EP1475309A1 - Blank of semi-rigid material for assembling of traylike package and corresponding package - Google Patents

Abstract

The paper has a transversal wall articulated on two horizontal walls by two parallel folding lines. Another transversal wall has two parts articulated on longitudinal walls (2) by perpendicular folding lines that join two flaps on a base of the walls. The walls have respective parts protruding towards the top. Openings (9) are cut in corresponding position at the bases and in the flap to receive blocking and stacking units. Independent claims are also included for the following: (a) a process of fabrication of the flong paper (b) a package of type tray or sleeve pack.

Description

The present invention relates to pre-cut and repressed blanks semi-rigid material, such as cardboard or corrugated board, for the realization of a packaging type tray or tray, and a manufacturing method of these blanks.

The invention also relates to packaging made from such blanks and usable for the packaging of products and various articles, in particular foodstuffs, for which excellent ventilation of the packaged products is necessary.

Tray or tray-type packaging is used to the packaging of countless items, from fruits and vegetables up to fresh foods, such as yogurts or dairy products.

These packages generally include a bottom consisting of a single rectangular panel, following the edges of which are hinged by folding lines of the walls straightened perpendicularly to this bottom and locked in this position by means known in the technical, for example by flaps articulated by fold lines perpendicular to the bottom at the ends of two parallel walls and applied and glued against the inner side of the contiguous walls.

American and American half-boxes are also used for this purpose. packaging derived therefrom, in which the bottom part is constituted by the two large flaps of the half-body, articulated by fold lines on two parallel and folded walls perpendicular to these, the sides of the flaps parallel to these walls being disposed edge to edge, so as to completely close the part of the bottom thus produced, the flaps being able to be locked in this position by any means known in the art.

Stacking lugs generally protrude into the part top of two parallel walls of these packages, and cuts are then provided in corresponding position in the bottom part and at the base of these walls, to receive the tenons of a package identical immediately below, in a pile of such packaging.

Packaging of this type has many applications and they generally give users complete satisfaction, but they have the disadvantage, in the case where the packaged products require excellent ventilation, allow only one limited air circulation, especially in the stacking position, due to that the bottom part has no air passage and that the walls sideways have the same height most of the time.

It is possible, of course, to leave indentations at the upper part of these walls, but this translates into falls from material used, eg corrugated cardboard, to the detriment of the cost manufacturing of these packages.

The invention aims to remedy these drawbacks by proposing a stackable packaging of tray or tray type, from a single flan precut and reprocessed of a semi-rigid material or two blanks assembled by gluing or the like, wherein, of manufacture, the part background may be important for ambient air, while that the side walls have at their upper part a notch allowing excellent product ventilation packaged, even in the stacking position of the packages.

• les parties desdits panneaux et volets contiguës aux lignes de pliage parallèles entre elles comportent de part et d'autre de la ligne de pliage associée une partie en saillie par rapport au bord libre correspondant de ce panneau ou de ce volet, ces parties en saillie étant divisées en deux par la ligne de pliage correspondante et destinées à former, après mise en forme de l'emballage, des dièdres de gerbage et de calage en position gerbée des emballages, tandis qu'une découpe destinée à recevoir un tel dièdre est ménagée en position correspondante dans lesdits panneaux ou volets contigus et les parties associées formant rabats ou parties de rabat suivant les lignes de pliage alignées associées ;
• et chaque panneau ou volet et la partie associée formant rabat ou partie de rabat ont une forme complémentaire.

For this purpose, the first object of the invention is a pre-cut and repressed blank made of a semi-rigid material such as cardboard or corrugated cardboard for the production of a tray or tray type packaging, this blank comprising a first panel intended to form a first wall of the package, which are side by side parallel fold lines two second panels intended to form two second walls parallel to each other and perpendicular to the first wall, each of these second panels being adjoined laterally by a line bending parallel to the previous one shutter, said flaps being intended to overlap and be assembled together, after shaping the packaging, to form a second first wall similar to the first wall and perpendicular to the second contiguous walls, while that on each of said first and second panels and on each of said flaps are hinged s by fold lines perpendicular to the preceding and arranged in the extension of each other flap portions not adjacent to adjacent portions forming flaps and intended to be folded perpendicularly to the panels or associated flaps and to be assembled in this position to form the bottom of the package,
this package being characterized in that:

• the parts of said panels and shutters contiguous to the fold lines parallel to each other comprise, on either side of the associated fold line, a portion projecting from the corresponding free edge of this panel or shutter, these protruding parts being divided in two by the corresponding folding line and intended to form, after shaping the package, dihedrons stacking and shimming in the stacked position of the packages, while a cutout for receiving such a dihedron is formed in corresponding position in said adjacent panels or flaps and associated flap portions or flap portions along the associated aligned fold lines;
• and each panel or shutter and the associated flap portion or flap portion have a complementary shape.

