EP3868225B1 - Unit for axial positioning, specifically centring, for machines for making composite filters - Google Patents

Unit for axial positioning, specifically centring, for machines for making composite filters Download PDF

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Publication number
EP3868225B1
EP3868225B1 EP21156061.0A EP21156061A EP3868225B1 EP 3868225 B1 EP3868225 B1 EP 3868225B1 EP 21156061 A EP21156061 A EP 21156061A EP 3868225 B1 EP3868225 B1 EP 3868225B1
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EP
European Patent Office
Prior art keywords
segments
pushing elements
series
groups
conveyor drum
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Active
Application number
EP21156061.0A
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German (de)
English (en)
French (fr)
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EP3868225A1 (en
Inventor
Marco Esposti
Giuliano Gamberini
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GD SpA
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GD SpA
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    • 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
    • A24C5/47—Attaching filters or mouthpieces to cigars or cigarettes, e.g. inserting filters into cigarettes or their mouthpieces
    • A24C5/478—Transport means for filter- or cigarette-rods in view of their assembling

Definitions

  • This invention addresses the technical field of the production of articles of the tobacco industry.
  • this invention concerns a unit, a machine comprising such a unit and a method for axially positioning and/or centring composite filters of the tobacco industry.
  • the invention is also applicable to any type or combination of types of rod-shaped articles of the tobacco industry.
  • composite filter means a cigarette filter obtained by joining end-to-end two or more filter segments, for example, made of different materials and/or having different filtering properties.
  • Such composite filters are obtained by combining filter segments made of different materials and/or having different filtering properties, obtained by cutting respective lengths of filter material using cutting means and, if necessary, adding segments (for example, tubular segments) fed individually and not derived from cutting respective rods.
  • These segments are conveyed and combined by specific combining means in such a way as to obtain ordered sequences of segments that define groups of segments.
  • the groups of segments are then transferred onto a forming beam where the sequence of groups of segments defines a periodically composed, continuous rod, where the periodic composition is generally defined by a double length filter.
  • the group of segments may in some cases exceed the axial dimension of the transverse peripheral seats of the drum itself.
  • the conveyor means can be fed with two or more sub-groups formed of respective segments which will subsequently be transferred to the beam in a predetermined order to define the desired combination, in particular the double-length combination.
  • the two or more sub-groups are fed to the drum in alternating succession repeated in such a way as to avoid the step of making the entire double length combination on the drum.
  • the individual sub-groups are sufficiently limited in size to be housed correctly in the peripheral seats of the conveyor means.
  • centring means which are specifically configured to interact with segment groups having the same axial length and which are unsuitable when the axial dimension is not uniform for all the sub-groups in succession.
  • Centring means of this kind configured to compact groups of segments of uniform overall length, are described in WO2017/85658 and WO2017/009747 , configured for engaging the ends of the segment groups, directly and indirectly, respectively.
  • the technical purpose which forms the basis of this invention is to propose a unit, a machine comprising such a unit and a method for axially positioning and/or centring composite filters to overcome the above mentioned drawbacks of the prior art.
  • this invention has for an aim to provide a unit, a machine comprising such a unit and a method for axially positioning and/or centring composite filters to allow axially positioning and/or compacting at least two successions of groups of composite filters fed alternately and periodically, where each succession of groups of segments has a different longitudinal length.
  • unit 1 a unit for axially positioning and/or centring, and for compacting composite filters of the tobacco industry, hereinafter in this disclosure simply called unit 1.
  • the unit 1 is configured to perform axial positioning and/or centring and compacting of at least two successions of groups of filter segments, where such groups are made up of at least two segments and have different overall axial dimensions.
  • group of segments is used in this disclosure to mean a set of filter segments made of different materials and/or having different filtering properties, disposed in longitudinal alignment according to a predetermined ordered succession.
  • the group of segments may, however, be made up of segments without filtering properties, since the invention is also applicable outside the field of cigarette filters.
  • FIG. 1 A first embodiment of the invention is shown in Figures 1, 2 , 3A-3C and 4A-4B .
  • the unit 1 uses two tangent conveyor drums 2a, 2b movable in rotation about respective axes of rotation Xa and Xb which are parallel to each other, as shown in Figure 1 .
  • the conveyor drums 2a, 2b each have a conveyor surface 4 and two opposite lateral faces 5 and also, on the conveyor surface 4, a plurality of peripheral seats 6 configured to receive and transversely convey groups of segments in a predetermined feed order.
  • the peripheral seats 6 are made in such a way as to extend to at least one of the two lateral faces 5.
  • the groups of segments are conveyed, in the respective peripheral seats 6, in such a way as to create at least two periodic successions S1 and S2, alternated with each other and each comprising specific groups of segments in a configuration such that the groups of segments of the two successions have different longitudinal dimensions (according to an operating principle visible in Figures 4a and 4b ).
  • the end surfaces of the groups of segments housed in adjacent seats 6 are not aligned with each other but staggered.
  • the groups of segments of the first succession S1 have a longer longitudinal dimension than the groups of segments of the second succession S2.
