Occupying Plural, Separate, Distinct Zones Patents (Class 131/344)
  • Patent number: 10383359
    Abstract: Apparatuses are provided for manufacturing a rod member for a cigarette filter element. Each rod member defines a longitudinal axis and includes a generally longitudinally-extending filter material and a plurality of objects disposed therein along the longitudinal axis. Such an apparatus comprises a rod-forming unit configured to form a continuous supply of a filter material into a continuous cylindrical rod member. An object insertion unit is configured to introduce a plurality of objects into engagement with the rod member. A rod-dividing unit is configured to divide the rod member into a plurality of rod portions such that each rod portion includes a plurality of the objects. Associated methods are also provided.
    Type: Grant
    Filed: September 2, 2015
    Date of Patent: August 20, 2019
    Assignee: R.J. Reynolds Tobacco Company
    Inventors: Cynthia Stewart Stokes, John Larkin Nelson, Vernon Brent Barnes, Michael Francis Dube
  • Patent number: 10219540
    Abstract: A filter for a smoking article comprises a mouth end filter segment and a rod end filter segment. The rod end filter segment has a passage extending longitudinally therethrough. The passage has a diameter of about 1.0 mm or greater. In one embodiment, the rod end filter segment is comprised of an infinite pressure drop material. In another embodiment, the rod end filter segment is comprised of a low pressure drop material having a hollow tubular element disposed within to define the passage with an inner diameter greater than about 1.55 mm. Air dilution means are disposed in one of said filter segments to admit ventilating air into the filter.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: March 5, 2019
    Assignee: LORILLARD TOBACCO COMPANY
    Inventors: Steven E. Brown, Luis A. Sanchez, Kai Tang, Suzanne F. Roof
  • Patent number: 9907336
    Abstract: A porous carbon material suitable for incorporation in smoke filters for cigarettes has a BET surface area of at least 800 m2/g and a pore structure that includes mesopores and micropores. The pore volume (as measured by nitrogen adsorption) is at least 0.9 cm3/g and from 15 to 65% of the pore volume is in mesopores. The pore structure of the material provides a bulk density generally less than 0.5 g/cc. The material may be produced by carbonizing and activating organic resins and may be in the form of beads for ease of handling.
    Type: Grant
    Filed: March 27, 2006
    Date of Patent: March 6, 2018
    Assignee: BRITISH AMERICAN TOBACCO (INVESTMENTS) LIMITED
    Inventors: Maria Cashmore, Peter Rex White, Oleksandr Kozynchenko, Andrew Blackburn, Stephen Robert Tennison
  • Patent number: 8997755
    Abstract: The invention provides a filter element of a smoking article having a longitudinal axis and adapted for filtration of mainstream smoke generated by the smoking article, the filter element including a first region extending along the longitudinal axis of the filter element and exhibiting a first pressure drop and a second region extending along the longitudinal axis of the filter element and exhibiting a second pressure drop lower than said first pressure drop, wherein the first and second regions are arranged in a side-by-side configuration such that both regions are visible in a cross-section of the filter element perpendicular to the longitudinal axis, and wherein mainstream smoke can move from the second region into the first region, and further comprising a smoke-altering material, such as an oxidation catalyst, positioned in the first region.
    Type: Grant
    Filed: November 11, 2009
    Date of Patent: April 7, 2015
    Assignee: R.J. Reynolds Tobacco Company
    Inventors: Alan Benson Norman, Bradley James Ingebrethsen
  • Patent number: 8905042
    Abstract: Filters and cigarettes include an activated carbon sorbent capable of selectively removing nitric oxide from mainstream tobacco smoke. Methods for making cigarette filters and cigarettes using the activated carbon sorbent and methods for treating mainstream tobacco smoke produced by smoking a cigarette comprising the sorbent are also provided.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: December 9, 2014
    Assignee: Philip Morris USA Inc.
    Inventors: Wei-Jun Zhang, Mark Zhuang, Shahryar Rabiei, Firooz Rasouli
  • Patent number: 8826916
    Abstract: A filter for smoking includes a filter medium, and a means for heating the filter medium or a periphery of the filter medium.
    Type: Grant
    Filed: March 3, 2005
    Date of Patent: September 9, 2014
    Assignee: Japan Tobacco Inc.
    Inventors: Michihiro Inagaki, Takashi Hasegawa, Kazunori Sugai
  • Publication number: 20140020699
    Abstract: A smoking article comprising at least two of: (a) a tobacco blend comprising one or more tobaccos or tobacco grades with low TSNA and/or metal content; (b) a tobacco blend that has been treated to remove polyphenols and/or peptides; (c) a tobacco substitute sheet comprising a non-combustible inorganic filler, a binder and an aerosol generating means; (d) a high activity carbon comprising a polymer-derived carbon material; and (e) an amine-functionalised chelating resin.
