Bare liner bulk bag

Abstract

A bare liner bulk bag and method of making the bare liner bulk bag uses a liner that is supported by a lifting system. The liner is configured to have an interior space to hold material. The lifting system includes at least one vertical strap, at least one horizontal strap and at least one bottom strap, which are connected to each other to define a volume into which the liner can be positioned without a woven fabric shell.

What is claimed is: 
     
         1 . A bare liner bulk bag comprising:
 a liner configured to have an interior space to hold material; and   a lifting system configured to support the liner, the lifting system comprising:
 at least one vertical strap; 
 at least one horizontal strap; and 
 at least one bottom strap, 
   wherein the at least one vertical strap, the at least one horizontal strap and the at least one bottom strap are connected to each other to define a volume into which the liner can be positioned without a woven fabric shell.   
     
     
         2 . The bare liner bulk bag of  claim 1  wherein the liner is coupled to the lifting system at one or more locations on the lifting system to secure the liner to the lifting system. 
     
     
         3 . The bare liner bulk bag of  claim 1  wherein the liner is made of multiple pieces of liner material, the multiple pieces of liner material being attached to each other via seal lines. 
     
     
         4 . The bare liner bulk bag of  claim 3  wherein the seal lines of the liner are glue seal lines or heat seal lines. 
     
     
         5 . The bare liner bulk bag  1  wherein the liner includes a top spout that is used to fill the liner with the material. 
     
     
         6 . The bare liner bulk bag of  claim 5  wherein the liner includes a bottom spout that is used to empty the liner of the material. 
     
     
         7 . The bare liner bulk bag of  claim 1  wherein the liner is made of pieces of flexible film that are attached to each other. 
     
     
         8 . The bare liner bulk bag of  claim 1  wherein the at least one vertical strap includes at least one angled vertical strap. 
     
     
         9 . The bare liner bulk bag of  claim 1  wherein the lifting system further includes lift straps that are attached to the at least one vertical strap. 
     
     
         10 . The bare liner bulk bag of  claim 9  further comprising a lift loop connected to each of the lift straps. 
     
     
         11 . The bare liner bulk bag of  claim 9  further comprising at least one stevedore strap connected to the lift straps. 
     
     
         12 . The bare liner bulk bag of  claim 1  wherein the lifting system further includes at least one stevedore strap attached to the at least one vertical strap. 
     
     
         13 . A method of making a bare liner bulk bag, the method comprising:
 forming a liner having an interior space to hold material; and   forming a lifting system configured to support the liner, including connecting at least one vertical strap, at least one horizontal strap and at least one bottom strap to each other to define a volume,   wherein the volume defined by the lifting system is used to place the liner in the lifting system without a woven fabric shell.   
     
     
         14 . The method of  claim 13  wherein the forming the liner includes coupling the liner to the lifting system at one or more locations on the lifting system to secure the liner to the lifting system. 
     
     
         15 . The method of  claim 13  wherein the forming the liner includes attaching multiple pieces of liner material to each other using a sealing process. 
     
     
         16 . The method of  claim 15  wherein the attaching the multiple pieces of liner material to each other includes glue sealing or heat sealing the multiple pieces of liner material to each other to form the liner. 
     
     
         17 . The method of  claim 13  wherein the forming the liner includes forming a top spout that is used to fill the liner with the material or a bottom spout that is used to empty the liner of the material. 
     
     
         18 . The method of  claim 13  wherein the at least one vertical strap includes at least one angled vertical strap. 
     
     
         19 . The method of  claim 13  wherein the lifting system further includes lift straps that are attached to the at least one vertical strap. 
     
     
         20 . The method of  claim 13  wherein the lifting system further includes at least one stevedore strap attached to the at least one vertical strap.