Film bag and method for producing it

Abstract

The invention relates to a film bag with two front faces ( 1, 1′ ), side folds ( 2 ) which are inserted between the front faces in a V-shaped manner, and a resealable closure ( 3 ) in a top opening in the bag, comprising two profiled strips ( 4, 4′ ) and a slide ( 5 ). The film layers of the bag which rest one on the other are connected to transverse and longitudinal sealed seams at the bottom and along the edges of the side folds ( 2 ), with the longitudinal sealed seams ( 6 ) which run along the side folds extending from the bottom to the upper edge ( 7 ) of the bag. The resealable closure ( 3 ), including its slide ( 5 ), is arranged at a distance from the upper bag edge ( 7 ) inside the bag. At least one front face ( 1′ ) of the bag contains a punched-out area ( 8 ) for the slide ( 5 ) which is matched to the dimensions of the slide ( 5 ) and in which the slide ( 5 ) is positioned before the bag is used for the first time. The invention also relates to a method for producing the described film bag.

1 . A film bag with
 two front faces ( 1 ,  1 ′),   side folds ( 2 ) which are inserted between the front faces in a V-shaped manner, and   a resealable closure ( 3 ) in a top opening in the bag, comprising two profiled strips ( 4 ,  4 ′) and a slide ( 5 ) joining said profile strips,   
       wherein one of said profiled strips ( 4 ) is connected to a front face ( 1 ) and the other profiled strip ( 4 ′) after a filling of the bag can be connected to said other front face ( 1 ′), wherein the film layers of the bag which rest one on top of the other are connected to transverse and longitudinal sealed seams at the bottom side and along the edges of said side folds ( 2 ) and wherein the longitudinal sealed seams running along said side folds ( 2 ) extend from the bottom to the upper edge ( 7 ) of the bag, wherein said resealable closure ( 3 ) including its slide ( 5 ) is arranged at a distance from the upper bag edge ( 7 ) inside the bag and that at least one front face ( 1 ′) of said bag contains a punched out area ( 8 ) for the slide which is matched to the dimensions of said slide ( 5 ), in which said slide ( 5 ) is positioned before the use of the bag for the first time. 
     
     
         2 . The film bag according to  claim 1 , wherein said front faces ( 1 ,  1 ′) have a strip-shaped section ( 9 ) at the upper end of said bag covering said resealable closure ( 3 ), which can be torn off along a perforation line ( 10 ) arranged at the level of said slide ( 5 ) or below said slide. 
     
     
         3 . The film bag according to  claim 2 , wherein punching lines ( 11 ) which extend through said longitudinal sealed seams ( 6 ) to the outer edges of said bag join at the ends of said perforation lines ( 10 ). 
     
     
         4 . The film bag according to  claim 2 , wherein said side folds ( 2 ) end below said perforation line ( 10 ). 
     
     
         5 . The film bag according to  claim 1 , wherein said profiled strip ( 4 ) connected to said front face ( 1 ) before a filling of the bag is connected on its entire length only to said front face ( 1 ) and extends into the region of said side folds ( 2 ). 
     
     
         6 . The film bag according to  claim 1 , wherein said profiled strip ( 4 ) connected to said front face ( 1 ) is placed over said side folds ( 2 ) and connected with these before a filling of a bag. 
     
     
         7 . The method for producing film bags according to  claim 1 , comprising the following method steps:
 a) in a planar film web ( 13 ) slide punch outs ( 8 ) are introduced;   b) resealable closures ( 3 ) consisting of two profiled strips ( 4 ,  4 ′) resting one on the other and connected to each other as well as a slide ( 5 ), which overlaps the sealing edges of said profiled strips ( 4 ,  4 ′) in a rider-like manner, are disposed transverse to the web direction such on the planer film web ( 13 ) that the slide ( 5 ) lie in said slide punch-outs ( 8 ), and are connected at the ends to said film web ( 13 );   c) said film web ( 13 ) is guided through folding stations ( 14 ) in which said film web ( 13 ) is folded and side folds ( 2 ) are formed;   d) the film layers which rest one on the other are connected by sealed seams ( 6 ,  16 ,  16 ′), wherein the bottom of the bags formed with transverse sealed seams ( 16 ,  16 ′) transverse to the web direction and said resealable closures ( 3 ) are connected with a front face ( 1 ) of the bags and wherein along said side folds ( 2 ) longitudinal sealed seams ( 6 ) are applied in the longitudinal direction of the web, which extend from the bottom to the upper edge ( 7 ) of the bags;   e) bags are separated from the bag run ( 17 ) formed in the method step d).   
     
     
         8 . The method according to  claim 7 , wherein window-shaped openings ( 19 ) which define the upper end of said bag folds ( 2 ) are punched out in zones ( 18 ) of said planar film web ( 13 ) from which said side folds ( 2 ) are formed. 
     
     
         9 . The method according to  claim 8 , wherein in said film web ( 13 ) transverse to the longitudinal direction of the web, perforation lines ( 10 ) are punched which are arranged at the level of said window-shaped openings ( 19 ) and which define in said bag run ( 17 ), respectively, a strip-shaped section ( 9 ) which projects over said slide ( 5 ) of said resealable closure ( 3 ) up to said bottom sealed seam ( 16 ′) of the adjacent bag, wherein said perforation lines extend over the width of the web provided that a 5 mm to 50 mm wide, non-perforated fim region ( 20 ) remains, respectively, between the perforation and said window-shaped openings. 
     
     
         10 . The method according to  claim 9 , wherein in the londitudinal sealed seams ( 6 ) punched cuts ( 11 ) are introduced which join at said perforation line ( 10 ).