EP3245884A1 - Unité et procédé de formation d'un flux coaxial dans une machine de fabrication de cigarettes coaxiales - Google Patents

Unité et procédé de formation d'un flux coaxial dans une machine de fabrication de cigarettes coaxiales Download PDF

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Publication number
EP3245884A1
EP3245884A1 EP17171321.7A EP17171321A EP3245884A1 EP 3245884 A1 EP3245884 A1 EP 3245884A1 EP 17171321 A EP17171321 A EP 17171321A EP 3245884 A1 EP3245884 A1 EP 3245884A1
Authority
EP
European Patent Office
Prior art keywords
stretch
belt
unit
smokable material
suction
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
EP17171321.7A
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German (de)
English (en)
Other versions
EP3245884B1 (fr
Inventor
Fausto Mengoli
Ivan Eusepi
Massimo Sartoni
Luca Federici
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GD SpA
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GD SpA
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Publication of EP3245884A1 publication Critical patent/EP3245884A1/fr
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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/14—Machines of the continuous-rod type
    • A24C5/18—Forming the rod
    • A24C5/1821—Forming the rod containing different tobacco mixtures, e.g. composite rods

Definitions

  • This invention relates to a unit and a method for forming a coaxial stream in a machine for making coaxial cigarettes.
  • coaxial cigarette is used to mean a cigarette or similar smoking article in which the piece of smokable material comprises a central core and a tubular portion placed around the central core.
  • the tubular portion can be made of a first smokable material, preferably comprising shredded tobacco, and the core of a second smokable material.
  • Coaxial cigarettes are known from documents WO2007/069091 and EP503461 .
  • Document DE102013220757 schematically describes producing coaxial cigarettes by making a first stream formed by a plurality of tobacco segments, joining the first stream to a bed of tobacco fibres on a suction conveyor and placing other tobacco fibres on the first bed of tobacco fibres and on the first stream to form a second stream.
  • Document DE102013220757 thus shows a layered cigarette in which a first stream, made beforehand, is inserted between two layers of shredded tobacco. This feature does not allow obtaining a truly coaxial cigarette because it involves making a sequence of layers.
  • document DE102013220757 provides a very schematic teaching which does not tackle aspects of applicability and functionality such as centring the first stream on the first layer and controlling the streams up to the point where the cigarette rod is formed. For example, moving the first stream requires special attention at curves and changes of direction and may interfere with the placing of the further tobacco fibres.
  • Document GB2260887 describes the formation of a first stream over which two layers of shredded tobacco are placed in various ways and configurations.
  • a layer of shredded tobacco is wound around the first stream by a specific device located downstream of the suction conveyor.
  • Document GB2260887 provides a very schematic teaching, especially with reference to this embodiment, and also does not tackle the issues mentioned above with reference to document DE102013220757 .
  • This invention has for an aim to provide a unit and a method for forming a coaxial stream for a machine for making coaxial cigarettes to overcome the above mentioned drawbacks. More specifically, the aim of the invention is to provide a unit and a method for forming a coaxial stream for a machine for making coaxial cigarettes and which allow optimum control of the streams as far as the point where the cigarette rod is formed, optimum control of the materials and their correct positioning relative to each other.
  • This invention accordingly provides a unit and a method for forming a coaxial stream in a machine for making coaxial cigarettes as described in the accompanying claims.
  • the numeral 1 denotes in its entirety a cigarette making machine comprising a unit 2 for forming a coaxial stream 3 comprising an elongate central core 3a and an elongate tubular portion 3b placed around the central core 3a.
  • the tubular portion 3b is made of a first smokable material, preferably comprising shredded tobacco;
  • the core 3a is made of a second smokable material, comprising shredded tobacco (obtainable from the unit 2 of Figure 1 ), preferably of a different type from that used to make the tubular portion, or segments of one or more smokable materials (obtainable from the unit 2 of Figure 10 ).
  • the coaxial stream 3 will eventually be divided into cigarette segments used to make coaxial cigarettes, not illustrated.
