摘要:
Device for the repeated opening and closing of an aperture in a cover of a container which cover is provided at its bottom side with a layer of plastics material, wherein a pouring member 20 of plastics material is provided with a flange 22 which is tightly connected to the plastics material layer 12 on the bottom side of the cover 10 and, at a distance from the upper side of the cover 10, with a bulge 30 which is surrounded by a tightly mounted closing member 28,60.