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the rclation between Ihe size of thc spots and the spac- " i:ng of the spots be snch that the esi,;lencc of the trcatcd VM `- :ereas will not scr.e to extinFuish tht ci;arctte such as :uou1J occur if thc entire surfacc of the eiparctte were G` trc:rtcd w•hile, at thc same time, the spots musf be of sullicicnl size and proximity to providc a suitablc barritr °~- :bctwccn thc burnin, - portion of the ci:atcttc anJ a surface ~' in cnntact thcret.•ith to cfTcctit~cly protcct the surface from lhc burninc portion of tltc cicarctlc : 1-.;, i;tvcntion relates to an improvcd cigarette con- 10's` IC will bc.cvidcnt that the trcatntent rs not lunitcd ee:ion and, morc particrdarls•, to a cigarclic tsrappcr to a patlcrn of spnls•such as lhc spots 14 shutvrt in' ;,n•uuttirm providing a scrb.tuntial Jc,.--rcc of firc pro-,S~FIGUIil_• 1. In FIGURE 2 there is indicated gcncrally in and protiJine a partial rctcntiun uf the eigarcttc 3 ,;:i.~'at 1G a eirarcttc Is:rvins a nrapper 13 and s„tippcd end in FIGU1th 2 the ttrappcr Ifiis trc:rtcJ along bariJs ~u.uetous sir,Scstions hat•c hcrctufcrc becn maJc for ly "forrninl. hclical eonvolutions 20 cxtenclin, ai+nnd thc the frre h•rz:rrd involved in conncctiun t.itlt ci.larctte in spaced relation. 7•he widths of the hands and for rctarnin_ the aehes furmcd by a burning :'30 and the sp:teincs 21 hcttcccn the bands arc'scJceted-'=", ,Li.tret,c. I llc5e SU-t:; eslIJ115. all involVC lhe use of clabo- SYaoprovidc,r upnn burning of the ei_arcttc,'su(1'icientlv~ ::c apparatns providing a ci;:rrcttc structurc which will lrr_r.c barrier arcas to -pruvida thc dcaircd res:ilt and a ci,,xrcttc to ccase burning t.hcn jnt rest upon a ~,rfa;c, such :rs. for esanrpic, a hnldcr or an a.h tray, nr:,ny of which will caume a eigarcltc to eeOsc hurn- a; ctcn'iehcn held away front any cuntacttng-sutface if y :r: ri;:ucttc is not pu(1cJ frcqltcntly. ' b 1 J such ' e cmp nye as blocks, 1: ic the primary uhjc: t of this in.cntion to pro:-idc a ..=~:cttc hacing a t.rarpcr which tt~ill provitlc• during :rr.ing of thc cioarcac, barrier arcas for spacin, thc '.orn:n, pwtion of thc ci_arcttc from a surficc in cn- :r;cmcnt with thc ci:•arcttc inJ; at the same tinic, pro- a a cigarctt: which tvill, continue burning even ~t•hcn :.r i•:in~ puticJ. 1: i: a further object of the int•cntion to providc a tshich, ~.+hcn burncJ, .:ill serve to retain the :•lar,tte ash until titc ash is brol:cn a.+•ay by the ap- uf extcrnal force such as the prc%sin, of the -~ ~cainst an ash tray by a p.rson holQia_ lhe ci~:,rcttc. Tk.,se and other objects of titc iu.'cntion. relating par- -: .~:ly to the construction tttcrcof• ~t•ill b:cumc c.