Spout assembly and method of manufacturing packaging bag provided with spout assembly

A spout assembly mounted to a bag body having an inner content accommodated therein and configured to discharge the inner content filling the bag body, the spout assembly comprising:

• a check valve housed within the spout assembly configured for permitting the inner content to flow only from a bag body side to a mouth portion side of the bag body, the check valve including a spool to move along an axial direction of the spout assembly;
• and
• an urging member having an outer peripheral surface fixed to an inner peripheral surface of the spout assembly and configured to urge the spool toward the bag body side,
• the urging member being formed with a seat surface for the spool urged by the urging member to abut against the seat surface, and
• the urging member configured to press the spool against the seat surface to thereby shut off flowing of the inner content inside the spout assembly, and when an inner pressure inside the bag body or a suction force from the mouth portion reaches a predetermined value, the spool is separated from the seat surface against an urging force of the urging member, thereby permitting the inner content to flow from the bag body side to the mouth portion side,
• wherein the urging member includes a fixing portion for fixing the urging member in the spout assembly, the fixing portion including a drip preventing portion to prevent, from dripping down, an inner content taken out of the bag body and remaining to the end portion of the spout assembly,
• wherein the drip preventing portion projects from the end of the spout assembly, having an inner surface widened toward an outside in the axial direction of the spout assembly, and
• wherein the seat surface is formed to the inner peripheral surface of the drip preventing portion, and the valve body abuts against the seat surface for shutting off the flowing of the inner content inside the spout assembly.