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U'iii'ted States Patent (uqJ lihle CICriARI•CiTF: Invcntar: Rnbcrt W. lilrlc, IMn Aic, Va. Assignee: Phi(ip Murris, lncorporatud, Nerv' York', N.Y. P '' A'PDI. No.: 146,534: Filed: M.r, 2, 1980 " ~ -, I,,v Iint. Q.) ............................................... A241) 3/114US. CL .................................... 131/331; 131/338; 1311i/339; 1311/344; 13'Jr'_i4); 111/All; 131/8p; 1311/90; 131/92; 13I1/362;' 1'31/363; 4AB/42; 493/43; 493/:f7; 493/49 (581 Field of Scarch ................... 1311/q:,110; 10 3. 10 5. 131/90.~7; 10'9, 261 R. 261111;,274.,331. 3R8. 339. 340. 341', 34 1 Ju: 347:, 361, 362, 363 Rcfercnees Cited U.S. PATENT DOCUMENTS 2.319.312 Z 5/19t3' Cuam Jr . ....... ................. 1.1/'I0.3 2,949.1116 !i/1o60'' 8alkmd ............................. UW'10:3' ],010.7'32 6/1962 Gant ......... .. ..................... 131J10:5 , 3:0bb,E7312/1962 Allman. Jr ....................... 1311i/I0:3 3.167.076 1/1965 Mare .............................. _., 1311Y103 3,29,21635 12/1966 Koltxlny ........................... 1711/10.'S 3.31t4:861 6/ 1%'7 Gaimman ............................. 1'3J Y10.'S 3.373:730 3/196! Beam ............................._.. 1']Il/10:3 3;161,d80 E/19b9 Stubblefield .................... 131/261 8 A? Z (illnl~ 4,331,166 (+KI May 25, 1'9R2 3.4A9:4s2 3/1970 I:aIlLarw+. ......... ... ........... 131/17 R 3.61l:712 1/1q7p' Ii . ... ...... ............ 131J'10.3 3:ue.79'S ></IA74 s6umalrr cl al . .............. 13u/17'It' 3.e!W:244 II/Jq74 I ukc .. .......................... 1)1,/261 11 3.141.339 10/'19" M 11Aor.cw•cll e( al . ............. 1')1d261 I! 3.r34 Ja4 12/a9:4' Ma)l.K ...... .......... ........... 131/261 0 ).133.032 12/'197r I.uke .............................. ... 131/I0.3 1 3:f60.011 1/1975 Pkwatan ................... _........ IDIt10,3 ~ 3:994.306 1//19.6 Ikrpcn ............... . .. ........... 1)1/103 4.022.271 3/1977 111 .............. _......... ...... 131/103 4:026.)00 S/1977 1krW ............ .................. 131/10.3 FOREIGN PATENT ©OCC'MENTS30lSi 1i/196s swli ..._ .................. U1/11Ds 177I794 10/1974 Umlc+dKmgtkom ............ U1/Jp S Pnmarr lrromincv-t`: N(illin . atrorn.7:~arenr. or Firm-Arthur 1. Paltncr. Jr4: Nelson A. 81ish (57J', ABSTRsACT The sensorn' effect of ctgarette sm.nk'e is impro.•ed by using a disc 12it1 lo share the (lhw of smoke (32) ka.ang smoking article (II0) into a dt.ergrntpawarnt thus in- creasing the ln+rceived (la.•or of the'cip.reuc:,Thc ef- fect is most usefuliwtth ct_¢arettes having relatively lo?a delivery of particulate matter., ! Clai'rns, 3 Drawing FiQurts 41 Cw A

U.S. Patient May 25, 1982 Fig. 2 Fig.3 ,25 4',33 19 166 f- __ 30

4.331,166 1' 22 CIGAREiTE description when cc*nsiderc+d in connection Mith the accompanyinK drawrnR% w-hcrctni BACKGROUND OFT11E INVENTION FIG. I is a prcak-tivc vrew of a smoking artick according tu thc prcwcnt rnventwn; This invention rclates to smuking articles in gcncral; s' FIG. 2 i.s a partral l.nngrtudtnal cross section of the and more particularly to a cigarette adapterd to give rnvenlton shown in FIG. 1; and improved sensory cfftct. FIG. 3 is a partial longitudinal cross section of an DESCRII'TION OF THE PRIOR A RT +Itcnnate embcxlimcnl'of the invcnttun. The eurrcnt trend in cigarette manufacturing, has 10 been to reduce thc concentration ofecrtaincomponents DESCRIPTION OF TiIE PREFERRED EMBODIMENT of cigarctte smoke. Foreaamnle, filters madc of fibrous • Referring now more particularly to the dfawings and materials such as cellulose acetate are used lto lower the speciftcally to FIK',r'. 1, there is illustrated a preferred concentration of particulate mattcr in ~the smoke goner- embodiment of the invention as it would be used in a ated during,smoking: Venulationtntothe,filterhas bcern ls smoking artick„in this case a cigarctte. designated gen- used to further reduce the concentration of particulate erally by the numeral 10: Cigarette 10 has two major matterand also to lower the conccntration of gas phase parts, smoking cylinder 12 and filtar element 14! eomponrnts: Dhthimcthodt. howcver, tend to dilute the Filter element 14 consists of' filter medium 18„ plugg smoke to such an extencthat the flavor of the eigarcttc ~ wrapper 20, and