EP0475886B1 - Method and means for opening a paper roll and for splicing the end of a paper ribbon to the end of a second paper ribbon - Google Patents

Method and means for opening a paper roll and for splicing the end of a paper ribbon to the end of a second paper ribbon Download PDF

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Publication number
EP0475886B1
EP0475886B1 EP91810587A EP91810587A EP0475886B1 EP 0475886 B1 EP0475886 B1 EP 0475886B1 EP 91810587 A EP91810587 A EP 91810587A EP 91810587 A EP91810587 A EP 91810587A EP 0475886 B1 EP0475886 B1 EP 0475886B1
Authority
EP
European Patent Office
Prior art keywords
paper
reel
web
aluminium foil
cylindrical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91810587A
Other languages
German (de)
French (fr)
Other versions
EP0475886A1 (en
Inventor
Domingos Da Silva
Marc Budin
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
Application filed by Fabriques de Tabac Reunies SA filed Critical Fabriques de Tabac Reunies SA
Publication of EP0475886A1 publication Critical patent/EP0475886A1/en
Application granted granted Critical
Publication of EP0475886B1 publication Critical patent/EP0475886B1/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
    • B65H19/18—Attaching, e.g. pasting, the replacement web to the expiring web
    • B65H19/1857—Support arrangement of web rolls
    • B65H19/1863—Support arrangement of web rolls with translatory or arcuated movement of the roll supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F5/00—Attaching together sheets, strips or webs; Reinforcing edges
    • B31F5/02—Attaching together sheets, strips or webs; Reinforcing edges by crimping or slotting or perforating
    • B31F5/022—Attaching together sheets, strips or webs; Reinforcing edges by crimping or slotting or perforating using a rotary tool
    • 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
    • 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
    • B65H19/1805—Flying splicing, i.e. the expiring web moving during splicing contact
    • B65H19/1826—Flying splicing, i.e. the expiring web moving during splicing contact taking place at a distance from the replacement roll
    • B65H19/1836—Flying splicing, i.e. the expiring web moving during splicing contact taking place at a distance from the replacement roll the replacement web being accelerated or running prior to splicing contact
    • 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
    • B65H2301/461—Processing webs in splicing process
    • B65H2301/4611—Processing webs in splicing process before splicing
    • B65H2301/46115—Processing webs in splicing process before splicing by bringing leading edge to splicing station, e.g. by chain or belt
    • 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
    • B65H2301/463—Splicing splicing means, i.e. means by which a web end is bound to another web end
    • B65H2301/4632—Simultaneous deformation of the two web ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/54—Cigarette making

