EP2709474A1 - Dispositif de traitement de matériau filtrant pour produits de tabac - Google Patents

Dispositif de traitement de matériau filtrant pour produits de tabac

Info

Publication number
EP2709474A1
EP2709474A1 EP12726222.8A EP12726222A EP2709474A1 EP 2709474 A1 EP2709474 A1 EP 2709474A1 EP 12726222 A EP12726222 A EP 12726222A EP 2709474 A1 EP2709474 A1 EP 2709474A1
Authority
EP
European Patent Office
Prior art keywords
strip
tank
filter material
pins
screening means
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
EP12726222.8A
Other languages
German (de)
English (en)
Other versions
EP2709474B1 (fr
Inventor
Michele Ferioli
Massimo Sartoni
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.)
GD SpA
Original Assignee
GD SpA
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 GD SpA filed Critical GD SpA
Priority to PL12726222T priority Critical patent/PL2709474T3/pl
Publication of EP2709474A1 publication Critical patent/EP2709474A1/fr
Application granted granted Critical
Publication of EP2709474B1 publication Critical patent/EP2709474B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming
    • A24D3/0212—Applying additives to filter materials
    • A24D3/022—Applying additives to filter materials with liquid additives, e.g. application of plasticisers

Definitions

  • This invention relates to a device for the treatment of filter material for tobacco products, in particular in the context of a machine for making cigarette filters.
  • cigarette filters involve processing of a filter material consisting of a continuous strip, for example of cellulose acetate, also known by the term of "tow", obtained from a bale of compressed filter material.
  • the strip is made to advance along a predetermined path through processing stations where it is stretched lengthways, opened out transversely and then impregnated with plasticizing additives.
  • the step of impregnating the strip occurs at specific applicator devices which are designed to apply to the strip a flow of plasticizing material, in particular triacetin, which, at the ordinary operating temperature and pressure of these devices, is a liquid.
  • the strip is thus soaked in a flow of liquid droplets of predetermined size and quantity so that it absorbs the required quantity of triacetin.
  • forming means produce a continuous cylindrical cord of filter material which, at a wrapping station, is progressively wrapped in a continuous strip of wrapping material to form a continuous filter rod.
  • a rotary cutting device cuts the continuous rod into separate filter plugs.
  • the triacetin applicator device comprises a tank extending along and under the path followed by the strip.
  • the tank contains a certain quantity of triacetin fed from a reservoir through the agency of a pump.
  • the tank accommodates a rotary brush, partially immersed in the triacetin.
  • the brush rotates at a steady speed and thus produces a flow of liquid droplets which strike the strip of cellulose acetate from below.
  • nozzles are used to spray the strip from below as it is moved forward. The nozzles draw the triacetin directly from the tank.
  • the prior art devices can treat more than one strip at a time, generally two strips, which are usually fed along two parallel paths in the same machine.
  • each strip receives the triacetin from respective brushes or nozzles.
  • the lid over the tank has a top which is inclined downwardly from upstream to downstream with reference to the direction of strip feed.
  • the top of the lid is provided with slight ribbing, or with a ridge defined by a low protrusion, located centrally, that is to say, along the middle of the tank, so that the triacetin that collects on the inside surface of the lid is conveyed towards a recycling zone in a lengthwise direction, that is to say, in the direction of strip feed.
  • this invention has for an aim to provide a device for the treatment of filter material for tobacco products which is free of the disadvantages described above with reference to the prior art.
  • - Figure 1 schematically shows a machine for making filters for tobacco products comprising a device according to the invention
  • - Figure 2 is a schematic side view of a first variant embodiment of the device according to the invention.
  • - Figure 3 is a schematic side view of a second variant embodiment of the device according to the invention.
  • - Figure 4 is a perspective view, with some parts cut away in order to better illustrate others, of a first embodiment of the device
  • - Figure 5 is a perspective view, with some parts cut away in order to better illustrate others, of a second embodiment of the device
  • - Figure 6 is a perspective view, with some parts cut away in order to better illustrate others, of a third embodiment of the device.
  • - Figure 7 is a perspective view, with some parts cut away in order to better illustrate others, of a fourth embodiment of the device.
  • - Figure 8 is a perspective view of a detail of the device according to the invention.
  • - Figure 9 is a perspective view of a second variant of the detail of Figure 8;
  • - Figure 10 is a perspective view of a third variant of the detail of Figure 8;
  • - Figure 11 shows a step of making the detail of Figure 8;
  • - Figure 14 is a perspective view, with some parts cut away in order to better illustrate others, of a second detail of the device according to the invention.
