Plastic bag with zipper

Abstract

A plastic bag 10 D with a zipper 5 on an inner surface of an upper opening portion 14 of a bag body composed of plastic films 11 and 12 , the zipper having a groove 7 and a protrusion 8 being engaging with and disengaging from each other. Both sides 13 and a bottom side 15 of the bag 10 D are fused, and cut-offs 35 are made at both sides in the upper portion 14 . With the zipper 5 , the upper portion 14 can be opened and closed, and the upper portion 14 can be wide open. Further, at least one heat fusable plastic sheet may be put between the films 11 and 12 , so that a plural number of chambers can be formed. Also, the films 11 and 12 may be fused along a vertical line, so that a plural number of chambers can be formed.

1 - 6 . (canceled)  
   
   
       7 . A plastic bag with a zipper on a inner surface of an upper opening portion of a bag body made of a plastic film, the zipper having a groove and a protrusion engaging with and disengaging from each other, wherein: 
 at least both sides of the bag body are fused or melted; and    the both sides of the bag body in the upper opening portion, where both sides of the zipper are located, are not fused.    
   
   
       8 . A plastic bag with a zipper on an inner surface of an upper opening portion of a bag body made of a plastic film, the zipper having a groove and a protrusion engaging with and disengaging from each other, wherein: 
 at least both sides of the bag body are fused or melted; and    cut-offs are made at the both sides of the bag body in the upper opening portion where the zipper is provided.    
   
   
       9 . A plastic bag according to  claim 7  wherein at least one heat fusable plastic sheet is placed between a front film and a back film composing the bag body, so that a plural number of chambers are formed.  
   
   
       10 . A plastic bag according to  claim 8 , wherein at least one heat fusable plastic sheet is placed between a front film and a back film composing the bag body, so that a plural number of chambers are formed.  
   
   
       11 . A plastic bag according to  claim 9 , wherein the heat fusable plastic sheet is a non woven fabric or a foam plastic sheet.  
   
   
       12 . A plastic bag according to  claim 10 , wherein the heat fusable plastic sheet is a non woven fabric or a foam plastic sheet.  
   
   
       13 . A plastic bag according to  claim 9 , wherein when the upper opening portion of the bag body is opened, an end portion of the heat fusable plastic near the upper opening portion is located above the zipper.  
   
   
       14 . A plastic bag according to  claim 10 , wherein when the upper opening portion of the bag body is opened, an end portion of the heat fusable plastic near the upper opening portion is located above the zipper.  
   
   
       15 . A plastic bag according to  claim 11 , wherein when the upper opening portion of the bag body is opened, an end portion of the heat fusable plastic near the upper opening portion is located above the zipper.  
   
   
       16 . A plastic bag according to  claim 12 , wherein when the upper opening portion of the bag body is opened, an end portion of the heat fusable plastic near the upper opening portion is located above the zipper.  
   
   
       17 . A plastic bag according to  claim 7 , wherein a front film and a back film composing the bag body are fused together along a vertical line, so that a plural number of chambers are formed.  
   
   
       18 . A plastic bag according to  claim 8 , wherein a front film and a back film composing the bag body are fused together along a vertical line, so that a plural number of chambers are formed.