  • the first conveyor drum 2a is configured to be fed with these at least two successions S1, S2 of groups of segments by respective feed stations situated upstream, in which the individual segments that will make up these groups are made and assembled.
  • These feed stations preferably form part of a filter segment combining machine.
  • first conveyor drum 2a is configured to transfer the successions S1, S2 of groups of segments directly to the second conveyor drum 2b.
  • the two drums 2a, 2b might not be adjacent to each other and might have other conveyors situated between them.
  • the first conveyor drum 2a acts in conjunction with a first series E1 of pushing elements 3, while the second conveyor drum 2b acts in conjunction with a second series E2 of pushing elements 3, where the pushing elements 3 are configured for axially compacting the groups of segments in the respective seats 6.
  • the configuration described is such as to centre and compact the first succession S1 of groups of segments on the first conveyor drum 2a by means of the first series E1 of pushing elements 3, and the second succession S2 of groups of segments on the second conveyor drum 2b by means of the second series E2 of pushing elements 3.
  • the pushing elements 3, which are movable at least in a direction parallel to the axis of rotation X of the conveyor drum 2, are housed in respective seats 6, or operate in proximity thereto, to adopt an engaged configuration and a disengaged configuration relative to the segments contained in the seats 6.
  • the pushing elements 3 adopt an axially advanced position along the axis of the drum to come into contact with the respective ends of the groups of segments of the respective successions S1, S2 in such a way as to compact and/or centre each group of segments disposed on the conveyor drum 2.
  • the series E1, E2 of pushing elements 3 are defined by pairs of pushing elements 3 disposed on opposite sides of the drum so as to be able to effectively compact the respective groups of segments.
  • the pushing elements belonging to the first series E1 adopt an axially less advanced position than the pushing elements belonging to the second series E2 since they have to engage groups of segments having a larger axial dimension.
  • the pushing elements 3 adopt an axially retracted position, away from the peripheral seats 6, hence from the respective groups of segments, to enable groups of segments to be loaded onto the conveyor drum 2 and groups of segments to be unloaded from it.
  • the at least two series E1, E2 of pushing elements 3 are disposed according to the predetermined feed order of the successions S1, S2 so that each series of pushing elements 3 operates on the respective ordered succession S1, S2 of groups of segments.
  • the pushing elements 3 are disposed in such a way as to engage the respective succession S1, S2 of the groups of segments for which they are configured.
  • each series E1, E2 of pushing elements 3 will interact only with the respective group of segments having the specific axial dimension with which it is configured to operate.
  • each series E1, E2 are disposed in such a way that each series of pushing elements 3 operates on non-consecutive peripheral seats 6 of the conveyor drum 2.
  • each conveyor drum 2a, 2b is associated with two respective conveying members 7a, 7b which are disposed to confront a respective lateral face 5 of the conveyor drums 2a, 2b.
  • two conveying members 7a are associated with the first conveyor drum 2a and two conveying members 7b are associated with the second conveyor drum 2b.
  • the conveying members 7a, 7b are preferably disc-shaped and can have a diameter substantially equal to the diameter of the respective conveyor drum 2a, 2b.
  • the conveying members 7a, 7b are provided with respective pushing elements 3 of the same series E1, E2, disposed along the transverse conveying direction of the groups of segments and in such a way that each is associated with a respective seat 6 of the drum.
  • the pushing elements 3 are installed on a peripheral portion of the respective conveying members 7a, 7b.
  • the conveying members 7a associated with the conveyor drum 2a mount a first series E1 of pushing elements 3 so as to operate on the first succession S1 of groups of segments
  • the conveying members 7b associated with the conveyor drum 2b mount a second series E2 of pushing elements 3 so as to operate on the second succession S2 of groups of segments.
  • the first succession S1 of groups of segments is axially positioned and compacted on the first conveyor drum 2a, which is acted upon by the first series E1 of pushing elements 3 (as shown in Figure 4A ), while the second succession S2 of groups of segments is processed on the second conveyor drum 2b by the pushing elements 3 of the second series E2 (as shown in Figure 4B ).
  • the pushing elements 3 of the second series E2 act on the first conveyor drum 2a to operate on the second succession S2 of the groups of segments which are smaller in length, while the pushing elements 3 of the first series E1 act on the second conveyor drum 2b to operate on the first succession S1 of the groups of segments which are larger in length.
  • the conveying members 7a, 7b are movable in rotation about a respective axis of rotation Ya, Yb in synchrony with the respective conveyor drum 2a, 2b so that each pushing element 3 acts only on one respective peripheral seat 6, which the pushing element 3 is associated with, and is axially movable alternately along the seat 6 during each rotation of the drum 2.
  • each peripheral seat 6 is acted upon by two pushing elements 3, of the same series E1 or E2 and each belonging to a respective conveying member 7a, 7b.
  • the two pushing elements 3 operate in coordinated and preferably symmetrical manner in such a way as to simultaneously engage, each time, respective opposite ends of the same group of segments.
  • each pushing element 3 is made as one with the respective conveying member 7a, 7b, extending axially away therefrom and being rigidly connected to the other pushing elements 3 of the same series E1, E2.
  • the pushing elements 3 are structurally configured in such a way as to define an alternation of protuberances and/or recesses, as shown in Figure 2 .
  • Figure 3A shows a detail of the conveying members 7a with the pushing elements 3 of the first series E1, which are configured to operate on the first succession S1 of groups of segments.