•id.nt f'cT the following dcscrip :ion when read in conjunction '~~ the accompanging drawing, in which: ' FIGUl' tl3 1 is a shut~~ino of a ci_arettc havinospaccd thcrcof prosiclinl: barricr arcas;, . rl(.t/tE 2 is a sho+~•in^ uf a cicarottc having c1ong:rtcJ -?:as thercof in the formcof helical banJs providing bar- '~ :ucas; s1tuUZE 3 is a showing of a burning cirarcuc lrcatcJ 3-~:urdancc with one embodiment of the invention and 'nk upon a su`portin~ surface. •t I IC;UItI_' I th:rc is indicntc+f ccncrallv/ at 10 a ::=ct1c having the cont•cntiunal t~ihncco fillcr ..r::prcd . •.: _^ a P:lpcr or similar combustihlt: .vrap p_r 12 and ' x=r~-1 With a tipped end 11. The structure thus far '' •','':J is the commonly cnipln~•eJ cigarette str ucrur. 1i 'hc clc;trcttc of my in.cntiun shown in FIGURE 1. ,-•Ti•r is trcalcJ in arc:ot fnnuitt_ .paceJ srots to J- h:,rricr areas which ttiill hc sui'tahlc for spacin, •' ~°r^ifhif in n^ portion o te c6;ueUc from a sutace t~~s;rrnt•nt .tith the ci'oarcttc. 'rhus, it thc ciynrcac is •'~e~ or falls upon a Wond• fabric, p;tpcr or similar ;•'••`uttit•Ic surface, the surfacr u•ill not be nr:itcriallv ..- hL ho:,t from tlte cigarette and the tLingrr of _ e rrsulling from contaciof a burningcigarettc lhrre- ' ~ is Substantially climinaied• JTMe sl'ot3 shox•n in FIGURE I may hc of various sizcs, ~ tand •l*acings. I~ur cxarnplc. thc spots ntay he i ~: utimatcly ?j~" diameter spaeed on approtiintatcly ' ecr.ICrs, hov~ever, lhe shot dinntelers may ran^e from 1':"otim;,tcl.• 1t:r1f to aprro.iirrntcl~• ttcitc lhis sizc with 4::rI•ximatclp proportionally ~pac.cJ ecnters. 11l il, thc iurcrnin~ .rl•pro~irnatr riinm:.r.ciuns have been t~~n J ,::. t-- i:,+cnti.*n ic not l~rni::.! t! : rclr:. l h: " - g,010.9Gt , CIC.~ltl.t'1 F. Cl)~51 RUCI'1(1\ C}~sr1c< C. Cfrhn, Atiantir t'ity, 1.J., a.•ic,rur lo Sanrrrcl I• (-ohn and Charles C. C4~:an, cuparlltcrs, Ir:rdirr_ and Gu%iucss as Culuuial Allu)s Courparry, l'biia- . ,... ;,: 6ctpbir, I', Filed ~:u.. 18, 19(~!1, Str. No. 71,368 ;= 6 Claiuts. ,(CI•'J31-i) `Q 'suflicicntly wide combustible areas so as not to ~riest ', eon~busriirn of thc eit:;uctte v:hen it is no[ Geinc puffcd. illilc inddii It 1• be cvcrtt that aton to thc patterns shosvrt ` in FIGURES 1 and 2,- that various other patterns mb slraiahi Iinez, cte. ~ ch= The barrier arc~s arc furnrcd by dry Jcposits of alkali' h 24 silic:dc on the ci_arctte wrapper. The quantity of eom- y~ rosition u•atcr anJ thc qrtality of silica in Ihc-dry silicate _,' ; deposit arc of primc importrtn_c. Silica must be prescnt in an amount corresponding to at least 0.013 gr:ant p=r 30 sqtrarc centimeter of the area eoccrcd by the depasit, and the water of composition must account for at least 15 p<rccnt of the u•ci,-ht of lhc dry silicatc crcrosit. ."Thcrc arc no upper liroits for thc K•ater of composition ~T -~*-: and silica pr<<ent_ in the dry silicate deposit. If either ~~ thc water or silica contenl of the dry silicate dep osit fall N~_: bclow the lower limits set forth ::hovc, the a['plicant's ~~ end purtwc•_ is ;1_f:aled. 1'refcrahly, titc silicate dcposit is from evaporation of an aqucous sultation of a water- b~ sohtblc silicate in t.hich the silica radical (SiOs) ac- 4U counts for.at least approximatcly 14.5 parcanl of thc total JJ OU Go 70 weight of the solution. Such a solution, tehcn rlaecd a= upon a cigarette wrapgcr, does not run or sprcaJ frecly, ' but instcad has a tcndcncy to forni a rcl~tivcly thick laycr covcrin, a restrictcd arca in cunscqucncc u( Khich ~° , it facilitatcs-trcatrncut of the ci_arcttc .