ITUB20154193A1 - Rough for the production of a tray and tray. - Google Patents

Description

DESCRIPTION

"Blank for the realization of a tub and tub"

The present invention relates to a blank for making a tray.

Trays obtained starting from a blank, typically made of laminated material comprising paper and / or plastic materials such as polyester and polyethylene and others, are currently available on the market.

The trays comprise a bottom wall and a raised side edge that surrounds the bottom wall. Overall, the back wall and the lateral edge define a compartment open upwards.

The trays currently available are obtained starting from a blank comprising a central flap, intended to form the bottom wall of the tray, which typically has a quadrangular shape. Four lateral flaps are joined to the sides of the central flap in correspondence with respective fold lines. By folding the side flaps upwards around the relative fold lines, the lateral edge of the tray is defined. The side flaps are provided with flaps intended to overlap each other, or to overlap an adjacent flap, so as to form junction areas in which it is possible to tie the side flaps together. In particular, the flaps are fixed by gluing to an adjacent flap or to an adjacent lateral flap.

In the blanks currently available, the side flaps and any joining edges are not connected to each other, but are separated by cuts or notches which interrupt their continuity. This means that, once the tray is formed, the side flaps are not joined together in a sealed manner, but are separated by such cuts or notches. It is obviously possible to seal the areas of discontinuity between the flaps, but this involves the execution of laborious gluing or thermoforming steps. Furthermore, if the sealing is not perfect, the contents of the tray could seep through the unsealed areas or come into contact with the adhesive material.

The object of the present invention is to offer a blank for making a tray which allows the drawbacks of currently available blanks and trays to be overcome.

An advantage of the blank according to the present invention is that it allows the formation of a tray whose lateral edge is perfectly sealed.

Another advantage of the blank according to the present invention is that it can be easily obtained by means of a common roughing process.

Further features and advantages of the present invention will better appear from the detailed description that follows of an embodiment of the invention in question, illustrated by way of example but not of limitation in the attached figures in which:

Figure 1 shows a plan view of a first embodiment of the blank;

figure 2 shows a detail of the folding of the blank of figure 1;

figure 3 shows a schematic view in axonometry of the blank of figure 1;

- figure 4 shows a schematic view of the tray obtainable starting from the blank of figure 3;

figure 5 shows a schematic view of a second embodiment of the blank;

Figure 6 shows a detail of a region of the blank in an intermediate folding configuration to obtain the tray;

figure 7 shows a further embodiment of the blank; figure 8 shows the tray obtainable from the blank of figure 7;

- figure 9 shows a detail of the tray of figure 8.

The blank according to the present invention comprises a central flap (2), intended to form the bottom wall of the tray. Four side flaps (3) are joined to the sides of the central flap (2) in correspondence with respective bottom fold lines (23). The bottom fold lines (23) surround the central flap (2) substantially defining a straight quadrilateral. Preferably the bottom fold lines (23) adjacent to each other are in contact with each other at their ends. The side flaps (3) can assume a folded configuration, each around its own folding line (23), in which they are inclined with respect to the central flap (2) and define the side wall of the tray.

The blank also comprises four angular flaps (4), each of which is connected to the central flap and joins two adjacent lateral flaps (3) in correspondence with angular fold lines (34). Basically, the blank therefore comprises a single continuous sheet, i.e. without openings, in which the side flaps, in addition to being joined to the bottom flap (2), are also joined together by means of the angular flaps (4). The angular (34) and bottom (23) fold lines are continuous lines, without gaps or openings. In this way the tray that can be obtained starting from the blank is perfectly sealed, since neither the various flaps, nor the folding lines and the junction areas between the various flaps have any opening.

Each of the angular flaps (4) is provided with a median folding line (40) in correspondence with which the angular flap (4) can fold back on itself. In particular, each median folding line (40) divides its angular flap (4) into two portions which can be superimposed on each other.

Preferably, the angular fold lines (34) are arranged so that, in the folded configuration of the side flaps (3), they can substantially approach one another. In other words, by folding each angular flap (4) on itself around the median folding line (40) the angular folding lines (34) are brought into contact and the adjacent lateral flaps (3) are arranged in the folded configuration.

In this configuration, the side flaps (3) are therefore in contact with each other at the different angular fold lines (34), defining the side wall of the tray. Any crack that should form between two adjacent angular fold lines (34) would not lead in any case to the outside of the tray, but to the space between the two adjacent portions of the relative angular flap (4), as shown in figure 2.

The angular fold lines (34) of each corner flap (4) are arranged symmetrically with respect to the median fold line (40). In this way, each angular flap (4) is divided into two portions which are mutually symmetrical with respect to the median folding line. These symmetrical portions overlap each other in the folded configuration of the side flaps (3) in which the angular fold lines (34) are adjacent to each other.

To make the tray each side flap (3) is folded around its own bottom fold line (23) and each corner flap (4) is folded on itself around the median line (40), so as to bring the lines together corner bends (34).

In the preferred embodiment of the tray, the angular flaps (4) are folded on themselves towards the outside of the tray, so as to arrange themselves outside the side wall of the tray. Each corner flap (4) is fixed on the outer side of an adjacent side flap (3) as shown in Figure 2, for example by glue. In this way, the angular flaps help to stiffen the structure of the tray. Furthermore, the continuous structure of the corner flaps (4), i.e. without openings, prevents the contents of the tray from coming into contact with the glue used to fix the corner flaps (4) themselves.

Alternatively, the corner flaps (4) could be folded towards the inside of the tray and be fixed on an inner side of the side flaps (3). In this case it is not possible to exclude an accidental contact between the contents of the tray and the means used for fixing the corner flaps (4).

