CA1182023A - Making of smoking articles - Google Patents
Making of smoking articlesInfo
- Publication number
- CA1182023A CA1182023A CA000413993A CA413993A CA1182023A CA 1182023 A CA1182023 A CA 1182023A CA 000413993 A CA000413993 A CA 000413993A CA 413993 A CA413993 A CA 413993A CA 1182023 A CA1182023 A CA 1182023A
- Authority
- CA
- Canada
- Prior art keywords
- rod
- smoke
- smoking
- modifying agent
- lengths
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
- A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
- A24C5/14—Machines of the continuous-rod type
- A24C5/18—Forming the rod
- A24C5/1892—Forming the rod with additives, e.g. binding agent, flavorants
Landscapes
- Cigarettes, Filters, And Manufacturing Of Filters (AREA)
Abstract
ABSTRACT
In a method of making lengths of smoking-material rod, particularly cigarette lengths, smoking material and wrapper-web material are each continuously fed to a rod maker operable to wrap and seam-seal said wrapper mater-ial about said smoking material to provide smoking mater-ial rod which is fed to a cutter for cutting said rod into lengths and smoke-modifying agent is so applied intermittently to one of the said materials during their feeding to the rod maker that, in each of the said lengths, the smoke-modifying agent is distributed over one end zone which is accounted for by a few puffs, generally a first few puffs only, in the smoking of the length. Preferably tobacco material and wrapper-web material are each fed to a rod maker operable to wrap and seam-seal said web material about said tobacco mat-erial to form cigarette rod which is cut into cigarette lengths and smoke-modifying agent is so applied inter-mittently to one of the said materials during their feeding to the rod maker that, in each of the said lengths, the smoke-modifying agent is distributed over not less than 25% of each said length. Further smoke modifying agent may be distributed outside the said zone.
In a method of making lengths of smoking-material rod, particularly cigarette lengths, smoking material and wrapper-web material are each continuously fed to a rod maker operable to wrap and seam-seal said wrapper mater-ial about said smoking material to provide smoking mater-ial rod which is fed to a cutter for cutting said rod into lengths and smoke-modifying agent is so applied intermittently to one of the said materials during their feeding to the rod maker that, in each of the said lengths, the smoke-modifying agent is distributed over one end zone which is accounted for by a few puffs, generally a first few puffs only, in the smoking of the length. Preferably tobacco material and wrapper-web material are each fed to a rod maker operable to wrap and seam-seal said web material about said tobacco mat-erial to form cigarette rod which is cut into cigarette lengths and smoke-modifying agent is so applied inter-mittently to one of the said materials during their feeding to the rod maker that, in each of the said lengths, the smoke-modifying agent is distributed over not less than 25% of each said length. Further smoke modifying agent may be distributed outside the said zone.
Description
2~;23 Tllis invention relates to the making of smoking articles incorporating smoke-modifying agents.
It is well known to incorpnrate smoke-modifying agents in cigarettes and other smoking articles. Smoke-modifying agents include materials actiny to impart adesired flavour or aroma to the mainstream and/or side-stream smoke of a cigarette, and physiologically active agents or smoke-body enhancing agents acting to modiFy the smoker's perception of the quality of mainstream smoke.
It is an established practice in incarporating a smoke-modifying agent in the tobacco rods of cigarettes to apply the agent to the tobacco in such manner tha-t ;~ the agent is substantially uniformly distributed along the full length of the tobacco rod Advantages can, however, be obtai~ned from an~asymmetric distrlbution of a smoke-modifying agent. Asymmetric smoke-modifying agent distributions are described in United Klngdom Patent Specification No. 2 07~ 487A. That specification proposed methods for introducin9 smoke-modifying agents :: : :
into filter tipped cigarettes subsequent to the manufact ure thereof. These methods rely upon the entrainment of particles of smoke-modifying agent in a stream of a~r , : ~
~ induced to flow through each cigaret-te.
~:
~ ~25 It is an o~ject of the present invention to- provide :
!
