Receptacles – Receptacle having flexible – removable inner liner – Means for venting air trapped between the liner and its...
Patent
1997-02-27
1998-09-15
Pollard, Steven M.
Receptacles
Receptacle having flexible, removable inner liner
Means for venting air trapped between the liner and its...
220453, 229 14, B65D 560
Patent
active
058067060
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention concerns a container which is made of a tubular material, which is meant for bulk goods, and which comprises at least an outer wall, a bottom portion and possibly a top portion.
BACKGROUND OF THE INVENTION
With respect to the prior art, reference is made to the publication EP 0,247,696, in which a container intended for bulk goods is described. The container comprises a tubular outer frame, which can be closed from both ends, and a tubular inner member. The circumferential measure of the tubular inner member is smaller than the circumferential measure of the outer frame of the container, and the difference between said circumferential measures is such that hollow spaces are formed in each corner of the tubular outer frame between the tubular outer frame and the tubular inner member. The tubular inner member is in contact with the tubular outer frame in at least four points placed circumferentially at a distance from one another. The tubular inner member has been fixed to the tubular outer frame from the contact points, and the height of the tubular inner member is 30% to 100% of the height of the tubular outer frame.
The above container in accordance with said EP Patent 0,247,696 is unfavorable in the sense that, when the container is filled with bulk goods, the lower portion of the container tends to expand, especially when the container is stacked. This phenomenon is highly intensive in particular when the container is made of a resilient material, such as a plastic film. This phenomenon results in inclined distortion of the filled package, which again deteriorates the stacking quality and handling quality of the packages. Even though, in principle, the package is not necessarily broken as a result of the expansion of the lower portion, there is a risk that, when such containers are loaded, adjacent containers may rub against each other and, thus, be even broken. Likewise, the use of such containers in modern automatic warehouses is impossible. If the top portion of the inner ring of such a prior-art container is not completely filled, i.e. the height of the inner ring is lower than the height of the outer ring, the result is that the top portion of the container can expand. Even though, in principle, expansion of the top portion of the container facilitates the stacking, the containers stacked one on top of the other, however, involve the risk that expansion of the top portion of the container results in a risk of falling over of the containers stacked one on top of the other.
OBJECTS AND SUMMARY OF THE INVENTION
The object of the present invention is to provide an improvement over the prior-art container constructions. It is a more specific object of the invention to provide a container in which the drawbacks present in the container in accordance with the EP Patent 0,247,696 have been eliminated.
It is a further object of the invention to provide a container construction by whose means transportation packages that have been manufactured by means of the methods in accordance with the Finnish Patents 90,331 and 91,954 can be given optimal handling and stacking properties.
The objectives of the invention are achieved by means of a container made of a tubular material, which container is characterized in that, in the interior of the container, a cylindrical reinforcement part has been fitted, which has been fixed to the container so that, at the same time, the cylindrical reinforcement part forms at least a part of the bottom of the container.
In a preferred embodiment of the invention, the cylindrical reinforcement part is, at the top end, higher than the filling height of the container, in which case the cylindrical reinforcement part is, at the same time, fitted to form at least a part of a possible top portion, if any, of the container.
The cylindrical reinforcement part has been fixed to the outer wall and to the bottom portion of the container. The fastening of the bottom portion can be favourably such that it just ensures that the cylindrical reinforcemen
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Pollard Steven M.
UPM-Kymmene Oy
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