Europaisches Paientamt European Patent Omica 0 290 911 jo '.)~ Office europ‚en cles brevets A2 3 EUROPEAN PATENT APPLICATION Appitcation nurnUer~ 88107022-1 'I'D int (-,;' A24D 1 00 -'24D1 02 0,1[o of filitig: 02.05.88 pli; t! :-";!f Prit~tity: 15.05.87 US 51104 Aprliczol. R.J. RL:YNOLL)S -.u3ACCO COMPANY ,Dl Date of publication of application: 401 North Idlain SIrL-et 17.11.88 Bulletin 8&46 Winsiun-Sateni Noith Cirolini 27,02(US) Des,qnaled coiitracitiig Siates: Peitetti. Thomas A;.Ijeft AT BE CH DE ES FR G3 GR IT LI LU NLSE 2116 Newcastle Di ive Win-%.ori-Salem North Carcilina 27103(UG) 1v~"ffl-jt. Norman, Alati E)Cn~an 8184 I;teeplechise Circle CJeminorS North Carolina 21012:US) Invenlor: Oube, hlichiel FrŒiri;~i5 .&0 œ:Jgie crest Dti-e blorth Czrodin;j ,7rj4o(U;) Hoeger. Steli,-?clit & Partner Uhlaincistrasse 14c 0-700ri Stuttgart l(CE) I Smoking article. ID Cigaitilles having low elliciericy filters, rods of cut lillor having a tom packing density. :incl paper toaps having a high net perriviabiliLios and low in- lt,.,rpr,t peirneabilitius can yield goud tasio. low jas priaSe mainstrAam deliveries as ve[I -as to, nunutims ol visiblo 5sclesirown sinoke. Typiczl ciovet-,c~; 1!:jvo irialively laige amounts of volurne expanded lluu- cuied tobacco materials as cut Filial. parer wraos corilaininq magnesium oxide 3rd.~or inziejnr)~;,wr, iiy- C.4droxwe. arid talatively hign levels of la dilution. *1 < 30 X"'-. 10 40 50 I-- C14 UJI 35 45 25 15 20 FIG. I Xe'M Copy Co-,,q 110 0% CN BATCo document for Legal Services : Health Canada 18 October 1999 1 0 220 911 11 5410KINQ ARTICLE provided in [lie Peril)her7 Of !r1o mOulliend te(pon 2ACX(3R0l.J1I`;D C,= 7HE INVENTION thereof. or have filter elements highly etlicient [or the removal of "tar" anrl ni=ine from !he main. stream aerosol: In general- :ne perCeivea taste or 'he present rivermon rplales to smoking arti- 5 Strength of the Cigarettes -Vassi!jeo as naving lower -tar- and nicotine are orogressw6ty :ess ,les Such as cigarettes. and in particular to C:,,3a- levels of relies wilch generate low amounts of vjS:bIe (hail that of the Cigarettes Nnich are :lasstfieo as :iuc~'ttcam smoke approLIChing (119 CnaraCj-3riSIiCS Of the -fulf llavo(- Poi.)ular smokiog articles Such as Cigarettes Cigarettes. have a substantially Cylindrical rod ShaPELJ S;rUC- 10 Recently. consumers of -igarettes nave !ended lure and mr-Itice a charge of smokable material to demand an increased selection of jarious -uif such as shrreddec tobacco (ag cut filler) surround- flavor low tar" and "ultra low tar' cigaistles. Surn ad by a paper -rac-per thereby forming a so-called cigarettes have flavor patterns whicn are milder -tobacco rod.- Certain commercially available C;ga- than those flavor patterns characteristic of either reties have cut filler which comprises a major is 'full flavor' cigarettes or cigarettes which were amount or a total amount of Ilue-cured tobacco marketed in the past. However. the presently popu- inalertal. 011-3n. the use of low nitrogen content cut tar lower "tar" cigarettes have achieved consumer filter materials is oesirable in order to achieve Cer- acceptance because the taste and smoking set- lain smoking characterr s tics. It has become desir- isfaction provided by such cigarettes have re- able to manufacture Cigarettes having cylindrical 20 mained high. In addition. certain consumers have filler elements aligned in an and-to-and relationship indicated a desire to decrease the levels of visible with the tobact:o rod. Typically, filter elements are sidestream smoke generated by their cigarettes. manufactured from fibrous materials such as cel- U.S. Patent No. 4,637.410 lo Luke proooses a lulose acetate and plug wrap. and are attached to cigarette having a circumference of from 10 mm to the tobacco rod using a circumscribing tipcing ma- 25 19 mm. At col. 2. lines 5-7 of the reference. it is terial. disclosed that the proposed cigarettes exhibit lower Cigarettes are employed by the user by burn- smoke component mainstream and sijestream do- ing one end thereof. The user then receives main- liveries. stream smoke into histher mouth by drawing on the U,S, Patent No. 4.624.268 to Baker et al pro- opposite ond leg the filler end) of the cigarette. 