, .
~2~
a practical method by which lengths of smoking material rod, cigarette rods for example, can be obtained having an asymmetric distribution of smoke-modifying agent, the method being consistent with and in~olving minimal departure from current high-speed rod-making technology.
It is a further object of the invention to provlde a method by the use of which there can be obtained uniform loadings of smoke-modifying agent from rod length to rod length.
The present invention provides a method of making lengths of s~oking material rod, wherein smoking material and wrapper~\Jeb material are each continuously fed to a rod maker operable to wrap and seam seal said wrapper-web material about said smol<ing material to provide smoking-material rod, said rod being fed to a cutter opor~ble to cut the rod :into uniform lengths, partlcular-ly cigarette lengths, and srnoke~modifying agent is 50 applied intermittently to one of said materials during the feeding thereof to said rod maker that, in each of the lengths of rod, said smoke-modifying agent is di~-tributed over one end zone, which zone is accounted for by a few puffs, particularly a first few puffs, in the smoking of the rod length.
The same or a different smol<e-modifying agent may be applied to the other o-f the materials during the -feed-ing thereof to the rod maker.
Advantageously, the zone extends -From one end of the length of smoking-material rod for a distance therealong accounted for by from two puffs to half the total number of puffs as measured when the rod length is rnachine smoked under standard conditions of 35 cc puffs of 2 seconds duration at one minute intervals.
In percentage terms, the zone of distribution of the smoke-modifying agent may occupy from l5D0, preferably at least 25r~ to 500D of the rod length In the portion of the length of smoking-material rod outside of the aforementioned zone there may be distributed another smoke-modifying agent. The latter may be of a different agent or of the same agent at a signif-icantly lower application leve:L than in the said zone.
There currently exists an interest in low-delivery cigarettes, that i~ to say cigarettes which, during smoking, give low mainstream-smoke deliveries of specif-ied 3rnoke constituents~ tar and nicotine for example.
~lowever, it has been observed that, in some cases, smokers of low-delivery cigarettes have registered some lack of satisfaction, in regard to Flavour for example, during the first few p~lffs. Cigarettes may be provided by use of the present invention which meet this problem if a smoke-modifying agent, for instance a tobaccO-flavour enhancer, is incorporated in a low-delivery cigarette over a portion of the length thereoF accounted for by the first ~5 few puffs, the first three to five puffs say The application level of the agent over this portion may be the same as that which would be adopted in accordance with the prior orthodox practice for distribution of the agent $~2q~
over the full length of the tobacco rod Alternatively~
it may be arranged that the quantity of agent applied to the portion in question of the ~obacco rod might be app-roximately equivalent to that which would have been applied over the full length of the rod, or an application level may be selected between or in excess of these values.
It is common practice to incorporate a fi]ter in cigarettes for the purpose of removing constituents of the mainstream smoke. Currently the preponderance of lU filter9 embody a plug formed of cellulose acetate fibres. Although cellulose acetate possesses a number of merits as a filtration material, it has a disadvantage when incorporated in filters oF cigarettes thc tobacco rods of which have been treated with a smoke-modifying ac~ent distributed along the fuLl length of the tobacpo rod. This is because cellulose acetate preferentially attracts some agents when they are incorporated in the tobacco rDd in a msnner such that they are free to migrate. Migration of a smoke-modifying agent to a cellulose acetate filter results in a reduction of the delivery of the agent when the cigarette is subsequently smoked because the agent does not, in most cases, transfer from the cellulose acetate to the smoke as readily as it does from the tobacco to the smoke. By use of the pres0nt invention, there may be provided improved filter cigarettes the tobacco rods of which incorporate a Free-to-migrate smoke-modifying ayent, since if the agent i5 applied to the rod at a zone thereof in the region of the end remote from the filter, the agent has less opportunity of migrating to the filter during storage su~sequent to cigarette manufact-ure. Thus, if a given quantity o~ smoke-modifying agent is applied at a forward end zone of the rod, instead of in accordance with prior practice, a significantly higher proportion of the agent will be available to fulfil the object for which it is used.
