EP0474940B2 - Concentric smoking filter having discrete tow and web filter media - Google Patents
Concentric smoking filter having discrete tow and web filter media Download PDFInfo
- Publication number
- EP0474940B2 EP0474940B2 EP90313555A EP90313555A EP0474940B2 EP 0474940 B2 EP0474940 B2 EP 0474940B2 EP 90313555 A EP90313555 A EP 90313555A EP 90313555 A EP90313555 A EP 90313555A EP 0474940 B2 EP0474940 B2 EP 0474940B2
- Authority
- EP
- European Patent Office
- Prior art keywords
- filter
- smoking
- plug
- central core
- tow
- 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 - Lifetime
Links
- 230000000391 smoking effect Effects 0.000 title claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 40
- 235000019504 cigarettes Nutrition 0.000 claims abstract description 34
- 229920002301 cellulose acetate Polymers 0.000 claims abstract description 23
- 230000002093 peripheral effect Effects 0.000 claims description 25
- 238000009423 ventilation Methods 0.000 claims description 15
- 241000208125 Nicotiana Species 0.000 claims description 14
- 235000002637 Nicotiana tabacum Nutrition 0.000 claims description 14
- 239000000779 smoke Substances 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 4
- 239000000796 flavoring agent Substances 0.000 claims description 4
- 235000019634 flavors Nutrition 0.000 claims description 3
- 239000002657 fibrous material Substances 0.000 claims 1
- 238000012384 transportation and delivery Methods 0.000 description 10
- 239000000835 fiber Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- SNICXCGAKADSCV-JTQLQIEISA-N (-)-Nicotine Chemical compound CN1CCC[C@H]1C1=CC=CN=C1 SNICXCGAKADSCV-JTQLQIEISA-N 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 229960002715 nicotine Drugs 0.000 description 2
- SNICXCGAKADSCV-UHFFFAOYSA-N nicotine Natural products CN1CCCC1C1=CC=CN=C1 SNICXCGAKADSCV-UHFFFAOYSA-N 0.000 description 2
- 239000011122 softwood Substances 0.000 description 2
- 241000120020 Tela Species 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Images
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
- A24D3/06—Use of materials for tobacco smoke filters
- A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
- A24D3/10—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent of cellulose or cellulose derivatives
-
- 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
-
- 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
-
- 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
Definitions
- filtering media other than cellulose acetate.
- One such medium is an appropriate sheet or web material.
- the web material which is gathered into a cylindrical plug, can be paper or any other web material, including cellulose acetate in sheet form. When such web materials are used as filters, they are frequently corrugated before being gathered. Paper webs may also be creped to improve tensile strength.
- segment 52 is constructed like filter 12, but has a length of only 18-20 mm, while segment 53 is a 7-9 mm long plug of 2.6/42000 cellulose acetate for tow having a denier per fiber of 2.6, a total denier of 42,000, and a "Y" cross-sectional shape.
- Total filter RTD is between about 125 mm W.G. and about 175 mm W.G., preferably about 141 mm W.G.
- the RTD of segment 53 is between about 15 mm W.G. and about 45 mm W.G., preferably about 36 mm W.G.
- the RTD of segment 52 is between about 85 mm W.G.
- the cigarette also exhibited a pattern of visible deposition of filtrate on the end of the filter much more like a tow filter as opposed to a web filter, even though most of the filtrate was deposited on the web core. This is believed to be the result of the smoke being forced into core 21 as the ventilation air is introduced at holes 15, and then trying to spread back into peripheral tow layer 20 through permeable wrapper 23.
- the filter of this invention will improve the taste of low delivery cigarettes. It is also possible that the filter of this invention may offer similar performance at higher deliveries. For example, a medium delivery cigarette may be perceived as a full-flavor cigarette.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Cigarettes, Filters, And Manufacturing Of Filters (AREA)
- Filtering Materials (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
- Undergarments, Swaddling Clothes, Handkerchiefs Or Underwear Materials (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
Description
- This invention relates to smoking filters, and particularly to concentric smoking filters; see prior art of US-A-3 396 061. More particularly, this invention relates to concentric smoking filters having tow and web filter media portions arranged concentrically.
