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EP1525809A1 - A unit and a method for forming a continuous cigarette rod in a cigarette maker - Google Patents

A unit and a method for forming a continuous cigarette rod in a cigarette maker Download PDF

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Publication number
EP1525809A1
EP1525809A1 EP04425765A EP04425765A EP1525809A1 EP 1525809 A1 EP1525809 A1 EP 1525809A1 EP 04425765 A EP04425765 A EP 04425765A EP 04425765 A EP04425765 A EP 04425765A EP 1525809 A1 EP1525809 A1 EP 1525809A1
Authority
EP
European Patent Office
Prior art keywords
stream
unit
trimming device
predetermined
trimming
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.)
Withdrawn
Application number
EP04425765A
Other languages
German (de)
English (en)
French (fr)
Inventor
Davide Dall'osso
Massimo Sartoni
Fiorenzo Draghetti
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 EP1525809A1 publication Critical patent/EP1525809A1/en
Withdrawn legal-status Critical Current

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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
    • A24C5/1842—Trimming devices
    • 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
    • A24C5/1814—Forming the rod containing parts of different densities, e.g. dense ends

Definitions

  • the present invention relates to a unit and to a method for forming a continuous cigarette rod in a cigarette making machine, whether equipped with a single processing line or with two such lines.
  • a conventional cigarette maker of the type that operates by forming a continuous cigarette rod will generally comprise a vertical riser duct fed at the bottom end with a continuous flow of tobacco fibres and communicating at the top end with an aspirating conveyor belt on which a continuous stream of loose tobacco filler is formed.
  • the stream of tobacco filler is carried by the aspirating belt along a predetermined path toward a feed unit supplying a continuous strip of paper which is directed onto and along a forming block and wrapped progressively around the stream of tobacco to generate a continuous cigarette rod.
  • the cigarette maker is equipped with suitable compression means, positioned along the aforementioned path, of which the function is to densify and compact predetermined portions of the tobacco stream that will ultimately form the ends of the cigarettes.
  • the tobacco is attracted by a bottom branch of the aspirating conveyor belt and gathered into a stream that does not present a uniform thickness, but will be of thickness greater at any given point than a prescribed value enabling it to be enveloped by the paper.
  • This non-uniformity of thickness is attenuated at a first trimming station positioned upstream of the compression means, which removes a part of the tobacco so as to render the thickness of the stream more consistent and thus ensure that the compacted portions are of uniform density.
  • the conventional machines in question comprise a second trimming station downstream of the compression means, of which the function is to adjust the stream of tobacco to the aforementioned prescribed thickness before it is enveloped by the paper strip.
  • the tobacco removed at the two trimming stations is reclaimed by appropriate recovery means and put back into the cycle at a given point upstream of where the stream is formed, for example added to the continuous flow of tobacco fibres supplied to the riser duct.
  • the reclaimed tobacco is however significantly degraded as the result of undergoing two trimming steps, the particles being unable to bind either with one another or with more fibrous material and thus easily lost from the cut ends of a cigarette, so that the compression step included precisely in order to prevent such losses is rendered fruitless.
  • the reclaimed tobacco Due to the presence of extremely small particles, moreover, the reclaimed tobacco has limited filling capacity and is not of constant density, factors which jeopardize the quality of the cigarettes.
  • the object of the present invention is to provide a unit and a method for forming a continuous rod in a cigarette maker such as will be unaffected wholly or at least in part by the aforementioned drawback.
  • One object of the invention in particular is to provide a unit for forming a continuous cigarette rod in a cigarette maker, and a relative method, such as will ensure that the reclaimable degraded tobacco is not shredded to excess.
  • Figure 1 of the drawings illustrates a unit 1 for forming a continuous cigarette rod 2, constituting part of a cigarette making machine.
  • Such a unit 1 comprises a conveyor 3 by which a continuous stream 4 of tobacco particles is fed toward the entry point 5 of a forming station 6 serving to generate a continuous cigarette rod 2, advancing in a predetermined direction 7 along a predetermined path 8.
  • the forming station 6 is of conventional embodiment and therefore not described further.
  • the conveyor 3 preferably takes the form of an aspirating belt 9 looped around rollers 10 at each end (one only of which is illustrated in figure 1) rotatable about mutually parallel and horizontal axes.
  • the aspirating belt 9 establishes a closed loop compassing a chamber 11 connected by way of a relative duct 12 to a source of negative pressure (not illustrated) and delimited at the bottom by a wall 13 pierced with suction holes 14.
