Smoking article

• US 10,314,334 B2
• Filed: 12/10/2015
• Issued: 06/11/2019
• Est. Priority Date: 12/10/2015
• Status: Active Grant

• Current Assignee: R J Reynolds Tobacco Company (R. J. Reynolds Tobacco)
• Original Assignee: R J Reynolds Tobacco Company (R. J. Reynolds Tobacco)
• Inventors: Ademe, Balager
• Primary Examiner(s): Yaary, Eric
• Assistant Examiner(s): Sparks, Russell E
• Application Number:
  US14/964,906
• Publication Number:
  US 20170164654A1
• Time in Patent Office: 1,279 Days
• Field of Search: 131328
• CPC Class Codes: A24C 5/00 Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
• CPC Class Codes: A24D 1/22 Cigarettes with integrated combustible heat sources, e.g. with carbonaceous heat sources
• CPC Class Codes: A24F 42/10 Devices with chemical heating means

Abstract

A smoking article is provided and has opposed lighting and mouth ends. A mouth end portion is disposed at the mouth end and a heat generation portion is disposed about the lighting end. An outer wrapping material is wrapped at least about the heat generation portion and extends toward the mouth end portion, to define a cylindrical rod. An aerosol-generating portion is disposed within the outer wrapping material and between the heat generation and mouth end portions. The aerosol-generating portion is configured to generate an aerosol in response to heat received from the heat generation portion. Heat from the heat generation portion for aerosol formation is provided by igniting a combustible fuel element (e.g., a plurality of parts or pieces of clean burning carbonaceous material) located within an enclosed heat generation cartridge.

Claims

1. An elongate smoking article having a lighting end and an opposed mouth end, said smoking article comprising:

a mouth end portion disposed about the mouth end;

a heat generation portion disposed about the lighting end;

an outer wrapping material wrapped at least about the heat generation portion and extending toward the mouth end portion, so as to define a cylindrical rod;

a heat generation cartridge disposed within the heat generation portion and being at least partially exposed at the lighting end, the heat generation cartridge being configured to include opposed perforated end portions and a longitudinally extending tubular portion between the end portions to define a structure configured to be received within the heat generation portion, where a plurality of loose objects occupy a cavity defined within the heat generation cartridge to form an ignitable fuel element contained within the heat generation cartridge between the perforated end portions and the longitudinally extending tubular portion, the plurality of objects being capable of emitting heat upon ignition thereof; and

an aerosol-generating portion disposed within the outer wrapping material, between the ignitable fuel element contained within the heat generation cartridge and the mouth end portion, the aerosol-generating portion being configured to generate an aerosol in response to heat received from the heat generation cartridge.

2. The article of claim 1, wherein the heat generation cartridge is configured as a right cylinder or a fluted cylinder, having a longitudinally-extending side wall and the opposed end portions.

3. The article of claim 2, wherein the side wall and each of the opposed ends defines at least one perforation.

4. The article of claim 2, comprising one or more baffles extending inwardly from the side wall between the opposed ends.

5. The article of claim 1, comprising an insulation element wrapped about and extending longitudinally along the heat generation cartridge from the lighting end toward the aerosol-generating portion.

6. The article of claim 5, wherein the insulating element comprises a glass fiber mat, an insulating coating, an insulating paint, a glass sleeve, or a ceramic sleeve.

7. The article of claim 1, wherein the heat generation cartridge is comprised of graphite, carbon fiber-reinforced carbon, ceramic, fibrous refractory composite insulation, aluminum, aluminum oxide, or silicon dioxide.

8. The article of claim 1, wherein the heat generation cartridge includes a first portion defining an inner compartment configured to receive the plurality of objects, and a second portion including an outer sleeve configured to be coaxially disposed with respect to and surrounding the first portion, the outer sleeve being radially spaced apart from the first portion defining the inner compartment and cooperating therewith to define an annulus therebetween.

9. The article of claim 1, wherein the heat generation cartridge comprises a removable end cap configured to cooperate with a receptacle having the plurality of objects received therein so as to form the heat generation cartridge.