  • Figure 3b shows a detail of an alternative embodiment of the conveying members 7a, where the pushing elements 3 of the first series E1 are made as one with the conveying members 7a and are not defined by protuberances and/or recesses but by a circular crown.
  • Figure 3C shows a detail of the conveying members 7b with the pushing elements 3 of the second series E2, which are configured to operate on the second succession S2 of groups of segments.
  • the pushing elements 3 of the conveying members 7b have a configuration such as to allow adopting a more advanced axial position so as to be able to operate on a succession of groups of segments with a smaller axial length, that is, the second succession S2 of groups of segments.
  • the axes of rotation Ya, Yb of the conveying members 7a, 7b are inclined relative to the axis of rotation Xa, Xb of the respective conveyor drum 2a, 2b so that the pushing elements 3 of each series E1, E2 are movable periodically along the respective peripheral seat 6, between the engaged configuration and the disengaged configuration, and progressively engage the respective succession S1, S2 of groups of segments in the engaged configuration corresponding to the position where the opposite pushing elements 3 are closest together.
  • the conveying members 7a, 7b associated with the same conveyor drum 2a, 2b have an axis of rotation Ya, Yb that is inclined relative to the axis of rotation Xa, Xb of the respective conveyor drum 2a, 2b mirror symmetrically about the conveying direction of the groups of segments, so that the two pushing elements 3, associated with the same peripheral seat 6, are moved periodically between the engaged configuration and the disengaged configuration.
  • each pushing element 3 is configured to operate movably (and preferably individually) relative to the conveying member 7 periodically, being driven to move between the engaged configuration and the disengaged configuration by a respective actuating member, for example, pneumatic or cam-driven.
  • a respective actuating member for example, pneumatic or cam-driven.
  • the axis of rotation Ya, Yb of each conveying member 7a, 7b may coincide with, or be parallel to, the axis of rotation Xa, Xb of the respective conveyor drum 2a, 2b, the progressive engagement and disengagement with the respective group of segments being accomplished through the periodic movement of each pushing element 3.
  • the lateral faces 5 of the conveyor drum 2 confront respective conveying members 7 movable in rotation about respective axes of rotation Y which are inclined relative to the axis of rotation X of the conveyor drum 2.
  • the first and second series E1, E2 of pushing elements 3 are disposed alternately so they are associated with the two respective successions S1, S2 of groups of segments, as shown in Figure 3A .
  • the two series E1, E2 of pushing elements 3 are disposed in such a way as to follow the arrangement of the two successions S1, S2 of groups of segments: that is to say, the pushing elements 3 of the first series E1 are alternated with the pushing elements 3 of the second series E2.
  • each peripheral seat 6 has two pushing elements 3 of the same series E1, E2 associated with it, so that the two pushing elements 3 operate in coordinated fashion on the respective ends of each group of segments present in the peripheral seat 6.
  • the two series E1, E2 of pushing elements 3 are configured in such a way that the first series E1 of pushing elements 3, in the engaged configuration, adopt a position that is axially less advanced in order to centre and compact the first succession S1 of groups of segments with the larger axial length, while the second series E2 of pushing elements 3, in the engaged configuration, adopt a position that is axially more advanced in order to centre and compact the second succession S2 of groups of segments with the smaller axial length.
  • the groups of segments having different axial dimensions may be greater than two in number, for example, three or four.
  • a succession of blocks of four groups of segments each, having different lengths, is created on the drum or on each drum.
  • an object of this invention is a machine for making composite filters comprising the unit for axial positioning described in the foregoing.
  • the machine comprises a plurality of feed lines for feeding respective filter segments having different filtering properties and/or made of different materials, and a combining apparatus, disposed downstream of the feed lines and configured to form, at the exit, at least two successions of groups having different overall axial dimensions.
  • the combining apparatus is located upstream of the unit for axial positioning.
  • the machine according to this invention is also capable of correctly making and conveying multisegment articles, especially if the articles have variable axial dimensions.
  • an object of this invention is a method for axial positioning and/or centring and for compacting groups of segments.
  • the method comprises a first step of conveying the groups of segments in a predetermined feed order so as to create at least two periodic, alternate successions S1, S2 of groups of segments having different axial dimensions.
  • the method also comprises engaging at least one end of each group with a respective pushing element of a first or second series E1, E2 of pushing elements 3 so that each group of segments belonging to a first succession S1 is engaged by a respective pushing element 3 belonging to the first series E1 of pushing elements 3 and the group of segments belonging to a second succession S2 is engaged by a respective pushing element 3 belonging to the second series E2 of pushing elements 3.
  • one of the two successions S1, S2 may be a succession of axially aligned single segments, instead of groups of segments.
  • the overall length of each group of segments of one succession is different from the length of the single segments of the other succession.
  • the axial pushing action applied by the respective series E1, E2 of pushing elements 3 does not have the function of compacting but only that of centring the single segments (axial positioning).
  • This invention achieves the preset aims by overcoming the disadvantages of the prior art and providing a unit for axial positioning and/or compacting groups of segments, capable of correctly processing alternate successions S1, S2 having non-uniform longitudinal length and considerably increasing the flexibility of using the compacting unit. More specifically, the at least two series of pushing elements may adopt different axially advanced positions to come into contact with the respective successions of groups of segments.