- Most smoking filters, particularly cigarette filters, sold commercially as part of cigarettes consist of a cylindrical rod or "plug" of a "tow" of plasticized cellulose acetate fibers. Some filters are variants of the standard filter, having recessed mouth ends, or being made of two plugs placed end-to-end with a space in between, the space being either empty or filled with another material such as charcoal. It is also known to provide such filters having multiple plugs abutting one another, the different plugs differing in density or other characteristics.
- Similarly, it is known to provide filtering media other than cellulose acetate. One such medium is an appropriate sheet or web material. The web material, which is gathered into a cylindrical plug, can be paper or any other web material, including cellulose acetate in sheet form. When such web materials are used as filters, they are frequently corrugated before being gathered. Paper webs may also be creped to improve tensile strength.
- Some of these different materials and different constructions have been combined. For example, it is known to provide filters having two or more abutting plugs, at least one of which is cellulose acetate tow, and at least one of which is a web material.
- Finally, it is known to provide "concentric filters" in which two different forms of cellulose acetate tow -- differing, e.g., in density -- are formed in to a filter. One cellulose acetate tow forms a cylindrical "core", while the other tow forms an annular peripheral layer.
- Smoking filters are characterized by various parameters, including pressure drop, which is referred to as resistance-to-draw ("RTD") and usually measured as the height of a column of water, and efficiency, which is measured as the percentage of the total particulate matter ("TPM") in the unfiltered smokestream that is trapped by the filter. The RTD of a filter affects how smokers perceive the filter in terms of how hard they must draw on it to receive a desired amount of smoke, while the filter efficiency controls the amount of TPM delivered in the smoke.
- It has been found that while web filters, and particularly paper filters, are more efficient than tow filters, the web material, especially paper, adds an off taste to the smoke which decreases smoker satisfaction. In addition, the appearance of the visible deposited smoke components on the end of a paper filter is much less regular, and more spotty, than on a cellulose acetate tow filter, again affecting the aesthetic impact on the smoker. This difference in appearance is believed to result from the channelling of deposited material in the channels formed by the corrugation and gathering of the web during plug making.
- As consumer preferences tend toward lower delivery cigarettes, the need for higher efficiency filters, which allow lower delivery without increased filter RTD, increases. However, the higher efficiency of paper filters could not previously be taken advantage of because of the negative consumer impacts of paper filters.
- It would be desirable to be able to provide a high efficiency filter which produced low delivery while also delivering acceptable taste, RTD and other aesthetic impacts.
- It is an object of this invention to provide a high efficiency filter which produces low delivery while also delivering acceptable taste, RTD and other aesthetic impacts.
- In accordance with this invention, there is provided a smoking filter comprising a filter plug having a central core of a first filter material and a peripheral layer) of a second filter material surrounding the said central core and a tipping around the peripheral layer, one of the said first and second materials being a fibrous tow and the other of said first and second materials being a gathered corrugated web material, the tipping having holes therethrough for the admission of air into the peripheral layer, the said filter plug having a resistance-to-draw of between about 130mm W.G. and about 195mm W.G., the said central core having a resistance-to-draw of between about 285mm W.G. and about 450mm W.G. and the central core being wrapped in a porous plug wrap to permit passage of smoke between the peripheral layer and the central core.
- The above and other objects and advantages of the invention will be apparent upon consideration of the following detailed description, taken in conjunction with the accompanying drawings, in which like reference characters refer to like parts throughout, and in which:
- FIG. 1 is a mouth end perspective view of a cigarette having a first embodiment of a filter according to the present invention;
- FIG. 2 is a radial cross-sectional view of the filter of FIG. 1;
- FIG. 3 is a mouth end perspective view of a cigarette having a second embodiment of a filter according to the present invention;
- FIG. 4 is a radial cross-sectional view of the filter of FIG. 3;
- FIG. 5 is a mouth end perspective view of a cigarette having a third embodiment of a filter according to the present invention; and
- FIG. 6 is a mouth end perspective view of a cigarette having a fourth embodiment of a filter according to the present invention.
