Cigarette package, wrapping paper for cigarette package, and method and machine for manufacturing wrapping paper

Abstract

A cigarette package is provided with an outer box ( 44 ) and an inner pack ( 56 ) contained within the outer box ( 44 ), and the inner pack ( 56 ) includes a cigarette bundle and an inner wrapper ( 58 ) covering the cigarette bundle. The inner wrapper ( 58 ) has first and second paper layers ( 4, 6 ) forming the opposite surfaces of the inner wrapper ( 58 ), and a moisture-proof layer ( 8 ) interposed between the first and second paper layers ( 4, 6 ), the moisture-proof layer ( 8 ) is made of only paraffin wax and functions also as an adhesive agent for bonding the first and second paper layers ( 4, 6 ).

1 . A cigarette package, comprising: 
 an openable and closable outer box, and    an inner pack contained within said outer box, said inner pack including a bundle of rod-shaped smoking articles and an inner wrapper covering the bundle,    the inner wrapper having 
 a first paper layer forming one surface of the inner wrapper,  
 a second paper layer forming the other surface of the inner wrapper, and  
 a moisture-proof layer interposed between the first and second paper layers, the moisture-proof layer containing paraffin wax as a major constituent and having a thickness sufficient to function as an adhesive agent for bonding the first and second paper layers.  
   
   
   
       2 . The cigarette package according to  claim 1 , wherein 
 the moisture-proof layer consists only of paraffin wax.    
   
   
       3 . The cigarette package according to  claim 2 , wherein 
 the moisture-proof layer has an adhesive strength of about 15 mN/cm or greater relative to the first and second paper layers.    
   
   
       4 . The cigarette package according to  claim 3 , wherein 
 the moisture-proof layer has a thickness produced by applying paraffin wax in an application quantity of about 6 g/m 2  or more.    
   
   
       5 . The cigarette package according to  claim 1 , wherein 
 the first and second paper layers are both made of glassine paper.    
   
   
       6 . The cigarette package according to  claim 5 , wherein 
 the first and second paper layers each have a basis weight of 20 to 40 g/m 2 .    
   
   
       7 . The cigarette package according to  claim 5 , wherein 
 at least one of the first and second paper layers are made of translucent glassine paper.    
   
   
       8 . The cigarette package according to  claim 7 , wherein 
 the paper layer made of translucent glassine paper has information printed on the surface facing the moisture-proof layer.    
   
   
       9 . The cigarette package according to  claim 1 , wherein 
 said outer box includes a separation line for separating said outer box into a box body and a hinge lid.    
   
   
       10 . Wrapping paper for a cigarette package, where the cigarette package comprises an openable and closable outer box and an inner pack contained within the outer box, the inner pack including a bundle of rod-shaped smoking articles and an inner wrapper formed from the wrapping paper and covering the bundle, 
 the wrapping paper comprising    a first paper layer forming one surface of the wrapping paper,    a second paper layer forming the other surface of the wrapping paper, and    a moisture-proof layer interposed between said first and second paper layers, said moisture-proof layer containing paraffin wax as a major constituent and having a thickness sufficient to function as an adhesive agent for bonding said first and second paper layers.    
   
   
       11 . The wrapping paper according to  claim 10 , wherein 
 said first and second paper layers are both made of glassine paper.    
   
   
       12 . The wrapping paper according to  claim 10 , wherein 
 said moisture-proof layer consists only of paraffin wax.    
   
   
       13 . A method of manufacturing wrapping paper for a cigarette package, where the cigarette package comprises an openable and closable outer box and an inner pack contained within the outer box, the inner pack including a bundle of rod-shaped smoking articles and an inner wrapper formed from the wrapping paper and covering the bundle, 
 the method comprising the steps of:    applying a moisture-proof material containing paraffin wax as a major constituent onto a first paper web, thereby forming a moisture-proof layer with a thickness greater than or equal to a predetermined thickness,    placing a second paper web on said moisture-proof layer of said first paper web, thereby forming a laminated web with said moisture-proof layer interposed between said first and second paper webs, and    applying pressure to said laminated web within a predetermined pressure range, while keeping said laminated web at a temperature which is higher than a melting point of the moisture-proof material within a predetermined temperature difference range, thereby bonding said first and second paper webs by means of said moisture-proof layer functioning as an adhesive agent.    
   
   
       14 . The method according to  claim 13 , wherein 
 said predetermined temperature difference range is 10 to 50° C. and said predetermined pressure range is 0.20 to 0.40 mPa.    
   
   
       15 . The method according to  claim 14 , wherein 
 said first and second paper webs are both made of glassine paper.    
   
   
       16 . A machine for manufacturing wrapping paper for a cigarette package, where the cigarette package comprises an openable and closable outer box and an inner pack contained within the outer box, the inner pack including a bundle of rod-shaped smoking articles and an inner wrapper formed from the wrapping paper and covering the bundle, 
 the machine comprising    a first feed path for feeding a first paper web,    an applicator provided on said first feed path, for applying a moisture-proof material containing paraffin wax as a major constituent onto the first paper web, thereby forming a moisture-proof layer with a thickness greater than or equal to a predetermined thickness,    a second feed path for feeding a second paper web to said first feed path,    a roller unit provided between a terminal end of said second feed path and said first feed path, for receiving the first and second paper webs from said first and second feed paths, forming a laminated web with the moisture-proof layer interposed between the first and second paper webs, and delivering the laminated web, and    a bonding device for applying pressure to the laminated web within a predetermined pressure range, while keeping the laminated web at a temperature which is higher than a melting point of the moisture-proof material within a predetermined temperature difference range, thereby bonding the first and second paper webs by means of the moisture-proof layer functioning as an adhesive agent.    
   
   
       17 . The machine according to  claim 16 , wherein 
 said applicator includes a wax tub for holding the moisture-proof material, and    said bonding device includes a first heater for heating the moisture-proof material held in the wax tub.    
   
   
       18 . The machine according to  claim 17 , wherein 
 said roller unit includes    a rotatable receiver roller disposed on said first feed path, and    a rotatable press roller disposed at the terminal end of said second feed path, for forming the laminated web in cooperation with the receiver roller, and    said bonding device further includes    a second heater incorporated in the receiver roller for heating the receiver roller,    a rotatable arm supporting the press roller rotatably, and    an air cylinder for rotating the arm toward the receiver roller, thereby applying pressure to the laminated web.    
   
   
       19 . The machine according to  claim 17 , wherein 
 said applicator further includes    rollers in a pair, each rotatably arranged within the wax tub with the cylindrical surface partly immersed in the moisture-proof material, in the manner that a gap between the rollers is adjustable, and    a rotatable back roller arranged opposite to one of the rollers in a pair, with said first feed path between.    
   
   
       20 . The machine according to  claim 16 , wherein 
 the first and second paper webs are both made of glassine paper.