Definitions

  • the cigarette industry uses paper strips to form the paper cylinder containing the tobacco; these strips of paper are supplied in wafers, consisting of a large number of turns wound successively on themselves in order to constitute a ribbon of paper of great length.
  • the paper which must surround the filter of cigarettes paper which is of a different type than that directly surrounding the tobacco of the cigarette.
  • the methods and devices according to the prior art are no longer suitable, given the particular mechanical characteristics of this type of paper.
  • the paper surrounding the filter of a cigarette has a structure and a texture different from that of cigarette paper, with glue as binder, which increases its roughness and decreases its porosity;
  • the paper ribbon coming to surround the tobacco cylinder is then placed longitudinally with respect to said tobacco cylinder, which means that the width of the paper ribbon is generally quite small, of the order of 25 mm, it is not the same for the paper tape surrounding the filter of cigarettes where said paper tape is wound transversely relative to the filter; the machine generally having two filters arranged end to end, and the filters being able to be relatively long, one can have ribbons of paper clearly wider than previously, being able to go up to 70 mm.
  • the object of the invention is to propose a method and a device making it possible first of all to open a full wafer, then to assemble the outer end of the paper strip coming from this full wafer to the 'inner end of a nearly empty cake, this method and this device being applicable to paper ribbons to surround cigarette filters.
  • An advantage of the device according to the invention is that the wafer opening device and that of assembly are combined on the same machine, thereby reducing the space required for these devices; on the other hand, given the particular characteristics of the assembly of the two ribbons, assembly which is particularly resistant to the traction of one ribbon on the other, this method and this device can be used for the assembly of ribbons of other kinds. as paper ribbons, ribbons made of thin aluminum sheets for example. The characteristics of the process and of the device do not preclude the assembly of cigarette paper ribbons.
  • the machine cutting the paper tape is shown schematically in Figure 1 by its frame 1; it comprises in particular a robotic arm 10, provided with an arm head 11 capable of carrying out the movements of the wafers 2, 2a, 2b, as well as those of the roller support 14, as described below.
  • This robotic arm 10, as well as its head 11 are not part of the invention and can be of any type known in the art, only some of the operations performed by said arm being new.
  • a paper wafer 2, driven in rotation by a first axis of rotation 12, unwinds its paper tape 20 towards the machine responsible for placing it around the tobacco, respectively around the cigarette filter, this machine not being shown on the figure.
  • a second wafer 2a was removed by the robotic arm from a storage position where we can distinguish a third wafer 2b on standby, and was brought and fixed on a second axis of rotation 13.
  • the wafers 2a and 2b are full and their outer coil is possibly covered with a strong paper protective strip.
  • the process of opening the full wafer 2a is implemented, firstly by making bring, by the robotic arm 10, the roller support 14 near the wafer 2a, so that the gripping cylinder 3 comes tangentially into contact with the outer circumference of the wafer 2a.
  • FIG. 2A The detail of the following steps in the process of opening the solid wafer 2a is shown in FIG. 2.
  • the gripping cylinder 3 has been brought into contact with the solid wafer 2a, and has been pivoted so that when 'it is open, as shown in the figure, it is ready to receive the strands of the outer turns.
  • the detail of the opening and closing mechanism of the gripping cylinder 3 will be explained later.
  • a first cutting device 4, fixed to the support 14 and comprising a cutting blade 40 is actuated by a piston device 41, to be brought against the solid wafer 2a so that the blade 40 cuts the possible protective strip of strong paper surrounding the wafer as well as some of the outer turns of said wafer, by a transverse movement of said blade.
  • FIG. 2B where a blowing device 5 has been brought directly near the cut made previously; this blowing device 5 is supplied by a source of pressurized air not shown and in particular comprises a plurality of nozzles 50, 51, 52, gradually oriented, which are actuated sequentially.
  • the first nozzle 50 which is directed against the cut made on the wafer 2a, is actuated first and lifts the cut ends 21, the second nozzle 51, blowing in a direction more recessed than the first, detaches the cut ends 21 and begins to bend them in the direction of the opening 30 of the gripping cylinder 3, while the third nozzle 52, directed still further back than the previous one, is now actuated to introduce the cut ends 21 inside the opening 30.
  • the blowing device 5 has been described with three nozzles 50, 51 and 52; it is obvious that it could have a different number of nozzles, or even have only one, the device then being pivoted at a certain angle around its axis in order to lift, detach, bend and bring the cut turns 21 inside the opening 30 of the gripping cylinder 3.
  • the gripping cylinder 3 is then closed, as shown in FIG. 2C, the movable part 31 of said cylinder pinching the cut ends 21 against the fixed part 32 of said cylinder .
  • Figure 2D shows that the gripping cylinder 3 has been rotated, driving the cut turns 21 and therefore the full wafer 2a; this rotation lasts long enough to wind all the outer turns cut around the gripping cylinder 3, as well as a certain length of paper tape from the wafer 2a.
  • FIG. 3A representing a perspective view of the active portion of the gripping cylinder in half-open, respectively semi-closed position
  • Figure 3B is a partial sectional view of the same device.
  • the gripping cylinder 3 consists of two main parts: a movable part 31 and a fixed part 32.
  • the active portion of the fixed part 32 consists of a hollow cylindrical tubular element, in which an opening 30 corresponding to a sector portion of said tubular element of 60 ° has been removed, defining the two faces 30a and 30b.
  • the fixed part 32 has the appearance d '' a sort of cylindrical comb, consisting of teeth 34 separated by notches 33.
  • the movable part 31 consists of a portion of cylinder sector 35 of 60 °, whose outside diameter corresponds to the inside diameter of the cylindrical tubular element of the fixed part 32; this portion of cylinder sector 35 is surmounted by a number of teeth 36, each of them corresponding in terms of location and dimensions to a notch 33 of the fixed part.
  • the outer diameter of the cylinder portion defined by the outer surface of the teeth 36 corresponds to the outer diameter of the cylinder defined by the fixed part 32.
  • the cylinder sector portion 35 of the movable part 31 is extended by a cylindrical shaft 37 pivoting at the interior of a cylindrical cavity 38 located in extension of the active portion of the fixed part 32; thus, by actuating in rotation in one direction or the other the cylindrical shaft 37, the movable part 31 which is fixed to it is pivoted, and consequently the teeth 36 of the movable part 31 are moved in the notches 33 of the fixed part 32, this movement taking place between two extreme positions, the first being the open position where the ends 36a of the teeth 36 abut against the bottoms 33a of the notches 33, the ends 36b of the teeth 36 then being aligned on the face 30b corresponding to the ends of the teeth 34 of the fixed part 32, which defines the opening 30 of the gripping cylinder, while the second extreme position is that where the teeth 36 have pivoted in the notches 33, until the ends 36b of said teeth are
  • the gripping cylinder 3 can open and close, due to the relative pivoting movement of the movable part 31 relative to the fixed part 32, the outer surface of said gripping cylinder remaining substantially cylindrical, subject the opening 30 in the open position as well as the notches 33 as well as those arranged between the teeth 36 of the movable part 31, the outside diameter of said cylindrical surface remaining constant for each position of the movable part 31 relative to the fixed part 32.
  • Figures 3A and 3B show a gripping cylinder 3, the fixed part 32 and the movable part 31 each have eight teeth; it is obvious that the cylinder according to the invention can include any number of teeth, this number being mainly determined by the width of the paper tape to be grasped; similarly the angle of opening and closing of the cylinder has been mentioned as being 60 °, any other angle giving a sufficient opening of the cylinder 30 can be adopted.
  • the head 11 of the robotic arm 10 will grip the support 14 and bring it to the low position, shown in dashed lines.
  • the gripping cylinder 3 carries with it the first turn of paper 22 coming from the wafer 2a, and lays it parallel and at a short distance from the paper tape 20 still unwinding from the almost empty wafer 2.
  • the rotational speeds of the cylinder 3, as well as of the wafer 2a are adjusted so that the ribbon 22 remains tensioned and is unwound at the same speed as the paper ribbon 20 for unwinding the wafer 2.
  • a pneumatic device symbolized by 6, then operates successively: a second cutting device 60, cutting the ribbon 20 unwinding from the almost empty wafer 2, slightly upstream from where the junction between the two ribbons 20 and 22 will be made, brings the two pressure rollers 70 and 71 closer together so that they make the connection between the two paper ribbons 20 and 22, move these two rollers away again when a certain length of the two ribbons 20 and 22 has been joined and finally actuates a third cutting device 61 in order to cut the end of r uban 22 still attached to the gripping cylinder 3.
  • the end of the paper tape 20 is now connected to the end of the tape 22 and it is the wafer 2a which then feeds the machine placed downstream and responsible for placing said tape around of the tobacco cylinder, respectively around the cigarette filter.
  • the succession of operations, described above, controlled by the pneumatic device 6, is carried out in a very short period of time so that the length of the ribbon where the ribbons 20 and 22 are superimposed is as short as possible.
  • the robotic arm 10 returns the support 14 to the high position, the gripping cylinder 3 opens again, which frees the free ends 21 and allows a conventional elimination device, not shown, to remove the layers of paper wrapped around the input cylinder 3. Then, the robotic arm 10 grasps the rest of the wafer 2 and eliminates it. When the wafer 2a has unwound a certain length of paper tape and has thus reached a given diameter, the robotic arm 10 will move it in order to bring it to the first axis 12 where it will continue to unwind, until it is almost empty and a new cycle of operations is ordered.
  • FIG. 4 shows the detail of the construction of the pressure roller device 7, FIG. 4A showing the two rollers 70 and 71 in perspective, arranged face-to-face, while FIG. 4B is a representation on an enlarged scale showing the interpenetration of rollers 70 and 71 between them.
  • the first pressure roller 70 is composed of a cylinder on which a plurality of cylindrical crowns 72 are arranged side by side, each of these crowns being spaced from the next by a certain spacing. Each of these crowns comprises a plurality of teeth 73, of generally triangular shape.
  • each tooth has the rotation of the roller 70 first of all the longest of the sides, according to a relatively slight slope, then the shortest of the sides according to a steeper slope .
  • the second pressure roller 71 also composed of a cylinder in which a plurality of cylindrical grooves 74 are hollow side by side, each of said grooves coming in front of a crown 72 furnished with teeth 73 of the first pressure roller 70.
  • FIG. 5 there is a representation according to two views of the assembly of the two ribbons 20 and 22.
  • FIG. 5A is a plan view of the assembly, the ribbon 22 cut at its end 22a being superimposed on the ribbon 20 cut at its end 20a. These two ends of ribbons 20a and 22a are inclined since the cut was made while the two ribbons 20 and 22 were in motion.
  • the central part of the superimposed part consists of a plurality of notches 23, arranged in a number of columns equivalent to the number of crowns 72 supporting the triangular teeth 73 of the roller 70, and according to a certain number of lines which is a function of the duration of application of the rollers 70 and 71 against each other.
  • FIG. 5B which is a section of the previous figure along a line B-B shows that the two paper ribbons 20 and 22 have been perforated and that each notch consists of two folded paper tabs; this type of assembly according to the invention, which essentially differs from the state of the art where there is simply an embossing of two superimposed tapes, without perforation of said tapes, is possible thanks to the particular conformation of the two pressure rollers 70 and 71 as well as teeth 73, according to the invention. Note in FIG. 5B, that a longitudinal pull from one ribbon to the other cannot detach them, but on the contrary makes them interpenetrate even more. FIG.
  • 5A represents the notches 23 arranged in a number of rectilinear lines; this arrangement comes from the fact that the teeth 73 on each ring 72 are aligned with one another, it is quite possible to provide a shift of the teeth between each ring, so as to have, for example, a staggered arrangement of the notches 23.
  • the method and the device according to the invention it is possible, on a single machine, to present a full wafer, to open it, to take the strip of closure paper as well as some outer turns of said full wafer, to connect the outer end of the strip of paper coming from the full wafer at the inner end of a nearly empty wafer and eliminating said almost empty reel, without interrupting the paper supply to the machine placed downstream.
  • the method and the device according to the invention have been specially developed for the connection of two strips of paper which must come to surround cigarette filters; given the characteristics and solidity of the junction where the two strips of paper are interpenetrated until the perforation, this type of connection can be used for the connection of other types of strips, whether it is strips of paper of a other composition or even strips made of thin sheets of aluminum, and this for strips of any width.

