Smoking article with non-overlapping, radially separated, dual heat-conducting elements

Patent metadata

Field	Value
Publication number	US-10159277-B2
Application number	US-201414915769-A
Country	US
Kind code	B2
Filing date	Sep 1, 2014
Priority date	Sep 2, 2013
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

A smoking article is provided, including a combustible heat source having opposed front and rear faces; an aerosol-forming substrate downstream of the rear face of the heat source; a first heat-conducting element including one or more radially inner layers of heat-conductive material overlying a rear portion of the combustible heat source; and a second heat-conducting element including one or more radially outer layers of heat-conductive material overlying at least a portion of the aerosol-forming substrate, such that the one or more radially outer layers of heat-conductive material do not overlie the one or more radially inner layers of heat-conductive material.

First claim

The invention claimed is:

1. A smoking article, comprising:
a combustible heat source having opposed front and rear faces;
an aerosol-forming substrate downstream of the rear face of the combustible heat source;
a first heat-conducting element comprising one or more radially inner layers of heat-conductive material overlying a rear portion of the combustible heat source; and
a second heat-conducting element comprising one or more radially outer layers of heat-conductive material overlying at least a portion of the aerosol-forming substrate,
wherein a radial distance between a longitudinal axis of the smoking article and the one or more radially outer layers of heat-conductive material is greater than a radial distance between the longitudinal axis of the smoking article and the one or more radially inner lavers of heat-conductive material, and
wherein the one or more radially outer layers of heat-conductive material do not overlie the one or more radially inner layers of heat-conductive material.

2. The smoking article according to claim 1 ,
wherein the one or more radially inner layers of heat-conductive material overlying the rear portion of the combustible heat source also overlie a front portion of the aerosol-forming substrate, and
wherein the one or more radially outer layers of heat-conductive material also overlie a rear portion of the aerosol-forming substrate.

3. The smoking article according to claim 1 , wherein the one or more radially outer layers of heat-conductive material overlie an entire length of the aerosol-forming substrate.

4. The smoking article according to claim 1 , wherein the one or more radially outer layers of heat-conductive material of the second heat-conducting element are longitudinally spaced apart from the one or more radially inner layers of heat-conductive material of the first heat-conducting element.

5. The smoking article according to claim 1 , wherein the second heat-conducting element is formed of a laminate material comprising one or more layers of heat-conductive-material and one or more layers of heat-insulative material.

6. The smoking article according to claim 1 , wherein the second heat-conducting element comprises one or more layers of heat-reflective material.

7. The smoking article according to claim 6 , wherein the heat-reflective material reflects more than 50% of incident radiation.

8. The smoking article according to claim 1 , wherein the first heat-conducting element and the second heat-conducting element are radially separated by one or more layers of heat-insulative material.

9. The smoking article according to claim 1 , further comprising an outer wrapper around at least a portion of the second heat-conducting element.

10. The smoking article according to claim 1 , wherein a radially outer layer of heat-conductive material of the one or more radially outer layers is provided on an outside of the smoking article, such that the radially outer layer of heat-conductive material is visible on an exterior of the smoking article.

11. The smoking article according to claim 1 , further comprising a non-combustible substantially air impermeable barrier between the rear face of the combustible heat source and the aerosol-forming substrate.

12. The smoking article according to claim 1 , wherein the combustible heat source is a blind combustible heat source.

13. The smoking article according to claim 1 , further comprising one or more airflow channels extending from the front face to the rear face of the combustible heat source.

14. The smoking article according to claim 13 , further comprising a non-combustible substantially air impermeable barrier between the combustible heat source and the one or more airflow channels.

15. The smoking article according to claim 1 , further comprising one or more air inlets around a periphery of the aerosol-forming substrate.

16. The smoking article according to claim 1 , wherein the aerosol-forming substrate is spaced apart from the rear face of the combustible heat source.

17. The smoking article according to claim 16 , further comprising one or more air inlets between the rear face of the combustible heat source and the aerosol-forming substrate.

18. The smoking article according to claim 1 , further comprising one or more air inlets downstream of the aerosol-forming substrate.

19. The smoking article according to claim 1 , further comprising one or more aerosol modifying agents downstream of the aerosol-forming substrate.

Assignees

• Philip Morris Products Sa

Inventors

• Bonnely Samuel

Classifications

• A24D1/02

  with special covers · CPC title

• A61M15/06

  Inhaling appliances shaped like cigars, cigarettes or pipes · CPC title

• A24D1/027 Primary

  with ventilating means, e.g. perforations · CPC title

• A24F47/006 Primary

  Human Necessities · mapped topic

• A24F42/60

  Constructional details · CPC title