In a variant, the subject of the invention is a second blank derived from previous, from which it can be considered as derived from first panel corresponding to the first wall and the part forming flap associated with this panel along a parallel cutting line to folding lines through which the panels and half-panels are articulated together, two blanks of this type that can be shaped and assembled to form a tray or tray type packaging.

This second blank therefore comprises a single panel intended for form a wall of the package, on which are laterally articulated by folding lines parallel to each other two flaps intended for each forming part of a contiguous wall, a flap being hinged on the panel by a fold line perpendicular to the previous ones while a flap portion is hinged to the adjoining flaps by a fold line located in the extension of that by which the panel and flap are hinged together, with of course the same parts protruding as before, on both sides of parallel folding lines, to form stacking dihedrons and same cuts intended to receive these dihedrons in position respectively on the panel and associated shutters, and on the flap and flap parts, and also with the same profiles complementary of the panel, the flap and the parts arranged on the and other parallel fold lines.

Due to the complementarity of the shapes of the panels or flaps and flaps or flap portions attached thereto in blanks of both types described above, it is possible to manufacture such blanks in a nested position in one another by a single cutting and pressing operation of a plate of the semi-rigid material of which they are constituted. Such a manufacturing process, simple and easy to implement for a reduced cost, because no training virtually no falls of the semi-rigid material, constitutes a another object of the invention.

To make a package from the first blank defined above, panels and shutters for forming the walls are folded perpendicular to each other and the flaps and flap portions are also folded perpendicular to the panels or shutters the flaps that overlap, as well as the parts of flap, and being assembled together by known means in the technique, for example by gluing.

Similarly, to make a package from two second blanks defined above, in each blank the shutters adjacent to the panel intended to form a wall are folded perpendicularly to it and the flap adjoining this panel as well that the flap portions adjoining the flaps are folded perpendicular to the adjoining parts, two blanks thus placed form being then brought into a position such that the flaps, the flaps and flap portions come to overlap and can be assembled in this position, for example by gluing.

The packaging thus produced constitutes another object of the invention.

For the reasons set out above, in a form of highly preferred embodiment, the flaps of these packages are not not contiguous but on the contrary, preferably leave between them a wide opening, allowing excellent air circulation to through articles packaged from this opening up to recesses of complementary shape of the flaps located in the part upper walls.

Of course, if, for some applications of the packaging, the opening of the bottom is troublesome, we can fill the bottom of the wrapping of a sheet or panel of any material able to close this opening.

Various embodiments of the packaging according to the invention will be described below, with reference to the drawings schematic annexed.

La figure 1 est une vue en perspective d'une première forme de réalisation de l'emballage ;

La figure 2 est une vue en plan du flan de carton ondulé, précécoupé et refoulé, dont est issu l'emballage de la figure 1 ;

La figure 3 est une vue en plan illustrant la réalisation simultanée de flans du type de la figure 2 imbriqués les uns dans les autres, par découpe et refoulage d'une plaque de carton ondulé ;

La figure 4 est une vue en perspective d'un second emballage conforme à l'invention ;

La figure 5 est une vue en plan d'un flan de carton ondulé prédécoupé et refoulé, destiné à la réalisation de l'emballage de la figure 4, par mise en forme et assemblage de deux flans de ce type.

On these drawings:

Figure 1 is a perspective view of a first embodiment of the package;

Figure 2 is a plan view of the corrugated cardboard blank, pre-cut and reprocessed, from which the package of Figure 1;

FIG. 3 is a plan view illustrating the simultaneous production of blanks of the type of FIG. 2 which are nested one inside the other, by cutting and extruding a corrugated cardboard plate;

Figure 4 is a perspective view of a second package according to the invention;

Figure 5 is a plan view of a corrugated cardboard blank pre-cut and repressed, for the embodiment of the package of Figure 4, by shaping and assembly of two blanks of this type.

Reference is made first to FIGS. 1 to 3.

The packaging 1 of the tray type shown in Figure 1 comprises two longitudinal walls 2 parallel to each other and a transverse wall 3 perpendicular to the walls 2 and articulated thereon by two parallel fold lines. A second transverse wall parallel to the wall 3 consists of two parts 3a, 3b walls perpendicular to walls 2, on which they are articulated by folding lines perpendicular to the preceding. Part 3 b covers the part 3a and is bonded to the latter.