30 poses a cigarette having wrapper paper with an During the time that the cigarette is not being inherent air permeability of 3 to 45 COFIESTA. For otawn upon by the user, it remains burning, and example. the wrapper paper is disclosed as having sidestream smoke can be generated. Sidostrearn a coating of starch. aluminum oxide. magnesium smoke is smoke which directly enters the almo- oxide. calcium oxide. sodium formater and sodium sphere during the static burn period of a smoking 35 acetate. See Col. 3. lines 23-37. However. such a article. Sidestrearn smoke diffuses into the atmo- cigarette would be expected 10 yield mainstream sphere, and The characteristic visible nature thereof smoke having a relatively high gas phase content. may be perceived negatively by certain individuals. Certain references suggest that certain gases i lie so called -full flavor" cigarettes have been can be removed from the mainstream smoke of popular smoking articles which defiver a desirable 40 cigarettes. For example. Avedikian in U.S. Patent tobacco taste. flavor and satisfaction to Me smoker. No. 3,368.556 proposes a cigarette having a plural- Typically, the "lull flavor" cigarettes deliver about ily of short filters which individually contain certain 14 mg or more of FTC *lfar" por cigarette. Ciga- substances for the supposed removal of various relies also can bo classified as *ruil flavor low far* substances from mainstream cigarette smoke. An- cigarettes. Typically. the -full flavor low tar' ciga- 45 other cigarette having a less complicated filler de- rettes deliver from about 8 to about 14 mg of FTC sign than that design proposed by Avedikian is 'tar- per cigarette, as woll as lower lovels of FTC proposed by Brooks in U.S. Patent No. 4.481.960. nicotine as compared to "full flavor" cigarettes. Yet Although Brooks proposes a cigarette) having (i) a another classification of popular cigarettes is the paper wrap with the possibility of a wide range of 'tiltra low tar* Cigarette which delivers still lower so air permeability. and Iii) air dilution such that the levels of FTC "far" and necoline. Typically. the Vield of mainstream carbon monoxide is relatively *ultra low far' cioatettes deliver less than about 7 low. the reference does not address a cigarotto mr; of FTC 'far' per cirlarotte. The *full flavor low yielding a low level of visible stdestroam smoke. ZI:- lar- and -Wrra to- tar" cigarettes conventionally U.S. Patent Nos. 4.231.377 to Clino of at. have air dilution means such as laser porlorations 4.420.002 to Cline. and 4.450.847 to Owens pro- C) 2 r_j V_ t . j., I---= 114 BATCo document for Legal Services: Health Canada 18 October 1999 4 0 290 911 ~~,)S- Wal :,,;atetle caoer -accers coniamwq maq- paracie 3iniensions. Cenliguration SMOKaotp :o:et nesium 3~.,a ano or marnesiurn nyarc,loe materi- triateftal and F"iC -,5(m Similarly manuttC. als call be used -ti ottier to manufacium cigarettes fused using a --onventicnat crqarelte Paper Ntar_ wtucri i4eld re~;ucecf visible ssceslrearn smoke dut- Examples cl convenoorial :igarelfte paper mracs trig Statil: burn periods. However. sucn low per- 5 are manufactured from flax liter and C31CIUrn -:3(- meaoil.ty paper wrappers can tend to provice an L)onale filler. have wrapper cermeabiaties retNeen off-taste to mainstream Smoke or an undesirabte, 20 and 120 cm min and oasis meightS of 20 io 20 aioma to sidesirearn smoki). 3 rn . See. Ourocner Re~. Ariv Too Sci Vol 10. it would be desirable for the cigarett,3, manufac- pp.52-71 (1964) and Samiad. T.-n Aur Int'l luter to picivilie a good tasting cigatette which '0 5 82, pp. 390-394 fIL)82), ineets the liesires arid demands of ceilain smokers or groups of smokers. In particular. it would be desirable to provide a good tasting cigarette which BRIEF DESCRIPTION OF THE DRAWINGS delivers the characteristic mild taste of low "tar" cigarettes. provides good smoking satisfaction. pro- 'S vides low mainstream gas phase clefiveries, and Figure I is a longitudinal sectional view of an which generates low levels of visible sidestream embodiment of this invention: and smoke. Figure 2 is a diagrammatic illustration of the type of wrapping material which Can be employed a to provide the smokable rod of the