US20100282827A1

US20100282827A1 - Cardboard tank packaging

Info

Publication number: US20100282827A1
Application number: US12/730,997
Authority: US
Inventors: Mario PADOVANI
Original assignee: CARTONIFICIO FIORENTINO SpA
Current assignee: CARTONIFICIO FIORENTINO SpA
Priority date: 2009-05-11
Filing date: 2010-03-24
Publication date: 2010-11-11
Also published as: IT1393915B1; ITFI20090098A1; EP2251272A1

Abstract

A tank pack comprising a box-shaped body with a bottom and defining a housing, made from cardboard, and a sack made from plastic for containing liquids, purees or similar products suitable for being housed in the housing is described. The sack is provided with at least one outlet valve and one inlet valve. The outlet valve is connected to a cardboard support base of the sack that comprises a base sheet suitable for being arranged laying over the bottom. A front wall of the body is provided with an opening to externally expose the outlet valve. The support also comprises a front sheet foldably connected to the base sheet. Anchoring means are provided for the outlet valve and suitable for internally laying over the front wall of the body. A manipulation and fastening flap is foldably connected to the front sheet so as to be accessible near or at the upper end of the body.

Description

CROSS REFERENCE TO RELATED APPLICATIONS

The present application claims priority to Italian Patent Application No. FI2009A000098, filed on May 11, 2009, which is incorporated herein in its entirety.

FIELD

The present disclosure concerns the field of the production of containers made from paper-based material, and more specifically it concerns a new tank packaging intended for storing and transporting liquid or viscous materials in the field of agri-foodstuffs and chemicals, such as in particular, but not exclusively, preserves, mashed substances etc.

BACKGROUND

Cardboard tank packagings are known and highly appreciated due to their biodegradability and ease of recycling. The parallelepiped shape allows the transportation and storage logistics to be optimized. The packaging comprises an outer body made from cardboard of suitable strength, which houses a collapsible sack made from plastic intended for containing liquids. The sack is supported by a cardboard base that is inserted into the outer body for internally superimposing the bottom of the body. The base and the sack are fixedly connected to one another by an outlet valve for the outlet of the liquid from the sack. Said valve, when arranging the sack with the relative base inside the body, has to be placed in correspondence with a preformed opening on a side wall of the body, near to the bottom. In addition to the outlet valve, the sack includes a filling valve, in an opposite position to the outlet valve.
Such known packagings have two main types of drawbacks. Firstly, the arrangement of the sack with its support base in the body is very difficult and troublesome, in particular as far as the control of the correct positioning of the valve is concerned, working from outside of the body. Regarding this, it is worth remembering that the body has very high side walls, for which reason the arms of a worker cannot reach the area of the bottom inside the body, and they are also hindered by the presence of the sack. Secondly, when the sack is progressively emptied of its content, and consequently collapses in the body, the folds form pockets that trap the material, preventing complete emptying unless a part of the sack is lifted manually, inserting the arm inside the body, with the difficulties already mentioned for the operator.

SUMMARY

According to the present disclosure, a new tank packaging that, thanks to original constructive features, is easier to assemble and more user-friendly and safe in use than analogous known packagings.
According to a first aspect, a tank-like packaging comprising a box-shaped body made of cardboard with a bottom and defining a housing, and a sack made of plastic material is provided, the sack being adapted to be housed in said housing and comprising at least one outlet valve and at least one inlet valve, said outlet valve being connected to a sack support, made of cardboard and comprising a base sheet adapted to be arranged laying over said bottom of said body, wherein a front wall of said body comprises an opening for externally exposing said outlet valve, wherein said sack support further comprises: a front sheet foldably connected to said base sheet, comprising anchoring means for said outlet valve and adapted to internally superimpose said front wall of said body; and a manipulation and fastening flap foldably connected to said front sheet to be accessible near or at the upper end of said body.