Cigarettes are known which are judged by some smokers thereof to produce in the last few puffs a mainstream smoke which is perceived to be of a harsh nature. Cigar-ettes may be provided by use of the present invention which embody a smoke-modifying agent in a portion thereof accounting for the last few puffs, the agents being ~olected to provide a smoothing effect counteracting the harshness of the mainstream smoke.
In cigarettes and other smoking artic~es made by the method in accordance with the present invention, the smoking material may be selected from one or more of cut tobacco, reconstituted tobacco and tobacco substitute material.
If, in accordance with the present invention, a smoke-modifying agent is to be applied to tobacco and/or to cigarette paper just before the entry thereof into a rod-mal<ing garniture of a cigarette making machine, -the agent, dissolved in a suitable volatile vehicle, may be 12~1~3 sprayed by use of an intermittently operating spray device Such device could be a spray device similar to that described in United Kingdom Patent Specification ~o. 1 357 057. The device according to that specification may be arranged to spray a liquid containing an aromatic substance onto a layer of tobacco at a location close to tile entry of a cigarette-maker garniture to which the tobacco is fed. In order to serve for the purpose of the present invention, the spray device woulo have to be mod-ified so as to operate intermittently in correct phasewith the rod cutter of the cigarette maker. As disclosed in Specif:Ltation No. 1357057, liquid is supplied to a spray nozzle by means of pressu~zed air. Modification of the spray device to adapt it for present purposes cauld comprise, for examp-ple, r~placement of the pressurized-air system by a pump operable to deliver predetermined ~uantities of liquicl adclitive to the noz%le.
If smoke-modifying agent is to be applied to rod wrapper, it may, as an alternative to being sprayed onto the wrapper web, be applied thereto by means of a cont-inously rotating rotary applicator operable to transfer the agent to the web from one or more portions of its periphery.
The preferred smoke-modifying agents suitable for use in the method according to the invention inherently have, or have irnparted to them, a limited propensity for migration. Thus if an agent is to be applied directly to the smoking material rod it should be of low volatility at arrlbient temperatures. A class of substantially non-volatile compounds is known which if applied to tobacco, release to the smoke thereof volatile smoke-modifying agents when -the tobacco is burned. Members of this class may be selected for use according to the present inventior,. They include polymers with pendent flavour molecules. They also include glycosides in which the alglycone is a flavourant material such as menthol, eugenol, ~ phenylethanol or benzylalcohol. Use may also be conveniently made of micro-encapsulated agents whether included in the smoking material or applied to the wrapper web.
There follows a description of a laboratory exper-iment which illu~trates advantages to be obtained from asymmetric distribution of a smol<e-modifying agent in clgarettes~
Filter tipped cigarettes were selected having a 64 mm long rod of cut flue-cured tobacco enwrapped in cigarette paper of an air permeability of 120 Coresta units. The filters were of cellulose acetate and were unventilated. These cigarettes when machine smoked under standard conditions had an average puff number oF 8.4.
A flavourant cornpound, coumarin, which was in radiolabelled form for analytical purposes, was dissolved in ethanol at a concentration level of 309 ug cm 3. The cigarettes were divided into three groups (A, B and C) and equal quantities, each of 10 ~ul, of the caumarin solution were introduced into -the tobacco rod of each of the cigarettes by means of a syringe. In the cigar-ettes of Group A the coumarin solution was deposited sub-stantially uniformly along the Full length of each tob-acco rod. In Group B the coumarin solution was depositedover the forward three-eighths of each tobacco rod, whereas in Group C it was deposited over the rearward three-eighths of each rod adjacent to the filter.
After injection, the cigarettes were stored for twenty-four hours. They were then machine-smoked under standard conditions ùntil the coal had reached the mid~
point of the tobacco rod9 at which time they were ex-tinguished by contact with crushed solid carbon dioxide.