ttpping paper 22. Filter medium 18 is is often adverselly affected. cylindrical in shape and substantially conforms to the Prior art methods of compensating for a deficiency in cross sectional sise and shape of, smoking cylinder 12. flavor of cigarettr smoke, w•hethendue to cigarette filter The filter medium 18 may be composed of any known or other factors, have met with varying degrees of'suc- filtering medium or combination thereof, but in thee cess. One method of enhansing the flavor of the eiga- referredlembodimeni„the filtermodium 18 iscetlulose rette has been to add flavor material to the tobacco. ~s Examples of this type solunon are disclosed by Schu acetate: Filter medium 18 is covered with plug wrapper - macher etial, U.S: Pat. Noi 3,8.8;79'S, and Kallianos ct 20' aL U.S. Pat. No. 3,f99,452: A drawback associated with . The filter medium 18 abuts smoking eylinder12 and this method is that the filter will often reduce or dilute is attached I to smokinq cydinder, 12 in i a conventional the taste of the Oas•or additive in the same manner that 3C manner. In the prcftrrcd'embodiment; filter medium 18 the cigarette smoke is diluted. A further disadvantage is is attached l to smoking cylinder 12 by use of tipping that the Oavorants arc often expensive and appreciably paper 22. increase the manufacturing cost. Disc 24' is an area on the smoke exit surface of filter Another method of enhancing the perceived Qavor or medium 18 that has been heat fused. The heat fused . filtereA; ventilated cigarettes is to concentrate the 35 area, disc 24, is created by pressing a rod of'hot metal, smoke lea.•ing,the'cigarette mouthpiece into a narrow, not shown, or other similar object against the smoke centralized stream. Examples of this arrshown by Mor- exit face of filter medium 18. This method' of forming, man, U.S. Pat: No: 3,g60J0111 and by Dwyerei al. U.S. disc 24 creates a small indented area: shown inFIG. 2. Ser: No. 073,394, filedl Sepu 7. 1979. These methods, which does not dctract from~the overall appearance of however„dinect'thrsmoke stream~against a small area 40 cigarette 10 the thickness of theheat fused disc formed of the smokers mouth or tongue;,and consequently may by this method is approximately, 0i05' (mm) thick: cause a burning,sensation. Another disadvantage is that Because of the temperature of'the metal rod used to this type of filter with a centralized passage or duct, is form disc 24, and the pressure with which it is applied to more expensive to mass produce than conventional the smoke exit surface of filter medium 18, it is not filters. 4s necessary to maintain the metal rod in contact with the It' is, thercGore, in object of the present invcntion to filter medium for any length of time. Thus. this methodd provide a cigarette that gives increased flavor, to the of creating disc 24 is compatible with high speed ciga- smoker and can be macs produced without major in- rette manufacturing machines. In the preferred embodi- creases in manufacturing costs. ment the metalirodl tempcrature is 36Q' centigrade (C), It is also an objcct1of the,present invcntion to provide 50 and it is applied to filter medium 18 fiora period of aboutl a cigarette with improved'flavorthal may be produced with only minor changes in cigarette manufacturing onrtenth,second wit~hisufficient force to heal',fuse thee mcthods: ccllulosc acctatc into an air impervious disc. SUMMARY OF THE'INVENTIPJ'N' It has bc7cn found that di~sc,24 functions brst w•hen, it, 53 tsnearthccen(crofthesmokeexut,f:iccoffiltcrmcdium~ ' 8 andiabout thrce to fuur mt111meters (mm) in diameter. According in the present inventibn, the foregoing 1 anr7'othcr ohjccts arc attained by, provrding,a amrrkrng, Larger diamctcr dtscs tend In increase rc.ntance tn arucle with an es+.cntiallly, airtmpervtousdrse,at the cxit draw (RTI)) in an un.atufactnry manncn and .maller of thc smoking arttcle This dt.c is locatcd at thc ap- drrmracr dtxs fail ttr achrevc thc dcstrrd effccL In the pruxtmatc ccntcr'.rf tlic eau end of the smokung arttclc 60 prefcrredlcmhexJnncnt„ihecigarrttcdlamctcr7baf+prox- and i6rces tlic smoke entcrung, thc uver's mouth into an capanding paucrin l hc cffect in most uscful wtth ciga• rcttcs hwtng rclrtuvcly 11rw dclrvcry HR'1f:F l)GSCR'II'riO!4 OF TlIIE DRAWINGS A morc crnmplcte apprccranomi rrf the invcmunn and m:rn}f nf Dhc jrtcn,t:rnt -lbjn7aFcs Ihcrouf wall bc.c ri'.ralilry.r(1t+j~rani liy,rcli.ra.n- /., ILo 1,dl-urg rlcl,iGcd =1tely 8 mmi FIG. 2 shows the cfftcl of disc 24 on smoke delivery patterns Sntoke travclmg through smoktng cyltndcr 1'2. conststing of t0tiauc4, nmd 28 and aEerrntc wr6rrfXr 26. 65' passcs into fdtcr clhrncnt 14 Smcrt.c rcachutd tha exit facc of'fihct rncdwm IN cammt pas tltruutih dr.r 24. which is css'CnliJliy air imRrrvarou., and crni*cyurutlll U•j* cs. fillcr rlc.mcnt'li' w iih ei r'.r.ti.,ll vci.~ il~y. --nir.r-

