Receptacles – Closures – Secondary closure within parameter of primary closure
Patent
1989-01-13
1990-06-12
Garbe, Stephen P.
Receptacles
Closures
Secondary closure within parameter of primary closure
220212, 220307, B65D 5118
Patent
active
049325493
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a circular cover for a bulk goods conditioning vat, comprising an exterior crown provided with an orifice and adapted to be affixed to an extreme edge of the vat, a rigid inner capsule adapted to be applied and affixed to this orifice so as to block it, and blocking means having hooks, positioned on the inner capsule and on the crown and engaging by elasticity to maintain the inner capsule in a blockage position on the crown in a manner so as to prevent a disengagement of the inner capsule under the effect of a force directed towards the exterior.
To close vats utilized for conditioning bulk goods present in the form of granules, powders, pastes or liquids, particularly for chemical products, food ingredients, plastic materials or glues, one frequently utilizes cylindrical or bulging vats whose one surface extremity is formed by a cover of the above type. These vats are often made of synthetic material, but can also be formed out of cardboard, metal or other materials The cover is affixed on the vat for transport and storage of the empty or full vat. Of course, it must be removed on the one hand for the filling and on the other hand for each removal of product in the vat, each time with a manipulation of the tightening collar guaranteeing the maintenance of the cover on the vat in a sealed manner, making it possible to assure good conditions of preservation of the products.
However, this type of closure of a vat has certain disadvantages, particularly within the framework of an automatic filling The tightening collar, which must be able to be opened and then subsequently closed manually, will not be able to be positioned except with difficulty by a machine, and this in a very costly manner and not really guaranteeing a sealed closure Once filled, the vat slightly deforms with respect to the empty state, such that the cover does not apply itself directly in the same manner in the two states. As a result, in most of the production lines where the products are placed in vats in an automatic manner, it is preferable to utilize covers made of two pieces comprising an exterior crown and a central inner capsule. The exterior crown being fixed in advance on the vat, the filling occurs through its orifice, which need only be subsequently blocked in a definitive manner by means of an inner capsule which one pushes simply into the orifice of the crown. Covers of this type, corresponding to the preamble of claim 1, are described in U.S. Pat. Nos. 3,127,064 and 3,907,157.
However, these known covers require the separate transport and storage of the inner capsules of the covers, as well as to introduce them separately in the vats in an automatic filling line, which complicates the organization of the conditioning line and increases its cost. Furthermore, as the inner liner is not in place on the cover before the filling, the vats remain open during all of their transport and their vacuum storage, such that they can become dirty or contaminated.
Consequently, the present invention aims to overcome these disadvantages by virtue of a cover that makes it possible to block a vat before its filling, then open it and automatically close the vat during its filling, all while assuring a proper sealing of the filled vat.
To this end, a the cover according to the invention is characterized in that the inner capsule and the crown comprise mutual a far sealing that maintains the inner capsule on the orifice of the crown in a removable manner, while permitting a disengagement of the inner capsule by a force directed towards the exterior of the vat, in a provisional position of the inner capsule where the blockage means are not engaged.
Preferably, in its provisional position, the inner capsule is positioned oppositely with respect to its blockage position. The inner capsule comprises preferably, at its periphery, an edge portion which is substantially flat, extending radially beyond the blockage means and cooperating with the sealing means.
In a first alternative, the sealing means comprise a continuo
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Garbe Stephen P.
Sofratube RCT, S.A.
Stucker Nova
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