Aerosol generating article with ventilation zone

Patent metadata

Field	Value
Publication number	US-2019014813-A1
Application number	US-201616066179-A
Country	US
Kind code	A1
Filing date	Dec 19, 2016
Priority date	Dec 31, 2015
Publication date	Jan 17, 2019
Grant date	—

Abstract

An aerosol generating article is provided, including a combustible heat source; an aerosol forming substrate downstream of the combustible heat source; and a wrapper circumscribing at least a rear portion of the combustible heat source and at least a front portion of the aerosol forming substrate, wherein a plurality of weakness formations are provided on a region of the wrapper overlying the combustible heat source, and wherein the wrapper is rupturable at the plurality of weakness formations and is configured to form a ventilation zone comprising a plurality of apertures extending through the wrapper.

First claim

1 .- 16 . (canceled)

17 . An aerosol generating article, comprising:
a combustible heat source; an aerosol forming substrate downstream of the combustible heat source; and a wrapper circumscribing at least a rear portion of the combustible heat source and at least a front portion of the aerosol forming substrate, wherein a plurality of weakness formations are provided on a region of the wrapper overlying the combustible heat source, and wherein the wrapper is rupturable at the plurality of weakness formations and is configured to form a ventilation zone comprising a plurality of apertures extending through the wrapper.

18 . The aerosol generating article according to claim 17 , wherein at least one of the weakness formations is defined by one or more lines of weakness.

19 . The aerosol generating article according to claim 17 , wherein at least one of the weakness formations is defined by two or more intersecting lines of weakness.

20 . The aerosol generating article according to claim 17 , wherein the plurality of weakness formations are formed from a local reduction in thickness of the wrapper.

21 . The aerosol generating article according to claim 17 , wherein each weakness formation of the plurality of weakness formations has a circumferential dimension of at least about 0.5 mm.

22 . The aerosol generating article according to claim 17 , wherein each weakness formation of the plurality of weakness formations has a circumferential dimension of from about 0.5 mm to about 2.6 mm.

23 . The aerosol generating article according to claim 17 , wherein each weakness formation of the plurality of weakness formations has a circumferential dimension of from about 0.8 mm to about 1.8 mm.

24 . The aerosol generating article according to claim 17 , wherein each weakness formation of the plurality of weakness formations has a length of at least about 0.1 mm.

25 . The aerosol generating article according to claim 17 , wherein each weakness formation of the plurality of weakness formations has a length of from about 0.1 mm to about 2.1 mm.

26 . The aerosol generating article according to claim 17 , wherein each weakness formation of the plurality of weakness formations has a length of from about 0.2 mm to about 1.8 mm.

27 . The aerosol generating article according to claim 17 , wherein adjacent weakness formations among the plurality of weakness formations are separated in a circumferential direction by a circumferential separation of at least about 0.5 mm.

28 . The aerosol generating article according to claim 17 , wherein adjacent weakness formations among the plurality of weakness formations are separated in a longitudinal direction by a longitudinal separation of at least about 0.4 mm.

29 . The aerosol generating article according to claim 17 , wherein the plurality of weakness formations are provided in a regular pattern.

30 . The aerosol generating article according to claim 17 , wherein the plurality of weakness formations are arranged such that the plurality of apertures have a total area of at least about 0.09 millimetres squared.

31 . The aerosol generating article according to claim 17 , wherein the weakness formations of the plurality of weakness formations are arranged such that the plurality of apertures form indicia on an outer surface of the wrapper.

32 . The aerosol generating article according to claim 17 , wherein the wrapper is formed from a heat conductive material.

33 . The aerosol generating article according to claim 17 , wherein the wrapper is substantially impermeable to air.

34 . The aerosol generating article according to claim 17 , wherein the wrapper circumscribes the combustible heat source along at least about 50 percent of a length of the combustible heat source.

35 . The aerosol generating article according to claim 34 , wherein the weakness formations of the plurality of weakness formations are provided on the wrapper such that a ventilation zone extends along at least about 50 percent of the length of the combustible heat source.

36 . The aerosol generating article according to claim 17 , wherein the wrapper is in direct contact with an outer surface of the combustible heat source.

Assignees

• Philip Morris Products Sa

Inventors

• Carraro Andrea
• Batista Rui Nuno

Classifications

• A24D1/027 Primary

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

• A24D1/025

  the covers having material applied to defined areas, e.g. bands for reducing the ignition propensity · CPC title

• A24D1/02

  with special covers · CPC title

• A24D3/043

  with ventilation means, e.g. air dilution (A24D3/041 takes precedence) · CPC title

• A24F47/006

  Human Necessities · mapped topic