Improvements in or
7T_WC. ECUSTA PAPER CORFORAMS. a Cor-
poration orranised under the laws of the
State of Delaware. United States of America.
of Pisgah 'Forest, State of North Carolina.
5Uniied States of America. do hereby declare,
the invention, for which we pray that a
catent may be granted to us, and the method
by which 'it is to be performed. to be parti-
Cu'larly described in and by the following
lostatement:-
This in%ention relates generaily to cigar-
ettes and more particularly to an improved
cigarette having a filter stub or tip for the
tobacco smoke.
ISThe present invention provides a cigarette
comprising a wrapper. tobacco enclosed
within the wrapper and the combination of
a filter tip with a means for admitting air
from the surrounding atmosphere through
20the wall of the cigarettes
present invention also provides a
cigarette provided with a filter tip at the
mouth end and with openings to the atmos-
phere, said filter tip and said openings
25havin- resistances to the flow of air such
that the resistance of the composite cigar-
ette is substantially the same as that of a
cigarette of equal length filled entirely with
tobacco and not having said openings.
30The present invention further provides the
rrethod for reducing the concentration of
the various components of tobacco smoke
produced by a burning cigarette and simul-
taneously. iinprovitir the Este and smoking
35characteristics of the cigarette which com-
prises combining in said cigarette a filter tip
having a resistance to the flow of smoke
thcrethrough greater than the resistance of
an equal length of the cigarette tobacco
40enclo@ed withrin the cigarette wrapper with
means for attenuating the smoke by admit-
tiny atmospheric air through the cigarette
It has been proposed heretofore to provide
45cigarettes with a stub of absorbent paper.
c(;tton or other filtering medium to remove
undesired constituents from the tobacco
smoke. Such filters reduce the tar and nico-
[Arice 3s. Od.]
'PXrENT SPEOFICATION 7585429
Date of A Pplication and filing Complete Specificarion: Nor. 11. 1954.
No. 32669154.
Application made in United States ol America on Aug. 10, 1954.
Complete Specification Publisheil: Oct. 3. 1956-
Ind.-x at Acceptancza :-Clars 130, C11
COMPLETE SPECIFICATION
rclating to cigarettes
tine content of the smoke a substantial extent
bv mechanically retaining some of the parti- 5D
cLlates entrained in the smoke. Most. if
not all. of these filters, however, remove verv
little, if any. of the gaseous constituents 6f
the smoke including acrolein, bvdrocvanic
acid. carbon rnonc@xide and other h@ighlv 55
objectionable substances. Furthermore, t"n
order to be sufficiently effective to warrant
their use, it has been necessarv that the con-
struction of the filters be such'that thev offer
substantially more resistance to the 6o%%- of -60
air and s moke therethrough than would a
comparable length of conventional cigarette
tobacco of the same cross-section and corn-
pressed to the density of the avcra-ze cigar-
Cite. Expressed !'n common parlance, the 65
filter noticeably increases the " drag " or
"draw" on the cigarette u-hen the baooker -
pulls a normal volume of air and smoke
into his mouth during a puff. Consequently,
the heretofore available filter tip cigarettes 70
have not been entirely satisfactory, because
many smokers object to a cigarette which -
has 'a noticeably increased resistance or drag
to the flow Of Smoke Lherethrou-h. It has
been proposed. heretofore. to perforate the 75
wrapper of a conventional cigarette not
having a filter tip in order to decrease the
draft resistance of the cigarette but such
cigarettes have the disadvantage of imposing
too little resistance to the flow of smoke to 80
be acceptable to the a% erase smoker.
It is therefore an object of this invention
to impro%e the smoking characteristics of
cigarettes having a filter up. Another object
of this invention is to pro% ide a means for 85
reduc;n!! the ouantity of harmful gaseous
components. including acrolein. of the cigar-
ette smoke as well as reducing the particu-
late constituents thereof before the smoke
is delivered to tht mouth cf the smoker as go
the cigarette is consumed without seriously
impairing the smoking characteristics of thic
cigarette. Still another object of this inven-
tion is to provide a cigarette having an effcc-
tive filter tip which imposes a resistance to 95
gas RO%V in the neighborhood of the rcsist-
ance of a conventional cigarette not having
4
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BATCo document for Province of BritiSh Columbia 16 April 1999

'2758.429
a filter tip. A further object is to provide a
filter tipped cigarette having improved taste
characteristics. A more specific object of
this invention is to provide a cigarette
5ha%ine, a filter tip which has smoking charac-
tertstics comparable to the conventional
ci-arette not having a filter tip and which is
ZI@able of deliveriiie smoke which contains
less than the normal concentration of all
10components of cigarette smoke.
