EP0213081B1 - Unité de filtre pour cigarette - Google Patents

Unité de filtre pour cigarette Download PDF

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Publication number
EP0213081B1
EP0213081B1 EP86810377A EP86810377A EP0213081B1 EP 0213081 B1 EP0213081 B1 EP 0213081B1 EP 86810377 A EP86810377 A EP 86810377A EP 86810377 A EP86810377 A EP 86810377A EP 0213081 B1 EP0213081 B1 EP 0213081B1
Authority
EP
European Patent Office
Prior art keywords
membrane
filter unit
openings
cross
section
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 - Lifetime
Application number
EP86810377A
Other languages
German (de)
English (en)
Other versions
EP0213081A1 (fr
Inventor
Serge Veluz
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.)
Baumgartner Papiers SA
Original Assignee
Baumgartner Papiers 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 Baumgartner Papiers SA filed Critical Baumgartner Papiers SA
Priority to AT86810377T priority Critical patent/ATE58820T1/de
Publication of EP0213081A1 publication Critical patent/EP0213081A1/fr
Application granted granted Critical
Publication of EP0213081B1 publication Critical patent/EP0213081B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • A24D3/04—Tobacco smoke filters characterised by their shape or structure

Definitions

  • the invention relates to a cigarette filter unit with at least one switching element arranged in the flue gas flow cross-section for gradually switching automatically when smoking from an initial flue gas path to at least one further flue gas path within the filter unit.
  • a filter cigarette is known from DE-A-2 209 763, in which a stopper provided with openings is arranged between the tobacco section and a ventilation area. These openings can be obtained either by mechanically perforating the plug material or by using a paper material which is inherently porous. If the openings are achieved by mechanical perforation of a stopper, the opening cross section and the thickness of the stopper are too large, since too much tar is then required when smoking in order to achieve a usable switching effect.
  • the object of the present invention is, in particular, to create a cigarette filter unit which, even in the case of large series production, makes it possible to adhere to precisely defined switchover conditions and thus to precisely defined pollutant values when used in filter cigarettes, while limiting the maximum possible suction resistance in use to a relatively precisely predetermined value.
  • Ventilation openings (4) extending between the inside and the outside of the filter unit are provided downstream of the membrane (3).
  • the thickness of the membrane in the range of 30 microns to 100 and the cross-sectional area of the individual, sieve-like openings provided in the membrane in a range from 100 to 2500 pm 2, preferably in a range from 100 to 1800 Jl m 2, is .
  • the membrane consists of natural textile and / or synthetic fibers, preferably in the form of a fabric or a perforated film .
  • a ventilation air path if provided, has ventilation openings in such a number and with such a cross section that an initial dilution with ventilation air in a range of 30 to 70%, preferably in a range of 45 to 55%.
  • the number of membrane openings provided in the membrane and their cross-sectional areas are matched to one another in such a way that when an air quantity of 17.5 ml / s is extracted from the suction-side end of the filter unit, the latter causing a pressure drop in the range from 25 to 150 mm WS.
  • the distance between individual openings of the membrane and the size of the cross-sectional areas of these openings deviate less than 10% from the specified value.
  • the membrane has openings of different cross-sectional areas with a precisely defined size after a precisely predetermined distribution.
  • the inner cross section of the filter unit is provided at the location of the membrane with the exception of the latter with a partition and carrier intermediate wall connected to the latter and consisting of at least approximately gas-impermeable material.
  • partition and support wall and / or the membrane are provided with one or more flow openings, the individual cross-sectional areas of which are larger than 10 4 p M 2 .
  • the membrane is arranged in the flow cross-section of a tube consisting of at least approximately gas-impermeable material and the remaining cross-section is between the outside of the tube and the outside of the filter unit is filled with tobacco smoke filtering material over at least part of the tube length. It is expedient for the tube serving to form two separate flow channels to be filled with granular and / or fibrous filter material at least over part of its length.
  • a filter element which changes the composition of the tobacco smoke is arranged in the flow cross-section of the filter unit before and / or after the membrane.
  • the cigarette filter unit 2 ′ which is shown very schematically there and is fastened to a tobacco part 1 in the usual way by means of so-called tipping paper, has a sieve-shaped membrane 3 arranged in its flue gas flow cross section.
  • this membrane 3 the spatial distribution of the membrane openings over the entire membrane surface and the cross-sectional areas of the membrane openings in size and shape are precisely known in order to achieve precisely reproducible application behavior, and it consists of a synthetic fiber, e.g. Polymer fibers, manufactured fabrics.
