Pack for tobacco articles provided with a pressurized sealed wrap and relative wrapping method

Abstract

A pack provided with: a group of tobacco articles; and a sealed wrap, which encloses the group of articles, has a pull-out opening for the articles, is pressurized so as to have an inner pressure that is higher than the atmospheric pressure, and consists of a heat-sealable sheet of wrapping material, which is folded around the group of articles and is stabilized by means of heat-sealing; in the sealed wrap there is a volatile aromatic substance that is independent of the group of tobacco articles.

1 . A pack ( 1 ) comprising:
 a group ( 4 ) of tobacco articles; and   a sealed wrap ( 3 ), which encloses the group ( 4 ) of articles, has a pull-out opening ( 5 ) for the articles and consists of a heat-sealable sheet ( 14 ) of wrapping material, which is folded around the group ( 4 ) of articles and is stabilized by means of heat-sealing;   the pack ( 1 ) is characterized in that:   the sealed wrap ( 3 ) is pressurized and has an inner pressure that is higher than the atmospheric pressure; and   in the sealed wrap ( 3 ) there is a volatile aromatic substance that is independent of the group ( 4 ) of tobacco articles.   
     
     
         2 . A pack according to  claim 1 , wherein the volatile aromatic substance, due to the inner overpressure of the sealed wrap ( 3 ), comes out of the sealed wrap ( 3 ) the first time the sealed wrap ( 3 ) is opened, thus diffusing a significant quantity of volatilized aromatic substance around the pack ( 1 ). 
     
     
         3 . A pack according to  claim 1 , wherein:
 the tobacco articles are new-generation tobacco articles and are free from shredded tobacco; and   the volatile aromatic substance contains tobacco aroma.   
     
     
         4 . A pack according to  claim 1 , wherein the volatile aromatic substance is pumped into the sealed wrap ( 3 ) in the gaseous state when the overpressure is created. 
     
     
         5 . A pack according to  claim 1 , wherein the volatile aromatic substance is inserted into the sealed wrap ( 3 ) in the liquid or solid state so as to obtain a volatilization of the aromatic substance on the inside of the sealed wrap ( 3 ). 
     
     
         6 . A pack according to  claim 5 , wherein the volatile aromatic substance is applied to the sheet of wrapping material ( 14 ). 
     
     
         7 . A pack according to  claim 5 , wherein:
 a rigid reinforcement element ( 10 ) is provided, which is arranged on the inside of the sealed wrap ( 3 ) in contact with the group ( 4 ) of tobacco articles and embraces the group ( 4 ) of tobacco articles; and   the volatile aromatic substance is applied to the reinforcement element ( 10 ).   
     
     
         8 . A pack according to  claim 5  and comprising a permeable support which is arranged in contact with the group ( 4 ) of tobacco articles and contains the volatile aromatic substance. 
     
     
         9 . A wrapping method to manufacture a pack ( 1 ) of tobacco articles comprising a sealed wrap ( 3 ); the wrapping method comprising the steps of:
 folding a heat-sealable sheet ( 14 ) of wrapping material around a group ( 4 ) of tobacco articles to obtain the wrap ( 3 ); and   heat-sealing overlapping portions of the sheet ( 14 ) of wrapping material to stabilize and seal the wrap ( 3 );   the wrapping method is characterized in that it comprises the further steps of:   feeding into the sealed wrap ( 3 ) a volatile aromatic substance that is independent of the group ( 4 ) of tobacco articles; and   increasing the inner pressure of the sealed wrap ( 3 ) , in order to cause the sealed wrap ( 3 ) to have an inner pressure that is higher than the atmospheric pressure.   
     
     
         10 . A method according to  claim 9 , wherein the volatile aromatic substance, due to the inner overpressure of the sealed wrap ( 3 ), comes out of the sealed wrap ( 3 ) the first time the sealed wrap ( 3 ) is opened, thus diffusing a significant quantity of volatilized aromatic substance around the pack ( 1 ).