SI8210490A8 - Cigarette filter - Google Patents

Description

BROWN & WILLIAMSON TOBACCO CORPORATIONBROWN & WILLIAMSON TOBACCO CORPORATION

FILTER ZA CIGARETECIGARETTE FILTER

Oblast tehnikeTechnical field

Pronalazak je iz oblasti proizvodnje cigareta i odnosi se na poboljšani filter za cigarete (MKP A 24C 5/50).The invention relates to the field of cigarette production and relates to an improved cigarette filter (MKP A 24C 5/50).

Tehnički problemTechnical problem

Tehnički problem koji se rešava ovim pronalaskom je u torne da se filter za cigarete tako konstruiše tj. da se odreden broj kanala, čiji je poprečni presek u odredenoj srazmeri sa poprečnim presekom filtera, tako rasporedi u odnosu na osta le delove filtera da se omoguči što potpunija disperzija duvanskog dima odmah po njegovom. izlasku iz filtera. Ovim se ujedno omogučuje i znatno smanjivanje količine štetnih materija u duvanskom dimu koji dolazi u usta pušača bez negativnog uticaja na ukus dima.The technical problem that is solved by the present invention is in the towers so that the cigarette filter is designed in this way. that a certain number of channels having a cross-section in proportion to the cross-section of the filter be arranged with respect to the other portions of the filter to allow the tobacco smoke to be dispersed as completely as possible as soon as possible. exiting the filter. This also allows for a significant reduction in the amount of harmful substances in the tobacco smoke entering the mouth of the smoker without adversely affecting the taste of the smoke.

Stanje tehnikeThe state of the art

U tehnici su poznati filteri za cigarete koji omogučuju uvodenje okolnog vazduha u duvanski dim u cilju njegovog razredivanja, koje smanjuje količinu dimnih cesti ca i gasovitih sastojaka.koji dospevaju u usta pušača. Za uvodenje ventilacionog vazduha u cigarete predložena su razna sredstva. Na primer, omotač duvanskog dela cigarete može biti od poroznog materijala što omogučava ulazak vazduha duž čitave cigarete i njegovo mešanje sa strujom dima koja se na taj način razreduje.Takode omotač cigarete može biti izbušen na odredenim mestima radi ulaska ventilacionogCigarette filters are known in the art that allow the ambient air to be introduced into tobacco smoke for the purpose of diluting it, which reduces the amount of fumes and gaseous components that enter the mouth of smokers. Various means have been proposed for the introduction of ventilation air into cigarettes. For example, the tobacco wrapper of a cigarette may be of porous material, which allows air to enter throughout the cigarette and mix it with the flow of smoke thus diluted. Also, the cigarette wrapper may be drilled in certain places to allow ventilation to enter.

- 2 vazduha. Dalje je poznato da se izbuši omotač filtera da bi se omoaučio ulazak ventilacionog vazduha u cilju razredivanja dimne struje.Postoji odredeni broj pred loga da se telo filtera izvede sa žljebovima,koji bi omogučili ulazak ventilacionog vazduha u struju dima.- 2 air. It is further known that a filter jacket is drilled to allow ventilation air to flow in order to dilute the flue current. There is a certain number of logs to carry out the filter body with grooves to allow the air to flow into the smoke stream.

