EP0107507A1 - Adjustable air dilution filter - Google Patents

Adjustable air dilution filter Download PDF

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Publication number
EP0107507A1
EP0107507A1 EP83306494A EP83306494A EP0107507A1 EP 0107507 A1 EP0107507 A1 EP 0107507A1 EP 83306494 A EP83306494 A EP 83306494A EP 83306494 A EP83306494 A EP 83306494A EP 0107507 A1 EP0107507 A1 EP 0107507A1
Authority
EP
European Patent Office
Prior art keywords
filter
band
inner band
zone
zones
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Withdrawn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
EP83306494A
Other languages
German (de)
English (en)
French (fr)
Inventor
Leslie Elmer Payne
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.)
RJ Reynolds Tobacco Co
Original Assignee
RJ Reynolds Tobacco Co
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 RJ Reynolds Tobacco Co filed Critical RJ Reynolds Tobacco Co
Publication of EP0107507A1 publication Critical patent/EP0107507A1/en
Withdrawn legal-status Critical Current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
    • A24D3/04—Tobacco smoke filters characterised by their shape or structure
    • A24D3/041—Tobacco smoke filters characterised by their shape or structure with adjustable means for modifying the degree of filtration of the filter
    • 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
    • A24D3/0275—Manufacture of tobacco smoke filters for filters with special features
    • 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
    • A24D1/00—Cigars; Cigarettes
    • A24D1/02—Cigars; Cigarettes with special covers
    • A24D1/027—Cigars; Cigarettes with special covers with ventilating means, e.g. perforations