%raprcr. The aqueous solutinn of a satcr-solublc silicate may `be applied to a lar_ e sheet of cicarette p:lper by any •cuit- ahlc ntcans. Prcfcrably, it ic printed on, in thc dcsircd pattern of barrier arcas. Thcn the u•ct rapcr anJ the ~~ Gu solution printcd thcrcon arc dricd, prcferably by the ap- ptication of heut. Even in its dry a:ite, the b:trricr furnr .ing material retains some water in its coatposition. The Icmpcr, turc ntust not be hi:h enough to drive utT' th: - yvatcr of comnocition. If JcsircJ, the banicr (ornti•tg sull:tinn ntat• l•c Jr.icJ tu ithntu al+pivinm, hcat• hrq if 11::rt is applied, tlt,: tcnrpcranuc prcf.r.rhl}• is snG>tanli.tlh l:v< th:rn 212' F., otherwise the •cattr of compo-.itiou nt.t)• b: t•:Ipuriicd: and thc ztc:1nr cau.cs ,l+c %ilicatr to foam trp. par:r \t'lun tltc sulutiurr dtics. it Ic:rt•.s e+tl the cic:rrctto a rntlt_n cca.y dtt+;r%it tthi:lt lrrrnts the b:rrricr :rre:t of tlte in+cntin+t. 7hc ci°sucll2 pap,; is then cut tip into individhual cic~:rrette e:rarpvrs. . • in f~1GUlLl: 3 lh.•rc ia shou•n c:ncrally at 10 a cie:rrclte spottcsT.+•itlt barrirr :v.1s, as cliutcn in FIGUR1:.1: As one cxumhlr. thc•c harricr :rrcac t.ctc furmcd by dry dc- pusits frn,n Jrups of a sotliunt silicate solution :4hplicJ in 1lte ci_;rrctle tt•r:rppCr• •lltc cilic:r r:rdical (Sill.) ae- eo:rntcd fur at Icact 1-t.S percent of the tot:rl wciFhl of Ihc• Irtatrner.1 culietiun. As anothor es:unplc. Ihc suJiunt silicate suliltian It:rJ a vi.rm.ity o( 1700 ccntir,+icca :rl (IS• F.. a trrlitnrt tu cJic•t nt-A.cular ratitt n( 1:= J. and T ~.. >~~

5 . kV~ t K , ., . . i . .• • 3,030,003 1 a tltc sodium s+hcatc solntion had a htFh viscmdy• a sodium ind sraccd dry, watcr-cnntatning cpots of a aatu cn1u11; _, .4 o ~iliea mOlccUlar ratio of 1:2 and a fiatrmc rc:cclino of silicatc on said tvrarper cficcti>cly providing ao a1i nat; 39 at 20 C:. In eaeh easc, aahcn the hca[ of Ihc burn- pattcrn of non•cortrhttstih.c t.rapncr arcas, ea:h of s:iJ ~ ~;ng eisarct!c reached a barricr arca, the dry sodium sili- -: ; spotc containing at lcact 0.013 Fr:1m of silica per sq-js;e s catc forming thc harricr foantcd up and sat-cllcd to form t; centimeter of wrapper arca covcrcd by said srol, ,~` an outwardly rrojeeling.protttl-cr.tntc •tntc• is indicated at 32• thereby adartcd for foaminr up uridcr the hcat of !t' ~ ~,that xas cnol to thc Inuch: 77tc rrotuhcr:tnccx rcmaincd burning cif;arqttc to providc a protu.•crancc fnr !~.-' on the extcrnal surfacc of th; ash as indicatcd at 34. ~; interposed bcti+•ccn thc burning portion of t;tc c,~,r ' Tho cigarctte is shntivn restinS upon a surfacc 36 and, as „!