Aerosol generating article comprising a heat-insulating sleeve

Abstract

An aerosol-generating article is provided, configured to be electrically heated in an aerosol-generating device, the aerosol-generating article including: an inner substrate core including an aerosol-generating substrate; a heat-insulating sleeve surrounding the inner substrate core; and an outer wrapper surrounding the heat-insulating sleeve, a susceptor being arranged in the inner substrate core and the susceptor being in contact with the heat-insulating sleeve, and the susceptor being made of a sheet material. A method for manufacturing an aerosol-generating article and an apparatus for manufacturing an aerosol-generating article are also provided.

1 .- 16 . (canceled) 
     
     
         17 . An aerosol-generating article, configured to be electrically heated in an aerosol-generating device, the aerosol-generating article comprising:
 an inner substrate core comprising an aerosol-generating substrate;   a heat-insulating sleeve surrounding the inner substrate core; and   an outer wrapper surrounding the heat-insulating sleeve,   wherein a susceptor is arranged in the inner substrate core and the susceptor is in contact with the heat-insulating sleeve, and   wherein the susceptor is made of a sheet material.   
     
     
         18 . The aerosol-generating article according to  claim 17 , wherein the heat-insulating sleeve comprises fibrous material. 
     
     
         19 . The aerosol-generating article according to  claim 17 , wherein the heat-insulating sleeve has a radial layer thickness varying less than 10 percent. 
     
     
         20 . The aerosol-generating article according to  claim 17 , wherein the inner substrate core has an outer cross-section, whose major diameter is less than 5 percent longer than its minor diameter, and the heat-insulating sleeve has an inner cross-section corresponding to the outer cross-section of the inner substrate core. 
     
     
         21 . A method for manufacturing an aerosol-generating article, the method comprising the steps of:
 conveying an aerosol-generating substrate through a sleeve converging device in a conveying direction;   supplying a heat-insulating material comprising fibrous material to the sleeve converging device, such that the heat-insulating material is arranged circumferentially around the aerosol-generating substrate in the sleeve converging device; and   converging the heat-insulating material to form a heat-insulating sleeve around the aerosol-generating substrate.   
     
     
         22 . The method according to  claim 21 , wherein the step of converging the heat-insulating material to form a heat-insulating sleeve around the aerosol-generating substrate takes place in parallel to the step of conveying the aerosol-generating substrate through the sleeve converging device in the conveying direction. 
     
     
         23 . The method according to  claim 21 , further comprising the step of distributing the heat-insulating material equally circumferentially in the sleeve converging device to form a heat-insulating sleeve of substantially constant thickness. 
     
     
         24 . The method according to  claim 21 , wherein the step of supplying the heat-insulating material comprises guiding the heat-insulating material along a guiding system. 
     
     
         25 . The method according to  claim 24 ,
 wherein the heat-insulating material is guided along a guide surface of the guiding system, and   wherein the guide surface faces away from the aerosol-generating substrate.   
     
     
         26 . The method according to  claim 21 , further comprising the step of converging aerosol-generating material and a susceptor to form the aerosol-generating substrate with an embedded susceptor. 
     
     
         27 . An apparatus for manufacturing an aerosol-generating article, the apparatus comprising:
 a guiding system configured to form a heat-insulating sleeve of heat-insulating material; and   a sleeve converging device for enveloping an aerosol-generating substrate with the heat-insulating sleeve.   
     
     
         28 . The apparatus according to  claim 27 , wherein the sleeve converging device comprises a funnel. 
     
     
         29 . The apparatus according to  claim 27 , further comprising a wrapper supplying device configured to supply an outer wrapper to be wrapped around the heat-insulating sleeve. 
     
     
         30 . The apparatus according to  claim 27 , wherein the guiding system comprises a first guide element and a second guide element, each providing a respective guide surface along which the heat-insulating material for forming the heat-insulating sleeve is guided. 
     
     
         31 . The apparatus according to  claim 27 , further comprising an expansion device comprising a first pair of expansion rollers configured to guide the heat-insulating material through a nip between the first pair of expansion rollers. 
     
     
         32 . An acetate tow configured to envelope an aerosol-generating substrate of an aerosol-generating article, the acetate two being further configured to reduce heat dissipation from a heating element in the aerosol-generating substrate to an outer surface of the aerosol-generating article, wherein a susceptor is arranged in the aerosol-generating substrate and the susceptor is in contact with the acetate tow, wherein the susceptor is made of a sheet material.