SI8711555A8

SI8711555A8 - Cigarette filter

Info

Publication number: SI8711555A8
Application number: SI8711555A
Authority: SI
Inventors: G Charles Lamb; Andrew Mcmurtrie
Original assignee: Brown & Williamson Tobacco
Priority date: 1986-08-25
Filing date: 1987-08-21
Publication date: 1997-06-30
Also published as: HRP930453A2; HRP930453B1

Description

Področje tehnike, v katero spada izumFIELD OF THE INVENTION

Izum se nanaša na filter za cigareto. Posvoji obliki izvedbe se nanaša na filter z novim razporedom ventilacijskega zraka in na drugo obliko izvedbe, na cigaretni filter z izoblikovanimi žlebiči za strujanje ventilacijskega zraka od ustnika filtra pod določenimi kadilskimi pogoji, pri čemer se z zrakom razredčeni filtrirani dim skozi filter vodi v ustnik filtra, in pod drugimi kadilskimi pogoji za vodenje vsaj enega dela ventilacijskega zraka od žlebičev v filter, da se preden doseže ustnik filtra pomeša v filtru z dimom in ga še dodatno razredči.The invention relates to a cigarette filter. Adopted version refers to a filter with a new arrangement of ventilation air and another embodiment, to a cigarette filter with shaped grooves for flowing ventilation air from the filter mouth under certain smoking conditions, whereby the diluted filtered smoke is passed through the filter to the filter mouth. , and, under other smoking conditions, to run at least one portion of the venting air from the grooves into the filter so that it is mixed with the smoke filter and further diluted before it reaches the filter mouthpiece.

Tehnični problemA technical problem

V tehniki je dobro znano, da se cigaretam dodaje filter, pri čemer so filtri opremljeni z novo razporeditvijo ventilacijskega zraka, da bi v filter prišel okološni zrak za razredčenje dima, ki struji skozenj. V razredčenem dimu se zmanjša količina dimnih delcev, kakor tudi sestavnih delov plinske faze, ki se dovajajo v kadilčeva usta. Bilo je predlaganih že veliko naprav in se tudi uporabljajo, da bi vodile ventilacijski zrak v cigareto.It is well known in the art that a filter is added to the cigarettes and the filters are equipped with a new arrangement of ventilation air to allow ambient smoke to flow through the filter into the filter. Diluted smoke reduces the amount of flue gas as well as the components of the gas phase that are introduced into the smoker's mouth. Many devices have already been proposed and are also being used to drive ventilation air into a cigarette.

-2Stanje tehnike-2. State of the art

N.pr. je lahko ovoj za tobak cigarete izdelan iz poroznega materiala, ki omogoča dovajanje zraka vzdolž celotne dolžine cigarete, kjer se pomeša s dimom, ki struja skoznjo, in ga tako razredči. Cigaretni ovoj je lahko tudi na ozbranih mestih vzdolž cigarete perforiran in tako nastanejo v cigareti odprtine, skozi katere priteka ventilacijski zrak. Dalje je znano, da se filterski ovoj cigarete perforira zato, da pride ventilacijski zrak v filter in tako razredči dim, ki struja skozi filter. Razen tega obstaja veliko predlogov, da se v filtru cigarete napravi žlebiče in tako olajša dovod ventilacijskega zraka v dimni tok.E.g. the cigarette tobacco wrapper can be made of a porous material that allows air to be supplied along the entire length of the cigarette, where it is mixed with the smoke that flows through it, thus diluting it. Cigarette wrappers can also be perforated at the places selected along the cigarette, thus forming holes in the cigarette through which ventilation air flows. It is further known that the filter casing of a cigarette is perforated to allow ventilation air to flow into the filter and thus dilute the smoke that flows through the filter. In addition, there are many proposals to make grooves in the cigarette filter to facilitate the supply of ventilation air to the flue.

