Plastic valve bag or valve bag which is coated with plastic on the inside, having a valve tube

摘要

The invention relates to a plastic valve bag or a valve bag coated with plastic on the inside, having a valve tube arranged between the one folded-in bottom corner and the adjacent folded-over side walls. The intention is for it to be possible for the valve tube to be fitted securely and easily onto the filling nozzle of the filling device, and reliable closure of the portion of the valve tube projecting out of the bag is to be guaranteed. For this purpose, the valve tube (11) consists of an inherently stiff layer of paper or metal foil (16) with a weldable plastic coating on the inside (17) and on the outside (18) in each case.