subject: Moulded cap with a gasket [print this page] The cap mould according to the present invention can be integrally formed with a simple mould provided with a plurality of protrusions on the mould for forming an outer shape of the cap. Each protrusion is formed in a complementary shape with the shape of the vertical hole. Since the protrusion extends straight in a vertical direction, the cap having an undercut can be removed from the mould by simply translating the mould straight in the vertical direction or ejecting the moulded cap in the vertical direction. When the gasket is mounted on the moulded cap, the ears thereof are supported on the shelves formed in the skirt near the boundary region between the top wall and the skirt of the cap. The ears are held on the shelves by the self-sustaining shape of the gasket or friction between the surfaces of the ears and the shelves, whereby falling of the gasket is prevented. Further, since the ears can be observed through the vertical holes from outside, the presence of the gasket and whether the spout is sealed or not can be checked by looking into the vertical holes without actually removing the cap mould from the spout.