N.pr. patent ZDA št.3 596 663 se nanaša na filter za cigaretni dim, ki je opremljen z valovitim, poroznim tesnilnim ovojem, ki ovija filterski element in ta ovoj je obdan z papiijem za ustnik s perforacijami za strujanje zraka. Ventilacijski zrak vstopa skozi perforacije v papiiju za ustnik v filterski element in žlebiče ter struja h kadilčevim ustom.. ZDA patent št 40256 122 odkriva cigaretni filter z žlebiči, ki se raztezajo vzdolž zunanje površine filterske paličice, ki jo obdaja neporozno tesnilni ovoj. Paličica in ovoj pa sta obdana z ventilirajočim papiijem za ustnik, tako da pri kajenju struja samo ventilacijski zrak vzdolž žlebičev in skozi filter samo dim. Drugi patenti, ki se nanašajo na žlebiče, okoli filterskega elementa za dovod ventilacijskega zraka v cigaretni filter, so zajeti v ZDA v patentih št.3 577 995, št.3 752 347, št.3 490 461, št.3 788 330, št.3 773 053, št.3 752 165, št.3 638 661, št.3 608 561, št.3 910 288 in št.3 256 122.E.g. US Patent No. 3,696,663 relates to a cigarette smoke filter provided with a corrugated, porous sealing envelope that wraps the filter element and is enclosed by a mouthpiece with perforations for airflow. Ventilation air enters through the perforations of the mouthpiece into the filter element and the grooves and the current to the smoker's mouth. U.S. Patent No. 40256 122 detects a cigarette filter with grooves extending along the outer surface of the filter rod surrounded by a non-porous sealing sleeve. However, the rod and the wrapper are surrounded by a ventilating mouthpiece so that when smoking, only the ventilation air flows along the grooves and through the filter only smoke. Other patents relating to grooves around a filter element for supplying ventilation air to a cigarette filter are covered in the United States in Patents Nos. 3 577 995, No. 3 752 347, No. 3 490 461, No. 3 788 330, No.3 773 053, No.3 752 165, No.3 638 661, No.3 608 561, No.3 910 288 and No.3 256 122.

Opis rešitve tehničnega problema s primeri izvedbe in seznamom slikDescription of a solution to a technical problem with examples of implementation and a list of images

Izum obravnava enostavno in ugodno strukturo filtera za cigareto, po katerem dosežemo v bistvu normalni, več ali manj učinkoviti padec tlaka v cigareti.The invention relates to a simple and advantageous structure of a cigarette filter whereby a substantially normal, more or less effective drop in cigarette pressure is achieved.

-3Razen tega tak cigaretni filter vsebuje manj katrana, pretežno zaradi ventilacije in istočasnega filtriranja cigaretnega dima razredčenega z zrakom. Dalje dobimo po tem izumu nažlebljeni cigaretni filter z izpusti za strujanje zraka, pri čemer so pod določenimi pogoji predvidena zračna strujanja, ki vodijo v filter na stranicah žlebičev in pa na izbranih mestih na zunanji površini filtra zunaj žlebičev.-3 Moreover, such a cigarette filter contains less tar, mainly due to ventilation and simultaneous filtration of the cigarette smoke diluted with air. Further, according to the present invention, a grooved cigarette filter with airflow discharges is obtained, whereby, under certain conditions, airflows are provided which lead to the filter on the sides of the grooves and at selected locations on the outer surface of the filter outside the grooves.

Predvsem pa izum predstavlja cigaretni filter, ki je značilen po porozni filterski paličivi valjaste oblike, po ovoju, kije nepropusten za zrak in sega vzdolž filterske paličice od enega do drugega konca ter ovija filtersko paličico, pri čemer pa ostaneta nasprotna konca filterske paličice prosta; ovoj je sestavljen iz številnih žlebičev, vstavljenih v filtersko paličico, vsak žlebič pa je na enem koncu filterske paličice odprt in se tu razteza vglavnem vzdolž filterske paličice po dolžini, kije manjša od dolžine filterske paličice; po materialu za ustnik, ki sega vzdolž ovite filterske paličice in jo ovija; po prvih perforacijah za strujanje, narejenih skozi material za ustnik proti žlebičem odprte in z njim povezane, daje mogoče strujanje zraka v žlebiče in so tako dimenzionirane, da zrak s prvim vnaprej izbranim padcem tlaka struja skozinjein v žlebiče; po drugih perforacijah za strujanje zraka, ki so narejene v vnaprej izbranem območju zunaj žlebičev in gredo skozi material za ustnik in ovoj, da omogočijo strujanje zraka v porozno filtersko paličico in so tako dimenzionirane, da zrak z drugim vnaprej izbranim padcem tlaka, kije višji kot prvi izbrani padec tlaka, struji skozi nje; po tretjih perforacijah za strujanje zraka, narejenih v vsakem žlebiču skozi ovoj, da lahko struja zrak od žlebičev v porozno filtersko paličico in so tako dimenzionirane, da skozi nje struja zrak s tretjim vnaprej izbranim padcem tlaka, ki je višji od drugega vnaprej izbranega padca tlaka.Above all, the invention is a cigarette filter, characterized by a porous cylindrical filter rod having an airtight envelope extending along the filter rod from one end to the other and wrapping the filter rod while keeping the opposite ends of the filter rod free; the wrapper consists of a number of grooves inserted into the filter rod, each groove open at one end of the filter rod and extending therein along the filter rod for a length less than the length of the filter rod; by mouthpiece material extending along the wrapped filter rod and wrapping it; after the first perforations for the flow made through the mouthpiece material against the grooves open and connected thereto, airflow into the grooves is possible and is dimensioned such that air with the first pre-selected pressure drop flows through the grooves; by other airflow perforations made in a predetermined area outside the grooves and passing through the mouthpiece and jacket material to allow air to flow into the porous filter rod and dimensioned so that the air with a second pre-selected pressure drop is higher than the first pressure drop selected, flows through it; by third air perforations made in each groove through the sheath so that air can flow from the grooves into the porous filter rod and is dimensioned such that air is flowing through it with a third pre-selected pressure drop higher than the second pre-selected pressure drop .