  • the numeral 1 denotes in its entirety a device for the treatment of filter material for tobacco products according to this invention.
  • the device 1 is used in machines 2 substantially of the type illustrated in Figure 1, used for making filters for tobacco products, in particular cigarettes.
  • These machines 2 comprise a reservoir 4 of filter material containing two masses 6 of filter material, only one of which is illustrated in Figure 1. Respective ribbons 8 are unwound from the masses 6 and fed by guide devices of known type to a station 10 for processing the filter material.
  • the station 10 for processing the filter material comprises at least one blower device 12 of known type which transversely opens out the ribbons 8 and transforms them into continuous webs 14 of predetermined width.
  • the processing station 10 comprises three blower devices 12, located along filter processing and forming lines 16 as illustrated in Figure 1.
  • the processing station 10 also comprises a device 1 for treating the filter material according to the invention, located downstream of the blower devices 12 and receiving the continuous webs 14 in order to plasticize the continuous webs 14 by adding a plasticizing fluid to them.
  • the continuous webs 14 are fed towards a roller conveying device 18 designed to receive the continuous webs 14 and to convey them towards respective webs or tapes 22 of previously glued paper.
  • a roller conveying device 18 designed to receive the continuous webs 14 and to convey them towards respective webs or tapes 22 of previously glued paper.
  • the webs 14 are gathered together into cords by respective conical conveyors which give them, in known manner, a substantially cylindrical shape.
  • the cords obtained from the webs 14 are parallel to each other and are wrapped in the tapes 22 of pre-glued paper to obtain respective parallel rods 24 of filter material.
  • the rods 24 thus obtained are fed into a quality check device 26, which checks the rods 24, and then to a cutting head 28, which cuts the rods 24 to obtain respective successions of filter plugs, not illustrated.
  • the device 1 comprises a tank 30, having a base 32 and an upper opening 34 and designed to contain a plasticizing fluid product, in particular triacetin.
  • At least one continuous strip 36 defined by the continuous web 14 of filter material is fed along a respective filter processing and forming line 16.
  • the strip 36 is made to advance at the upper opening 34 of the tank 30.
  • the strip 36 is made to advance above the upper opening 34 of the tank 30.
  • the device 1 also comprises means 38 for generating a flow of a plasticizing fluid directed towards the continuous strip 36 of filter material.
  • the flow generating means 38 comprise a rotary brush 40 provided with bristles 42.
  • the brush 40 is located inside the containment tank 30 and is partially immersed in the triacetin.
  • the bristles 42 collect triacetin and, thanks to a contact element not illustrated which the bristles 42 partially interfere with as they turn, spray triacetin at the continuous strip 36.
  • the generating means 38 comprise a battery of nozzles 44 connected to the containment tank 30. Through the agency of a pump not illustrated, the triacetin is sprayed, through the battery of nozzles 44, at the continuous strip 36 of filter material.
  • the device 1 comprises screening means 46 for the upper opening 34 of the tank 30.
  • the screening means 46 form a window 48 through which the strip 36 is exposed to the flow of plasticizing fluid.
  • the window 48 has fixed dimensions which are less than the dimensions of the upper opening 34 of the tank 30. Further, the width of the window 48 is substantially equal to the width of the strip 36.
  • the width of the window 48 is slightly greater than the width of the strip 36 so as to guarantee that the triacetin is applied correctly, in particular on the lateral edges 110 of the strip 36, should the strip 36 become misaligned as it moves forward.
  • the screening means 46 constitute a changeover part, that is to say, it can be substituted according to the width of the strip 36 of filter material to be treated.
  • the screening means 46 can be embodied in different ways, all falling within the scope of the invention.
  • the screening means 46 are formed by a plurality of elements 50 which are separate from each other.
  • Each element 50 comprises respective upper walls 52 which are substantially coplanar.
  • the walls 52 are substantially parallel, or slightly inclined, relative to a plane in which the strip 36 lies as it moves forward.
  • the screening means 46 are formed by a plurality of elements 50 which are connected to each other.
  • each element 50 comprises respective upper walls 52 which are substantially coplanar.
  • the elements 50 have the form of a flat plate 54.
  • the element 50 is made from a substantially rectangular flat plate 54 which is folded at the ends of it 56 along respective fold lines 58.
  • the element 50 After being folded, the element 50 comprises the aforementioned upper wall 52 and two side walls 60 formed by the folded ends 56.
  • the screening means 46 comprise a first side element 62, a second side element 64 and a third element 66 located at a substantially central position of the tank 30.
