US3311519A - Additive filter - Google Patents
Additive filter Download PDFInfo
- Publication number
- US3311519A US3311519A US340601A US34060164A US3311519A US 3311519 A US3311519 A US 3311519A US 340601 A US340601 A US 340601A US 34060164 A US34060164 A US 34060164A US 3311519 A US3311519 A US 3311519A
- Authority
- US
- United States
- Prior art keywords
- tow
- carbon
- filter
- activated carbon
- treated
- 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
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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
- A24D3/02—Manufacture of tobacco smoke filters
- A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming
- A24D3/0212—Applying additives to filter materials
- A24D3/022—Applying additives to filter materials with liquid additives, e.g. application of plasticisers
-
- 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
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/12—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with filaments or yarns secured together by chemical or thermo-activatable bonding agents, e.g. adhesives, applied or incorporated in liquid or solid form
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
Definitions
- This invention relates to tobacco smoke filters. More particularly, this invention concerns method and apparatus for producing a tobacco smoke filter containing finely divided carbon.
- U.S. Patent 2,881,770 to Touey are disclosed fibrous tobacco smoke filters carrying finely divided carbon particles on the surface of the filaments thereof.
- U.S. Patent 3,043,736 Touey discloses applying carbon powder to opened and banded moving tow as a latex emulsion or slurry in aqueous media, in a volatile organic vehicle or in a plasticizer. More recently, to alleviate the possibility of some of the carbon reaching the smokers mouth and for other purposes, dual filters have been developed in which two or more filters are use-d, the one next to the smokers mouth containing no carbon.
- our invention involves applying to alternating portions of moving handed and opened filter tow a liquid dispersion of finely divided additive such as activated carbon and forming the thus treated tow into unitary rod-shaped filter elements each of which contains both a portion with additive and a portion without additive.
- the resulting filter elements are each in one piece with no segment or division between the treated and non-treated portions except a visible reasonably clear-cut dividing line, such as the difference between black and white portion in the case of cellulose acetate filter rods containing activated carbon.
- Any textile tow which is suitable for making cigarette filter tips may be used in carrying out this invention.
- Tows made from cellulose esters, regenerated cellulose, cotton, polyolefins such as polyethylene and polypropylene, and other synthetic fibers may be used.
- Crimped tow such as those described in U.S. Patents 3,017,309, 2,794,239, 2,966,157 and 3,038,478 to Touey or coworkers are particularly useful.
- Media which we have found useful in applying the additive to a filter tow according to our invention consists of at least one liquid vehicle for dispersing the additive, and
- a bonding agent may be used with or in place of water as the liquid vehicle which serves as 3,311,519 Patented Mar. 28, 1967 the bonding agent for binding the additive to the tow fibers.
- the carbon may be derived from wood, petroleum, nut shell such as cocoanut or pecan shell, coal, blood, bone, or other convenient sources. It should have a particle size which would allow it to pass through a 40 mesh screen.
- Water is a convenient liquid vehicle since it is readily available and need not be recovered.
- the suspending agent and bonding agent may be the same material.
- Cellulose derivatives such as carboxymethyl cellulose, methyl cellulose, hydroxyethyl cellulose, sodium cellulose sulfate and cellulose monoand diacetates; vinyl polymers such as poly(vinyl chloride), poly(vinyl alcohol), poly- (vinyl acetate), poly(vinylpyrrolidone), and sodium stymer; natural gums such as gum arabic; casein; alginates; gelatin, dextrin, and the modified and unmodified starches may be used.
- the carbon additive is applied to alternate areas of the spreadout tow by pulling the tow through a pair of rotating cogwheels so mated that the outer circumference of cogs of the lower roll apply additive such as dispersed carbon at regular intervals along the length of the moving tow from a liquid bath in which the lower roll is at least partially immersed as it rotates, the upper roll rotating in the opposite direction.
