Multiwall bag with easy open and reclose

Abstract

A multiwall bag with an easy open and recloseable feature is disclosed. In an exemplary embodiment, a pinch bottom open mouth (PBOM) bag comprises a pinch closure at one end and a card tab for opening and reclosing the bag at an opposite open mouth end. The card includes a front wall and back wall with a three-ply label affixed to the back wall of the card and a tab which can be manipulated by a user for prying open the bag. The card is attached to a notch disposed horizontally along an inner ply of the bag. The notch is disposed parallel to the open end on an inner ply of the outer tube of the bag to make tearing away easier for a user of the bag. Additionally, gussets may be formed on the vertical sidewalls of the bag or on the bottom wall of the bag to make manufacture of the bag and filling of commodities easier.

What is claimed is:  
     
         1 . A multiwall bag of tubular form comprising: 
 an inner tube made of heat sealable material;    an outer tube made of non-heat sealable material having an open end and a closed end and a front wall and a back wall, said outer tube contiguous with the inner tube; and    a card extruding from the open end of said outer tube along the back wall;    whereby said card is adapted for opening and reclosing the bag.    
     
     
         2 . The multiwall bag of    claim 1    wherein said inner tube is made of plastic material.  
     
     
         3 . The multiwall bag of    claim 2    wherein said inner tube is made of polyethylene.  
     
     
         4 . The multiwall bag of    claim 1    wherein said outer tube is paper.  
     
     
         5 . The multiwall bag of    claim 1    wherein said outer tube comprises at least one ply.  
     
     
         6 . The multiwall bag of    claim 5    wherein said at least one ply is paper.  
     
     
         7 . The multiwall bag of    claim 6    wherein said at least one ply is kraft paper.  
     
     
         8 . The multiwall bag of    claim 1    wherein said card is made of paper.  
     
     
         9 . The multiwall bag of    claim 8    wherein said card is made of cardboard.  
     
     
         10 . The multiwall bag of    claim 1    wherein said card has a label.  
     
     
         11 . The multiwall bag of    claim 1     0  wherein said label is a three-ply label.  
     
     
         12 . The multiwall bag of    claim 11    wherein said three-ply label comprises: 
 an adhesive;  
 a mylar strip laid on said adhesive; and  
 a silicone release coating laid on said mylar strip.  
 
     
     
         13 . The multiwall bag of    claim 12    wherein said adhesive is step patterned.  
     
     
         14 . The multiwall bag of    claim 2    wherein said card has a tab with no applied adhesive.  
     
     
         15 . A pinch bottom open mouth bag comprising: 
 an inner tube made of heat sealable material;    an outer tube made of non-heat sealable material having an open end and a closed end and a front wall and a back wall, said outer tube contiguous with the inner tube; and    a card extruding from the open end of said outer tube along the back wall;    whereby said card is adapted for opening and reclosing the bag.    
     
     
         16 . The pinch bottom open mouth bag of    claim 15    wherein said inner tube is made of plastic material.  
     
     
         17 . The multiwall bag of    claim 16    wherein said inner tube is made of polyethylene.  
     
     
         18 . The multiwall bag of    claim 15    wherein said outer tube is paper.  
     
     
         19 . The multiwall bag of    claim 15    wherein said outer tube comprises at least one ply.  
     
     
         20 . The multiwall bag of    claim 19    wherein said at least one ply is paper.  
     
     
         21 . The multiwall bag of    claim 20    wherein the innermost of said at least one ply is kraft paper.  
     
     
         22 . The multiwall bag of    claim 15    wherein said card is made of paper.  
     
     
         23 . The multiwall bag of    claim 22    wherein said card is made of cardboard.  
     
     
         24 . The multiwall bag of    claim 15    wherein said card has a label.  
     
     
         25 . The multiwall bag of    claim 24    wherein said label is a three-ply label.  
     
     
         26 . The multiwall bag of    claim 25    wherein said three-ply label comprises: 
 an adhesive;  
 a mylar strip laid on said adhesive; and  
 a silicone release coating laid on said mylar strip.  
 
     
     
         27 . The multiwall bag of    claim 26    wherein said adhesive is step patterned.  
     
     
         28 . The multiwall bag of    claim 15    wherein said card has a tab with no applied adhesive.