CA2438908A1 - Cigarette and filter with downstream flavor addition - Google Patents

Cigarette and filter with downstream flavor addition Download PDF

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Publication number
CA2438908A1
CA2438908A1 CA002438908A CA2438908A CA2438908A1 CA 2438908 A1 CA2438908 A1 CA 2438908A1 CA 002438908 A CA002438908 A CA 002438908A CA 2438908 A CA2438908 A CA 2438908A CA 2438908 A1 CA2438908 A1 CA 2438908A1
Authority
CA
Canada
Prior art keywords
filter
cigarette
flavor
adsorbent
component
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.)
Granted
Application number
CA002438908A
Other languages
French (fr)
Other versions
CA2438908C (en
Inventor
Richard Jupe
Rowland William Dwyer
Don Earl Laslie
Arlington L. Finley
Barbara G. Taylor
Cecil M. Smith
Vivian E. Willis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philip Morris Products Inc
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=29782355&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2438908(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Publication of CA2438908A1 publication Critical patent/CA2438908A1/en
Application granted granted Critical
Publication of CA2438908C publication Critical patent/CA2438908C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/04—Tobacco smoke filters characterised by their shape or structure
    • A24D3/048—Tobacco smoke filters characterised by their shape or structure containing additives
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/14—Use of materials for tobacco smoke filters of organic materials as additive
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/16—Use of materials for tobacco smoke filters of inorganic materials
    • A24D3/163—Carbon

Abstract

A cigarette (10) comprises a tobacco rod (12) and a multi-component filter (14) comprising a bed of adsorbent (15) and a flavor-releasing filter segmen t (17) located downstream of the bed of adsorbent (15). In the preferred embodiment, the adsorbent is also flavor-bearing and comprises high surface area, activated carbon (20). As mainstream smoke is drawn through the upstre am portion of the filter (14), gas phase smoke constituents are removed and flavor is released from the adsorbent bed (15). Thereafter additional flavor is released into the mainstream smoke as it passes through the flavor- releasing filter segment (17). Ventilation (24) is provided to limit the amount of tobacco being combusted during each puff and is arranged at a location spaced downstream from the adsorbent bed (15) to lower mainstream smoke velocity through the adsorbent bed (15).

Claims (43)

