Dispensing – Resilient wall – Nonmetallic
Patent
1999-02-03
1999-11-09
Derakshani, Philippe
Dispensing
Resilient wall
Nonmetallic
G01F 1100
Patent
active
059797100
DESCRIPTION:
BRIEF SUMMARY
SUMMARY OF THE INVENTION
The invention relates to a container for a small quantity, for instance a portion, of fluid material such as liquid, gas, paste or gel, wherein the container is adapted to reduce its volume through the exertion of external forces and the container is provided with a closure.
BACKGROUND OF THE INVENTION
Such containers are generally known, for instance in the form of tubs for condensed milk closed by means of aluminium foil.
Such prior art containers have the drawback that when the cover is removed there is a considerable chance of leakage and spillage.
From GB-A-1 114 691 is known a container for fluid material wherein the container is adapted to reduce its volume through the exertion of external forces.
This is a container which is costly in mass production.
BRIEF DESCRIPTION OF THE INVENTION
The object of the present invention is to provide a container which can be manufactured at lower cost.
This object is achieved in that the container comprises two walls which are each rigid at least on their edge and which are connected by a flexible wall.
These steps result in a simpler and therefore less expensive production process, for instance by using a moulding process for the rigid walls and possibly a part of the flexible walls, and subsequently applying a blow moulding or deep-draw process to form the flexible walls.
It will be apparent that the container is not only intended for liquids such as condensed milk or lemon squash but that it is also suitable for packaging gas, for instance gas as fuel for lighters, or for gel-like products such as mayonnaise, sauce for french fries, or for pastes such as glue.
The closure is preferably arranged on a discharge spout adjoining an edge.
This step has the advantage that the closure, which is usually formed by a removable or displaceable element, is formed together with a rigid wall or- if this latter is formed by a rigid edge-is formed together with a cover element arranged on the rigid edge.
According to another preferred step the discharge spout is provided with a closure to be removed manually from its position closing the discharge spout.
With this step the container is properly closed until shortly before use; the closure is not opened by external pressure on the container.
According to a preferred embodiment the edges of the rigid walls are each located substantially in a flat plane, which planes extend substantially parallel when a container is full. This embodiment combines a simple production process, as already known for instance in the case of condensed milk tubs, with the advantages of the invention. For this purpose the manufacturing process for the tubs has only to be adapted to the collapsibility of the side walls. This can be performed for instance by a blow moulding process.
Other attractive preferred embodiments are designated in the sub-claims.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will be elucidated hereinbelow with reference to the annexed drawings, in which:
FIG. 1 shows a perspective view of a first embodiment of the present invention;
FIG. 2 shows a perspective view of a second preferred embodiment of the present invention;
FIG. 3 is a perspective view of the embodiment shown in FIG. 2 of the present invention, but then in collapsed situation;
FIG. 4 is a perspective view of a variant of the embodiment shown in FIG. 2;
FIG. 5 is a perspective view of the variant shown in FIG. 4 in collapsed situation; and
FIG. 6 shows a cross sectional view of a third embodiment.
DETAILED DESCRIPTION OF THE INVENTION
The container 1 shown in FIG. 1 comprises a flat upper surface 2 and a lower surface not shown in the drawing. Both the upper surface 2 and the lower surface are sufficiently rigid for this application. The rigid upper surface 2 and the rigid lower surface are mutually connected on their edge by side walls 3 which allow of a large measure of flexibility. Side surfaces 3 are folded in concertina shape, wherein the folds 4 extend substantially parallel to the edges of the rigid surfaces.
Arra
REFERENCES:
patent: 2685316 (1954-08-01), Krasno
patent: 3412907 (1968-11-01), Faso
patent: 3580427 (1971-05-01), Clarke
patent: 4079111 (1978-03-01), Uhlig
patent: 4898306 (1990-02-01), Pardes
Willemsen Louis R. H. A.
Willemsen Michael G.
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