Na primer, US patent No.3,596,663 odnosi se na filter duvanskog dima sa nabranim poroznimomotačem,koji okružuje filterski elemenat,koji je omotan završnim omotačem koji ima otvore kroz koje ventilacioni vazduh direktno ulazi u filterski elemenat iii ide niz žljebove do usta pušača. US Patent No.3,490,491 odnosi se na filter za cigarete koji predstavlja cevasto telo od ekstrudovanog termoplastičnog materijala koje ima više uzdužnih žljebova u spoljnjoj površini i pričvrščeno je za filterski elemenat koji je smešten unutar te cevi, pri čemu ventilacioni vazduh ide niz žljebove, a dim struji kroz cev. Drugi patenti koji se odnose na filtere za cigarete imaju žljebove oko filterskog elementa za uvodenje ventilacionog vazduha u filter obuhvataju US patente No.3,577,995,No.3,572,347, No.1,718, 122, No.3,788,330, No.3,773,053, No.3,752,165, No.3,638,661, No.3,608,561; zapadno nemačke patente No.2,302,677; britanske patente No.1,414,745,No.1,360,612, No.1,360,611; i US patent No.3,910,288, pri čemu se navedeni britanski patenti odnose na acetatne filtere bez omotača.For example, U.S. Patent No. 3,596,663 relates to a tobacco smoke filter with a pleated porous envelope surrounding a filter element, which is enveloped by a finisher having openings through which the ventilation air directly enters the filter element or goes down the grooves to the mouth of the smoker. U.S. Patent No. 3,490,491 relates to a cigarette filter which is a tubular body of extruded thermoplastic material having multiple longitudinal grooves in the outer surface and is attached to a filter element housed within that tube, wherein the ventilation air flows down the grooves and the smoke it flows through a tube. Other patents relating to cigarette filters have grooves around the filter element for introducing ventilation air into the filter include US patents No.3,577,995, No.3,572,347, No.1,718, 122, No.3,788,330, No.3,773,053, No.3,752,165, No .3,638,661, No.3,608,561; West German Patents No.2,302,677; British Patents No.1,414,745, No.1,360,612, No.1,360,611; and US Patent No. 3,910,288, wherein said British patents relate to acetate filters without a sheath.

Nedostatak filtera koji se primenjuju kod cigareta sa ultra-niskim sadržajem katrana, a to su one koje imaju manje od 5 miligrama katrana po cigareti( što je odredeno metodom objavi jenom od H.C.Pil1sbury,et al u radu Katran i nikotin u duvanskom dimu, J.Assoc.Offic.Anal .Chem.Sveska 52,strane 458-462,1969, a koja se metoda uobičajeno naziva testom prihvačenim od strane Federal Trade Commission) je u tome što se primenjuje velika količina ventilacionog vazduha radi razredivanja dima koji napušta filter. Kod navedenih filtera za cigarete velika količina ventilacionog vazduha u odnosu na količinu duvanskog dima dovodi do formiranjaLack of filters applicable to ultra-low tar cigarettes, which are less than 5 milligrams of tar per cigarette (as determined by the method published by HCPil1sbury, et al. In Tar and Nicotine in Tobacco Smoke, J .Assoc.Offic.Anal .Chem. Volume 52, pages 458-462,1969, which is commonly referred to as a test accepted by the Federal Trade Commission) is that a large amount of ventilation air is used to dilute the smoke leaving the filter. With the above cigarette filters, a large amount of ventilation air relative to the amount of tobacco smoke causes formation

- 3 vazdušnog omotača oko dima koji dolazi do usta pušača tako da pušač može da oseti vrlo malo ukus dima od cigarete.- 3 air envelopes around the smoke that comes to the smoker's mouth so that the smoker can smell very little cigarette smoke.

Opis rešenja tehničkog problema sa popisom i kratkim opisom slika načrtaDescription of a solution to a technical problem with a list and brief description of the plan pictures