1. A cigarette comprising a tobacco rod and a multi-component filter comprising a bed of adsorbent and ventilation at a location downstream of said bed of adsorbent, said bed of adsorbent and ventilation constructed and arranged to substantially remove of at least one smoke constituent from mainstream tobacco smoke as mainstream smoke is drawn through the filter, and at least one flavor-releasing component constructed and arranged to release flavor to mainstream smoke, the flavor-releasing filter component being located downstream of the said bed of adsorbent in a direction of mainstream smoke drawn through the filter.
2. The cigarette as in claim 1, wherein said bed of adsorbent includes a flavorant-bearing, activated carbon.
3. The cigarette as in claim 2, wherein the flavor-releasing filter component includes a flavorant-bearing filament located downstream of said flavorant-bearing, activated carbon.
4. The cigarette as in claim 3, wherein said bed of adsorbent is disposed in a cavity defined between a tobacco end filter component and a central filter component, said cavity in a condition of being at least 85% filled.
5. The cigarette as claimed in claim 4, wherein said tobacco end filter end component is located adjacent said tobacco rod, said central filter component having an end portion adjacent said of adsorbent, said filtration at a location along said adjacent upstream end portion of said central filter component.
6. The cigarette as in claim 5, wherein said ventilation in the range of 45 to 55%, and wherein said multi-component filter further comprises mouth end filter component downstream of said central filter component.
7. The cigarette as in claim 6, wherein said tobacco end filter segment, said central filter component, said adsorbent bed and said mouth end filter component are of low particulate filtration efficiency.
8. The cigarette as in claim 7, wherein the level of resistance to draw of said mouth end component and said central filter component is greater than the resistance to draw of said tobacco end filter component.
9. The cigarette as in claim 8, wherein said ventilation comprises a circumferential row of perforations through a tipping paper, said tipping paper attaching said multi-component filter to said tobacco filter rod.
10. The cigarette as in claim 9, wherein said ventilation is located at least mm from a buccal end of the cigarette.
11. The cigarette as in claim 3, wherein the flavor-releasing component includes a cellulose acetate plug with flavorant thereon.
12. The cigarette as in claim 3, wherein the flavor-releasing component includes a cellulose acetate plug surrounded by plug wrap with flavorant on the plug wrap.
13. The cigarette as in claim 3, wherein the adsorbent-bearing segment comprises activated carbon of at least 90 mg in a fully filled condition.
14. The cigarette as in claim 3, wherein the adsorbent bed comprises a high surface area activated carbon; at least 90 to 120 mg or greater of said carbon in a fully filled condition or 160 to 180 mg or greater of said carbon in a 85 filled condition or better.
15. The cigarette as in claim 3, wherein the adsorbent bed comprises a high surface area activated carbon of at least 90 to 120 mg in fully filled condition.
16. The cigarette as in claim 1, wherein the multi-component filter includes a component in the form of a plug defining a flow path with a transition from generally circular to generally annular to thereby produce an increased pressure drop and increased dwell time of mainstream tobacco smoke in the filter.
17. The cigarette as in claim 1, wherein the multi-component filter includes a component in the form of a plug providing a flow constriction downstream of the adsorbent bed.
18. The cigarette as in claim 17, wherein the plug providing the flow constriction downstream of the adsorbent bed defines an annular flow path.
19. The cigarette as in claim 17, wherein the plug providing the flow constriction downstream of the adsorbent bed defines a central flow path.
20. The cigarette as in claim 17, wherein the plug providing the flow constriction downstream of the adsorbent bed comprises a concentric filter.
21. A multi-component filter of a smoking article comprising:
an absorbent bearing segment adjacent an upstream end portion of the filter, the absorbent bearing segment having a particulate efficiency in the range 10-20%
and a lesser RTD;
an RTD-inducing segment including a flow constriction and ventilation, the RTD-inducing segment being located at an intermediate location along said filter, the RTD-inducing segment having a particulate efficiency in the range of 10-20%; and a flavor releasing segment at a downstream location along said filter, said flavor releasing segment having a particulate efficiency in the range 10-20% and a lesser RTD;
the lesser RTD being less than an RTD of the RTD inducing segment.
22. The multi-component filter as in claim 21, wherein the ventilation is adjacent an upstream end portion of the RTD-inducing segment.
23. A cigarette comprising a tobacco rod and a multi-component filter comprising at least one adsorbent-bearing flavor-releasing segment constructed and arranged to release flavor into mainstream tobacco smoke and to remove at least one smoke constituent from mainstream tobacco smoke as mainstream smoke is drawn through the filter, and at least one additional flavor-releasing segment constructed and arranged to release added flavor to mainstream smoke, the additional flavor-releasing segment being located downstream of the adsorbent-bearing flavor-releasing segment in a direction of mainstream smoke drawn through the filter.
24. The cigarette as in claim 23, wherein the additional flavor-releasing segment includes yarn with flavorant thereon.
25. The cigarette as in claim 23, wherein the adsorbent-bearing flavor-releasing segment includes activated carbon with flavorant on the carbon.
26. The cigarette as in claim 23, wherein the adsorbent-bearing flavor-releasing segment includes three filter components including activated carbon with flavorant on the carbon and cellulose acetate tow components on opposite sides of the activated carbon.
27. The cigarette as in claim 23, including tipping paper surrounding the multi-component filter, and perforations in the tipping paper downstream from the adsorbent-bearing flavor-releasing segment for introducing ambient air into mainstream tobacco smoke drawn through the filter.
28. The cigarette as in claim 23, wherein the additional flavor-releasing segment includes a cellulose acetate plug with flavorant thereon.
29. The cigarette as in claim 23, wherein the additional flavor-releasing segment includes a cellulose acetate plug surrounded by plug wrap with flavorant on the plug wrap.
30. The cigarette as in claim 23, wherein the adsorbent-bearing flavor-releasing segment includes carbon granules with flavorant on the granules.
31. The cigarette as in claim 30, wherein the adsorbent-bearing flavor-releasing segment includes at least 90 to 120 mg or greater of said carbon in a fully filled condition or 160 to 180 mg or greater of said carbon in a 85 filled condition or better.
32. A cigarette comprising a tobacco rod and a multi-component filter comprising:
a bed of adsorbent and a flavor-releasing filter segment located downstream of the bed of adsorbent, said adsorbent being flavor-bearing and comprising high surface area, activated carbon so that as mainstream smoke is drawn through the upstream portion of the filter, gas phase smoke constituents are removed and flavor is released from the adsorbent bed and thereafter additional flavor is released into the mainstream smoke as it passes through the flavor-releasing filter segment;
filter ventilation arranged at a location spaced downstream from the adsorbent bed so as to lower mainstream smoke velocity through the adsorbent bed; and said carbon bed comprising at least 90 to120 mg or greater of said carbon in a fully filled condition or 160 to 180 mg or greater of said carbon in a 85 filled condition or better;
wherein said cigarette achieves a significant reduction in a gas phase constituent of the mainstream smoke.
33 33. The cigarette as in claim 32, wherein cigarette that achieves significant reductions in gas phase constituents of the mainstream smoke, including 90%
reductions or greater in 1, 3 butadiene, acrolein, isoprene, propionaldehyde, acrylonitrile, benzene, toluene and styrene.
34. The cigarette as in claim 32, wherein cigarette that achieves significant reductions in gas phase constituents of the mainstream smoke, including 80%
reductions or greater in acetaldehyde and hydrogen cyanide.
35. A cigarette comprising a tobacco rod and a multi-component filter comprising:
a bed of adsorbent comprising a high surface area, activated carbon so that as mainstream smoke is drawn through the upstream portion of the filter, gas phase smoke constituents are removed;
filter ventilation arranged at a location spaced downstream from the adsorbent bed so as to lower mainstream smoke velocity through the adsorbent bed; and said carbon bed comprising at least 90 to120 mg or greater of said carbon in a fully filled condition or 160 to 180 mg or greater of said carbon in a 85 filled condition or better; and said filter ventilation being spaced from a mouth end of said cigarette by at least approximately 12mm;
wherein said cigarette achieves a significant reduction in a gas phase constituent of the mainstream smoke.
36. A multi-component cigarette filter comprising at least one adsorbent-bearing flavor-releasing segment constructed and arranged to release flavor into mainstream tobacco smoke and to remove at least one smoke constituent from mainstream tobacco smoke, and at least one additional flavor-releasing segment constructed and arranged to release added flavor to mainstream smoke, the additional flavor-releasing segment being located downstream of the adsorbent-bearing flavor-releasing.
37. The filter as in claim 36, wherein the additional flavor-releasing segment includes yarn with flavorant thereon.
38. The filter as in claim 36, wherein the adsorbent-bearing flavor-releasing segment includes activated carbon with flavorant on the carbon.
39. The filter as in claim 36, wherein the adsorbent-bearing flavor-releasing segment includes three filter components including activated carbon with flavorant on the carbon and cellulose acetate tow components on opposite sides of the activated carbon.
40. The filter as in claim 36, wherein the additional flavor-releasing segment includes a cellulose acetate plug with flavorant thereon.
41. The filter as in claim 36, wherein the additional flavor-releasing segment includes a cellulose acetate plug surrounded by plug wrap with flavorant on the plug wrap.
42. The filter as in claim 36, wherein the adsorbent-bearing flavor-releasing segment includes carbon granules with flavorant on the granules.
43. The filter as in claim 42, wherein the adsorbent-bearing flavor-releasing segment includes at least 90 to 120 mg or greater of said carbon in a fully filled condition or 160 to 180 mg or greater of said carbon in a 85 filled condition or better.
CA2438908A 2001-02-22 2002-02-22 Cigarette and filter with downstream flavor addition Expired - Fee Related CA2438908C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US27069801P 2001-02-22 2001-02-22
US60/270,698 2001-02-22
US29242601P 2001-05-21 2001-05-21
US60/292,426 2001-05-21
PCT/US2002/005149 WO2002069745A1 (en) 2001-02-22 2002-02-22 Cigarette and filter with downstream flavor addition