    Type: Application
    Filed: February 16, 2012
    Publication date: January 23, 2014
    Applicant: BRITISH AMERICAN TOBACCO (INVESTMENTS) LIMITED
    Inventors: David John Dittrich, Peter James Branton, Michael Arthur John Bevan
  • Patent number: 8616219
    Abstract: A filter (3) for a smoking article (1) comprises one or more segments (4a, 4b, 4c) of filtration media and a substantially transparent wrapper (5). The one or more filter segments (4a, 4b, 4c) and the wrapper (5) define a recess or cavity in the filter (3). An anchoring adhesive (7) is provided to secure the one or more filter segments (4a, 4b, 4c) to the wrapper (5). The anchoring adhesive (7) is disposed exclusively between the wrapper (5) and portions of the one or more filter segments (4a, 4b, 4c) other than those corresponding to the recess or cavity.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: December 31, 2013
    Assignee: British American Tobacco (Investments) Limited
    Inventors: John Richardson, Joseph Peter Sutton
  • Publication number: 20130306085
    Abstract: A method and article are provided for controlling an inner filter temperature of an aerosol-generating product or device to alter the aerosol taste characteristics. The method comprises selecting a heat adsorbing or reflecting material to apply to a filter of a smoking article, the heat adsorbing or reflecting material having one or more properties associated therewith; and applying the heat adsorbing or reflecting material to the filter, the at least one heat adsorbing or reflecting materials being configured to control the inner temperature of the filter.
    Type: Application
    Filed: May 15, 2013
    Publication date: November 21, 2013
    Applicant: LOEC, Inc.
    Inventors: Luis A. Sanchez, Steven E. Brown, Kai Tang
  • Patent number: 8573230
    Abstract: A smoking article having a cylindrical tube of smokable material having an outer wrapper, a concentric rod of smokable material coaxially positioned within the cylindrical tube of a smokable material, and an inner wrapper separating the cylindrical tube and the concentric rod. A filter attaches to the tobacco rod with an annular film positioned between the filter and the tobacco rod. The annular film increases the resistance-to-draw of the cylindrical tube during smoking.
    Type: Grant
    Filed: December 11, 2006
    Date of Patent: November 5, 2013
    Assignee: Philip Morris USA Inc.
    Inventors: Shuzhong Zhuang, Georgios D. Karles, Raquel M. Olegario
  • Patent number: 8550092
    Abstract: A filter for a cigarette comprises a porous filter rod (3) a material sheet (2) wrapped around the filter rod and a cellulose acetate thread (4) formed from substantially uncrimped cellulose acetate filaments. The cellulose acetate thread is positioned within the filter rod and extends along the central axis of the filter rod.
    Type: Grant
    Filed: June 27, 2008
    Date of Patent: October 8, 2013
    Assignee: British American Tobacco (Investments) Limited
    Inventors: John Roger Sampson, David Lewis
  • Patent number: 8539957
    Abstract: Filters and cigarettes include an activated carbon sorbent capable of selectively removing nitric oxide from mainstream tobacco smoke. Methods for making cigarette filters and cigarettes using the activated carbon sorbent and methods for treating mainstream tobacco smoke produced by smoking a cigarette comprising the sorbent are also provided.
    Type: Grant
    Filed: December 19, 2005
    Date of Patent: September 24, 2013
    Assignee: Philip Morris USA Inc.
    Inventors: Wei-Jun Zhang, Mark Zhuang, Shahryar Rabiei, Firooz Rasouli
  • Publication number: 20130199551
    Abstract: A smoking article (10) comprising a first part (13) configured to be movable relative to a second part (11) of the smoking article. The first part (13) having a first engaging surface (31). The second part (11) having a second engaging surface (32), the second engaging surface engagable with the first engaging surface (31) to limit relative longitudinal movement between the first and second parts. The first engaging surface (31) and/or second engaging surface (32) is preferably formed on a folded over portion of sheet material.
    Type: Application
    Filed: March 14, 2011
    Publication date: August 8, 2013
    Applicants: BRITISH AMERICAN TOBACCO (INVESTMENTS) LIMITED, Tobacco Research and Development Institute (Proprietary) Limited, BRITISH AMERICAN TOBACCO JAPAN, LTD.
    Inventors: Gerhard Le Roux, Karl Kaljura, Mark Austin, Gary Fallon, John Richardson, Kevin Blick, Mike Simpson
  • Patent number: 8496012
    Abstract: A method of making composite nanoscale particles comprising subjecting a starting material to laser energy so as to form a vapor and condensing the vapor so as to form the composite nanoscale particles, wherein said composite nanoscale particles comprise a first metal and/or a first metal oxide incorporated in nanoscale particles of an oxide of a second metal, the first metal being different than the second metal. The starting material can comprise first and second metals or compounds of the first and second metals. The composite nanoscale particles can be formed in a reaction chamber wherein a temperature gradient is provided. The atmosphere in the chamber can be an inert atmosphere comprising argon or a reactive atmosphere comprising oxygen. The composite nanoscale particles are useful for low-temperature and near-ambient temperature catalysis.
