Thermal laminate rods for use in aerosol-generating articles

Patent metadata

Field	Value
Publication number	US-10993473-B2
Application number	US-201415101269-A
Country	US
Kind code	B2
Filing date	Dec 4, 2014
Priority date	Dec 5, 2013
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

A rod and a method of forming a rod are provided. The rod includes a gathered sheet of material circumscribed by a wrapper, in which the sheet of material is a co-laminated sheet comprising a layer of an aerosol-forming material and a layer of a thermally-conductive material and in which the wrapper is a metal foil. The method includes providing a continuous co-laminated sheet including an aerosol-forming material and a thermally-conductive material; gathering the co-laminated sheet transversely relative to its longitudinal axis; circumscribing the gathered co-laminated sheet with a metal foil wrapper to form a continuous rod; and severing the continuous rod into a plurality of discrete rods.

First claim

The invention claimed is:

1. A heated aerosol-generating article, comprising a combustible heat source and an aerosol-forming substrate comprising a rod located downstream of the combustible heat source, the rod comprising:
a gathered sheet of material that is convoluted, folded, or otherwise compressed or constricted substantially transversely to a cylindrical axis of the rod and is circumscribed by a wrapper,
wherein the gathered sheet of material is a co-laminated sheet comprising a layer of an aerosol-forming material and a layer of a thermally-conductive material,
wherein the gathered sheet of material extends along substantially an entire length of the rod and across substantially an entire transverse cross-sectional area of the rod, and
wherein the wrapper is a metal foil.

2. The heated aerosol-generating article according to claim 1 , wherein the thermally-conductive material is a metal foil.

3. The heated aerosol-generating article according to claim 1 , wherein the metal foil of the wrapper and/or the thermally-conductive material is aluminium foil.

4. The heated aerosol-generating article according to claim 1 , wherein the aerosol-forming material comprises tobacco.

5. The heated aerosol-generating article according to claim 1 , wherein the co-laminated sheet comprises the layer of the thermally-conductive material sandwiched between two layers of the aerosol-forming material.

6. The heated aerosol-generating article according to claim 1 , wherein the co-laminated sheet is textured.

7. The heated aerosol-generating article according to claim 6 , wherein the co-laminated sheet is crimped.

8. The heated aerosol-generating article according to claim 1 , further comprising one or more further sheets of material, gathered together with the co-laminated sheet and circumscribed by the wrapper.

9. A method of forming a heated aerosol-generating article, comprising a combustible heat source and an aerosol-forming substrate comprising a discrete rod located downstream of the combustible heat source, the method comprising:
providing a continuous co-laminated sheet of material comprising a layer of an aerosol-forming material and a layer of a thermally-conductive material;
gathering the co-laminated sheet of material such that it is convoluted, folded, or otherwise compressed or constricted substantially transversely relative to its longitudinal axis;
circumscribing the gathered co-aminated sheet of material with a metal foil wrapper to form a continuous rod, wherein the gathered co-laminated sheet of material extends along substantially an entire length of the continuous rod and across substantially an entire transverse cross-sectional area of the continuous rod; and
severing the continuous rod into a plurality of discrete rods.

10. A heated aerosol-generating article for an electrically-heated aerosol-generating system comprising an aerosol-forming substrate, the substrate comprising a rod, the rod comprising:
a gathered sheet of material that is convoluted, folded, or otherwise compressed or constricted substantially transversely to a cylindrical axis of the rod and is circumscribed by a wrapper,
wherein the gathered sheet of material is a co-laminated sheet comprising a layer of an aerosol-forming material and a layer of a thermally-conductive material,
wherein the gathered sheet of material extends along substantially an entire length of the rod and across substantially an entire transverse cross-sectional area of the rod, and
wherein the wrapper is a metal foil.

11. The heated aerosol-generating article according to claim 10 , wherein the thermally-conductive material is a metal foil.

12. The heated aerosol-generating article according to claim 10 , wherein the metal foil of the wrapper and/or the thermally-conductive material is aluminium foil.

13. The heated aerosol-generating article according to claim 10 , wherein the aerosol-forming material comprises tobacco.

14. The heated aerosol-generating article according to claim 10 , wherein the co-laminated sheet comprises the layer of the thermally-conductive material sandwiched between two layers of the aerosol-forming material.

15. The heated aerosol-generating article according to claim 10 , wherein the co-laminated sheet is textured.

16. The heated aerosol-generating article according to claim 15 , wherein the co-laminated sheet is crimped.

17. The heated aerosol-generating article according to claim 10 , further comprising one or more further sheets of material, gathered together with the co-laminated sheet and circumscribed by the wrapper.

Assignees

• Philip Morris Products Sa

Inventors

• Malgat Alexandre
• Roudier Stephane
• Borges De Couraca Ana Carolina
• Lavanchy Frederic
• Meyer Cedric

Classifications

• A61M2205/8206

  battery-operated · CPC title

• A24F42/60

  Constructional details · CPC title

• A24F42/10 Primary

  Devices with chemical heating means · CPC title

• A24F40/40

  Constructional details, e.g. connection of cartridges and battery parts · CPC title

• A24D1/22

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