Description

L'industrie de la cigarette utilise des bandes de papier afin de constituer le cylindre de papier contenant le tabac; ces bandes de papier sont fournies en galettes, constituées d'un grand nombre de spires enroulées successivement sur elles-mêmes afin de constituer un ruban de papier de grande longueur. Il en est de même pour le papier devant entourer le filtre des cigarettes, papier qui est d'un autre type que celui entourant directement le tabac de la cigarette. Vu la cadence de fabrication élevée des machines modernes, il est avantageux de trouver un procédé et un dispositif permettant de raccorder ensemble l'extrémité extérieure d'une bande de papier d'une galette pleine à l'extrémité intérieure d'une bande de papier d'une galette qui sera prochainement vide, ceci sans interrompre l'alimentation en papier de la machine située en aval et chargée de disposer le ruban de papier autour du boudin de tabac, respectivement de disposer le ruban de papier autour du filtre.The cigarette industry uses paper strips to form the paper cylinder containing the tobacco; these strips of paper are supplied in wafers, consisting of a large number of turns wound successively on themselves in order to constitute a ribbon of paper of great length. The same is true for the paper which must surround the filter of cigarettes, paper which is of a different type than that directly surrounding the tobacco of the cigarette. Given the high production rate of modern machines, it is advantageous to find a method and a device for connecting together the outer end of a strip of paper from a solid wafer to the inner end of a strip of paper. a wafer which will soon be empty, without interrupting the paper supply to the machine located downstream and responsible for arranging the paper tape around the tobacco rod, respectively to arrange the paper tape around the filter.

Divers procédés et dispositifs ont été proposés afin de raccorder l'extrémité extérieure d'une bande de papier en provenance d'une galette pleine à l'extrémité intérieure d'une bande de papier en provenance d'une galette quasi vide; en particulier la demande de brevet EP-A-331634 décrit un procédé et un appareil d'ouverture d'une galette faite d'une bande de papier, alors que la demande de brevet EP-A-318427 décrit un procédé et une machine d'assemblage bout à bout de bandes de papier. La dernière des demandes citées, ainsi que d'autres brevets faisant partie de l'état de la technique s'appliquent au raccordement par gaufrage de bandes du papier devant venir entourer le cylindre de tabac de cigarettes. Lorsqu'on désire raccorder ensemble deux bandes du papier devant venir entourer le filtre des cigarettes, les procédés et dispositifs selon l'art antérieur ne conviennent plus, vu les caractéristiques mécaniques particulières de ce type de papier. En effet, le papier entourant le filtre d'une cigarette a une structure et une texture différentes de celles du papier à cigarettes, avec de la colle comme liant, ce qui augmente sa rugosité et diminue sa porosité; d'autre part, si le ruban de papier venant entourer le cylindre de tabac est ensuite disposé longitudinalement par rapport audit cylindre de tabac, ce qui fait que la largeur du ruban de papier est généralement assez faible, de l'ordre de 25 mm, il n'en est pas de même pour le ruban de papier venant entourer le filtre des cigarettes où ledit ruban de papier est enroulé transversalement par rapport au filtre; la machine présentant généralement deux filtres disposés bout à bout, et les filtres pouvant être relativement longs, on peut avoir des rubans de papier nettement plus larges que précédemment, soit pouvant aller jusqu'à 70 mm. Ceci, associé à la structure particulière du papier mentionnée plus haut, ne permet pas qu'un assemblage par un simple gaufrage, selon l'art antérieur, soit utilisé pour de tels rubans, la solidité de l'assemblage par gaufrage n'étant alors pas suffisante. Il est nécessaire que dans ce cas l'assemblage soit constitué d'une forte interpénétration d'un ruban de papier dans l'autre, allant jusqu'à la perforation desdits rubans. Les essemblages sont en soi connus, voir par example US-A-2945462 et DE-A-2638576
   Les autres procédés d'assemblage utilisés jusqu'alors, soit généralement des procédés de collage d'une bande de papier sur une autre, ne permettent pas un travail à cadence élevée.Various methods and devices have been proposed in order to connect the outer end of a strip of paper coming from a full wafer to the inner end of a strip of paper coming from a nearly empty wafer; in particular patent application EP-A-331634 describes a method and an apparatus for opening a wafer made of a strip of paper, while patent application EP-A-318427 describes a method and a machine for end to end strips of paper. The last of the applications cited, as well as other patents forming part of the state of the technique apply to the connection by embossing of strips of paper which must surround the cylinder of tobacco for cigarettes. When it is desired to connect two strips of paper which must come to surround the filter for cigarettes, the methods and devices according to the prior art are no longer suitable, given the particular mechanical characteristics of this type of paper. Indeed, the paper surrounding the filter of a cigarette has a structure and a texture different from that of cigarette paper, with glue as binder, which increases its roughness and decreases its porosity; on the other hand, if the paper ribbon coming to surround the tobacco cylinder is then placed longitudinally with respect to said tobacco cylinder, which means that the width of the paper ribbon is generally quite small, of the order of 25 mm, it is not the same for the paper tape surrounding the filter of cigarettes where said paper tape is wound transversely relative to the filter; the machine generally having two filters arranged end to end, and the filters being able to be relatively long, one can have ribbons of paper clearly wider than previously, being able to go up to 70 mm. This, associated with the particular structure of the paper mentioned above, does not allow an assembly by a simple embossing, according to the prior art, to be used for such ribbons, the solidity of the assembly by embossing then being not sufficient. It is necessary that in this case the assembly consists of a strong interpenetration of a paper ribbon in the other, going as far as the perforation of said ribbons. The assemblies are known per se, see for example US-A-2945462 and DE-A-2638576
The other assembly methods used hitherto, generally methods of gluing from one strip of paper to another, do not allow work at high speed.

Ainsi, l'objet de l'invention est de proposer un procédé et un dispositif permettant tout d'abord d'ouvrir une galette pleine, puis d'assembler l'extrémité extérieure de la bande de papier en provenance de cette galette pleine à l'extrémité intérieure d'une galette quasi vide, ce procédé et ce dispositif étant applicables à des rubans de papier devant entourer des filtres de cigarettes. Un avantage du dispositif selon l'invention est que le dispositif d'ouverture de galette et celui d'assemblage sont réunis sur la même machine, diminuant de ce fait l'encombrement nécessaire à ces équipements; d'autre part, vu les caractéristiques particulières de l'assemblage des deux rubans, assemblage particulièrement résistant à la traction d'un ruban sur l'autre, ce procédé et ce dispositif peuvent être utilisés pour l'assemblage de rubans d'autres sortes que des rubans de papier, des rubans constitués de feuilles minces en aluminium par exemple. Les caractéristiques du procédé et du dispositif ne s'opposent pas à l'assemblage de rubans de papier à cigarettes.Thus, the object of the invention is to propose a method and a device making it possible first of all to open a full wafer, then to assemble the outer end of the paper strip coming from this full wafer to the 'inner end of a nearly empty cake, this method and this device being applicable to paper ribbons to surround cigarette filters. An advantage of the device according to the invention is that the wafer opening device and that of assembly are combined on the same machine, thereby reducing the space required for these devices; on the other hand, given the particular characteristics of the assembly of the two ribbons, assembly which is particularly resistant to the traction of one ribbon on the other, this method and this device can be used for the assembly of ribbons of other kinds. as paper ribbons, ribbons made of thin aluminum sheets for example. The characteristics of the process and of the device do not preclude the assembly of cigarette paper ribbons.