Publications (2)

Publication Number Publication Date
CA2438908A1 true CA2438908A1 (en) 2002-09-12
CA2438908C CA2438908C (en) 2010-08-17

Family

ID=29782355

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2438908A Expired - Fee Related CA2438908C (en) 2001-02-22 2002-02-22 Cigarette and filter with downstream flavor addition

Country Status (24)

Country Link
US (2) US6761174B2 (en)
EP (1) EP1377184B2 (en)
JP (1) JP4028802B2 (en)
KR (1) KR100908752B1 (en)
CN (1) CN1216556C (en)
AR (1) AR032828A1 (en)
AT (1) ATE468033T1 (en)
BR (1) BR0207439B1 (en)
CA (1) CA2438908C (en)
CZ (1) CZ301372B6 (en)
DE (1) DE60236421D1 (en)
DK (1) DK1377184T4 (en)
EA (1) EA004840B1 (en)
ES (1) ES2345976T5 (en)
HK (1) HK1058885A1 (en)
HU (1) HU230306B1 (en)
MX (1) MXPA03007568A (en)
PL (1) PL207339B1 (en)
PT (1) PT1377184E (en)
TW (1) TWI249381B (en)
UA (1) UA73645C2 (en)
UY (1) UY27184A1 (en)
WO (1) WO2002069745A1 (en)
ZA (1) ZA200306405B (en)

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