Packaging bag

Abstract

In a packaging bag ( 10 ) with a front wall and a rear wall made of packaging film the front wall and the rear wall are bonded together along a peripheral edge. The front wall and/or the rear wall is printed on the outside of the bag and bonded to a cover film ( 20 a,b ) printed on one or both sides, with substantially its entire area bonded to and peelable from the front or rear wall. The cover films ( 20 a,b ) are permanently attached to the packaging film in an edge area ( 24 a,b ). The arrangement of cover films ( 20 a,b ) increases the number of printable pages from the original two to a maximum of six if a cover film ( 20 a,b ) is arranged on each side of the bag and in addition to the printed packaging film on the front and rear of the bag ( 10 ), both sides of the cover films ( 20 a,b ) are also printed.

1 . Packaging bag with a front wall ( 12 ) and a rear wall ( 14 ) made of a packaging film ( 16 ,  16   a,b ), in which the front wall ( 12 ) and the rear wall ( 14 ) are bonded together along a peripheral edge ( 18 ) and the front wall ( 12 ) and/or the rear wall ( 14 ) is printed on the outside of the bag, characterised in that on the outside of the bag the front wall ( 12 ) and/or the rear wall ( 14 ) is bonded to a cover film ( 20 ,  20   a,b ) which is printed on one or both sides, substantially the entire area of which is bonded to and peelable from the front wall ( 12 ) or rear wall ( 14 ).  
     
     
         2 . Packaging bag according to  claim 1 , characterised in that the front wall ( 12 ) consists of a first packaging film ( 16   a ) and the rear wall ( 14 ) consists of a second packaging film ( 16   b ) and at least one of the packaging films ( 16   a,b ) is bonded to a cover film ( 20   a,b ).  
     
     
         3 . Packaging bag according to  claim 1 , characterised in that the front wall ( 12 ) and the rear wall ( 14 ) are made of the same packaging film ( 16 ) folded and bonded to the cover film ( 20 ).  
     
     
         4 . Packaging bag according to any of the  claims 1  to  3 , characterised in that the cover film ( 20 ,  20   a,b ) is permanently bonded to the packaging film ( 16 ,  16   a,b ) in an edge area ( 24 ,  24   a,b ).  
     
     
         5 . Process for the manufacture of packaging bags ( 10 ) with a front wall ( 12 ) and a rear wall ( 14 ) made of a packaging film ( 16   a,b ), in which the front wall ( 12 ) and the rear wall ( 14 ) are bonded together along a peripheral edge ( 18 ), the front wall ( 12 ) and/or the rear wall ( 14 ) are printed on the outside of the bag and bonded on the outside of the bag to a cover film ( 20   a ) which is printed on one or both sides and with substantially its entire area bonded to and peelable from the front wall ( 12 ) or rear wall ( 14 ), which process has the following steps: 
 A. one or two-sided printing of a cover film web ( 40   a ),    B. coating of one side of the cover film web ( 40   a ) with a peelable plastic layer ( 28   a ),    C. joining the cover film web ( 40   a ) by way of the peelable plastic layer ( 28   a ) to the printed side of a first packaging film web ( 42   a ) to form a peelable bond,    D. joining the first packaging film web ( 42   a ) bonded to the cover film web ( 40   a ) to a second packaging film web ( 42   b ),    E. bonding of the first packaging film web ( 42   a ) with the second packaging film web ( 42   b ) along peripheral edges ( 18 ).    
     
     
         6 . Process for the manufacture of packaging bags ( 10 ) with a front wall ( 12 ) and a rear wall ( 14 ) made of a packaging film ( 16   a,b ), in which the front wall ( 12 ) and the rear wall ( 14 ) are bonded together along a peripheral edge ( 18 ), the front wall ( 12 ) and/or the rear wall ( 14 ) are printed on the outside of the bag and bonded on the outside of the bag to a cover film ( 20   a ) which is printed on one or both sides and with susbtantially its entire area bonded to and peelable from the front wall ( 12 ) or rear wall ( 14 ), which process has the following steps: 
 A. one or two-sided printing of the first cover film web ( 40   a ),    B. coating of one side of the first cover film web ( 40   a ) with a first peelable plastic coating ( 28   a ),    C. joining the first cover film web ( 40   a ) by way of the first peelable plastic coating ( 28   a ) to the printed side of a first packaging film web ( 42   a ) to form a peelable bond,    D. one or two-sided printing of a second cover film web ( 40   b ),    E. coating of one side of the second cover film web ( 40   b ) with a second peelable plastic coating ( 28   b ),    F. joining the second cover film web ( 40   b ) by way of the second peelable plastic coating ( 28   b ) with the printed side of a second packaging film web ( 42   b ) to form a peelable bond,    G. joining the first packaging film web ( 42   a ) bonded to the first cover film web ( 40   a ) to the second packaging film web ( 42   b ) bonded to the second cover film web ( 40   b ),    H. bonding the first packaging film web ( 42   a ) to the second packaging film web ( 42   b ) along the peripheral edges ( 18 ).    
     
     
         7 . Process for the manufacture of packaging bags ( 10 ) with a front wall ( 12 ) and a rear wall ( 14 ) made of a packaging film ( 16   a,b ), in which the front wall ( 12 ) and the rear wall ( 14 ) are bonded together along a peripheral edge ( 18 ), the front wall ( 12 ) and/or the rear wall ( 14 ) are printed on the outside of the bag and bonded on the outside of the bag to a cover film ( 20   a ) which is printed on one or both sides and with substantially its entire area bonded to and peelable from the front wall ( 12 ) or rear wall ( 14 ), which process has the following steps: 
 A. one or two-sided printing of a cover film web ( 40 ),    B. coating of one side of the cover film web ( 40 ) with a peelable plastic coating ( 28 ),    C. joining the cover film web ( 40 ) by way of the peelable plastic coating ( 28 ) with the printed side of a packaging film web ( 42 ) to form a peelable bond,    D. folding the packaging film web ( 42 ) bonded to the cover film web ( 40 ) in the web feed direction,    E. bonding the folded packaging film web ( 42 ) to itself along the peripheral edges ( 18 ).    
     
     
         8 . Process according to one of the  claims 5  to  7 , characterised in that the side of the cover film web ( 40 ,  40   a,b ) coated with the peelable plastic layer ( 28 ,  28   a,b ) is also coated with a permanent adhesive ( 24 ,  24   a,b ) in a pattern such that the permanent adhesive is located in the edge area of the bag.  
     
     
         9 . Process according to  claim 8 , characterised in that all printing of the cover film webs ( 40   40   a,b ) and the packaging film webs ( 42 ,  42   a,b ) and the application of the permanent adhesive pattern ( 24 ,  24   a,b ) are performed using the register printing process.