- the carbon dispersion may be applied by stamping alternate sections of tow with a sponge containing said dispersion.
- the treated tow is cured or dried and then cut at regular intervals alternating between the center of carbon treated and untreated sections such that each rod has an untreated section to be used as the part placed next to the smokers mouth.
- the treated segment of the unitary rod need not contact the smokers mouth.
- FIG. 1 is a semi-schematic representation of the tow treating method and apparatus of our invention.
- FIG. 2 is an enlarged view of the tow treating portion of our invention showing the rolls and tow treating means as they appear in perspective from the end.
- FIG. 3 is a top view of the tow-treating means of our invention.
- LFIG. 4 depicts a section of filter t-ow treated in alternate portions and fabricated into rod-shaped form as it appears prior to cutting into individual filter elements.
- FIG. 5 is an enlarged view showing the alternating treated and untreated portions of the filaments of a section of tow.
- the tow 10 is spread out in spreading device 12 to form. a band 14 about 6 inches in width, then pulled through a pair of cog wheels 16 and 18 mated so that the outer circumference of the cogs contact the tow at regular intervals.
- a reservoir 20 of the carbon slurry is positioned so that the cogs 22 from the lower wheel 18 will dip into the slurry 24, and as the cogwheels 16 and 18 revolve, the outer circumference of both cogwheels becomes saturated with the carbon slurry.
- the outer circumference of the upper wheel obtains a uniform saturation of carbon slurry by seepage between filaments of the tow.
- carbon slurry may also be applied to the upper wheel cogs from a wick or minutely perforated bottom of a slurry tank placed above the upper wheel.
- the tow 14 As the tow 14 passes between the wheels 16 and 18, it adsorbs the slurry from the surface of the cogs and a tow 26 containing alternate bands of untreated and treated areas is obtained.
- the tow is then passed through a dryer 28 and into a filter fabricating machine 30.
- the final filter tips will have a length of carbon treated filter which is approximately one half the cog treating distance a in FIG. 1.
- Each tip will also have a length of untreated filter approximately one half the non-cog treating distance b in FIG. 1.
- EXAMPLE I 'Iwo applicators were prepared as follows. A cellulose sponge was cut into strips 20 mm. x 20 mm. x 150 mm. Ten of the strips were suitably adhered onto a glass plate which was 150 mm. wide and 400 mm. long. The pieces of sponge were positioned on the glass so that they were 20 mm. apart and parallel to each other.
- the sponges on the 2 applicators (a total of 20 sponges) were saturated with a slurry consisting of 14% by weight activated carbon (obtained from the American Norit Corn pany under the trade name of Norit SS), 2% methyl cellulose, and 84% water.
- a tow of cellulose acetate yarn containing approximately 12,000 crimped fibers of 5 denier per filament was spread out to a width of about 140 mm.
- the spread tow was laid on one of the applicators so that the longitudinal direction of the tow was at right angles to the long dimension of the sponges.
- the second applicator was then laid on top of the tow in such a way that the sponges on the top applicators were directly above the sponges on the bottom applicator.
- the applicators were removed and the tow was dried.
- the tow prepared in this manner had alternate bands of carbon coated fibers and uncoated fibers.
- the coated and uncoated bands were each about 20 mm. wide.
- the treated tow was bundled together and pulled through a cigarette filter make-up machine which wrapped the tow with paper.
- the filter rod which contained 20 mm. sections of carbon coated tow separated by 20 mm. sections of untreated tow was cut into 20 mm. filter tips. The cuts were made in the center of the carbon section, and the center of the untreated section. Approximately one half of each filter tip contained carbon.
- the filter tips were attached to a standard king size cigarette by means of a cellophane tape.
- the end of the filter which contained the carbon was placed next to the tobacco of the cigarette.
- the cigarettes were then smoked with an automatic smoking device.