The foregoing objects. as well as others.
will become apparent from the following
description in conjunction with the accom-
paryins dravvin@. in which
is ricure I is a perspective view partially
in section of one embodiment of this inven-
tion
Figure 2 is a perspective view partially
in section of another embodiment of this
2D invention and
Firur.- illustrates in a perspective view,
also partialh- in section. a third embodiment
of this invention-
Generalh speaking. the objects of this
25invention are attained bv combining in a
cigarette a filter tip and means for admitting
SUMCIME air into the cigarette adjacent the
mouth end thereof to dilute the smoke bv
at least about 20 per cent./in accordanc e
30with one form of the invention. a series of
ormces of predetermined number and size
are provided in Eli.- %%-all of the cigarette
and they mav be located either in the clear-'
etle wrapper which encloses the tobacco
35column adjacent the filter tip. or they may
be located in the region of the filter tip or
in a mouth piece attached to the filter tip.
In another forin of the invention a cigarene
wrao-,er havine a zone of a substantiaby
40greater porosity in the region of the filter
tip than in the remainder thereof is utilized.
For example. the wrapper may be of a corn-
posiEc structure, the portion in the resion
of the filter tip having a substantially open
45structure similar to conventional stencil
tissue while the remainder of the wrapper
is conventional cigarette u.-rapping paper.
-ention
This in% is predicated upon the
disco%m that the smoke passing into a
50smoker's mouth from a filter tipped cigarette
can be attenuated. without detrimentally
affectina t @tasie of the tobacco smoke, ' so Ne
as to c6rnpensate for the difference between
the resistance of the filter tip to the passage
55of sinoke therethrough and the resistance
imposed by a tobacco column of similar
cross-section and lencth. Indeed. in most
instances the taste of the smoke of the filter
tipped cigarette is improved. In contradis-
60tinciion. the reaction of the smoker of an
ordinary unzipped cigarette is unfavour3bly
affected if the %Tapper is perforated./The
size and numb,-r of the orifices in the filter
tipped cicarette wall or the porosity of the
6S zone adjacent the filter tip which gives opti-
mum results will varv with the type of filter
utilized. but for the best resulti, insofar as
taste and improvement in smoking char2c.
teristics such.as improvement in draw of
the cigarette. is concerned. the porosity can IV
be such as to result in the dilution of the
smoke bv at least about 20 per cent./ The
inventiozi thus provides a means forl@rcatlv
reducing the concentration of the 16ariou's
components of the tobacco smoke bv corn- 75
bining a means for attenuating or diluting
the smoke with air and additionaky filtering
th smoke to
c ,absorb and adsorb constituents
therefrom,,-'
The filter tip or stub can be composed 801
of anv absorbent material with or without
adsorbents included therein but it is pre-
felled that one of the more effective absorb-
ent pa= filter tips be utilized. An% material
capable of adsorbing components from the 85
tobacco smoke or reactin therewith such
as. for example. activated charcoal. cuprous
chloride, aluminium hydroxide or the U-C
may be utilized.,At is preferred. however.
to 'use a combination of the porous zone go
provided by this invention and the filicr tip
disclosed in the co-pending application No.
30326154 or the filter tip of co-pendine
application No. 31488 _54 or the 61ter t'-.-p
described in the co'pending application No. 95
31647'54.These filters are particulariv
advantareousfor removing both particulate
and so in--rascous comporents from the
tobacco smoke but it has br:n found that
by combining these filters with a means for 100
attenuating the smoke the quantity of acro-
lein and o1her adsorbable gas components in
tobacco smoke can be even further reduced
and that this additional reduction is achieved
without seriously altering the drar 105
h%- the cista-rette' to the @ow of SM=d
without siricusly impairing the taste of the
smoke or otherwise dele@criouslv affectine
the smoking characteristics of the cigarette.
