ELECTRICALLY HEATED SMOKING SYSTEM WITH INTERNAL OR EXTERNAL HEATER

• US 20110126848A1
• Filed: 11/26/2010
• Published: 06/02/2011
• Est. Priority Date: 11/27/2009
• Status: Active Grant

• Current Assignee: Philip Morris USA Incorporated (Altria Group, Inc.)
• Original Assignee: Philip Morris USA Incorporated (Altria Group, Inc.)
• Inventors: Plojoux, Julien, Zuber, Gérard, Ruscio, Dani, Greim, Olivier
• Granted Patent: US 9,084,440 B2
• Time in Patent Office: Days
• US Class Current: 131/329
• CPC Class Codes: A24F 40/10 Devices using liquid inhalable precursors
• CPC Class Codes: A24F 40/20 Devices using solid inhalable precursors
• CPC Class Codes: A24F 40/46 Shape or structure of electric heating means

Abstract

An electrically heated smoking system for receiving an aerosol forming substrate includes a heater for heating the substrate to form the aerosol. The heater includes a heating element. The electrically heated smoking system and the heating element are arranged such that, when the aerosol forming substrate is received in the electrically heated smoking system, the heating element extends a distance only partially along the length of the aerosol forming-substrate, and the heating element is positioned towards the downstream end of the aerosol forming substrate.

Claims

1. An electrically heated smoking system comprising:

an aerosol forming substrate; and

a heater for heating the substrate to form the aerosol, the heater including a first heating element,

wherein the electrically heated smoking system and the first heating element are arranged such that, when the aerosol forming substrate is received in the electrically heated smoking system, the first heating element extends a distance only partially along a length of the aerosol forming-substrate, and the first heating element is positioned towards a downstream end of the aerosol forming substrate.

2. The electrically heated smoking system of claim 1, wherein the first heating element extends substantially fully around a circumference of the aerosol forming substrate.

3. The electrically heated smoking system of claim 1, wherein the first heating element is arranged to be inserted into the aerosol forming substrate.

4. The electrically heated smoking system of claim 1, wherein a downstream end of the first heating element is upstream of the downstream end of the aerosol forming substrate by a distance greater than or equal to about 1 mm.

5. The electrically heated smoking system of claim 1, wherein an upstream end of the first heating element is downstream of an upstream end of the aerosol forming substrate by a distance ranging from about 2 mm to about 6 mm.

6. The electrically heated smoking system of claim 5, wherein the upstream end of the first heating element is downstream of the upstream end of the aerosol forming substrate by a distance of about 4 mm.

7. The electrically heated smoking system of claim 1, wherein the ratio of the distance that the first heating element extends along the aerosol forming substrate, to the length of the aerosol forming substrate, ranges from about 0.35 to about 0.6.

8. The electrically heated smoking system of claim 1, wherein the ratio of the distance that the first heating element extends along the aerosol forming substrate to the length of the aerosol forming substrate is about 0.5.

9. The electrically heated smoking system of claim 1, wherein the heater further includes a second heating element arranged, when the aerosol forming substrate is received in the electrically heated smoking system, to extend a distance only partially along the length of the aerosol forming substrate, and to be upstream of the first heating element.

10. The electrically heated smoking system of claim 9, wherein the separation between the upstream end of the first heating element and the downstream end of the second heating element is equal to or greater than about 0.5 mm.

11. The electrically heated smoking system of claim 9, wherein the upstream end of the second heating element is downstream of the upstream end of the aerosol forming substrate by a distance ranging from about 2 mm to about 4 mm.

12. The electrically heated smoking system of claim 9, wherein the upstream end of the second heating element is downstream of the upstream end of the aerosol forming substrate by a distance of about 3 mm.

13. The electrically heated smoking system of claim 9, wherein the ratio of the distance that the first heating element and the second heating element together extend along the aerosol forming substrate, to the length of the aerosol forming substrate ranges from about 0.5 to about 0.8.

14. The electrically heated smoking system of claim 1, wherein the aerosol forming substrate is a solid substrate.

15. The electrically heated smoking system of claim 1, wherein the aerosol forming substrate is a liquid substrate.