Definitions

  • This invention relates to cigarette filters and more particularly to filters having means whereby the consumer may vary the particulate delivery of the mainstream smoke by varying the amount of air dilution.
  • a preferred but non-limiting embodiment of the present invention comprises a filter plug, axially abutting a smoking article, such as a cigarette tobacco rod.
  • the filter plug is overwrapped by a plurality of bands.
  • At least one first air dilution opening is formed in the surface of the filter plug, and at least one second air dilution opening is formed through one or more bands, in longitudinal alignment with the first opening.
  • An inner band overlies the filter plug and has several longitudinally spaced zones. Over the inner band lies an outer band, which has several longitudinally spaced areas.
  • One of the inner band zones is joined to the filter plug to form a first unit; one of the outer band areas is joined to an inner band zone to form a second unit.
  • Figures 1-3 depict an embodiment 10 of the present invention.
  • a tobacco rod 2 is axially abutted to a filter plug 4 to form a cigarette assembly.
  • the tobacco rod may be of any conventional length and circumference.
  • the filter plug comprises filter material, known in the art, and a wrapper 5. Rather than the normal, porous plug wrap, the wrapper is a low-shear-strength tipping paper, impermeable to air, likewise known in the art.
  • the filter plug may be of any suitable material known in the art, such as an extruded foam filler having an impervious outer skin.
  • the filter material and the tobacco blend may be chosen to deliver a desired particulate level, as discussed hereinafter.
  • An inner band 6 encircles the filter plug.
  • the forward edge of this inner band may extend to the line of abutment 7 between the filter and the tobacco rod.
  • Figure 2 depicts the inner band in a flat configuration, before being wrapped around the filter plug.
  • a circumferential parting slit 8 is formed in the inner band, preferably after the band is wrapped about the filter plug, defining a rotating zone 12, which lies between the slit and the tobacco rod, and a retaining zone 14, which extends rearward toward the filter mouthpiece.
  • Adhesive is applied to the underside of the rotating zone 12 to join the inner band to the filter plug.
  • the retaining zone is left free of adhesive.
  • Adhesive also may be applied between the longitudinal edges 20 and 20a of the inner band to insure a solid seam after wrapping.
  • the adhesive may be of any conventional type, such as hot-melt or polyvinyl acetate (PVA).
  • An outer band 22 encircles the cigarette assembly partially covering the inner band.
  • This band may be conventional tipping paper known in the art.
  • Adhesive is applied to the underside of the outer band, defining three longitudinally spaced areas, as best seen in Figure 3, which shows the outer band in a flat configuration.
  • An overlap area 24 corresponds to the portion of the outer band in contact with the tobacco rod; this area has adhesive applied thereto, joining it to the tobacco rod.
  • a locking area 26 extends rearward from the overlap area and overlies the inner band rotating zone 12. It has no adhesive applied thereto.
  • An attachment area 28 extends rearward from the locking area. It constitutes the portion of the outer band overlapping the inner band retaining zone 14, and it has adhesive applied to join it to that zone.
  • Adhesive also may be applied between edges 30 and 30a to form a complete seam when the outer band is wrapped around the cigarette assembly.
  • inner band rotating zone 12 is joined to filter plug 4 to form a first unit.
  • the inner band retaining zone 14 is joined to the outer band 22 to form a second unit, which is attached to the tobacco rod 2.
  • the filter plug thus is not attached to either the tobacco rod or the outer band, and thus is able to rotate freely.
  • the combined action of the second unit serves to hold the first unit in axial position.
  • the retaining zone extending rearward toward the mouthpiece of the filter, holds the second unit sufficiently firmly to prevent wobble.
  • first and second air dilution openings 32 and 32a are formed therein. These openings are formed by piercing apertures of selected shape through one or more bands and penetrating the filter plug 4.
  • Figure 1 shows the air dilution openings 32 and 32a located in the retaining zone of the inner band, not covered by the outer band. Based upon known techniques of achieving air dilution, this position could be adjusted forward, so that the openings are formed through the outer band, the inner band (in either the retaining or rotating zone) and the filter wrapper.
  • the openings can take the form of slits or perforations. It is preferred that the openings comprise three slits, spaced about the circumference of the filter plug at 120° intervals (Fig. 4). The length of the slits is chosen to provide the desired level of air dilution.
  • air dilution openings, filter material, and tobacco blend cooperate to produce a desired level of particulate delivery.
  • persons having ordinary skill in the art will appreciate how to balance these factors in order to achieve a cigarette of desired particulate delivery, combined with other smoke characteristics.
  • the completed cigarette may be adjusted by the consumer to vary the level of particulate delivery.
  • the cigarette As delivered to the consumer, the cigarette is in its lowest particulate delivery form, i.e., having maximum air dilution, because dilution opening 32 through the inner band 6 is circumferentially aligned with corresponding opening 32a through the filter plug wrapper 5, as shown in Figure 4.
  • the consumer To adjust air dilution, the consumer merely rotates the filter plug.