Landscapes

  • Specific Conveyance Elements (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Filtering Materials (AREA)
  • Filtration Of Liquid (AREA)
EP21156061.0A 2020-02-20 2021-02-09 Unit for axial positioning, specifically centring, for machines for making composite filters Active EP3868225B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102020000003467A IT202000003467A1 (it) 2020-02-20 2020-02-20 Unità di posizionamento assiale, in particolare centratura, per macchine per la realizzazione di filtri composti

Publications (2)

Publication Number Publication Date
EP3868225A1 EP3868225A1 (en) 2021-08-25
EP3868225B1 true EP3868225B1 (en) 2022-12-07

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EP21156061.0A Active EP3868225B1 (en) 2020-02-20 2021-02-09 Unit for axial positioning, specifically centring, for machines for making composite filters

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EP (1) EP3868225B1 (it)
IT (1) IT202000003467A1 (it)
PL (1) PL3868225T3 (it)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021101485A1 (de) * 2021-01-25 2022-07-28 Hauni Maschinenbau Gmbh Trommelanordnung zum queraxialen Fördern von stabförmigen Artikeln der Tabak verarbeitenden Industrie

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE347282T1 (de) 2002-09-02 2006-12-15 Hauni Maschinenbau Ag Verfahren und einrichtung zum zusammenstellen von gruppen von filtersegmenten
PL233095B1 (pl) * 2015-07-16 2019-09-30 Int Tobacco Machinery Poland Spolka Z Ograniczona Odpowiedzialnoscia Sposób przesuwania artykułów prętopodobnych, oraz urządzenie do przesuwania artykułów prętopodobnych
PL230321B1 (pl) * 2015-11-19 2018-10-31 Int Tobacco Machinery Poland Spolka Z Ograniczona Odpowiedzialnoscia Sposób przesuwania artykułów prętopodobnych, oraz urządzenie do przesuwania artykułów prętopodobnych

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Publication number Publication date
PL3868225T3 (pl) 2023-03-20
IT202000003467A1 (it) 2021-08-20
EP3868225A1 (en) 2021-08-25

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