  • the unit 2 comprises a first feed unit 4 for feeding the first smokable material, preferably shredded tobacco, suitable for forming the tubular portion 3b, and a second feed unit 6 for feeding the second smokable material, suitable for forming the core 3a.
  • first feed unit 4 for feeding the first smokable material, preferably shredded tobacco, suitable for forming the tubular portion 3b
  • second feed unit 6 for feeding the second smokable material, suitable for forming the core 3a.
  • first smokable material and the second smokable material are in the form of shredded tobacco 5a, 5b.
  • the first smokable material is fed by means of an air flow along a substantially vertical duct 7a defining an ascending flow of tobacco particles 5a.
  • the duct 7a is the final stretch of the first unit 4 which, in a first possible embodiment of it, is described in detail further on in this description.
  • the second smokable material is fed by means of an air flow and/or by gravity along a substantially vertical duct 7b defining a descending flow of tobacco particles 5b.
  • the duct 7b is the final stretch of the second unit 6.
  • the unit 2 also comprises a suction conveyor 8 comprising an air permeable belt 9 which is wound in a loop around a chamber 10.
  • the chamber 10 communicates with a suction unit of known type, not illustrated, and is configured to apply the suction on the belt 9 at least at some zones, for example through openings made in the wall which delimits the chamber, in known manner and not illustrated.
  • the belt 9 is wound around pulleys 9a which move it in a direction of travel "A" to define a closed path "P" which follows the lateral profile of the belt itself.
  • the first unit 4 is configured to feed the first smokable material along a first stretch "P1" of the path "P" along which the belt 9 is subjected to the suction applied by the chamber 10.
  • the suction conveyor 8, and in particular the belt 9, closes the top of the duct 7a so that the first stretch "P1" is located in a lower portion 8a of the suction conveyor 8.
  • the second unit 6 is configured to feed the second smokable material along a second stretch "P2" of the path "P" downstream of the first stretch "P1" in the direction of travel "A" of the belt 9.
  • the belt 9 is subjected to the suction applied by the chamber 10.
  • the suction conveyor 8, and in particular the belt 9 closes the bottom of the duct 7b so that the second stretch "P2" is located in an upper portion 8b of the suction conveyor 8.
  • the numeral 11 denotes shaping means located along a third stretch "P3" of the path "P" downstream of the second stretch "P2" in the direction of travel "A" of the belt 9.
  • the third stretch "P3" is also located in the upper portion 8a of the suction conveyor 8.
  • the shaping means 11 are configured to progressively deform the belt 9 as it advances along the path "P" in such a way as to wrap it around the first smokable material to form the tubular portion 3b of the coaxial stream 3 around the core 3a.
  • the shaping means 11 comprise at least two side walls 12 configured to support the belt 9 at least laterally and defining a supporting cavity 13. Transversely to the feed direction "A", the cross section of the supporting cavity changes by closing along the feed direction "A" of the belt 9 along an initial portion of the third stretch "P3" which extends up to a section 14 for forming the coaxial stream 3. In the initial portion of the third stretch "P3", the belt 9 is wound round itself along the feed direction "A" of the belt itself, following the shape of the side walls 12 and of the supporting cavity 13.
  • the transverse cross section of the supporting cavity 13 changes by opening along the feed direction "A" of the belt 9.
  • the belt 9 gradually opens out and returns to its flat shape along the feed direction "A” of the belt itself following the shape of the side walls 12 and of the supporting cavity 13.
  • the belt 9 is isolated from the chamber 10 so as not to be subjected to suction.
  • the side walls 12 meet under the belt 9 in such a way as to isolate it from the chamber 10, as illustrated in Figures 6 and 7 .
  • the belt 9 is placed in communication with the chamber 10 so as to be subjected to suction.
  • the side walls 12 are spaced apart under the belt 9, creating a channel 15 in communication with the chamber 10, as illustrated in Figures 4 and 5 .
  • the unit 2 comprises a levelling device 16 positioned between the first stretch "P1" and the second stretch "P2" and operating on a layer 17a of the first smokable material feeding out of the duct 7a. More specifically, the levelling device 16 is positioned at the lower portion 8a of the suction conveyor 8. The desired quantity of tobacco can be measured by the weight control system "W", schematically illustrated in Figure 1 , which adjusts the height of the levelling device 16.