  • Figure 4a shows the cigarette after rotation of the filter, with openings 32 and 32a misaligned and air dilution reduced by about 50%. The amount of air dilution thus depends upon the degree to which the perforation slits are aligned.
  • An index line 34 or other indicia may be printed on the filter plug or inner band retaining zone to guide the consumer in selecting levels of particulate delivery.
  • this line longitudinally extends from a rotatable to a non-rotatable portion of the cigarette, so that alignment of the portions indicates alignment of the air dilution means.
  • a significant advantage of the present invention is its ease of manufacture.
  • filters are made in one section of a manufacturing operation and are joined to tobacco rods in an assembly operation. No change in this procedure need be implemented to assemble adjustable-filter cigarettes.
  • the filter can be made in its normal form, a rod sufficiently long so that four or six filter plugs will be formed therefrom when the rod is severed during assembly.
  • the only alterations required in the filter-making process are the substitution of a different filter plug wrap for the normal plug wrap, and the addition of one piece of equipment at the output end of the filter rod making machine.
  • This equipment wraps the required number of inner bands 6 around the filter rod.
  • the inner band material preferably receives slit 8 therein after being wrapped around the filter rod.
  • Application of adhesive to the rotating zone 12 and edge 20 occurs prior to wrapping.
  • the cigarette assembly operation proceeds entirely normally.
  • the primary difference between application of conventional tipping paper and the outer band is the manner in which adhesive is applied to the outer band to define the overlap area 24, void area 26, attachment area 28.
  • the precise dimensions of these areas are chosen based upon manufacturing tolerances in the application of adhesive, as will be apparent to those having skill in the art. It is preferable to utilize PVA adhesive rather than hot-melt for this component.
  • air dilution openings 32 are formed in the assembled cigarette, preferably utilizing a known on-line laser perforator. Dimension and location of the air dilution slits is controlled by regulating the pulse time and power output of the laser perforator.
  • FIG. 5 Another embodiment 110 of the present invention is shown in Figures 5-7.
  • the filter plug is overwrapped in this instance by inner band 106, which can be conventional tipping paper or other suitable material.
  • the inner band 106- is shown in flat configuration in Figure 6.
  • This inner band is separated by circumferential, longitudinally spaced parting slits 108 and 109 into three zones: a forward rotating zone 113 extending from the line of abutment 107 between the filter plug and the tobacco rod rearward to the forward parting slit 108, a rear rotating zone 112 extending from the rear parting slit 109 to the mouthpiece end of filter plug 104, and a retaining zone 114 lying beween the parting slits.
  • Adhesive is applied to the forward and rear rotating zones to join those portions of the inner band to the filter plug.
  • Adhesive also may .be applied between edges 120 and 120a of the retaining zone in order to form a complete seam when the inner band is wrapped about the filter plug.
  • Outer band 122 is wrapped around the cigarette assembly so that it overlaps both the tobacco rod and the filter plug, but does not completely cover the latter.
  • adhesive is applied to the outer band to define four areas (Fig.7).
  • overlap area 124 corresponds to that portion of the outer band in contact with the tobacco rod 102, and it is adhesively joined thereto.
  • a forward locking area 126 extends rearward from the overlap area for a distance equal to the width of the inner band forward rotating zone 113, which this area overlies. No adhesive is applied to this area.
  • Attachment area 128 extends rearwardly from the forward clamp area and corresponds to that portion of the outer band in contact with the inner band retaining zone 114.
  • Rear locking area 127 has adhesive applied to its underside joining it to the retaining zone.
  • Rear locking area 127 has no adhesive applied thereto, and it extends rearward overlying the inner band rear rotating zone 112 for a distance chosen to provide stability to the completed cigarette, as apparent to those in the art.
  • Adhesive also may be applied between edges 130 and 130a of the locking areas to insure a complete seam when the outer band is wrapped. Conventional adhesive may be used for attaching both the inner band and outer band, with PVA preferred.
  • the inner band rotating zones 112 and 113 are joined to the filter plug 104 to form a first unit.
  • Outer band 122 is joined to the inner band retaining zone 114 to form a second unit, which is attached to the tobacco rod 102. Because the first unit is not joined to the tobacco rod in any way, it is free to rotate. Yet, the action of the second unit serves to hold the first unit in axial position. Because the retaining zones prevent axial movement of the rotating zones, the first unit is held in axial position, and the portion of the outer band extending rearwardly in contact with the inner band rear rotating zone 112 prevents wobble.
  • Air dilution openings 132 and 132a are formed through the outer band and inner band respectively and penetrates the filter plug.
  • An index line 134, or other indicia, may be added to aid the consumer. The prior discussion concerning the position, dimensions, and number of air dilution means applies equally to this embodiment.
  • the consumer- receives the adjustable filter cigarette in its lowest particulate delivery configuration. Adjustment of the perceived mainstream smoke strength is accomplished by' rotating the filter, thus varying the amount of air dilution supplied by the air dilution means.