    Type: Grant
    Filed: July 18, 2011
    Date of Patent: July 30, 2013
    Assignee: Philip Morris USA Inc.
    Inventors: Sarojini Deevi, Rangaraj S. Sundar, Yezdi B. Pithawalla
  • Publication number: 20130180536
    Abstract: A filter material adapted for use as a filter element of a smoking article is provided, the filter material including at least one segment of fibrous tow having a plurality of degradable particles dispersed therein, the degradable particles comprising a starch material. Exemplary starch materials include naturally-occurring starch, hydroxyalkylated starch, starch esters, ionically modified starch, oxidized starch, hydrolyzed starch, plasticized starch, gelatinized starch, grafted starch, crosslinked starch, transglycosylated starch, starch ethers, and mixtures thereof, as well as blends of starch with other polymers. Filter elements and smoking articles, such as cigarettes, that contain the filter material are also provided. A method of preparing polymer fibers for use in filter elements is also provided, the method including adding the starch material to a fiber precursor solution prior to fiber extrusion or dry-blending the starch material with the polymer material to be formed into fibers.
    Type: Application
    Filed: March 6, 2013
    Publication date: July 18, 2013
    Applicant: R. J. REYNOLDS TOBACCO COMPANY
    Inventor: R.J. Reynolds Tobacco Company
  • Patent number: 8459272
    Abstract: Improved delivery of additive materials to cigarettes is provided through the use of one or more capsules containing additive materials, such as flavor components, in the filter section of a cigarette. The capsule or capsules are provided between first and second absorbent members and the capsules are subjected to an external force, such as squeezing, by a smoker prior to or during smoking of the cigarette in order to release at least a portion of the additive material and expose the additive material to mainstream smoke passing through the filter. The capsules provide a barrier between the additive materials and other cigarettes components, such as sorbents or filter materials, in order to reduce additive material migration into the other cigarette components prior to desired use. An outer cover which is impermeable to the fluid within the capsules is provided about the capsule or capsules and the first and second absorbent members.
    Type: Grant
    Filed: January 10, 2011
    Date of Patent: June 11, 2013
    Assignee: Philip Morris USA Inc.
    Inventors: Georgios D. Karles, Jeffrey Allen, Jose Nepomuceno
  • Publication number: 20130112214
    Abstract: A method for forming a filter rod may include providing a bale of crimped tow band having about 10 denier per filament or greater and about 20,000 total denier or less, the crimped tow band comprising a plurality of cellulose acetate filaments; and placing the crimped tow band in an apparatus so as to form a filter rod.
    Type: Application
    Filed: November 3, 2011
    Publication date: May 9, 2013
    Applicant: Celanese Acetate LLC
    Inventors: Christopher M. Bundren, William S. Sanderson, Paul Busby, Edward J. Clark
  • Patent number: 8424540
    Abstract: A smoking article filter includes a valved flow restrictor and a cavity downstream of the flow restrictor. The flow restrictor includes an orifice or flow channel for directing smoke into the cavity. The filter is attached to the tobacco rod with tipping paper and includes an air-admissible ventilating zone at a location downstream of the restrictor. The valved restrictor can be used to isolate a sorbent bearing component of the filter from a flavor bearing component.
    Type: Grant
    Filed: October 9, 2009
    Date of Patent: April 23, 2013
    Assignee: Philip Morris USA Inc.
    Inventors: Raquel Olegario, San Li, Roland W. Dwyer, Mike Braunshteyn
  • Patent number: 8393333
    Abstract: Immobilized diluents in a smoking article are provided, wherein diluents can be immobilized through absorption and/or adsorption of the diluents into immobilizing materials, such as sorbents like silica gels. By immobilizing diluents, the diluents can be available for vaporization, while still being protected from migration and/or loss of the diluents in a smoking article.
    Type: Grant
    Filed: June 14, 2007
    Date of Patent: March 12, 2013
    Assignee: Philip Morris USA Inc.
    Inventors: Shuzhong Zhuang, Georgios D. Karles
  • Patent number: 8375959
    Abstract: The invention relates to a smoking article incorporating a smoking material comprising three main components, namely a non-combustible inorganic filler, an alginic binder and aerosol generating means. The smoking material is combined with tobacco material, which may be treated with additional humectant, to provide a smoking article that has an aerosol transfer efficiency ratio of greater than 4.0.