- the vapor phase of the smoke which exited from the filter was collected and analyzed by gas chromatography. The amounts of several components of this gas phase are listed in the following table. The amounts of the same components found in unfiltered smoke are also listed for camparison.
- the continuous filter rod which was ejected from the machine contained alternate sections of carbon treated fibers and untreated fibers.
- the rod was cut approximately in the center of each carbon section and approximately in the center of each untreated section.
- the resulting filter tips were 20 mm. long and contained a carbon section approximately 10 mm. long and an untreated section approximately 10 mm. long.
- EXAMPLE IV This example demonstrates how the cogged wheel applicator would work on a larger scale in depositing additive on alternating segments of filter tow according to our invention.
- the peripheral circumferential surfaces of the cogs of upper and lower wheels consist of cellulose sponge onequarter /4) inch in thickness. However, other absorbent material such as sponge rubber or the like resilient substance may be used with equal efiiciency.
- the wheels turn such that the cogs meet at nip as indicated generally in FIG. 1.
- the major circumference of the cogwheel was 37.6 inches and the minor circumference was 31.4 inches.
- the individual peripheral surfaces of the cogs were 0.4 inch along the arc of the circle formed thereby and the width of the flats at the root of the cogs was 0.27 inch.
- the total length of the cogwheel was 14 inches.
- the shaft of the lower wheel is fitted via hearings to turning mean-s (not shown) and driven by an electric motor (not shown).
- the upper wheel is synchronize-d in harmony with the lower wheel, both having driven by a common drive (not shown).
- a common drive not shown.
- a dispersion of 16% activated carbon, 3% methyl cellulose and 81% water adheres to the absorbent cog surfaces as the lower wheel turns such that it cogs dip about one-half /2) inch into the dispersion held in a tank about 12 inches by 18 inches by 6 inches in size and made of stainless steel.
- the under side of the tow picks up the liquid dispersion of carbon at alternating intervals the distance apart of the rotating peripheral surfaces of the cogs containing the carbon dispersion absorbed thereon. After the first few turns of the wheels sufficient carbon dispersion is absorbed on the lower-wheel cogs for enough to remain after some is deposited at the regular intervals on the under side of the moving tow to penetrate between the tow filaments and be absorbed on the spongy outer surfaces of the upper wheel cogs and then pass therefrom and be deposited at the same regular intervals on the top side of the tow.
- the tow passes continuously from the treating step to a garniture for fabricating into rod-like form, the compacted and wrapped tow then being cut regularly at the respective midpoints of treated and untreated portions.
- the resulting filter elements are then attached to standard brand cigarettes reduced in size to allow for attachment of filter sections such that the carbon containing portions are away from the smoking end and smoked on a cigarette-smoking machine.
- the cigarettes thus smoked prove highly eifective in tar and nicotine removal.
- the method of treating continuous filament tow which comprises applying activated carbon to alternate sections of a single band of continuous filament tow of at least about 6000 filaments arranged in a generally parallel relationship to the longitudinal axis of the tow and of a denier per filament of about 3 to 8 from an aqueous dispersion of the activated carbon by striking said alternate sections of the tow with corresponding alternate prot-rusions of the lower roll of a pair of rotating rolls as the tow passes through the nip formed therebetween, forming the tow with activated carbon thus applied thereto into substantially cylindrical wrapped filter rods, and cutting said rods so as to form filter elements containing the activated carbon deposited on alternate sections thereof.