Preferably, the angular flaps (4) and the related folding lines (34,40) are shaped so that the lateral flaps (3) are not perpendicularly inclined with respect to the bottom flap (2) in the folded configuration of the blank to form the tray. In an embodiment not shown, angular flaps (4) and fold lines (34,40) could instead be shaped so that the side flaps (3) are arranged perpendicular to the bottom flap (2) in the folded configuration of the blank to form the tray.

As can be seen in Figure 3, the blank according to the present invention can also be provided with one or more reinforcement flaps (5), each of which is connected to a respective side flap (3) in correspondence with a folding line (35) around which the reinforcement flap (5) can fold and approach its side flap (3). In other words, the reinforcement flap (5) can overlap its side flap, so as to double its thickness at least for a portion. The reinforcement flap (5) can have the same width as its side flap (3), measured perpendicular to the fold line (35), or have a smaller width. In both cases the reinforcement flap (5), superimposed and coupled to its side flap (3) for example by gluing, allows the lateral wall of the tray to be stiffened.

The reinforcement flap (5) shown in Figure 3 preferably extends between two angular fold lines (34) arranged at the ends of the relative side flap (3). In this way, once folded around the fold line (35) the side flap (5) overlaps its side flap (3) substantially for the entire length measured parallel to the fold line (35).

In an alternative embodiment shown in Figure 5, each reinforcing flap (5) can be flanked at its ends by two triangular flaps (6), foldable around the same folding line (35) of the flap (5). In the folded configuration of the blank, each triangular flap (6) can be superimposed on an angular flap (4) which is in turn folded as described above, according to figure 6. The triangular flaps (6) therefore allow to further stiffen and strengthen the areas corners of the tray.

In a further embodiment, shown in Figure 7, each reinforcement flap (5) comprises two intermediate fold lines (51,52), parallel to the fold line (35) of its side flap (3), with respect to which the reinforcement flap (5) can be folded back on itself.

As shown in Figure 8, a first intermediate fold line (51) allows the reinforcement flap (5) to be folded back on itself, so that at least an upper portion (53) is superimposed in two layers. A second intermediate folding line (52) makes it possible to arrange the remaining portion (54) of the reinforcement flap (5) close to its side flap (3), so that it can be fixed to it. This remaining portion (54) can have the same extension or a smaller extension than the side flap (3) measured perpendicular to the fold lines (35,51,52). In the folded configuration of the reinforcement flap, the second intermediate fold line (52) substantially overlaps the fold line (35) of the reinforcement flap (5). The upper portion (53) of the reinforcement flap remains laterally protruding with respect to the lateral wall of the tray, so that it can be used for example to facilitate the attachment of a lid or to facilitate the handling of the tray.

In all the solutions described, the reinforcement flap (5) is fixed to its side flap (3) preferably by gluing.

Claims (10)

CLAIMS 1) Blank for making a tray, comprising: a central flap (2), intended to form the bottom wall of the tray; four lateral flaps (3), joined to the sides of the central flap (2) in correspondence with respective bottom fold lines (23); characterized by the fact that: it comprises four angular flaps (4), each of which is connected to the central flap and joins two adjacent lateral flaps (3) in correspondence with angular fold lines (34); each of the angular flaps (4) is provided with a median folding line (40) in correspondence with which the angular flap (4) can fold back on itself; the angular fold lines (34) are arranged so that, in a folded configuration of the side flaps (3), the angular fold lines (34) of the same corner flap (4) are substantially next to each other . 2) Blank according to claim 1, wherein the angular fold lines (34) of each angular flap (4) are arranged symmetrically with respect to the median fold line (40) of the same angular flap (4). 3) Blank according to claim 1, comprising one or more reinforcement flaps (5), each of which is connected to a respective side flap (3) in correspondence with a folding line (35) around which the reinforcement flap ( 5) can fold up and approach its side flap (3). 4) Blank according to claim 3, wherein each reinforcement flap (5) comprises two intermediate folding lines (51,52), parallel to the folding line (35) of its side flap (3), with respect to which the flap reinforcement (5) can be folded back on itself. 5) Tray for containing objects, comprising a bottom wall (2) and a raised side edge (3), in which the bottom wall (2) and the side edge (3) are respectively defined by the central flap (2 ) and from the side flaps (3) of a blank (1) according to one of claims 1 to 4, characterized in that each angular flap (4), folded on itself around its own median folding line (40), is arranged outside the side flaps (3) and is fixed to a side flap (3). 6) Tray for containing objects, comprising a bottom wall (2) and a raised side edge (3), in which the bottom wall (2) and the side edge (3) are respectively defined by the central flap (2 ) and from the side flaps (3) of a blank (1) according to one of claims 1 to 4, characterized in that each angular flap (4), folded on itself around its own median folding line (40), is arranged inside the side flaps (3) and is fixed to a side flap (3). 7) Tray according to claims 5 or 6, in which the corner flap (4) folded on itself is fixed to an adjacent side flap (3) by means of glue. 8) Tray for containing objects, comprising a bottom wall (2) and a raised side edge (3), in which the bottom wall (2) and the side edge (3) are respectively defined by the central flap (2 ) and from the side flaps (3) of a blank (1) according to claim 3, characterized in that each reinforcing flap (5) is folded around its own folding line (35) and is coupled and fixed to its side flap (3). 9) Tray for containing objects, comprising a bottom wall (2) and a raised side edge (3), in which the bottom wall (2) and the side edge (3) are respectively defined by the central flap (2 ) and from the side flaps (3) of a blank (1) according to claim 4, characterized in that each reinforcing flap (5) is folded on itself around a first median fold line (51) and is folded around to a second folding line (52) so as to superimpose its own remaining portion (54) on its side flap (3). 10) Tray according to claims 8 or 9, in which each reinforcing flap (5) is fixed to its side flap by glue.