    Type: Grant
    Filed: April 2, 2003
    Date of Patent: February 19, 2013
    Assignee: British American Tobacco (Investments) Limited
    Inventors: David John Dittrich, Joseph Peter Sutton, Steven Coburn, James N Figlar
  • Publication number: 20120305014
    Abstract: A filter (3) for a smoking article (1) comprises one or more segments (4a, 4b, 4c) of filtration media and a substantially transparent wrapper (5). The one or more filter segments (4a, 4b, 4c) and the wrapper (5) define a recess or cavity in the filter (3). An anchoring adhesive (7) is provided to secure the one or more filter segments (4a, 4b, 4c) to the wrapper (5). The anchoring adhesive (7) is disposed exclusively between the wrapper (5) and portions of the one or more filter segments (4a, 4b, 4c) other than those corresponding to the recess or cavity.
    Type: Application
    Filed: November 19, 2010
    Publication date: December 6, 2012
    Applicant: BRITISH AMERICAN TOBACCO (INVESTMENTS) LIMITED
    Inventors: John Richardson, Joseph Peter Sutton
  • Publication number: 20120272978
    Abstract: A device designed to create a smoking area wherever the smoker is located. Furthermore, dramatically reducing or eliminating secondhand smoke exposure to people and the environment by giving smokers the option not to expose their surrounding by utilizing this invention. The three major components of the invention consist of (1) two types of handheld units which are known as horizontal handheld unit and vertical handheld unit. (2) The flexible tube that connects the other two components completing the suction system. And (3) the smoke elimination unit which contains the motor and fan. All three components together create one invention known as the smoking area.
    Type: Application
    Filed: April 28, 2011
    Publication date: November 1, 2012
    Inventor: Marvin Terrell Wheeler
  • Publication number: 20120260928
    Abstract: A fluid release mechanism for a smoking article comprises two longitudinally arranged parts (2,3), rotatable relative to one another from a first to a second position, a space to receive a fluid- containing member (4,5) and a contacting member (6,7) for contacting the fluid containing member in the second position, wherein the contacting member is arranged so that rotating from the first position to the second position causes relative angular movement between the contacting member and said space which causes the contacting member to enter the space for contacting and rupturing the fluid- containing member, thereby to release fluid.
    Type: Application
    Filed: December 13, 2010
    Publication date: October 18, 2012
    Applicant: TOBACCO RESEARCH AND DEVELOPMENT INSTITUTE (PROPRIETARY) LIMITED
    Inventor: Arnold Leslie Herholdt
  • Publication number: 20120255569
    Abstract: The invention provides a cigarette with a filter element comprising at least one longitudinally extending section of filter material. The section of filter material comprises a smoke-altering material therein that is useful for removing a quantity of vapor phase chemicals from the mainstream smoke. The section of filter material further comprises one or more tubes inserted into and extending through section of filter material. The one or more tubes each define a channel adapted for passage of mainstream smoke through the section of filter material while substantially avoiding contact of the portion of mainstream smoke therein with the smoke-altering material. The provision of a portion of mainstream smoke substantially unaltered by the smoke-altering material can be useful to retain certain desirable taste and other sensory properties of the mainstream smoke.
    Type: Application
    Filed: April 8, 2011
    Publication date: October 11, 2012
    Inventors: Kenneth Allen Beard, Leigh Ann Blevins Joyce, Stephen Benson Sears, Steven Lee Alderman, Timothy Brian Nestor
  • Patent number: 8240315
    Abstract: A smoking article, which provides lower amounts of total particulate matter in a latter portion of its puff count, includes a cylinder of smoking material, a combustible hollow tube within the cylinder of smoking material, and a heat sink at a downstream end of the hollow tube. The smoking article also includes a filter system attached to the cylinder of smoking material having a sorbent material and at least one downstream segment of filtering material.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: August 14, 2012
    Assignee: Philip Morris USA Inc.
    Inventors: Raquel M. Olegario, Mike Braunshteyn, Gail Yoss, Jim Lyons-Hart
  • Patent number: 8235057
    Abstract: A smoking article includes a tobacco rod adapted to produce mainstream smoke, and a filter having an upstream end and a downstream end, wherein the filter is arranged to receive mainstream smoke at the upstream end. The filter includes a tubular segment open at the downstream end thereof and a flow restrictor contained within the tubular segment. The filter is attached to the tobacco rod with tipping paper and includes an air-admissible ventilating zone at a location between the upstream end and the downstream end of the filter.
    Type: Grant
    Filed: March 7, 2008
    Date of Patent: August 7, 2012
    Assignee: Philip Morris USA Inc.
    Inventors: San Li, Michael S. Braunshteyn, Raquel M. Olegario, Richard Jupe, Martin Garthaffner
  • Publication number: 20120080044
    Abstract: According to at least one exemplary embodiment, a smoking article filter formed from cellulose acetate and including a wrapper is disclosed. The smoking article filter can include at least one chemical composition adapted to react with and decompose the cellulose acetate, contained within at least one carrier disposed within the smoking article filter.
