A PLASTICS CONTAINER ASSEMBLY A PLASTICS CONTAINER ASSEMBLY

摘要

A plastic container assembly has a tubular wall (1) and a bottom end cap (2) fitted thereto to form a base. The wall (1) has an internal flexible and integral peripheral sealing flange (7) which is displaced by abutment with a closure wall (2a) during fitting of the end cap to the side wall so that an annular rib (8) on the cap snap engages with an annular groove (5) in the side wall. A flange (12) on the bottom cap overlies the bottom end of the side wall (3) and may be permanently bonded thereto by welding. The flange (7) presents a smoothly curved concave profile (13) and provides a smooth transition (14) with the closure wall (2a). Fluid seals are provided by abutting surfaces between the rib (8) and groove (5), between the flange (12) and bottom of the wall (1) and between the sealing flange (7) and wall (2a). In a modification the annular rib is located on the wall (1) to snap engage with an annular groove in the cap (2) and the sealing flange (7) is omitted so that the smoothly curved concave profile is formed by an upward extension wall of the bottom cap (2).