Patent ID: 9511904
Filing Date: 2016-12-06
CPC Classification: B65B,B65D

Claim Text:
1. A package bag having: a flexible main package bag body formed by fusion-joining a sealant layer of a packaging film of laminated structure including a base film layer and the sealant layer; and a one-way pouring nozzle having a self-sealing function formed by fusion-joining a portion around a pouring path of in-bag material to be packaged without a base end side, which is constructed by a planar laminated film having thin thickness comprising sealant layers on front-back both sides, wherein the one-way pouring nozzle is projected laterally from a side portion of the flexible main package bag body at an upper portion or a lower portion of the flexible main package bag body by fusion-joining an outer surface of a base end portion of the one-way pouring nozzle to the sealant layer existing on an inner surface of the side portion of the main package bag body, comprising: a projection portion of the packaging film extending continuously from front and back portions of the packaging film of the flexible main package bag body side portion, with which the whole one-way pouring nozzle is covered from both of a front surface side and a back surface side; and a tear-inducing flaw extending along a projection direction of the projection portion from the flexible main package bag body, the tear-inducing flaw positioned crossing the center in the projection direction of the one-way pouring nozzle, wherein the main package bag body is made to be opened at either one side of an upper end and a lower end.