Smoking Articles and Method for Manufacturing Smoking Articles

Abstract

The invention relates to a method of manufacturing a plurality of smoking articles, comprising providing a wrapping paper having a permeability of less than 15 CU and applying a burn retardant additive material in a predetermined pattern to the wrapping paper. The wrapping paper is wrapped about a tobacco material to form a wrapped rod and the wrapped rod is cut to form the plurality of smoking articles. The invention also relates to a smoking article manufactured by the method, wherein the wrapping paper has a permeability of less than 15 CU in areas without the burn retardant additive and a lower permeability in areas where the additive is applied.

1 . A method of manufacturing a plurality of smoking articles in a making apparatus, comprising:
 providing a continuous web of wrapping paper having a permeability of less than 15 CU from a source thereof to an applicator section;   applying a burn retardant additive material in a predetermined pattern to the web of wrapping paper at the applicator section wherein, in the area of the paper to which the pattern is applied;   feeding the web of wrapping paper to which the additive has been applied to a garniture section;   wrapping the web of wrapping paper to which the additive has been applied, about a tobacco material at the garniture section to form a wrapped rod; and   cutting the wrapped rod to form a plurality of smoking articles.   
     
     
         2 . The method according to  claim 1 , wherein the wrapping paper has a permeability of 5 to 10 CU. 
     
     
         3 . The method according to  claim 1 , further comprising synchronising the applying of the burn retardant additive material with the cutting of the wrapped rod such that the pattern is located in a predetermined position with respect to an end of each smoking article. 
     
     
         4 . The method according to  claim 3 , wherein the wrapped rod is cut so that the pattern is located in substantially the same position on each smoking article. 
     
     
         5 . The method according to  claim 1 , wherein the pattern comprises a plurality of bands which, in a smoking article, extend around the circumference of the smoking article. 
     
     
         6 . The method according to  claim 1 , wherein, in the area of the paper to which the pattern is applied, the burn retardant additive material adds less than 10% to the weight of the paper. 
     
     
         7 . The method according to  claim 1 , wherein, in the area of the paper to which the pattern is applied, the burn retardant additive material adds 2-5% to the weight of the paper. 
     
     
         8 . The method according to  claim 1 , wherein the pattern is applied to the paper forming 25-50% of the length of the wrapped rod at one end of the wrapped rod. 
     
     
         9 . The method according to  claim 8 , further comprising attaching a filter to the end of the wrapped rod at which the pattern is formed. 
     
     
         10 . The method according to  claim 1 , wherein the burn retardant additive includes a gum, an adhesive or an organic or inorganic salt. 
     
     
         11 . The method according to  claim 1 , wherein the pattern is applied by printing. 
     
     
         12 . The method according to  claim 1 , wherein the pattern is applied by spraying. 
     
     
         13 . The method according to  claim 1 , comprising heating the additive and applying the heated additive to the paper. 
     
     
         14 . The method according to  claim 1 , comprising heating the paper after application of the pattern. 
     
     
         15 . A smoking article, comprising:
 a rod of tobacco material;   a wrapping paper surrounding the rod of tobacco material, the wrapping paper having a pattern of a burn retardant additive material applied thereto, the wrapping paper having a permeability of less than 15 CU in areas without the burn retardant additive and a lower permeability in areas where the additive is applied.   
     
     
         16 . The smoking article according to  claim 15 , wherein the wrapping paper has a permeability of 5 to 10 CU in areas without the burn retardant additive. 
     
     
         17 . The smoking article according to  claim 15 , wherein the pattern comprises a plurality of bands which extend around the circumference of a smoking article. 
     
     
         18 . The smoking article according to  claim 15 , wherein, in the area the paper to which the pattern is applied, the burn retardant additive material comprises less than 10% of the weight of the paper. 
     
     
         19 . The smoking article according to  claim 15  wherein, in the area of the paper to which the pattern is applied, the burn retardant additive material adds 2-5% to the weight of the paper. 
     
     
         20 . The smoking article according to  claim 15 , further comprising a filter at one end of the wrapped rod, wherein the pattern is formed over a portion of the length of the wrapped rod adjacent the filter. 
     
     
         21 . The smoking article according to  claim 15 , wherein the pattern is formed over an area covering substantially one half of the length of the wrapped rod. 
     
     
         22 . The smoking article according to  claim 15 , wherein the burn retardant additive includes a gum, an adhesive, or an organic or inorganic salt. 
     
     
         23 . An apparatus for making a plurality of smoking articles, comprising:
 a paper source comprising a continuous web of wrapping paper having a permeability of less than 15 CU, able to supply the web to an applicator section;   the applicator section able to apply a burn retardant additive material in a predetermined pattern to the web of wrapping paper;   a garniture section to receive the web of wrapping paper to which the additive has been applied to wrap it about a tobacco material to form a wrapped rod; and   a cutter for cutting the wrapped rod to form a plurality of smoking articles.