    Type: Application
    Filed: September 30, 2010
    Publication date: April 5, 2012
    Applicant: Aiger Group AG
    Inventors: Yanko Yanchev, Dimitar Yanchev
  • Publication number: 20120048286
    Abstract: A smoking article having a tobacco rod, which is adapted to produce mainstream smoke, and a filter attached to said tobacco rod. A permeable wrapping paper circumscribes the tobacco rod and the filter. The filter has an upstream end portion and a downstream end portion, and includes a flow restricting segment of smoke impermeable material, which includes at least one open flow passage therethrough to deliver mainstream smoke, and a cavity downstream of the flow restricting segment. The smoking article also includes at least one ventilation zone upstream of the flow restricting segment.
    Type: Application
    Filed: March 25, 2011
    Publication date: March 1, 2012
    Applicant: Philip Morris USA Inc.
    Inventors: Zhaohua Luan, Mohammad R. Hajaligol, Randall E. Baren, Darin S. Colassaco, Firooz Rasouli
  • Patent number: 8079369
    Abstract: An apparatus and associated method for forming a filter rod member of a smoking article, such as a cigarette, is provided. The apparatus comprises a rod-forming unit configured to form a continuous supply of a filter material into a continuous cylindrical rod member. An insertion unit is configured to insert an adsorbent material carried by a carrier material into the rod member. The method comprises forming a continuous supply of a filter material into a continuous cylindrical rod member, and inserting an adsorbent material carried by a carrier material into the rod member such that the adsorbent material is disposed within the rod member.
    Type: Grant
    Filed: May 21, 2008
    Date of Patent: December 20, 2011
    Assignee: R.J. Reynolds Tobacco Company
    Inventors: Norman Philip Andresen, Michael Francis Dube, Barbara Walker Arzonico
  • Patent number: 8066011
    Abstract: A filter element incorporating an adsorbent material is provided. The filter element may comprise a first section of filter material and a second section of filter material spaced apart to form a compartment therebetween. The compartment may be filled with one or more adsorbents or the compartment may be divided into two regions, wherein one compartment region is filled with an adsorbent and the other compartment region is either filled with an ion-exchange resin or remains empty. The section of filter material adjacent to the tobacco rod may include one or more channels therethrough for passaging smoke directly from the tobacco rod into the adsorbent-filled compartment. The mouth end section of filter material may contain a breakable capsule, wherein the breakable capsule is filled with a flavoring agent capable of altering the taste characteristics of mainstream smoke.
    Type: Grant
    Filed: September 30, 2003
    Date of Patent: November 29, 2011
    Assignee: R. J. Reynolds Tobacco Company
    Inventors: Melissa Ann Clark, Sharon Pitts Dunlap, Chandra Kumar Banerjee
  • Patent number: 8047977
    Abstract: The invention relates to a filter (10) for tobacco products with a first terminal filter element (12), a second terminal filter element (14), a middle filter element (16) which is located between first and second terminal filter element and contains a granular filter material, and a casing (20), one part of one of the terminal filter elements (12) being displaceable vis-à-vis the casing (20). The invention furthermore relates to smoking articles with such filters, filter strands with two or more of the filters, and processes and devices for the production of such filters and tobacco products.
    Type: Grant
    Filed: December 10, 2002
    Date of Patent: November 1, 2011
    Assignee: Philip Morris USA Inc.
    Inventors: Michael Lauenstein, Dante M. Boido, Reynald M. Aeschlimann
  • Publication number: 20110232661
    Abstract: A smoking article (1) in which a patch of web material (7) such as paper containing an adsorbent material therein, such as activated carbon, is positioned towards the mouth end of the smoking article (1) to achieve a flatter puff profile compared to a conventional cigarette by decreasing the smoke constituents in the final few puffs. Characteristics of the smoking articles may be changed to increase the delivery of smoke constituents in the first few puffs in order to maintain a constant ISO NFDPM yield. The adsorbent-containing paper extends over only a portion of the smoking article towards the mouth end and does not comprise a flavourant therein.
    Type: Application
    Filed: June 3, 2011
    Publication date: September 29, 2011
    Inventor: Richard Thomas Fiebelkorn
  • Patent number: 7997282
    Abstract: A smoking article such as a cigarette comprises a tobacco rod and a filter component having a cavity filled with spherical beaded carbon. As mainstream tobacco smoke is drawn through the filter component, targeted gas phase smoke constituents are removed as the smoke passes through the carbon. During the filter manufacturing process the spherical beaded carbon flows like a liquid and substantially completely fills the cavity. Point-to-point contact between the spherical beads together with substantially complete filling of the cavity produces minimal channeling of ambulatory gas phase as well as maximum contact between the gas phase and the carbon surface of the spherical beads during smoking.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: August 16, 2011
    Assignee: Philip Morris USA Inc.
