EP1917870A2 - Machine de fabrication de filtres pour produits de tabac - Google Patents

Machine de fabrication de filtres pour produits de tabac Download PDF

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Publication number
EP1917870A2
EP1917870A2 EP07119418A EP07119418A EP1917870A2 EP 1917870 A2 EP1917870 A2 EP 1917870A2 EP 07119418 A EP07119418 A EP 07119418A EP 07119418 A EP07119418 A EP 07119418A EP 1917870 A2 EP1917870 A2 EP 1917870A2
Authority
EP
European Patent Office
Prior art keywords
flow
machine
duct
section
bundle
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
EP07119418A
Other languages
German (de)
English (en)
Other versions
EP1917870A3 (fr
EP1917870B1 (fr
Inventor
Marco Righetti
Armando Turrini
Leonardo Balletti
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
Publication of EP1917870A2 publication Critical patent/EP1917870A2/fr
Publication of EP1917870A3 publication Critical patent/EP1917870A3/fr
Application granted granted Critical
Publication of EP1917870B1 publication Critical patent/EP1917870B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • A24D3/0229—Filter rod forming processes
    • A24D3/0233—Filter rod forming processes by means of a garniture
    • 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

Definitions

  • the present invention relates to a machine for manufacturing filters applicable to tobacco products, and in particular to cigarettes.
  • the manufacture of cigarette filters generally involves processing a continuous stream of filter material, such as cellulose acetate, which is drawn from a compacted bale.
  • the continuous stream of filter material consists in a high number (thousands) of continuous filaments.
  • Prior art manufacturing methods include a step of feeding the stream along a predetermined path through processing stations, where it is first stretched lengthwise and crosswise, and then wetted with chemical additives, typically triacetin.
  • the filter material is gathered into a continuous rope or bundle of cylindrical appearance by respective shaping means.
  • the shaping means appear as a funnel-like duct into which the continuous stream is introduced, carried forward by a flow of air, its transverse dimension reducing gradually to the point that the filaments are drawn into a rope, or bundle, presenting a cross section substantially the same as that of a cigarette.
  • the bundle passes through a further processing station where it is wrapped by degrees in a continuous strip of paper material, forming a continuous filter rod that will then be divided up into single plugs by a rotary cutter device.
  • the annular passage is inclined relative to the feed direction of the continuous bundle, in such a manner that the pressurized air admitted via the passage will enter the duct and invest the outer surface of the bundle of filter material, assisting its progress toward the outlet of the duct.
  • the air enters the annular passage at one or more localized points, with the result that the flow investing the continuous bundle as it forms internally of the duct is not homogeneous.
  • the bundle is subject to asymmetrical thrust components that will translate into poor production stability, that is to say inconsistencies in the filtration properties presented by a given continuous bundle.
  • the object of the present invention is primarily to provide a machine for manufacturing filters applicable to tobacco products, such as will be unaffected by the drawback mentioned above.
  • the object of the invention is to provide a machine manufacturing filters for tobacco products that will convey the continuous bundle of filter material in a uniform manner.
  • a further object of the present invention is to provide a machine manufacturing filters for tobacco products, having the attributes needed to ensure good production stability.
  • numeral 1 denotes a machine for manufacturing filters applicable to tobacco products, embodied in accordance with the present invention.
  • the machine 1 comprises feed means 2 supplying a continuous stream 100 of filter material, a duct 3 along which the continuous stream 100 of filter material is directed and formed into a cylindrical bundle 101 (illustrated partially in figure 3), a nozzle 4 at the end of the duct 3, from which the bundle emerges as a continuous rod 102, a garniture section 5 along which the continuous rod 102 is enveloped in a strip 6 of paper plugwrap material, and means 7 by which the wrapped rod is cut into single filter plugs, also feed means 8, illustrated in figures 2, 3 and 4, supplying a flow of air by which the bundle 101 forming within the duct 3 is subjected to an axial pushing force.
  • the feed means 8 comprise an inlet port 9 admitting the flow of air, associated with a fitting 10 for connection to a compressed air supply line (not illustrated), and an annular passage 11 located between the air inlet 9 and the bore of the duct 3.
  • the annular passage affords an air gap of which the flow section is significantly small compared to the length of the selfsame gap as measured along the flow-through direction.
  • Air is conveyed from the inlet port 9 toward the duct 3 in a direction substantially orthogonal, or ideally inclined, relative to the feed direction X followed by the bundle 101 along the duct 3.
  • the air inlet port 9 is not of annular geometry like the passage 11, but located at a single point on the periphery of the duct 3, or in any event a limited number of points (see figures 2 to 4).
  • the feed means 8 supplying the flow of air comprise equalizing means 12, preferably of a type designed to induce a pressure drop, located between the inlet port 9 and the annular passage 11 and serving to ensure the supply of a uniform flow of air into the passage 11.
  • the continuous bundle 101 forming within the duct 3 is invested by a homogeneous flow of air such as will assist its progress along the selfsame duct 3, thus favouring a good stability of production (with filtration properties maintained constant along the full length of the bundle).
