"Improved Design For Stabilizing Fabric Bulk Bags"

Abstract

An improved bulk bag with an upper portion of the sidewalls that is sloped inward from vertical so that when the fabric is stretched upward in the lifting process, thereby creating tension in the vertical fabric, the tension will be maintained after the bag is no longer in a lift position, as the fabric cannot slide back down around the product due to the restricted size of the fabric and such tension provides stronger restrictions to product movement to provide increased stability.

1 . An improved fabric bulk bag of the type having sidewalls, whereby a dart is formed along an upper portion of at least one of the sidewalls to define an area of a reduced diameter than the portion of the bag sidewalls below the dart, so that when product is placed into the bag to a point above the lower portion of the dart formed in the bag sidewalls, the portion of the sidewalls below the dart are maintained in tension, which provides for a more stable bag which is capable of supporting itself and other filled bags positioned thereupon. 
   
   
       2 . The bulk bag in  claim 1 , wherein the darts formed on the sidewalls may be angled from the bottom portion to the top portion. 
   
   
       3 . The bulk bag in  claim 1 , wherein the angled portion of the bag, defined by the dart, commences on the sidewall around 14 to 15 inches from the top of the bag and terminates at a point around 5 inches from vertical along the horizontal top of the bag. 
   
   
       4 . The bulk bag in  claim 1 , wherein as pressure is applied from above by a second bag stacked on top of a first bag, the pressure meets the floor and then turns 90 degrees toward the side walls of the bag, defining a redirection of pressure through out the entire bag, including the angled portion of the bag. 
   
   
       5 . The bulk bag in  claim 1 , wherein there would be provided one or more darts at at least one or more corners of the bag. 
   
   
       6 . The bulk bag in  claim 1 , wherein there would be provided one or more darts along at least one or more sidewalls of the bag. 
   
   
       7 . An improved bulk bag of the type having sidewalls, whereby one or more darts on the upper portion of the bag sidewalls define an area a reduced diameter than the lower portion of the bag sidewalls, so that when product is placed into the bag to a point above the lower portion of the bag sidewalls, the sidewalls are maintained in tension, which provides for a more stable bag which is capable of supporting itself and other filled bags positioned thereupon. 
   
   
       8 . An improved fabric bulk bag design which allows more stable stacking of multiple bags filled with product, the bag comprising:
 a. sidewalls, a top portion and a bottom portion, all defining a bulk space therewithin;   b. a lower portion of the sidewalls extending vertically upward from the bottom portion;   c. a dart formed on at least an upper portion of the sidewalls from the vertical lower portion of the sidewalls, so as to define an angled truncated top portion of the bag;   d. the product contained within the bag to a point above the lowest point of the dart, which results in the entire sidewalls remaining in tension.   
   
   
       9 . The improved bag design in  claim 8 , wherein when the side directed pressure hits the angled portion of the bag, caused by product within the bag, or another filled bag stacked upon it, there is provided a lift which stabilizes the lower bag. 
   
   
       10 . The improved bag design in  claim 8 , wherein the dart in the sidewalls define a means for maintaining the fabric of the sidewalls in tension at all times, preventing the fabric from slipping down around the product in the bag. 
   
   
       11 . The improved bag design in  claim 8 , wherein the darts formed in the sidewalls define an upper surface when filled with product capable of supporting another filled bag thereupon. 
   
   
       12 . An improved bulk bag of the type having sidewalls, which provides for a more stable bag which is capable of supporting itself and other filled bags positioned thereupon, which comprises an upper portion of the bag sidewalls having a dart formed therein so as to define a reduced circumference of the filled bag at the darts, so that when product is placed into the bag to a point above the darts, the sidewalls are maintained in tension. 
   
   
       13 . An improved fabric bulk bag, comprising:
 a. sidewalls, a top portion and a bottom portion, all defining a bulk space therewithin;   b. a lower portion of the sidewalls being substantially vertical;   c. an upper portion of the sidewalls having a dart in place, which defines that portion of the sidewall formed inwardly from the vertical portion of the sidewalls, so that when product is poured into the bag at least to a level above the lowest point of the dart, the lower portion of the sidewalls remain vertical and rigid when placed on a surface or when other filled bags are stacked thereupon.   
   
   
       14 . An improved bulk bag with an upper portion of the sidewalls that is sloped inward from vertical defining a reduced area of the bag sidewalls, so that when the sidewall fabric is stretched upward in the lifting process, creating tension in the vertical fabric, tension will be maintained as the fabric in the reduced area cannot slide back down around the product due to the reduced area of the fabric compared to the product surface area. 
   
   
       15 . The improved bulk bag in  claim 14 , wherein the upper portion of the sidewalls are sloped inward as a result of one or more darts formed in the upper portion of the sidewalls so that the product maintains the fabric in its full vertical position when the bag contains product to a level at least above the lowest point of the one or more darts. 
   
   
       16 . The improved bulk bag in  claim 15 , wherein one or more of the darts may be formed at the corners of the bulk bag or along the sidewalls of the bulk bag. 
   
   
       17 . An improved bulk bag with an upper portion of the sidewalls that is sloped inward from the vertical so that when the fabric is stretched upward in the lifting process, thereby creating tension in the vertical fabrics, that at least a portion of the tension will be maintained as the fabric cannot slide back down around the product due to the restricted size of the fabric. 
   
   
       18 . The improved bulk bag in  claim 17 , wherein the upper portion of the sidewalls are sloped inward by the use of one or more darts formed at one or more corners or along one or more sidewalls of the bag to provide increased stability. 
   
   
       19 . The improved bulk bag in  claim 18 , wherein the darts define a means to create tension in the vertical fabrics when the filled bag is lifted, so that at least a portion of the tension will be maintained after the bag is no longer in a lift position, as the fabric cannot slide back down around the product due to the restricted size of the fabric and such tension provides stronger restrictions to product movement to provide increased stability. 
   
   
       20 . An improved fabric bulk bag design which allows more stable stacking of multiple bags filled with product, the bag comprising:
 a. sidewalls, a top portion and a bottom portion, all defining a bulk space therewithin;   b. at least an upper portion of the sidewalls formed inwardly from the vertical by the use of one or more darts along the sidewalls, so as to define an angled truncated top portion of the bag;   c. wherein as pressure is applied from above by a second bag stacked on top of a first bag, the pressure meets the floor and then turns  90  degrees toward the side walls of the bag, defining a redirection of pressure through out the entire bag, including the angled portion of the bag.