Duriny the smoking period mains~tream total particulate matter (TPM) was collected on Cambridge filter pads and the mainstream vapuur phase componsnts were collected u~ing cooled ethanol contained in a glass-ball filled bubble trap.
The Cambridge filter pads, the remainin~ halves of the tobacco rod~ and the filters were individually subjected to ethanolic extraction using measured amounts of ethanol, Liquid scintillation techniques were therl used to count the radioactivity content of each of the ethanolic extracts and of solution from the bubble trap By this means a determination was made of the coumarin distribution on a percentage basis after smoking. The results are qiven in the table below.
2~23 Coumarin, Percentage Distribution . . . ~ , ~ _ Main- ¦ Side-Oroup Tobacco Filter strearn stream Smoke Smoke ~ t-A 4 6 . 1 6 . 3 7 . 8 3 9 . 8 . _ _~ _ B 4.5 8 .1 lQ.6 76.8 ... ~_ _ _ C 8 B . 5 3 . 2 2 . 3 6 . O
_ _ _ __ , The value for the percentage of the coumarin in the sidestream smoke was calculated on -the basis that all coumarin not accounted for in the tobacco, Filter and rno:instream ~moke would be in the siClestream smoke.
Inasmuch as a small proportion of the coumarin intro-duced into the cigarettes may have been lost by migration during the storage period preceding the smoking, these s:idestream values are possibly slightly in excess of the actual values. The results do though clearly show that the coumarin distributions after the smoking of half the tobacco rod, i.e. after about 4 puffs, i8 very different for the three groups of cigarettes. It can be seen, for example, that by distributing a quantity of coumarin over the forward half of the tobacco rod rather than over lS the full length thereof, the proportion of the coumarin entering the mainstream smoke during the smoking of the forward half of the rod is increased by 36o9 whereas that entering the sidestream smoke increases by 93~.
It is well known to incorpnrate smoke-modifying agents in cigarettes and other smoking articles. Smoke-modifying agents include materials actiny to impart adesired flavour or aroma to the mainstream and/or side-stream smoke of a cigarette, and physiologically active agents or smoke-body enhancing agents acting to modiFy the smoker's perception of the quality of mainstream smoke.
It is an established practice in incarporating a smoke-modifying agent in the tobacco rods of cigarettes to apply the agent to the tobacco in such manner tha-t ;~ the agent is substantially uniformly distributed along the full length of the tobacco rod Advantages can, however, be obtai~ned from an~asymmetric distrlbution of a smoke-modifying agent. Asymmetric smoke-modifying agent distributions are described in United Klngdom Patent Specification No. 2 07~ 487A. That specification proposed methods for introducin9 smoke-modifying agents :: : :
into filter tipped cigarettes subsequent to the manufact ure thereof. These methods rely upon the entrainment of particles of smoke-modifying agent in a stream of a~r , : ~
~ induced to flow through each cigaret-te.
~:
~ ~25 It is an o~ject of the present invention to- provide :
!
, .
~2~
a practical method by which lengths of smoking material rod, cigarette rods for example, can be obtained having an asymmetric distribution of smoke-modifying agent, the method being consistent with and in~olving minimal departure from current high-speed rod-making technology.
It is a further object of the invention to provlde a method by the use of which there can be obtained uniform loadings of smoke-modifying agent from rod length to rod length.
The present invention provides a method of making lengths of s~oking material rod, wherein smoking material and wrapper~\Jeb material are each continuously fed to a rod maker operable to wrap and seam seal said wrapper-web material about said smol<ing material to provide smoking-material rod, said rod being fed to a cutter opor~ble to cut the rod :into uniform lengths, partlcular-ly cigarette lengths, and srnoke~modifying agent is 50 applied intermittently to one of said materials during the feeding thereof to said rod maker that, in each of the lengths of rod, said smoke-modifying agent is di~-tributed over one end zone, which zone is accounted for by a few puffs, particularly a first few puffs, in the smoking of the rod length.