    Inventors: John B. Paine, III, Zuyin Yang, Kent B. Koller, Jay A. Fournier, Charles E. Thomas, Jr., Timothy S. Sherwood, Zhaohua Luan, Shuzhong Zhuang, Jose G. Nepomuceno, Diane L. Gee, Georgios D. Karles
  • Publication number: 20110186063
    Abstract: The present invention relates to smoking articles incorporating an improved filter in which the amount of smoke filtration varies with increased strength of draw. In particular, the filter comprises a plurality of passageways, at least one primary passageway I comprising a section of material which extends from the rod of smokable material to the mouth end of the smoking article and which has a high capacity to filter smoke and a high capacity to resist the passage of smoke. Via a series of small holes in an otherwise non-porous interface between the different passageways, smoke may be drawn between the primary passageway I and one or more secondary passageways II which have a low capacity to filter and resist the passage of smoke. At lower strengths of draw, smoke may become drawn through the small holes between the primary and secondary passageways.
    Type: Application
    Filed: July 23, 2009
    Publication date: August 4, 2011
    Inventor: Richard Fiebelkorn
  • Patent number: 7987856
    Abstract: A smoking article having a tobacco rod of a smokable material and a filter system attached to the tobacco rod of smokable material. The filter system includes a first filter portion and a second filter portion, the second filter portion concentrically positioned with respect to the first filter portion and having a lower resistance to draw than the first filter portion during an initial puff on the smoking article. The second filter portion closes upon contact with the mainstream smoke of the initial puff, such that after the initial puff, the first filter portion has the lower resistance to draw.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: August 2, 2011
    Assignee: Philip Morris USA Inc.
    Inventors: Shalva Gedevanishvili, Mohammad R. Hajaligol
  • Patent number: 7987857
    Abstract: A multi-component filter for a smoking article comprises: a mouth end segment; a first flavor release segment comprising plant leaf upstream of the mouth end segment; and a second flavor release segment comprising filtration material and a flavorant upstream of the first flavor release segment. The resistance to draw of the second flavor release segment is greater than the resistance to draw of the first flavor release segment and the resistance to draw of the second flavor release segment is greater than the resistance to draw of the mouth end segment. The multi-component filter preferably further comprises a rod end segment comprising filtration material upstream of the second flavor release segment, which has a lower resistance to draw than the second flavor release segment.
    Type: Grant
    Filed: March 3, 2010
    Date of Patent: August 2, 2011
    Assignee: Philip Morris USA Inc.
    Inventors: Hugues Seitert, Ahmed Gawad, Levent Lekili, Charles Kuersteiner
  • Publication number: 20110180088
    Abstract: The present invention relates to plug wrap or tipping paper (5) for smoking articles (1). More particularly, the present invention relates to plug wrap or tipping paper for smoking articles, wherein the plug wrap and tipping paper comprises a sheet having two or more plies (10,11) and one of the plies comprises adsorbent material. The present invention also relates to a method of preparing the plug wrap and tipping paper, and smoking articles comprising the plug wrap and/or tipping paper.
    Type: Application
    Filed: January 29, 2009
    Publication date: July 28, 2011
    Applicant: British American Tobacco (Investments) Limited
    Inventors: Nicole Hooper, Gordon Grierson
  • Publication number: 20110168195
    Abstract: A filter element (214) for a smoking article comprising a plug of filter material (210) having a longitudinally extending surface (213), a wrapper (220) wrapped around the longitudinally extending surface of the plug of filter material and a tobacco product (240) located between the longitudinally extending surface of the plug of filter material and the wrapper so as to cover at least a part of the longitudinally extending surface.
    Type: Application
    Filed: June 9, 2009
    Publication date: July 14, 2011
    Inventor: Paulo Oliveira
  • Publication number: 20110155156
    Abstract: The present invention related to wrappers (4) for smoking material rods. More particularly, the present invention relates to wrappers for smoking material rods, wherein the wrappers comprise a single sheet having two or more plies (10, 11) and one of the plies contains adsorbent material and flavourant. The present invention also relates to a method of preparing the wrapper/and to smoking articles (1) comprising the wrapper.
    Type: Application
    Filed: January 28, 2009
    Publication date: June 30, 2011
    Inventors: Nicole Hooper, Gordon Grierson
  • Patent number: 7918232
    Abstract: A process for the on line production of cigarette filters comprises the steps of conveying a continuous thin flexible substrate past a source of smoke altering particulate material, such as adsorbents, catalysts and flavorants. An electrostatic charge is applied onto the substrate upstream of the source of particulate material. A layer of particulate material from the source is deposited onto the substrate with the thickness of the layer depending upon the strength of the electrostatic charge. The coated substrate is then cut into pieces, and the pieces are placed into the cavities between spaced apart filter components. In an alternative process, filter paper is coated with smoke altering particulate material by electrostatic deposition techniques, and spaced apart filter components are placed onto the particulate coated filter paper which is then folded around the filter components.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: April 5, 2011
    Assignee: Philip Morris USA Inc.