Navedeni tehnički problem rešava se novim filterom za cigarete, koji kao i poznati filteri obuhvata porozno telo filtera pričvrščeno za duvanski stub cigarete,koje telo se sastoji od porozno filterskog elementa i neporoznog omotača, a od poznatih filtera se razlikuje po torne, što je više, a najcelishodnije tri do sedam ventilacionih kanala izvedeno i raporedeno po obimu tela filtera, pri čemu je svaki od tih kanala otvoren na kraju filtera koji ide u usta pušača i povezan je sa otvorima u završnom omotaču, a srazmera prosečne površine poprečnog preseka tih kanala i ukupne površine poprečnog preseka filtera je manja od 0,01. Sem toga obim filtera je od 20 do 27 mm, a navedeni kanali su uglavnom simetrično rasporedeni oko.tela filtera, dok rastojanje izmedu centara susednih kanala iznosi najmanje osam poluprečnika tih kanala.The aforementioned technical problem is solved by a new cigarette filter, which, like known filters, includes a porous filter body attached to a tobacco cigarette stem, which body consists of a porous filter element and a non-porous wrapper, which is distinguished from known filters by the frills. and most preferably three to seven ventilation ducts are constructed and arranged according to the circumference of the filter body, each of these ducts being open at the end of the filter which goes into the mouth of the smoker and is connected to the openings in the end jacket and the proportion of the average cross-sectional area of those ducts and the total the filter cross-sectional area is less than 0.01. In addition, the circumference of the filters is from 20 to 27 mm, and the said channels are generally symmetrically arranged around the body of the filter, while the distance between the centers of adjacent channels is at least eight radii of these channels.

Pronalazak če detaljnije biti objašnjen pomoču priloženih erteža na kojima Slika 1 predstavlja izgled filtera prema pronalasku u perspektivi;The invention will be explained in more detail with the aid of the enclosed sketches, in which Figure 1 is a perspective view of the filter according to the invention;

Slika 2 je perspektivni izgled filtera sa slike 1 pričvrščenog za cigaretu sa omotačem prikazanom u odmotanom stanju; iFigure 2 is a perspective view of the filter of Figure 1 attached to a cigarette with a wrapper shown in unwrapped condition; i

Slika 3 je perspektivni izgled drugog oblika filtera prema pronalasku pričvrščenog za cigaretu sa omotačem prikazanim u odmotanom stanju.3 is a perspective view of another shape of the filter according to the invention attached to a cigarette with a wrapper shown in unwrapped condition.

Na slici 1, prikazano je telo 2 filtera,koje celishodno ima obim od 20 do 27mm. Telo 2 filtera sastoji se od filterskog elementa 10 od celuloznog acetata iii nekog drugog vlaknastog iii penastog materijala koji se obično upotrebljava za tu svrhu i obmotano je neporoznim omotačem 12. Izraz neporozni omotač obuhvataFigure 1 shows the body of the 2 filters, which expediently have a range of 20 to 27mm. The filter body 2 consists of a filter element 10 of cellulose acetate or any other fibrous or foam material commonly used for this purpose and is wrapped in a non-porous sheath 12. The term non-porous sheath includes

- 4 kako neporoznu spoljnu površinu penastog materijala koja je integralni deo filterskog elementa tako i neporozni omotač koji nije integralni deo filterskog elementa. Telo 2 filtera je izvedeno sa više kanala 14 koji se pružaju uzdužno. Mada je na slici prikazano samo četiri kanala,koji su simetrično rasporedeni oko filterskog elementa, kanala može da bude i više, a bitno je da razmak izmedu centara susednih kanala bude jednak najmanje osm2 ostrukom poluprečniku kanala to jest za kanal od , na primer, 0,0040 cm (0,05 cm poluprečnik) centar susednih kanala treba da bude udaljen najmanje 0,4 cm od njegovog centra.- 4 both the non-porous outer surface of the foam material being an integral part of the filter element and the non-porous sheath not being an integral part of the filter element. The filter body 2 is made of multiple channels 14 extending longitudinally. Although the figure shows only four channels, which are symmetrically arranged around the filter element, there may be more channels, and it is important that the distance between the centers of adjacent channels be at least eight to the sharp radius of the channel, that is, for example, 0 , 0040 cm (0.05 cm radius) the center of adjacent ducts should be at least 0.4 cm from its center.

Telo 2 filtera se uglavnom pravi tako što se standardni filterski štapiči od celuloznog acetata iii sličnog materijala omotani neporoznim materijalom izlažu dejstvu toplote u odredenim kalupima napravljenim tako da prave odgovarajuče kanale na telu filtera. Takav poznati metod je tzv. tehnika toplotnog obl i kovanja.The body of the 2 filters is generally made by exposing standard filter rods of cellulose acetate or a similar material wrapped with non-porous material to the effects of heat in certain molds made to make appropriate channels on the body of the filter. Such a known method is the so-called. technique of thermal obl and forging.