Indeed. as pointed out elsewhere h.-r.-in- the Ila
taste is improved. Maximum quantities of
acrolein are removed it the filter combined
with the porous zone in the cigarette
wrapper contains varticits of activated ch3r-
coal. In order that the cb-e:zi\ez of thisillS
invention are achieved. it is e5stential that,
the cigarette have a filter tic) or sinnilar res-:
triction at the mouth end thercnf whichi
imposes a greater resistance to the flo'.v oft
smoke therethrough than would a simiJ3rlv!I20
dimensioned column of tobacco of the dei-
sity ordinarily . utilized in c;garettes.
In the drawint. FiLure I illustrates Cale
embodiment of tfiis im-ention in which cicar-
ette I is composed of wrapper 2 enclos-ME
tobacco 6 and filter tip 3 and comprising the
cigarette wall. Wrapper 2 is provided with
a series of orifices 4 havinz a total area
such th3t sufficient air enters therethrough
to compensate for the difference betwein 130
the resistance to the flow of smoke irnposzd
by the filter 3 and the resistance of a com-
parable length of tobacco 6- Przferably.
filter 3 is formed in accordance with tfic
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BATCo document for Province of BritiSh Columbia 16 April 1999

758.429
3
method disclosed in the co-pending applica. of the orifices is equal to the average
tion Number 30326i54 referred to herem- resistance of a rod of tobacco 6 during the
befurc. Such a filter tip ordinarily imposes smokin of the cigarette, the volume of 70
9
a resistance to the flow of smoke cquivaient smokc drawn tbrouo the rod of tobacco 6
5 to a c-olumn of water 31 millimeters high from, the burning zone of the cigarette
proxi-
when the flow through the tip is 17.5 @1- durine a normal puff will averave a@
per second. The series of orifices 4 admit mateCv one-half that of the smoke oulled
sufficient air into the ci-Prette to compensate throuili the conventional ci-arctte,-' This 75
for the difference between this resistance of alone lowers the concentration 'and the
10 the filter tip and the resistance imposed by amount of smoke passing through -he
a similar Icnath. for example. 13 centimeters. cigarette by about one-half that which
of conventional cigarette tobacco corn- would pass through an ordinary cigarette.
pressed to the density of the average But if the filter retains any of the con- 90
cisaretie. stituents in the smoke the total reduction in
r i -In Figure 1. a cigarette I containing the concentration of the various constituents
IS
6 and filter j. similar to that R passing through the filter %vill be pro-
tobacco n- less. For example. if we
___.C@Ficurc 1. enclosed in wrapper 2 is shown r)ortio ateiv
8S
h a firm paper mouth piece 5 comprising assume that 30 per cent. of the particulates
@A"!,th t6e wrapper I the cigarette %wall, In in the smoke are retained by the filter, the
this embodiment the series of orifices 4 total reduction in the concentration and
PI- 20 having! a diameter similar to that of the amount of particulates passing through the
foreeoina ?-nino -inient are provided in the filtcr would be about 65 per c@`nt.
mouth piece in such a position that they In the above example. if the average drag go
will not become covered by the lips of the on the ciaarette is to be normal. tSe co
n-
25 smoker. ductance ;f th-- filter tip 3 would manifestly
In the embodiment illustrated in Figure 3, have to be equal to that of the sum of th'e
C.,': cigarette I containing tobacco 6 and @ltcr @ averacc conductance of the tobacco rod 6
has bccn provided %% ith a series of on=@ 4 and the conductance of the orifices 4. 95
extcndinc through wrapper 2 adjacent the Filter tips in common use with a conduc-
I-n this 'embodiment the air passes tance of this order will retain onh- about
directiv into a filter tiD 3 and is injected into 30,'.' of the o rticulates in the smoke'.
a Such
the various passagewa%s therethrough to lips during 'a normal nuff increase the dr3e
d
conipenswe for the resistance impose ',v on a convientioral cigarette durinp a normal 100
the filter tiD to the flow of smoke to such off bv more than about 401". Further.
35 extent that' the cigarette can be smoked as . 0
thev remove or retain no significant
casiiv as the conventional cigarette not Quantities of the constituents of -the cas
havii- a filter tip.