-
- In accordance with the present invention, it has unexpectedly been found that when a concentric filter is made with paper or other web material in the core, and cellulose acetate tow in the periphery, or vice-versa, not only is high filtration efficiency achieved without the introduction of an off taste from the paper, but a cigarette with low TPM delivery can be produced which has the taste of a cigarette with a higher TPM delivery.
- As shown in FIGS. 1 and 2,
cigarette 10 includes atobacco rod 11 and a first preferred embodiment of afilter 12 according to this invention. Tobaccorod 11 is wrapped inconventional wrapper 13, whilefilter 12 is wrapped byconventional tipping 14.Filter 12 includes cellulose acetate towperipheral layer 20 andcentral paper core 21. Cellulose acetateperipheral layer 20 is a conventional cellulose acetate tow, preferably wrapped byporous plug wrap 22, although self-supporting filter rod technology, such as steam bonding or spray coating of the outer surface ofperipheral layer 20, can be used to make a filter that need not be wrapped, if desired.Paper core 21 is a paper web that has been corrugated and gathered into cylindrical form and wrapped withplug wrap paper 23. -
Plug wrap 23 improves the processibility ofcore 21 as well as its aesthetic appearance, and also helps to assure substantially perfect concentricity. Flavorants or other additives, such as soluble tobacco components, could be applied toplug wrap 23 to enhance the subjective impact of the filtered smoke. A similar result might be achieved by formingplug wrap 23 from a tobacco-containing material, such as reconstituted tobacco sheet.Plug wrap 23 is porous, to allow smoke and air to freely move radially betweenperipheral layer 20 andcore 21. At the same time, the presence ofplug wrap 23 helps prevent channelling of smoke along the interface betweenperipheral layer 20 andcore 21. - The most preferred embodiment of
filter 12 has a circumference of about 24.45 mm and an average weight of about 258 mg. The cross-sectional area ofcore 21 preferably makes up about 60% of the total cross-sectional area offilter 12.Filter 12 preferably has an RTD of between about 130 mm W.G. and about 160 mm W.G., with the RTD ofcentral core 21 being between about 350 mm W.G. and about 450 mm W.G.. More preferably,filter 12 has an RTD of about 146 mm W.G., with the RTD ofcentral core 21 being about 400 mm W.G. - In the particularly preferred embodiment, the cellulose acetate tow of
peripheral layer 20 is preferably an 8.0/30000 cellulose acetate tow having a denier per fiber of 8, a total denier of 30,000, and a "Y" cross-sectional shape. The web ofcore 21 is preferably a 100% cellulose semi-creped softwood pulp paper with 10% crosswise creping for added tensile strength. Such a paper is available from Tela Papierfabrik AG, of Balsthal, Switzerland. -
Cigarette 10 is preferably ventilated to between about 65% and about 75% ventilation, and more preferably about 67% ventilation, withappropriate ventilation holes 15 provided in tipping 14. If the surface offilter 12 is not air permeable, appropriate holes would also be provided infilter 12. - FIGS. 3 and 4 show a
cigarette 30 having a second preferred embodiment offilter 31 similar in construction tofilter 12, except thatcore 40 is a tow material andperipheral layer 41 is a web material. Similarly, in this embodiment plug wrap 42 is necessary to contain the web material ofperipheral layer 41, while plug wrap or otherpermeable wrap 43 aroundtow core 40 is optional, astow core 40 could be made using self-supporting filter rod technology, as above. - The most preferred embodiment of
filter 31 has a circumference of about 24.45 mm and an average weight of about 240 mg. The cross-sectional area ofcore 40 preferably makes up about 60% of the total cross-sectional area offilter 31.Filter 31 preferably has an RTD of between about 165 mm W.G. and about 195 mm W.G., with the RTD ofcentral core 40 being between about 285 mm W.G. and about 385 mm W.G. More preferably,filter 31 has an RTD of about 182 mm W.G., with the RTD ofcentral core 40 being about 334 mm W.G. - In this embodiment, the cellulose acetate tow of
