Special receptacle or package – With pallet feature
Patent
1990-10-12
1991-06-25
Foster, Jimmy G.
Special receptacle or package
With pallet feature
206597, 383119, B65D 1900
Patent
active
050259253
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a flexible container for fluids, comprising a liquid-proof inner bag; a substantially cylindrical outer sack which surrounds the inner bag and the mantle surface of which is provided with channels for support pillars, said channels extending in parallel with the central line of the outer sack; and means for filling and emptying the container.
This type of containers known from the prior art are intended for the transport and storage of different kinds of fluids, such as liquids, viscous substances, and bulk goods. Such containers are usually manufactured in two sizes: five hundred litres and a thousand litres. The containers are disposable and they are transported to the user in folded position. Before filling, support pillars are inserted in the channels provided in the mantle surface of the outer sack, and the support pillars are fastened to a conventional pallet of wood, which makes the container easier to displace. The support pillars keep the container in upright position on the pallet.
The support pillars are mounted pivotably to the pallet by means of parallel metal shafts, which are secured to the pallet and extend through the support pillars. This way of mounting is used so as to reduce strains exerted on the support pillars on the pallet.
As mentioned above, the support pillars are positioned in channels provided in the mantle surface of the outer sack. The channels are formed by pockets open at the bottom and closed at the top. The pockets are formed by sewing elongated material strips onto the mantle surface of the outer sack, whereby the strips are sufficiently broad for the support pillars to be easily inserted into the space between the mantle of the outer sack and the material strip.
During transport, full containers are often exposed to variations in the transport velocity, whereby retardations in particular may be drastic. At retardation the fluid tends to continue its movement onwards more rapidly than the pallet, wherefore the support pillars swing onwards. The back portion of the sack is thereby lifted upwards along the backward support pillars, and the upper and lower surface of the sack takes an inclined position. The outer sack is thereby exposed to high strains especially at the upper ends of the forward support pillars, but to a certain extent also at the lower ends of the backward support pillars, which may result in breakage in the outer sack.
The object of the present invention is to provide a container in which the above-mentioned strains are considerably reduced as compared with containers known from the prior art. The container according to the invention is characterized in that an outer and an inner side wall of the channels have substantially the same dimension in the peripheral direction of the outer sack.
Channels formed in this way have the advantage that both side walls are strained when the container is filled, whereby they adhere to the support pillar. This results in great friction forces between the side walls of the channel and the support pillar so that strains caused by retardation will not focus on the upper end of the forward support pillars and on the lower end of the backward support pillars. Instead, they are distributed over the whole length of the support pillars. The disadvantageous spot load occurring in containers known from the prior art because the container is to some extent movable with respect to the support pillars is thereby avoided. As a result of the great friction forces between the support pillars and the channel wall, the container according to the invention is locked in place with respect to the support pillars, which prevents the back portion of the container from rising up on braking.
The channels according to the invention also have the advantage that they do not project from the mantle surface of the outer sack to such an extent as known channels. Therefore the channels are less exposed to shocks as prior channels.
According to a preferred embodiment, both channel walls are integral with the mantle of t
REFERENCES:
patent: 4165024 (1979-08-01), Oswalt et al.
patent: 4927037 (1990-05-01), Boots
Foster Jimmy G.
Hilliard Thomas P.
Oy Fluid-Bag Ab
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