Na slici 2 telo 2 filtera sa slike 1 je pričvrščeno za duvanski stub 3 cigarete pomoču završnog omotača 16 koji je izveden sa više otvora 18 koji su povezani sa kanalima 14 tako da ventilacioni vazduh radijalno ulazi u kanale 14 kroz otvore 18. Kao što je prikazano na slici 2 , ventilacioni vazduh ulazi kroz otvore 18 zatim ide niz kanale 14 prema ustima pušača. Veličina otvora 18 i njihov broj odreduje se u skladu sa željenom količinom ventilacionog vazduda.In FIG. 2, the filter body 2 of FIG. 1 is attached to the tobacco stack 3 of the cigarette by means of a end wrap 16 which is made with multiple openings 18 connected to the channels 14 so that the ventilation air enters the channels 14 through the openings 18. As shown in Figure 2, the ventilation air enters through the openings 18 then goes down the ducts 14 towards the smoker's mouth. The size of the openings 18 and their number are determined according to the desired amount of ventilation air.

Na slici 3 telo 6 filtera je prikazano pričvrščeno za duvanski stub 7 cigarete pomoču završnog omotača 36 koji ima više otvora 38 povezanih sa kanalima 34. Telo 6 filtera se sastoji od filterskog elementa 30 od celuloznog acetata iii drugog pogodnog vlaknastog iii penastog materijala koji je okružen cevastim plastičnim omotačem 32. Plastični omotač 32 može da ima kanale 34 koji se pru- 5 žaju samo duž jednog dela spoljne površine tog omotača ili se mogu pružati duž čitave njegove dužine. Ako se kanali 34 pužaju duž čitave dužine moraju se predvideti zaptivna sredstva za sprečavanje ulaska dima iz duvanskog stuba u te kanale ili če omotač 32 imati površinu poprečnog preseka dovoljno veču od površine poprečnog preseka duvanskog stuba tako da če kanali 34 biti otvoreni u odnosu na okolnu atmosferu. Cevasti , plastični omotač 32 može se proizvesti bilo kojom poznatom metodom kao na primer, ekstrudovanjem.In Figure 3, the filter body 6 is shown attached to the tobacco cigarette bar 7 by means of a end wrapper 36 having multiple openings 38 connected to the ducts 34. The filter body 6 consists of a filter element 30 of cellulose acetate or other suitable fibrous or foam material surrounded by tubular plastic sheath 32. The plastic sheath 32 may have grooves 34 extending only along one portion of the outer surface of that sheath or extending along its entire length. If ducts 34 are creeping along the entire length, sealing means must be provided to prevent smoke from entering the duct into these ducts or the sheath 32 will have a cross-sectional area large enough to cross the duct section so that ducts 34 will be open relative to the surrounding atmosphere. The tubular, plastic sheath 32 can be produced by any known method such as by extrusion.

Opisanom konstrukcijom filtera prema pronalasku se postiže da se ventilacioni vazduh i dim iz cigarete mešaju samo na izlaznom kraju filtera, pri čemu se dim koji izlazi iz filtera uglavnom odmah disperguje. Naime, čim dim izade iz filtera isti se momentalno disperguje i meša kako sa ventilacionim vazduhom,koji izlazi iz opisanih ventilacioni h kanala tako i sa okolnim vazduhom. Ovo mešanje omogučuje brzi kontakt jako razredenog dima sa receptorima ukusa u pušačevim ustima što omogučuje da se mnogo ne izgubi u ukusu dima i pored efikasnog smanjivanja količine štetnih materija u njemu.The described construction of the filter according to the invention makes it possible to mix the ventilation air and cigarette smoke only at the outlet end of the filter, whereby the smoke exiting the filter is generally dispersed immediately. Namely, as soon as the smoke exits the filter, it is immediately dispersed and mixed with both the ventilation air exiting the described ventilation ducts and the surrounding air. This mixing allows for rapid contact of highly diluted smoke with the taste receptors in the smoker's mouth, allowing much to be lost in the taste of the smoke, despite the effective reduction of the amount of harmful substances in it.