  • the membrane 3 arranged in the filter unit 2 ' is not intended to filter aerosols out of a flue gas stream flowing through them.
  • the filtering capacity of the membrane 3 for the particular phase of the flue gas stream flowing through is measurable, but in practice it is very small and negligible.
  • the membrane 3 is therefore not intended to serve as a filter element, but rather as a switching element.
  • the thickness of the membrane 3 must be very small, so that the latter causes a relatively small initial flow resistance.
  • the effect of the membrane 3 in the filter unit 2 ' is such that when a flue gas aerosol flows through the membrane 3, a very small proportion of the aerosol particles adhere to the membrane 3, but this proportion is large enough to cause a noticeable reduction of the free cross sections of the membrane openings and thereby to cause a sharp increase in the flow resistance caused by the membrane 3 thus loaded.
  • the thickness of the membrane 3 is in a range from 30 to 100 ⁇ m, the number of membrane openings in a range from 500 to 25,000, and the cross section of the individual membrane openings in a range from 100 to 2500 ⁇ m 2 .
  • the membrane 3 In order to be sure that in the large-scale production of such cigarette filter units 2 ', exactly reproducible characteristic values of the latter are achieved, the membrane 3 must not consist of a material in which the spatial distribution of the flue gas through openings as well as their cross sections and cross-sectional shapes is random, as is the case e.g. the use of a thin, highly porous paper membrane would be the case where the loose paper fiber arrangement and thus the distribution and size of the passage openings formed in this way are very different locally.
  • the latter are provided in such a number and with such cross sections that, for example, an initial dilution of the tobacco smoke extracted from the tobacco part 1 of 50% is achieved.
  • the inner cross section of the filter unit 2 ' is provided at the location of the membrane 3 except for the latter with a partition and support intermediate wall 5 connected to it and made of at least approximately gas-impermeable material.
  • the partition and support partition 5 is provided with a plurality of flow openings 6 to achieve a flue gas diversion, the cross sections of which are, however, much larger than those of the membrane openings, for example at least ten times are bigger.
  • a flue gas diversion allows a flue gas flow to be maintained even when the membrane 3 is almost or completely blocked, and limits the maximum possible suction resistance in use to a relatively precisely predetermined value.
  • the through-flow openings are provided in the latter instead of in the partition and support wall 5 holding the membrane 3 by additional perforation 6 'of the latter.
  • the membrane 3 is arranged in the flow cross-section of a tube 7 made of practically gas-impermeable material and the remaining cross-section forming the second flow channel 11 between the outside of the tube 7 and the inside of the outer casing of the filter unit (2 '' ') is filled with filter material 9 which filters through tobacco smoke and which is provided with at least one through-opening whose cross-section is at least ten times larger than the cross-section of the largest membrane opening.
  • the tobacco smoke initially passes unfiltered through the first flow channel 10 and through the membrane 3 into the smoker's mouth.
  • the flow resistance of the membrane 3 increases, as already described above, and the increasingly concentrated tobacco smoke flowing out of the tobacco part 1 is thereby increasingly conducted via the second flow channel 11 through the filter material 9 filtering through the tobacco smoke, so that also by means of a such design of the filter unit 2 ′′, the concentration of the various smoke gas components and thus the smell felt by the smoker can be kept relatively constant over the entire smoking period of the tobacco part 1 without the suction resistance determined by the smoker during smoking changing significantly or in an unpleasant manner.
  • the interior of the tube 7 forming the first flow channel 10 is filled with a granular filter material 12, which can also be loaded with an aroma, and on the outside of the tube 7, a chamber filter 9 'is arranged in the second flow channel 11, in which an annular chamber 16 for receiving a free-flowing filter and / or aromatic carrier material is formed between an annular cellulose and an annular acetate plug.
  • the increasing flow diversion through the second flow channel 11, which is caused by the diaphragm 3 as the tobacco part 1 becomes more and more worn, is analogous to the exemplary embodiment shown in FIG.
  • a cellulose or an acetate filter plug 13 or 14 is arranged in front of and behind the membrane 3 in the flow cross-section of the filter unit 2 "" analogously to a conventional dual filter, as seen in the flow direction.
  • FIGS. 6 and 7 in complete contrast to the cigarettes previously on the market, it is possible to produce such a cigarette end piece according to the invention, with the aid of which a smoking characteristic can be achieved, according to which after an initial increase in the condensate stop / train the same decreases with increasing smoking of the cigarette (FIG. 6) or decreases and thereafter remains approximately constant (FIG. 7).
  • FIGS. 8, 9 and 10 In principle, different membrane sieves are shown in FIGS. 8, 9 and 10.

