Abstract: A method of making a wall of a container which wall is to be ruptured to gain access to the interior of the container, the method comprising forming a weakening in the wall corresponding to the path along which the wall is to be ruptured, locating the wall between mould tools which are formed as to one of them with a bead recess which will overlie the weakening and as to the other with a rupture recess in register with the bead recess, injecting material into the bead recess to displace the wall regions adjacent the path into the rupture recess to further weaken the connection between the wall parts to either side of the said path, and to form a seal therebetween and removing the wall from the tools.

Abstract: A machine for making a composite article including a sheet material blank and an injection moulding thereon, comprises first and second cavity tools which are relatively movable between open and closed conditions and in the latter define a cavity, and a core tool movable relative to the cavity tools between open and closed conditions in the latter of which the core tool and first cavity tool together define a blank receiving cavity and the core and first and second cavity tools together define a mould cavity, the second cavity tool lying between the first cavity tool and the core tool when the tools are in open condition and supporting guide means for guiding a blank falling under gravity from a blank magazine to a position in the path of relative movement tools and between the core tool and the second cavity tool when the tools are in open condition, stop means on the core tool extending into the guide means to support a blank therein above the tools when the tools are in closed condition and to permit the b

Abstract: Apparatus for making a container for example a frusto-conical container from a blank having an end panel and side panels, the apparatus having a cavity tool and a core between the blank can be clamped in the form which it takes in the finished article, and a blank positioning member movable relative to the tools which, as the tools move toward a closed condition to clamp the blank will engage a free edge of the blank already in its final axial position in the cavity tool to correctly position that edge before the tools reach the closed condition.

Abstract: A container with a closure, the container and closure being engageable by relative rotation, locking means on the container and closure which allow the closure to be rotated in the direction required to apply the closure but not in the opposite sense, the locking means on one of the container and closure being formed as a tear band so as to unlock the pair of locking means and allow removal and replacement of the closure.

Abstract: Apparatus for making a frusto-conical container from a blank having a base panel and side panels which are folded relative to the base, clamped between tools of an injection moulding machine and seamed by injected material fed along one face of the blank, the other faces of the side panels spanning a circumferential channel into which they are forced by injected material to form a circumferential bead, at the axial seams the channel being reduced in depth to support the side panels against displacement of the edges by injected material such as will allow injected material to reach that face of the blank nearest the channel.

Abstract: Apparatus for making a container by means of a blank which is seamed along two opposite edges when these are juxtaposed includes a cavity tool and a core tool which move from an open to a closed condition to clamp a blank in its final shape whereupon material can be injected to seam the juxtaposed edges, the blank being movable into the cavity tool through a passage extending from the cavity through a wall of the cavity tool by blank drive means and an obturator being provided to close the passage and complete the internal surface of the cavity tool.

Abstract: An injection moulding machine to make a container from a blank which has an end panel and side panels hinged to the end panel, the machine includes guide means which position edges of the side panels as they are folded relative to the end panel and positioned around the core tool during closing movement of the tools.

Abstract: A composite product and a method of making the product, the product being a central panel of flexible sheet material having a peripheral molding of plastics bonded to the margin of the panel, the arrangement being such that the margin of the panel is deformed to define two marginal parts displaced out of the plane of the central part of the panel, the moulding extending across the junction of the two marginal parts with each other but stopping short of the junction of the inner marginal part with the central part so that the blank at that junction is free to unwind, i.e. return to the flat and any bowing of the blank, which being uniform as to direction, is substantially less than would be the case were the moulding to cover both junctions.

Abstract: A method of making a container, particularly a rectangular tray-like container, in which a blank is provided having side panels which are displaced to form the side walls of the container. The blank is clamped in its container - forming shape between mould tools with adjacent ends of the side panels juxtaposed end corner seams and a lip are injection moulded to seam the side panels and form a peripheral lip on the free edges of the side panels remote from the base panel. The mould tools shape the free edges of the side panels to an internally concave form between the juxtaposed side panel ends before moulding so that shrinkage of the moulding will accentuate the concavity to give a predetermined consistent shape to containers so produced and avoid unpredictable buckling and deformity.

Abstract: Apparatus for making a composite container comprising a blank and an injection moulding thereon, the apparatus comprises a pair of tools relatively movable between open and closed conditions in the latter of which they define a mould cavity for receiving a blank and injected mouldable material, and a pair of guides for holding a blank between the tools in their open condition, the blank being positioned to be engaged by one tool in its movement to the closed tool condition between the guides, the guides being insufficiently spaced apart to allow said movement of the one tool in their guiding condition, wherein each guide in the region of movement of the one tool therebetween includes a member movable between an operative guiding position and an inoperative position permitting said movement of the one tool by relative movement of the one tool and the guides.

Abstract: In making a frusto-conical container from a blank which is seamed at juxtaposed edges by injection molding, the resiliency of the material arising from compression at the concave face on bending the blank is reduced by deforming the material in that face by means of the tools between which the blank is clamped for the injection molding. Thereby the strain on the seam and tendency to go out of shape due to the resilience are reduced.

Abstract: A container is made by folding a blank to define a receptacle, clamping the blank between a core tool and a cavity tool and seaming juxtaposed blank edges by injection moulding, one tool defining a recess overlying the juxtaposed edges and at least one preferred flow path being defined in that recess offset relative to the juxtaposed edges so that injected material clamps the edge region over which the preferred flow path lies against the other tool face opposite the recess to prevent injected material penetrating between the blank over which the preferred flow path lies and that other tool face.

Abstract: A composite product made of a blank of e.g. paper, card, plastics or metal foil, and a peripheral injection moulding of synthetic plastics material, formed on the periphery of the blank. The blank is formed adjacent its periphery to form a channel in which the inner region of the moulding engages the outer region extending from the inner region in the direction in which the internal surfaces of the channel face. Shrinkage of the moulding will tend to cause the blank to bow in the direction in which the channel faces.

Abstract: A composite product such as a lid for a container comprises a sheet material blank and a peripheral moulding formed thereon, wherein a marginal portion of the blank is displaced to project from the general plane of the central panel of the blank and the peripheral moulding includes an inner marginal portion bonded to the said marginal portion of the blank and is shaped so that on longitudinal shrinkage of the moulding the central panel of the blank will bow in a direction conforming with the direction of displacement of the marginal portion of the blank.

Abstract: The invention is concerned with a method for making an article such as a container having a circular end wall and a side wall folded from the arcuate edge of the end wall, the article being first formed as a flat blank having two panels conforming to the base and side walls, the peripheries of the panels intersecting each other with a slit being formed in the common intersecting portions to form a pair of hinges at the ends of the slit enabling one panel to be folded upwardly with respect to the other between two mold tools without rupturing the hinges, plastic material being injected into the mold to join the folded panels into a unitary container or similar article.