Les caractéristiques du procédé et du dispositif selon l'invention sont conformes aux parties caractérisantes des revendications.The characteristics of the method and of the device according to the invention are in accordance with the characterizing parts of the claims.

Le procédé et le dispositif selon l'invention sont plus particulièrement compréhensibles à partir du dessin en annexe avec les figures où:

  • la figure 1 est une vue schématique de côté représentant une machine équipée du dispositif selon l'invention,
  • la figure 2, séparée en figures 2A, 2B, 2C et 2D, représente plusieurs étapes de fonctionnement de l'élément de saisie cylindrique,
  • la figure 3 est une vue d'un élément de saisie cylindrique, avec la figure 3A montrant cet élément en perspective, alors que la figure 3B est une coupe partielle dudit élément,
  • la figure 4 est une vue des rouleaux presseurs, avec la figure 4A montrant ces rouleaux en perspective, alors que la figure 4B est une représentation à échelle agrandie de l'interpénétration desdits rouleaux, et
  • la figure 5 représente le type d'assemblage par perforation d'une bande de papier sur une autre, la figure 5A étant une vue en plan alors que la figure 5B en est une coupe longitudinale.
The method and the device according to the invention are more particularly understandable from the appended drawing with the figures where:
  • FIG. 1 is a schematic side view representing a machine equipped with the device according to the invention,
  • FIG. 2, separated in FIGS. 2A, 2B, 2C and 2D, represents several stages of operation of the cylindrical gripping element,
  • Figure 3 is a view of a cylindrical gripping element, with Figure 3A showing this element in perspective, while Figure 3B is a section partial of said element,
  • FIG. 4 is a view of the pressure rollers, with FIG. 4A showing these rollers in perspective, while FIG. 4B is a representation on an enlarged scale of the interpenetration of said rollers, and
  • 5 shows the type of assembly by perforating one strip of paper on another, Figure 5A being a plan view while Figure 5B is a longitudinal section.

La machine débitant le ruban de papier est représentée schématiquement à la figure 1 par son bâti 1; elle comprend en particulier un bras robotisé 10, muni d'une tête de bras 11 capable d'effectuer les déplacements des galettes 2, 2a, 2b, ainsi que ceux du support de rouleaux 14, tels que décrits plus bas. Ce bras robotisé 10, ainsi que sa tête 11 ne font pas partie de l'invention et peuvent être de n'importe quel type connu de la technique, seules certaines des opérations effectuées par ledit bras étant nouvelles. Une galette de papier 2, entraînée en rotation par un premier axe de rotation 12, dévide son ruban de papier 20 vers la machine chargée de le disposer autour du tabac, respectivement autour du filtre de cigarette, cette machine n'étant pas représentée sur la figure. Une seconde galette 2a a été prélevée par le bras robotisé, depuis une position de stockage où on distingue une troisième galette 2b en attente, et a été amenée et fixée sur un deuxième axe de rotation 13. Les galettes 2a et 2b sont pleines et leur spire extérieure est éventuellement recouverte d'une bande de protection en papier fort. Lorsque la galette 2 est quasi vide, c'est-à-dire lorsque son diamètre extérieur a atteint une valeur de consigne donnée, le processus d'ouverture de la galette pleine 2a est mis en oeuvre, tout d'abord en faisant amener, par le bras robotisé 10, le support de rouleaux 14 à proximité de la galette 2a, de telle manière que le cylindre de saisie 3 arrive tangentiellement en contact avec la circonférence extérieure de la galette 2a.The machine cutting the paper tape is shown schematically in Figure 1 by its frame 1; it comprises in particular a robotic arm 10, provided with an arm head 11 capable of carrying out the movements of the wafers 2, 2a, 2b, as well as those of the roller support 14, as described below. This robotic arm 10, as well as its head 11 are not part of the invention and can be of any type known in the art, only some of the operations performed by said arm being new. A paper wafer 2, driven in rotation by a first axis of rotation 12, unwinds its paper tape 20 towards the machine responsible for placing it around the tobacco, respectively around the cigarette filter, this machine not being shown on the figure. A second wafer 2a was removed by the robotic arm from a storage position where we can distinguish a third wafer 2b on standby, and was brought and fixed on a second axis of rotation 13. The wafers 2a and 2b are full and their outer coil is possibly covered with a strong paper protective strip. When the wafer 2 is almost empty, that is to say when its outside diameter has reached a given set value, the process of opening the full wafer 2a is implemented, firstly by making bring, by the robotic arm 10, the roller support 14 near the wafer 2a, so that the gripping cylinder 3 comes tangentially into contact with the outer circumference of the wafer 2a.