BRIEF DESCRIPTION OF THE DRAWINGS

Embodiments of the present disclosure will be given as examples and not for limiting purposes, with reference to the attached drawings, in which:

FIG. 1 schematically represents a perspective view of a cardboard packaging according to an embodiment of the disclosure;

FIG. 2 shows a side view of an inner sack and the relative cardboard support in the packaging of FIG. 1;

FIG. 3 is a front view of the assembly of FIG. 2;

FIG. 4 is an enlargement in the area of the outlet valve of the assembly of FIGS. 2 and 3;

FIGS. 5 and 6 show respective successive and final steps of the stabilisation procedure of the assembly of the previous figures to the rest of the pack, through perspective views of the upper area of the latter;

FIGS. 7 to 9 are respective cardboard flat blanks of different embodiments of the support of the sack according to the invention, cut edges being represented with a continuous line, while discontinuous lines represent folding lines, the blank of FIG. 7 substantially corresponding to the support in the embodiment according to the previous figures; and

FIG. 10 is a flat blank of a further, different embodiment of the support of the sack according to the invention, intended for a prism-shaped pack with an octagonal base.

DESCRIPTION OF EXAMPLE EMBODIMENTS

With reference to FIGS. 1 to 7, a packaging according to an embodiment of the disclosure comprises a box-shaped body 1 made from corrugated cardboard, in the illustrated embodiment having a parallelepiped shape, substantially cubic, formed according to the usual techniques of the field. On a front wall 1 a, near to the bottom 1 d, an opening 2 is formed for the insertion and exposure to the outside of an outlet valve Vu which shall be discussed in greater detail later on.
From the upper edges of the side walls of the body 1 respective upper flaps foldably extend, and more specifically: a front flap 3 a, at the front wall 1 a, two side flaps 3 b at respective side walls 1 b adjacent to the front wall 1 a, and a rear flap 3 c at a rear wall 1 c parallel and opposite to the front wall la. The upper flaps have key engagement means formed on them, suitable for ensuring that they are engaged with one another to obtain a partial top closure of the body 1. Such engagement means comprise, in particular, arrow-shaped tabs 4 on the free margins of the front and rear flaps 3 a, 3 c, suitable for being inserted in slits 5 that extend on the side flaps 3 b, according to a construction technique that is commonly used in the field.
In the housing 6 internally defined by the body 1, one or more (two in the illustrated example) tubular sleeve structures 7, 8 for stiffening and strengthening the side walls are preferably inserted. In practice, these are strips folded into a sleeve shape so as to define, in turn, side walls that internally line the walls 1 a-1 c of the body 1, thickening them. On the front walls 7 a, 8 a that lay on the front wall 1 a respective openings 7 b, 8 b are formed, corresponding to the opening 2 for the outlet valve Vu.
The body 1 also comprises a cover 9, formed according to conventional techniques, to shut the housing 6 on top. This housing 6 houses a sack S (FIG. 2), made from plastic such as a transparent food contact PE film of suitable strength, connected to a support made from corrugated cardboard 10.
The support 10 consists of a strip on which parallel and consecutive transverse folding lines 11 define (reference is made in particular to FIG. 7): a base sheet 12, suitable for internally superimposing the bottom of the body 1 and sized to this purpose; a front sheet 13 adapted to internally lay on the front wall 1 a (and relative stiffening walls 7 a, 8 a); and a fastening flap 14 adapted to be arranged substantially flush with the upper edge of the body 1.
In greater detail, the base shape 12 is the actual lower support of the sack 9, whereas the front sheet 13, in a suitable position near to the fold with the base sheet 12 (defined by two adjacent side-by-side lines), houses a fitting 15 for anchoring the valve Vu. The valve, with characteristics that can vary according to the prior art, is, in any case, represented by a rigid tubular element. In the depicted example the fitting (not represented in FIG. 1) is formed from a hole with a periphery having deformable radial tongues 15 a, which allow for the insertion of the valve and hold it exerting a certain elastic clamping. As described shortly hereafter, the fitting can take up different configurations, according to the type of valve and, however, in accordance with what is already known as such.
Also the fastening flap 14 has a pre-cut fitting 17, in this case intended to hold an inlet (filling) valve Vi of the sack 9, in turn consisting of a rigid tubular element. Also in this case the fitting can take up different shapes, for example that of a seating shut by a foldable tongue that, by lifting, opens the seat itself to a lesser or greater extent, also acting as a holding element. The fitting 17 can also, like in the example here considered, be housed by an inner portion 14 a of the flap 14, adapted to be articulated along one of the folding lines 11 with respect to an end portion 14 b, all of this also in view of the positioning of the inlet valve in a stocking configuration that will be discussed shortly hereafter.
