EP0059041B2 - Apparatus for forming channels in the periphery of filter elements - Google Patents

Apparatus for forming channels in the periphery of filter elements Download PDF

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Publication number
EP0059041B2
EP0059041B2 EP19820300636 EP82300636A EP0059041B2 EP 0059041 B2 EP0059041 B2 EP 0059041B2 EP 19820300636 EP19820300636 EP 19820300636 EP 82300636 A EP82300636 A EP 82300636A EP 0059041 B2 EP0059041 B2 EP 0059041B2
Authority
EP
European Patent Office
Prior art keywords
troughs
conveyor
parallel
periphery
embossing
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.)
Expired
Application number
EP19820300636
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0059041A1 (en
EP0059041B1 (en
Inventor
Edouard Bättig
Michael Bruno Lauenstein
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.)
Philip Morris Products SA
Original Assignee
Fabriques de Tabac Reunies SA
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 Fabriques de Tabac Reunies SA filed Critical Fabriques de Tabac Reunies SA
Publication of EP0059041A1 publication Critical patent/EP0059041A1/en
Publication of EP0059041B1 publication Critical patent/EP0059041B1/en
Application granted granted Critical
Publication of EP0059041B2 publication Critical patent/EP0059041B2/en
Expired legal-status Critical Current

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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
    • A24D3/025—Final operations, i.e. after the filter rod forming process
    • A24D3/0258—Means for making grooves

Definitions

  • the invention relates to apparatus for forming open channels or grooves in the periphery of fitter elements for smokers requisites, the apparatus comprising two conveyors, one of which carries the elements continuously in a parallel disposition and both of which have a series of troughs each of which having disposed on the inside surface thereof heated embossing dies, the troughs cooperating in facing pairs to surround respective filter elements.
  • Such filter elements can be produced by extruding thermally deformable filter materials in the form of a tow and subsequently dividing the tow into portions.
  • filter elements are carried by a rotary drum conveyor past a stationary heated arcuate element having ribs extending along the path of the filter elements. These ribs impress grooves extending circumferentially round the filter elements.
  • channels are desired which extend not only in the circumferential direction but also in the longitudinal direction of the filter elements.
  • US-A-4164 438 discloses an apparatus for forming grooves in filter plugs for cigarettes, which apparatus has a first conveyor drum, provided with torughs around its circumference and a second conveyor drum also provided with troughs around its circumference, these troughs having embossing dies on their inside surfaces.
  • the troughs are adapted to hold filter plugs.
  • the first conveyor drum cooperates with a drum which transports the filter plugs into the troughs of the first conveyor drum.
  • Longitudinal grooves are embossed into the filter plugs upon their transfer. Further longitudinal grooves are embossed into the filter plugs when the troughs of the first conveyor drum cooperate in facing pairs with the troughs of the second conveyor drum.
  • the troughs on one conveyor are carried alongside those on the other conveyor through an embossing zone along respective paths therein that are parallel or curve in the same sense, each pair of troughs remaining closed after insertion of a filter element and while together carrying it through th.e embossing zone, and all the required number of channels or grooves being embossed simultaneously in the element during passage through the zone.
  • the invention makes it possible to provide the complete periphery of a filter element with impressions of any desired configuration in one operation during the passage.
  • the first conveyor is a rotatable drum with troughs arranged round its periphery parallel to its axis of rotation
  • the second conveyor is a rotatable ring with parallel troughs arranged round on its internal periphery, the ring having an internal diameter larger than the external diameter of the drum, and the drum being eccentrically mounted within the ring with its axis displaced from that of the ring by half the difference between the said diameter, and being rotatable synchronously with the ring.
  • both sets of troughs are arranged parallel to one another on the peripheries of respective endless belt conveyors, the conveyors facing each other in a generally parallel manner in the impression or stamping zone are being driven synchronously so that respective troughs in each conveyor co- operate.
  • the filter elements are to receive grooves which extend in the longitudinal direction from the mouth end (in the finished cigarette), but which do not extend as far as the end remote from the mouth
  • Double-length filter elements are subsequently cut in the centre to form two filter elements, each being sufficient for one cigarette or other smoker's requisite. Troughs for double-length filter elements are also recommended for forming the other channel configurations.
  • the filter elements produced by apparatus according to the invention and provided with embossed stamped or impressed channels or grooves are preferably used for filter cigarettes or for filter mouthpieces of other elongated smoker's requisites in whose mouth-piece secondary air channels are to be provided.
  • the filter elements may be wrapped in a tipping paper which covers the channels and has openings pores, holes or recesses for secondary air that communicate with the covered channels through which the smoker can suck in secondary air or dilution together with the main stream smoke. If the secondary air is only to mix with the mainstream smoke in the mouth, or is not to pass in an uncontrolled manner into the filter element, filter elements are used which have a peripherally airtight wrapping, so that the base of the impressed channels is also made airtight.
  • two endless belt conveyors 1 and 2 are guided over guide pulleys 3, 4, 5, 6 and are provided on their outer peripheries 7, 8 with trough means as at 13, 14, 15, 16, 17, 18, disposed parallel to the rotational axes 9 of the pulleys.
  • Each trough means has in its surface groove or recess into which fits roughly half the periphery of a filter element.
  • the trough means are distributed equidistantly round the entire periphery of the two conveyor belts 1 and 2 and, when passing through the embossing zone 19 and the following zone where the sides 21, 22, of the conveyors are opposed, they face one another in pairs and thereby enclose or mould an inserted filter portion 23 over the entire periphery thereof.
  • the guide pulleys 3,4 are driven synchronously (by means not shown) and rotate in the direction of the arrows.
  • the sides 2, and 22 are backed by rigid slides or runners 24, 25, so that the sides cannot yield.
  • the recesses or moulds 31, 32 of the trough means 13, 16 are provided on their surfaces with elongated, heatable embossing dies 34, 35, 36, 37 which, as shown in Figure 3, do not extend over the entire length of an inserted end to some extent beyond the die 34.
  • the dies 34 to 37 are electrical heating rods, heated by a power supply not shown in the drawings.
  • a supply transfer drum is supplied with individual filter portions 23 from a hopper 52. During the rotation of the transfer drum 51, the filter portions are individually transferred to the troughs of the conveyor belt 2 and from there into the embossing station, in each case enclosed between a pair of troughs from the two conveyor belts 1 and 2.
  • the filter portions may be held in the open troughs, for example, by gravity, suction or mechanical guide.
  • a removal transfer drum 53 removes the now embossed filter portions from the troughs of the conveyor belt 2 and conveys them away for further processing.
  • a double cigarette consists of a double-length filter rod, to each of whose ends a tobacco rod is coaxially fitted, and fixed to the filter element by adherent tipping paper placed around the filter element and the adjacent parts of the tobacco rods.
  • the double cigarette is then cut up into individual cigarettes at the centre of the filter elements, as along the broken lines 55 and 56 in Figure 3.
  • four channels are distributed over the periphery of each filter element and are covered by the tipping material of the particular mouthpiece and extend to the mouth end of the cigarette, which is located as in the sectional plane of the broken lines 55 and 56.
  • the channels do not extend to the end of the filter elements remote from the mouth. Secondary air can enter the channels through pores, holes or recesses provided in the overlying tipping paper.
  • the embossing dies can be arranged to be linear and parallel to the axial direction 40.
  • a trough drum 60 which can be driven in a rotary manner in the direction of the arrow, has an external diameter 61 that is somewhat smaller than the internal diameter 62 of a surrounding trough ring 63, which can be driven in a rotary manner in the same direction as and synchronously with the trough drum 60.
  • the axis of the trough ring 63 is parallel to that of the trough drum 60, but is eccentrically displaced by a distance 64 equal to half the distance between the diameters 61 and 62.
  • the periphery 65 of the trough drum 60 and the internal periphery 66 of the trough ring 63 have equidistant troughs, e.g.
  • the inner surfaces of the troughs of the drum 60 and the trough ring 63 are provided with embossing dies 74, 75, 76, 77, in the same way as the troughs of Figures 2 to 4.
  • the operation of Figures 3 and 4 also occurs in the embossing zone 69.
  • the still unembossed filter portions pass from the outlet of a filter hopper 80 individually into the reception area of the trough drum 60, where they come to occupy the position 82 in Figure 6, and from there they are moved by guide means (not shown) on the trough drum 60 to beneath the trough ring 63 in the position 83 indicated by broken lines.
  • This apparatus is also intended for processing double-length filter portions, as described with reference to Figures 1 to 4.
  • the troughs are initially open for receiving the filter portions from the hopper outlet 80, and then close through the embossing zone 69, after which they open again for transfer of the filter portions to the transfer drum 85.