  • the equalizing means 12 comprise an expansion chamber 13 located between the inlet port 9 admitting the flow of compressed air, and the annular passage 11.
  • the expansion chamber 13 is annular in shape and fully encircles the innermost part of the duct 3, that is to say the tube 14 internally of which the continuous bundle 101 advances.
  • the expansion chamber 13 is also connected to a distribution chamber 15, presenting a wall 16, by way of which the flow of air is directed into the annular passage 11.
  • the compressed air inlet port 9 communicates directly with the expansion chamber 13, whilst the distribution chamber 15 is located downstream of the expansion chamber 13, presenting an annular configuration and encircling the tube 14 in like manner to the upstream chamber 13.
  • the holes 17 serve to induce further pressure losses in the flow of air, the effect of which being to equalize the distribution of both the velocity component and the pressure component in the flow directed through the annular passage 11 and onto the continuous bundle 101.
  • the annular passage 11 is inclined in relation to the feed direction X followed by the bundle 101 along the duct 3, and in particular, inclined at an angle such that the flow of air will be directed as tangentially as possible onto the bundle 101.
  • the annular passage 11 is created between two half sections 18 and 19 making up the duct 3.
  • the first half-section 18 of the duct 3 presents a cavity 20 establishing a first segment of the aforementioned tube 14 through which the bundle 101 is directed.
  • the cavity 20 is of substantially convergent funnel-like geometry, and thus easily associated with the feed means 2 from which the continuous stream 100 of filter material is received.
  • a cavity 20 of the type in question could be embodied as a succession of rectilinear conical duct portions joined suitably one to the next, or alternatively, with a continuous profile of which the geometry appears substantially parabolic or comparable to cubic splines or splines of higher order.
  • the second half-section 19 of the duct 3 is associated stably with the first half-section 18 and translatable relative thereto along an axis parallel to the feed direction X followed by the cylindrical bundle 101 forming in the duct, as will be made clearer in due course.
  • the first and second half-sections 18 and 19 present respective annular surfaces denoted 21 and 22, breasted one with another and inclined relative to the aforementioned feed direction X of bundle 101.
  • the two annular surfaces 21 and 22 in question combine operationally to delimit a main portion of the passage 11.
  • the distance separating the two inclined annular surfaces 21 and 22 can be adjusted by translating the second half-section 19 relative to the first half-section 18, so as to widen or narrow the flow section afforded by the passage 11: see figure 3, for example, where the flow section of the passage 11 is at minimum, or figure 4, where the flow section is at maximum.
  • the second half-section 19 is aligned and associated coaxially with the first half-section 18 by way of suitable coupling means, which in the preferred embodiment illustrated are embodied as respective screw threads 23.
  • this same second half-section 19 can be distanced from the first half-section 18, and the flow section of the passage 11 widened.
  • the flow equalizing means 12, and more precisely the expansion chamber 13 and the distribution chamber 15, are associated permanently with the first half-section 18 and therefore remain stationary during the movement by which the flow section of the annular passage 11 is adjusted.
  • the second half-section 19 is located downstream of the first half-section 18, as already mentioned, and coupled directly to the nozzle 4 from which the bundle 101 emerges.
  • the first half-section 18 presents a sleeve 24 in which the second half-section 19 is insertable and on which an aforementioned coupling thread 23 is formed.
  • the outer surface of the sleeve 24 presents a set screw 25 passing through the sleeve 24 wall, by which the second half-section 19 is engaged and locked in the selected angular position.
  • the terminal portion of the annular passage 11 is incorporated directly into a portion of the aforementioned tube 14 coinciding with a substantially cylindrical cavity 27 afforded by the second half-section 19.
  • the portion of the tube 14 afforded by the second half-section 19 presents a plurality of grooves 28 extending parallel to the feed direction X of the bundle 101, also parallel one with another and distributed circumferentially around the tube 14.
  • the grooves 28 will ensure that the flow of air continues to invest the entire surface of the bundle 101 and thus cause the material to advance correctly.
  • the grooves 28 also function actively as flow guides.
  • the equalizing means ensure that the pressure and velocity of the air flowing into the annular passage and destined to invest the bundle gathering in the duct will be, to all intents and purposes, uniformly distributed around the entire annular periphery of the passage inlet section.
  • the function of the expansion chamber and the distribution chamber is to handle the flow of air from the inlet port to the annular passage in such a way that it will be rendered uniform and without appreciable variations or imbalances in pressure and velocity.
  • any asymmetrical distribution of pressure and velocity components in the air flow, considered in relation to the inlet section of the annular passage, is significantly attenuated, so that the flow of air will present substantially the same pressure and velocity characteristics when passing both through the portion of the passage located in close proximity to the inlet port and through the portion of the passage located farthest from the inlet port.

