Lid for packaging container and method of fabrication

摘要

Lid for a packaging container comprising an annular member of plastic, having an opening, engagement means adapted to cooperate with complementary engagement means provided on a container. An inner face is oriented toward the container, and an outer face opposite the inner face, and an annular support surface is on one of the inner face and outer face. A panel of plastic and molded separately from the annular member and comprises an inner face oriented toward the container, and an outer face opposite the inner face, one of the inner face and outer face of the panel being positioned on the annular support surface so as to form an overlapping portion to close at least partially the opening of the annular member. A welding joint is formed in the overlapping portion between the panel and the annular support surface to integrally fix the panel to the annular support surface.

主权项

1. Lid for a packaging container comprising:
an annular member of plastic material, having an opening, engagement means adapted to cooperate with complementary engagement means provided on a container, an inner face adapted to be oriented toward the container, an outer face opposite the inner face, and an annular support surface on one of the inner face and outer face, the annular surface being provided on first annular projection extending radially, defining a perimeter of the opening, the first annular projection comprising a peripheral band, and a plurality of tabs extending from the band toward the opening; a panel of plastic material and molded separately from the annular member and comprising an inner face adapted to be oriented toward the container, and an outer face opposite the inner face, a single one of the inner face and outer face of the panel being positioned on the annular support surface so as to form an overlapping portion and so as to close at least partially the opening of the annular member, while the other one of the inner face and outer face of the panel is free from contact with a remainder of the lid; and a welding joint in the overlapping portion between the panel, the peripheral band and the tabs to integrally fix the panel to the annular support surface solely by the welding joint between the single one of the inner face and outer face of the panel and the annular support surface.