Smoking article with dual heat-conducting elements and improved airflow

Patent metadata

Field	Value
Publication number	US-2016143355-A1
Application number	US-201414896580-A
Country	US
Kind code	A1
Filing date	Aug 12, 2014
Priority date	Aug 13, 2013
Publication date	May 26, 2016
Grant date	—

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; a first heat-conducting element circumscribing a rear portion of the combustible heat source and at least a front portion of the aerosol-forming substrate; a second heat-conducting element around at least a portion of the first heat-conducting element, wherein at least part of the second heat-conducting element is radially separated from the first heat-conducting element; and one or more first air inlets around a periphery of the aerosol-forming substrate.

First claim

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 circumscribing a rear portion of the combustible heat source and at least a front portion of the aerosol-forming substrate; a second heat-conducting element around at least a portion of the first heat-conducting element, wherein at least part of the second heat-conducting element is radially separated from the first heat-conducting element; and one or more first air inlets around a periphery of the aerosol-forming substrate.

2 . The smoking article according to claim 1 , wherein all of the second heat-conducting element is radially separated from the first heat-conducting element.

3 . The smoking article according to claim 1 , wherein the first heat-conducting element and the second heat-conducting element are radially separated by a heat-insulative material.

4 . The smoking article according to claim 1 , wherein the first heat-conducting element and the second heat-conducting element are radially separated by at least 50 microns.

5 . The smoking article according to claim 1 , wherein the second heat-conducting element overlies at least a portion of the combustible heat source and at least a portion of the aerosol-forming substrate.

6 . The smoking article according to claim 1 , wherein the second heat-conducting element extends beyond the first heat-conducting element in a downstream direction.

7 . The smoking article according to claim 1 , wherein the second heat-conducting element overlies an entire length of the aerosol-forming substrate.

8 . The smoking article according to claim 1 , further comprising an outer wrapper around the second heat-conducting element.

9 . The smoking article according to claim 1 , wherein the second heat-conducting element is disposed at an outside of the smoking article, such that the second-heat conducting element is visible on an external surface of the smoking article.

10 . The smoking article according to claim 1 , wherein the second heat-conducting element includes a laminate material comprising one or more layers of a heat-conductive material.

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

12 . The smoking article according to claim 11 , wherein the heat-reflective material is configured to reflect more than 50% of incident radiation.

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

14 . 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.

15 . The smoking article according to claim 1 , wherein the aerosol-forming substrate abuts the rear face of the combustible heat source.

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 second 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 aerosol modifying agents downstream of the aerosol-forming substrate.

Assignees

• Philip Morris Products Sa

Inventors

• Borges Ana
• Apetrei Birza Cristina
• Kuchen David
• Lavanchy Frederic
• Poget Laurent Edouard

Classifications

• A24F47/006 Primary

  Human Necessities · mapped topic

• A24D1/22 Primary

  Cigarettes with integrated combustible heat sources, e.g. with carbonaceous heat sources · CPC title

• A24B15/165

  comprising as heat source a carbon fuel or an oxidized or thermally degraded carbonaceous fuel, e.g. carbohydrates, cellulosic material · CPC title

• A24F42/10 Primary

  Devices with chemical heating means · CPC title

• A24F42/60

  Constructional details · CPC title