article of this S(JMMARY OF THE INVENTION invention. The present invention rolalos to a smoking DETAILED DESCRIPTION OF THE PREFERRED aiticle which delivers good tobacco taste and sat- 25 EMBODIMENTS istaction. Such cigarettes also ate capable of de- livering relatively low levels of FTC "tat " in com- bination with relatively to- 4evels of carb in monox- One emlioclimon; of a smoking article of this ido and other gaseous components. In addition, invention is shown in Figure I and has the form of such cigarettes generate relatively low levels of 30 a cigarette 10. The cigarette includes a generally visible sidestrearn smoke. cylindrical rod 15 of filler mriterial 20 contained in Cigarettes of this invention include a rod of circumscribing wrapping material 25. The roti 15 is filler material contained in a circumscribing wrap- conveniently referred lo as a "smokable rod' or a ping material. The majority of tho filler material "tobacco rod.' The ends of the tobacco rod air., preferably is flue-curod toUacco of some form. and 35 open to expose the filler material. the fillor material has a to- packing density within The cigarette 10 also includes a filler element Itie rod. The wrapping material is highly permeable 30 or other suitable mouthpiece positioned actla- and has a relatively slow Ourn rate. In particular. can( one and of the tobacco rod 15 such that tho the wrapping material has a relatively low inherent filler element and tobacco rod are axially aligned in :permeability and a relatively high not permeabilil~. ,0 an end-to-end relationship. p;eferably abutting one Preferably. the wrapping material includes at least another. Filler element 30 has a generally cylin- one inorganic c:cjde an(I-or inorganic hydroxide drical shape. and the diameter thereof is essentially contained [herein. The cigarette also inctudes a low equal to the diameter of the lot)acco rod. The ends efficiency filter means at one end Jh(-reof. and of the filter element are open to permit the passage preferably a means for providing air dilution there- is. of air and smoke therethrough. The filler element to Alternatively. the cigarette has a mouthpiece 30 includes filter material 35 which is overw(appqJ equippi.41 with means lor providing air dilution to along the longitudinally extending Surface theteof 1110 C1039121110. with circumscribing plug wrap material 40. The wrapping material is perforated enough to The filter element 30 is attached to the tobacco pitivide a cigarette which can deliver good lasting 50 rod 15 by tipping material 45 which circumscrities mainstream aerosol. However. the level of perfoia- both the entire length of the filter element and all lion is not so great that the air dilution provided adjacent region of the tobacco rod. The inner sur- thereby lo~nrs the delivered taste 10 an undesir- face of the tipping material 45 is fixedly secured to ably low level. The slow burning nature of the the outer surface of the plug wrap 40 and the outer I wrapping ini(ertal is typically such that a cigarette 65 surface of the wrapping material 25 of the tobacco manulac:ured therewith burns at a rate such that rod. using a suitable adhesive. A ventilated or air the cigarette yields 1rurn I to 2 more pulls under diluted smoking article is provided with an air dilu. FTC smoking conditions than a cigaratt.) of com- tion means such as a series of perforations 50 CD 3 1.0 C)~ BATCo document for Legal Services : Health Canada 18 October 1999 5 0 200 911 ,j.,1,:n .,t no,t) ~-t-~ruj -irougo i:,.,) !,ppinq -naterial i)e a simpio notto- iuor- cf :aper -.r eq 311,1 pi.'.) ~,ap. po~y;~lhileruy or thi) Itkel 10 mticli lie air islutsun Referring to Figures I ano 2. Ine -Nraoping can ce provll~ed by the adol,10f) ')I holes. -.1its. or material 25 has a math -.v (snown in Figure 2) the we Such a mouinpiece can provide nigh !evets Nkich is equal to the circumleicrice -)I the cigarette 5 of at( citlutton to [he mainstream ae(csol vilnout j)ius the fact -,one of wo glue line which ultiinaleiy h1tralion A the smrke 1,y a 'ilter material suc.1i as o-suits oucing cigarette manulacme. The wraoptng cellulose acetate. . material 25 includes a series of perforations 60 The filter mater-ai ampioyeei r, lh-a manufacture wtucii extend in a linear !ashion along [he li:ingiludi- of the smokable rod can ac/ in .