  • respective windows 48 for exposing each strip 36 to the flow of plasticizing fluid are formed between the first element 62 and the third element 66 and between the second element 64 and the third element 66.
  • a first window 68 for exposing a first continuous strip 36a is formed between the first element 62 and the third element 66
  • a second window 70 for exposing a second continuous strip 36b is formed between the second element 64 and the third element 66.
  • each window 68, 70 may be considered as the plane portion extending between two adjacent elements 50 and relative to which the upper walls 52 of the elements 50 are co-planar with each other.
  • the screening means 46 have the form of a single flat plate 54 having at least one unbroken aperture 72 cut into it.
  • the flat plate 54 has an unbroken aperture 72 for each of the continuous strips 36.
  • each unbroken aperture 72 forms an opening 74 which in turn forms the window 48 for exposing the respective strip 36 to the flow of plasticizing fluid.
  • the apertures 72 are substantially rectangular in shape and equal in size.
  • the elements 50 can be identified as portions of the flat plate 54 since they are connected to each other.
  • a first side portion 76, a second side portion 78 and a third central portion 80 can be identified on the plate 54, these portions corresponding to the first side element 62, the second side element 64 and the third central element 66, respectively.
  • the side walls 60 are here formed by two longitudinal bands 82 of the flat plate 54, defined by the respective fold lines 58, which are folded to form, as just stated, the side walls 60 of the elements 50.
  • the side walls 60 are in this case joined by the material of the plate 54.
  • Each element 50 has precise, preset dimensions. Thus, once the elements 50 are fitted on the containment tank 30, each exposure window 48 has precise dimensions.
  • the dimensions of the window 48 are fixed and not adjustable.
  • the screening means 46 are formed by elements 50 which are connected to each other and hence obtained from a single plate 54, it is instead the unbroken aperture 72 that is suitably dimensioned according to the width of the continuous strip 36 to be treated.
  • the dimensions of the window 48 are fixed and may not therefore be varied.
  • the device 1 comprises a central crossbar 86 which supports the rotary brush 40.
  • the crossbar 86 supports the brush 40 by means of a protrusion 88, which has a hole 90 through which the brush 40 itself passes ( Figures 6 and 7).
  • Figure 6 shows a third embodiment of the screening means 46, which comprise the first side element 62 and the second side element 64, and centrally, the third central element 66 and a fourth central element 92.
  • the third element 66 is located between the first strip 36a and the central crossbar 86, whilst the fourth element 92 is located between the central crossbar 86 and the second strip 36b.
  • Figure 7 shows a fourth embodiment of the screening means 46 where each exposure window 48 is formed by an unbroken aperture 72 in the flat plate 54.
  • the screening means 46 comprise the first side element 62 and the third central element 66 which are connected to each other by the respective side walls 60, and the second side element 64 and the fourth central element 92 which are also connected to each other by the respective side walls 60.
  • the screening means are embodied by two flat plates 54, each having a single unbroken aperture 72 and corresponding to only two elements 50 connected to each other.
  • the containment tank 30 also comprises lower supporting means 94 for the screening means 46.
  • the supporting means 94 interact with the side walls 60 of the elements 50 of the screening means 46.
  • the supporting means 94 are defined by a duct 96, located inside the containment tank 30 and comprising a first side wall 98 and a second side wall 100.
  • the flow of plasticizing fluid runs inside the duct 96 in the direction of the continuous strip 36 of filter material moving forward.
  • the first side wall 98 and the second side wall 100 are preferably inclined so as to better accompany the flow of plasticizing fluid.
  • the inclined walls 98, 100 also make it possible to delimit the fluid flow so as to better direct it towards each strip 36 as the latter moves forward.
  • the duct 96 has a bottom opening 102 and a top opening 104.
  • the cross section of the duct 96 diverges from the bottom opening 102 to the top opening 104.
  • the bottom opening 102 faces the means 38 for generating the flow of plasticizing fluid, whilst the top opening 104 faces the strip 36 of filter material being moved forward.
  • the screening means 46 are fitted inside the duct 96.
  • each element 50 is shaped in such a way as to adapt to the inclination of the walls 98, 100 of the duct 96.
  • the elements 50, and hence the screening means 46 as a whole are supported by the side walls 98,100 of the duct 96.
  • each element 50, supported by the walls 98,100 of the duct 96 reaches a stable position inside the duct 96 itself.
  • the element 50 reach this position under each continuous strip 36.
  • the lower supporting means 94 are embodied by the side walls 60 of the elements 50 of the screening means 46 and by the inclined side walls 98,100 of the duct 96.