    Inventors: Georgios D. Karles, Henry M. Dante, Xuan M. Pham, Barry S. Smith
  • Publication number: 20110023896
    Abstract: A filtered cigarette possesses at least one breakable capsule in its filter element. The filter element can possess a central cavity extending from the cigarette tobacco rod towards the middle of the filter element. The central cavity may be defined by an inner filter portion. The inner filter portion can be surrounded by an outer filter portion comprised of filter tow material that is generally permeable to the smoke generated by the cigarette. At least one breakable capsule is disposed in the central cavity of the filter element. The breakable capsules are spherical in shape, and are composed of a gelatin outer shell that encloses a payload of triglycerides and flavoring agents. The breakable capsules are adapted to rupture in response to pressure applied by the smoker to the outside region of the filter element.
    Type: Application
    Filed: October 12, 2010
    Publication date: February 3, 2011
    Inventors: Michael Francis Dube, Kenneth Wayne Smith, Vernon Brent Barnes
  • Patent number: 7866324
    Abstract: A cigarette having a multi-component filter wherein an upstream sorbent removes at least one constituent from mainstream tobacco smoke passing through the filter and a downstream flavor segment compensates for taste lost to the sorbent. The flavor component includes cellulosic flavor bearing granules which release volatile flavor constituents into the mainstream smoke under ambient conditions. The cellulosic granules include microcrystalline cellulose or other cellulosic material which can be formed into a paste with the flavor additive, extruded and spheronized to form the flavor granules.
    Type: Grant
    Filed: February 3, 2006
    Date of Patent: January 11, 2011
    Assignee: Philip Morris USA Inc.
    Inventors: Richard Jupe, Rowland W. Dwyer, Donald E. Laslie, Arlington L. Finley, Barbara G. Taylor, Cecil M. Smith, Vivian E. Willis
  • Patent number: 7856991
    Abstract: A filter cigarette comprising a tobacco rod which is circumscribed by a cigarette paper and a filter, said filter comprising a tobacco-side filter element and a mouth-side filter element, said filter cigarette having a diameter of about 4 mm to about 7 mm, yielding a smoke yield of 1 mg condensate or less and yielding a nicotine yield of 0.2 mg or less. The filter cigarette is characterized in that the overall length of the filter is about 25 mm to about 40 mm, the length of the tobacco-side filter element is about 10 mm to about 25 mm and the tobacco-side filter element comprises a ventilation zone.
    Type: Grant
    Filed: January 27, 2006
    Date of Patent: December 28, 2010
    Assignee: Philip Morris USA Inc.
    Inventor: Thomas Badertscher
  • Patent number: 7856990
    Abstract: A filter element incorporating an adsorbent material is provided. The filter element may comprise a first section of filter material and a second section of filter material spaced apart to form a compartment therebetween. The compartment may be filled with one or more adsorbents or the compartment may be divided into two regions, wherein one compartment region is filled with an adsorbent and the other compartment region is either filled with an ion-exchange resin or remains empty. The section of filter material adjacent to the tobacco rod may include one or more channels therethrough for passaging smoke directly from the tobacco rod into the adsorbent-filled compartment. The mouth end section of filter material may contain a breakable capsule, wherein the breakable capsule is filled with a flavoring agent capable of altering the taste characteristics of mainstream smoke.
    Type: Grant
    Filed: September 30, 2003
    Date of Patent: December 28, 2010
    Assignee: R. J. Reynolds Tobacco Company
    Inventors: Evon Llewellyn Crooks, Sheila Lynnette Cash, Joanne Naomi Taylor
  • Patent number: 7784471
    Abstract: A smoking article such as a cigarette comprises a tobacco rod and a filter component having a cavity filled with spherical beaded carbon. As mainstream tobacco smoke is drawn through the filter component, targeted gas phase smoke constituents are removed as the smoke passes through the carbon. During the filter manufacturing process the spherical beaded carbon flows like a liquid and substantially completely fills the cavity. Point-to-point contact between the spherical beads together with substantially complete filling of the cavity produces minimal channeling of ambulatory gas phase as well as maximum contact between the gas phase and the carbon surface of the spherical beads during smoking.
    Type: Grant
    Filed: April 11, 2006
    Date of Patent: August 31, 2010
    Assignee: Philip Morris USA Inc.
