| 摘要 |
904,078. Opening containers. PLASTIC PACKAGING Ltd. Oct. 20, 1959 [Dec. 3, 1958], No. 39042/58. Class 66. The wall of a thin walled fluid container 1 or permanent closure 4 therefor is formed with a protrusion 9, 10 having a corner, at its junction with the remainder of the wall, which is ruptured, Fig. 4, when the protrusion is pressed. The edge 3 of the closure 4 is heatsealed to the rim 2 of the container, both parts being of synthetic plastics material e.g. polystyrene. The protrusion may be formed, alternatively, in the base wall of the container which has a rim to protect the protrusion from unintentional pressure. In a modification the member 9, 10 projects inwards and has a tab attached so that it may be pulled out to rupture the container wall. Specification 904,079 is referred to. |