  • the unit 2 also comprises a suction transfer conveyor 18 interposed at the top between the suction conveyor 8 and a rod forming unit 19 which, in a first possible embodiment of it, is described in detail further on in this description.
  • the suction transfer conveyor 18 is configured to transfer the coaxial stream 3 from an upper unloading station 20 of the suction conveyor 8 along the third stretch "P3" downstream of the section 14 for forming the coaxial stream to an upper loading station 21 of the rod forming unit 19.
  • the suction transfer conveyor 18 comprises an air permeable belt 22 which is wound in a loop around a chamber 23.
  • the chamber 23 communicates with a suction unit of known type, not illustrated, and is configured to apply the suction on the belt 22 at least at some zones, for example through openings made in the wall which delimits the chamber, in known manner and not illustrated.
  • the belt 23 is wound around pulleys 24 which move it in a direction of travel "B" to define a closed path "P" which follows the lateral profile of the belt itself.
  • a lower stretch 25 of the belt 22 is configured to partly wrap an upper portion of the coaxial stream 3 to define a path for transferring the coaxial stream itself.
  • the numeral 26 denotes containment walls associated with the suction transfer conveyor 18 and extending between the unloading station 20 and the loading station 21 in the lower stretch 25 of the belt 22 for laterally containing the coaxial stream 3 being transferred by the suction conveyor 8 to the rod forming unit 19.
  • a levelling device 27 is located along the transfer path to operate on the tubular portion 3b of the coaxial stream 3.
  • the containment walls 26 advantageously have a break in them at the levelling device 27.
  • the coaxial stream 3 is disposed on a belt 28 of the rod forming unit 19 with a continuous paper tape 29 interposed between it and the belt.
  • the paper tape 29 is fed together with the belt 28 along a customary rod forming beam 30 which, in known manner, progressively folds the belt 28 transversely around the tape 29 and the coaxial stream 3.
  • the opposite longitudinal ends of the tape 29 are joined to each other in known manner by a gluing device, not illustrated, to form a continuous coaxial rod, which is subsequently cut transversely into segments (not illustrated) by a cutting head (of known type not illustrated) to form cigarettes.
  • Figure 11 shows a cigarette making machine 1 comprising the first feed unit 4 for feeding the first smokable material, the second feed unit 6 for feeding the second smokable material and the suction conveyor 8.
  • the first unit 4 comprises an infeed hopper through which the smokable material is fed to a feed duct 31 comprising a conveying wheel 32.
  • the flow "F" of material is preferably directed upwards and vertical.
  • the feed duct divides into a first feed portion 33 configured to feed the first unit 4 and a second feed portion 34 configured to feed the second unit 6.
  • first smokable material and the second smokable material coincide.
  • first and second feed portions may be connected to respective feed ducts, each intended to feed a specific smokable material when the first and second smokable materials are different.
  • One or more conveying wheels 35 may be disposed along the first feed portion 33 and/or the second feed portion 34. Suitable suction and/or blowing means are provided along the feed duct 31 or along the first and second feed portions 33, 34.
  • the first smokable material suitable for forming the tubular portion 3b of the coaxial stream is fed at the bottom of the suction conveyor 8, in particular along the first stretch "P1" of the path "P" defined by the belt 9 of the suction conveyor 8.
  • the tobacco 5a coming out of the duct 7a collects on the lower branch of the belt 9, forming a layer 17a of tobacco whose thickness is adjusted by the levelling device 16, which removes the excess of the first smokable material as it passes between the first and the second stretch, as a function of the necessary quantity of tobacco, measured by the weight control system "W" which adjusts the height of the levelling device 16.
  • the second smokable material suitable for forming the core 3a of the coaxial stream 3 is fed at the top of the suction conveyor 8, along the second stretch "P2" of the path "P". More specifically, the tobacco 5b falling down along the duct 7b collects on the upper branch of the belt 9, forming a layer 17b of tobacco.
  • the width of the layer 17a is comparable to the circumference of the finished cigarette and the width of the layer 17b is comparable to the diameter of the core 3a.
  • the belt 9 is progressively deformed in such a way as to wrap it around the first smokable material to form the tubular portion 3b of the coaxial stream 3 around the core 3a. More specifically, the belt 9 is wound round itself along the feed direction "A" as far as the section 14 for forming the coaxial stream 3 and then opened out after the forming section.