  • the bottom branch 15 of the conveyor belt 9 runs in sliding contact with the wall 13 and is able to retain the fibrous tobacco particles P by suction as they emerge from a vertical riser duct 16 (of which only the left hand part is shown in figure 1) positioned beneath the bottom branch 15, so that the tobacco particles are formed into a continuous stream 4.
  • the unit 1 comprises a looped conveyor 17 of which one branch extends beneath the bottom branch 15 of the aspirating belt 9, occupying a zone of convergence with this same belt 9.
  • the looped conveyor 17 passes around rollers 18 (one only of which is illustrated in figure 1) and includes a top branch 19 located in sliding contact with a table 20, which serves to support a strip of cigarette paper 21 decoiled from a roll 22.
  • the stream 4 of tobacco filler is released by the aspirating conveyor 9 onto the strip of paper 21 and carried into the forming station 6, where it is enveloped by the selfsame paper 21.
  • the unit 1 comprises a first trimming device 23 installed on the predetermined path 8 followed by the stream 4 and operating upstream of the forming station 6, also means 24 operating downstream of the first trimming device 23 relative to the feed direction 7 and serving to densify parts of the tobacco filler coinciding with the portions C aforementioned, and a second trimming device 25 operating downstream of the densifying means 24.
  • the first trimming device 23 brings about a first reduction in thickness of the stream 4 of tobacco filler at predetermined areas, as will become clear in due course.
  • the densifying means 24 and the second trimming device 25 are of conventional type.
  • the densifying means 24 consist in cam-operated forcing elements (one for each line) and the second trimming device 25 comprises a pair of contrarotating circular blades.
  • first trimming device 23 and second trimming device 25 Located in conventional manner beneath the first trimming device 23 and second trimming device 25 are respective recipients, indicated schematically as blocks denoted 26, positioned to collect the shredded tobacco removed by the trimming operation.
  • the reclaimable shredded tobacco is directed back into the processing cycle through the action of conventional recovery means not illustrated in the drawings.
  • the first trimming device 23 serves to reduce the thickness of the stream 4 at predetermined areas corresponding to the aforementioned predetermined densified portions C, and is therefore synchronized in operation with the densifying means 24.
  • the densifying means 24 and the first trimming device 23 operate synchronously with a cutter of familiar type, not illustrated, located downstream of the forming station 6 and timed to divide the continuous cigarette rod into single sticks in such a manner that the densified areas coincide with the cut ends of the sticks.
  • the stream 4 undergoes a second trimming step (figure 4d) along its entire length, in such a way as to establish a predetermined thickness denoted S2.
  • the first trimming device 23 designed to carry out the first trimming step, comprises a rotating knife 27 spaced apart from the bottom branch 15 of the aspirating belt 9 at a distance equivalent to the first thickness S1.
  • the rotating knife 27 comprises a disc 28 furnished with at least one blade 30 that extends radially from the peripheral edge 29 of the disc 28.
  • the disc 28 presents just one blade 30 appearing as an arc to a circle concentric with the disc.
  • the number of individual blades 30 presented by the disc 28, the angular distance compassed by each blade 30 on the edge 29 of the disc 28, and the radius of the blade 30, are design parameters that can vary, without prejudice to the scope of the present invention, according to the characteristics of the cigarettes in production or to the specifications of the machine.
  • the disc 28 rotates about an axis X coinciding with its centre, extending at right angles to the wall 13 of the suction chamber 11 and the bottom branch 15 of the aspirating belt 9.
  • the blade 30 brushes against a locating or striker element 31 afforded by a wall 32 set transversely to the plane occupied by the disc 28 and extending parallel to the stream 4.
  • the striker element 31 is also capable of reciprocating motion in a direction parallel to the predetermined feed direction 7 followed by the stream 4 of tobacco, generated synchronously with the rotating knife 27, so as to avoid sliding contact with the movement of the blade 30 by accompanying its movement.
  • the stream 4 of tobacco advances along a confining channel 34 created between side walls denoted 33a and 33b.
  • the blade 30 functions as a third wall 35 enclosing the channel 34.
  • the method and the unit according to the present invention are instrumental in improving the quality of reclaimed tobacco.
  • the filling capacity of the tobacco is improved compared to the prior art and the finished cigarettes will present a more uniform distribution of tobacco filler from end to end.
  • the generally larger reclaimed tobacco particles will bind more securely with the fibrous material, rather than being easily shed from the ends of the cigarette during subsequent processing operations or when handled by the smoker.