- a method of claim 1 wherein the dispersion of ad di-tive comprises 12-30% by weight activated carbon, 15 by weight methyl cellulose and the remainder water.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Cigarettes, Filters, And Manufacturing Of Filters (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US340601A US3311519A (en) | 1964-01-28 | 1964-01-28 | Additive filter |
BE658789D BE658789A (US06811534-20041102-M00003.png) | 1964-01-28 | 1965-01-25 | |
FR3254A FR1422637A (fr) | 1964-01-28 | 1965-01-26 | Nouveaux filtres pour fumée de tabac, procédé et appareillage pour leur fabrication |
CH1473266A CH454715A (fr) | 1964-01-28 | 1965-01-27 | Filasse filtrante |
CH110865A CH442113A (fr) | 1964-01-28 | 1965-01-27 | Procédé pour former des filtres pour la fumée de tabac, appareil pour sa mise en oeuvre et filtre obtenu par ce procédé |
ES0308600A ES308600A1 (es) | 1964-01-28 | 1965-01-27 | Aparato adaptado para aplicar aditivo de una dispersion liquida del mismo a una estopa en movimiento continuo. |
GB3806/65A GB1100541A (en) | 1964-01-28 | 1965-01-28 | Method and apparatus for treating tow |
NL6501047A NL6501047A (US06811534-20041102-M00003.png) | 1964-01-28 | 1965-01-28 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US340601A US3311519A (en) | 1964-01-28 | 1964-01-28 | Additive filter |
Publications (1)
Publication Number | Publication Date |
---|---|
US3311519A true US3311519A (en) | 1967-03-28 |
Family
ID=23334112
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US340601A Expired - Lifetime US3311519A (en) | 1964-01-28 | 1964-01-28 | Additive filter |
Country Status (6)
Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3388953A (en) * | 1966-10-06 | 1968-06-18 | Thomas Bede Foundation | Wet and dry towel dispenser |
US3438806A (en) * | 1965-05-20 | 1969-04-15 | American Cyanamid Co | Process for the manufacture of cigarette containing cyanamide-cellulose acetate filter elements |
US3607567A (en) * | 1968-01-02 | 1971-09-21 | Fmc Corp | Apparatus for nonwoven fabric manufacture |
US3661160A (en) * | 1970-01-28 | 1972-05-09 | Johnson & Johnson | Tobacco smoke filter |
US4000964A (en) * | 1973-12-15 | 1977-01-04 | Bsg Designs Inc. | Polychromatographic dyeing |
US20050066982A1 (en) * | 2003-09-30 | 2005-03-31 | Clark Melissa Ann | Filtered cigarette incorporating an adsorbent material |
WO2007028476A2 (de) * | 2005-09-05 | 2007-03-15 | Rhodia Acetow Gmbh | Filter oder filterelement für tabakrauch. zigarette mit einem derartigen filter oder filterelement und verfahren zur herstellung eines derartigen filters oder filterelementes |
WO2007033272A1 (en) | 2005-09-14 | 2007-03-22 | R. J. Reynolds Tobacco Company | Filtered smoking article |
US20080245377A1 (en) * | 2007-04-04 | 2008-10-09 | R.J. Reynolds Tobacco Company | Cigarette comprising dark-cured tobacco |
US20090090372A1 (en) * | 2005-09-23 | 2009-04-09 | R.J. Reynolds Tobacco Company | Equipment for Insertion of Objects into Smoking Articles |
US20090288672A1 (en) * | 2008-05-21 | 2009-11-26 | R. J. Reynolds Tobacco Company | Cigarette Filter Comprising a Carbonaceous Fiber |
US20090288669A1 (en) * | 2008-05-21 | 2009-11-26 | R.J. Reynolds Tobacco Company | Cigarette filter comprising a degradable fiber |
US20100125039A1 (en) * | 2008-11-20 | 2010-05-20 | R. J. Reynolds Tobacco Company | Carbonaceous Material Having Modified Pore Structure |