Le détail des étapes suivantes du processus d'ouverture de la galette pleine 2a est représenté à la figure 2. A la figure 2A, le cylindre de saisie 3 a été amené au contact de la galette pleine 2a, et a été pivoté afin que lorsqu'il est ouvert, comme représenté sur la figure, il soit prêt à réceptionner les brins des spires extérieures. Le détail du mécanisme d'ouverture et de fermeture du cylindre de saisie 3 sera expliqué plus loin. Un premier dispositif de coupe 4, fixé au support 14 et comportant une lame coupante 40 est actionné par un dispositif à piston 41, pour être amené contre la galette pleine 2a afin que la lame 40 coupe l'éventuelle bande de protection de papier fort entourant la galette ainsi que quelques unes des spires extérieures de ladite galette, par un mouvement transversal de ladite lame. Cette opération terminée, le dispositif de coupe 4 est éloigné de la galette. L'étape suivante du processus est visible à la figure 2B, où un dispositif de soufflage 5 a été amené directement à proximité de la coupure faite précédemment; ce dispositif de soufflage 5 est alimenté par une source d'air sous pression non représentée et comporte en particulier une pluralité de buses 50, 51, 52, graduellement orientées, qui sont actionnées séquentiellement. Ainsi la première buse 50, qui est dirigée contre la coupure faite sur la galette 2a, est actionnée en premier et soulève les extrémités coupées 21, la deuxième buse 51, soufflant selon une direction plus en retrait que la première, détache les extrémités coupées 21 et commence à les courber en direction de l'ouverture 30 du cylindre de saisie 3, alors que la troisième buse 52, dirigée encore plus en retrait que la précédente, est maintenant actionnée pour introduire les extrémités coupées 21 à l'intérieur de l'ouverture 30. Le dispositif de soufflage 5 a été décrit avec trois buses 50, 51 et 52; il est évident qu'il pourrait comporter un nombre différent de buses, voir n'en comporter qu'une seule, le dispositif étant alors pivotant selon un certain angle autour de son axe afin de soulever, détacher, courber et amener les spires coupées 21 à l'intérieur de l'ouverture 30 du cylindre de saisie 3. Le cylindre de saisie 3 est alors refermé, comme représenté à la figure 2C, la partie mobile 31 dudit cylindre venant pincer les extrémités coupées 21 contre la partie fixe 32 dudit cylindre. La figure 2D montre que le cylindre de saisie 3 a été mis en rotation, entraînant les spires coupées 21 et par conséquent la galette pleine 2a; cette rotation dure suffisamment longtemps pour enrouler toutes les spires extérieures coupées autour du cylindre de saisie 3, ainsi qu'une certaine longueur de ruban de papier en provenance de la galette 2a.The detail of the following steps in the process of opening the solid wafer 2a is shown in FIG. 2. In FIG. 2A, the gripping cylinder 3 has been brought into contact with the solid wafer 2a, and has been pivoted so that when 'it is open, as shown in the figure, it is ready to receive the strands of the outer turns. The detail of the opening and closing mechanism of the gripping cylinder 3 will be explained later. A first cutting device 4, fixed to the support 14 and comprising a cutting blade 40 is actuated by a piston device 41, to be brought against the solid wafer 2a so that the blade 40 cuts the possible protective strip of strong paper surrounding the wafer as well as some of the outer turns of said wafer, by a transverse movement of said blade. This operation finished, the cutting device 4 is moved away from the cake. The next stage of the process is visible in FIG. 2B, where a blowing device 5 has been brought directly near the cut made previously; this blowing device 5 is supplied by a source of pressurized air not shown and in particular comprises a plurality of nozzles 50, 51, 52, gradually oriented, which are actuated sequentially. Thus the first nozzle 50, which is directed against the cut made on the wafer 2a, is actuated first and lifts the cut ends 21, the second nozzle 51, blowing in a direction more recessed than the first, detaches the cut ends 21 and begins to bend them in the direction of the opening 30 of the gripping cylinder 3, while the third nozzle 52, directed still further back than the previous one, is now actuated to introduce the cut ends 21 inside the opening 30. The blowing device 5 has been described with three nozzles 50, 51 and 52; it is obvious that it could have a different number of nozzles, or even have only one, the device then being pivoted at a certain angle around its axis in order to lift, detach, bend and bring the cut turns 21 inside the opening 30 of the gripping cylinder 3. The gripping cylinder 3 is then closed, as shown in FIG. 2C, the movable part 31 of said cylinder pinching the cut ends 21 against the fixed part 32 of said cylinder . Figure 2D shows that the gripping cylinder 3 has been rotated, driving the cut turns 21 and therefore the full wafer 2a; this rotation lasts long enough to wind all the outer turns cut around the gripping cylinder 3, as well as a certain length of paper tape from the wafer 2a.

Le détail de construction et de fonctionnement de l'élément de saisie cylindrique 3 est visible à la figure 3 avec la figure 3A représentant une vue en perspective de la portion active du cylindre de saisie en position demi-ouverte, respectivement demi-fermée, alors que la figure 3B est une vue en coupe partielle du même dispositif. Comme il a été dit plus haut, le cylindre de saisie 3 est constitué de deux pièces principales: une partie mobile 31 et une partie fixe 32. La portion active de la partie fixe 32 est constituée d'un élément tubulaire cylindrique creux, dans lequel une ouverture 30 correspondant à une portion de secteur dudit élément tubulaire de 60° a été ôtée, définissant les deux faces 30a et 30b. Sur la face 30b, un certain nombre d'encoches 33 ont été creusée selon une portion de secteur de l'élément tubulaire qui est aussi de 60°, ces encoches 33 étant disposées côte à côte le long de l'axe longitudinal du cylindre 3 et séparées par des dents 34. Ainsi, la partie fixe 32 a l'allure d'une sorte de peigne cylindrique, constitué des dents 34 séparées par des encoches 33. La partie mobile 31 est constituée d'une portion de secteur de cylindre 35 de 60°, dont le diamètre extérieur correspond au diamètre intérieur de l'élément tubulaire cylindrique de la partie fixe 32; cette portion de secteur de cylindre 35 est surmontée d'un certain nombre de dents 36, chacune d'entre elles correspondant au point de vue emplacement et dimensions à une encoche 33 de la partie fixe. Le diamètre extérieur de la portion de cylindre définie par la surface extérieure des dents 36 correspond au diamètre extérieur du cylindre défini par la partie fixe 32. La portion de secteur de cylindre 35 de la partie mobile 31 est prolongée par un arbre cylindrique 37 pivotant à l'intérieur d'une cavité cylindrique 38 située en prolongement de la portion active de la partie fixe 32; ainsi, en actionnant en rotation dans un sens ou dans l'autre l'arbre cylindrique 37, on fait pivoter la partie mobile 31 qui lui est fixée, et par conséquent on fait se déplacer les dents 36 de la partie mobile 31 dans les encoches 33 de la partie fixe 32, ce mouvement ayant lieu entre deux positions extrêmes, la première étant la position ouverte où les extrémités 36a des dents 36 viennent buter contre les fonds 33a des encoches 33, les extrémités 36b des dents 36 étant alors alignées sur la face 30b correspondant aux extrémités des dents 34 de la partie fixe 32, ce qui définit l'ouverture 30 du cylindre de saisie, alors que la seconde position extrême est celle où les dents 36 ont pivoté dans les encoches 33, jusqu'à ce que les extrémités 36b desdites dents soient en contact avec la surface 30a de la partie fixe 32, respectivement aient serré les spires coupées 21 entre les extrémités 36b et la surface 30a. De cette manière, le cylindre de saisie 3 peut s'ouvrir et se fermer, de par le mouvement relatif de pivotement de la partie mobile 31 par rapport à la partie fixe 32, la surface extérieure dudit cylindre de saisie restant sensiblement cylindrique, sous réserve de l'ouverture 30 en position ouverte ainsi que des encoches 33 ainsi que de celles disposées entre les dents 36 de la partie mobile 31, le diamètre extérieur de ladite surface cylindrique restant constant pour chaque position de la partie mobile 31 relativement à la partie fixe 32. Comme mentionné plus haut, lorsque le cylindre de saisie 3 est en position fermée, pinçant les spires coupées 21, il est mis en rotation autour de son axe longitudinal, la partie mobile 31 restant en position fermée par rapport à la partie fixe 32. Les moyens utilisés tant pour actionner la partie mobile 31 par rapport à la partie fixe 32, que pour mettre en rotation l'ensemble du cylindre de saisie 3 sont conventionnels et ne sont donc pas représentés sur -le dessin. Les figures 3A et 3B représentent un cylindre de saisie 3 dont la partie fixe 32 ainsi que la partie mobile 31 comportent chacune huit dents; il est évident que le cylindre selon l'invention peut comporter n'importe quel nombre de dents, ce nombre étant principalement déterminé par la largeur du ruban de papier à saisir; de même l'angle d'ouverture et de fermeture du cylindre a été mentionné comme étant de 60°, tout autre angle donnant une ouverture 30 du cylindre de saisie suffisante, peut être adopté.The detail of construction and operation of the cylindrical gripping element 3 is visible in FIG. 3 with FIG. 3A representing a perspective view of the active portion of the gripping cylinder in half-open, respectively semi-closed position, then that Figure 3B is a partial sectional view of the same device. As mentioned above, the gripping cylinder 3 consists of two main parts: a movable part 31 and a fixed part 32. The active portion of the fixed part 32 consists of a hollow cylindrical tubular element, in which an opening 30 corresponding to a sector portion of said tubular element of 60 ° has been removed, defining the two faces 30a and 30b. On the face 30b, a number of notches 33 have been dug in a portion sector of the tubular element which is also 60 °, these notches 33 being arranged side by side along the longitudinal axis of the cylinder 3 and separated by teeth 34. Thus, the fixed part 32 has the appearance d '' a sort of cylindrical comb, consisting of teeth 34 separated by notches 33. The movable part 31 consists of a portion of cylinder sector 35 of 60 °, whose outside diameter corresponds to the inside diameter of the cylindrical tubular element of the fixed part 32; this portion of cylinder sector 35 is surmounted by a number of teeth 36, each of them corresponding in terms of location and dimensions to a notch 33 of the fixed part. The outer diameter of the cylinder portion defined by the outer surface of the teeth 36 corresponds to the outer diameter of the cylinder defined by the fixed part 32. The cylinder sector portion 35 of the movable part 31 is extended by a cylindrical shaft 37 pivoting at the interior of a cylindrical cavity 38 located in extension of the active portion of the fixed part 32; thus, by actuating in rotation in one direction or the other the cylindrical shaft 37, the movable part 31 which is fixed to it is pivoted, and consequently the teeth 36 of the movable part 31 are moved in the notches 33 of the fixed part 32, this movement taking place between two extreme positions, the first being the open position where the ends 36a of the teeth 36 abut against the bottoms 33a of the notches 33, the ends 36b of the teeth 36 then being aligned on the face 30b corresponding to the ends of the teeth 34 of the fixed part 32, which defines the opening 30 of the gripping cylinder, while the second extreme position is that where the teeth 36 have pivoted in the notches 33, until the ends 36b of said teeth are in contact with the surface 30a of the fixed part 32, respectively have clamped the cut turns 21 between the ends 36b and the surface 30a. In this way, the gripping cylinder 3 can open and close, due to the relative pivoting movement of the movable part 31 relative to the fixed part 32, the outer surface of said gripping cylinder remaining substantially cylindrical, subject the opening 30 in the open position as well as the notches 33 as well as those arranged between the teeth 36 of the movable part 31, the outside diameter of said cylindrical surface remaining constant for each position of the movable part 31 relative to the fixed part 32. As mentioned above, when the gripping cylinder 3 is in the closed position, pinching the cut turns 21, it is rotated about its longitudinal axis, the movable part 31 remaining in the closed position relative to the fixed part 32 The means used both to actuate the movable part 31 relative to the fixed part 32, and to rotate the entire gripping cylinder 3 are conventional and are not nc not shown in the drawing. Figures 3A and 3B show a gripping cylinder 3, the fixed part 32 and the movable part 31 each have eight teeth; it is obvious that the cylinder according to the invention can include any number of teeth, this number being mainly determined by the width of the paper tape to be grasped; similarly the angle of opening and closing of the cylinder has been mentioned as being 60 °, any other angle giving a sufficient opening of the cylinder 30 can be adopted.