Landscapes

  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)
EP04425765A 2003-10-20 2004-10-11 A unit and a method for forming a continuous cigarette rod in a cigarette maker Withdrawn EP1525809A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO20030612 2003-10-20
IT000612A ITBO20030612A1 (it) 2003-10-20 2003-10-20 Unita' e metodo per la formazione di un baco continuo di

Publications (1)

Publication Number Publication Date
EP1525809A1 true EP1525809A1 (en) 2005-04-27

Family

ID=34385799

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04425765A Withdrawn EP1525809A1 (en) 2003-10-20 2004-10-11 A unit and a method for forming a continuous cigarette rod in a cigarette maker

Country Status (5)

Country Link
US (1) US20050081868A1 (it)
EP (1) EP1525809A1 (it)
CN (1) CN1608528A (it)
IT (1) ITBO20030612A1 (it)
RU (1) RU2004130402A (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700036027A1 (it) * 2017-04-03 2018-10-03 Gd Spa Unità e metodo per la realizzazione di almeno un cordone semilavorato continuo di tabacco

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008081345A2 (en) * 2006-12-28 2008-07-10 Philip Morris Products S.A. Production of a tobacco rod with a hollow cylindrical tube extending therethrough
GB0714972D0 (en) * 2007-08-01 2007-09-12 British American Tobacco Co Method and apparatus for forming tobacco rods

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3318314A (en) * 1959-02-17 1967-05-09 Hauni Werke Koerber & Co Kg Apparatus for producing a continuous tobacco rod
US4485826A (en) * 1980-03-07 1984-12-04 Hauni-Werke Korber & Co. Kg Apparatus for making fillers for rod-shaped smokers' products having dense ends
US4693263A (en) * 1985-03-16 1987-09-15 Hauni-Werke Korber & Co. Kg Method and apparatus for making a composite stream from fibrous material of the tobacco processing industry
EP0743020A1 (en) * 1995-05-18 1996-11-20 G.D. S.p.A. A method and a unit for the formation of a continuous cigarette rod in a cigarette manufacturing machine
US6009879A (en) * 1996-12-03 2000-01-04 Philip Morris Incorporated Tobacco trimming and pre-equalizing device
EP1234513A1 (en) * 2001-02-26 2002-08-28 G. D Societa per Azioni Method and unit for forming a tobacco bead

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5168882A (en) * 1990-06-26 1992-12-08 Fabriques De Tabac Reunies, S.A. Device for checking a stream of tobacco before trimming

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3318314A (en) * 1959-02-17 1967-05-09 Hauni Werke Koerber & Co Kg Apparatus for producing a continuous tobacco rod
US4485826A (en) * 1980-03-07 1984-12-04 Hauni-Werke Korber & Co. Kg Apparatus for making fillers for rod-shaped smokers' products having dense ends
US4693263A (en) * 1985-03-16 1987-09-15 Hauni-Werke Korber & Co. Kg Method and apparatus for making a composite stream from fibrous material of the tobacco processing industry
EP0743020A1 (en) * 1995-05-18 1996-11-20 G.D. S.p.A. A method and a unit for the formation of a continuous cigarette rod in a cigarette manufacturing machine
US6009879A (en) * 1996-12-03 2000-01-04 Philip Morris Incorporated Tobacco trimming and pre-equalizing device
EP1234513A1 (en) * 2001-02-26 2002-08-28 G. D Societa per Azioni Method and unit for forming a tobacco bead

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700036027A1 (it) * 2017-04-03 2018-10-03 Gd Spa Unità e metodo per la realizzazione di almeno un cordone semilavorato continuo di tabacco

Also Published As

Publication number Publication date
ITBO20030612A1 (it) 2005-04-21
RU2004130402A (ru) 2006-03-27
CN1608528A (zh) 2005-04-27
US20050081868A1 (en) 2005-04-21

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