The fastening flap, in addition to grip windows 16, comprises a foldable tongue 18, with contoured ends, projecting from the free edge of the flap, free edge which corresponds to one of the transversal sides of the strip that realizes the support 10. The tongue 18 is suitable for laying over the front top flap 3 a of the body 1, to engage with a slot 21 formed therein, and finally with a further, corresponding slot 19 in the same fastening flap 14. The front top flap 3 a of the body 1 is also equipped with a passage 20 to give access to the inlet valve 18.
In use, the arrangement of the sack S in the housing 6 of the body 1 can be controlled by a worker precisely by operating from the outside on the fastening flap 14 through the grip windows 16, which act as handles, whereas the front sheet 13 constitutes an element for transmitting the displacement to the base sheet 12. Therefore, there is a real manoeuvrability of the support, which can be arranged with precision, effortlessly and above all without needing to insert the arms in the housing 6. The same capabilities also make it easy to extract the sack/support assembly, when required.
A further characteristic deriving from the special structure of the support 10 consists in the possibility of anchoring the inlet valve Vi at the top, which, besides making the filling operations of the sack S easier, has the effect of supporting the latter as is emptied, preventing it from completely collapsing, counteracting the formation of folds and pockets that trap the liquid contained, and therefore promoting regular flow up to the end. If necessary, such a flow can also be further assisted by lifting the side of the base sheet 12 opposite the front sheet 13, so as to make the former close in rotation towards the latter and thus obtain a sort of squeezing of the sack. To this purpose, as represented in FIG. 2, a string F, to be gripped from the outside of the packaging, can be linked to a slot 25 formed in a suitable position in the base sheet 12.
It should also be noted that the assembly of the support 10 and the sack S, once extracted and separated from the body 1, can be folded neatly so as to occupy a very small space in a stocking arrangement. Indeed, thanks to folding lines (or creases) arranged in pairs, like in the example, it is possible to fold the two base and front sheets 12, 13 like a book, leaving in between the volume necessary to contain and clamp the encumber of the empty sack S and the valve Vi. The closure of the assembly can be ensured by the same tongue 18 that will engage with the aforementioned slot 25.
With reference now also to FIGS. 8 and 9, numerous variants can be proposed in the configuration of the strip-like sheet that constitutes the cardboard support of the sack S. Firstly, in the embodiment of FIG. 8 it can be seen that the fastening flap can be more elongated, until it degenerates into an actual covering sheet 114 that shuts the entire opening gap, or open top, of the housing 6 of the body 1 and protects the sack S on top. The manipulation and fastening sheet 114 has two pairs of gripping windows 116, and at the end of the strip a foldable edge 123 to stabilize the sheet itself, being tucked in between the reinforcement sleeves 7, 8 and the rear wall 1 c of the body 1.
Moreover, an inspection door 124 is foldably articulated at the center of the manipulation and fastening sheet 114. The foldable fastening tongue 118 in this case is actually formed by subtracting material from the door, at the opposite side to that of articulation. Furthermore, a locking tang 122 is arranged at the end of the base sheet 112, to act as a locking element of the assembly in the aforementioned stocking configuration folded like a book, engaging with the slot 119 that, when the support is assembled with the body 1, receives the tongue 118. Finally, it should be noted that an engagement fitting 115 of the outlet valve is shaped in this case more simply according to a polygonal outline, as in a different known standard.
In the embodiment of FIG. 9, the fastening, manipulation and shutting sheet 214 has in turn an inspection door 224, of a smaller size than in the previous case, and there can be noticed engagement fittings 215, 217 for the discharge and inlet (filling) valves, respectively, shaped again differently with respect to the previous examples, for both of the valves. In particular, in this case, and according to a further standard, known as such, there will be tongues 215 a, 217 a with an isosceles trapezoidal profile, incident to the periphery of a circular hole 215 b, 217 b and adapted to be lifted to make such a perimeter breakable upon the act of insertion of the relative valve. The stabilization of the sheet via the edge 223 on the rear side can make the presence of an engagement tongue superfluous; in fact, the tongue is indeed absent in this embodiment. Nevertheless, it is possible to see the slot 219 that in this case will only be used to engage with the locking tang 222 in the stocking arrangement.
