Method for producing a packaging means and packaging means made of flexible material

Abstract

A method for producing a package made of a flexible material, in which a single flexible material web is folded longitudinally, and superposed layers of the folded material web are firmly bonded to one another. At least one section of the material web is constructed as a tubular piece, and individual gusset edges of the material web are at least partly cut. Tubular pieces of a predetermined length are cut from the material web, in the area of at least one opening of the tubular piece. The outer layers are turned over, and layers of the material located therebetween are shortened. A sealing element is applied to the ends of the shortened layers and brought in contact with one of the outer layers. The shortened ends are closed after re-turning the outer layers, and fixed to a respective outer layer. Predefined regions of superposed layers of the tubular piece are then firmly bonded to one another.

1 . A method for producing a packaging means made of a flexible material, comprising the following steps: 
 folding a single flexible material web in a longitudinal direction;    bonding superposed layers of the folded material web to one another, wherein at least one section of the material web is tubular in structure;    partially cutting individual gusset edges of the material web,    cutting a tubular piece of a predetermined length from the material web;    turning over outer layers in the area of at least one opening of the tubular piece;    shortening layers of the material located between the outer layers;    applying a sealing element to ends of the shortened layers;    bringing the shortened layers in contact with one of the outer layers;    turning the outer layers back to their starting position;    fixing the shortened layers to a respective outer layer; and    bonding predefined regions of superposed layers of the tubular piece to one another.    
   
   
       2 . The method according to  claim 1 , wherein the material web is folded so that its longitudinal sides are superposed in a lateral region of the folded material web.  
   
   
       3 . The method according to  claim 2 , wherein the superposed longitudinal sides of the folded material web are firmly bonded to one another during said step of bonding.  
   
   
       4 . The method according to  claim 3 , wherein the gusset edges in the lateral region of the material web are bonded to one another jointly with the superposed longitudinal sides over a predefined section of their extension.  
   
   
       5 . The method according to  claim 4 , wherein the step of partial cutting takes place along the bonded gusset edges.  
   
   
       6 . The method according to  claim 1 , wherein the step of cutting includes cutting open the gusset edges.  
   
   
       7 . The method according to  claim 1 , wherein during the step of cutting, the tubular piece is separated from the material web so that opened lateral regions are embodied as sections of different length from each other at respective ends of each tubular piece.  
   
   
       8 . The method according to  claim 7 , further comprising turning the separated tubular piece horizontally through about 90° for further processing.  
   
   
       9 . The method according to  claim 1 , wherein the outer layers are turned over at both tubular openings and the layers of material located therebetween are shortened.  
   
   
       10 . The method according to  claim 1 , wherein a separate sealing element is applied to each of the individual upper ends of the shortened layers.  
   
   
       11 . The method according  claim 1 , further comprising inserting a re-closure member between the outer layers of the tubular piece above the sealing element and bonding the re-closure element to an inner side of the outer layers.  
   
   
       12 . The method according to  claim 4 , wherein after the step of turning the outer layers back to their original position, the opened lateral regions of the superposed layers are firmly bonded to one another in an area of the tubular openings and then the outer layers at at least one of the tubular openings are firmly bonded to one another in an edge region.  
   
   
       13 . The method according to  claim 1 , wherein projecting material in a bottom region of the tubular piece is turned over and adhesively bonded to one of the outer layers.  
   
   
       14 . A package made of flexible material, comprising: 
 a front wall and a rear wall between which side gussets extending over sections of their side regions are arranged, said gussets being shortened in an upper region of the package, wherein the package has a gusset-free head region between the front and rear wall,    wherein an upper end of each side gusset is closed by a separate sealing element, which fixes the respective side gusset end at precisely one of the package walls.    
   
   
       15 . The package according to  claim 14 , wherein each sealing element is bonded to a respectively allocated side gusset and a respective packaging-means wall.  
   
   
       16 . The package according to  claim 14 , wherein at least one free end of each sealing element ends between and at a distance from edges of at least one side seam joining the front and rear wall to one another.  
   
   
       17 . The package according to  claim 14 , wherein each sealing element is a material strip.  
   
   
       18 . The package according to  claim 14 , further comprising a re-closure member arranged in the head region and above the sealing element.  
   
   
       19 . The package according to  claim 18 , wherein free ends of the re-closure member each end in the side seams and at a distance from outer edges of the side seams.  
   
   
       20 . The package according to  claim 18 , wherein the re-closure member is formed from interlocking members which correspond to one another.  
   
   
       21 . The package according to  claim 20 , wherein the individual interlocking members are assigned to a respective package wall.  
   
   
       22 . The package according to  claim 14 , wherein each side gusset is shortened an area near the head region and in a bottom region.  
   
   
       23 . The package according to  claim 14 , wherein the front wall and the rear wall are continuously firmly bonded to one another in a bottom region.  
   
   
       24 . The package according to  claim 23 , wherein the bottom region has two bonding lines running parallel to one another.  
   
   
       25 . The package according to  claim 23 , wherein the bottom region has at least one diagonal bonding line which bonds regions of a respective side gusset to a respective package wall.