Da bi se postiglo ovo momentalno mešanje čim dim napusti filter potrebno je da filter konstruktivno bude takav da budu ispunjeni sledeči uslovi definisani sledečim odnosima:To achieve this instantaneous mixing as soon as the smoke leaves the filter it is necessary that the filter be structurally such that the following conditions defined by the following relations are fulfilled:

UA_f UA _f

K= —I— - A 100n ^v gde je K uvek veče od 0,035; A_y je površina poprečnog preseka pojedinačnog kanala 14,34; A_f je površina poprečnog preseka čitavog filtera; U je procenat ventilacionog vazduha u ukupnoj struji vazduha i dima koja izlazi iz filtera i odreden je jednačinomK = —I— - A 100n ^v where K is always greater than 0.035; A _y is the cross-sectional area of the individual channel 14.34; A _f is the cross-sectional area of the entire filter; U is the percentage of ventilation air in the total air flow and smoke exiting the filter and is determined by Eq.

100q_v 100q _v

U = -— q + q ^Mv ^HsU = -— q + q ^M in ^H s

- 6 u kojoj je q_v ukupna količina ventilacionog vazduha, a q$ je količina dima koja prolazi kroz filter; n je broj ventilacionih kanala i iznosi najmanje 3. Celishodno je da broj kanala bude 7 iii manji; ventilacioni vazduh iznosi 60 do 95 procenata od ukupne struje,koja se sastoji od tog vazduha i dima; srazmera površine poprečnog preseka pojedinačnog kanala i površine poprečnog preseka celog filtera (A_v/Af) treba da bude manja od 0,01 tako da se največ! deo dima disperguje unutar 1 cm (kod standardnih filtera 20 do 27 mm obima) od kraja filtera kada se dim vuče u količini od 15,5 cc/sec. Najbolje je da broj kanala bude 4 iii 5; ventilacioni vazduh če iznositi 65 do 90 procenata i najmanje 75 procenata dima če biti dispergovano unutar 1 cm od kraja filtera- 6 in which q _{v is the} total amount of ventilation air, aq $ is the amount of smoke passing through the filter; n is the number of ventilation ducts and is at least 3. It is advisable that the number of ducts be 7 or less; ventilation air accounts for 60 to 95 percent of the total electricity, consisting of that air and smoke; the ratio of the cross-sectional area of the single channel and the cross-sectional area of the whole filter (A _v / Af) should be less than 0.01 so that the maximum! the smoke portion disperses within 1 cm (with standard filters 20 to 27 mm in circumference) from the end of the filter when the smoke is drawn in an amount of 15.5 cc / sec. The number of channels is preferably 4 or 5; the ventilation air will be 65 to 90 percent and at least 75 percent of the smoke will be dispersed within 1 cm of the end of the filter

Sledeči primeri služe za bolje razumevanje pronalaska, a ne kao nejgovo ograničenje.The following examples serve to better understand the invention and not as a limitation thereof.

PRIMERI Ι-ΧΧΙΙΙEXAMPLES Ι-ΧΧΙΙΙ

Izvestan broj cigareta je napravljen uz koriščenje standardnog filterskog elementa od celuloznog acetata obima 24,6 mm i dužine 27 mm omotanog neporoznim papirnim omotačem proizvedenim od Schweitzer Division, Kimberly-Clark Corporation,koji se označava kao Tip 322. Odredeni broj kanala je napravljen na svakom filteru i zatim je pomoču završnog omotača filter spojen sa duvanskim stubom. Završni omotač je izveden sa ventilacionim otvorima povezanim sa kanal ima i količina ventilacionog vazduha se podešava promenama veličine i bro ja ventilacionih otvora. Cigarete su pušene u skladu sa prihvačenim metodom te stiranja od strane Federal Trade Commision.A number of cigarettes were made using a standard 24.6 mm cellulose acetate filter element wrapped in non-porous paper wrapper manufactured by Schweitzer Division, Kimberly-Clark Corporation, designated Type 322. A number of channels were made on each The filter is then connected to the tobacco pole by means of the end wrap. The end wrap is made with duct vents connected to the duct and the amount of ventilation air is adjusted by changing the size and number of vents. Cigarettes were smoked according to the accepted method of clearance by the Federal Trade Commision.