Landscapes

  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)

Claims (13)

1. Unité de filtre pour cigarettes comprenant au moins un élément inverseur disposé dans la section transversale de l'écoulement de la fumée, cet élément étant destine lors du fumage, au passage automatique progressif d'une voie empruntée initialement par les gaz de fumée à au moins une autre voie destinée aux gaz de fumée, au sein de l'unité de filtre, l'élément inverseur qui recouvre une partie de la section transversale de cette dernière étant réalisé sous forme d'un diaphragme (3) de type filtrant, unité dans laquelle la répartition spatiale des ouvertures du diaphragme, ainsi que leurs surfaces de section, correspondent, quant à leur dimension et à leur forme, à une répartition prédéterminée; en ce que l'épaisseur du diaphragme (3) se situe dans un domaine allant de 10 à 150 pm; le nombre des ouvertures pratiquées dans le diaphragme (3) se situe dans un domaine allant de 500 à 25,000; et la surface de section de ces ouvertures se situe dans un domaine allant, chaque fois, de 80 à 3.000 itm2; et en ce qu'au moins une ouverture d'écoulement (6, 6', 11) dont la section transversale est au moins dix fois supérieure à la section transversale de la plus grande ouverture pratiquée dans le diaphragme, est disposée dans la zone du diaphragme (3) dans la partie restante de la section transversale de l'unité de filtre.
2. Unité de filtre selon la revendication 1, caractérisée en ce qu'on prévoit, après le diaphragme (3) (vu en direction de l'écoulement), des ouvertures de ventilation (4) s'étendant entre le côté interne et le côté externe de l'unité de filtre.
3. Unité de filtre selon l'une quelconque des revendications précédentes, caractérisée en ce que l'épaisseur du diaphragme (3) se situe dans le domaine allant de 30 à 100 µm et la surface de section de chacune des ouvertures pratiquées dans le diaphragme et prévues sous la forme de filtres, se situe dans le domaine allant de 100 à 2500 pm", de préférence, dans un domaine allant de 100 à 1.800 um2.
4. Unité de filtre selon l'une quelconque des revendications précédentes, caractérisée en ce que le diaphragme (3) est constitué de fibres synthétiques et/ou de fibres de textile naturelles, de préférence, sous forme d'un tissu ou bien d'une feuille mince perforée.
5. Unité de filtre selon l'une quelconque des revendications précédentes, caractérisée en ce que la voie réservée à l'air de ventilation présente des ouvertures de ventilation (4) selon un nombre et une section transversale, tels que l'on obtient un apport initial d'air de ventilation, qui se situe dans un domaine allant de 30 à 70%, de préférence, dans un domaine allant de 45 à 55%.
6. Unité de filtre selon l'une quelconque des revendications précédentes, caractérisé en ce qu'on détermine successivement le nombre des ouvertures prévues dans le diaphragme (3), ainsi que leurs surfaces de section, de telle sorte que, lors d'une aspiration d'une quantité d'air de 17,5 ml/s, depuis l'extrémité côté aspiration de l'unité de filtre, par l'intermédiaire de cette dernière, on obtient une chute de pression qui se situe dans le domaine allant de 25 à 150 mm WS.
7. Unité de filtre selon l'une quelconque des revendications précédentes, caractérisée en ce que la distance entre chacune des ouvertures pratiquées dans le diaphragme (3) et la dimension des surfaces de section de ces ouvertures, s'écartent de moins de 10% de la valeur prédéfinie.
8. Unité de filtre selon l'une quelconque des revendications précédentes, caractérisée en ce que le diaphragme (3) présente des ouvertures à répartition prédéfinie avec précision, dont la dimension des surfaces de section différentes est définie avec précision.
9. Unité de filtre selon l'une quelconque des revendications précédentes, caractérisée en ce que sa section transversale interne à l'endroit du diaphragme (3), est munie, à l'exception de ce dernier, d'une paroi intermédiaire de séparation et de support (5) reliée au diaphragme et constituée d'une matière au moins approximativement imperméable aux gaz.
10. Unité de filtre selon l'une quelconque des revendications précédentes, caractérisée en ce que la paroi intermédiaire de séparation et de support (5) et/ou le diaphragme (3) est (sont) muni(s) d'une ou de plusieurs ouvertures d'écoulement (6, 6', 11) dont les surfaces de section sont, chaque fois, supérieures à 104 Jlm2.
11. Unité de filtre selon l'une quelconque des revendications précédentes, caractérisée en ce que le diaphragme (3) est disposé dans la section transversale d'écoulement d'un petit tube (7) constitué d'une matière au moins approximativement imperméable aux gaz, la section transversale restante comprise entre le côté externe du petit tube (7) et le côté externe (8) de l'unité de filtre (2"'), est remplie au moins sur une partie de la longueur du petit tube, d'une matière (9) filtrant la fumée de tabac.
12. Unité de filtre selon la revendication 11, caractérisée en ce que le petit tube (7) servant à constituer deux canaux d'écoulement (10, 11) séparés l'un de l'autre, est rempli en son sein d'une matière filtrante (12) fibreuse et/ou granuleuse, au moins sur une partie de sa longueur.
13. Unité de filtre selon l'une quelconque des revendications précédentes, caractérisée en ce qu'on dispose (vu dans le sens de l'écoulement), avant et/ou après le diaphragme (3), dans la section transversale d'écoulement de l'unité de filtre (2" "), un élément filtrant (13, 14) modifiant la composition de la fumée du tabac.
EP86810377A 1985-08-26 1986-08-25 Unité de filtre pour cigarette Expired - Lifetime EP0213081B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86810377T ATE58820T1 (de) 1985-08-26 1986-08-25 Zigarettenfiltereinheit.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3664/85 1985-08-26
CH3664/85A CH668533A5 (de) 1985-08-26 1985-08-26 Zigarettenfiltereinheit.

