AIRTIGHT STRUCTURE IN SPOUT USED FOR POUCH VESSEL

摘要

PURPOSE: Provided is an airtight structure in a spout used for a pouch vessel which keeps airtight power of an airtight part elastically by an auxiliary stopper and a stopper of a cover so that it keeps airtightness in spite of distance between the cover and the spout. CONSTITUTION: The airtight structure in the spout used for the pouch vessel comprises the parts of: the cover(200) which is assembled to the entrance(103) of the spout(100); an elastic inner airtight part(105) which is formed at the inner wall of the spout to keep certain angle inwardly; the auxiliary stopper(203) which is formed at the lower part of the stopper corresponding to the inner airtight part to place the inner airtight part to lower side elastically; and the stopper(205) which is formed at the lower part of the stopper corresponding to the inner airtight part to place the inner airtight part to outer side.