Tobacco Documents Online

t.-=1`-~.',• , . -_. r 'S:•:.-~F::::~.~ ~fi5`~~'M.'~ ,. i,y~'~,,."~•eZ'.: t~~~''-.'~~a,~r;;'s.!'~'~`3 '~k. 'Tq ^r•. i.'3Lfi *",~C~.~-,ik * ': ~. , ±.'::%n F r4~~~•~ 1 T F 0,-1 r,The Furniture FiammabilitEy Committee is currently conducting a search ~'~t{ ^x~ - ~~'.`11, • kiof the literature in order to identify systems for producing a cigarette' 3c:-r?'f9 1s..,...rc, xt,::r,~?~ ._•yf~:aes,,C.ji,,.,~y. .: •,.~j+ • ,~th- . :'~F ~ ~a.'hc,'a,{-.Ntf. F • ~,rhich will self-extin, guishr,y in 10 minutes or less: At this time, `we are t;vW;5Wix i".j~Y , :.: are of two approaches. :The first ofYthese is a compartmentalized cig- ~. ~S ~~ a~7 .< <~., i ~ay,,, '~SJ~~..~.•~,-2 ~, ?1J".1~d~~^„~t~ ~+riC ?a. ~~ „c]4' ~ ,, ,, ,; '~ W rt ~~~ r.s• ~'k`~ .~r'ii '~:'~2 yarette developed by T. H.#Borthwick on which we~are attempting to get. ' F'tr-ur ~` ~ ~,r. •., ~'~~~ ,~''`~ ~ : -~ '~,.• c`~~ •~=.~1~r v.~~ ~1- ~ . . . ~ ,,, more details A copy of the patent abstract is attached Thesecond ~s ~ ,based, on the scatete~.c,chnology of Charles ~Cohn of the Technical:Process . .:., . . ,,. .... . , Division of Colonial Alloys.Company, Phl ladelphia ~... .,~_.._ .v'~. ~ ' . .: ~ r~ 3 h• ~ r.. T ~;~~y=s In 1962, a patent was issued to Mr. Cohn (3,030,963, opy'attached): 11, ~'~~ • iy~: .'.; ~.~.::.-~), ~+v."~9~~r:i:crfa~ 5:,: . -}:, t °. 1 i :,' ~ r;-. ~: ^F ^: ~ ~~r:," Tt /- s~" ~• ~' . . ; ~s. . ~ ~rt f .,r ~ ~ ~ This patent disclosed a method fo treating.the paper of cigarettes`so tha the ca ac ~~4- 4a ,~ p ity of the cigarette to ignite or to char materials on which.it ' .-. .., . .. , . :-:.,:. ... ......~~.~. ., "::< ~..3'< __..:..:. ',,..'... •.,,: .: . . ,.. ;.. ;.., o ,>R. e ,'§~L~3e.' , - ... _ . . is'Tres.ting is greatly reduced. Mr.. Cohn applies a soluble"silicate. '"solution ... . ....N, ... «e . r..ri v r . i~ 2.1 . .. . - : . .. .._ . _ .. . . . -. . ., . ; .... . S.~ -~.`~`~1E: . - : ,: }tto the cigarette in a pattern so that.only part of the paper is treated. 41. ~~?,^ u'~ T `~ . . ... This of course, is because the silicates are generally fire retardants and, 4r: ~i e ..._. . .- . : ~".. : R..'._ .,j.:.: - ..s~ 4'.. . . ~i:.: i.' ~G~. '. •. ~,..,' . . . - :. - ~ ~ . ~ .:: .. r, l .~~ . .. ~_-,. /'~•.j4. .. ~`:: ;'S•.{.~F'~F.. 'a paper wholly treated with soluble silicates at a substantial level'-would ~ ~ : ,:. ,,.', _ ,. .,., ... , :, , .: ..: .~v~t:.,•::,~' r •: ,.~. <,: ;. - .: -.. . .,::. .. . ;;. . . ~.~. ~ .{~: ~, w•,.~~ -zm ..~ ; y_,. - . ~~,not burn at all. The inventor claims that the solution should be dried i~~~•~~ :;~7 .+ .:. .''- .. .. ..,f•„ r-~ 5~,.~=~ti za~::;h e . .r:~ '".- :~ - '.~,:,~.: .~..y..~ .. ..'~~+ i,.-~."~:;f 't :,:L'~iz . s,~;~~ down so as to leave some water of hydration within the spot or line of _ silicate This water does not dry out on storage and is released when the f- . . ,-.. .:_,i ..r : • . . .::: ~.,?