Pouch with a straw hole and method of manufacturing the same

Abstract

A pouch is provided with a straw hole based on a structure that does not cause problems when the contents is filled therein and which does not generate any pin holes in the side seal section. A structure is also provided that does not cause any trouble when used in an automatic filling machine and a method is provided for manufacturing the same. The pouch has a straw hole ( 2 ) for a straw to be inserted therein with the straw hole ( 2 ) back-sealed with a seal material ( 3 ) from the inside thereof. The seal material ( 3 ) covers the straw hole ( 2 ), and a portion of the seal material ( 2 ) is cut off from the seal material ( 2 ) with the size sufficient for heat-sealing a periphery of the straw hole ( 2 ). The method of manufacturing the pouch is such that after the straw hole ( 2 ) is punched out on a front-side film thereof, a seal tape ( 6 ) temporally punched is fed to the rear side of the front-side film. The seal tape ( 6 ) is pulled off to leave only the temporally sealed section there. The temporally sealed section is finally sealed. Then the normal bottom seal 9 a and side seal 8 a are applied and cutting is performed to provide a bag.

What is claimed is:  
     
         1 . A pouch with a straw hole for inserting a straw therein, the pouch comprising: 
 a pouch film with a straw hole;    a straw hole seal material for sealing the straw hole from the back side thereof, the seal material being cut to a size to sufficiently cover the straw hole and having a heat seal to the pouch film, the heat seal having a heat seal width around the straw hole and said size of said the seal material being slightly larger than the heat seal width around the straw hole.    
     
     
         2 . A method of manufacturing a pouch with a straw hole, the method comprising the steps of: 
 feeding a front-side film forming one face of the pouch and a back-side film forming another face thereof respectively from rolls;    punching straw holes on one of the two sheets of films;    feeding a seal material tape with holes and corresponding temporally punched portions, having a size slightly larger than that of the straw hole punched on one of the two sheets of films, to the rear side of the film with straw hole punched thereon;    temporally sealing the straw holes by aligning the temporally punched portion of the seal material tape with the straw hole; subsequently separating the seal material tape to leave only the portion temporally sealed over the straw hole and then finally sealing the temporally sealed section; and    finally sealing side portions and bottom portions of the front-side film and the back-side film and forming a pouch by cutting the central section between the side seal sections.    
     
     
         3 . The method of manufacturing a pouch with a straw hole according to  claim 2 , further comprising a step of inserting a folded bottom tape into a bottom side of the two sheets of films to provide a standing pouch.  
     
     
         4 . The method of manufacturing a pouch with a straw hole according to  claim 2 , further comprising the step of inserting a folded gazette tape along side seals of the two sheets of films to provide a gazette bag.