  • the belt 9 is not subjected to suction, that is to say, it is not in communication with the chamber 10.
  • the coaxial stream 3 thus obtained is transferred between the upper unloading station 20 of the suction conveyor 8 and the upper loading station 21 of the rod forming unit 19.
  • the belt 22 of the suction conveyor 18 is wrapped around at least an upper portion of the coaxial stream, which is suspended along the transfer path and held in place by suction.
  • the coaxial stream 3 is kept in shape by the containment walls 26 associated with the suction transfer conveyor 18.
  • the excess of the first smokable material is removed by the levelling device 27 while the coaxial stream 3 is being transferred from the suction conveyor 8 to the rod forming unit 19.
  • the levelling device is adjustable in height by a total weight control unit, of known type and not illustrated, so that once the weight of the tobacco is adjusted by means of the levelling device 16, the two tobacco components are precisely measured.
  • the coaxial stream 3 received by the rod forming unit 19 advances along the rod forming beam 30 together with the paper tape 29 to form the continuous rod.
  • Figure 10 shows a possible variant embodiment comprising the first feed unit 4 for feeding the first smokable material, preferably in the form of shredded tobacco 5a, suitable for forming the tubular portion 3b, and a second feed unit 60 for feeding the second smokable material, suitable for forming the core 3a in the form of segments of one or more smokable materials, which in the example, are two different smokable materials.
  • the second unit 60 comprises a rotary element 61 configured to position the segments parallel to the second stretch "P2" of the path "P".
  • the rotary element 61 is fed by one or more loading hoppers 62 (two in the example of Figure 11 ) and by one or more sequences 63 of feed drums, preferably spacing adapters.
  • the second smokable material suitable for forming a core 3a of the coaxial stream 3 is fed by placing an aligned sequence of segments on the upper branch of the belt 9 to form a core 3a resting on the layer 17a of tobacco.
  • Figure 13 shows a possible variant embodiment comprising the first feed unit 4 for feeding the first smokable material, in the form of shredded tobacco 5a, suitable for partially forming the tubular portion 3b.
  • the first unit 4 comprises a substantially vertical duct 7a defining an ascending flow of particles of the first smokable material in the form of shredded tobacco 5a.
  • the belt 9, closes the top of the duct 7a so that the first stretch P1 is located in a lower portion 8a of the suction conveyor 8.
  • the numeral 9' denotes a further air permeable belt which is wound in a loop around a further chamber 10a communicating with a suction unit and which is movable in a direction of travel A' to define a closed path P'.
  • a stretch "X1" of the further belt 9' is superposed on the top of a stretch "X" of the belt 9.
  • the second unit 600 comprises feed means, not illustrated, configured to feed, between the belt 9 and the further belt 9', an elongate element "L" of the second smokable material suitable for forming the core 3a.
  • the reference label 7b denotes a substantially vertical duct defining a descending flow of particles of a third smokable material in the form of shredded tobacco, preferably the same as the first smokable material.
  • the further belt 9' closes the bottom of the duct 7b.
  • the suction transfer conveyor 18 is interposed between the suction conveyor 8 and the rod forming unit 19.
  • the suction transfer conveyor 18 is configured to transfer the coaxial stream 3 and comprises an air permeable belt which is wound in a loop around a chamber 23 in communication with a suction unit.
  • the further belt 9' itself forms the suction conveyor 18.
  • the suction conveyor 18 is configured to partly wrap an upper portion of the coaxial stream 3 and to keep it suspended and held by suction along the transfer path.
  • the first smokable material is fed below the suction conveyor 8 and the third smokable material, preferably the same as the first smokable material, is fed above the further belt 9'.
  • the elongate element "L" of the second smokable material is fed in such a way as to place it between the belt 9 and the further belt 9', in particular between the two stretches "X" and "X1 ".
  • the machine 1 illustrated in Figure 11 may be used in conjunction with the embodiment illustrated in Figure 13 .
  • the belt 9 is fed by the duct 7a, preferably curved, and the belt 9' is fed by the duct 7b, preferably curved.
  • the two ducts are fed with the same smokable material coming from the feed duct 31 and divided Into the first and second feed portions 33, 34.
  • the first and second feed portions 33, 34 may be positioned in a front plane of the machine 1.