core 40 is preferably a 1.6/35000 cellulose acetate tow having a denier per fiber of 1.6, a total denier of 35,000, and a "Y" cross-sectional shape. The web ofperipheral layer 41 is preferably the same 100% cellulose semi-creped softwood pulp paper, with 10% crosswise creping for added tensile strength, that is used incore 21 offilter 12. -
Cigarette 30 is preferably ventilated to between about 65% and about 75% ventilation, and more preferably about 67% ventilation, with appropriate ventilation holes 15 provided in tipping 14, as incigarette 10. - FIG. 5 shows a
cigarette 50 having a third preferred embodiment of a filter 51 according to the invention. Filter 51 is a so-called "dual" filter, made up of twoabutting filter segments Filter segment 52, which isadjacent tobacco rod 11, is a concentric filter as discussed above, in which one ofcore 54 andperipheral layer 55 is of a web material and the other ofcore 54 andperipheral layer 55 is of a tow material.Filter segment 53, which is at the mouth end, is a conventional tow filter, such as a cellulose acetate filter, and is provided primarily for cosmetic purposes. Nevertheless,segment 53 has filtration and RTD characteristics, andsegment 52 must be adjusted so that the overall filter 51 has the desired characteristics. - In a preferred form of this embodiment,
segment 52 is constructed likefilter 12, but has a length of only 18-20 mm, whilesegment 53 is a 7-9 mm long plug of 2.6/42000 cellulose acetate for tow having a denier per fiber of 2.6, a total denier of 42,000, and a "Y" cross-sectional shape. Total filter RTD is between about 125 mm W.G. and about 175 mm W.G., preferably about 141 mm W.G. The RTD ofsegment 53 is between about 15 mm W.G. and about 45 mm W.G., preferably about 36 mm W.G. The RTD ofsegment 52 is between about 85 mm W.G. and about 175 mm W.G., preferably about 93 mm W.G. The RTD of thepaper core 54 ofsegment 52 is between about 250 mm W.G. and about 450 mm W.G., preferably about 267 mm. W.G.Cigarette 50 made with this embodiment of filter 51 is ventilated to between about 65% and about 75% ventilation, preferably about 71% ventilation, with appropriate ventilation holes 15 in tipping 14. - FIG. 6 shows a
cigarette 60 having a fourth embodiment of afilter 61 according to the invention.Filter 61 is a recessed filter, made up offilter segment 62 recessed into tipping 14 at 63.Filter segment 62, which isadjacent tobacco rod 11, is a concentric filter as discussed above, in which one ofcore 64 andperipheral layer 65 is of a web material and the other ofcore 64 andperipheral layer 65 is of a tow material. - The filter parameters discussed herein are given for 85 mm cigarettes. It is to be understood that filters according to the present invention can also be used with longer cigarettes. If a longer cigarette is provided, the filter parameters would have to be adjusted, in accordance with the knowledge of those skilled in the art.
- A filter according to the most preferred embodiment discussed above in connection with FIGS. 1 and 2, except that the tow in the peripheral layer was an 8.0/25000 cellulose acetate tow having a denier per fiber of 8.0 and a total denier of 25000, was prepared and mated to an "ultra-light" tobacco rod having the following characteristics:
Tobacco 487 mg Total RTD 107 mm W.G. Filter RTD 146 mm W.G. Ventilation 67% Tipping length 32.0 mm - The cigarette was smoked in a smoking machine under FTC conditions with the following results:
TPM 1.8 mg Nicotine 0.16 mg Water 0.21 mg "Tar" 1.5 mg Puff Count 6.2 - The cigarette, which generates 1.5 mg of "tar", was also smoked by expert smokers, who reported that the cigarette had the taste of a cigarette that generates 4-5 mg of "tar". At 67% ventilation, the filter has an efficiency of about 76%. If there had been no ventilation, the efficiency would have been about 61%.