Niže opisan izum, kjer se sklicujemo na načrt, v katerem se navedeni referenčni vedno nanašajo na enake dele.The invention described below, with reference to a plan in which said references always refer to equal parts.

-4Prikazanje:-4Show:

sl. 1 perspektivni prikaz primera ugodne izvedbe cigaretnega filtra po tem izumu, sl. 2 perspektivni prikaz filtra, nameščenega na tobačni paličici po sl. 1, pri čemer pe je material za ustnik deloma odvit, zaradi jasnejše predstavitve podrobnosti, in sl. 3 prerez filtra, gledano v smeri puščice 3-3 na sl. 1.FIG. 1 is a perspective view of an exemplary embodiment of a cigarette filter according to the present invention; 2 is a perspective view of a filter mounted on a tobacco rod according to FIG. 1, whereby the mouthpiece material is partially unscrewed to provide a clearer presentation of the details, and FIG. 3 is a sectional view of the filter in the direction of arrow 3-3 in FIG. 1.

Slike 1, 2 in 3 ponazarjajo s splošnim ref. znakom 10 označen cigaretni filter, ki kaže karakteristike tega izuma. Cigaretni filter 10 obsega na splošno valjasto izoblikovano filtersko paličico 12 in ovoj 14, kije nepropusten za zrak. Ta ovoj se razteza vzdolž filterske paličice 12 od enega konca 16 do drugega konca 18, tako da sta konca filterske paličice 16 in 18 v nasprotnem razmerju strujanja.Figures 1, 2 and 3 illustrate with a general ref. 10 indicates a cigarette filter showing the characteristics of the present invention. The cigarette filter 10 comprises a generally cylindrical shaped filter rod 12 and an airtight jacket 14. This wrapper extends along the filter rod 12 from one end 16 to the other end 18 so that the ends of the filter rod 16 and 18 are in the opposite flow ratio.

Filterska paličica 12 je izdelana iz poroznega, n.pr, iz vlaknastega ali penastega celuloznega acetata ali kake druge snovi, kije primerna za filtriranje cigaretnega dima.The filter rod 12 is made of porous, e.g., fibrous or foamy cellulose acetate or any other substance suitable for filtering cigarette smoke.

Cigaretni filter 10 obsega še številne žlebiče 20, ki so izdelani v ovoju 14 in vstavljeni v filtersko paličico 12. Vsak žlebič 20, kot je označeno z ref. znakom 20, je na ustnem koncu filterske paličice 12 odprt in se razteza od tu vzdolž filterske paličice v razdalji, kije krajša od dolžine filterske paličice 12. Sl. 1,2 in 3 prikazujejo 4 take žlebiče 20, ki so v enakih razmikih razporejeni na obodu filterske paličice 20.The cigarette filter 10 also comprises a number of grooves 20 made in the sheath 14 and inserted into the filter rod 12. Each groove 20 as indicated by ref. 20, at the mouth of the filter rod 12 is open and extends from here along the filter rod at a distance shorter than the length of the filter rod 12. FIG. 1,2 and 3 show 4 such grooves 20 arranged at regular intervals at the circumference of the filter rod 20.

-5Pri izdelavi cigarete 10 je ovoj 14 lahko izdelan skupaj s filtersko paličico 12 kot en del ali pa kot ločen element. Ovito filtersko paličico 12 lahko n. pr. položimo v model v drugo obdelovalno napravo, da ovoj 14 na izbranih mestih vtisnemo in nato vstavimo f filtersko paličico 12 in oblikujemo žlebiče 20. Takšen postopek se v industriji za proizvodnjo cigaret običajno imenuje toplna obdelovalna tehnika.-5When making a cigarette 10, the wrapper 14 may be made together with the filter rod 12 as a single piece or as a separate element. The wrapped filter rod 12 can be n. BC put in a model in a second machining device to imprint the wrapper 14 at the selected locations and then insert the f filter rod 12 and form grooves 20. Such a process is commonly referred to as the thermal processing technique in the cigarette manufacturing industry.