  • Inner bands 106 are attached to a multiple filter rod by an on-line adaptation of conventional filter manufacturing apparatus.
  • a further minor adaptation allows the parting slits 108 and 109 to be cut in the inner band.
  • the outer band 122 is applied.in the assembly operation in the same way that conventional tipping paper is now applied. Only minor modification of existing cigarette making apparatus is required to accomplish this result.
  • the air dilution openings 132 and 132a are formed utilizing conventional on-line perforating apparatus.
  • the cigarette assembly generally comprises a tobacco rod 202, having a conventional filler and wrapper, axially abutted to a filter 204.
  • the filter in this embodiment is manufactured having a conventional plug wrap (not shown).
  • the inner band 206 in this embodiment closely resembles conventional tipping paper, in that it is dimensioned to extend the length of the filter and overlap the tobacco rod.
  • Figure 9 shows the inner band 206 in flat configuration before wrapping. Adhesive is applied to the underside of the inner band before it is wrapped around the cigarette assembly, defining three zones: a forward retaining zone 215 is adhesively joined to the filter and overlaps the abutment 207 between the filter plug and tobacco rod, and extends rearward over the filter plug.
  • a rear retaining zone 214 also is adhesively joined to the filter, and is in contact with the rear portion of the filter plug.
  • Rotating zone 212 has no adhesive applied thereto, and overlies the filter plug between the two retaining zones.
  • Two circumferential parting slits 208 are formed in the rotating zone after the inner band is wrapped around the cigarette assembly. Each slit is located within the rotating zone adjacent the boundary between it and a retaining zone, spaced at a distance dictated by manufacturing tolerances. As envisioned, these slits are formed by apparatus such as an on-line laser perforator set for continuous operation, adjusted so that the depch of perforation penetrates but does not extend substantially into the filter plug. Adhesive may be added between edges 220 and 220a to insure a complete seam.
  • Outer band 222 is shown in flat configuration before wrapping in Figure 10. This band is wrapped around the cigarette assembly as shown in Figure 8. Before being wrapped, adhesive is applied to the underside of the outer band to define three areas: An attachment area 224 corresponds to the portion of the outer band in contact with the inner band rotating zone 212 and is adhesively joined thereto. Cover areas 226 have no adhesive applied thereto and lie on either side of adhesive area 224, in contact with the inner band retaining zones 214 and 215. Adhesive also may be applied between edges 230 and 230a of the cover areas in order to secure a complete seam when the outer band is wrapped around the cigarette assembly.
  • Air dilution openings 232 and 232a are formed through a cover area of the outer band and a retaining zone of the inner band, respectively, and penetrate the filter plug wrap.
  • An index line 234, or other indicia, may be added to aid the consumer. The previous discussion of the location, dimensions, and formation of. the air dilution openings applies equally here.
  • the inner band retaining zones -214 and 215, joined to filter plug 204, constitute a first unit, which is adhesively attached to the tobacco rod 202.
  • Outer band 222, joined to the inner band rotating zone 212 constitutes a second unit. Because the retaining zones prevent axial movement of the inner band rotating zone, the second unit is free to rotate, but is constrained from axial displacement. In contrast to other embodiments, here the filter plug remains stationary and the outer band rotates, allowing adjustment of the amount of air dilution supplied to the mainstream smoke.
  • the filter rod manufacturing process proceeds exactly as is done conventionally. After the filter plug and tobacco rod are brought into axial alignment on a cigarette making machine, the inner band is applied to the assembly exactly as is conventional tipping paper. The only modification of conventional manufacturing techniques comes in applying adhesive to the inner band, forming the parting slits, and wrapping the outer band around the assembly by techniques known in the art. Air dilution openings are formed in the third embodiment exactly as are on-line perforations at present.
  • FIG. 11 illustrates this technique as applied to the embodiment of Figures 1-3.
  • the slitting apparatus can be adjusted to form partial slits 11, leaving the inner band retaining zone 14 connected to the rotating zone 12 by a series of small bridges 13. This expedient prevents the angular rotation of the rotating zone during manufacture or shipment.
  • rotating the filter severs the bridges, allowing free rotation and adjustment. This technique is adaptable to all embodiments of the invention.
  • the means employed for joining the adjustable filter to the tobacco rod is an extension of one of the bands.
  • the embodiment shown in Figure 1 is joined to the tobacco. rod by the overlap area of the outer band.
  • the inner band 206 extends only as far forward as the end of the filter plug 204.
  • junction band is shown as not overlapping the outer band 222; this point is a matter of design preference, with the only requirement being that the rearward edge of the junction band must not cover the air dilution opening 232.
  • the advantage of this alternative is that it allows the adjustable filter to be assembled completely during the filter-making process. Filter cigarette assembly would be carried on exactly as is done conventionally. Application of the junction band 228 would proceed exactly as does application of conventional tipping paper, the only difference being the dimension of the band applied.