- The cigarette also exhibited a pattern of visible deposition of filtrate on the end of the filter much more like a tow filter as opposed to a web filter, even though most of the filtrate was deposited on the web core. This is believed to be the result of the smoke being forced into
core 21 as the ventilation air is introduced atholes 15, and then trying to spread back intoperipheral tow layer 20 throughpermeable wrapper 23. - A filter according to the preferred form of the embodiment of FIG. 5 was prepared and mated to an "ultra-light" tobacco rod having the following characteristics:
Tobacco 429 mg Total RTD 93 mm W.G. Filter RTD 141 mm W.G. Ventilation 71% Tipping length 32 mm - The cigarette was smoked in a smoking machine under FTC conditions with the following results:
TPM 1.6 mg Nicotine 0.13 mg Water 0.10 mg "Tar" 1.4 mg Puff Count 5.3 - As in the case of Example I, this cigarette was smoked by expert smokers who reported that the cigarette had the taste of a cigarette that generates 4-5 mg of "tar".
- The filter of this invention will improve the taste of low delivery cigarettes. It is also possible that the filter of this invention may offer similar performance at higher deliveries. For example, a medium delivery cigarette may be perceived as a full-flavor cigarette.
- Thus it is seen that a high efficiency filter which produces low delivery while also delivering acceptable taste and other aesthetic impacts is provided.
Claims (21)
- A smoking filter comprising a filter plug (12, 31, 52, 62) having a central core (21, 40, 54, 64) of a first filter material and a peripheral layer (20, 41, 55, 65) of a second filter material surrounding the said central core and a tipping (14) around the peripheral layer, one of the said first and second materials being a fibrous tow and the other of said first and second materials being a gathered corrugated web material, the tipping having holes (15) therethrough for the admission of air into the peripheral layer, the said filter plug having a resistance-to-draw of between about 130mm W.G. and about 195mm W.G., the said central core having a resistance-to-draw of between about 285mm W.G. and about 450mm W.G. and the central core being wrapped in a porous plug wrap (23, 43) to permit passage of smoke between the peripheral layer and the central core.
- The smoking filter of claim 1 wherein said first filter material (21) is said web material and said second filter material (20) is said fibrous tow.
- The smoking filter of claim 2 wherein said second material is cellulose acetate tow having a denier per filament of about 8.0 and a total denier of from 25,000 to 30,000, preferably about 30,000.
- The smoking filter of claim 1 wherein said first filter material (40) is said fibrous tow and said second filter material (41) is said web material.
- The smoking filter of claim 4 wherein said first fibrous material is cellulose acetate tow having a denier per filament of about 1.6 and a total denier of about 35,000.
- The smoking filter of any of claims 1 to 5 wherein said web material is paper.
- The smoking filter of claim 6 wherein said paper is creped before being corrugated and gathered.
- The smoking filter of any of claims 1 to 5 wherein said web material is a non-woven web.
- The smoking filter of claim 8 wherein said non-woven web is cellulose acetate sheet.
- The smoking filter of any of claims 1 to 9 wherein said gathered corrugated web material is wrapped in a plug wrap (23, 42).
- The smoking filter of claim 10 wherein said plug wrap (23) contains flavor components.
- The smoking filter of claim 11 wherein said plug wrap (23) comprises a tobacco-containing material such as reconstituted tobacco sheet.
- The smoking filter of claim 11 wherein said plug wrap (23) comprises plug wrap paper to which flavor components have been added, preferably soluble tobacco components.
- The smoking filter of claim 1, 2, or 3 having a filtration efficiency of about 61% unventilated.
- The smoking filter of any preceding claim having a ventilation rate of between 65% and 75%.
- The smoking filter of any preceding claim `wherein said core (21,40) has a cross-sectional area occupying about 60% of the total cross-sectional area of said filter.
- The smoking filter of claim 1, 2 or 3 wherein said filter has a resistance-to-draw of about 146 mm W.G., said central core (21) having a resistance-to-draw of about 400 mm W.G.
- The smoking filter of claim 1, 4 or 5 wherein said filter has a resistance-to-draw of between about 165 mm W.G. and about 195 mm W.G., said central core (40) having a resistance-to-draw of between about 285 mm W.G. and about 385 mm W.G.
