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
  • A24D3/17—Filters specially adapted for simulated smoking devices
• • 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
  • A24D3/048—Tobacco smoke filters characterised by their shape or structure containing additives
• • 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
• • 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
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
  • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
  • A24D3/06—Use of materials for tobacco smoke filters
  • A24D3/16—Use of materials for tobacco smoke filters of inorganic materials
  • A24D3/163—Carbon

Definitions

• the present invention relates to filters for smoking articles.
• Filters commonly include adsorbent materials, such as activated carbon, to reduce certain components of the smoke during smoking.
• activated carbon in a filter can adversely affect the taste and/or flavour characteristics of a cigarette.
• the tobacco core extends substantially longitudinally between mutually opposing end faces of the plug of filter material.
• the tobacco core extends in a direction which is substantially parallel to a side face of the plug of filter material, which side face is preferably substantially perpendicular to one or both end faces.
• the tobacco core extends through an inner portion of, and is surrounded by, the filter material.
• the tobacco core extends through substantially the "centre of the plug of filter material.
• the tobacco core may form a tobacco rod of any cross-section.
• the tobacco core may form a tobacco rod of triangular or square cross-section.
• the tobacco core forms a tobacco rod of circular cross-section.
• the tobacco core may be substantially cylindrical in shape.
• the wrapping means may be in contact with substantially all of the longitudinally extending side surface of the tobacco core.
• the wrapping means circumscribes the tobacco.
• the wrapping means may not be disposed around at least one end face, and preferably each end face, of the tobacco core.
• a filter element for a smoking article comprising a plug of filter material, and a tobacco core extending substantially longitudinally through the plug of filter material, wherein the tobacco core comprises, or is derived from, a longitudinal section of a tobacco rod of a smoking article.
• the tobacco core in the filter element of the first or second aspect may be between 3mm and 8mm in diameter, preferably between 3mm and 7mm in diameter, more preferably between 3.5mm and 6.5mm in diameter, and most preferably between 4mm and 6mm in diameter.
• the tobacco core may be encased by filter material to form the filter element of the first or second aspect.
• the plug of filter material may comprise any suitable filter media, which will be known to the skilled technician.
• a preferred filter material comprises cellulose acetate.
• the diameter of the plug of filter material may be between 5mm and 15mm, preferably between 6mm and 12mm, more preferably between 7mm and 10mm, and most preferably between 7mm and 9mm.
• the ratio of the diameter of the plug of filter material to the diameter of the tobacco core is between 0.5:1 and 10:1, more preferably between 1:1 and 5:1, even more preferably between 1:1 and 3:1, and most preferably between 1.5:1 and 2:1.
• the filter element according to the first or second aspect may be used in the manufacture of a filter, for use in a smoking article.
• the filter of the third aspect may comprise a plurality of filter elements according to the first or second aspect, in which a tobacco core extends through a plug of filter material.
• the filter may comprise 2, 3, 4, 5 or more filter elements of the first or second aspect, in which adjacent filter elements may either be connected to each other, or which elements may be separated from each other by other filter elements (which may not be in accordance with the first or second aspect).
• the filter may comprise a plurality of filter elements, at least one of which is a filter element according to the first or second aspect of the invention.
• the filter of the third aspect may also comprise an adsorbent filter element, which element comprises an adsorbent material.
• the adsorbent filter element is provided to adsorb and, hence, reduce certain components of the smoke during smoking.
• the adsorbent filter element may comprise a plug of filter material in which the adsorbent material is dispersed.
• the filter material may be cellulose acetate.
• a preferred adsorbent material is activated carbon.
• the activated carbon may be in the form of granular activated carbon, which is preferably distributed substantially throughout the volume of the plug of filter material.
• the adsorbent filter element does not include a tobacco core.
• the section of smokeable material and the filter may be attached by tipping paper.
• a method of manufacturing a filter element for a smoking article comprising providing a tobacco core through a plug of filter material, wherein the tobacco core extends substantially longitudinally through the plug of filter material, and wherein wrapping means is wrapped around at least a portion of a longitudinally extending surface of the tobacco core.
• the methods of the fifth or sixth aspect preferably comprise a step of introducing the tobacco core into substantially the centre of the filter material.
• the methods may comprise using guide means to guide the tobacco core as a tow of filter material is formed therearound.
• the guide means may comprise a guide tube through which the tobacco core is entrained. As the core exits the guide means, it is preferably surrounded by filter material.
• Figure 1 shows a perspective view of a smoking article, including a rod of smokeable material, a filter in accordance with the invention, and tipping paper attaching the rod and filter together;
• Figure 2 shows a cross-sectional side view of a first embodiment of the filter according to the invention

Landscapes

• Chemical & Material Sciences (AREA)
• Inorganic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Cigarettes, Filters, And Manufacturing Of Filters (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=39930242

Family Applications (1)

Country Status (16)

Families Citing this family (10)

Family Cites Families (22)

• 2008
  • 2008-09-16 GB GBGB0816933.6A patent/GB0816933D0/en not_active Ceased
• 2009
  • 2009-09-10 CN CN2009801361339A patent/CN102159101A/zh active Pending
  • 2009-09-10 KR KR1020117008814A patent/KR20110063548A/ko not_active Application Discontinuation
  • 2009-09-10 MX MX2011001936A patent/MX2011001936A/es active IP Right Grant
  • 2009-09-10 WO PCT/GB2009/051160 patent/WO2010032033A1/en active Application Filing
  • 2009-09-10 EP EP09785615.7A patent/EP2352398B1/de active Active
  • 2009-09-10 US US13/119,404 patent/US20110232660A1/en not_active Abandoned
  • 2009-09-10 UA UAA201104459A patent/UA101219C2/ru unknown
  • 2009-09-10 JP JP2011526569A patent/JP2012502628A/ja active Pending
  • 2009-09-10 CA CA2735469A patent/CA2735469A1/en not_active Abandoned
  • 2009-09-10 AU AU2009294388A patent/AU2009294388A1/en not_active Abandoned
  • 2009-09-10 BR BRPI0917174A patent/BRPI0917174A2/pt not_active IP Right Cessation
  • 2009-09-10 RU RU2011115123/12A patent/RU2526014C2/ru active
  • 2009-09-15 CL CL2009001858A patent/CL2009001858A1/es unknown
  • 2009-09-16 AR ARP090103561A patent/AR076438A1/es not_active Application Discontinuation
• 2011
  • 2011-02-23 ZA ZA2011/01451A patent/ZA201101451B/en unknown
• 2014
  • 2014-03-04 JP JP2014001104U patent/JP3190703U/ja not_active Expired - Lifetime

Non-Patent Citations (1)

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