Receptacles – Receptacle having rigid – removable external jacket or casing
Patent
1993-11-18
2000-02-15
Castellano, Stephen
Receptacles
Receptacle having rigid, removable external jacket or casing
220 2387, 220668, 220 15, B65D 9004
Patent
active
06024237&
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a pallet container having a thin-walled plastic container for liquid or flowable substances, including a steel-mesh cage of horizontal and vertical rods tightly enclosing the plastic container, thus forming a support cage, and a floor pallet on which the plastic container is seated and to which the steel-mesh support cage is permanently attached.
A pallet container of this type, having a steel-mesh support cage for the inner, thin-walled plastic container is known from DE-B-30 39 635. The steel-mesh support cage is fastened to the floor pallet--a commercial pallet of wood, for example--by means of cramps, clamps or claws across the very bottom horizontal rod. The cramps or clamps may be nailed (riveted) or screwed to the top plate of the pallet.
Another pallet container that is well-known (EP-A-0 438 718) has the individual pallet elements of wood connected by flat steel elements across them at an suitable distance above them (for the use of the lifting forks of a forklift vehicle). The support cage, its very bottom includes a horizontal rod which is fastened to the floor pallet by means of sheet steel brackets welded to the flat steel elements.
The pallet containers must pass official approval procedures meeting certain quality criteria so that they can be used in industry. For example, internal pressure testing and drop testing from specific drop heights with the pallet containers filled are carried out. The most unfavourable case is a diagonal drop to the lower pallet face, where the bottom discharge valve of the inner plastic containers is located.
Drop testing of this type showed that the inner container, when it hits the ground, will attempt to shift against the floor pallet due to the kinetic energy; at the same time, the fastening brackets of the cage shell are torn off the floor pallet in other areas of the circumference also. Therefore, the fastening of the lower edge of the steel-mesh support cage to the pallet is a significant weak point. As the steel-mesh support cage is fixed only at a few points, the steel mesh is deformed and distorted very unevenly; part of the weldment joints at the mesh intersections will tear apart, and free rod ends may damage the thin-walled plastic container.
SUMMARY OF THE INVENTION
It is the objective of the present invention to eliminate the disadvantages of the prior constructions as described above and to provide a pallet container where improved fixing of steel mesh cage and plastic container to the floor pallet is given by simple means, and where higher drop heights are ensured showing a more uniform or reduced deformation of the steel mesh cage and floor pallet without damage to (leakage of) the inner container.
The present invention solves this problem by having, at each face of the floor pallet, at least one vertical rod of the steel-mesh support cage extended on each face of the floor pallet, the rod passing through a corresponding bore in the floor pallet, at least through the top plate, or through the top plate and the bottom plate of the floor pallet and being fitted with a heel on the underside of the top plate and the bottom plate respectively, and being firmly connected to the floor pallet and attached to it.
Due to the form-fit non-positive fastening of the steel-mesh support shell by means of the extended rods which pass through the pallets, secure fastening of the two components is ensured even for highest stresses involving elastic and partially plastic deformation of the steel-mesh rods. Tear-off of the steel-mesh shell fasteners from the pallet is prevented.
In one of the designs according to the present invention, the steel-mesh rods passed through the top plate and/or bottom plate of the floor pallet are provided with a thread at their bottom ends and firmly attached to the floor pallet from below by means of a washer and nut.
According to another design, the steel-mesh rods passed through the top plate and/or bottom plate of the floor pallet may be permanently welded or brazed to a met
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patent: 4921196 (1990-05-01), Rudko
patent: 4947988 (1990-08-01), Schutz
patent: 5058747 (1991-10-01), Decroix et al.
patent: 5110000 (1992-05-01), Nichols
Burgdorf Marten
Przytulla Dietmar
Castellano Stephen
Mauser-Werke GmbH
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