Stand-up bag of a heat-sealable plastic film for flowable products

Abstract

A stand-up bag of heat-sealable plastic film comprising two opposing side walls ( 1,2 ) sealed together along side seams ( 5, 6 ) and a bottom wall ( 4 ) folded inwards into V-shape and sealed to the first and the second side wall along transverse bottom seams ( 7,8 ) and along bottom side seams ( 9, 10 ). The bag further comprises a top wall ( 3 ) folded inwards into V-shape and sealed to the side wall in the same manner as the bottom wall ( 4 ). However, the top wall ( 3 ) and one of the side walls jointly form a projecting discharge spout ( 19 ) having a discharge passage ( 20 ), which is closed by a removable end portion ( 24 ) and sideways defined by spout side seams ( 21, 22 ).

1 . A stand-up bag of a heat-sealable plastic film for flowable products, said bag comprising: 
 a first and a second opposing side wall ( 1 , 2 ) being interconnected along two side seams ( 5 , 6 ),    a bottom wall ( 4 ) folded inwards into V-shape and having with two bottom wall panels ( 4   a,   4   b ) connected to the first and the second side wall, respectively, along transverse bottom connections ( 7 , 8 ) and along bottom side seams ( 34 - 36 ),    a top wall ( 3 ) folded inwards into V-shape and having with a first top wall panel ( 3   a ) connected to the first side wall ( 1 ) and a second top wall panel ( 3   b ) connected to the second side wall ( 2 ) along top side seams ( 15 , 16 ), the first top wall panel ( 3   a ) further connected to the first side wall ( 1 ) along a transverse top connection ( 11 ) and the second top wall panel ( 3   b ) and the second side wall ( 2 ) further extending beyond the transverse top connection ( 11 ) and sealed together to form a discharge spout ( 19 ; 39 ; 59 ) having a discharge passage ( 20 ; 40 ; 60 ) closed by the means of a removable end portion ( 24 ,  44 ,  64 ) and sideways defined by spout side seams ( 21 ,  22 ;  41 ,  42 ;  61 ,  62 ), characterised in that after removal of the removable end portion ( 24 ; 44 ; 64 ) the discharge spout ( 19 ; 39 ; 59 ) has an outer width (B) of less than or equal to 50 mm at least in the spout discharge portion ( 27 ) provided by removing the removable end portion.    
     
     
         2 . A bag according to  claim 1 , characterised in that the outer width (B) of the discharge spout ( 19 ;  39 ;  59 ) is less than 40 mm, preferably less than 30 mm and most preferably less than 25 mm, at least in the spout discharge portion provided by removing the removable portion.  
     
     
         3 . A bag according to  claim 1  or  2 , characterised in that the interior distance (B E ) between the spout side seams ( 21 ,  22 ;  41 ,  42 ;  61 ,  62 ) is less than or equal to 30 mm, preferably less than or equal to 20 mm and most preferably less than or equal to 15 mm, at least in area defining the effective flow area of the discharge passage ( 19 ;  39 ;  59 ).  
     
     
         4 . A bag according to  claim 3 , characterised in that the width of the discharge passage ( 20 ; 40 ; 60 ) is such that the parts of the second top wall panel ( 3   b ) and the second side wall ( 2 ), respectively, forming the spout abut each other for closing the passage so as to prevent a liquid contained in the container and having a viscosity corresponding to the viscosity of water substantially from flowing out through the spout when the bag rests on the second side wall ( 2 ) after the removal of the removable end portion.  
     
     
         5 . A bag according to  claim 4 , characterised in that the discharge passage ( 20 ; 40 ; 60 ) has such a width that in order to make the liquid contained in the container flow out through the discharge passage, a certain amount of pressure has to be applied on the liquid product in the bag by squeezing the bag.  
     
     
         6 . A bag according to one or more of the preceding claims, characterised in that the spout side seams ( 21 ,  22 ) extend substantially parallel to each other.  
     
     
         7 . A bag according to one or more of the claims  1 - 5 , characterised in that the spout side seams ( 41 ,  42 ) extend in a substantially converging manner when seen in outward direction.  
     
     
         8 . A bag according to one or more of the claims  1 - 5 , characterised in that the spout side seams ( 61 ,  62 ) extend in a substantially diverging manner when seen in outward direction.  
     
     
         9 . A bag according to one or more of the preceding claims, characterised in that it has an interior volume less than or equal to one litre.  
     
     
         10 . A prefabricated bag for the manufacture of a bag according to one or more of the preceding claims, characterised in that one of the side seams ( 6 ) has an unsealed area ( 30 ) between the V-fold ( 13 ) of the bottom wall ( 4 ) and the V-fold ( 14 ) of the top wall ( 3 ) so as to provide an opening ( 33 ) in which a filling tube is inserted for filling the prefabricated bag.