement du dispositif (3) par rapport à la bobine (23) est commandé, de manière à ce que l'extrémité libre de la spire supérieure (24) de la bobine soit emmenée pour une opération ultérieure de raccordement de ladite extrémité libre (24A) sur une autre bande de matériau souple (21).Method according to claim 5, characterized in that a tightening of the cut turn (s) (24) is controlled during the cutting operation, said tightening being then maintained when the device (3) is moved away from the coil (23) is controlled, so that the free end of the upper turn (24) of the coil is taken for a subsequent operation of connection of said free end (24A) on another strip of flexible material (21 ). Procédé selon l'une des revendications précédentes, caractérisé en ce que la bobine (23) est immobile lors du mouvement d'approche du dispositif (3), lors de l'appui dudit dispositif sur la spire supérieure (24), lors de l'introduction de la lame plate (32) sous la ou les spires supérieures (24), lors de la coupe et du serrage desdites spires supérieures.Method according to one of the preceding claims, characterized in that the coil (23) is immobile during the approach movement of the device (3), when the said device is pressed on the upper turn (24), during the 'introduction of the flat blade (32) under the upper turn (s) (24), when cutting and tightening said upper turns. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que la bobine (23) est animée d'un mouvement de rotation à vitesse réduite lors de l'introduction de la lame plate (32).Method according to one of claims 1 to 6, characterized in that the coil (23) is driven in a rotational movement at reduced speed during the introduction of the flat blade (32). Procédé selon l'une des revendications précédentes, caractérisé en ce qu'une pression radiale est appliquée sur une portion de la spire supérieure (24) avant que la surface d'appui du dispositif (3) de préparation et d'ouverture de la bobine n'entre en contact avec ladite spire supérieure, la bobine (23) étant alors animée d'un mouvement de rotation à vitesse réduite lors de cette opération afin de détendre la ou les spires supérieures (24).Method according to one of the preceding claims, characterized in that a radial pressure is applied to a portion of the upper coil (24) before the bearing surface of the device (3) for preparing and opening the coil does not come into contact with said upper turn, the coil (23) then being driven in a rotational movement at reduced speed during this operation in order to relax the upper turn (s) (24). Procédé selon l'une des revendications 8 ou 9, caractérisé en ce que ledit mouvement de rotation a lieu selon le sens opposé à celui de déroulement normal de la bobine.Method according to one of claims 8 or 9, characterized in that said rotational movement takes place in the opposite direction to that of normal unwinding of the coil. Dispositif pour la préparation et l'ouverture d'une bobine (23) constituée d'une bande d'un matériau souple enroulée en spires superposées et comportant une spire supérieure (24) dont l'extrémité libre est fixée sur la spire qui lui est directement inférieure, ladite bobine (23) étant disposée sur un axe support (22) et comportant deux flancs parallèles, caractérisé en ce qu'il comprend des moyens de déplacement (10) aptes à positionner ledit dispositif en contact avec ladite spire supérieure, une lame plate (32) fixée à un support (31), des moyens (30,30A) de déplacement dudit support, respectivement de ladite lame plate étant prévus pour disposer la lame plate soit en position avancée, soit en position rétractée, des moyens d'appui constitués d'une languette d'appui (37) comportant une surface d'appui (37A) dirigée vers une portion de surface de ladite spire supérieure, des moyens de coupe constitués d'une lame coupante (35) apte à se déplacer selon un mouvement de va-et-vient sur toute la largeur de la bobine (23), la profondeur de coupe étant limitée par la lame plate (32) faisant office d'écran de protection des spires inférieures, et des moyens de serrage (38A) aptes à serrer ladite spire coupée (24) entre lesdits moyens et ladite lame plate.Device for preparing and opening a reel (23) consisting of a strip of flexible material wound in superimposed turns and comprising an upper turn (24), the free end of which is fixed to the turn which is directly below it, said coil (23) being disposed on a support axis (22) and comprising two parallel sides, characterized in that it comprises displacement means (10) able to position said device in contact with said upper turn, a flat blade (32) fixed to a support (31), means (30,30A) for displacement of said support, respectively of said blade flat being provided to arrange the flat blade either in the advanced position or in the retracted position, support means consisting of a support tab (37) having a support surface (37A) directed towards a surface portion of said upper turn, cutting means consisting of a cutting blade (35) capable of moving in a reciprocating movement over the entire width of the spool (23), the depth of cut being limited by the blade flat (32) serving as protection screen for the lower turns, and clamping means (38A) capable of clamping said cut turn (24) between said means and said flat blade. Dispositif selon la revendication 8, caractérisé en ce que la surface inférieure de ladite lame plate (32) en position avancée est apte à servir de surface d'appui lors de la prise de contact entre le dispositif et la spire supérieure (24) de la bobine (23).Device according to Claim 8, characterized in that the lower surface of the said flat blade (32) in the advanced position is capable of serving as a bearing surface when contact is made between the device and the upper turn (24) of the coil (23). Dispositif selon l'une des revendications 11 ou 12, caractérisé en ce que la distance entre la surface d'appui (37A) de la languette d'appui (37) et la surface supérieure de la lame plate (32) est ajustable, ladite surface d'appui (37A) étant en retrait par rapport à ladite surface supérieure de la lame plate.Device according to one of claims 11 or 12, characterized in that the distance between the bearing surface (37A) of the bearing tongue (37) and the upper surface of the flat blade (32) is adjustable, said bearing surface (37A) being set back relative to said upper surface of the flat blade. Dispositif selon la revendication 13, caractérisé en ce que ladite distance entre la surface d'appui (37A) de la languette d'appui (37) et la surface supérieure de la lame plate (32) est équivalente à au moins l'épaisseur d'une spire de la bande du matériau souple constituant la bobine (23).Device according to claim 13, characterized in that said distance between the bearing surface (37A) of the bearing tongue (37) and the upper surface of the flat blade (32) is equivalent to at least the thickness d 'A turn of the strip of flexible material constituting the coil (23). Dispositif selon l'une des revendications 11 à 14, caractérisé en ce que les moyens permettant le déplacement de la lame plate (32) et/ou de la lame coupante (35) sont constitués de vérins (30,33) pneumatiques ou hydrauliques.Device according to one of claims 11 to 14, characterized in that the means allowing the displacement of the flat blade (32) and / or the cutting blade (35) consist of pneumatic or hydraulic cylinders (30,33). Dispositif selon l'une des revendications 11 à 15, caractérisé en ce qu'il comprend en outre des moyens de guidage (32A) de la lame de coupe (35).Device according to one of claims 11 to 15, characterized in that it further comprises guide means (32A) of the cutting blade (35). Dispositif selon la revendication 16, caractérisé en ce que les moyens de guidage de la lame de coupe (35) sont constitués d'une rainure longitudinale (32A) aménagée sur la surface supérieure de la lame plate (32).Device according to claim 16, characterized in that the means for guiding the cutting blade (35) consist of a longitudinal groove (32A) provided on the upper surface of the flat blade (32). Dispositif selon la revendication 11, caractérisé en ce que les moyens de serrage (38A) sont actionnés lors du déplacement de la lame plate (32).Device according to claim 11, characterized in that the clamping means (38A) are actuated during the movement of the flat blade (32). Dispositif selon l'une des revendications 11 à 18 caractérisé en ce qu'il comprend en outre un moyen de pressage (39) apte à appliquer une pression radiale sur une portion de la spire supérieure (24) lesdits moyens de pressage étant disposés en amont de la lame plate (32) dans le sens de déroulement des spiresDevice according to one of claims 11 to 18 characterized in that it further comprises a pressing means (39) able to apply a radial pressure on a portion of the upper turn (24) said pressing means being arranged upstream of the flat blade (32) in the direction of unwinding of the turns Dispositif selon l'une des revendications 11 à 19, caractérisé en ce qu'il comprend en outre des moyens permettant de maintenir la bobine (23) immobile, ou de la mettre en rotation autour de son axe support (22), selon une faible vitesse.Device according to one of claims 11 to 19, characterized in that it further comprises means making it possible to keep the coil (23) immobile, or to rotate it around its support axis (22), according to a low speed. Dispositif selon la revendication 20, caractérisé en ce que lesdits moyens de mise en rotation de la bobine sont aptes à la faire pivoter selon le sens opposé au sens de déroulement de la bobine afin de détendre la ou les spires supérieures (24).Device according to Claim 20, characterized in that the said means for rotating the reel are capable of rotating it in the direction opposite to the direction of unwinding of the reel in order to relax the upper turn (s) (24). Dispositif selon l'une des revendications11 à 21, caractérisé en ce qu'il est associé à un dispositif de raccordement (13) de deux bandes (21,24A) du matériau souple.Device according to one of claims 11 to 21, characterized in that it is associated with a connecting device (13) of two strips (21,24A) of the flexible material. Utilisation d'un dispositif selon l'une des revendications 11 à 22 dans une ligne de fabrication de cigarettes ou de fabrication ou de pose de filtres à cigarettes.Use of a device according to one of claims 11 to 22 in a line for manufacturing cigarettes or for manufacturing or fitting cigarette filters.
EP95810754A 1994-12-12 1995-12-01 Method and device for preparing and opening of a reel Expired - Lifetime EP0716996B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP95810754A EP0716996B1 (en) 1994-12-12 1995-12-01 Method and device for preparing and opening of a reel