- The smoking filter of any of claims 1 to 16 further comprising a second filter plug (53) of cellulose acetate tow adjacent to the first-mentioned filter plug (52).
- The smoking filter of any of claims 1 to 18 further comprising tipping (14) wrapped therearound, said tipping extending beyond one end of said filter plug (62) for attaching said filter to a cigarette and extending beyond the opposite end of said filter plug, forming a mouth-end recess in said filter.
- The smoking filter of any of claims 1 to 17 wherein the peripheral layer (20) has a lower resistance-to-draw than the central core (21).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US57187890A | 1990-08-24 | 1990-08-24 | |
US571878 | 1990-08-24 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0474940A1 EP0474940A1 (en) | 1992-03-18 |
EP0474940B1 EP0474940B1 (en) | 1994-12-14 |
EP0474940B2 true EP0474940B2 (en) | 1999-10-06 |
Family
ID=24285429
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90313555A Expired - Lifetime EP0474940B2 (en) | 1990-08-24 | 1990-12-13 | Concentric smoking filter having discrete tow and web filter media |
Country Status (17)
Country | Link |
---|---|
EP (1) | EP0474940B2 (en) |
JP (1) | JP2767322B2 (en) |
KR (1) | KR0175139B1 (en) |
AT (1) | ATE115369T1 (en) |
AU (1) | AU635095B2 (en) |
CA (1) | CA2031727C (en) |
DE (1) | DE69015185T3 (en) |
DK (1) | DK0474940T4 (en) |
ES (1) | ES2066157T5 (en) |
FI (1) | FI94385C (en) |
GR (2) | GR3015326T3 (en) |
HK (1) | HK162995A (en) |
HU (1) | HU212772B (en) |
NO (1) | NO176464C (en) |
PL (1) | PL166314B1 (en) |
RU (1) | RU1836040C (en) |
TR (1) | TR25717A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101999755A (en) * | 2010-12-17 | 2011-04-06 | 南通烟滤嘴有限责任公司 | Filter rod with coaxial paper cores |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5746230A (en) * | 1990-08-24 | 1998-05-05 | Philip Morris Incorporated | Concentric smoking filter having discrete tow and web filter media |
US5622190A (en) * | 1990-08-24 | 1997-04-22 | Philip Morris Incorporated | Concentric smoking filter having cellulose acetate tow periphery and carbon-particle-loaded web filter core |
US5365951A (en) * | 1990-08-24 | 1994-11-22 | Philip Morris Incorporated | Concentric smoking filter having cellulose acetate tow periphery and carbon-particle-loaded web filter core |
EP0638248A1 (en) * | 1993-08-12 | 1995-02-15 | Philip Morris Products Inc. | Methods and apparatus to make concentric filters composed of two or more materials |
GB9321536D0 (en) * | 1993-10-19 | 1993-12-08 | British American Tobacco Co | Smoking articles |
DE19718296B4 (en) * | 1997-04-30 | 2006-06-29 | British American Tobacco (Germany) Gmbh | Ventilated filter cigarette with a coaxial filter element |
DE19722812C2 (en) | 1997-05-30 | 2003-02-13 | Bat Cigarettenfab Gmbh | Ultralight coaxial cigarette with multi-part filter |
EE200000264A (en) * | 1997-11-13 | 2001-06-15 | H.F. & Ph.F. Reemtsma Gmbh | Reduced gas phase cigarette |
DE10009829A1 (en) * | 2000-03-01 | 2001-09-20 | Reemtsma H F & Ph | Filter cigarette has two part filter with ventilator, core, casing and length of tobacco. |
GB0713905D0 (en) | 2007-07-17 | 2007-08-29 | British American Tobacco Co | Cellulose acetate thread in filter |
GB0811552D0 (en) * | 2008-06-24 | 2008-07-30 | British American Tobacco Co | Filter for a smoking article |