10. The article of claim 1, wherein the heat generation cartridge is configured as a right cylinder or a fluted cylinder, having a longitudinally-extending side wall, the opposed end portions, the longitudinally-extending side wall and the opposed end portions defining the cavity within the heat generation cartridge, and a medial divider disposed within the cavity between the opposed end portions, the side wall cooperating with the medial divider and the end portions to define serially-disposed first and second compartments within the cavity, the first compartment being configured to receive the plurality of objects and comprising the heat generation portion, and the second compartment being configured to receive an aerosol generation element and comprising the aerosol-generating portion.

11. The article of claim 1, comprising an aerosol-generating cartridge disposed in the aerosol-generating portion, the aerosol-generating cartridge being configured to include opposed perforated end portions and an aerosol precursor element between the end portions, the aerosol precursor element being capable of forming an aerosol upon heating thereof.

12. A method of forming an elongate smoking article having a lighting end and an opposed mouth end, said method comprising:

wrapping an outer wrapping material at least about a heat generation portion disposed about the lighting end, such that the outer wrapping material extends toward a mouth end portion disposed about the mouth end, and so as to define a cylindrical rod;

disposing a heat generation cartridge within the heat generation portion such that the heat generation cartridge is at least partially exposed at the lighting end, the heat generation cartridge being configured to include opposed perforated end portions and a longitudinally extending tubular portion between the end portions, where a plurality of loose objects occupy a cavity defined within the heat generation cartridge to form an ignitable fuel element contained within the heat generation cartridge between the perforated end portions and the longitudinally extending tubular portion, the plurality of objects being capable of emitting heat upon ignition thereof; and

disposing an aerosol-generating portion within the outer wrapping material, between the ignitable fuel element contained within the heat generation cartridge and the mouth end portion, the aerosol-generating portion being configured to generate an aerosol in response to heat received from the heat generation cartridge.

13. The method of claim 12, wherein disposing the heat generation cartridge comprises disposing the heat generation cartridge, configured as a right cylinder or a fluted cylinder, and having a longitudinally-extending side wall and the opposed end portions, within the heat generation portion.

14. The method of claim 13, wherein disposing the heat generation cartridge comprises disposing the heat generation cartridge, having the side wall and each of the opposed ends defining at least one perforation, within the heat generation portion.

15. The method of claim 13, comprising engaging one or more baffles with the side wall of the heat generation cartridge, the one or more baffles extending inwardly from the side wall between the opposed ends.

16. The method of claim 12, comprising wrapping an insulation element about and longitudinally along the heat generation cartridge, from the lighting end toward the aerosol-generating portion.

17. The method of claim 16, wherein wrapping an insulation element comprises wrapping an insulation element, comprising a glass fiber mat, an insulating coating, an insulating paint, a glass sleeve, or a ceramic sleeve, about and longitudinally along the heat generation cartridge.

18. The method of claim 12, wherein disposing the heat generation cartridge comprises disposing the heat generation cartridge, comprised of graphite, carbon fiber-reinforced carbon, ceramic, fibrous refractory composite insulation, aluminum, aluminum oxide, or silicon dioxide, within the heat generation portion.

19. The method of claim 12, comprising engaging a first portion defining an inner compartment configured to receive the plurality of objects, with a second portion comprising an outer sleeve configured to be coaxially disposed with respect to and surrounding the first portion, so as to form the heat generation cartridge, the heat generation cartridge having the outer sleeve radially spaced apart from the first portion defining the inner compartment and cooperating therewith to define an annulus therebetween.

20. The method of claim 12, comprising engaging a removable end cap with a receptacle having the plurality of objects received therein, so as to form the heat generation cartridge.

21. The method of claim 12, wherein the heat generation cartridge is configured as a right cylinder or a fluted cylinder, having a longitudinally-extending side wall, the opposed end portions, the longitudinally-extending side wall and the opposed end portions defining the cavity within the heat generation cartridge, and a medial divider disposed within the cavity between the opposed end portions, the side wall cooperating with the medial divider and the end portions to define serially-disposed first and second compartments within the cavity, and the method comprises disposing the plurality of objects within the first compartment to form the heat generation portion, and disposing an aerosol generation element within the second compartment to form the aerosol-generating portion.

22. The method of claim 12, wherein disposing an aerosol-generating portion comprises disposing an aerosol-generating cartridge, including opposed perforated end portions and an aerosol precursor element between the end portions, within the aerosol-generating portion, with the aerosol precursor element being capable of forming an aerosol upon heating thereof.