Receptacles – End wall structure – Having an outlet or inlet opening
Patent
1992-08-11
1999-11-02
Castellano, Stephen
Receptacles
End wall structure
Having an outlet or inlet opening
B65D 640
Patent
active
059753382
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a bung barrel of thermoplastic synthetic material, having a circumferential carrying and transporting ring disposed on the barrel wall in the vicinity of the upper end and having at least one bung hole socket located in the edge region of the upper end, which bung hole socket is sunk into a bung hole housing so that the end face of the bung hole socket terminates flush with or slightly below the outer surface of the upper end.
Plastics drums of this kind having at least one gripping ring for a barrel grip located at the upper circumferential region of the drum wall and optionally additional rolling rings on the periphery of the drum, are generally known. Plastics bung barrels may be manufactured by various methods. According to one manufacturing option, the drum is made in one piece with drum ends and carrying and transporting rings using the blow-moulding process, the carrying and transporting rings being upset by means of movable mould slides while still in the blow mould (for example DE-PS 29 14 938). According to another method variant, the cylindrical body of the drum and the drum ends with carrying and transporting rings and/or rolling rings are preproduced separately as individual components and are then welded or glued together (for example U.S. Pat. No. 3,394,747). It is also already known to preproduce only the carrying and transporting rings as separate individual components and to then weld them or glue them to the blow-moulded body of the drum.
In a further known plastics bung barrel, the upper end with carrying and transporting ring is screwed onto the wall of the drum as a detachable individual component (for example U.S. Pat. No. 4,094,432). The plastics drum may however also be formed as a wide-necked container with detachable bung hole lid and clamping ring closure.
All known plastics barrels having an upper carrying and transporting ring have however the common disadvantage that because of the bung hole socket and/or the bung hole housing being sunk into the upper end of the drum, problems arise when emptying a residue from drums of this kind. The residue emptying achievable by manually rocking the barrel to and fro in a slopingly tilted inverted position is also unsatisfactory, even when the drum is held in such a manner that the bung hole occupies the lowest possible position.
It is an object of the present invention to provide a constructional embodiment of a plastics bung barrel and/or of its upper end (lid), which facilitates the most complete emptying of residue possible, in a stationary sloping position (without rocking to and fro).
This object is achieved according to the invention for a plastics drum of the type initially described in that the upper end has a substantially segmentally-shaped surface portion or a flat slope, which is formed symmetrically with respect to the bung hole socket on both sides and, when seen in the normal position of the barrel, is set back in a flat sloping manner extending in the direction of the edge of the barrel and sloping inwardly into the body of the barrel, the slope having its lowest point at the side of the shell of the barrel in the vicinity of the bung hole socket and there running into the lower-lying plane of the bung hole housing base or into the bung hole socket. As the upper end is not formed to be uniformly flat, but rather has the slope which is fundamental to the invention in the region of the bung hole, when emptying a residue and the barrel is in an inverted disposition at a slightly tilted but stationary inclined disposition of the barrel of, for example, 10.degree. to 12.degree., the residual liquid flows on the inside of the flattened portion towards the barrel wall to the bung hole housing and out of the barrel through the bung hole socket.
In a preferred embodiment of the invention, it is provided that the slope defines a flat bent edge with the remainder of the upper end of the barrel, the average distance of which from the centre of the barrel is approximately equal to or less than one-quarter of t
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Burgdorf Marten
Przytulla Dietmar
Castellano Stephen
Mauser-Werke GmbH
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