The same or a different smol<e-modifying agent may be applied to the other o-f the materials during the -feed-ing thereof to the rod maker.
Advantageously, the zone extends -From one end of the length of smoking-material rod for a distance therealong accounted for by from two puffs to half the total number of puffs as measured when the rod length is rnachine smoked under standard conditions of 35 cc puffs of 2 seconds duration at one minute intervals.
In percentage terms, the zone of distribution of the smoke-modifying agent may occupy from l5D0, preferably at least 25r~ to 500D of the rod length In the portion of the length of smoking-material rod outside of the aforementioned zone there may be distributed another smoke-modifying agent. The latter may be of a different agent or of the same agent at a signif-icantly lower application leve:L than in the said zone.
There currently exists an interest in low-delivery cigarettes, that i~ to say cigarettes which, during smoking, give low mainstream-smoke deliveries of specif-ied 3rnoke constituents~ tar and nicotine for example.
~lowever, it has been observed that, in some cases, smokers of low-delivery cigarettes have registered some lack of satisfaction, in regard to Flavour for example, during the first few p~lffs. Cigarettes may be provided by use of the present invention which meet this problem if a smoke-modifying agent, for instance a tobaccO-flavour enhancer, is incorporated in a low-delivery cigarette over a portion of the length thereoF accounted for by the first ~5 few puffs, the first three to five puffs say The application level of the agent over this portion may be the same as that which would be adopted in accordance with the prior orthodox practice for distribution of the agent $~2q~
over the full length of the tobacco rod Alternatively~
it may be arranged that the quantity of agent applied to the portion in question of the ~obacco rod might be app-roximately equivalent to that which would have been applied over the full length of the rod, or an application level may be selected between or in excess of these values.
It is common practice to incorporate a fi]ter in cigarettes for the purpose of removing constituents of the mainstream smoke. Currently the preponderance of lU filter9 embody a plug formed of cellulose acetate fibres. Although cellulose acetate possesses a number of merits as a filtration material, it has a disadvantage when incorporated in filters oF cigarettes thc tobacco rods of which have been treated with a smoke-modifying ac~ent distributed along the fuLl length of the tobacpo rod. This is because cellulose acetate preferentially attracts some agents when they are incorporated in the tobacco rDd in a msnner such that they are free to migrate. Migration of a smoke-modifying agent to a cellulose acetate filter results in a reduction of the delivery of the agent when the cigarette is subsequently smoked because the agent does not, in most cases, transfer from the cellulose acetate to the smoke as readily as it does from the tobacco to the smoke. By use of the pres0nt invention, there may be provided improved filter cigarettes the tobacco rods of which incorporate a Free-to-migrate smoke-modifying ayent, since if the agent i5 applied to the rod at a zone thereof in the region of the end remote from the filter, the agent has less opportunity of migrating to the filter during storage su~sequent to cigarette manufact-ure. Thus, if a given quantity o~ smoke-modifying agent is applied at a forward end zone of the rod, instead of in accordance with prior practice, a significantly higher proportion of the agent will be available to fulfil the object for which it is used.
Cigarettes are known which are judged by some smokers thereof to produce in the last few puffs a mainstream smoke which is perceived to be of a harsh nature. Cigar-ettes may be provided by use of the present invention which embody a smoke-modifying agent in a portion thereof accounting for the last few puffs, the agents being ~olected to provide a smoothing effect counteracting the harshness of the mainstream smoke.
In cigarettes and other smoking artic~es made by the method in accordance with the present invention, the smoking material may be selected from one or more of cut tobacco, reconstituted tobacco and tobacco substitute material.