GB0816933D0 (en) * | 2008-09-16 | 2008-10-22 | British American Tobacco Co | Filter for a smoking article |
TR201902078T4 (en) | 2013-03-28 | 2019-03-21 | Philip Morris Products Sa | Smoking product containing a flavor delivery element. |
CN104188106A (en) * | 2014-08-28 | 2014-12-10 | 云南中烟工业有限责任公司 | Cigarette filter tip with high interception efficiency and application |
JP6833996B2 (en) * | 2017-06-19 | 2021-02-24 | 日本たばこ産業株式会社 | Filters for smoking goods and their manufacturing methods |
KR102391290B1 (en) * | 2020-04-22 | 2022-04-26 | 주식회사 케이티앤지 | Mouthpiece for smoking aritcle, smoking article and smoking article assembly and smoking article package including the same |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3396061A (en) * | 1964-06-01 | 1968-08-06 | Celanese Corp | Smoke filters |
US4034765A (en) * | 1975-10-30 | 1977-07-12 | Liggett & Myers Incorporated | Tobacco smoke filter |
US4082098A (en) * | 1976-10-28 | 1978-04-04 | Olin Corporation | Flavored cigarette |
AU4119078A (en) | 1977-11-18 | 1980-05-08 | Philip Morris Inc | Filter system |
US4355995A (en) * | 1979-03-27 | 1982-10-26 | American Filtrona Corporation | Tobacco smoke filter providing tobacco flavor enrichment, and method for producing same |
US4291711A (en) * | 1979-03-27 | 1981-09-29 | American Filtrona Corporation | Tobacco smoke filter providing tobacco flavor enrichment, and method for producing same |
AU556902B2 (en) * | 1981-12-18 | 1986-11-27 | Cigarette Components Limited | Tobacco smoke filter |
DE3207683C2 (en) * | 1982-03-03 | 1986-06-05 | B.A.T. Cigaretten-Fabriken Gmbh, 2000 Hamburg | Filter for a smokable article |
GB2119221B (en) * | 1982-04-05 | 1986-05-29 | Filtrona Ltd | Cigarette filter |
DE3743597C1 (en) * | 1987-12-22 | 1989-02-16 | Bat Cigarettenfab Gmbh | Coaxial cigarette |
DE3901226C1 (en) * | 1989-01-17 | 1990-07-26 | B.A.T. Cigarettenfabriken Gmbh, 2000 Hamburg, De |
-
1990
- 1990-12-05 AU AU67748/90A patent/AU635095B2/en not_active Ceased
- 1990-12-07 CA CA002031727A patent/CA2031727C/en not_active Expired - Fee Related
- 1990-12-11 FI FI906092A patent/FI94385C/en not_active IP Right Cessation
- 1990-12-13 EP EP90313555A patent/EP0474940B2/en not_active Expired - Lifetime
- 1990-12-13 ES ES90313555T patent/ES2066157T5/en not_active Expired - Lifetime
- 1990-12-13 DK DK90313555T patent/DK0474940T4/en active
- 1990-12-13 DE DE69015185T patent/DE69015185T3/en not_active Expired - Fee Related
- 1990-12-13 AT AT90313555T patent/ATE115369T1/en not_active IP Right Cessation
- 1990-12-18 PL PL90288311A patent/PL166314B1/en unknown
- 1990-12-20 HU HU908366A patent/HU212772B/en not_active IP Right Cessation
- 1990-12-26 JP JP2414611A patent/JP2767322B2/en not_active Expired - Fee Related
- 1990-12-26 KR KR1019900021735A patent/KR0175139B1/en not_active IP Right Cessation
- 1990-12-26 RU SU904894124A patent/RU1836040C/en active
- 1990-12-26 TR TR90/1210A patent/TR25717A/en unknown
- 1990-12-28 NO NO905639A patent/NO176464C/en unknown
-
1995
- 1995-03-07 GR GR950400504T patent/GR3015326T3/en unknown
- 1995-10-19 HK HK162995A patent/HK162995A/en not_active IP Right Cessation
-
1999
- 1999-12-15 GR GR990403230T patent/GR3032144T3/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101999755A (en) * | 2010-12-17 | 2011-04-06 | 南通烟滤嘴有限责任公司 | Filter rod with coaxial paper cores |
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