_,and a snrrorting surfacc undcrt~•inc thc ciearcttc, wi11 bc ca'idcnt from lhc drata•in;• the protuhcrancea 32 10 for hnldinr thc htrrninc portion of thc ctgart[c c'c ,r..'40 snrfacc ;~ th orlin o sn ci lt th i Ih h d Ih « f i f f ' ; rt! c~a rnm r c c nrn n; cn c c c t sc o m c to ra ser. sttpporlinc surface 36. Thc prntu:,cranccs rcnt:,in+n: jn ~r~r.,4., A erFarctic cnnctntction com~ri~inc a cem .u i j+osition on thc cigarctlc a~h, as in ficatcd at 3a• f;rrthcr;wrappcr, a ho.Ty of tobacco cantaincd hv s:tiJ atr r';~' ~,;~•insurc protection of a supror+tnS surf-tcc front thc hcat i'and spaced dry; watcr-containin,r, stripcs of a ~+ of the burning ciyarcttc. silicate on said acra{+1•cr crcctivcly providiiE an ail n, F~.. .Dy way of sumntary, a dry, aaatcr-containing dcpocit p,;paticrn of non•conthnstiblc wrapper arca•, caolr tf ,, : of a tvatcr-solublc silicatc, which deposit forms a hairier stripes containing at leaat 0.013 Frant of tilica rer •a area of Ihe ina•cnlion. must contain it least 0.00 pram F„ccntrmeler of acrap0:r arci coa•ctcd hl• s:t:d strip Le-, ~ of silica per squarc ecntiaictcr of the area covered by `i lhcrchy ad.Vtcd for fa:rrnins up under tli: heat o( +. ` the dcposiC. •17torc is no urt+cr limit for the silica rres- 20 burning ci;:arettc to prc+a•idc a Prrtuhcr:rrcc fc L`-. ' ent in the dry siticate dcro.it. %Vatcr of cornposilion ;interposed hetaa•een the burning rortion of tti: c: should ac_count' for at least IS percent of the ucicltt ot ;. and•:i cupportin: surface und=rl+•in_ the ri;:vclte, ic• application of dr}•in_rg hcat, hut it such hcat is a, plicd, ,O.rappcr. a GeJy of tnhaceo contained by cnid ihc tcmpcr•durc prcfcrahly is lower than 212' T. . ~n;"and deposits on saul wrapper of soltrtc frnm This arl+lic:dion is a cnniinnation-in•part of my coPcnd- ~• sodium silicatc solution having a coJ ium 1o si!i;a ing arplicatinn Serial No. 651,637, filed April 9, 1957,-• ...of 1:2 and a 13:runtc of 39' at 20' C., said denuaaacff::-"' ; ,thc dry siticatc dc,•+osit. There is no tipper limit for thc for holding thc hurnrnc rnr.+on of thc cig:ucttc c't: y p n from thc surpnrtino surfacc y.4; c a•atcr contcnt' of the dr • silicate cic oat. "ihe so:'at:•~ r y ~e applied to the eicarctte r:+pcr may hc dried K•ithout thc ::j - 5- A eigarcttc conslruclion comp:i-tinc a cnrnh~-a; }*, nou• abandoned. ' What is ctnimcd is: . ~.,.... 1V. iE . ~^t S .. .t. ~ .~ ~ . . s .y r. . 1. A cigarette construction comprising a combustihlc wrapi+cr, a body of tobacco contained by aaid +a'rapl+:r, and dry, avalcr-conlainiae deposits of a at•atcr-!to!utttc 5iii- catc on said wrapper cflectirclr proa'id;ng an all over pattSrn ni nnn-cnmblrttihlC avrn(+Pcr arcas sc, :trntcd by' conihustihlc avrai+pcr arc:ra. caclt of s:ad silic:ur dcpcni!s contlining :tt lea%t 0.00 Frani c:f sifica t•.'r squitrc cc^ti ' mctcr of u'raprer area covered by snid clct*rsit; hcin, lhcrchy adaptccf for fOllnlng up undcr thc hcaf of the burning cicirctrc In rrovidc a pratu,)cr:.ncc for t+cing intcrrcaseci hct+a•ccn thc burning portinn of thc ciprcttc and a srrltrrrrtin_ sur'facc ur.,lerhinp Ihc ci,irc•tti, anct for holding the hurnin: portion vf the cigarcrtc clcvatcd from lttc supPortinZ cutfacc. 