3 4,331,166' 4 nent.,7his effcct is illustrated by exit smoke 32'in FlIO. renRonx ftom ctig.rcttes withr.ul adjuuing, the blend or 2; mal'ing,nwjcrr cliankc% in tiltcr vlructurc: While the exact mechanism is not undcrstond;, it is It will he unJcrwtaKKl tliat tltc fixcgr+rntt.k-scription es, believed the c.panding conc shape of' czit sntoke 32; or' thc pnderrcd i omhixlirrtcnt of the mveutKtn and ik causes particulate mattcr in the smc.ke Io, rmpas t on a 3 thcrcfirrc. ntcncly rcprewml•rtiwc. Obviously there are larger numkur of senxtrsin thc smcnkcrs mouth thanthe m~y'variatarns and nK~rlifrcatr~ms of the lurescnt~invem crnlummaf exit smokc from a cwnventional ciFr tion rnliFht of the abovc tcxhing.s tNat wi11 he readily narrow• apparent to those skillecd in the arn; For c.ampk: thc rette. The largcr, number of scnstuy receptors con- disc trtay, be placed at the end of a smoking artrcJe that tacted;giveincreasedscnsoryresponse;orllavortothe lo does ncst have a filtcr. It is thercfore una7crstood that smoker: within the scope of'thc appcnded'claims the invention The invention is most usebil whcn i used i with low may, be practiced l otherwise than as speicifrcalHy de: delivery, cigarettes. Huwever: stronger eigarettes, scribed. sometimes rcfcrrcJ to as full flavor eigarctacs may pro. I claim: ducr an undcsitable sensation on the tip of the tongue IS' 1. A smoking article the improvement which eom. where thc cigarette smoke is concentrated, due to the pr!sclaidisc approxirnately 3 tu i mm itr diameter at the fact that smoke tends to leave cigarettes in, a rather exit of'said smoking articlc whichiforces smoke 1lavmg, r narrow column. Thus the present invention would be said smoking aotick into a divcrgcnt pattcrn. useful for this type of cigarette also, since it'causes the 2. A smoking article as in claim I wlicroin said disc is 20 located at the exit end of a Glter attached to said smok. smoke to impact a larger area of the mouth. utg,anicle. FlG.3'stiows an alternate embodiment ofithe inven- 3. A smoking artick as in1 claim I'or 2 wherein said tion in which disc 24 is a circular piece of air impervious disc is iocated at the approximate eenter of'the exit end cellulose acetate which has been glued to the exit face of said smoking article or said filter. of filter medium l81 The disc 24 may also be formed by 25 4. A smoking article as in iclaim l l or 2 wherein said placing a drop of triacetine or acetone on the exit face of dise is essentially air impervious: filter medium 18'or. may be formed by tuing,any of the S. A method of making a smoking article the im+ above in combination. The disc formed'by this method provement which comprises forming a disc having a is approximately 0.05 mm thiickL diameter of 3 to:4 mm at the exit end of a f Iter, attached Low delivery cigarettes, modified according to the 30 to said stnoking,artick. present invention, were subjecti vely compared with 6. A smoking article as in claim 2 wherein said disc is unmodired cigarettes of the same brand by a smoker's a heat fused area at the exit end of said' filter4 panel, andiKere found to have increase sensory effects. ~° A smoking articlras in claim 2'whercin said disc is formed by placing a drop of trnacetin at the exit end of Analytical tests of the modifedland'eontrollcigarettes ]S said filter_ showed no significant change in bLTD; total particulate g. A,smoking articlr,as in claim 2'wherein said disc is matter (rPM), nicotine and dilution. formed by placing a drop of acetone at the exit end of It is thus seen that this simple,and inexpensive modifi- said fUter_ cation to cigarettes may be used to increase the sensory 40 30' 55 60