It @@s fundamental to this invention that phase of the smoke. In contrast. the
I cigarette of the prescrit invention. carr%ina 105
through a choice of predetermined number
a similar filter tin. but provided with the
.40and size of orifices 4. illustrated in the vari.
orifices of the example viven above. dealers
:ous embodiments of the drawing. the
to the smoker during each ncrmal puff
draz " required to pull a given volume of
on1v about 5014" US much of the -ascous
air and smoke through the filter tip can be con . stituenis of the smoke as IiJwould 110
adjusted to be equivalent to the drag receive from a convenrional cigarette with-
45required to pull an equal volume of smoke
-h a conventional cigarette not havint of the fielited
throu out a filter tip. The resistance
C@, cigarette having the combination of a filter
;a filter tip. This is accomplished by pr - -
tip and orific,-s in the cigarette wr-apper
viding the orifices 4 which introduce a
Z. ent thz filter is cquivaCcrit to a column 115
second Dath. in a?)'
parallel with the p3th 'C
of water about 70 mm. hi-h which is sub-
co ftouth ihe rod of tobacco 6. for air to inter r
stantially the same resistance as that of 'he (1@
the cigarette adiacent its mouth end. -
averat
_T c lightcd ordinary commercially avail
ThrouLli control of the size and number of
able ci=ircite not havin- a filter tin.
orifices .4. the resistance to flow in the
cigarette I is decreased to the extent that it is apparent from the fore-goine that !he 120
arctic provided by this invention ormides
55the filter 3 would increase the over-all cog
a means for attenuating the particulate as
- I resistance of the cigarette had not the well as the gaseous constituents of tobacco
:wrapper been perforated. -e is
Grdinarilv. in practicing this inventiori. it smoke and that moreover this obiecti%
triallv increasing 125
i iA preferred 1hat'th.- resistance of the filter accomplished without mate
60tipped cigarette be adjusted within a range or decreasing the resistanc,- of the cigarette
t it does not deviate by more than
such !hoL to the flow ;f gases therethrough. fhat is.
. improved smokinst
about 30 per cent. from the resistance of the a cigarette having
conventional cigarette. @ By way of example characteristics, insofar as taste and reduction
of the accomplishments d this7irtycrition. if of harmful constituents in the smoke is 130
i 65 the size of the orifices 4 provided in the concerned. is provided %%ithout at the same
wrapptr Of any one of the embodiments time introducing an undesirable charac-
thereof is prasciected so that the resistance teristic. Although the resistance of thz filter
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BATCo document for Province of BritiSh Columbia 16 April 1999

4 75S.429
tip at the mouth end of the cigarette %viH equivalent to a cclumn of water 70 mm.
varv over a wide rance. depending upon the hiSh -when the now of air and s-rok-c throuSh
cor@structiort of the -filter tip %iied. it is the cigarette is 17 S. cubic centimeters per
scidom ncccssary to use a filter wh:ch second. were smoked in a smokin-e machinc 70
5 irrpcscs a resistance to the flow of gases which takes a 2 second puff once a minute.
th.--rethrou.-h Srmtcr than about 5 times the each puff pulling 35.cc. of air and smoke
resizarcc ef @- column ef cigarette tobacco through the cirarette into a smoke collector. -
of catial Icrclh ard cor.-presscd io the same After a 47 mm. length of cigarette had been
%@X!Cnt as tebacco is compressed in a ccasumcd. the cigarettes %%-ere discarded. 73
10 cj.,:iTc,.:&. It is preferred .h3t Utie resistance On the averasc. 9.:1 puffs per cigarette were
ol the fiker tip or restriction be about 25 per required. Tfic smoke thus clAlected %as
cent. to about 775 per cent. that of the carefully dissolved in a solvent consistent
resistance of the original. untipped, un- of 3 p@rts of ethyl alcohol and 2 parts
perfcrated civarcite wliert first ligiiied. For toluol bv volume .. the solution transferred
15 besi results. it is prz-ferredd that the resistance to a vveiihing bottle. the solvent evaporated
c to the flow of at rcc-m- tcritperature. the residue beater
i--tc roore than overnight at 9-5-C.. and %weighed. The.
the resLqance of residue amounted to 25.6 milligrams per
i% rical unt i-,!red ciprette. cicartite- 83
Other cigarettes from the same carton
20 The resistance imposed by a filter of a
given construction has been found to varv were imila.
