EP0014477A1 - Procédé et appareil pour former une tige de filtre contenant un matériau particulaire, notamment une tige de filtre imprégnée de charbon de bois - Google Patents

Procédé et appareil pour former une tige de filtre contenant un matériau particulaire, notamment une tige de filtre imprégnée de charbon de bois Download PDF

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Publication number
EP0014477A1
EP0014477A1 EP80100669A EP80100669A EP0014477A1 EP 0014477 A1 EP0014477 A1 EP 0014477A1 EP 80100669 A EP80100669 A EP 80100669A EP 80100669 A EP80100669 A EP 80100669A EP 0014477 A1 EP0014477 A1 EP 0014477A1
Authority
EP
European Patent Office
Prior art keywords
web
particulate material
applicator
periphery
deposit station
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.)
Withdrawn
Application number
EP80100669A
Other languages
German (de)
English (en)
Inventor
Reiner G. Brinker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philip Morris USA Inc
Original Assignee
Philip Morris USA Inc
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 Philip Morris USA Inc filed Critical Philip Morris USA Inc
Publication of EP0014477A1 publication Critical patent/EP0014477A1/fr
Withdrawn legal-status Critical Current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 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
    • A24D3/0225—Applying additives to filter materials with solid additives, e.g. incorporation of a granular product