    Inventors: John B. Paine, III, Zuyin Yang, Kent B. Koller, Jay A. Fournier, Charles E. Thomas, Jr., Timothy S. Sherwood, Zhaohua Luan, Shuzhong Zhuang, Jose G. Nepomuceno, Diane L. Gee, Georgios D. Karles
  • Patent number: 7784470
    Abstract: A smoking article such as a cigarette comprises a tobacco rod and a filter component having a cavity filled with spherical beaded carbon. As mainstream tobacco smoke is drawn through the filter component, targeted gas phase smoke constituents are removed as the smoke passes through the carbon. During the filter manufacturing process the spherical beaded carbon flows like a liquid and substantially completely fills the cavity. Point-to-point contact between the spherical beads together with substantially complete filling of the cavity produces minimal channeling of ambulatory gas phase as well as maximum contact between the gas phase and the carbon surface of the spherical beads during smoking.
    Type: Grant
    Filed: January 9, 2003
    Date of Patent: August 31, 2010
    Assignee: Philip Morris USA Inc.
    Inventors: John B. Paine, III, Zuyin Yang, Kent B. Koller, Jay A. Fournier, Charles E. Thomas, Jr., Timothy S. Sherwood, Zhaohua Luan, Shuzhong Zhuang, Jose M. G. Nepomuceno, Diane L. Gee, Georgios D. Karles
  • Publication number: 20100122708
    Abstract: The invention provides a modified adsorbent material impregnated with a metal oxide, which can be used in a filter element adapted for use in a smoking article. The modified adsorbent material exhibits increased filtration efficiency with respect to certain gas phase species of mainstream cigarette smoke. Exemplary adsorbent materials that can be modified according to the invention include activated carbon, molecular sieves, clays, ion exchange resins, activated aluminas, silica gels, meerschaum, and mixtures thereof. One example of a metal oxide is cerium oxide. Impregnation with a metal oxide can be accomplished by directly treating the adsorbent with a metal oxide or impregnating the adsorbent with a metal oxide precursor, such as cerium nitrate, followed by calcining the impregnated material to convert the precursor to the desired metal oxide. Methods of forming the modified adsorbent material and smoking article filters incorporating the modified adsorbent material are also provided.
    Type: Application
    Filed: November 20, 2008
    Publication date: May 20, 2010
    Inventors: Stephen Benson Sears, Chandra Kumar Banerjee
  • Patent number: 7699061
    Abstract: A multi-component filter for a smoking article comprises: a mouth end segment; a first flavour release segment comprising plant leaf upstream of the mouth end segment; and a second flavour release segment comprising filtration material and a flavourant upstream of the first flavour release segment. The resistance to draw of the second flavour release segment is greater than the resistance to draw of the first flavour release segment and the resistance to draw of the second flavour release segment is greater than the resistance to draw of the mouth end segment. The multi-component filter preferably further comprises a rod end segment comprising filtration material upstream of the second flavour release segment, which has a lower resistance to draw than the second flavour release segment.
    Type: Grant
    Filed: July 30, 2007
    Date of Patent: April 20, 2010
    Assignee: Philip Morris USA Inc.
    Inventors: Hugues Seitert, Ahmed Gawad, Levent Lekili, Charles Kuersteiner
  • Patent number: 7669604
    Abstract: A filter element incorporating an adsorbent material is provided. The filter element may comprise a first section of filter material and a second section of filter material spaced apart to form a compartment therebetween. The compartment may be filled with one or more adsorbents or the compartment may be divided into two regions, wherein one compartment region is filled with an adsorbent and the other compartment region is either filled with an ion-exchange resin or remains empty. The section of filter material adjacent to the tobacco rod may include one or more channels therethrough for passaging smoke directly from the tobacco rod into the adsorbent-filled compartment. The mouth end section of filter material may contain a breakable capsule, wherein the breakable capsule is filled with a flavoring agent capable of altering the taste characteristics of mainstream smoke.
    Type: Grant
    Filed: September 30, 2003
    Date of Patent: March 2, 2010
    Assignee: R.J. Reynolds Tobacco Company
    Inventors: Evon Llewellyn Crooks, Joanne Naomi Taylor, Paul Fischer Bernasek
  • Publication number: 20100037905
    Abstract: The invention relates to a filter or filter element with a substantially cylindrical filter body, which contains, in particular, at least two different additives, the additives being located in at least two zones which are arranged one after the other in the longitudinal-axial direction of the filter body and/or in at least two zones, more particularly layers, which at least in sections lie one above the other in the radial direction of the filter body. The invention also relates to a filter or filter element for tobacco smoke, comprising a substantially cylindrical filter body that can be made from a material which in its initial state is flat, more particularly endlessly curled filaments, paper, fibrous webbing, textile material, non-woven and the like, the filter body comprising at least two zones which are arranged one after the other in the longitudinal-axial direction of the filter body, a tobacco-end zone containing an additive and a mouth-end zone being free from additive.
    Type: Application
    Filed: August 10, 2006
    Publication date: February 18, 2010
    Inventors: Günter Maurer, Eberhard Teufel, Paul Rustemeyer, Eckart Schütz