Landscapes

  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)
EP20070119418 2006-10-31 2007-10-26 Machine de fabrication de filtres pour produits à base de tabac Not-in-force EP1917870B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITBO20060749 ITBO20060749A1 (it) 2006-10-31 2006-10-31 Macchina confezionatrice di filtri per articoli da fumo

Publications (3)

Publication Number Publication Date
EP1917870A2 true EP1917870A2 (fr) 2008-05-07
EP1917870A3 EP1917870A3 (fr) 2009-03-11
EP1917870B1 EP1917870B1 (fr) 2011-01-26

Family

ID=39099854

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070119418 Not-in-force EP1917870B1 (fr) 2006-10-31 2007-10-26 Machine de fabrication de filtres pour produits à base de tabac

Country Status (4)

Country Link
EP (1) EP1917870B1 (fr)
CN (1) CN101171977B (fr)
DE (1) DE602007012189D1 (fr)
IT (1) ITBO20060749A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010108740A1 (fr) * 2009-03-26 2010-09-30 British American Tobacco (Investments) Limited Buse de guidage pour appareil à fabriquer du filtre en barre
ITBO20100637A1 (it) * 2010-10-22 2012-04-23 Gd Spa Macchina per la produzione di filtri per sigarette.
ITBO20100693A1 (it) * 2010-11-19 2012-05-20 Montrade S R L Metodo e dispositivo per l'avanzamento pneumatico di un cordone continuo di materiale filtrante per articoli da fumo
DE202012003924U1 (de) 2011-04-18 2012-06-14 G.D Società per Azioni Kompaktier- oder Verdichtergruppe für eine Maschine zur Produktion von Zigarettenfiltern
CN103783665A (zh) * 2014-03-01 2014-05-14 南通烟滤嘴有限责任公司 两级风力捕丝器
ITBO20130314A1 (it) * 2013-06-21 2014-12-22 Gd Spa Macchina per la produzione di filtri per sigarette
EP3473111B1 (fr) 2017-10-18 2022-12-07 G.D S.p.A. Unité de sertissage