Definitions

  • U.S. Patent 3,844,200 discloses method and apparatus in which a quantity of a granular form of smoke treating material, e.g., charcoal, clay, resins, etc. is deposited into a U-shaped filter material mass after which the legs of the U are closed to form a generally cylindrically shaped article containing spaced apart, centrally located pockets of the granular material. The article or continuous rod is then sectioned into appropriate lengths to provide individual cigarette filter components each containing a pocket of granular Material.
  • a granular form of smoke treating material e.g., charcoal, clay, resins, etc.
  • the article or continuous rod is then sectioned into appropriate lengths to provide individual cigarette filter components each containing a pocket of granular Material.
  • Such component thus has the disadvantage that the granular material is centralized so that . at marginal encircling portions of the component, the smoke passes directly through the component without contacting the granular treating material.
  • the present invention relates to a method and apparatus for forming a continuous filter rod of a fibrous material which is impregnated with or contains substantially uniformly di s t r i-mped throughout the mass of the fibrous material, a particulate or granular material such as charcoal, a smoking treating resin material and the like.
  • the continuous rod may be wrapped in.a wrapper material in conventional manner and thereafter be sectioned into lengths for delivery to the cigarette making operation and ultimate incorporation in cigarettes as smoke treating and filtering components.
  • a bloomed and laterally widened, relatively thin, flat web of filter material such as a plasticized cellulose acetate tow is fed or advanced at a predetermined speed in a fixed line of travel which will take if past a deposit station at which the particulate material is to be deposited on and distributed substantially uniformly throughout the tow.
  • a source of particulate material, such as granular charcoal in a hopper is disposed at the deposit station and has .an outflow, e.g., hopper bottom opening located adjacently above the web travel course.
  • a rotary roller applicator is supported for rotation about a fixed axis transverse to the direction of web travel and is so positioned that a peripheral length portion of the roller applicator passes through the particulate material at the hopper outflow and propels particulate material onto the web, the propelling force being effective to distribute the charcoal uniformly throughout the web.
  • the roller applicator rotates such that its peripheral speed is substantially equal to the travelling speed of the web and moreover, the roller applicator periphery closest point of approach to the Web is maintained such as to prevent deflection transmissive contact of the roller periphery with the web which, e.g., occurs with the roller 46 of the device described in U.S. Patent No. 3,844,200.
  • a guiding ring In directing the web of tow in its travel from a stock thereof toward the deposit station, a guiding ring is employed to contact and align the tow in its travel course.
  • a guiding ring is located an appreciable distance upstream of the deposit station so that having once passed the guiding ring, the web is unconstrained in its travel course therefrom to and through the deposit station, and for an appreciable distance beyond the . deposit station.
  • Unconstrained as used herein is intended to mean the free travel of the tow web along a travel course in which the web does not come into contact with any structure or be acted upon by any force or influence as would tend to alter its particular state of cohesiveness, unintended spreading or bunching together of the fibers being an example of an undesirable alteration.
  • a further feature of the invention involves the feeding of charcoal onto the tow web across its full lateral expanse and for such purpose, the peripheral length of the rotary roller applicator which passes through the particulate material at the outflow of the hopper is less than the width of the tow, to allow that lateral cascade of charcoal issuing from the ends of the roller applicator reaches and invests the web at its marginal regions at the deposit station but such cascade does not overreach said mar g- ins and thereby spill over off the web.
  • the invention also provides apparatus for forming the filter rod, the rotary roller applicator desirably being provided as an elongated cylindrical structure having a plurality of spaced axially extending pockets at the periphery thereof with such pockets in a preferred embodiment being defined by means of a plurality of axially extending circularly spaced rods mounted on a cylindrical core member in an arrangement such that each pair of adjacent rods define a pocket.
  • the pockets defined by each adjacent pair of rods become-filled with the charcoal and the charcoal is carried around from the point at which the charcoal is picked up and propelled from the pocket onto the advancing tow web at the deposit station.
  • the rods which extend axially of the periphery of the cylindrical core member preferably are provided as stainless steel members and can be replaceably mounted on the core structure by means of removable end plate structures in which the rods are received.
  • the section 10 of rod shown is as it appears after same has been impregnated with particulate material, formed into a cylindrical shape and covered in an outer wrapping such as a conventional filter "plug wrap".
  • The,rod section 10 includes a mass of compressed fibrous materials comprising intersecting and similarly arrayed lengths of individual fibers 12 and throughout the three-dimensional mass of which is distributed particles 14 of charcoal.
  • FIG. 5 which diagrammatically de- p icts the manner of operation of the present invention
  • a web 16 of a bloomed laterally widened relatively thin and plasticized tow is advanced from a stock source thereof (as in FIG. 1) in a course which takes it around a guidance roller unit 22 following which the w eb advances through a guiding ring 24 employed to ensure proper alignment and width adjustment of the advancing web when it reaches the deposit station 26 at which the particulate material, in this instance, charcoal, is deposited on the web.
  • a hopper 28 having a lower terminus chute section 30 for gravity delivery of the charcoal to an outflow opening 32 at the bottom of the chute section.
  • Such outflow opening 32 is disposed adjacent to but a distance above the travelling web 16 and it is also located adjacent the rotating travel course of the periphery of a rotary roller applicator 40.
  • the rotary applicator 40 is disposed for rotation about an axis 42 disposed transverse of the travel course of the web and the applicator so arranged that a peripheral length portion'thereof passes through the charcoal at the outflow 32 to pick up charcoal in the pockets 44 present at the outer periphery of the roller applicator and thence propelled outwardly from said pockets onto the travelling web.
  • the pockets 44 are defined by adjacent ones of a plurality of rods 48 extending axially along the surface of the roller applicator.
  • the rotary roller applicator 40 is operated at a speed so as to produce a peripheral speed therein which is substantially, equal to the travelling speed of the web 16, which speed can be, e.g., 150,000 mm/min.
  • the invention provides that the full width of the web is impregnated with charcoal at the deposit station. To achieve.. this without producing any spillover of charcoal from the web at its margins, the length of periphery of the roller applicator 40 which rotates in the charcoal at chute opening 32 is made a p re- determined distance less than the width of the tow. -This is achieved by narrowing in the side walls of the chute section 30 and hence limiting-the length of opening 32 so that it is about 1/2" narrower at each end than the span between the margins of the web at the point of deposit of charcoal onto the web. In such manner lateral cascade (i.e., axially of the applicator) of charcoal reaches and invests the side marginal regions of the web but does not overflow therefrom. The differences are shown by the lines A-A and B-B in FIG. 3 which respectively denote the web width at the point of deposit, and the length of opening 32.
  • the same does not come into contact with any structure or under influence of any force as would alter its character.
  • the mounting of the rotary roller applicator 40 is such that the periphery of the rotary roller applicator is maintained to prevent any deflection transmissive contact'of the roller periphery with the web.
  • the applicator member actually contacts the tow and thus promotes the undesirable conditions noted above.
  • the apparatus 70 includes a drive housing 72 in which is disposed various drive sprockets 74 and driving belt 76 which are employed to impart rotary drive to the rotary roller applicator 40.
  • Such drive is synchronized to impart to the rotary roller applicator a peripheral speed substantially equal to that of the travelling web 16..
  • a vertically disposed hopper 28 employed to contain a quantity of granular material, for example, charcoal.
  • the hopper is of taperihg configuration, that is, it has a lower downwardly and inwardly tapering terminus chute section 30 which terminates in an outflow opening 32 disposed adjacent the periphery of the rotary roller applicator 40. Such outflow is also spaced a distance above the travelling web.
  • the guidance roller 22 and guiding ring 24 which ,latter component as noted earlier serves to align and properly orient the travelling laterally widened relatively thin web to present it in a fixed straight line travel course of certain width ias it passes beneath the rotary roller applicator.
  • the web continues its travel leftwardly (FIG. 1), the same is as indicated unconstrained until it reaches the area of the.ton g u e guide assembly 82 which component serves to form the tow web into a generally cylindrical shape.
  • plug wrap material 84 Concurrently with the passage of the now cylindrically configured tow web through the tongue guide assembly 82, there is advanced at the underside of same a continuous length of plug wrap material 84 which by means of a device well known to those skilled in the art wraps the plug wrap in a fully enclosing course about the cylindrically shaped web.
  • the tow advancing from a stock thereof as at roll 20 is bloomed or opened up by means of air jets in conventional fashion and-can be sprayed with a liquid form of plasticizer such as triacetin to effect adhesion of the fibers of the tow where they have crossing points with other fibers and hence produce a cohesive three-dimensional structure.
  • a liquid form of plasticizer such as triacetin
  • the tow entering the guiding ring 24 contacts the same at the lateral edges of its mass after passing in contact under guiding roller 22. However, once the tow has passed beyond the guiding ring 24 it is no longer in its travel course in contact with any other part or surface within the overall apparatus structure until it passes through the tongue guide assembly 82 leaving the latter through its end aperture 90 in the form of a generally cylindrically shaped continuous member.
  • the rotary roller applicator 40 is comprised of a generally elongated cylindrical core 100 which is provided at its opposite ends with retainer plates 102 fastened to the core 100 by means of screws 104, the inner faces of the retainer plates carrying annular mounting rings 106 each of which is provided with a series of circularly spaced holes for reception of a like plurality of stainless steel rods 48 which lay against the outer surface of the core.
  • 20 rods are employed and each is 1/8" in diameter.
  • the rods 48 function to provide between adjacent pairs of each, a pocket 44 at the periphery of the rotary roller applicator for picking up charcoal at the outflow from the hopper 28 and propelling same onto the travelling web to uniformly distribute the charcoal throughout the web structure.
  • the guiding ring 24 is made adjustable and for such purpose is slidably received in bracket 110 and an adjusting nut arrangement shown at 112 and 114 can be employed to elevate or lower the'ring.
  • the present invention thus provides improved method and apparatus for making a filter rod in which charcoal is substantially uniformly distributed throughout a filter material mass and effects same with practically no waste of charcoal in the impregnation operation and, accordingly, less dust is created and a more uniform ultimate product is obtained.