~-""' .. ..t.,.^s_ . "heat of the burning tobacco reaches that portion of the paper The water . . :'- .,.'_'..,:',: ..'... . •v .~., . .:.~:~.. ~1,~~.+. .'Fy.~,.:~~. . .'~..~~ J i..~. . . . ~ •...,_ • .. :'R. ~_f- -, t~~' .r '.'t .,, .+.".i%,.7'>+SI ~,=Tthen foams the silicate composition which solidifies sothat an insulating . .-. . . ,: : , •~:r;. -, .::,:,. .:~~ u , r: _-; gap is provided between thecigarette and the surface on which it is resting. :d~c> t' t sw w^ r' . . . . . .. . -- .r.. . .:;..:. ., - ~,~~° The Cohn work indicates that the rate of burning of the cigarette is 'PS ~F-;;~~t,•Sc -~,.. . . . - - ..::1:,. p+:." :',: ..;•.:h ~r .,,:~-Fz o. -.:;`:; p.._ .,.' -.. ,. , ,.. .~, f~!~?_-:y`5-a ' .. A ([7~~. €~ slowed down between puffs by*the application of this material but aself-:~ y,~,kY~ . -. .:.:-.- .. . , . .. . . ..:.:.. - - '. ..:.:--:...:... .. .. . . ..:........ .. ,- .. . . . . . , ~:.- .-.-- - . ~.:~~, . =''.-:- T~ "~' . . . ,. , . .. ,. extinguishing cigarette is not claimed. Informally, however, Mr. Cohn has ', a • told us that by controlling the pattern of deposition of the silicate, a ,~ ,~, , .-... - , . .• . ,, . , ; ~~-~ self-extinguishing cigarette can be made. He claims to have additional tj$ }~, patent applications on fi'le, and we presume that these may cover the self- ,, ~ • .. -~;: extinguishing cigarette, although we have no definite information on this } `::5 ._. ~. • - . , . _ . . . . : - : i . .., , . : . . . . ,. ~ .. :- po nt 4 . F~,[~~e•"t+~ `-5.:• rt~.. . ';±N _ _. . _1 `•:~.1~ • . . .. .. ~ . _ _ ._ '^.~'~ ~I ]~ ..Af-'S "L.t~'~ief~''~

~~+~K ~~t , ~ s_ • :F ~ i, 5 r i~v an ,; ~ ? ~7~i` ~ .- ~' i ~ s ~ :~ }~~ Cohn also has sta a P ted that silicates have been applied to cigarette. 48 ' ';va F' t- t t v paper by a paper cornpany, and that the paper so treated has been successfully * run on cigarette-making machinery. He has asked for samples of upholstery ~„-+' '•" x4q '~~G`.~' "~ oFF `~' 7 .=.Jr,,,~,' r .r '~"r,r~ •~ r ~q4~~f'~;n}r•'a.F~sy :.- S abri~cs and has indicated that he will supply Guilford Laboratories, coi= ~. t.~ t.. _.~ _ . ( 'iv R W .sultants to the Furniture Flammability Committee, with samples of treated-° -~^~4~p~'~"~ ~,[ ZLf~` rs.'+ 6se: S rt ~ ~' ' s , ~ ~ t i . ~n ~ • . W~4•~~ 23r:jp~W"x4yW'•7*~ . - ° ~ '~[ d ~ -- + #sT(,43~, Mr. Cohn appears to be working extensively in the flammability prevention ,'4<~ .a area and has advanced various ideas for increasing the safety of book matches ~ .,e ,:4 1 ... ..' . as well as in cigarettes S,Te believe that he has a promising .approach which7° .-~7. y Is worthy of consideration It would seem to be adaptable to cigaretteT ..- t}./ T `;- 1tz~x ,tt manufacture without the need for major modifications to the production process.- .. ~ ~£~~3ug ,~ ~ t-~.- • ~~.~•~i~;;,S..: . r r_~:i :1 ti :x .,~f.}i.,1 ~~y ~ ` , r.e .X,a'S