Rezultati su dati na sledečoj Tabeli 1:The results are given in the following Table 1:

TABELATABLE

1 n 1 n A ² VA ² V ^Af^{3 A} f ³ D⁴ D ⁴ K⁵ K ⁵ L⁶ ·L ⁶ · I I 1 1 .0025 .0025 .49 .49 65 65 .316 .316 II II 2 2 .0025 .0025 .49 .49 68 68 .164 .164 19.1 19.1 III III 3 3 .0025 .0025 .49 .49 68 68 .109 .109 16.3 16.3 IV IV 4 4 .0025 .0025 .49 .49 64 64 .076 .076 13.5 13.5 v v 5 5 .0025 .0025 .49 .49 67 67 .063 .063 11.2 11.2 VI VI 6 6 .0025 .0025 .49 .49 65 65 .051 .051 9.5 9.5 VII VII 7 7 .0025 .0025 .49 .49 65 65 .043 .043 8.3 . 8.3. VIII VIII 8 8 .0025 .0025 .49 .49 65 65 .037 .037 7.3' 7.3 ' IX IX 8 8 .0022 .0022 .50 .50 82 82 .049 .049 8.0 8.0 X X 31 31 .0004 .0004 .52 .52 65 65 .011 .011 4.9 4.9 XI XI 4 4 .0040 .0040 .48 .48 85 85 .098 .098 10.5 10.5 XII XII 4 4 .0040 .0040 .48 .48 80 80 .092 .092 10.5 10.5 XIII XIII 4 4 .0040 .0040 .48 .48 70 70 .080 .080 10.5 10.5 XIV XIV 4 4 .0040 .0040 .48 .48 60 60 .068 .068 10.5 10.5 XV XV 4 4 .0040 .0040 .48 .48 50 50 .056 .056 10.5 10.5 XVI XVI 4 4 .0028 .0028 .50 .50 73 73 .088 .088 12.9 12.9 XVII XVII 4 4 .0006 .0006 .52 .52 68 68 .088 .088 28.3 28.3 XVIII XVIII 4 4 .0014 .0014 .52 .52 79 79 .102 .102 18.9 18.9 XIX XIX 4 4 .0073 .0073 .49 .49 80 80 .091 .091 7.7 7.7 XX XX 4 4 .0061 .0061 .49 .49 67 67 .077 .077 8.5 8.5 XXI XXI 4 4 .0091 .0091 .50 .50 69 69 .077 .077 6.8 6.8 XXII XXII 4 4 .0102 .0102 .50 .50 72 72 .079 .079 6.5 6.5 XXIII XXIII 8 8 .0008 .0008 .51 .51 80 ' 80 ' .050 .050 13.4 13.4 1- Broj 1- Number kanala u filteru channels in the filter 2-Prosečna površina 2-Average area poprečnog transverse preseka section svakog each kanala u channels in kv.cm kv.cm

3.Površina poprečnog preseka filtera uključujuči i kanale u kv. cm.3. The cross-sectional area of the filter including the channels in kv. cm.