2. A*cigarcttc conxtructinn cnmpriting a couahuttihle wrapper, a body of tnhacco cnntaincd hy said wrcittrcr and dcpoziis of clrti•, u•atcr-cenlttining sndinm silicatc on said' wrapper cffec•tia•cly proa•icliita an all ovcr pattern of ' non-cambuctihic ati-r.tprcr arcas .cparated by cnntlutstihlc wrapper areas, each of sai+t cilicatc dcpnsits conviining . ; at Icast 0.013 Frorn of silica per squarc ccntimctcr nf wta(t(?cr area cnacred by said dct+ncit• being thcrchv +.daprcd fnr foaming tip e+nder fhc hcat nf the h+rrnin:; cignrcttc lo prot•ide a protuberance for being intcrp.rccd hettvccn the h:trninp pnrtion of thc cigarcuc and a sup- -"` l+orting surfacc tUnderit-in- fhc cirarctte, and (nn cnIJine 30,th•clv providing an all over pattcrn of non-ccnt`~=;'t!. krarpcr areas scted h% cona+ustihfe ar;,t~p;r ~-z _y ,-_ cach of saiJ dcpocilc being ada~tcd for fo~n:in_ r~. '` under thc heat of the burning cigarcae to providc a tnhcr:+ncc' fon ceinc intcrpoccd hct:uccn (hc hurn;-); 35' lion of the ci=:rrcitc and a suPpvr'ting- surfacc nm!c:c;:+; • tiic cigircttc, and for- hohtirU-- thc hnrnin_ ~art:on n` ;L _ -- ,.ci;:,rcttc ctcv:itcit from thc surporting surfacc. • .-: ti. A- Cigarcttc c(lnafl+ctian cnmrri.in; . a ccn +.a•i4'.- , -rapper, a hiulv of toharcn contained hy s:Pi.t aar::mr„ ;0 nntT dry, avatcr-cont:cinin^ clcprnitc of a a.•.r,cr-•nluh'c.: •_ catc on s-iiJ a.•rapper cfl-c-tivciy pnovidin: an a!I ca•t• ':t?atlcrn af' nnn-enrnhustihic_ wrapper areas separa:e! ; Ilv comhu~tihlc wrapper arcac• each of ti'd 4tcltnaLs cnntaining at ]cast 0.013 gram nf silka p:- 4s '.;irarc ecntinictcr t,f wrapper arca emcrcd by s i: iicpncit, and cnntaininq tv.-.tcr of compa:itinn in ;n equal tn aD least 15 percent of the «•cicht' nf s7id aaid silicatc dcposit hcinc thwrchy adaPtcd 'fer ing tip uml.r lhc hcat c:f thc hurnatt, ci,.:trcttc Io prn:::t ` r.o -a protuberance for being intcrposcd hcta+~ccn 15: hu r;~: portion of ticc cicarctlc and a sunportin_ zr:rfa.c 1!•inr fltc cirarctiC• and fA+r hnhliag the hurnin; po:1,o: of thc cigarclfc clt;vatccl frorn thc s:rrportino sut(;:;c. :.i: Rcfcrsnccs C'i!c:l in the file of this r-atrnt US`71YCD S'fA'I-L•S PA71•A3TS ' 1.905.416 l.oav ----------------- Apr. '-5. 1'a: tho hurnine portion of the cigarette c!cvatcd f+orn Ilre sup- • 1+oriinr cnrfacc FOR[IGiM PATENT•$ , 3. A cigarctic construction rnnrrricing a comhusliblc n0 wrapper, a body of tobacco contained by said wrappcr, .'-' 22,141 •~ Great Britain o( 1°t'1 _. _ _. .,..a-.,. - 7 ~~~*+Sta ^a!~i~.l i gfY+'b:~'. 4. .. M . .` . 1 ?f , f. . a. -T r.

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