Kot je najbolje razvidno iz sl. 2, je filterska paličica 12 pritijena na tobačni stebriček 24 skupaj z materialom za ustnik 26, ki obdaja ovito filtersko paličico 12, in tako je izoblikovana filter cigareta 28. Prva stopnja za strujanje zraka, kot so prve perforacije za strujanje zraka 30 so izdelane na obodu okoli filterske paličice 12 in segajo skozi material za ustnik. Prve perforacije 30 so narejene bliže zaprtih koncev žlebičev 20 kot pa na njihovih odprtih koncih.As best illustrated in FIG. 2, the filter rod 12 is attached to the tobacco pole 24 together with the mouthpiece material 26 surrounding the wrapped filter rod 12, thus forming a cigarette filter 28. The first stage for airflow, such as the first airflow perforations 30, are made at the circumference around filter rod 12 and extend through the mouthpiece material. The first perforations 30 are made closer to the closed ends of the grooves 20 than to their open ends.

Prve perforacije 30 so predvsem ravno razporejene v navzdolnjem strujanju zaprtih koncev žlebičev 20, t.j. tistih koncev žlebičev, katerih odprti konci 22 ležijo nasproti ustnega konca 16 filterske paličice 12. Predvsem so prve majhne pretočne perforacije 30 za ventilacijski zrak z žlebičem 20, blizu svojih zaprtih koncev odprte in so z njimi povezane, daje omogočen vtok zraka v žlebiče 20. Prve perforacije za strujanje zraka so tako dimenzionirane, da zrak s prvim vnaprej izbranim padcem tlaka struja skozi nje.The first perforations 30 are mainly planarly arranged in the downstream flow of the closed ends of the grooves 20, i.e. those ends of the grooves whose open ends 22 lie opposite the mouth end 16 of the filter rod 12. In particular, the first small flow perforations 30 for the ventilation air with the groove 20 are open and connected to their closed ends to allow air to flow into the grooves 20. The first airflow perforations are so dimensioned that the air with the first pre-selected pressure drop flows through it.

Ovoj 14 je narejen z drugim razporedom za strujanje zraka, kot so druge perforacije za strujanje zraka 32, skozi material za ustnik 26 in ovoj 14 v prvem vnaprej izbranem območju zunaj žlebičev, da lahko zrak priteka skozi porozno filtersko paličico 12. Druge perforacije za strujanje zraka 32, so, kot je prikazano, razporejene v strujanju zaprtih koncev žlebičev 20 okoli obodaThe sheath 14 is made with a second airflow arrangement, such as other airflow perforations 32, through the mouthpiece material 26 and the sheath 14 in the first pre-selected area outside the grooves to allow air to flow through the porous filter rod 12. Other flow perforations 32, as shown, are arranged in the flow of the closed ends of the grooves 20 around the circumference

-6filterske paličice 12. Druge perforacije 32 so tako dimenzionirane, da skozi nje struja zrak z drugim vnaprej izbranim padcem tlaka, kije višji kot prvi vnaprej izbrani padec tlaka.-6filter rods 12. The other perforations 32 are dimensioned such that air flows through it with a second pre-selected pressure drop higher than the first pre-selected pressure drop.

Ovoj 14 kaže v vnaprej izbranem območju v žlebičih 20 tretji razpored za strujanje, kije propusten za zrak, kot so majhne perforacije za pretok zraka 34, ki so narejene v vsakem žlebiču 20 skozi debelino ovoja 14 in omogočajo, da teče zrak od žlebičev v porozno filtersko paličico 12. Tretje perforacije 34 so razporejene bliže odprtih kot zaprtih koncev žlebičev 20. Predvsem pa so tretje perforacije 34 blizu odprtih koncev 22 žlebičev 20. Tretje perforacije so tako dimenzionirane, da skozi nje struja zrak s tretjim vnaprej izbranim padcem tlaka, ki je višji kot drugi vnaprej izbrani padec tlaka.The sheath 14 shows in the pre-selected area in the grooves 20 a third air-permeable flow pattern, such as small airflow perforations 34 made in each groove 20 through the thickness of the groove 14 and allowing air to flow from the grooves to the porous filter rod 12. The third perforations 34 are arranged closer to the open than the closed ends of the grooves 20. Above all, the third perforations 34 are located near the open ends 22 of the grooves 20. The third perforations are dimensioned such that air flows through it with a third pre-selected pressure drop, which is higher than the second pre-selected pressure drop.

