| 摘要 |
A container of the kind comprising mating inner and outer wall parts of plastics material with a pre-printed paper insert (3) interposed therebetween, the outer plastics wall part being transparent, is characterised in that one, preferably the inner, plastics wall part (1) is formed with a mouth flange (7) having an undercut portion, and the other (outer) plastics wall part (2) is formed at its mouth with a projecting lip portion (9), the edge of which is adapted to snap into and through the undercut to provide a substantially airtight joint, and in that the bottom wall of at least one, preferably the outer, plastics wall part (11) acts as a membrane to cater for expansion of trapped air. Apparatus for manufacturing said one (inner) plastics wall part, characterized by a mould having an upstanding boss defining an undercut face, an annular clamping ring for clamping the heated plastics material over the boss, and an annular forming tool slidable within the clamping ring for movement towards the mould face to squeeze and mould the plastics material around the boss and to fill against the undercut face. Apparatus for separating stacks of the inner plastics wall parts for feeding them individually to a required station in assembly apparatus, comprises a suction plug mounted on a movable arm and adapted be lowered into the uppermost wall part of a stack, and a push rod carried by the plug for subsequently ejecting the separated wall part from the suction plug after the plug is raised and carried by the arm over said required station. <IMAGE> |