Between the two solutions indicated above (covering sheet limited to a flap, or else a complete one shutting the entire open top of the housing 6), there can also be intermediate solutions, i.e. with a fastening, manipulation and covering sheet that partially shuts the open top of the housing, and carrying the engagement fitting of the upper valve cut on the relative free edge or transversal side. The latter edge can also provide for foldable keys that engage with slots of the bottom sheet, also in this case to the purpose of keeping the sheets clamped together in the stocking arrangement, again made possible by the folds/creases in adjacent pairs that, suitably spaced, ensure that there can be a properly compact boxing of the sack.
In all cases, the strip that makes the support 10 can also comprise, along the longitudinal sides, i.e. those that extend along the direction of development of the strip, but also along the transversal side opposite the fastening one, some tabs that can be folded towards the inside of the housing to consolidate the pack at the corners and increase the stability of the assembly, at the same time realizing side supports that make the inside of the corners more regular, avoiding the formation of gaps that could even cut the sack. An example of this is provided by the same FIG. 8, in which it is possible to see tabs 126 along the longitudinal sides of all three sheets. Furthermore, it is clear that the handles 16, 116, 216 can be positioned and configured differently, and that both the base sheet and the front sheet can have low surface extension in width through shaping or profiling of various kinds.
Furthermore, FIG. 10 highlights the possibility of using embodiments of the present disclosure also with packagings of a different shape than a parallelepiped, for example prisms with a hexagonal, octagonal or polygonal base and in general of any other profile. The flat blank represented in such a figure is entirely comparable to the example described earlier, with obvious adaptations to the profile of the base sheet 312 and fastening and manipulation sheet 314 (octagonal in this case). Otherwise, the components correspond to those of the previous examples, as made clear by the congruence between the various reference numerals.
The body 1, and consequently the support structure 10 with the sack S, can of course be made according to various sizes, again resulting in an ecological but very strong pack. The assembly as described is made up of modules that are fitted together extremely easily. The support 10 is introduced from the outside without the need to manoeuvre the other components and acts also as a container of the sack. Along with the possibility of locking also the filling valve, it is even possible, contrary to known packagings, to use standard filling units that can work on the valve exposed and stabilized at the top. Thanks to the locking system of the upper flaps of the body 1, the side walls stay firmly and precisely upright, even after the sack has been filled.
The possibility of folding every component (even the body 1 that will, as mentioned, be made from a flat blank according to conventional methods), ensures that the packaging, in unassembled condition, occupies small spaces, with enormous advantages compared to conventional tanks. All of the components can be recovered and/or replaced when they have deteriorated. The use of cardboard, in addition to the obvious advantages over materials like plastic, iron and wood, also allows personalised prints to be applied, making a great advertising power available. Finally, the high thickness of the side walls constitute an effective insulating barrier that protects the product contained from thermal excursions, both during the summer and in extreme cold conditions.
All of the engagement systems with arrow-like keys can be replaced by analogous solutions appearing equivalent to a man skilled in the art. At least some of the cutting lines of the flat blank to which reference was made in the description can initially be formed as pre-cut lines, to be torn at the time of forming the packaging.
The assembly of support 10 and sack S with the special features here described and claimed is obviously to be considered within the scope of the present invention also when considered alone, that is apart and isolated from the body 1.
The present invention has been here described with reference to preferred embodiments. It should be understood that there may be other embodiments within the same inventive concept, as defined by the scope of protection of the following claims.

