Smoking article and associated manufacturing method

Abstract

A method and apparatus for forming a smoking article are provided and involve engaging a heat generation segment and a tobacco rod segment with the wrapping material in a longitudinally spaced-apart relation, the outer wrapping material having a heat-conductive strip engaged therewith, and the heat generation segment and/or the tobacco rod segment at least partially overlapping one end of the heat-conductive strip. Lateral ends of the wrapping material are wrapped at most partially about the heat generation and tobacco rod segments such that the heat generation and tobacco rod segments cooperate with the heat-conductive strip to define a longitudinally-extending cavity accessible between the respective lateral ends of the wrapping material and heat-conductive strip. Aerosol generation elements are deposited into the longitudinally-extending cavity (i.e., by gravity feed) between the lateral ends of the heat-conductive strip, and the cavity is closed by overlapping and sealing the lateral ends of the wrapping material.

1 . A method of forming an elongate smoking article, said method comprising:
 engaging a heat generation segment and a tobacco rod segment with an outer wrapping material in a longitudinally spaced-apart relation in relation to a length of the outer wrapping material, the outer wrapping material having a heat-conductive strip engaged therewith, the heat-conductive strip having longitudinally spaced-apart ends arranged in relation to the length of the outer wrapping material, and at least one of the heat generation segment and the tobacco rod segment at least partially overlapping one of the longitudinal ends of the heat-conductive strip;   wrapping lateral ends of the outer wrapping material at most partially about the heat generation segment and the tobacco rod segment such that the heat generation segment and the tobacco rod segment cooperate with the heat-conductive strip to define a longitudinally-extending cavity accessible between the lateral ends of the outer wrapping material and lateral ends of the heat-conductive strip;   depositing a plurality of aerosol generation elements into the longitudinally-extending cavity between the lateral ends of the heat-conductive strip; and   closing the longitudinally-extending cavity by overlapping and sealing the lateral ends of the outer wrapping material.   
     
     
         2 . The method according to  claim 1 , further comprising engaging the heat-conductive strip with the length of the outer wrapping material. 
     
     
         3 . The method according to  claim 2 , wherein engaging the heat-conductive strip comprises engaging the heat-conductive strip with the outer wrapping material by applying a lamination adhesive therebetween. 
     
     
         4 . The method according to  claim 1 , wherein engaging the heat generation segment and the tobacco rod segment comprises engaging the heat generation segment and the tobacco rod segment with the outer wrapping material such that only the heat generation segment at least partially overlaps one of the longitudinal ends of the heat-conductive strip. 
     
     
         5 . The method according to  claim 1 , further comprising engaging a spacer element with the heat generation segment, such that the spacer element and the tobacco rod segment cooperate with the heat-conductive strip to define the longitudinally-extending cavity, the spacer element being one of heat-conductive and air permeable. 
     
     
         6 . The method according to  claim 1 , wherein wrapping lateral ends of the outer wrapping material comprises wrapping lateral ends of the outer wrapping material at most partially about the heat generation segment and the tobacco rod segment such that the longitudinally-extending cavity extends vertically downward from an opening defined between the lateral ends of the heat-conductive strip. 
     
     
         7 . The method according to  claim 1 , wherein depositing the plurality of aerosol generation elements comprises depositing the plurality of aerosol generation elements, selected from the group consisting of pellets, beads, discrete small units, carbon pieces, extruded carbon pieces, alumina beads, marumarized tobacco pieces, extruded or compressed cylindrical or spherical elements, milled tobacco lamina, fillers, flavors, visible aerosol forming materials, binders, ovoid elements, irregularly shaped elements, shredded pieces, flakes, elements including tobacco, elements including a visible aerosol-forming material, and combinations thereof, into the longitudinally-extending cavity. 
     
     
         8 . The method according to  claim 7 , wherein depositing the plurality of aerosol generation elements comprises selecting a plurality of forms of the aerosol generation elements, and separately depositing each selected form of the aerosol generation elements into the cavity. 
     
     
         9 . The method according to  claim 7 , wherein depositing the plurality of aerosol generation elements comprises selecting a plurality of forms of the aerosol generation elements, combining the selected forms of the aerosol generation elements to produce an aerosol generation element mixture, and depositing the mixture into the cavity. 
     
     
         10 . The method according to  claim 1 , wherein depositing the plurality of aerosol generation elements comprises depositing the plurality of aerosol generation elements into the longitudinally-extending cavity, such that the cavity is at least about 65% filled with the aerosol generation elements. 
     
     
         11 . The method according to  claim 1 , wherein closing the longitudinally-extending cavity comprises wrapping the lateral ends of the heat-conductive strip about the aerosol generation elements such that the lateral ends of the heat conductive strip abut each other. 
     
     
         12 . The method according to  claim 1 , wherein closing the longitudinally-extending cavity comprises wrapping the lateral ends of the heat-conductive strip about the aerosol generation elements such that the lateral ends of the heat-conductive strip overlap. 
     
     
         13 . The method according to  claim 1 , wherein closing the longitudinally-extending cavity comprises applying a seam-sealing adhesive between the overlapping lateral ends of the outer wrapping material for sealing the lateral ends of the outer wrapping material together. 
     
     
         14 .- 26 . (canceled)