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  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)
  • Wrapping Of Specific Fragile Articles (AREA)
EP17171321.7A 2016-05-18 2017-05-16 Unité et procédé de formation d'un flux coaxial dans une machine de fabrication de cigarettes coaxiales Active EP3245884B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITUA2016A003538A ITUA20163538A1 (it) 2016-05-18 2016-05-18 Unità e procedimento per la formazione di un cordone coassiale per una macchina confezionatrice di sigarette coassiali.

Publications (2)

Publication Number Publication Date
EP3245884A1 true EP3245884A1 (fr) 2017-11-22
EP3245884B1 EP3245884B1 (fr) 2018-12-05

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EP (1) EP3245884B1 (fr)
IT (1) ITUA20163538A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202100007073A1 (it) * 2021-03-24 2022-09-24 Gd Spa Macchina e metodo per la produzione di un cordone continuo dell’industria del tabacco

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4207906A (en) * 1977-12-30 1980-06-17 B.A.T. Company Limited Method of making a cigarette
US4632130A (en) * 1983-10-12 1986-12-30 Hauni-Werke Korber & Co. Kg. Method and apparatus for making a rod-like filler of smokable material
EP0503461A1 (fr) 1991-03-08 1992-09-16 British-American Tobacco (Germany) GmbH Cigarette coaxiale
GB2260887A (en) 1991-09-17 1993-05-05 Rothmans Int Tobacco Cigarettes with inserts
DE19518179A1 (de) * 1994-05-19 1995-11-23 Molins Plc Verfahren und Maschine zum Herstellen von Zigaretten
EP1004248A2 (fr) * 1998-11-25 2000-05-31 Hauni Maschinenbau AG Méthode et appareil pour fabriquer des cigarettes coaxiales
EP1449447A1 (fr) * 2001-11-05 2004-08-25 Japan Tobacco Inc. Cigarette a faible propagation de flamme
WO2007069091A2 (fr) 2005-12-12 2007-06-21 Philip Morris Products S.A. Article pour fumeur avec barre coaxiale de tabac
DE102013220757B3 (de) 2013-10-15 2015-01-15 Hauni Maschinenbau Ag Koaxialzigarettenherstellung

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4207906A (en) * 1977-12-30 1980-06-17 B.A.T. Company Limited Method of making a cigarette
US4632130A (en) * 1983-10-12 1986-12-30 Hauni-Werke Korber & Co. Kg. Method and apparatus for making a rod-like filler of smokable material
EP0503461A1 (fr) 1991-03-08 1992-09-16 British-American Tobacco (Germany) GmbH Cigarette coaxiale
GB2260887A (en) 1991-09-17 1993-05-05 Rothmans Int Tobacco Cigarettes with inserts
DE19518179A1 (de) * 1994-05-19 1995-11-23 Molins Plc Verfahren und Maschine zum Herstellen von Zigaretten
EP1004248A2 (fr) * 1998-11-25 2000-05-31 Hauni Maschinenbau AG Méthode et appareil pour fabriquer des cigarettes coaxiales
EP1449447A1 (fr) * 2001-11-05 2004-08-25 Japan Tobacco Inc. Cigarette a faible propagation de flamme
WO2007069091A2 (fr) 2005-12-12 2007-06-21 Philip Morris Products S.A. Article pour fumeur avec barre coaxiale de tabac
DE102013220757B3 (de) 2013-10-15 2015-01-15 Hauni Maschinenbau Ag Koaxialzigarettenherstellung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202100007073A1 (it) * 2021-03-24 2022-09-24 Gd Spa Macchina e metodo per la produzione di un cordone continuo dell’industria del tabacco

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Publication number Publication date
ITUA20163538A1 (it) 2017-11-18
EP3245884B1 (fr) 2018-12-05

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