Claims

1. A tank-like packaging comprising

a box-shaped body made of cardboard with a bottom and defining a housing, and

a sack made of plastic material, the sack being adapted to be housed in said housing and comprising at least one outlet valve and at least one inlet valve, said outlet valve being connected to a sack support, made of cardboard and comprising a base sheet adapted to be arranged laying over said bottom of said body, wherein a front wall of said body comprises an opening for externally exposing said outlet valve,

wherein said sack support further comprises:

a front sheet foldably connected to said base sheet, comprising anchoring means for said outlet valve and adapted to internally superimpose said front wall of said body; and

a manipulation and fastening flap foldably connected to said front sheet to be accessible near or at the upper end of said body.

2. The packaging according to claim 1, wherein said manipulation and fastening flap comprises fastening means for fastening the support to the body and grip means adapted to allow the grip by the hands of a worker.

3. The packaging according to claim 1, wherein said manipulation and fastening flap comprises anchoring means for said inlet valve.

4. The packaging according to claim 1, wherein said manipulation and fastening flap acts as a covering sheet adapted to shut substantially entirely the top of said housing, said covering sheet being arranged substantially parallel to said bottom above said sack.

5. The packaging according to claim 4, wherein at least one inspection door is formed in said covering sheet.

6. The packaging according to claim 1, wherein said grip means comprise one or more windows for insertion of hands of a worker.

7. The packaging according to claim 1, wherein said anchoring means for said outlet valve and/or said inlet valve comprise shaped patterns including holes, cut or pre-cut lines on respective sheets or flaps.

8. The packaging according to claim 1, wherein said fastening means comprise a tongue foldably projecting from said manipulation and fastening sheet or flap and adapted to engage with engagement means formed in a top front flap foldably extending from said front wall of said body and with engagement means formed in said manipulation and fastening sheet or flap.

9. The packaging according to claim 1, wherein said fastening means comprise a foldable edge adapted to be engaged with a rear wall opposite said front wall of said body.

10. The packaging according to claim 1, further comprising at least one stiffening sleeve, made of cardboard, adapted to be inserted within said housing for increasing stiffness of the side walls.

11. The packaging according to claim 10, wherein said foldable edge is tucked between said rear wall and said at least one stiffening sleeve.

12. The packaging according to claim 1, wherein from at least one among said base sheet, said front sheet and said manipulation and fastening sheet or flap, foldable flaps extend towards the inside of said housing, for strengthening the packaging at the corners and increasing stability.

13. The packaging according to claim 8, wherein said body comprises, in addition to said top front flap, other top flaps foldably extending from respective other side walls of the body, wherein key engagement means are provided for carrying out a mutual engagement between said top flaps to form a partial covering of the top of said housing.

14. The packaging according to claim 1, wherein said base sheet, said front sheet and said manipulation and fastening sheet or flap are mutually separated by twin folding or creasing lines, adapted to permit a book-like folding of the sheets, in a stocking arrangement when the sack is empty, defining a volume suitable to contain the same sack and the relative outlet valve, the packaging further comprising locking means for stabilizing said stocking arrangement, said locking means being arranged between said manipulation and fastening sheet or flap and said base sheet.

15. The packaging according to claim 14, wherein said locking means comprise said fastening tongue cooperating with a slot formed in said base sheet.

16. The packaging according to claim 14, wherein said locking means comprise at least one tang formed in said base sheet cooperating with a slot of said manipulation and fastening flap.

17. The packaging according to claim 1, wherein tying means formed on said base sheet further comprising for allowing string-like means to be connected, said string-like means being adapted to be gripped from outside the packaging for assisting rotation of the same base sheet towards said front sheet, to squeeze said sack.

18. An assembly comprising

a sack made of plastic materials for containing liquids or the like and

a cardboard support realized and adapted be used in the packaging according to claim 1.