At the base of the walls 2 and 3 are articulated by folding lines perpendicular to the preceding, flap portions, respectively 4 and 5, straightened perpendicularly to these walls and assembled by gluing the flap 5 on the flaps 4. Similarly, at the base of the wall portions 3 a , 3 b are articulated by fold lines of the flap portions 5 a , 5 b which are overlapped and are bonded together and which are also glued against the flaps 4, all the flaps 4, 5, 5 a -5 b , thus forming the bottom of the plate 1.

It will be noted that neither the flaps 4, or the flaps 5 and 5 a -5 b not have contiguous edges and they leave and substitute them a large rectangular opening 6, allowing easy passage of air through this opening.

In each of the corners of the package 1, the longitudinal walls 2 and transverse portions 3 and 3 a -3 b comprise a stepped profile portion, which protrudes upwardly, these portions being referenced 7, in the drawings, for walls 2, 8 to the walls 3 and 8 a, 8 b, to the wall portions 3a, 3b.

The contiguous projecting parts of two articulated walls between they by a fold line are also articulated by this line of folding and they thus form, protruding in each of the angles of the packaging, a dihedral shaped part, which serves as wedging element and stacking such trays stacked on top of one another. of the openings 9, cut in the corresponding position at the base of the sides of the tray and in the adjoining flaps receive the elements of wedging and stacking and thus ensure excellent holding in position bunk trays.

This tray is made by shaping and assembly of the single blank 10 shown in Figure 1. It is seen from this figure that the portions corresponding to walls or parts of walls 2, 3, 3a and 3b are hinged together by parallel fold lines, while the portions forming the flaps or flap portions 4, 5, 5 a , 5 b are hinged to the associated wall portions by fold lines aligned with each other and perpendicular to the previous ones.

According to an important characteristic of the invention, each part forming wall or part of wall and the associated part forming flap or flap portion have a complementary profile, each wall 2, 3, 3 a -3 b , thus having, at its part upper, a large indentation complementary shape of the associated flap, which thus allows, in association with the opening 7 of the packaging, an excellent flow of air through the packaged articles.

This breakdown is essential when the packaged products are perishable foods, such as yogurts or other dairy products, pastries, fruits etc ...

The particular shape of the blanks 10 has the further advantage to be able to manufacture them simultaneously in nested position in the others, limiting to the maximum the corrugated cardboard falls, by a single operation of cutting and pressing a plate of corrugated cardboard, as seen in Figure 3.

In order to further increase the ventilation of the packaged articles, openings 11 are formed in the side walls, while grip cutouts 12 are provided at the base of the walls 3 and 3 a -3 b .

Of course, instead of half-transverse walls covering and being assembled by gluing, the plate can comprise half-longitudinal walls assembled in the same way and on each of which is articulated half a flap.

Figures 4 and 5 illustrate another form of implementation of the invention, in which the plate 21 consists of two parts from similar blanks.

Each of these blanks 20 can be considered as half of the blank 10 of Figure 2, obtained by cutting the panel 3 and the part forming flap 5 of this blank 10 by a cutting line parallel to fold lines by which the panel 3 is articulated on the 2 adjoining panels.

The blank 20 therefore comprises a panel 22, intended to form a longitudinal wall, hinged to each of its lateral ends by parallel fold lines of the flaps 23 a and 23 b, each intended to constitute a portion of a transverse wall .

On the panel 22 is hinged by a bonding line perpendicular to the preceding part 24, intended to be folded perpendicular to the panel 22 to form a flap, while the shutters 23 a, 23 b, are articulated analogously, by fold lines aligned with that by which the flap 24 is hinged to the panel 22, portions 25 a and 25 b, to be adjusted perpendicularly to the shutters 23 a and 23 b to form flap portions.

As in the blank 10, parts 27, 28 a and 28 b respectively project to the adjacent ends of the panel 22 and the flaps 23 a and 23 b, the side opposite the parts 24, 25 a and 25 b, and the line folding by which the parts 23 a and 23 b are hinged to the panel 22 extending between the adjacent portions 27, 28 a and 27, 28 b, so that after shaping of the blank, these parts may form a dihedral stacking and stalling. At the corresponding position, the ends of the panel 22 and flaps 25 and 25 has, on the side portions 24, 25 a and 25 b, as well as these parts are provided cut-outs 29.

As before the panel 22 and the portion 24 forming a flap on the one hand, and the flaps 23 a, 23 b, and the portions 25 a, 25 b, on the other hand, have complementary profiles for cutting blanks Identical in nested position in the same corrugated board.

After shaping two sheets 20 like, it is sufficient to bring the parts 23 b and 25 b of a cover portions 23a and 25a from each other and assemble them in this position, for example by gluing, to obtain the plate 21 of FIG.