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102715653B (zh) * 2012-07-03 2013-11-13 云南玉溪卷烟厂滤嘴棒分厂 滤棒成型机导丝喇叭咀
PL223115B1 (pl) * 2013-02-15 2016-10-31 Int Tobacco Machinery Poland Spółka Z Ograniczoną Odpowiedzialnością Sposób, mechanizm i urządzenie do chwilowego kompresowania materiału filtracyjnego
DE102014011542A1 (de) 2014-08-08 2016-02-11 Hauni Maschinenbau Ag Transportdüse für eine Vorrichtung zur Herstellung von Filterstäben für die Tabakverarbeitende Industrie und Vorrichtung zur Herstellung von Filterstäben für die Tabakverarbeitende Industrie
GB201715922D0 (en) * 2017-09-29 2017-11-15 British American Tobacco Investments Ltd A filter unit for a smoking article

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0546519A2 (fr) 1991-12-09 1993-06-16 Mitsubishi Rayon Co., Ltd Jet d'air pour la production de bouchons filtrants pour cigarettes
EP0594054A2 (fr) 1992-10-21 1994-04-27 Hoechst Celanese Corporation Adaptateur pour transport à jet d'air

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3050430A (en) * 1959-11-12 1962-08-21 Eastman Kodak Co Jet and method of filter manufacture
US3173188A (en) * 1961-11-03 1965-03-16 Eastman Kodak Co Tobacco smoke filter formation

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0546519A2 (fr) 1991-12-09 1993-06-16 Mitsubishi Rayon Co., Ltd Jet d'air pour la production de bouchons filtrants pour cigarettes
EP0594054A2 (fr) 1992-10-21 1994-04-27 Hoechst Celanese Corporation Adaptateur pour transport à jet d'air

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010108740A1 (fr) * 2009-03-26 2010-09-30 British American Tobacco (Investments) Limited Buse de guidage pour appareil à fabriquer du filtre en barre
US8652020B2 (en) 2009-03-26 2014-02-18 British Amercian Tobacco (Investments) Limited Guide nozzle for use with filter rod manufacturing apparatus
ITBO20100637A1 (it) * 2010-10-22 2012-04-23 Gd Spa Macchina per la produzione di filtri per sigarette.
ITBO20100693A1 (it) * 2010-11-19 2012-05-20 Montrade S R L Metodo e dispositivo per l'avanzamento pneumatico di un cordone continuo di materiale filtrante per articoli da fumo
DE202012003924U1 (de) 2011-04-18 2012-06-14 G.D Società per Azioni Kompaktier- oder Verdichtergruppe für eine Maschine zur Produktion von Zigarettenfiltern
ITBO20110206A1 (it) * 2011-04-18 2012-10-19 Gd Spa Gruppo compattatore per una macchina per la produzione di filtri per sigarette.
ITBO20130314A1 (it) * 2013-06-21 2014-12-22 Gd Spa Macchina per la produzione di filtri per sigarette
EP2818061A1 (fr) * 2013-06-21 2014-12-31 G.D Societa' Per Azioni Machine pour fabrication de filtre de cigarette
CN103783665A (zh) * 2014-03-01 2014-05-14 南通烟滤嘴有限责任公司 两级风力捕丝器
EP3473111B1 (fr) 2017-10-18 2022-12-07 G.D S.p.A. Unité de sertissage

Also Published As

Publication number Publication date
DE602007012189D1 (de) 2011-03-10
EP1917870A3 (fr) 2009-03-11
CN101171977B (zh) 2011-08-10
ITBO20060749A1 (it) 2007-01-30
CN101171977A (zh) 2008-05-07
EP1917870B1 (fr) 2011-01-26

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