En revenant à la figure 1, la tête 11 du bras robotisé 10 va saisir le support 14 et l'amener en position basse, représentée en traitillés. En l'amenant ainsi, le cylindre de saisie 3 entraîne avec lui la première spire de papier 22 provenant de la galette 2a, et la dispose parallèlement et à faible distance du ruban de papier 20 se dévidant toujours de la galette quasi vide 2. Les vitesses de rotation du cylindre 3, ainsi que de la galette 2a sont ajustées afin que le ruban 22 reste tendu et soit dévidé à même vitesse que le ruban de papier 20 de déroulant de la galette 2. Un dispositif pneumatique, symbolisé par 6, actionne alors successivement: un deuxième dispositif de coupe 60, coupant le ruban 20 se déroulant de la galette quasi vide 2, légèrement en amont de l'endroit où sera faite la jonction entre les deux rubans 20 et 22, rapproche l'un de l'autre les deux rouleaux presseurs 70 et 71 afin qu'ils effectuent la liaison entre les deux rubans de papier 20 et 22, éloigne à nouveau ces deux rouleaux lorsqu'une certaine longueur des deux rubans 20 et 22 a été jonctionnée et finalement actionne un troisième dispositif de coupe 61 afin de couper l'extrémité de ruban 22 encore rattachée au cylindre de saisie 3. L'extrémité du ruban de papier 20 est maintenant raccordé à l'extrémité du ruban 22 et c'est la galette 2a qui alimente alors la machine placée en aval et chargée de disposer ledit ruban autour du cylindre de tabac, respectivement autour du filtre de cigarette. La succession des opérations, décrites plus haut, commandées par le dispositif pneumatique 6, s'effectue en un laps de temps très court afin que la longueur du ruban où on a une superposition des rubans 20 et 22 soit la plus faible possible.Returning to FIG. 1, the head 11 of the robotic arm 10 will grip the support 14 and bring it to the low position, shown in dashed lines. By bringing it thus, the gripping cylinder 3 carries with it the first turn of paper 22 coming from the wafer 2a, and lays it parallel and at a short distance from the paper tape 20 still unwinding from the almost empty wafer 2. The rotational speeds of the cylinder 3, as well as of the wafer 2a are adjusted so that the ribbon 22 remains tensioned and is unwound at the same speed as the paper ribbon 20 for unwinding the wafer 2. A pneumatic device, symbolized by 6, then operates successively: a second cutting device 60, cutting the ribbon 20 unwinding from the almost empty wafer 2, slightly upstream from where the junction between the two ribbons 20 and 22 will be made, brings the two pressure rollers 70 and 71 closer together so that they make the connection between the two paper ribbons 20 and 22, move these two rollers away again when a certain length of the two ribbons 20 and 22 has been joined and finally actuates a third cutting device 61 in order to cut the end of r uban 22 still attached to the gripping cylinder 3. The end of the paper tape 20 is now connected to the end of the tape 22 and it is the wafer 2a which then feeds the machine placed downstream and responsible for placing said tape around of the tobacco cylinder, respectively around the cigarette filter. The succession of operations, described above, controlled by the pneumatic device 6, is carried out in a very short period of time so that the length of the ribbon where the ribbons 20 and 22 are superimposed is as short as possible.

En fin de cycle, le bras robotisé 10 ramène le support 14 en position haute, le cylindre de saisie 3 s'ouvre à nouveau, ce qui libère les extrémités libres 21 et permet à un dispositif d'élimination conventionnel, non représenté, d'éliminer les couches de papier enroulées autour du cylindre de saisie 3. Ensuite, le bras robotisé 10 saisit le reste de la galette 2 et l'élimine. Lorsque la galette 2a aura dévidé une certaine longueur de ruban de papier et aura ainsi atteint un diamètre donné, le bras robotisé 10 la déplacera afin de l'amener sur le premier axe 12 où elle continuera à se dévider, jusqu'à ce qu'elle soit quasi vide et qu'un nouveau cycle d'opérations soit commandé.At the end of the cycle, the robotic arm 10 returns the support 14 to the high position, the gripping cylinder 3 opens again, which frees the free ends 21 and allows a conventional elimination device, not shown, to remove the layers of paper wrapped around the input cylinder 3. Then, the robotic arm 10 grasps the rest of the wafer 2 and eliminates it. When the wafer 2a has unwound a certain length of paper tape and has thus reached a given diameter, the robotic arm 10 will move it in order to bring it to the first axis 12 where it will continue to unwind, until it is almost empty and a new cycle of operations is ordered.