This tray 21 has, as the plate 1, a bottom consisting of flaps 24 and the flap parts 25 a, 25 b, between which remains a large opening 26 which, in cooperation with the notches formed at the upper part of the walls 22 and 23 a , 23 b , allows excellent ventilation of the packaged articles in the tray, even in the stacked position thereof.

The invention therefore provides a tray-type stackable package or container, in which the bottom and the side walls have openings allowing a good circulation of ambient air and can nevertheless be manufactured at a modest cost, due to the lack of of cardboard or corrugated cardboard of which it is made and of the simplicity of the cutting and crushing mode of the starting blanks.

Claims (7)

Blank precut and repressed in a semi-rigid material such as cardboard or corrugated cardboard for the realization of a tray-type packaging or tray, this blank comprising a first panel (3) intended to form a first wall of the package , to which two second panels (2) are joined laterally by parallel fold lines to constitute two second walls parallel to each other and perpendicular to the first wall, each of these second panels (2) being laterally adjoined by a parallel fold line to the previous one shutter (3 a , 3 b ) said flaps being intended to overlap and to be assembled together, after conditioning of the packaging, to form a second first wall (3 a- 3 b ) similar to the first wall (3) and perpendicular to the second contiguous walls (2), while on each of said first and second panels and on each of said flaps are articulated by fold lines perpendicular to the preceding and disposed in the extension of one another portions flaps (4, 5, 5 a, 5 b) not adjoining the parts contiguous flap and intended to be folded perpendicularly to the panels or flaps associated and to be assembled in this position to form the bottom of the package,
this package being characterized in that : the parts of said panels (2, 3) and flaps (3 a , 3 b ) contiguous to the fold lines parallel to each other comprise on either side of the fold line associated with a portion (7, 8, 8 a , 8 b ) projecting relative to the corresponding free edge of this panel or shutter, these projecting parts being divided in two by the corresponding folding line and intended to form, after shaping the package, stacking dihedrons and wedging in the stacked position of the packages, while a cutout (9) for receiving such a dihedron is formed in corresponding position in said adjacent panels or flaps and the associated parts forming flaps or flap portions following the aligned fold lines associated; and each panel (2, 3) or flap (3, 3b) and the associated portion (4, 5, 5a, 5b) flap or flap portion have a complementary shape. Blank precut and repressed in a semi-rigid material, corresponding to one half of the blank of claim 1, this blank comprising a single panel (22) intended to form a wall of the package and on which are articulated laterally by lines of folding parallel to each other two flaps (23 a , 23 b ) intended to form each a part of a contiguous wall, a flap (24) being articulated on the panel (22) by a fold line perpendicular to the preceding ones whereas a flap portion (25 a , 25 b ) is articulated on the adjacent flaps (23 a , 23 b ) by a fold line located in the extension of that by which the panel (23) and the flap (24) are hinged between them, this blank being characterized in that : the contiguous portions of the panel (22) and flaps (23 a, 23 b) comprises, on either side of the associated fold line, a portion projecting from the free edge of this panel (22) or these flaps (23 a, 23 b), each projecting part being articulated on the projection contiguous with the corresponding fold line to form, after shaping of the blank, a dihedral stacking and wedging, while cutout is formed at the corresponding position on the opposite side of the panel (22) and flaps (23 a, 23 b) and associated parts (24, 25 a, 25 b) have a complementary shape to the associated part (24, 25 a , b ) forming flaps or part of flaps; and the panel (22) and the flaps (23 a, 23 b) have a complementary shape to the associated part (24, 25 a, 25 b) forming flap. A method of manufacturing blanks according to claim 1 or claim 2, characterized in that the blanks are cut and returned in a nested position in one another in the same plate of the semi-rigid material of which they are made. Packing of the type tray or tray made by shaping a blank according to claim 1, with covering and assembly together, by bonding in particular, said flaps (3 a , 3 b ), on the one hand, and the flap ( 4) and the flap parts (5 a, 5 b) on the other hand. Packaging according to claim 4, characterized in that it comprises an opening (6) between the flaps (4) and flap parts (5a, 5b) assembled. Packaging of the type tray or tray made by shaping two identical blanks according to claim 2 and assembly, by bonding in particular, the flap (24) and the flap portions (25 a , 25 b ) of each of them, contiguous positioning of the two resulting structures, with covering, on the one hand, the flaps (23 a , 23 b ) of one and the flaps (23 b , 23 a ) of the other, and secondly , the flap portions (25 a, 25 b) of one and flap portions (25 b, 25 a) from each other, and joining them to these flap portions and these flap portions, by collage especially. Packaging according to claim 6, characterized in that it comprises an opening (26) between the flaps (24) and the flap portions (25 a, 25 b) assembled.

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