s rl% smoked and the ps phase of
oniv a slicht extent from one filter stub to the smoke anahzed for acrolein. It was
another. It is. theTeforepossible to deter- found that on the averare a total cf UZI.;
mint by experiment the averace resistance merns. of acrolcin per citarette passed into go
25 im:%,@sea b%- a filter of a particular consLruc- thc collector.
tion and then to per.'orate the %Mpper while
ih-- cicarette is in the testing apparatus until EXPERIMENT
the resistance to the flow of smoke is To similar ci -ere -3
TCduced to the desired resistance. After the. _carettes %% ffixed filters
30 p@opcr size and number of crifices has thus formed in accordance with the method dis-
closed in co-pending apDlic--;ion No. 95
been determined. similar perforations can
303-05, '54 comprised of crumpled tissue
thc-n be placed in cigarettes as they are '@L - -
par-er prepared from cellulose fib%-ri only
imnufactur-ed to provide 623rettes crii6ody slightly beaten prior to the forin-tiort of th@
ing
this invention. As indicated herein-
shett. The ii-Iter. %vas 13, mile loag. To Z
35 bJOre the desired resistance is substantially keep the over"all I.-aph (',f the filhtr-tip-,mi 100
e4ual to that of a commercial available cicarette the same
as that of th.- C.-I-inal
cicarzate not having a filter tip or. in other
Cicarette. a 13 mm. length of the tobacco rod
uords. in tvpical cigarettes equivalent to a
as cut off the free end of the cigarette
column ef water about 70 mm. bich when @J-crc the filter-tipped cirarette. vas
smoked
40 gas is flowing through the lighted cigarette in the smokiri@ macfiine. Laboratorv 105
at the rate of 174 cc. rsecond. measurements showed that in or 4--r to suct,
Pe
if it is desirci that less of the particulates 17.5 cc. of air and smoke Nr throuth
be filtered out for a tivei attenuation of the the lighted filter-tip-ped _ci-arcae with an
I CLInstituents of the gas phase. a less eflective over-all Jength of 70 mm* a - drat - or
45 Fher tip is used on the cigarette of the
suction equivalent to a column of water 110 I
present invention. By .;:n%- of example. this S6 mm. hich now had to be arplied. As in
can bt accomplished without lowering the
tte case of the untipped ciparcites of Expert'-
if the filter
resistance to Pow through the tip ment I- an avem e of 9-5 puds were required
is comprised of crumpled tissue paper pre- 9
pcr ciprette to reJuce the I.-rL-.h of the
p3red from hichly beaten pulp. As the
arette
retentivitv of the stub for particulates of; . I MM. 115
arnro3c6is z.-r,,. and Elie stub thereby The wc;zht ed' coj!ec@ed
163 rnzm@ c,.-r Th-- %%:-rhi of
becomes no more than a restriction. the
acroltin found in th: smoke massir,- into the
extent of the reduction in concentration of
smoke collector avcr3ped 0.02-4 mrms.
55 the particulates in the smoke manifestly C Z
Thus. the filter tip rcinoved 16e.. or ;be 120
approaches that of the gas phase until. in
Particulates and none of ire gaseous
the limit. thev becorre nital.
=o1ein.
Typical test data which illustrates the
diffirence between the conventional cigar- EXPERIMENT 3
60 ene and those of the present invention are Armher set of these filt.-r-iip7,c:! cizare-es
as follows: was h.-n rrep:red. but in this cast. -lo tiny U'S
EXPERMIE;\T I ho',cs were pricked through th Etc
- eiciare
-ra fi;ter and
Conventional untipped cigarettes 7D milU- v pper near the juncture vt the
@i-ure 1.
meters long by 26 mm. in circumference.. the tobacco rod. as indicawd in
65 weighing on the average 1.00 gram each. The size of the holes was such that tfic drat
and' ha@Wg after bcW'9_ lighted a "drag' neces.,mry to pull 17.5 cc. r---. second of 3& M
r
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BATCo document for Province of BritiSh Columbia 16 April 1999

758.429
and smoke through the tip at the start of It becomes apparent from the forzccina
smotant was CV31621cnt to a column of that the event to which the particulate
water 70 mm. high. On th,- av&rard. phase and the gaseous phase of the smoke
-is were now required to consurne -ntmtion and in total 6S
PU' @he can be reduced in conc.