If, in accordance with the present invention, a smoke-modifying agent is to be applied to tobacco and/or to cigarette paper just before the entry thereof into a rod-mal<ing garniture of a cigarette making machine, -the agent, dissolved in a suitable volatile vehicle, may be 12~1~3 sprayed by use of an intermittently operating spray device Such device could be a spray device similar to that described in United Kingdom Patent Specification ~o. 1 357 057. The device according to that specification may be arranged to spray a liquid containing an aromatic substance onto a layer of tobacco at a location close to tile entry of a cigarette-maker garniture to which the tobacco is fed. In order to serve for the purpose of the present invention, the spray device woulo have to be mod-ified so as to operate intermittently in correct phasewith the rod cutter of the cigarette maker. As disclosed in Specif:Ltation No. 1357057, liquid is supplied to a spray nozzle by means of pressu~zed air. Modification of the spray device to adapt it for present purposes cauld comprise, for examp-ple, r~placement of the pressurized-air system by a pump operable to deliver predetermined ~uantities of liquicl adclitive to the noz%le.
If smoke-modifying agent is to be applied to rod wrapper, it may, as an alternative to being sprayed onto the wrapper web, be applied thereto by means of a cont-inously rotating rotary applicator operable to transfer the agent to the web from one or more portions of its periphery.
The preferred smoke-modifying agents suitable for use in the method according to the invention inherently have, or have irnparted to them, a limited propensity for migration. Thus if an agent is to be applied directly to the smoking material rod it should be of low volatility at arrlbient temperatures. A class of substantially non-volatile compounds is known which if applied to tobacco, release to the smoke thereof volatile smoke-modifying agents when -the tobacco is burned. Members of this class may be selected for use according to the present inventior,. They include polymers with pendent flavour molecules. They also include glycosides in which the alglycone is a flavourant material such as menthol, eugenol, ~ phenylethanol or benzylalcohol. Use may also be conveniently made of micro-encapsulated agents whether included in the smoking material or applied to the wrapper web.
There follows a description of a laboratory exper-iment which illu~trates advantages to be obtained from asymmetric distribution of a smol<e-modifying agent in clgarettes~
Filter tipped cigarettes were selected having a 64 mm long rod of cut flue-cured tobacco enwrapped in cigarette paper of an air permeability of 120 Coresta units. The filters were of cellulose acetate and were unventilated. These cigarettes when machine smoked under standard conditions had an average puff number oF 8.4.
A flavourant cornpound, coumarin, which was in radiolabelled form for analytical purposes, was dissolved in ethanol at a concentration level of 309 ug cm 3. The cigarettes were divided into three groups (A, B and C) and equal quantities, each of 10 ~ul, of the caumarin solution were introduced into -the tobacco rod of each of the cigarettes by means of a syringe. In the cigar-ettes of Group A the coumarin solution was deposited sub-stantially uniformly along the Full length of each tob-acco rod. In Group B the coumarin solution was depositedover the forward three-eighths of each tobacco rod, whereas in Group C it was deposited over the rearward three-eighths of each rod adjacent to the filter.
After injection, the cigarettes were stored for twenty-four hours. They were then machine-smoked under standard conditions ùntil the coal had reached the mid~
point of the tobacco rod9 at which time they were ex-tinguished by contact with crushed solid carbon dioxide.
Duriny the smoking period mains~tream total particulate matter (TPM) was collected on Cambridge filter pads and the mainstream vapuur phase componsnts were collected u~ing cooled ethanol contained in a glass-ball filled bubble trap.
The Cambridge filter pads, the remainin~ halves of the tobacco rod~ and the filters were individually subjected to ethanolic extraction using measured amounts of ethanol, Liquid scintillation techniques were therl used to count the radioactivity content of each of the ethanolic extracts and of solution from the bubble trap By this means a determination was made of the coumarin distribution on a percentage basis after smoking. The results are qiven in the table below.
2~23 Coumarin, Percentage Distribution . . . ~ , ~ _ Main- ¦ Side-Oroup Tobacco Filter strearn stream Smoke Smoke ~ t-A 4 6 . 1 6 . 3 7 . 8 3 9 . 8 . _ _~ _ B 4.5 8 .1 lQ.6 76.8 ... ~_ _ _ C 8 B . 5 3 . 2 2 . 3 6 . O
_ _ _ __ , The value for the percentage of the coumarin in the sidestream smoke was calculated on -the basis that all coumarin not accounted for in the tobacco, Filter and rno:instream ~moke would be in the siClestream smoke.
