Receptacles – Receptacle having flexible – removable inner liner – Means for venting air trapped between the liner and its...
Patent
1993-12-27
1996-01-02
Castellano, Stephen J.
Receptacles
Receptacle having flexible, removable inner liner
Means for venting air trapped between the liner and its...
220601, 220661, B65D 9004
Patent
active
054800579
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a flexible container for fluids.
2. Discussion of the Prior Art
Flexible containers for fluids are known in which there is an outer substantially rigid container and an inner collapsible container for fluids. The inner collapsible container can be filled with fluid and the contents can be dispensed without the need for air to enter the inner container thereby to avoid oxidation and deterioration of the contents. Wine and other fluids are housed in what have become known as bag-in-box containers.
Containers are also known for industrial type application to package larger quantities of fluids. For example, bulk containers are used to hold in the order of 1000 liters of fluid or paste. In these containers there is often a pallet such as a wooden pallet or the like supporting an outer substantially cubular rigid container which may be made of metal, timber or cardboard for example. The inner collapsible container may be made of polymeric film such as polyethylene and may include several layers of film to provide strength and oxygen barrier characteristics as required.
Such containers may include an inlet towards the top through which fluids may be passed to the collapsible container and an outlet welded to a side wall of the collapsible container and including a spout to extend through an opening in a wall of the outer container and to which the contents can be dispensed. However, in larger containers of this type it has been found that leakage often occurs where the outlet spout is welded to the flexible container.
OBJECTS AND SUMMARY OF THE PRESENT INVENTION
Analysis of the problem has revealed that substantial forces are created at the weld due to the pressure caused by the contents of the flexible container particularly during transportation.
An object of the present invention is to minimize the risk of leakage in the manner outlined.
According to the present invention there is provided a collapsible container for fluids. The collapsible container is adapted to be housed in an outer substantially rigid container which includes a base for supporting the collapsible container, a plurality of side walls to support the collapsible container when filled and through one of those side walls an outlet opening. The rigid container may be supported on a pallet or the like as is known in the art and it may be made of timber, carboard, metal or other suitable material.
The collapsible container of the present invention may be made of any suitable film material or laminated films of material as is known in the art. A polypropylene or polyethylene film is particularly suitable for this purpose. The collapsible container is preferably shaped generally to correspond with the shape of the rigid container in which it is to be housed so that when full it will extend to and press against the walls of the rigid container to be supported thereby. Preferably the collapsible container is marginally greater in size than the rigid container to ensure that the collapsible container does not need itself to support the weight of the contents when in use.
The collapsible container may include a fluid inlet preferably on its upper wall and through which fluid may be passed into the collapsible container. The inlet may include an inlet spout to extend through an inlet opening in the collapsible container and an inlet flange by which the inlet spout may be joined to the collapsible container. An inlet cap may be provided by which the inlet spout may be closed or opened. This may include for example a screw threaded cap.
The inlet may be made of any suitable material. A suitable material is polyethylene. It is desirable that the material of the inlet spout and the material of the collapsible container be compatable for joining, preferably by a welding technique as is known in the art.
The collapsible container of the present invention includes an outlet means. The outlet means of the present invention includes an outlet spout which may extend through the ou
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patent: 5156295 (1995-10-01), Gordon et al.
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Castellano Stephen J.
Entapack Pty. Ltd
LandOfFree
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