5 same length of. tobacco rod as in the amount entering the smoker's mouth is con.
trollably varia6le over a wide ranre by the
previous xperiment. E3ch of the cicaret-cs
was found to deposit on the a%eruie IO.S cigarette manufacturer through th@_seliction
nierns. of smoke in the smoke collector : the of various appropriate combinations of filter
Wchzht of acrolcin found passing into the tip resistances. filter capacities, and by-pass 79
10 colre-tor a%eragcd 0.018 nLarns. per cicLr.:-te. orifict resistances.
It s thus n that the oridcts P-rl,k-td Although various embodiments have b-..n
tl@rotn':h tht sciecrette wranNr not o,
.11v described in d-.tail in the foregoing for Oe
reduztl the irag ef t@e` illcrtippca Purpose of illustration many modifications
6--arcues frorn an initial value of S6 mm. Will occur to those skilled in'the art and can 75
15 down It:) 70 mm- i.e.. to that of tht untipped h., made without departing from the scope
the of the i as is limited b%- the
ciLare:tz- of Experiment 1. but lowered nvention except
particulates passing into the collector 5M. appended claims.
as co.-nnared mvilli the untio zd cizarette, aid
. p
tht a,,n,'1;;nz of acrolein by ZS'_@. 'What ivc claim is:-
I.A ciprette comprising a -w.-3p;vr.
20 EXPERIMENT whacco e. - closed with-In tht@ uTapper and 90
In ano:her ecoenmcrt. the filtzr was the combination of a filter tip with a means
for admitting air from the surrounding
c-rnmisc-d of tiss'u-c prcpared from hichly atmosphere through the wall of the-
beatin cellulase fibers. Its resistance to-the
cigarette.
fow of air and smoke vas the same . as in A cigarette according to claim I haiing
25Expz-ninent '. Ir th;- present experiment.
the one or more orifices in said. wrap;cr in the
ti'@- fil:c- tio removed cnlv Of proximity of said tip.
-:article,&,,; from t:n.- smoke. and since t1wre
A citarette according to claim
'X@1.7e nl@ b%-pass holes pfizked throueb 1@ .2 wiercin sa-id orifte or orific.-s :!re of 90
cuantiiv of acrolein 1@r Lae
as in the case of an predetertnined dimensions. said dimensions
30 5-M-01,- %%-as tl'-e same be-ing such that the resistance to the dow
uraipp'a cizarette. of sFnoke and air through the filter tipped
cigarette is not substan'iially greater than
EXPERPIENT .5 t@at to the flow of smoke through a 95
_YwiLh
When. hovLever. cieareies such as three cigarette of equal lenrilt cntircly 6!1.-
t:5;-d in Exnarkncnt 4 were pro%ided %xith Obacco and not ha'%ing said ori.4.ce or
35h;: %in% -1.11:1CCs 51% 35 10 bring the drag back orifices.
tc- that of an c4preuc. the weicht 4. A ci arette acccrdling to cl2ilm I coi-
p2s'sine into the smoke @01- tainint op@enings in th;: wall of the cicarea.- 100
le:zor uas 4_' -, less @han in the case of the to the a6iicspEere in the region of th--- filter
uniiDr-i cigzr,-tEc_ and the wei
ght of tip, said filter tip having a resistance at least
4( acr@iein was reduced h%. 3""O'. about that of th@'e untipped ch-prette.
and said openings having a resistance to the
EXPERIMEVT 6 flow of air such that the drawira resistance I(S
In Ex7zriment 6. a filter tip of the sam of tht filter-tipped cigarette is subszartiallv
the same as that of an vther--i@z similar
as in Exr.-rirre-it I was used. untipNJ. un@-.-rforatcd--vall cicaretie.