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP94810716A EP0721905B1 (en) 1994-12-12 1994-12-12 Method and device for preparing the opening of a reel
EP94810716 1994-12-12
EP95810754A EP0716996B1 (en) 1994-12-12 1995-12-01 Method and device for preparing and opening of a reel

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EP0716996A2 true EP0716996A2 (en) 1996-06-19
EP0716996A3 EP0716996A3 (en) 1997-10-29
EP0716996B1 EP0716996B1 (en) 2001-08-22

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DE10343423A1 (en) * 2003-09-19 2005-04-14 Voith Paper Patent Gmbh Device which is especially reel-spool storage station has winding reel producing rotational movement for rolling off of material roll, and winding reel and cutting device are movable in relation to one another in traversing direction
CN105151865A (en) * 2015-08-07 2015-12-16 倪娉娉 Skin picking system for roll paper

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EP0318427B1 (en) 1987-11-12 1991-07-17 Fabriques De Tabac Reunies S.A. Method and splicing device for strips of paper for the continuous feeding of a machine, particularly for making cigarettes
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Publication number Priority date Publication date Assignee Title
DE10343423A1 (en) * 2003-09-19 2005-04-14 Voith Paper Patent Gmbh Device which is especially reel-spool storage station has winding reel producing rotational movement for rolling off of material roll, and winding reel and cutting device are movable in relation to one another in traversing direction
CN105151865A (en) * 2015-08-07 2015-12-16 倪娉娉 Skin picking system for roll paper

Also Published As

Publication number Publication date
EP0716996A3 (en) 1997-10-29
EP0716996B1 (en) 2001-08-22

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