Heater for an aerosol delivery device and methods of formation thereof

• US 10,058,123 B2
• Filed: 07/11/2014
• Issued: 08/28/2018
• Est. Priority Date: 07/11/2014
• Status: Active Grant

• Current Assignee: RAI STRATEGIC HOLDINGS, INC. (British American Tobacco PLC)
• Original Assignee: R J Reynolds Tobacco Company (R. J. Reynolds Tobacco)
• Inventors: Taluskie, Karen V., Sears, Stephen Benson, Hunt, Eric Taylor, Collett, William Robert, Chang, Yi-ping, Weight, Kristen Dodds, Karg, Jeffrey A., Eacock, Graham P., Ebbs, Matthew C., Uschold, Robert C., Sloan, III, Walker MacLaughlin
• Primary Examiner(s): Del Sole, Joseph S
• Assistant Examiner(s): Cummins, IV, Manley L
• Application Number:
  US14/329,334
• Publication Number:
  US 20160007652A1
• Time in Patent Office: 1,509 Days
• Field of Search: None
• CPC Class Codes: A24D 1/22 Cigarettes with integrated combustible heat sources, e.g. with carbonaceous heat sources
• CPC Class Codes: A24F 40/10 Devices using liquid inhalable precursors
• CPC Class Codes: A24F 40/44 Wicks
• CPC Class Codes: A24F 40/46 Shape or structure of electric heating means
• CPC Class Codes: A61M 11/041 using heaters
• CPC Class Codes: A61M 15/06 Inhaling appliances shaped like cigars, cigarettes or pipes
• CPC Class Codes: A61M 16/1045 Devices for humidifying or heating the inspired gas by using recovered moisture or heat from the expired gas

Abstract

The present disclosure relates to aerosol delivery devices, methods of forming such devices, and elements of such devices. In some embodiments, the present disclosure provides a heating member that can be formed of a heating element conformed to a heater substrate configured as a truncated cone (or similar shape) having a first end of a first size and a second end of greater size. In some embodiments, the disclosure provides methods of forming an aerosol delivery device, which can include providing a shell, providing a heating member formed of a heating element conformed to a substrate, configuring the heating member as a truncated cone (or similar shape) having a first end of a first size and a second end of greater size, and inserting the heating member within the shell.

Claims

1. An aerosol delivery device comprising a heating member formed of a heating element conformed to a heater substrate configured as a truncated cone having a first end of a first size and a second end of greater size;

and a porous transport element configured for passage of an aerosol precursor composition along a length thereof, wherein the porous transport element has a first end in a heating arrangement with the heating member wherein the truncated cone includes an interior passage therethrough, and wherein the first end of the porous transport element in the heating arrangement with the heating member is positioned at least partially within the interior passage of the truncated cone.

2. The aerosol delivery device according to claim 1, wherein the heater substrate comprises a film or membrane underlying the heating element.

3. The aerosol delivery device according to claim 2, wherein the heater substrate further comprises a film or membrane overlying the heating element.

4. The aerosol delivery device according to claim 3, wherein one or both of the heater substrate and the film or membrane overlying the heating member comprises a textured surface.

5. The aerosol delivery device according to claim 4, wherein the texturing is configured to provide for capillary flow across the textured surface.

6. The aerosol delivery device according to claim 1, wherein the first end of the porous transport element in the heating arrangement with the heating member is positioned so as to at least partially surround the first end of the truncated cone.

7. The aerosol delivery device according to claim 1, wherein the porous transport element is a fibrous mat.

8. The aerosol delivery device according to claim 7, wherein the fibrous mat comprises a plurality of layers.

9. The aerosol delivery device according to claim 8, wherein the first end of the fibrous mat comprises fewer layers than the remainder of the fibrous mat.

10. The aerosol delivery device according to claim 1, wherein the porous transport element comprises a central passage through the length thereof.

11. The aerosol delivery device according to claim 1, further comprising an airflow path entering the lesser sized first end of the truncated cone, passing through an interior passage therethrough, and exiting past the greater sized second end of the truncated cone.

12. The aerosol delivery device according to claim 1, further comprising an airflow path exterior to the heating member passing around the truncated cone from the first end thereof past the greater sized second end thereof.

13. The aerosol delivery device according to claim 1, wherein the heating member is mounted inside a support frame.

14. The aerosol delivery device according to claim 1, wherein the heater substrate is configured as a frustum.

15. The aerosol delivery device according to claim 1, wherein the heating element comprises an electrically conductive ink.

16. An aerosol delivery device comprising:

a shell having an air inlet and a mouthpiece configured for exit of a formed aerosol;

a heating member positioned within the shell and being formed of a heating element conformed to a heater substrate configured as a frustum with an interior passage therethrough and having a first end of a first size and a second end of greater size;

a porous transport element configured for passage of an aerosol precursor composition along a length thereof, the porous transport element having a first end in a heating arrangement with the heating member;

wherein the first end of the porous transport element in the heating arrangement with the heating member is positioned at least partially within the interior passage of the frustrum; and

an airflow path through the shell from the air inlet to the mouthpiece past the first end of the frustum and then past the second, greater sized end of the frustum.