It'%vas coln-prised of p-jvr mude from pulp
45 L-,-uEen to @n intermediate extreme and cca- 5. A cigarette providei wil a I.;It.-r tip
at the mo@Lli end and'with openings to th;: 110
taininz 4.7-1, of activated charcoal. The
N%dizhi of particulates entering -.he smoke atmosphere. said filter tip and said -openings
havine resistance to the flow of air such 6-at -
collector was found to be -'I "@ less than that the resistance of the filter-ti@pcd cirar.-ne
of the untipp.-d cigarettc of Experiment I -. _ substantially the same as that_cf a
50b--zau:-;: of tit presence of activated
cigarcue of equal 1-.nrth filled enti7tllk- with 115
Charcoal in th-- filter t;p. the quarti(V of
a tobacco ard not ha%irg said operates.
-rol.-in in as 6. A cigarette 2czording to cl'@_im 5
zh.- smok: w less by ::6'
w I herein th: resistance of the filter tip and
EXPERIMENT 7
the size of the openings is such that the
When the filter tip such as that used in concentration of smok-c drawn from the 1@-O:
'S I :!
55 Experiment 6 was provided with tiny orifices cigarette is at least about 'W". le. h n
in ihe cizirettem-rapixr to bring the " drag - th@at drawn from a cigarette of equal 1:n:th
b2ck to that of an untipped. ci;arette, the filled entirely with tobacco and not ha%irc
w,-;,-ht of particulates passing into the smoke said opanin@s while the drawing resist:=_-
collector was found to be reduced bv- 5401-31 is subsmntialtv the =me.
60 as co-ya-red with the untipped cigarette. 7. A cigarette according to ary of thc
acd Eb weight of acrolein ky 4800. preceding claims wherein said filter tip is
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BATCo document for Province of BritiSh Columbia 16 April 1999

6 75S.429
capable of retaining less than about 20". %%-rapper with means for attenuatin the
9
the weirht of particulates in the smoke smoke by admitting atmospheric air through
sing iltroggh IL the cigarette Wau.
PT A cigarette accordinge to any of the . 13- The method according to claim 12. 35
5pre "-ing claims whertin said h1ter tip wherein the means for attenuating! the
contains an absorbent for substances com- smoke is adiacent said filters.
prisin; the gas phase of cigarette smoke.
14.A method according to claim 13
9. A cigarette provided with a filter tip which comprises providing
and with wall openings to the atmosphere an opening to
10in the region of the ifItcr tip. said filter tip the atmosphere through the cigarette wall in 40
the region of the mouth end of the cigarette
coni2trint a reagent for substances com-
pri;inr Se gas phase of cicarcite smoke. such that the over-all flow resistance of the
10. A cigarette according to claim 9 cigarette is substantially the sam: as that of
ub,-rein said openings bave-a resistance to an oth.-mise similar un-tipped unperforated-
wall cicarette- 45
15the Flow of air such that the resistance of
IS. A method according to claim 13 or 14
the filter-tipped cicarette is substantially the
I same as that it an otherwise su'nilar which comprises perforating the wall of the
untipped, unperforated-n-all cigarette. cigarette in the proximity of the filter tip.
I 1. A citarette according to an@- of the 16. A cigarette constructed substantial
h-rcin d@scribed with particular reference 50
20pre-ceding claims wherein said illter tip as
activated charcoal. -n in the
contains to anN of the embodiments sbo%%
12. The method for reducing the concen-accompan%ing dravings.
trat ion of the various comNnenm of iob"-co t7. The method of simultaneously irn-
srncke produced by a buming cirarene and proving the taste and smoking characteristics
25 siniultancousIv improvin the taste and of a cirarene substantially as bcrein 55
smoKing characteristics of the cigarette described-
,.which comprises combining in said cigarette
a filter tip having a resistance to the flow of STEVENS. LANGNER. PARRY
Smoke therethrour-It treater than the & ROLLINSOS,
@O resistance of an equal leigth or the cirarene Chartered Patent Agaents.
tobacco enclos.-d within the cigarette Arents for the Applicants.
Printed by Her 'Majestys Stationery Office PreSs. Abbey Orchud Street- S.%V.1@1956
Published at &he Patent O&m 25. Southam on BuildioM London. W.Ca. from which cities
way bLi,.d
CD
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C-D
BATCo document for Province of BritiSh Columbia 16 April 1999

.758,429 COMPLETE SPECIFICATION
1 S@w This drowinj Is a reproduaJon of
the Oritinaf on a reeaced scale.
FIG. I
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4
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FIG. 2
F IG. 5
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BATCO document for Province of British Columbia 16 April 1999