-.rrer to )rye a nal lenrjth of thereof. Alleinativoly. other configufa- 10 smokable rod of relatively o- oacxinq aensil-I lions such as a random perforation pattern can be Normally, the majority 0( the 'ill,)f material present provided. The Size. num0er and relalive positioning in the Smokable rod is flue-careo lobacco material of the individual perforations 60 can vary depend- of some form. The flue-cured tobacco material can icig uoon the desired characteristics of the cigarette be blended with other tot)ac::o materials. Such as wnich has the wrapping material incorporated Is the Oriental tooaccos~ as well as !onacco substitute therein. The individual perforations are shown as materials. For example. pulled grains such as entarged in Figures I and 2. pulled miles. rye. barley, and the like. also can be Typically. the tobacco rod has a length which employed as filler materials. Often. certain amounts ranges from about 50 mm to allout 85 mm, and a of Burley or Maryland tobaccos. or [he so called .:.ircurnforence of about *16'mm to . about 28'mm. 20 rare or specialty tobaccos can be employed as 'lie tonacco rods and the resulting cigarettes can blend components also. The tobacco materials can Uo maitufacturod in any kncwn configuration using be employed in a processed form (eq as volume known cigarette making techniques and equipment. exoancled fluo-curod tobacco filler) For e-xarnpla. Typically. the filler element has a length which the tobacco material can be volume expanded us- ranges from about 20 mm to about 35 mm and a 25 ing the techniques described in U S. Patent No. circumference of about 16 mm to about 28 mm. 3.524.451 to Fredrickson or in U.S. Patent No. The filter material can be any suitable material 4.531,529 to White at aL It desired the preferred such as cellulose acetate. polypropylene. tobacco flue-cured tot)acco material -an be blended with material. or the like. The plug wrap typically is a processed tobacco stems. eConstituted tobacco conventional paper plug wrap. and can be either air 30 materials (eg., preferably those reconstituted to- permeable or essentially air impermeable. How- bacco materials made principally from llue-cured ever, it desired. a nonwrapped cellulose acetate tobacco and/or Oriental tobaccos). or tobacco sub- filler element can be employed. The various filter stilute materials. If desired. !he preferred tobacco elements suitable for use in this invention can be materials can be blended with varying amounts of manufactured using known cigarette filter making 35 carbonized andfor pyrolyzed materials. techniques and equipment. The smokable materials generally are em- Filter elements preferably provide minimal ployed in the form of cut filler as is common in mainstream smoke removal efficiencies while main- conventional cigarette manu!acture. For example. taining the desirable draw characteristics of the the smokable filler material can be employed in the cigarette. Such minimal smoke removal efficiencies .00 form of shreds or strands cut into widths ranging are provided by the so-called 'low efficiency' [it- from about 1,25 inch to about 1.60 inch. preferably tars. Low efficiency filters have a minimal ability to from about 1/30 inch to about IM0 inch. Generally. remove mainstream smoke particulates. Generally. such pieces have lengths which range form about low efficiency filters provide about 40 weight per- 0.25 inch to about 3 inches. cent mainstream smoke particulate removal effi- .85 The filler material most desirably is composed ciency or less. The low efficiency filter is desirably of more than about 70 weight percent Ilue-curea used herein in order that the relatively low "lar" tobacco material. more preferably more than about yield is obtained primarily as a result of a relatively 75 weight percent flue-cured tobacco material. and high level of filter ventilation or air dilution. Such most preferably more than about 60 weight percent riqarotto configurations provide a means for t-3duc- 50 flue-cured tobacco material. Oftentimes in in- .ng the yields of mainstream gaseous components. stances when the flue-cured tobacco cut tiller is An example of a suitable material for providing a highly.volume expanded. a majority of the volume low -:11iciency filler element is a cellulose acelato of the tiller material within a blend is occupied by low itein having about 8 denier per filament and the volume expanded flue-cured tobacco material about .10.000 lotal denier. 