Landscapes

  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)
EP83306494A 1982-10-25 1983-10-25 Adjustable air dilution filter Withdrawn EP0107507A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US43621782A 1982-10-25 1982-10-25
US436217 1982-10-25

Publications (1)

Publication Number Publication Date
EP0107507A1 true EP0107507A1 (en) 1984-05-02

Family

ID=23731586

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83306494A Withdrawn EP0107507A1 (en) 1982-10-25 1983-10-25 Adjustable air dilution filter

Country Status (7)

Country Link
EP (1) EP0107507A1 (ko)
JP (1) JPS5998676A (ko)
KR (1) KR840006287A (ko)
AU (1) AU2015583A (ko)
BR (1) BR8305860A (ko)
ES (2) ES526708A0 (ko)
PT (1) PT77545B (ko)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4649941A (en) * 1985-12-16 1987-03-17 R. J. Reynolds Tobacco Company Adjustable air dilution cigarette exhibiting controlled pressure drop
US4649945A (en) * 1985-12-05 1987-03-17 R. J. Reynolds Tobacco Company Adjustable air dilution cigarette exhibiting controlled pressure drop
US4687008A (en) * 1986-04-17 1987-08-18 Philip Morris Incorporated Filter cigarette
US4716912A (en) * 1986-02-14 1988-01-05 R. J. Reynolds Tobacco Company Filter cigarette having adjustable air dilution
EP2777410A1 (en) * 2013-03-13 2014-09-17 JT International SA Filter cigarette with variable ventilation
EP2777409A1 (en) * 2013-03-13 2014-09-17 JT International SA Filter cigarette with variable ventilation
WO2014140216A1 (en) * 2013-03-13 2014-09-18 Jt International Sa Filter cigarette with variable ventilation
US9565874B2 (en) 2011-03-14 2017-02-14 British American Tobacco (Investments) Limited Smoking article and method of manufacturing a smoking article
EP3970518A4 (en) * 2020-07-23 2022-07-20 KT & G Coporation AEROSOL GENERATION ARTICLE, COOLING ASSEMBLY FOR AEROSOL GENERATION ARTICLE AND AIR QUANTITY ADJUSTING DEVICE

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201223183D0 (en) * 2012-12-21 2013-02-06 British American Tobacco Co A smoking article
GB201223179D0 (en) * 2012-12-21 2013-02-06 British American Tobacco Co A smoking article

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3359988A (en) * 1965-04-21 1967-12-26 Osborne M Thomson Filter cigarette
US3486508A (en) * 1967-02-08 1969-12-30 Walter Sipos Cigarette filter assembly
US3503406A (en) * 1968-10-28 1970-03-31 Lawrence Murry Riegel Cigarettes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3359988A (en) * 1965-04-21 1967-12-26 Osborne M Thomson Filter cigarette
US3486508A (en) * 1967-02-08 1969-12-30 Walter Sipos Cigarette filter assembly
US3503406A (en) * 1968-10-28 1970-03-31 Lawrence Murry Riegel Cigarettes

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4649945A (en) * 1985-12-05 1987-03-17 R. J. Reynolds Tobacco Company Adjustable air dilution cigarette exhibiting controlled pressure drop
US4649941A (en) * 1985-12-16 1987-03-17 R. J. Reynolds Tobacco Company Adjustable air dilution cigarette exhibiting controlled pressure drop
US4716912A (en) * 1986-02-14 1988-01-05 R. J. Reynolds Tobacco Company Filter cigarette having adjustable air dilution
US4687008A (en) * 1986-04-17 1987-08-18 Philip Morris Incorporated Filter cigarette
US9565874B2 (en) 2011-03-14 2017-02-14 British American Tobacco (Investments) Limited Smoking article and method of manufacturing a smoking article
EP2777410A1 (en) * 2013-03-13 2014-09-17 JT International SA Filter cigarette with variable ventilation
EP2777409A1 (en) * 2013-03-13 2014-09-17 JT International SA Filter cigarette with variable ventilation
WO2014140216A1 (en) * 2013-03-13 2014-09-18 Jt International Sa Filter cigarette with variable ventilation
EP3970518A4 (en) * 2020-07-23 2022-07-20 KT & G Coporation AEROSOL GENERATION ARTICLE, COOLING ASSEMBLY FOR AEROSOL GENERATION ARTICLE AND AIR QUANTITY ADJUSTING DEVICE

Also Published As

Publication number Publication date
ES530237A0 (es) 1984-11-01
ES8500024A1 (es) 1984-10-01
ES8500729A1 (es) 1984-11-01
PT77545A (en) 1983-11-01
KR840006287A (ko) 1984-11-29
BR8305860A (pt) 1984-05-29
PT77545B (en) 1986-05-20
JPS5998676A (ja) 1984-06-07
ES526708A0 (es) 1984-10-01
AU2015583A (en) 1984-05-03

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19840706

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Effective date: 19851203

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Inventor name: PAYNE, LESLIE ELMER