  • the containment tank 30 comprises abutments on the side walls of the tank 30 itself or on the side walls 98,100 of the duct 96.
  • the side walls 60 of the elements 50 of the screening means 46 interact for example with the abutments by resting thereon.
  • the elements 50 reach a stable position inside the duct 96, thus guaranteeing optimum screening of the flow of plasticizing fluid.
  • An advantageous aspect of these variant embodiments is the ease of positioning and fitting the elements 50 and hence the screening means 46.
  • the device 1 also comprises means 106 for aligning the advancing strip 36 with the exposure window 48 ( Figures 4-7).
  • the aligning means 106 comprise a plurality of pins 108 which are substantially perpendicular to the plane in which the strip 36a,36b lies.
  • the alignment means 106 are embodied by a plurality of pins 108 located at the infeed of the device 1.
  • the alignment means 106 are also further embodied by a plurality of pins
  • the purpose of the pins 108 is to prevent misalignment of the strip 36 as it advances. As already stated, such misalignment might prevent the strip 36 from correctly intercepting the flow of plasticizing fluid, resulting in zones without plasticizing fluid on the strip 36 itself.
  • Each strip 36 to be treated is kept aligned by at least one pair of pins 108 which come into contact with the lateral edges 110 of the strip 36, thereby preventing misalignment.
  • each strip 36 is kept aligned by contact of its lateral edges 110 with a first pair 112 of pins 108.
  • each strip 36 is kept aligned by contact of its lateral edges 110 with a second pair 114 of pins 108.
  • the pins 108 are movable along a direction transversal to the direction D of strip 36 feed. This allows alignment with the exposure window 48 to be adjusted precisely according to the size of the strip 36.
  • the pins 108 are partly inserted in a respective guide 116 and, in the event of changeover to a different size strip 36, the pins 108 of each pair 112, 114 are moved along the guide 116 to adjust their spacing according to the width of the strip 36 to be treated.
  • the pins 108 are substantially cylindrical in shape. Since the pins 108 come into contact with the lateral edges 110 of the strip 36, the pins 108 are made of a material which has a low friction coefficient so as to prevent damaging the strip 36 by rubbing against it as it moves forward. Further, the pins 108 may be mounted so they can rotate freely in the respective guides 116, in such a way that their rotational movement accompanies the forward movement of the strip 36.
  • the device 1 also comprises a lid 118 for closing the containment tank 30.
  • the lid 118 is located above the tank 30 and between the first pair 112 of pins 108 and the second 114.
  • the containment tank 30 comprises a respective supporting ledge 120 for the lid 118, running parallel to the direction D of feed of the strips 36.
  • the ledge 120 keeps the lid 118 at a certain distance from the plane in which the strip 36 lies, so as to allow the strip 36 itself to slide freely.
  • the lid 118 comprises at least one run-off element 122 for draining off excess plasticizing fluid, if necessary.
  • the lid 118 also has an inclined top surface 124 which makes the cross section of the lid 118 convergent along the direction D of strip 36 feed, so as to facilitate run-off of excess fluid.
  • the lid 118 is provided on its inside surface 118a with the run-off element 122, which prevents the fluid from being supplied in excess.
  • the run-off element 122 comprises at least one rib or projection 126, lying in a plane parallel to the direction D of strip 36 feed and able to recover the excess fluid droplets that have been deposited on the inside surface 118a of the lid 118 and to direct them towards a fluid recycling zone Z.
  • the lid 118 is provided with a plurality of parallel ribs or projections 126 which can optimally direct towards the recycling zone Z the excess triacetin which has been deposited on the inside surface of the lid.
  • the run-off element 122 might otherwise be embodied by a plurality of grooves 128 formed on the inside surface 118a of the lid 118 and also able to collect the fluid droplets and direct them towards the recycling zone Z.
  • the recycling zone Z is located at the front of the containment tank 30, near the front pins 108.
  • the tank 30 has at least one drainage surface 130, which is inclined in the direction of the means 38 for generating the flow of plasticizing fluid.
  • each strip 36 is treated at a time, it is preferable to associate each strip 36 with respective drainage surfaces 130 for the excess fluid to be recycled, as illustrated in Figures 4 to 7.
  • the drainage surfaces 130 receive the excess droplets from the run-off element 122 and direct them back into the tank 30 in the direction of the fluid flow generating means 38.
  • the invention described above provides a device for the treatment of filter material for tobacco products which is able to process strips of filter material of different sizes.
  • the invention guarantees effective protection for the strips and at the same time guarantees that the plasticizing fluid is added to the filter material in the correct quantity.
  • the invention allows changeover time to be reduced, thanks to the ease with which the screening means can be substituted.