US20100122708A1 (en) * | 2008-11-20 | 2010-05-20 | R. J. Reynolds Tobacco Company | Adsorbent Material Impregnated with Metal Oxide Component |
US20110108044A1 (en) * | 2009-11-11 | 2011-05-12 | R.J. Reynolds Tobacco Company | Filter element comprising smoke-altering material |
US20110180084A1 (en) * | 2010-01-27 | 2011-07-28 | R.J. Reynolds Tobacco Company | Apparatus and associated method for forming a filter component of a smoking article |
WO2011140430A1 (en) | 2010-05-07 | 2011-11-10 | R. J. Reynolds Tobacco Company | Filtered cigarette with modifiable sensory characteristics |
US8079369B2 (en) | 2008-05-21 | 2011-12-20 | R.J. Reynolds Tobacco Company | Method of forming a cigarette filter rod member |
WO2012016051A2 (en) | 2010-07-30 | 2012-02-02 | R. J. Reynolds Tobacco Company | Filter element comprising multifunctional fibrous smoke-altering material |
EP2537427A1 (en) | 2008-05-21 | 2012-12-26 | R.J. Reynolds Tobacco Company | Cigarette filter having composite fiber structures |
WO2013043806A2 (en) | 2011-09-23 | 2013-03-28 | R. J. Reynolds Tobacco Company | Mixed fiber product for use in the manufacture of cigarette filter elements and related methods, systems, and apparatuses |
US8739802B2 (en) | 2006-10-02 | 2014-06-03 | R.J. Reynolds Tobacco Company | Filtered cigarette |
US10076135B2 (en) | 2014-05-23 | 2018-09-18 | Greenbutts Llc | Biodegradable cigarette filter tow and method of manufacture |
US10609955B2 (en) | 2011-04-08 | 2020-04-07 | R.J. Reynolds Tobacco Company | Filtered cigarette comprising a tubular element in filter |
US11957163B2 (en) | 2011-04-08 | 2024-04-16 | R.J. Reynolds Tobacco Company | Multi-segment filter element including smoke-altering flavorant |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8823388D0 (en) * | 1988-10-05 | 1988-11-09 | Cigarette Components Ltd | Tobacco smoke filter containing particulate additive |
GB8921659D0 (en) * | 1989-09-26 | 1989-11-08 | Cigarette Components Ltd | Particulate sorbent smoke filter |
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US941530A (en) * | 1909-04-02 | 1909-11-30 | John Mckibbin | Machine for applying paste to cardboard, &c. |
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US2166740A (en) * | 1927-11-16 | 1939-07-18 | North American Rayon Corp | Manufacture of artificial silk |
US2612679A (en) * | 1950-10-23 | 1952-10-07 | Ladisch Rolf Karl | Filaments containing fillers |
US2881770A (en) * | 1954-05-27 | 1959-04-14 | Eastman Kodak Co | Fibrous tobacco smoke filters |
US2915069A (en) * | 1954-07-13 | 1959-12-01 | Olin Mathieson | Smoking device |
US2940456A (en) * | 1956-02-08 | 1960-06-14 | Eastman Kodak Co | Fibrous tobacco smoke filter containing finely divided solids |
US2966157A (en) * | 1957-06-07 | 1960-12-27 | Eastman Kodak Co | Polyolefin tobacco smoke filters |
US3021242A (en) * | 1957-12-16 | 1962-02-13 | Eastman Kodak Co | Bonding additives onto filament filters |
US3026226A (en) * | 1957-12-09 | 1962-03-20 | Eastman Kodak Co | Process of manufacturing filters |
US3043736A (en) * | 1959-03-02 | 1962-07-10 | Eastman Kodak Co | Method for making additive filters |
-
1964
- 1964-01-28 US US340601A patent/US3311519A/en not_active Expired - Lifetime
-
1965
- 1965-01-25 BE BE658789D patent/BE658789A/xx unknown
- 1965-01-27 ES ES0308600A patent/ES308600A1/es not_active Expired
- 1965-01-27 CH CH1473266A patent/CH454715A/fr unknown
- 1965-01-27 CH CH110865A patent/CH442113A/fr unknown
- 1965-01-28 GB GB3806/65A patent/GB1100541A/en not_active Expired
- 1965-01-28 NL NL6501047A patent/NL6501047A/xx unknown
Patent Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
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NL36247C (US06811534-20041102-M00003.png) * | ||||
US928631A (en) * | 1908-04-16 | 1909-07-20 | Nazar Costikyan | Yarn-printing machine. |
US941530A (en) * | 1909-04-02 | 1909-11-30 | John Mckibbin | Machine for applying paste to cardboard, &c. |
US1488299A (en) * | 1923-02-15 | 1924-03-25 | Fuld And Hatch Knitting Compan | Yarn-dyeing device |
US2166740A (en) * | 1927-11-16 | 1939-07-18 | North American Rayon Corp | Manufacture of artificial silk |
US2612679A (en) * | 1950-10-23 | 1952-10-07 | Ladisch Rolf Karl | Filaments containing fillers |
US2881770A (en) * | 1954-05-27 | 1959-04-14 | Eastman Kodak Co | Fibrous tobacco smoke filters |
US2915069A (en) * | 1954-07-13 | 1959-12-01 | Olin Mathieson | Smoking device |
US2940456A (en) * | 1956-02-08 | 1960-06-14 | Eastman Kodak Co | Fibrous tobacco smoke filter containing finely divided solids |
US2966157A (en) * | 1957-06-07 | 1960-12-27 | Eastman Kodak Co | Polyolefin tobacco smoke filters |
US3026226A (en) * | 1957-12-09 | 1962-03-20 | Eastman Kodak Co | Process of manufacturing filters |
US3021242A (en) * | 1957-12-16 | 1962-02-13 | Eastman Kodak Co | Bonding additives onto filament filters |
US3043736A (en) * | 1959-03-02 | 1962-07-10 | Eastman Kodak Co | Method for making additive filters |
Cited By (47)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3438806A (en) * | 1965-05-20 | 1969-04-15 | American Cyanamid Co | Process for the manufacture of cigarette containing cyanamide-cellulose acetate filter elements |
US3388953A (en) * | 1966-10-06 | 1968-06-18 | Thomas Bede Foundation | Wet and dry towel dispenser |
US3607567A (en) * | 1968-01-02 | 1971-09-21 | Fmc Corp | Apparatus for nonwoven fabric manufacture |
US3661160A (en) * | 1970-01-28 | 1972-05-09 | Johnson & Johnson | Tobacco smoke filter |
US4000964A (en) * | 1973-12-15 | 1977-01-04 | Bsg Designs Inc. | Polychromatographic dyeing |
US9554594B2 (en) | 2003-09-30 | 2017-01-31 | R.J. Reynolds Tobacco Company | Filtered cigarette incorporating an adsorbent material |
US8066011B2 (en) | 2003-09-30 | 2011-11-29 | R. J. Reynolds Tobacco Company | Filtered cigarette incorporating an adsorbent material |
US20050066982A1 (en) * | 2003-09-30 | 2005-03-31 | Clark Melissa Ann | Filtered cigarette incorporating an adsorbent material |
WO2007028476A2 (de) * | 2005-09-05 | 2007-03-15 | Rhodia Acetow Gmbh | Filter oder filterelement für tabakrauch. zigarette mit einem derartigen filter oder filterelement und verfahren zur herstellung eines derartigen filters oder filterelementes |
WO2007028476A3 (de) * | 2005-09-05 | 2007-07-26 | Rhodia Acetow Gmbh | Filter oder filterelement für tabakrauch. zigarette mit einem derartigen filter oder filterelement und verfahren zur herstellung eines derartigen filters oder filterelementes |
US20100037905A1 (en) * | 2005-09-05 | 2010-02-18 | Maurer Guenter | Filter or filter element for tobacco smoke cigarette containing such a filter or filter element and method for producing such a filter or filter element |
WO2007033272A1 (en) | 2005-09-14 | 2007-03-22 | R. J. Reynolds Tobacco Company | Filtered smoking article |
US11383477B2 (en) | 2005-09-23 | 2022-07-12 | R.J. Reynolds Tobacco Company | Equipment for insertion of objects into smoking articles |
US20090090372A1 (en) * | 2005-09-23 | 2009-04-09 | R.J. Reynolds Tobacco Company | Equipment for Insertion of Objects into Smoking Articles |
US10123562B2 (en) | 2005-09-23 | 2018-11-13 | R.J. Reynolds Tobacco Company | Equipment for insertion of objects into smoking articles |
US9398777B2 (en) | 2005-09-23 | 2016-07-26 | R.J. Reynolds Tobacco Company | Equipment for insertion of objects into smoking articles |
US9028385B2 (en) | 2005-09-23 | 2015-05-12 | R.J. Reynolds Tobacco Company | Equipment for insertion of objects into smoking articles |
US8882647B2 (en) | 2005-09-23 | 2014-11-11 | R.J. Reynolds Tobacco Company | Equipment for insertion of objects into smoking articles |
US8739802B2 (en) | 2006-10-02 | 2014-06-03 | R.J. Reynolds Tobacco Company | Filtered cigarette |
US20080245377A1 (en) * | 2007-04-04 | 2008-10-09 | R.J. Reynolds Tobacco Company | Cigarette comprising dark-cured tobacco |
US8186360B2 (en) | 2007-04-04 | 2012-05-29 | R.J. Reynolds Tobacco Company | Cigarette comprising dark air-cured tobacco |
US20090288672A1 (en) * | 2008-05-21 | 2009-11-26 | R. J. Reynolds Tobacco Company | Cigarette Filter Comprising a Carbonaceous Fiber |
US8375958B2 (en) | 2008-05-21 | 2013-02-19 | R.J. Reynolds Tobacco Company | Cigarette filter comprising a carbonaceous fiber |
US8079369B2 (en) | 2008-05-21 | 2011-12-20 | R.J. Reynolds Tobacco Company | Method of forming a cigarette filter rod member |
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WO2011140430A1 (en) | 2010-05-07 | 2011-11-10 | R. J. Reynolds Tobacco Company | Filtered cigarette with modifiable sensory characteristics |
US8720450B2 (en) | 2010-07-30 | 2014-05-13 | R.J. Reynolds Tobacco Company | Filter element comprising multifunctional fibrous smoke-altering material |
US9119420B2 (en) | 2010-07-30 | 2015-09-01 | R.J. Reynolds Tobacco Company | Filter element comprising multifunctional fibrous smoke-altering material |
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US10609955B2 (en) | 2011-04-08 | 2020-04-07 | R.J. Reynolds Tobacco Company | Filtered cigarette comprising a tubular element in filter |
US11957163B2 (en) | 2011-04-08 | 2024-04-16 | R.J. Reynolds Tobacco Company | Multi-segment filter element including smoke-altering flavorant |
WO2013043806A2 (en) | 2011-09-23 | 2013-03-28 | R. J. Reynolds Tobacco Company | Mixed fiber product for use in the manufacture of cigarette filter elements and related methods, systems, and apparatuses |
EP3456212A1 (en) | 2011-09-23 | 2019-03-20 | R. J. Reynolds Tobacco Company | Mixed fiber product for use in the manufacture of cigarette filter elements and related methods, systems, and apparatuses |
US10076135B2 (en) | 2014-05-23 | 2018-09-18 | Greenbutts Llc | Biodegradable cigarette filter tow and method of manufacture |
Also Published As
Publication number | Publication date |
---|---|
BE658789A (US06811534-20041102-M00003.png) | 1965-05-17 |
ES308600A1 (es) | 1965-07-01 |
NL6501047A (US06811534-20041102-M00003.png) | 1965-07-29 |
GB1100541A (en) | 1968-01-24 |
CH442113A (fr) | 1967-08-15 |
CH454715A (fr) | 1968-04-15 |
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