Inasmuch as a small proportion of the coumarin intro-duced into the cigarettes may have been lost by migration during the storage period preceding the smoking, these s:idestream values are possibly slightly in excess of the actual values. The results do though clearly show that the coumarin distributions after the smoking of half the tobacco rod, i.e. after about 4 puffs, i8 very different for the three groups of cigarettes. It can be seen, for example, that by distributing a quantity of coumarin over the forward half of the tobacco rod rather than over lS the full length thereof, the proportion of the coumarin entering the mainstream smoke during the smoking of the forward half of the rod is increased by 36o9 whereas that entering the sidestream smoke increases by 93~.
Claims (6)
1. A method of making lengths of smoking-material rod wherein smoking material and wrapper-web material are each continuously fed to a rod maker, the web material is wrapped and seam-sealed about said smoking material to provide smoking-material rod, which is cut into uniform lengths, and smoke-modifying agent is so applied inter-mittently to one of the said materials during their feed-ing to the rod maker that, in each of the said lengths, the said agent is distributed over one end zone which is accounted for by a few puffs in the smoking of the rod length.
2. A method of making cigarettes, wherein cigarette-tobacco material and wrapper-web material are each contin-uously fed to a rod maker operable to wrap and seam-seal said web material about said tobacco material to form cigarette rod which is cut into cigarette lengths and smoke-modifying agent is so applied intermittently to one of the said materials during their feeding to the rod maker that, in each of the said lengths, the smoke-modifying agent is distributed over one end zone which is accounted for by a few puffs in the smoking of the said length.
3. A method according to claim 1 or 2, wherein the smoke-modifying agent is distributed over not less than 25% of each said length.
4. A method according to the claim 1 or 2, wherein the smoke-modifying agent is distributed, in each said length, over a zone accounting for a first few puffs only in the smoking of the said length.
5. A method according to claim 1, wherein further smoke-modifying agent is distributed over a portion of the rod which is outside the said zone.
6. A method according to claim 2, as applied to low-delivery cigarettes, wherein a tobacco-flavour enhancing agent is distributed over the said end zone.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8132620 | 1981-10-29 | ||
| GB81.32620 | 1981-10-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1182023A true CA1182023A (en) | 1985-02-05 |
Family
ID=10525476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000413993A Expired CA1182023A (en) | 1981-10-29 | 1982-10-22 | Making of smoking articles |
Country Status (4)
| Country | Link |
|---|---|
| AU (1) | AU557791B2 (en) |
| BR (1) | BR8206369A (en) |
| CA (1) | CA1182023A (en) |
| DE (1) | DE3240228A1 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1749582A (en) * | 1924-12-18 | 1930-03-04 | Tobacco Perfecting Corp | Method of improving cigarettes, cigars, and pipe cartridges |
| SE347863B (en) * | 1971-11-11 | 1972-08-21 | Svenska Tobaks Ab | |
| FR2462110A1 (en) * | 1979-07-30 | 1981-02-13 | Beretz Pierre | Cigarette with graded tobacco mixture - has strong tobacco at lighted end for initial smoking and weaker tobacco at filter end |
-
1982
- 1982-10-21 AU AU89659/82A patent/AU557791B2/en not_active Expired
- 1982-10-22 CA CA000413993A patent/CA1182023A/en not_active Expired
- 1982-10-29 BR BR8206369A patent/BR8206369A/en not_active IP Right Cessation
- 1982-10-29 DE DE19823240228 patent/DE3240228A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| AU8965982A (en) | 1983-05-05 |
| BR8206369A (en) | 1983-03-29 |
| DE3240228C2 (en) | 1990-07-12 |
| AU557791B2 (en) | 1987-01-08 |
| DE3240228A1 (en) | 1983-05-11 |
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