La figure 4 montre le détail de la construction du dispositif de rouleaux presseurs 7, la figure 4A représentant les deux rouleaux 70 et 71 en perspective, disposés face-à-face, alors que la figure 4B est une représentation à échelle agrandie montrant l'interpénétration des rouleaux 70 et 71 entre eux. Le premier rouleau presseur 70 est composé d'un cylindre sur lequel une pluralité de couronnes 72 cylindriques sont disposées côte-à-côte, chacune de ces couronnes étant espacée de la suivant d'un certain espacement. Chacune de ces couronnes comporte une pluralité de dents 73, de forme généralement triangulaire. Les deux côtés accessibles du triangle formé par chaque dent sont inégaux, chaque dent présentant lors de la rotation du rouleau 70 tout d'abord le plus long des côtés, selon une pente relativement faible, puis le plus court des côtés selon une pente plus abrupte. En face du rouleau 70, on trouve le second rouleau presseur 71 composé lui aussi d'un cylindre dans lequel une pluralité de gorges cylindriques 74 sont creusées côte-à-côte, chacune desdites gorges venant en face d'une couronne 72 garnie des dents 73 du premier rouleau presseur 70. Ainsi lorsque les deux rubans de papier 20 et 22 sont serrés entre les deux rouleaux 70 et 71, les deux rubans sont assemblés, la forme triangulaire asymétrique des dents 73, ainsi que leur interpénétration dans les gorges 74 amenant les deux rubans de papier à se déchirer en face de chaque dent 73 et à constituer un assemblage comme décrit ci-dessous.FIG. 4 shows the detail of the construction of the pressure roller device 7, FIG. 4A showing the two rollers 70 and 71 in perspective, arranged face-to-face, while FIG. 4B is a representation on an enlarged scale showing the interpenetration of rollers 70 and 71 between them. The first pressure roller 70 is composed of a cylinder on which a plurality of cylindrical crowns 72 are arranged side by side, each of these crowns being spaced from the next by a certain spacing. Each of these crowns comprises a plurality of teeth 73, of generally triangular shape. The two accessible sides of the triangle formed by each tooth are unequal, each tooth having the rotation of the roller 70 first of all the longest of the sides, according to a relatively slight slope, then the shortest of the sides according to a steeper slope . Opposite the roller 70, there is the second pressure roller 71 also composed of a cylinder in which a plurality of cylindrical grooves 74 are hollow side by side, each of said grooves coming in front of a crown 72 furnished with teeth 73 of the first pressure roller 70. Thus when the two paper tapes 20 and 22 are clamped between the two rollers 70 and 71, the two tapes are assembled, the asymmetrical triangular shape of the teeth 73, as well as their interpenetration in the grooves 74 bringing the two tapes of paper to be torn in front of each tooth 73 and to constitute an assembly as described below.

A la figure 5, on a une représentation selon deux vues de l'assemblage des deux rubans 20 et 22. La figure 5A est une vue en plan de l'assemblage, le ruban 22 coupé à son extrémité 22a étant superposé au ruban 20 coupé à son extrémité 20a. Ces deux extrémités de rubans 20a et 22a sont inclinées vu que la coupe s'est faite alors que les deux rubans 20 et 22 étaient en mouvement. La partie centrale de la partie superposée est constituée d'une pluralité d'encoches 23, rangées en un nombre de colonnes équivalent au nombre de couronnes 72 supportant les dents triangulaires 73 du rouleau 70, et selon un certain nombre de lignes qui est fonction de la durée d'application des rouleaux 70 et 71 l'un contre l'autre. La figure 5B qui est une coupe de la figure précédente selon une ligne B-B montre bien que les deux rubans de papier 20 et 22 ont été perforés et que chaque encoche est constituée de deux languettes de papier repliées; ce type d'assemblage selon l'invention, qui diffère essentiellement de l'état de la technique où on a simplement un gaufrage de deux rubans superposés, sans perforation desdits rubans, est possible grâce à la conformation particulière des deux rouleaux presseurs 70 et 71 ainsi que des dents 73, selon l'invention. On remarque sur la figure 5B, qu'une traction longitudinale d'un ruban sur l'autre ne peut les détacher, mais au contraire les fait s'interpénétrer encore d'avantage. La figure 5A représente les encoches 23 rangées en un certain nombre de lignes rectilignes; cette disposition provient du fait que les dents 73 sur chaque couronne 72 sont alignées entre elles, il est tout à fait possible de prévoir un décalage des dents entre chaque couronne, de manière à avoir par exemple une disposition en quinconce des encoches 23.In FIG. 5, there is a representation according to two views of the assembly of the two ribbons 20 and 22. FIG. 5A is a plan view of the assembly, the ribbon 22 cut at its end 22a being superimposed on the ribbon 20 cut at its end 20a. These two ends of ribbons 20a and 22a are inclined since the cut was made while the two ribbons 20 and 22 were in motion. The central part of the superimposed part consists of a plurality of notches 23, arranged in a number of columns equivalent to the number of crowns 72 supporting the triangular teeth 73 of the roller 70, and according to a certain number of lines which is a function of the duration of application of the rollers 70 and 71 against each other. Figure 5B which is a section of the previous figure along a line B-B shows that the two paper ribbons 20 and 22 have been perforated and that each notch consists of two folded paper tabs; this type of assembly according to the invention, which essentially differs from the state of the art where there is simply an embossing of two superimposed tapes, without perforation of said tapes, is possible thanks to the particular conformation of the two pressure rollers 70 and 71 as well as teeth 73, according to the invention. Note in FIG. 5B, that a longitudinal pull from one ribbon to the other cannot detach them, but on the contrary makes them interpenetrate even more. FIG. 5A represents the notches 23 arranged in a number of rectilinear lines; this arrangement comes from the fact that the teeth 73 on each ring 72 are aligned with one another, it is quite possible to provide a shift of the teeth between each ring, so as to have, for example, a staggered arrangement of the notches 23.