Ugotovljeno je bilo, da pri običajno dimenzioniranih cigaretnih filtrih, ki imajo značilen premer ca 8 mm, dobro deluje prva perforacija 30 s premerom 1/2 mm, druga perforacija 32 s premerom 1/2 mm in tretja perforacija 34 s premerom 3/8 mm, da se doseže potrebne diferencialne vrednosti padca tlaka med prvimi, drugimi in tretjimi perforacijami 30, 32 in 34. Dalje je bilo ugotovljeno, daje koristno razporediti prve perforacije 30 v oddaljenosti od 2 mm do 4 mm od zaprtih koncih žlebičev 20 in tretje perforacije 34 v oddaljenosti ca 2 mm in ca 4 mm od odprtih koncev žlebičev 20.It has been found that for generally sized cigarette filters having a typical diameter of about 8 mm, the first perforation 30 with 1/2 mm diameter, the second perforation 32 with 1/2 mm diameter, and the third perforation 34 with 3/8 mm diameter, work well. to obtain the necessary differential pressure drop values between the first, second and third perforations 30, 32 and 34. It was further found useful to distribute the first perforations 30 within a distance of 2 mm to 4 mm from the closed ends of the grooves 20 and the third perforations 34 at a distance of ca 2 mm and ca 4 mm from the open ends of the grooves 20.

Kot je najbolje razvidno iz sl. 3, struja pri kajenju pod določenimi pogoji, pri katerih so žlebiči 20 neodprti, glavni del ventilacijskega zraka skozi prve perforacije 30 v žlebiče 20, vzdolž the žlebičev 20 in iz njihovih odprtih koncev 22 v usta kadilca. Zelo malo ventilacijskega zraka, ali pa nič, teče skozi druge in tretje perforacije 32 in 34, ker je padec tlaka v the perforacijah 32 in 34 bistvenoAs best illustrated in FIG. 3, smoking current under certain conditions in which the grooves 20 are unopened, the main part of the ventilation air through the first perforations 30 into the grooves 20, along the grooves 20 and from their open ends 22 into the mouth of the smoker. Very little or no ventilation air flows through the second and third perforations 32 and 34 because the pressure drop in the perforations 32 and 34 is essential

-Ίvišji kot padec tlaka v prvih perforacijah 30 in vzdolž žlebičev 20 do njihovih odprtih koncev 22. Če se žlebiči 20 zamašijo, n. pr. na njihovih odprtih koncih 22, tako da v njih nastane višji padec tlaka, potem strujajo večje količine ventilacijskega zraka skozi druge perforacije 32 kakor tudi od žlebičev 20 skozi perforacije 34 v filtersko paličico 12.- Higher than the pressure drop in the first perforations 30 and along the grooves 20 to their open ends 22. If the grooves 20 become clogged, n. BC at their open ends 22 so that they produce a higher pressure drop, then larger amounts of ventilation air flow through the other perforations 32 as well as from the grooves 20 through the perforations 34 into the filter rod 12.

Zgornji podrobni opis je v glavnem podan za razumevanje; iz njega naj se ne izpeljujejo nepotrebne omejitve, ker se bodo strokovnjaku pri branju tega izuma spremembe zdele očitne in izvedljive, ne da bi odstopil od zamisli izuma in priloženih patentnih zahtev, ki naj se zaščitijo.The above detailed description is mainly given for understanding; unnecessary limitations should not be derived therefrom, since to the person skilled in the art of reading this invention, the changes will appear obvious and practicable without departing from the concept of the invention and the accompanying claims to be protected.

Claims

PATENT APPLICATIONS

Cigarette filter, characterized in that it has a porous cylindrical filter rod (12) around which there is a sealed wrapper (14) extending from one end (16) to the other end (18) of the filter rod (12), that a number of grooves (20) are mounted on the sheath, attached to the filter rods (12), each groove (20) having an opening (22) at one end (16) of the filter rod (12) and at the other end (18) is pressed in place before the end of the filter rod (12), a mouthpiece (26) is mounted around the filter rod (12), in which the flow perforations (30) are placed above the groove (20) and that other flow perforations (32) are mounted in the space between the end of the grooves (20) and the end of the filter rod (12), through the mouthpiece (26) and through the sheath (14), and that third flow perforations (34) are provided in the bottom of each groove (20) through the sheath (14) ) to a porous filter rod (12).

Filter according to claim 1, characterized in that the first flow perforations (30) are located closer to the closed end of the grooves (20) than to their openings (22).

Filter according to claim 1 and 2, characterized in that the third flow perforations (34) are positioned closer to the openings (22) of the grooves (20) than their closed ends.

for Brown + Williamson Tobacco