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  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
EP80100669A 1979-02-12 1980-02-11 Procédé et appareil pour former une tige de filtre contenant un matériau particulaire, notamment une tige de filtre imprégnée de charbon de bois Withdrawn EP0014477A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US1175879A 1979-02-12 1979-02-12
US11758 1979-02-12

Publications (1)

Publication Number Publication Date
EP0014477A1 true EP0014477A1 (fr) 1980-08-20

Family

ID=21751848

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80100669A Withdrawn EP0014477A1 (fr) 1979-02-12 1980-02-11 Procédé et appareil pour former une tige de filtre contenant un matériau particulaire, notamment une tige de filtre imprégnée de charbon de bois

Country Status (2)

Country Link
EP (1) EP0014477A1 (fr)
AU (1) AU5528180A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2173388A (en) * 1985-04-11 1986-10-15 Japan Tobacco Inc Apparatus for manufacturing tobacco filter incorporating a granular additive
US4861324A (en) * 1985-04-11 1989-08-29 Japan Tobacco Inc. Apparatus for manufacturing tobacco filter
EP0482283A1 (fr) * 1990-10-24 1992-04-29 SANJO MACHINE WORKS, Ltd. Tige de filtre à cigarettes, procédé et appareil pour leur production
WO2009068196A3 (fr) * 2007-11-27 2010-03-18 Hauni Maschinenbau Aktiengesellschaft Dispositif permettant de traiter au moins deux boudins de filtre

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB741429A (en) * 1953-02-13 1955-12-07 Hedwig Gamble Improvements in or relating to tobacco smoke filters
UST880009I4 (en) * 1970-01-28 1970-11-24 Bmded cigarette xr t tow
GB1250170A (fr) * 1968-05-31 1971-10-20
US3910166A (en) * 1974-02-04 1975-10-07 Brown & Williamson Tobacco Method and apparatus for the manufacture of filter rods containing particulate material from a split web of filter material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB741429A (en) * 1953-02-13 1955-12-07 Hedwig Gamble Improvements in or relating to tobacco smoke filters
GB1250170A (fr) * 1968-05-31 1971-10-20
UST880009I4 (en) * 1970-01-28 1970-11-24 Bmded cigarette xr t tow
US3910166A (en) * 1974-02-04 1975-10-07 Brown & Williamson Tobacco Method and apparatus for the manufacture of filter rods containing particulate material from a split web of filter material

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2173388A (en) * 1985-04-11 1986-10-15 Japan Tobacco Inc Apparatus for manufacturing tobacco filter incorporating a granular additive
US4861324A (en) * 1985-04-11 1989-08-29 Japan Tobacco Inc. Apparatus for manufacturing tobacco filter
EP0482283A1 (fr) * 1990-10-24 1992-04-29 SANJO MACHINE WORKS, Ltd. Tige de filtre à cigarettes, procédé et appareil pour leur production
WO2009068196A3 (fr) * 2007-11-27 2010-03-18 Hauni Maschinenbau Aktiengesellschaft Dispositif permettant de traiter au moins deux boudins de filtre

Also Published As

Publication number Publication date
AU5528180A (en) 1980-08-21

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Effective date: 19820702

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Inventor name: BRINKER, REINER G.