Landscapes

  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)
EP19820300636 1981-02-14 1982-02-09 Apparatus for forming channels in the periphery of filter elements Expired EP0059041B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3105455 1981-02-14
DE19813105455 DE3105455C2 (de) 1981-02-14 1981-02-14 Vorrichtung zum Einprägen von offenen Kanälen in den Umfang von stabförmigen, am Umfang thermisch deformierbaren Filterabschnitten für rauchbare Artikel

Publications (3)

Publication Number Publication Date
EP0059041A1 EP0059041A1 (en) 1982-09-01
EP0059041B1 EP0059041B1 (en) 1984-09-05
EP0059041B2 true EP0059041B2 (en) 1988-07-13

Family

ID=6124905

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820300636 Expired EP0059041B2 (en) 1981-02-14 1982-02-09 Apparatus for forming channels in the periphery of filter elements

Country Status (3)

Country Link
EP (1) EP0059041B2 (sv)
DE (1) DE3105455C2 (sv)
FI (1) FI68162C (sv)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4492238A (en) * 1981-09-30 1985-01-08 Philip Morris Incorporated Method and apparatus for production of smoke filter components
US4480982A (en) * 1983-02-07 1984-11-06 Brown & Williamson Tobacco Corporation Apparatus for making grooves in cigarette filters
US4514249A (en) * 1984-07-19 1985-04-30 Brown & Williamson Tobacco Corporation Device for making grooves in cigarette filters
GB201115157D0 (en) * 2011-09-02 2011-10-19 British American Tobacco Co Manufacturing grooved smoking rods
ES2978493A1 (es) * 2023-02-06 2024-09-13 Univ Dalacant / Univ De Alicante Filtro reductor de alquitranes y compuestos tóxicos del tabaco, barra fibrosa a partir de la que se obtiene el filtro, y mecanismo para la fabricación de la barra fibrosa

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3190294A (en) * 1958-09-30 1965-06-22 Celanese Corp Cigarette filters
IL36205A (en) * 1970-02-21 1973-05-31 Cigarette Components Ltd A device for treating tobacco smoke and a method for its production
US4022221A (en) * 1975-10-31 1977-05-10 American Filtrona Corporation Tobacco smoke filter
GB1507765A (en) * 1976-03-17 1978-04-19 British American Tobacco Co Production of tobacco-smoke filters
CH608176A5 (sv) * 1976-10-05 1978-12-29 Baumgartner Papiers Sa

Also Published As

Publication number Publication date
EP0059041A1 (en) 1982-09-01
FI68162B (fi) 1985-04-30
DE3105455C2 (de) 1985-07-25
FI68162C (fi) 1985-08-12
EP0059041B1 (en) 1984-09-05
FI820470L (fi) 1982-08-15
DE3105455A1 (de) 1982-11-04

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