Landscapes

  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

L'invention concerne un dispositif conçu pour le traitement de matériau filtrant pour produits de tabac, qui comprend un réservoir de confinement (30) de liquide plastification, en particulier la triacétine; à l'intérieur du réservoir de confinement (30), des moyens permettent de générer un flux de liquide de plastification et orientent le flux vers au moins une bande continue (36) de matériau filtrant qui avance le long d'une chaîne de traitement respective au niveau de l'ouverture supérieure (34) du réservoir (30); ledit réservoir (30) est également équipé d'un ou de plusieurs écrans (46) pour ladite ouverture supérieure (34), qui sont remplaçables pour un changement rapide et qui forment une fenêtre (48) permettant d'exposer la bande (36) au flux du liquide de plastification; ladite fenêtre (48) a des dimensions fixes qui sont inférieures à celles de l'ouverture supérieure (34) du réservoir (30) et une largeur sensiblement égale à celle de la bande (36).
EP12726222.8A 2011-05-16 2012-05-15 Dispositif de traitement de matériau filtrant pour produits de tabac Not-in-force EP2709474B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12726222T PL2709474T3 (pl) 2011-05-16 2012-05-15 Urządzenie do obróbki materiału filtrującego do wyrobów tytoniowych

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000272A ITBO20110272A1 (it) 2011-05-16 2011-05-16 Dipositivo per il trattamento di materiale filtrante per articoli da fumo.
PCT/IB2012/052432 WO2012156911A1 (fr) 2011-05-16 2012-05-15 Dispositif de traitement de matériau filtrant pour produits de tabac

Publications (2)

Publication Number Publication Date
EP2709474A1 true EP2709474A1 (fr) 2014-03-26
EP2709474B1 EP2709474B1 (fr) 2018-01-24

Family

ID=44554427

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12726222.8A Not-in-force EP2709474B1 (fr) 2011-05-16 2012-05-15 Dispositif de traitement de matériau filtrant pour produits de tabac

Country Status (7)

Country Link
EP (1) EP2709474B1 (fr)
JP (1) JP6105565B2 (fr)
CN (1) CN103648309B (fr)
IT (1) ITBO20110272A1 (fr)
PL (1) PL2709474T3 (fr)
RU (1) RU2606079C2 (fr)
WO (1) WO2012156911A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3011847B1 (fr) 2014-10-24 2017-09-13 G.D Societa' per Azioni Unité et procédé d'application d'un additif sur une machine de fabrication de filtre de cigarettes
EP4393325A1 (fr) 2022-12-13 2024-07-03 G.D S.p.A. Machine pour introduire des composants discrets dans un noyau continu de l'industrie du tabac

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU5293879A (en) * 1978-12-04 1982-05-13 Celanese Corporation Applying liquid to filamentary material
US4367249A (en) * 1980-04-17 1983-01-04 Celanese Corporation Process and apparatus for controlling distributing and monitoring liquids
DE10354924B4 (de) * 2003-11-25 2024-01-18 Körber Technologies Gmbh Vorrichtung zum Aufbereiten von Filtertowmaterial sowie Vorrichtung zur Herstellung von Filtern
DE102005038728B3 (de) * 2005-08-15 2007-03-29 Hauni Maschinenbau Ag Verfahren und Einrichtung zur Zufuhr eines Zusatzstoffes auf eine Filtermaterialbahn
DE102006011587B4 (de) * 2006-03-10 2008-04-03 Hauni Maschinenbau Ag Aufbereitung eines Filtermaterialstreifens der Tabak verarbeitenden Industrie
ITBO20060301A1 (it) * 2006-04-21 2006-07-21 Gd Spa Dispositivo per il trattenimento di materiale filtrante per articoli da fumo
ITBO20060601A1 (it) * 2006-08-11 2006-11-10 Gd Spa Dispositivo per il trattamento di materiale filtrante per articoli da fumo.
ITBO20060875A1 (it) * 2006-12-22 2007-03-23 Gd Spa Macchina confezionatrice di filtri per articoli da fumo

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2012156911A1 *

Also Published As

Publication number Publication date
JP6105565B2 (ja) 2017-03-29
CN103648309B (zh) 2015-10-07
PL2709474T3 (pl) 2018-07-31
ITBO20110272A1 (it) 2012-11-17
RU2606079C2 (ru) 2017-01-10
WO2012156911A1 (fr) 2012-11-22
JP2014514931A (ja) 2014-06-26
CN103648309A (zh) 2014-03-19
RU2013150023A (ru) 2015-06-27
EP2709474B1 (fr) 2018-01-24

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