4-Procenat ventilacionog vazduha u ukupnoj struji, dima i vazduha4-Percentage of ventilation air in total electricity, smoke and air

10On10On

Prosečna razdaljina izmedu susednih kanala prosečni poluprečnik svakog kanalaAverage distance between adjacent channels is the average radius of each channel

Iz gornjih primera se vidi da u primerima III-VII, ΧΙ-ΧΙΙΙ i XVI-XVIII, uglavnom sav izlazeči dim biva dispergovan unutar 1 cm od izlaza iz filtera. U primerima VIII-X i ΧΙΧ-ΧΧΙΙΙ ventilacioni vazduh deluje kao omotač i obavija izlazni dim umesto da ga disperguje. U primerima XIV i XV je bilo nedovoljno vazduha da bi se dim dispergovao. Dalje, prilikom testiranja ukusa, cigarete iz primera III-VII, ΧΙ-ΧΙΙΙ i XVI-XVIII ispoljile su izuzetnu amplitudu ukusa dok je u ostalim primerima ukus bio pogoršan.U primerima I i II je vrlo mala disperzija dima i slab ukus. U prikazanim ostvarenjima pronalaska mogu biti vršene promene bez uticaja na suštinu pronalaska.The above examples show that in Examples III-VII, ΧΙ-ΧΙΙΙ and XVI-XVIII, generally all the exiting smoke is dispersed within 1 cm of the filter outlet. In Examples VIII-X and ΧΙΧ-ΧΧΙΙΙ, the ventilation air acts as a sheath and envelops the exhaust smoke instead of dispersing it. In examples XIV and XV there was not enough air to disperse the smoke. Furthermore, when testing the flavors, the cigarettes in Examples III-VII, ΧΙ-ΧΙΙΙ and XVI-XVIII exhibited remarkable amplitude of taste while in other examples the taste was impaired. Changes may be made to the embodiments of the invention disclosed without affecting the substance of the invention.

Claims (5)

Patentni zahteviPatent claims 1. Filter za cigarete koji obuhvata telo 2,6 filtera pričvrščeno za duvanski stub 3,7 cigarete , koje se sastoji od poroznog filterskog elementa 10,30 obavijenog neporoznim omotačem 12,32, naznačen time, što je tri do sedam ventilacionih kanala (14,34) izvedeno i rasporedeno na spoljnjoj površini tela (2,6) filtera i povezano sa ventilacionim otvorima (18,38) u završnom omotaču (16,36) , što su kanali (14,34) otvoreni na jednom svom kraju suprotnom duvanskom stubu (3,7) cigarete i što je srazmera prosečne površine poprečnog preseka pojedinačnih kanala (14,34) prema ukupnoj površini.poprečnog preseka tela (2,6) filtera manja od 0,01.Cigarette filter comprising a body of 2.6 filters attached to a tobacco stack 3.7 cigarettes, comprising a porous filter element 10.30 surrounded by a non-porous jacket 12.32, characterized in that there are three to seven ventilation ducts (14 , 34) constructed and arranged on the outer surface of the body (2,6) of the filter and connected to the ventilation openings (18,38) in the end sheath (16,36), the channels (14,34) being opened at one end opposite the tobacco the cigarette bar (3.7) and which is the ratio of the average cross-sectional area of the individual ducts (14.34) to the total surface area of the filter cross-section (2.6) of less than 0.01. 2. Filter prema zahtevu 1, naznačen time, što je obim tela (2,6) filtera od 20 do 27mmFilter according to claim 1, characterized in that the filter body volume (2,6) is from 20 to 27mm 3. Filter prema zahtevu 1, naznačen time, što su kanali (14,34) simetrično rasporedeni oko tela (2,6) filtera.A filter according to claim 1, characterized in that the channels (14,34) are arranged symmetrically around the body (2,6) of the filter. 4. Filter prema zahtevu 1, naznačen time, što su centri susednih kanala (14,34) na rastojanju jednakom najmanje osmostrukom poluprečniku pojedinačnog kanala (14,34).4. The filter of claim 1, wherein the centers of adjacent channels (14,34) are at a distance equal to at least eightfold the radius of the individual channel (14,34). 5. Filter prema zahtevu 1, naznačen time, što su kanali (14,34) polukružni.5. The filter according to claim 1, wherein the channels (14,34) are semicircular. Brown & Milliamson Tobacco CorporationBrown & Milliamson Tobacco Corporation