55 (eg more than about 80 percent. and frequently Alternatively. the cigarette can have a mouth- more than 90 percent of the volume of the filler is ps- ep ~#Itnppeo with mrians for providing air dilu- occupied by the flue-cured tobacco matenal). I@-ts- I-) tho mainstream aerosol. the mouthpiece can An example of a preferred tiller material in- C) 4 pli Rini, C)1% .;=,j lk ___ __ 1-.0 II.L. BATCo document for Legal Services : Health Canada 18 October 1999 0 290 9 11 a 1::110es Jtjovz to 1,~ al)Uul 2 .1) ;;ercalit CY jistance is nctatcj cy !ac;ois suct, as 1)tw-nial 1013aCCO material ar-c IrOM 30011 8U to ng onstramps as~cctaiec ,tn -,he type .:,i ODoing JU-i t 90 percent I)y Nolignt -I flue-Culed -OCaCCO ~7010y,-d a00 the manufacturing 3opa,a- material. tus and pirocess For exampie. ior a filler ?iernent Preferred (titer materials include a relatively 5 having a 27 rnm :ength the maximurn 3istance large proportion of volume expanded flue-cured may range from aCour 23 mm to about 26 inim lo0acco material. Such volume expanded lonacco Irolin the axireme rrictZhena of zhe [titer .3lement. materials aid in provtdino a tobacco rod having a The positioning -~f Me air jilulion vents a maximum low packing density. An example of a Suitable disiance from, the axtreme mcutmend of it--e article blonci, is a blend of about 17 Neighi oercent Orien- to allows for providing a MaA1MUrn ienrilalion oval tot tal tobaccos and about 83 weight percent volurne a given ~tar- yield anC maximum Cigarette ores- expancea Ilue-Cured tobacco. sure drop for a given filter alemom ana tobacco faci As used herein. 'packing density' means the combination. weight of the tiller material which occupies a unit As used herein. the term "air dilution~ is the volume within trie smokable rod. For articles of this ts ratio (generally expressed as a percentage) of ine invention. the packing density generally ranges volume of atr drawn through the air dilution means from about 100 mg,cm-' to about 250 rngcm-. to the total volume of air and aerosol -irawn more typically from about 100 MgCM3 to about through the smoking article and exiting the extreme 200 mg-cm3. and in certain instances from about mouthend portion of the smoking article. For air 130 mg-cm-, to about 180 mg CmJ. 20 diluted or ventilated smoking articles of this inven- Flavorants can be incorporated tillo the Ciga- lion. the amount of air dilution can vary. Generally. irettes. For example. the tiller materials can be the amount of air dilution for a cigarette is greater employed with or without casing or top dressing than about 30 percent, preferably greater than addilwes. See. for example. Leffingwoll at al. To- about 40 percent. more preferably greater than bacco Flavorinq Lor Smokino Products (1972). 25 about 50 percent. Typically. for Cigarettes of rela- Flavorants such as menthol can be incorporated tively small Circumference Ji.e about 21 mm or into the cigarette using fechnioueS familiar to the less) the air dilution can be somewhat less than skilled artisan. It desired. flavor additives such as that of cigarettes of larger Circumference. The up- organic acids can be incorporated into the cigarette per limit of air dilution for a cigarette typically is as additives to the cut filler. In particular. levulinic 30 less than about 85 percent. more frequently less acid. nicotine tovulinate, or a mixture of levulinic than about 75 percent. acid and nicotine can be incorporated into the As used horoir. the term 'pressure drop" in cigarette. For example. the levulinic acid, nicotine referring to the smoking article is meant that dif- iavulinaio or levuisnic acicVnico(ine mixture can be leforicla bDiwoon atmospheric pressure al the ax- added to itio cut filler in amounts which typically 35 treme mouthend point of the smoking article. as range from about I to about 10 percent. based on measured at a given flow rate through the smoking the weight of the cut filler. article. Typical pressure drop values for cigarettes Typically. the tipping material circumscribes of INS invention are greater that about 40 mm. the [titer elemont and an adjacent region of the more frequently greater than about 50 mrn of -evater tobacco rod such that the tipping mainrial extends 40 pressure drop at 17 5 ml.