A BACK FLOW PROTECTION DEVICE IN A TUBE

摘要

PURPOSE: A reverse-current preventing device for the contents in a tube is provided to offer convenience by discharging the contents easily without reverse-current of the contents. CONSTITUTION: A reverse-current preventing device for the contents in a tube includes a zipper unit installed at a constant interval in the tube. The zipper closes a section according to the size of the tube from an end on an opposite side of an inlet. The tube is sealed by the zipper when the contents are discharged successively while preventing the reverse-current of the contents.