Ainsi, par le procédé et le dispositif selon l'invention, il est possible, sur une seule machine, de présenter une galette pleine, de l'ouvrir, de prélever la bande de papier de fermeture ainsi que quelques spires extérieures de ladite galette pleine, de raccorder l'extrémité extérieure de la bande de papier en provenance de la galette pleine à l'extrémité intérieure d'une galette quasi vide et d'éliminer ladite bobine quasi vide, ceci sans interrompre l'alimentation en papier de la machine placée en aval. Le procédé et le dispositif selon l'invention, et tout particulièrement le dispositif de rouleaux presseurs, ont été spécialement développés pour le raccordement de deux bandes de papier devant venir entourer des filtres de cigarettes; vu les caractéristiques et la solidité de la jonction où les deux bandes de papier sont interpénétrées jusqu'à la perforation, ce type de raccordement peut être utilisé pour le raccordement d'autres types de bandes, que ce soit des bandes de papier d'une autre composition ou même de bandes constituées de minces feuilles d'aluminium, et ceci pour des bandes de n'importe quelle largeur.Thus, by the method and the device according to the invention, it is possible, on a single machine, to present a full wafer, to open it, to take the strip of closure paper as well as some outer turns of said full wafer, to connect the outer end of the strip of paper coming from the full wafer at the inner end of a nearly empty wafer and eliminating said almost empty reel, without interrupting the paper supply to the machine placed downstream. The method and the device according to the invention, and in particular the device of pressure rollers, have been specially developed for the connection of two strips of paper which must come to surround cigarette filters; given the characteristics and solidity of the junction where the two strips of paper are interpenetrated until the perforation, this type of connection can be used for the connection of other types of strips, whether it is strips of paper of a other composition or even strips made of thin sheets of aluminum, and this for strips of any width.

Claims (8)

  1. Method of opening a fresh reel (2a) of a web of paper or of aluminium foil wound in successive turns thereon and of connecting the leading end of the web of paper (22) or of aluminium foil of said fresh reel to the trailing end of a web of paper (20) or of aluminium foil of an expiring reel (2) rotating on a first rotating shaft (12), characterized by the following steps:
       first, actuating first cutting device (4) in order to cut a plurality of outer turns of the fresh reel along a line parallel to the axis of a second rotating shaft,
       second, bringing the cylindrical outside surface of a cylindrical seizing element (3), the axis of which is parallel to that of the first rotating shaft, into tangential contact with the cylindrical outside surface of said fresh reel, a gripping aperture (30) of said seizing element being opened in order to receive an end of cut turns (21), then said aperture is closed again in order to grip said end of the cut turns, said seizing element being set in rotation in order to wind up the group of cut turns and a few of the outer turns of said fresh reel, thereby also setting the fresh reel in rotation,
       third, the rotating seizing element is translated in order to bring it close to the web of paper of the expiring reel in such a way that the web of the fresh reel unwinds in proximity to, parallel to, and at the same speed as the web of the expiring reel,
       fourth, actuating successively: a second cutting device (60) to cut the portion of the paper web or of aluminium foil attached to the expiring reel, then a pressing roller device (7) in order to fix the web of paper or of aluminium foil coming from the fresh reel to the web of paper or of aluminium foil coming from the expiring reel, then a third cutting device (61) to cut the part of the web of paper or of aluminium foil attached to the seizing device.
  2. Method according to claim 1, characterized in that the sequence of said steps is automated, said steps being carried out without interrupting the unwinding of the web of paper or of aluminium foil.
  3. Method according to claims 1 or 2, characterized in that it is applied to the opening of reels and the splicing of strips of paper intended to encircle cigarette filters.
  4. Device for applying the method according to claim 1, comprising:
       first, a first rotating shaft (12) supporting an unwinding reel of paper (2) or of aluminium foil,
       second, a second rotating shaft (13), parallel to said first rotating shaft and supporting a fresh reel (2a) or one unwinding,
       third, a first cutting device (4) capable of cutting a certain number of outer turns of the fresh reel according to a line parallel to said second rotating shaft,
       fourth, robot arm means (10, 11) for bringing a fresh reel (2b) onto the second rotating shaft, for withdrawing said expiring reel from said first rotating shaft,
       characterized in that it comprises in addition:
       fifth, a cylindrical seizing element (3) including a gripping portion (30),
       sixth, a blower device (5) having inclined nozzles (50, 51, 52), cooperating with said seizing element and capable of separating the severed outer turns (21) on said fresh reel and introducing them into the seizing element,
       seventh, robot arm means (10, 11) capable of displacing said seizing element to bring it into proximity with the web of paper (20) or of aluminium foil of the expiring reel, and of withdrawing the unwinding reel from the second rotating shaft to bring it onto said first rotating shaft,
       eighth, a second cutting device (60) capable of cutting the part of the web attached to the expiring reel,
       ninth, a pressing roller device (7) capable of splicing the web of paper or of aluminium foil coming from the fresh reel (22) to the web of paper of of aluminium foil coming from the expiring reel,
       tenth, a third cutting device (61) capable of cutting the portion of the web attached to said seizing element upstream from the splice,
       eleventh, means for withdrawing turns of paper or of aluminium foil wound around said seizing element,
       twelfth, means for automatically guiding the process.
  5. Device according to claim 4 in which the cylindrical seizing element (3) is characterized in that it includes a jaw-like gripping portion of cylindrical segment shape (31) having an outside diameter identical to that of said seizing element, said gripping portion and in that said gripping portion is capable of being opened by pivoting of said gripping portion about the longitudinal axis of said seizing element in order to create a cavity (30) in the form of the sector of a cylinder capable of receiving a certain number of ends of outer cuts from the fresh reel, said gripping portion being able to close itself again according to a movement opposite to its opening movement in order to grip the said ends of the cuts and in that said gripping element can be set in rotation about its longitudinal axis.
  6. Device according to claim 4 in which the cylindrical seizing element is characterized in that it includes in addition means for withdrawing turns of paper wound about said element, capable of removing said turns when said gripping portion is open.
  7. Device according to claim 4 in which the blower device (5) is characterized in that it includes a plurality of said nozzles (50, 51, 52) inclined at differing angles and means for actuating said nozzles in succession in order to fold up the ends of the web of paper or of aluminium foil cut from the fresh reel and to introduce them into the cavity of the seizing element.
  8. Device according to claim 4 in which the pressing roller device (7) is characterized in that it comprises a first cylindrical roller (71) having a plurality of regularly spaced, parallel cylindrical grooves (74), and a second cylindrical roller (70) having a plurality of regularly spaced, parallel cylindrical rings (72), each of said rings being disposed opposite one of said grooves of said first roller, and in that each of said rings bears a plurality of triangular teeth (73) disposed at regular intervals along the circumference thereof.
EP91810587A 1990-08-24 1991-07-19 Method and means for opening a paper roll and for splicing the end of a paper ribbon to the end of a second paper ribbon Expired - Lifetime EP0475886B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2750/90 1990-08-24
CH275090 1990-08-24

Publications (2)

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EP0475886A1 EP0475886A1 (en) 1992-03-18
EP0475886B1 true EP0475886B1 (en) 1994-11-09

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EP91810587A Expired - Lifetime EP0475886B1 (en) 1990-08-24 1991-07-19 Method and means for opening a paper roll and for splicing the end of a paper ribbon to the end of a second paper ribbon

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US (1) US5169082A (en)
EP (1) EP0475886B1 (en)
DE (1) DE69105084T2 (en)

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WO2021203776A1 (en) * 2020-04-09 2021-10-14 昆明鼎承启鑫科技有限公司 Sheet material splicing mechanism

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WO2021203776A1 (en) * 2020-04-09 2021-10-14 昆明鼎承启鑫科技有限公司 Sheet material splicing mechanism

Also Published As

Publication number Publication date
DE69105084D1 (en) 1994-12-15
DE69105084T2 (en) 1995-05-18
US5169082A (en) 1992-12-08
EP0475886A1 (en) 1992-03-18

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