-slac of air flow rate. about 3 mm to about 6 mm along the length of the Most desirable wrapping materials for [he to- tobacco rod. Typically, the lipping material is a bacco rod have relatively *low inherent permoaciiiii- conventional paper tipping material. The tipping ies and relatively high net permeabilities. By the material can have a porosity which Can vary. For term "inherent permeability' is meant the air flow example. the tipping material can be essentially air .45 porosity of the wrapping material itself. Typically. impermeable, air permeable, or be treated leg., by wrapping materials having low inherent permeabilit- mechanical or laser perforation techniques) so as lies have porosities which are less than about 45 to have a region of perforations. openings or vents CORESTA units. preferably less than about 30 thereby providing a means to( providing air dilution CORESTA - units , and more prelerably iboul 15 to the cigarette. The total surface area of the per- 50 IICORESTA~unitS or less.'By the form 'not per- forations and the positioning of [tie perforations meabili(y" is meant the air flow porosity of the along the periphery of the Smoking article can be wrapping material as used in manufacturing the varied in order to conifol the performance char- tobacco rod, Typically. the air permeability is pro- acteristics olltho smoking article. vidod to the wrapping material using rnicror laser, Pielerably. the air Jilution means is positioned 55 mechanical or electrostatic perforation lechnirliti"S. alo,jig the length of the cigarette al a point along During micro laser and electrostatic perforation op- Ili-) filler which is al a maximum clislanco from the orations. it is most desirable that care be laktin to extrome rnoulliond of tho article. The maximum maintain the desired color and opacity of 11,F) Ila- Xlt. 5 C) CD BATCo document for Legal Services: Health Canada 18 October 1999 q 0 290 911 141 0- F- it -s ,losiranle to minimize to th-3 :s:at .,)' we :qarelle befG(e -1 av-1i,1 3r, urlsigntly *-,)iowt1in-," or singeing of the ;,7-.~- ng. T,.:ai ~eigh( loss -)t a >jaretto .1unrig srrr.ing is ;ne,::1y related 10 tho- total smoke emit- Pr,?Iilrte;j vrapoing inalerialS are paper wrap. le,1 :q inei cigarette. Cigirettes ;I this mvi-iniion piliq materials Nhsch --owain from about 10 to 5 a weigni loss Nhich is typiCally about 15 about -35 ciorcent by welqht of magnesium 0,,4de percent less, and Occasionally as much as about and*or magnesium hydroxide. as well as flax, cel- 25 zercent Jess than Conventional tgarelles cf lulose pulp. urn,a4difives i *such as potassium ci-O Cor-.-,zirable PTC "tar' deliver i and configuration, trale' or potassium carbonate." arid other matenal.,' _,;garettes ot this inverilsoll rioluco less visibie such as filters. Often. -jostraole paper wrapping ro siclesirearn Smoke than ..oiworiorival cigarettes of materials contain more than about 15 percent by cor-,:;arable configuration when evaluated using the weight ol magnesium oode and.or magnesium hy- rnev,.od described by Baker at .-ot. 3. lines 38-49 ,~f r1ioxide. Examples of suilaole materials are de- U.S Patent No. 4.624.268. The reduction in visible scribed in U.S. Patent Nos. 4.231.377 to Cline et at: sicesream smoke ol cigarettes of this invention is 4.420.002 to Cline and 4.450.847 to Owens. is suc,-. that sioestream Smoke emitted by cigarettes The wrapping mateiials are processed in order of this invention frenuently can be as much as 50 to have a relatively high net permeabilities. For percent of that of Conventional cigarettes of com- example. wrapping material having low inherent parazle FTC 'tar" delivery and configuration. By permeabilities can be porforated using conventional the zerm 'configuration* in referring to a cigarette electrostatic perforating techniques (eg to praiide 20 is meant the circumference. tobacco rod length and individuai