Publications (2)

Publication Number Publication Date
EP0213081A1 EP0213081A1 (fr) 1987-03-04
EP0213081B1 true EP0213081B1 (fr) 1990-12-05

Family

ID=4260855

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86810377A Expired - Lifetime EP0213081B1 (fr) 1985-08-26 1986-08-25 Unité de filtre pour cigarette

Country Status (7)

Country Link
US (1) US4747418A (fr)
EP (1) EP0213081B1 (fr)
JP (1) JPS6248368A (fr)
AT (1) ATE58820T1 (fr)
CA (1) CA1258023A (fr)
CH (1) CH668533A5 (fr)
DE (2) DE3533716A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3741408A1 (de) * 1987-12-07 1989-06-15 Alexei Filippenko Filter zu anordnung in einer zigarettenspitze insbesondere fuer das rauchen von von nikotin und schaedlichen inhaltsstoffen befreiten zigaretten
DK499289A (da) * 1988-10-12 1990-04-13 Rothmans Int Tobacco Stangelementer til cigaretfiltre og cigaretter udstyret med saadanne stangelementer
US5509429A (en) * 1989-03-02 1996-04-23 Kothmans, Benson & Hedges Inc. Uniform tar delivery profile filter
US5657773A (en) * 1995-12-12 1997-08-19 George; Nadim William Cigarette rolling paper with rolling assist
DE20221123U1 (de) * 2001-08-30 2005-02-10 Jurop Ag Filtervorrichtung mit Zigarettenpapier
ITAN20120002A1 (it) * 2012-01-12 2013-07-13 Stefania Romagnoli Filtro per sigarette modulare

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE255106C (fr) * 1911-01-20
US2954786A (en) * 1958-05-19 1960-10-04 Macfarland Aveyard & Company Tobacco tar removal structure
US3394707A (en) * 1964-10-08 1968-07-30 Charles A. Ellis Cigarette filter and method of manufacture
US3496945A (en) * 1967-03-31 1970-02-24 Abraham Emil Tomkin Air-admixed cigarette utilizing restrictive-flow orifice
US3527235A (en) * 1968-05-24 1970-09-08 Matra Corp Tobacco smoke filter device
US3503406A (en) * 1968-10-28 1970-03-31 Lawrence Murry Riegel Cigarettes
FR2053737A5 (fr) * 1969-07-16 1971-04-16 Ohkura Masahiko
US3714949A (en) * 1971-02-16 1973-02-06 D King Cigarette filter
CA953600A (en) * 1971-03-03 1974-08-27 Thomas W. Summers Cigarette filter
US3809097A (en) * 1971-07-27 1974-05-07 B Clayton Tobacco smoke filter
GB1371794A (en) * 1971-09-06 1974-10-30 British American Tobacco Co Tobacco-smoke filters
US4197863A (en) * 1974-05-02 1980-04-15 Benjamin Clayton Tobacco smoke filter
DE8108824U1 (de) * 1981-03-26 1982-07-29 Pruss, Günter, 2211 Wrist Zigarettenfilter
SE453149B (sv) * 1981-07-06 1988-01-18 Cigarette Components Ltd Cigarrettfilter med tvergaende hinder

Also Published As

Publication number Publication date
JPS6248368A (ja) 1987-03-03
ATE58820T1 (de) 1990-12-15
CA1258023A (fr) 1989-08-01
US4747418A (en) 1988-05-31
EP0213081A1 (fr) 1987-03-04
CH668533A5 (de) 1989-01-13
DE3533716A1 (de) 1987-03-05
DE3676010D1 (de) 1991-01-17

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