US3811451A - Tobacco smoke filter - Google Patents

Tobacco smoke filter Download PDF

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Publication number
US3811451A
US3811451A US00287803A US28780372A US3811451A US 3811451 A US3811451 A US 3811451A US 00287803 A US00287803 A US 00287803A US 28780372 A US28780372 A US 28780372A US 3811451 A US3811451 A US 3811451A
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US
United States
Prior art keywords
filtering material
portions
smoke
filter
mandrel
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
Application number
US00287803A
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English (en)
Inventor
R Berger
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.)
Filtrona Richmond Inc
Original Assignee
American Filtrona Corp
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
Application filed by American Filtrona Corp filed Critical American Filtrona Corp
Priority to US00287803A priority Critical patent/US3811451A/en
Priority to DE2343327A priority patent/DE2343327C2/de
Priority to GB4158373A priority patent/GB1420116A/en
Priority to FR7332476A priority patent/FR2199251A5/fr
Priority to CH1295273A priority patent/CH573720A5/xx
Priority to IT28758/73A priority patent/IT998580B/it
Priority to CA180,762A priority patent/CA991046A/en
Priority to US00434223A priority patent/US3847064A/en
Application granted granted Critical
Publication of US3811451A publication Critical patent/US3811451A/en
Priority to CA242,384A priority patent/CA993303A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter tips or filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces of 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
    • A24D3/0225—Applying additives to filter materials with solid additives, e.g. incorporation of a granular product

Definitions

  • 131 105 x rial is permitted to extended transversely completely 2,954,773 lO/l960 Lebert l3l/l0.5 across the bonding zone before being contacted with 3,045.680 7/1962 Smi1h 131/105 th St am so as to form a smoke-permeable plug of fil- OTHER PUBLICATIONS Hawkins, Def. Pub. Search Copy of Serial No. 775,576, filed 9-12-65, published in 860 O6 1007, Def. Publ. No. T860,0l3.
  • Selected cavities may be partially or completely filled with an additive passing through the mandrel which can be hollow, as the mandrel is withdrawn during its rearward stroke.
  • This invention relates to the production of filter means and relates more particularly to tobacco smoke filter elements. More specifically, the instant inventive concepts are primarily concerned with producing filter means for cigarettes, although the products of this invention are generally useful as filters, particularly for tobacco smoking means, whether they be cigarettes, cigars, pipes or the like. Since filters for cigarettes are particularly commercially important, the basic embodiments of the instant invention will be discussed as they relate to the production offiltered cigarettes.
  • filtration efficiency is ordinarly measured in terms of the percentage of total particulate matter (TPM) removed from the smoke, although there is also some concern for the percentage of gas phase constituents which a filter means is capable of removing. While filtration efficiency is perhaps the most important property of cigarette filter means, it has been necessary, with prior art filter devices, to compromise the filtration efficiency in order to provide such filters with other properties, such as pressure drop, taste, hardness, appearance and cost, which are important from the stand-point of commercial acceptability.
  • the most commonly utilized'cellulose ac: etate filter means has a relatively low filtration efficiency since increased efficiency can only be obtained either by increasing the density of the filter material or the length of the filter element, both of which produce a pressure drop across the filter which is excessive and unacceptable from a commercial stand-point.
  • filter means which have improved filtering properties
  • prior art developments, for the most part have not been commercially acceptable either because the resulting filter means have been found to have objectionable taste" characteristics whereby cigarettes provided with such filtering means fail to satisfy a large segment of the smoking public, or because the techniques and/or the materials utilized in the production of such filter means have increased the cost excessively.
  • Cigarette filters having such properties are presently being produced in accordance with the teachings of US. Pat. Nos. 3,533,416, 3,599,646, and 3,648,71 I. Yet, the production ofa cigarette filter having even a slightly increased filtration efficiency, without detrimentally affecting other desirable properties, e.g., pressure drop and the like, would be commercially important. Moreover, the production of a cigarette filter or the like having equivalent filtration efficiency, but utilizing substantially less material, thereby minimizing the cost of manufacturing, would also be quite commercially important. It is extremely significant to be able to provide improved filtration efficiency for a given level of pressure drop. Moreover, it is highly desirable to provide techniquesfor the production of cigarette filters and the like which are readily adaptable to produce filter elements having a variety of characteristics enabling the manufacturer to select various features for his filter means almost at will.
  • a very basic object of this invention is to enable the manufacture of filter means for cigarettes and the like wherein the filtration efficiency is increased for a given level of pressure drop.
  • a still further object of this invention is to provide methods for the manufacture of cigarette filter means which are simple and inexpensive to operate, while enabling high speed operation and which utilize relatively small amounts of filtering materials since a large proportion of the filtering material in each filter means is available to perform its'primary function, that is, removal of undesirable constituents from smoke.
  • Another object of this invention is to provide a cigarette filter means which may have various characteristics, including both particulate matter filtration efficiency as well as gas phase filtration efficiency, if desired.
  • a further basic object of this invention is to provide for the production of cigarette filter means which may have various configurations to'provide the final filtered cigarette with an aesthetically 'pleasing appearance.
  • FIG. 1 is an enlarged longitudinal cross-sectional view showing a portion of a method and means for producing filter elements according to theinstant inventive concepts, selected elements being shown in alternate positions in dotted lines;
  • FIG. 2 is a schematic cross-sectional view showing the deposition of an additive into alternate cavities of a filter rod as it is being produced;
  • FIG. 3 is a longitudinal cross-sectional view through one form of filter rod that can be produced according to the instant inventive concepts, showing how such a rod can be sub-divided to provide individual filter elements of selected characteristics;
  • FIG. 4 is an enlarged perspective view, partially in cross-section, showing a portion of a filtered cigarette incorporating a filter element according to one embodiment of the instant inventive concepts, parts being FIGS. 8-14 are'elevationalviews of various filter elements which can. be made in accordance with the instant invention, having different configurations for aesthetic and functional purposes.
  • FIG. 1 of this application shows a portion of a slightly modified form of the apparatus shown in FIGS. 1 and 19 of U.S. Pat. No. 3,637,447.
  • the remaining portions of the apparatus according to the instant inventive concepts, as well as the techniques utilized, conform quite closely to those shown in the aforementioned patent and reference may be had to that disclosure for such details.
  • the products of this invention are preferably and primarily formed from a continuous tow of cellulose acetate filamentary material
  • the instant disclosure is not to be limited to this concept, since with slight modifications obvious to those skilled in the art, filamentary tow formed of other materials such as polyethylene, polypropylene and the like can be utilized, and, moreover, non-woven staple fibers of the type described in some detail in U.S. Pat. Nos. 3,297,041 and 3,552,400, also commonly assigned, the disclosures of which are incorporated herein by reference, may also be utilized.
  • cellulose acetate filamen-' tary tow is the preferred material from a commercial stand-point, the remainder of this specification will be directed to the use of such material.
  • a portion of a method for forming filter elements according to the instant inventive concepts is designated generally by the reference numeral 20 and the portion shown will be seen to include air nozzle of stuffenjet 22 spaced along the path of travel of a filtering material 24 toward a first curing station 26.
  • the first curing station 26 is similar in construction to the element in US. Pat. No. 3,636,447, although somewhat further details are shown in the instant application. Specifically, this first curing station which may be referred to as a bonding zone includes a generally cylindrical'portion 28 and a flared or conical entry portion 30.
  • steam or other means capable of activating a bonding agent within the filtering material is introduced through a conduit 36 into a manifold 38 from which it passes through a multiplicity of spaced apertures 40 into the tow intermediate the path of travel of the tow through the cylindrical portion 28 of the bonding zone 26.
  • an elongated band of filtering material 24 enters the rearward end of the stufferjet 22 passing around a mandrel support 42 to form, at this point, a generally hollow tubular element which continues to be movedforwardly around a mandrel 44 actually disposed within the stuffer-jet 22 and passing at least partially into the bonding zone 26.
  • the tow emerges from the forward end of the stuffer jet 22 it is mixed with air supplied from the conduit 32.
  • Adjustments of the various elements of the stuffer-jet 22 in the manner described in U.S. Pat. No. 3,636,447 creates a venturilike opening at the exit of the stuffer-jet 22 to cause the emerging tow to explode or bloom" as shown at 46 into a uniformly random fluffy mass before passing into the bonding zone or curing station 26.
  • the heating and shaping apparatus for to the longitudinal axis in a direction opposite to the direction of movement of the tow, the steam enters the tow, between the fibers and contacts the fibers as they are being gathered together. All of the fibrous members and all 'of the plasticizer are thus generally substantially uniformly heated whereby a substantially uniform bonding at spaced contact points of the fibrous members if effected.
  • a smoke-permeable generally cylindrical continuous rod would be formed as the tow passed through the first curing station 26.
  • the presence of the mandrel 44 defines within the bonding zone 26 an annular space through which the filtering material must pass thereby forming, instead of what may be called a solid rod, an internal cavity, that is, a hollow rod.
  • the product that exits from the first curing station is, in fact, a continuous hollow or annular element. It is at this point that instant inventive concepts depart from the teachings of the aforementioned U.S. Patent.
  • the mandrel 44 is provided with means 48 which function to reciprocate the mandrel within its supporting element 42, and more specifically, which function to reciprocate the forwardv end portion 50 of the mandrel'44' between a first position which is at least as far forward in the path of travel of the filtering material 24 as the point at which the filtering material is contacted by the bonding agent, and a second position, designated by dotted lines 52 spaced rearwardly of such point.
  • the reciprocating means 48 can comprise any mechanical construction capable of moving the mandrel 44 forwardly and rearwardly along the axis of the processing machinery.
  • a link 54 is pivoted at one end 56 to a bracket 58 carried by the rearward portion of the mandrel 44 and is pivoted intermediate its ends as designated at 60 to some fixed support (not shown).
  • the opposite end of the link 54 carries a cam follower or roller 62 normally urged into contact with an eccentric 64 by a spring means 66.
  • the filtering material 24 is confined within an annular space between the exterior of the mandrel 44 and the interior of the cylindrical portion 28 of the bonding zone 26. Since the filtering material is contacted with steam or some equivalent bonding agent at this point, the fibrous members of the filtering material are formed into a smoke-permeable annular wall portion 68.
  • the internal cavities can be filled or partially filled, or selected cavities can be filled with an additive material, such as, for example, a sorbent smokemodifying material.
  • the mandrel 44 maybe made hollow as shown in FIG. 1 and an additive source 74 can communicate with the rear end of the mandrel 44 through a flexible conduit 76.
  • an additive source 74 can communicate with the rear end of the mandrel 44 through a flexible conduit 76.
  • a preselected quantity or charge of additive material may be fed through the mandrel into one or more selected cavities as the mandrel is being moved rearwardly during its return stroke.
  • the operation of the additive feeding means can be so coordinated with the manufacture of the filter rod that additive material in any desired quantity can be fed into each and every cavity being formed, or only into selected, such as alternate, cavities.
  • the additive material may be particulate in nature such as activated carbon or, perhaps, silica gel or othersuch sorbent materials, an additive of this type being designated generally by the reference numeral 78, or alternatively it may be a mixture of such materials andall be readily varied well within the skill of the art.
  • filter elements may be provided having a single internal cavity, or alternatively, a plurality of internal cavities, one or more of which maybe filled with an additive material so as to provide filterelements having any desirable combination of characteristics, depending upon the intended use therefor.
  • filter element 106 wrapped with cigarette paper 104 and secured-in end- 1 to-end relationship with a filter element according to the instant inventive concepts designated generally by the reference numeral 106.
  • the inner member which is a sub-divided portion of the filter rod manufactured according to the techniques shown in FIG. 1 is referred to generally as l08and will be seen to comprise a plug 110 at the mouth-piece end, the external surface of I which is juxtaposed to the internal surface of the overwrapping material 112 to form the aforementioned sealed area.
  • a tipping overwrap 114 is illustrated to secure the filter portion to the tobacco portion in a conventional manner.
  • the annular wall of the filter element 106 will be seen at 116 as will the internal cavity at l 18.
  • one end of the filter element 106 has been crimped, in the manner described in US. Pat. No. 3,637,447 to form a plurality of cruciform-shaped fins 120, the external or peripheral edges of which are in contact with the internal surface of the overwrapping'material 112 in order 7. to assist in centering the inner member within the outer member.
  • the filter means according to this invention can be used either singly or doubly, or'in fact in any multiple units.
  • the smoke must actually pass four times through the filtering material, considering the fact that it passes through one'of the end plugs, into the internal cavity 122, through the filtering material again into the external cavity 130, back through the filtering material into the
  • the embodiment of FIG. 7 is quite similar to the previous embodiments, with the exception that it is provided with a plurality of external, longitudinally extending. cavities 132 formed between ribs 134 almost in the manner of a gear. Of course, such cavities cannot extend the full length of the exterior of the filter element since it is necessary to provide an uninterrupted circumferential surface at one end of the filter element in order to produce the necessary sealed area which forces the smoke through the filtering material and precludes by-passing.
  • the cavities 132 increase the external surface area of the filter element permitting a greater capability for the smoke to pass the length of the filter element into the internal cavity, which in the embodiment of FIG. 7 is shown as filled with a sorbent smoke-modifying additive material.
  • filtering material is to function to eliminate or reduce undesirable constituents from smoke passing therethrough, and with respect to the fibers or filamentary portion of the filter element, it is especially the particulate matter or solid phase constitutents of the smoke that are being affected.
  • each filter element according to the instant inventive concepts includes at least one end portion which is in the form of a smoke-permeable uncrimped plug, the outer surface of this portion at least in part forming the sealed area with the overwrapping material.
  • each filter element produced according to the instant inventive concepts is the presence of at least one internal totally enclosed cavity means surrounded by the filtering material.
  • an internal cavity means wherein the filtering material that formed or defined the cavity was integral both with respect to the end portions and the'annular or peripheral wall extending therebetween.
  • the instant inventive concepts enable the production of a filter element having increased filtration efficiency for a given pressure drop, while retaining all of the other desirable characteristics of cigarette filters, including such properties as taste, appearance and minimized cost through simplicity in manufacturing techniques and apparatus as well as reduction in the quantity of filtering material for a given level of efficiency.
  • filter elements of the type shown, for example, in FIG. 2 may be utilized by themselves, with no subsequent crimping necessary, providing a plug of smoke-permeable material extending transversely completely across each end of the filter element with, if desired, a sorbent smoke modifying additive provided therewithin during the manufacturing process in an extremely simplified manner and by' a technique which precludes channeling of the smoke past the additive particles increasing the gas phase efficiency of the final product as well.
  • crimping can be utilized to modify the appearance or functional properties of the filter means, again emphasising the versatility of the instant inventive concepts, both from the standpoint of manufacturing and the final product characteristics.
  • a smoke filter means including a filter element comprising:
  • said outer member including an inner surface and having spaced end portions
  • said inner member comprising a filtering material and including an outer surface and having spaced end portions;
  • integral peripheral portions of said outer surface of said inner member being juxtaposed to portions of said inner surface of said outer member to at least substantially preclude axial passage of smoke across the area therebetween;
  • integral, longitudinally spaced first and second portions of said inner member extending transversely across the full diameter of said inner member in the form of plugs of filtering material including means defining a tortuous path for smoke therethrough, the outer surfaces of said integral first and second portions of said inner member at least partially defining said peripheral portions;
  • said inner and outer cavity means each having less resistance to flow of smoke than said filtering material, whereby smoke passing through said filter element from one end portion of said inner member to the other end portion thereof must pass through said outer cavity means and each of said inner cavity members and must pass at least four times through said filtering material.
  • a cigarette comprising, in combination, a tobacco rod and a filter means secured in end-to-end relationship to one end of said tobacco rod, said filter means including a filter element as defined in claim 1.

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  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
US00287803A 1972-09-11 1972-09-11 Tobacco smoke filter Expired - Lifetime US3811451A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US00287803A US3811451A (en) 1972-09-11 1972-09-11 Tobacco smoke filter
DE2343327A DE2343327C2 (de) 1972-09-11 1973-08-28 Tabakfilterelement sowie Verfahren und Vorrichtung zur Herstellung eines Tabakfilterelements
GB4158373A GB1420116A (en) 1972-09-11 1973-09-04 Tobacco smoke filter elements
CH1295273A CH573720A5 (it) 1972-09-11 1973-09-10
FR7332476A FR2199251A5 (it) 1972-09-11 1973-09-10
IT28758/73A IT998580B (it) 1972-09-11 1973-09-11 Filtro per fumo di tabacco
CA180,762A CA991046A (en) 1972-09-11 1973-09-11 Tobacco smoke filter
US00434223A US3847064A (en) 1972-09-11 1974-01-17 Tobacco smoke filter
CA242,384A CA993303A (en) 1972-09-11 1975-12-23 Tobacco smoke filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00287803A US3811451A (en) 1972-09-11 1972-09-11 Tobacco smoke filter

Publications (1)

Publication Number Publication Date
US3811451A true US3811451A (en) 1974-05-21

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US00287803A Expired - Lifetime US3811451A (en) 1972-09-11 1972-09-11 Tobacco smoke filter

Country Status (7)

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US (1) US3811451A (it)
CA (1) CA991046A (it)
CH (1) CH573720A5 (it)
DE (1) DE2343327C2 (it)
FR (1) FR2199251A5 (it)
GB (1) GB1420116A (it)
IT (1) IT998580B (it)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3994306A (en) * 1975-12-24 1976-11-30 American Filtrona Corporation Tobacco smoke filter
US4037524A (en) * 1976-11-08 1977-07-26 Liggett Group Inc. Apparatus for combining a tube with a cigarette filter
US4075936A (en) * 1975-10-31 1978-02-28 American Filtrona Corporation Method and apparatus for making tobacco smoke filter
DE2751559A1 (de) * 1976-11-19 1978-05-24 British American Tobacco Co Tabakrauchfilter
US4273141A (en) * 1977-03-14 1981-06-16 Jan Van Tilburg Smoke filters
US4492238A (en) 1981-09-30 1985-01-08 Philip Morris Incorporated Method and apparatus for production of smoke filter components
US4869274A (en) * 1986-07-23 1989-09-26 Berger Richard M Cooling apparatus for use in the manufacture of tobacco filters
US4942887A (en) * 1987-06-15 1990-07-24 Fabriques De Tabac Reunies, S.A. Filter mouthpiece for a smoking article
US5195543A (en) * 1991-10-28 1993-03-23 American Filtrona Corporation Balanced flow tobacco smoke filter
US20050066980A1 (en) * 2003-09-30 2005-03-31 Crooks Evon Llewellyn Filtered cigarette incorporating an adsorbent material
CN104427891A (zh) * 2012-02-16 2015-03-18 R.J.雷诺兹烟草公司 用于形成吸烟制品的过滤嘴部件的设备和有关的方法
CN106942788A (zh) * 2017-04-26 2017-07-14 云南中烟工业有限责任公司 一种含有贯通式锥形空腔结构的复合滤棒及其制作方法
US10182592B2 (en) * 2010-03-16 2019-01-22 Japan Tobacco Inc. Filter manufacturing machine
US11291242B2 (en) 2019-08-28 2022-04-05 Aiger Group Ag Apparatus and method for forming a smoke filter

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH627056A5 (it) * 1977-12-15 1981-12-31 Baumgartner Papiers Sa
DE4118815C2 (de) * 1991-06-07 1996-02-01 Bat Cigarettenfab Gmbh Verfahren zur Herstellung eines Cigarettenfilters und nach diesem Verfahren hergestellter Cigarettenfilter
DE102024123324A1 (de) * 2024-08-15 2026-02-19 Körber Technologies Gmbh Aufbringen eines Zusatzstoffes auf einen Filterstrang der Tabak verarbeitenden Industrie

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2954773A (en) * 1958-01-23 1960-10-04 Mac Farland Aveyard & Company Cigarette filters and method of making same
US3045680A (en) * 1958-09-30 1962-07-24 Millard F Smith Smoke filtering device
US3313306A (en) * 1965-10-22 1967-04-11 American Filtrona Corp Stable elongated elements and smoking means incorporating the same
US3348553A (en) * 1965-03-09 1967-10-24 Emkay Inc Smoker's mouthpiece
US3533416A (en) * 1968-05-08 1970-10-13 American Filtrona Corp Tobacco smoke filter
US3599646A (en) * 1969-04-30 1971-08-17 American Filtrona Corp Cigarette filter
US3648711A (en) * 1970-08-11 1972-03-14 American Filtrona Corp Tobacco smoke filter
US3690326A (en) * 1969-11-07 1972-09-12 American Filtrona Corp Cigarette filter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1850101A (en) * 1929-05-04 1932-03-22 Oscar V Greene Filter mechanism
GB1099922A (en) * 1964-02-07 1968-01-17 Desmond Walter Molins Improvements in or relating to filter tips for cigarettes
GB1236208A (en) * 1967-09-15 1971-06-23 Molins Machine Co Ltd Improvements in or relating to mouthpieces for cigarettes
US3637447A (en) * 1970-06-10 1972-01-25 American Filtrona Corp Method of making filter means by crimping and overwrapping a tubular element
GB1318113A (en) * 1970-10-01 1973-05-23 Cigarette Components Ltd Tobacco smoke filter

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2954773A (en) * 1958-01-23 1960-10-04 Mac Farland Aveyard & Company Cigarette filters and method of making same
US3045680A (en) * 1958-09-30 1962-07-24 Millard F Smith Smoke filtering device
US3348553A (en) * 1965-03-09 1967-10-24 Emkay Inc Smoker's mouthpiece
US3313306A (en) * 1965-10-22 1967-04-11 American Filtrona Corp Stable elongated elements and smoking means incorporating the same
US3533416A (en) * 1968-05-08 1970-10-13 American Filtrona Corp Tobacco smoke filter
US3599646A (en) * 1969-04-30 1971-08-17 American Filtrona Corp Cigarette filter
US3690326A (en) * 1969-11-07 1972-09-12 American Filtrona Corp Cigarette filter
US3648711A (en) * 1970-08-11 1972-03-14 American Filtrona Corp Tobacco smoke filter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Hawkins, Def. Pub. Search Copy of Serial No. 775,576, filed 9 12 65, published in 860 06 1007, Def. Publ. No. T860,013. *

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4075936A (en) * 1975-10-31 1978-02-28 American Filtrona Corporation Method and apparatus for making tobacco smoke filter
US3994306A (en) * 1975-12-24 1976-11-30 American Filtrona Corporation Tobacco smoke filter
US4037524A (en) * 1976-11-08 1977-07-26 Liggett Group Inc. Apparatus for combining a tube with a cigarette filter
DE2751559A1 (de) * 1976-11-19 1978-05-24 British American Tobacco Co Tabakrauchfilter
US4213470A (en) * 1976-11-19 1980-07-22 British-American Tobacco Company Limited Tobacco-smoke filters
US4273141A (en) * 1977-03-14 1981-06-16 Jan Van Tilburg Smoke filters
US4492238A (en) 1981-09-30 1985-01-08 Philip Morris Incorporated Method and apparatus for production of smoke filter components
US4869274A (en) * 1986-07-23 1989-09-26 Berger Richard M Cooling apparatus for use in the manufacture of tobacco filters
US4942887A (en) * 1987-06-15 1990-07-24 Fabriques De Tabac Reunies, S.A. Filter mouthpiece for a smoking article
US5195543A (en) * 1991-10-28 1993-03-23 American Filtrona Corporation Balanced flow tobacco smoke filter
US20050066980A1 (en) * 2003-09-30 2005-03-31 Crooks Evon Llewellyn Filtered cigarette incorporating an adsorbent material
US7669604B2 (en) * 2003-09-30 2010-03-02 R.J. Reynolds Tobacco Company Filtered cigarette incorporating an adsorbent material
US10182592B2 (en) * 2010-03-16 2019-01-22 Japan Tobacco Inc. Filter manufacturing machine
CN104427891A (zh) * 2012-02-16 2015-03-18 R.J.雷诺兹烟草公司 用于形成吸烟制品的过滤嘴部件的设备和有关的方法
CN104427891B (zh) * 2012-02-16 2018-04-10 R.J.雷诺兹烟草公司 用于形成吸烟制品的过滤嘴部件的设备和有关的方法
CN106942788A (zh) * 2017-04-26 2017-07-14 云南中烟工业有限责任公司 一种含有贯通式锥形空腔结构的复合滤棒及其制作方法
CN106942788B (zh) * 2017-04-26 2023-06-20 云南中烟工业有限责任公司 一种含有贯通式锥形空腔结构的复合滤棒及其制作方法
US11291242B2 (en) 2019-08-28 2022-04-05 Aiger Group Ag Apparatus and method for forming a smoke filter

Also Published As

Publication number Publication date
IT998580B (it) 1976-02-20
CA991046A (en) 1976-06-15
GB1420116A (en) 1976-01-07
FR2199251A5 (it) 1974-04-05
DE2343327C2 (de) 1985-05-23
CH573720A5 (it) 1976-03-31
DE2343327A1 (de) 1974-03-21

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