perforations comparable in size to con- filter element length. In addition. in terms of San- Yonlional oJechostatically provided porforalions~ to scry perception. the sidestrearn smoke of ciga- obtain a w(appin.9 mal.artal having a porosity of fet(OS Of [his invention can be characterized as Jess from about ~'O to about 250 CORESTA, units. pref- irritating than that of conventional cigareties of eiabty from about 80 to about 140 CORESTA units, 25 comcarable FT C,,"tat" delivery and configuration more preferably from about 90 to about 120 COR- when evaluated using the test methodology Cle- ESTA units. Scribed by G. A. Ryan, 40th Tobacco Chemists' The sizes of the individual perforations which Research Conference (October. 1986). provide for the high not permeabilities to the ciga- T he following examples are provided in order inito paper wrap generally are such that the per- 10 to further illustrate the invention but should not be lorations ate larger than the pores which are consiruea as limiting the scope thereof. Unless present in the naturally occurring paper wrap (i.e otherwise noted. all parts and percentages are by which provide the inherent permeability to the pa- weight. per). For aesthetics purposes. the individual per- forations preferably are small enough to not be '75 unsightly. For example. the perforations are not EXAMPLE I particularly noticeable. and in most instances are barely visible to the naked eye. Cigarettes of this invention generally deliver Cigarettes having lengths of about 99 mm and FTC 'tar" in the range from about 2 to about 10 jo circurnferences of about 24.85 mm havo tobacco mg,crgaratte~ and Carbon monoxide in the range rod lengths of 68 mm and filter element lengths of lower than that of a cigarette of a comparable "tar' 31 mm. The tobacco rod includes a charge of level. The cigarettes yield relatively low levels of tobacco cut filler contained in a circumscribing mainstream gaseous components Fuch as carbon cigarette paper wrap. The filler material employed inonoxide and nitrogen oxedus. For example. typi. 's in providing the tobacco rod is in the form of cat FTC *far- to FTC carbon monoxide ratios are strands cut at about 32 cuts per inch. The initial less than abotit 1. frequently less than about 0.8. in filler material includes a blend of about 83 percent certain instances less than about 0.6. flue-cured tobacco which has been volume ex- Cigarettes of this invention generally deliver panded to about twice its original volume. and 1-ns smoke due to the relatively low total connum- 50 about 17 percent Oriental tobacco. The blend has a able tobacco weight provided by the expanded water and glycerine casing applied thereto. _ - tobaccos. grains andfor Casbonized materials. By The paper wrap is sold commercially as tcusla. Ilia term "less smoke' in referring to a cigarette of .'Experimental No. TOD 03363 by Ecusta Corp.' The INS; invention is the weight loss cluting FTC sinok- paper wrap is a heavy weight sheet. low visible inrl Conditions is lower than conventional cigarettes 55 sidestrearn, paper, and contains about 40 percent of sirridar -tar* delivery arwl configuration. Weight magnesium oxide. The paper has an inherent per- loss is measutod by collecting Ilia ash and butt of moabdity of 15 CORESTA units and a basis weight of 45 g.m:. The paper is electrostatically perforated Iloi cigarelle after smoking. and comparing that 6 "'V ~. - 1 -4. M" __j C:) BATCo document for Legal Services : Health Canada 18 October 1999 0 290 9t -,,f~ef :V pel.) a let The _i,3are;t0 .- SITICKe(l Jn(] Jew'O's ." :!I '(..1meab,llt,/ f Ito CC I- ESTA unifs. Tilt? -pincral perti.)ialron Pattern is :,)I;acco tlavor as well as an acceozable -31a(t -es,s- vio~n in Figure 2 The wo-iouat perforations eacri ;ance. The inatiriStroam aerosol S not harsh ana me have a SiZe Corriciaiable 10 conventional eteciro- 'irarette yields cesifacile Smoking satiSfaCtion slatic PerfoialtonS in Cotwenfional cigarette wrao. i Also. the cigarette -pelas ;cw amounts )f vsioie and are positioned with about I to about 10 sidestream smoke. perlorations.ri)m essentially linearly in the tongitum- nat direction such that ine lines of perforations are posslionea about I mrn to about 3 mm apart. E: