EP1405801A1 - Package made of corrugated cardboard having vertical walls in stacked position - Google Patents

Abstract

The corrugated cardboard packaging comprises vertical lateral walls (32,36) and walls perpendicular to the lateral walls on which they are articulated, by scorings (12,18). Each of the lateral walls comprise zones of least resistance (58,60) to vertical compression which extend along the scorings. In the lateral walls and zones of least compression resistance the cardboard grooves are horizontal.

Description

The invention relates to corrugated packaging, which have walls arranged vertically in the stacking position. The invention more particularly relates to improvements made to such packagings, with a view to posting articles conditioned the load exerted vertically on these packages.

In its patent application FR-A-2 814 147, the Applicant has already described, for the same purpose, a packaging of the type comprising vertical side walls and horizontal walls that are hinged on the vertical walls by horizontal fold lines, characterized in that on each of said vertical walls are formed foldable panels extending along said fold lines, said which are likely to bend spontaneously towards the interior of packaging, when it is subjected to vertical compression.

According to one embodiment, said sections are formed in marking on the vertical walls two grooves or perforainages parallel to the fold lines.

According to another embodiment, double sections are formed in the vicinity of the horizontal fold lines.

According to a third embodiment of the invention, the sections are consisting of crushing zones extending along the lines of folding.

In all these cases, said sections may initially be in the plane of the vertical walls, but we can also give them a low inclination to help them bend.

We understand that when the cardboard in the walls horizontally deforms and that, as a result, the horizontal wall top of the packaging tends to get closer to the bottom wall, this movement is accompanied by an inward folding of the pieces by relative to the plane of the vertical walls, or of an accentuation of the inclination in the case where the panels are initially inclined, the inclination of the panels being done until the products support actually the applied load. On the other hand, the vertical walls do not undergo no deformation and remain perfectly vertical and planar. So we can say that the pans behave like real localized deformation absorbers, which cash completely all the deformation of the horizontal walls and which prevent this deformation from being transmitted to the vertical walls.

Thanks to the above-mentioned arrangements, it is possible to use relatively light cartons, without risk of weakening the sidewalls packaging, and thus save material.

Foldable panels of FR-A-2 814 147 packings constitute areas of least resistance to vertical compression, lending to local deformation which does not affect the side walls vertical of the package. This earlier application also indicates that areas of least resistance to vertical compression may be obtained by local crushing of the corrugated board.

In continuing its work, the Claimant has established that using, for the realization of vertical walls and zones of associated local deformation, a corrugated board whose grooves are arranged horizontally, the deformation is considerably facilitated. areas of local deformation.

The invention therefore relates to a carton packaging corrugated material having sidewalls to be arranged vertically and walls perpendicular to the preceding, on which they are articulated by ups and downs forming lines of horizontal folding, each of said sidewalls having areas of least resistance to vertical compression, which extend along the said ups or parallel to these, this packaging characterized in that in the side walls and in the zones of lower vertical compressive strength, the flutes of the corrugated cardboard are oriented horizontally.

Note that this horizontal arrangement of the flutes of the corrugated cardboard, in the walls intended to be placed vertically in course of use, goes against the teachings of the technique earlier. According to the known technique, with a view to reinforcing the resistance to the vertical compression of packaging intended to be stacked, the flutes of the vertical walls are systematically vertically oriented, to act as so many vertical reinforcements. This is, moreover, illustrated by the aforementioned patent application, in the figure 1 of which the corrugated corrugations are represented with a vertical orientation.

The Applicant has established that by laying horizontally corrugated corrugations of the vertical walls, considerably the mechanical resistance and rigidity of the parts angle of these walls, which form vertical dihedrons, so that, when loading on a pallet a lot of packaging thus perfected and surround it with a stretchable plastic film or retractable, we avoid local deformations that manifest themselves usually following the vertical edges of the packages in contact with the movie.

As discussed above, areas of least resistance to vertical compression can be foldable sections, like those previously described by the Applicant, but may also be of a different type, as will be seen in the detailed description which following of the invention, in which reference will be made by way of examples, to the attached schematic drawings.

La figure 1 est une vue en perspective d'une caisse en carton ondulé du type à rabats conforme à l'invention ;

La figure 2 est une vue en plan du flan de carton ondulé prédécoupé et refoulé dont est issue la caisse de la figure 1, montrant les refoulages qui sont ménagés pour y définir des pans pliables ;

La figure 3 est une vue en élévation latérale de l'emballage de la figure 1 ;

Les figures 4 à 17 sont des vues analogues à la figure 3 d'autres emballages conformes à l'invention ;

Les figures 15 et 19 sont des vues de détail illustrant des modes d'affaiblissement complémentaires des zones de moindre résistance à la compression verticale.

On these drawings:

Figure 1 is a perspective view of a corrugated cardboard box flap type according to the invention;

Figure 2 is a plan view of the corrugated cardboard blank pre-cut and discharged from which the box of Figure 1, showing the ups and downs which are formed to define foldable panels;

Figure 3 is a side elevational view of the package of Figure 1;

Figures 4 to 17 are views similar to Figure 3 other packaging according to the invention;

Figures 15 and 19 are detail views illustrating complementary modes of weakening areas of lower resistance to vertical compression.

Reference will first be made to FIGS. 1 to 3, which illustrate the invention. in its application to a flap box, but it must be heard that the invention applies equally well to any other type of packaging intended to be stacked.

The box shown in FIG. 2 is made from the blank in carton 10 shown in Figure 1. As described in FR-A-2 814,147, this blank is substantially rectangular and comprises two longitudinal fold lines 12, 14, extending over the entire length of the blank, equidistant from the longitudinal edges. Internally by relative to these fold lines and in the vicinity of these are marked respectively two creases or perforainings 16, 18, which define with these lines of the bands, respectively 58 and 60, which form the foldable panels described in the aforementioned patent application.

On the central band of the blank which lies between the lines of 12, 14, are marked four transverse fold lines 20, 22, 24, 26, perpendicular to the longitudinal fold lines. On the outer carton strips at the longitudinal fold lines are cut six notches 28, respectively aligned with the lines of transverse folding 22, 24, 26. The longitudinal fold lines and crosswise define on the central strip two walls longitudinal 30, 32, alternating with two transverse walls 36, 38, and a glue tab 39. These walls 30, 32, 36, 38 are intended for be upright when using the crate. The cuts 28 define on the outer strips four inner flaps 40, 42, and 44, 46, which are respectively articulated on the walls transverse 36, 38, and four outer flaps 48, 50, and 52, 54, which are respectively articulated on the longitudinal walls 30, 32.

In accordance with the invention, and against the uses of the technical, the corrugated corrugations of which the box is made horizontally disposed in the sidewalls 30, 32, 36 and 38, when these are in a vertical position, as well as on the panels foldable.

The formatting of the box is done as described in the previous application, by wrapping the blank by folding along the lines of transverse folding 20, 22, 24, 26, then gluing the glue tab 39 on the end of the longitudinal wall 32, so as to form a parallelepipedal volume. The inner flaps 40, 42, 44, 46 are then folded towards the inside of this volume around the fold lines longitudinal 12, 14, and arranged perpendicular to the walls adjoining transverse sections 36, 38. Similarly, the outer flaps 48, 50, 52, 54 are folded around the longitudinal fold lines 12, 14 and stuck on the inside flaps. At the same time as she performs the folding of each of the outer and inner flaps, the setting machine shape folds from a low angle α inwards (see Figure 1) the strips 58 and 60 which are respectively between the fold lines longitudinal members 12, 14, and associated creases or perforains 16, 18.

As can be seen in FIG. 1, in the box thus produced, the strips 58 and 60 form sloping sections along the eight edges horizontal of the box.

When many of these crates are stacked, there is a carton packing in the inner and outer flap areas who are in contact with funds from other funds. These deformations of the carton cause the upper bottom 40, 44, 48 to 52 of the lower bottom 42, 46, 50, 54. This translates into a accentuation of the inclination of the panels 58, 60, lying on all vertical sides of the body, in relation to the plane of these faces and a slight offset to the outside of the side walls.

By bowing more, the sides 58, 60 therefore accompany the deformation of the funds and cash the entirety of this deformation, this phenomenon is greatly enhanced by the fact that the flutes of the corrugated cardboard sections 58 and 60 are arranged horizontally, which greatly facilitates the deformability of these sections, while that the side walls 30, 32, 36 and 38 of the body remain perfectly flat and vertical.

As stated in the aforementioned patent application, it is not it is not necessary to impose on sections 58 and 60 an initial inclination relative to adjacent walls and flaps, because the faces tend to bow, even if they are initially in the plane of the side walls Attached.

Instead of simple foldable sections, we can also use double panels or multiple panels, as stated in the application aforementioned patent.

Finally, as already stated in this previous application, the sections foldable can be replaced by zones whose weakening the vertical compressive strength is obtained by crushing the corrugated cardboard.

The package which has been described with reference to FIGS. therefore inclined faces 58 and 60, in the upper and lower parts of the packaging, resulting from the presence of a grooving or perforainage horizontally or a crushing zone of the corrugated cardboard.

Many other forms of achievement, within the framework of the application FR-A-2 814 147 above, may include, in accordance with the present invention, vertical walls whose grooves corrugated cardboard are oriented horizontally. Some of them are illustrated in particular by Figures 3 to 17 and will be presented briefly below:

Figure 4: inclined faces 4a, obtained by addition of a creasing or additional perforainage or zone of crushing in the bottom of the package, and zones 4b of weakness in the plane of the vertical walls at the top, obtained by adding additional creasing or perforainage or a crushing zone.

Figure 5: 5 weakening zones in the plane of the vertical walls of the bottom of the package, obtained by creasing or additional perforainage or a crush zone, and inclined faces 5b, obtained by addition of a creasing or additional perforainage or a crushing zone at the top.

Figure 6: zones of weakening 6 a , 6 b , in the plane of the vertical walls, in the top and the bottom of the packaging, obtained by adding a crease or a supplementary perforainage or a zone d 'crushing.

Figure 7: weakening zones 7 a, 7 b, 7 c, in the plane vertical walls, in the upper and lower parts of the packaging and in an intermediate zone obtained by addition of creases or additional perforainages or crushing zones, with a cutout 7 d formed in the intermediate zone to allow the deformation of the corrugated cardboard.

Figure 8: weakening zones 8 has, in the plane of the vertical walls in the bottom of the package, obtained by addition of creasing or additional perforainage or a crush zone, and double weakened zones 8 b in the plane of the vertical walls in the upper, obtained by addition of two creases or two additional perforainages weakening or creasing and an additional perforainage.

Figure 9: 9 weakening zones in the plane of the vertical walls at the top of the package, obtained by addition of a creasing or additional perforainage or a crush zone, and double zones 9b weakening, in the plane of the vertical walls at the bottom, obtained by adding two creases or two additional perforainages or creasing and additional perforainage.

Figure 10: double zones of weakening 10 a , 10 b in the plane of the vertical walls, in the top and the bottom of the package, obtained by adding two creases or two additional perforainages or additional perforainage.

Figure 11: Double weakening zones 11 in the plane of the vertical walls, above, obtained by addition of two creases or two additional perforainages or creasing and an additional perforainage, and inclined faces 11 b in the bottom of the package, obtained by adding a crease or additional perforainage or a crushing zone.

Figure 12: Double weakened zones 12a in the plane of the vertical walls at the bottom, obtained by addition of two creases or two additional perforainages or creasing and an additional perforainage, and inclined faces 12 b, the top of the package, obtained by adding a crease or additional perforainage or a crushing zone.

Figure 13: Double inclined weakened zones 13a, 13b, obtained by addition of two creases or two additional perforainages or creasing and an additional perforainage in the top and bottom of the package.

Figure 14: Double weakening angled zones 14a in the bottom of the package, obtained by addition of two creases or two additional perforainages or creasing and an additional perforainage and weakened zones 14 b in the plane of the vertical walls at the top.

Figure 15: Double inclined weakened zones 15a in the top of the package, in the plane of the vertical walls, obtained by addition of two creases or two additional perforainages or creasing and an additional perforainage, and weakened zones 15 b in the plane of the vertical walls at the bottom.

Figure 16: Double inclined weakened zones 16a in the bottom of the package, obtained by addition of two creases or two additional perforainages or creasing and an additional perforainage, and double weakened zones 16 b in the plane of the vertical walls at the top, obtained by the addition of two additional creases or two additional perforations or creasing and perforainage.

FIG. 17: double attenuation zones inclined 17 a at the top of the package, obtained by addition of two additional creases or two additional perforations or creasing and perforainage, and double zones of weakening 17 b in the plane of the vertical walls at the bottom, obtained by adding two or two additional creases or creasing and additional perforainage.

Of course, the embodiments that have just been evoked have no limiting character.

As shown in Figures 18 and 19, which are views parts corresponding to the portion of Figure 1 surrounded by a circle, the indentations 28 which separate the contiguous flaps 44 and 52 of the FIG. 1 can naturally have different shapes.

The invention thus brings a considerable improvement to the the packages which are the subject of the patent application FR-A-2,814,147, this improvement does not, however, result in any manufacturing cost additional, since it simply implies an orientation particular, but contrary to the teachings of the technique front, corrugated corrugations of the vertical walls of these packaging.

Claims (7)

Corrugated cardboard packaging comprising side walls (30, 32, 36, 38) to be arranged vertically and walls perpendicular to the preceding ones, on which they are articulated by upsets (12, 18) forming horizontal fold lines, each said sidewalls having areas (58, 60) of least vertical compressive strength which extend along or parallel to said ups and downs, said package being characterized in that in the sidewalls (30, 32, 36, 38) and in areas (58, 60) of lower vertical compressive strength, the flutes of the corrugated board are oriented horizontally. Packaging according to claim 1, characterized in that at least some areas of lower resistance to vertical compression are formed by sections (58, 60) inclined relative to the adjacent vertical walls (30, 32, 36, 38). Packaging according to claim 1, characterized in that at least some areas of lower resistance to vertical compression are constituted by double or multiple sections inclined relative to the adjacent vertical walls (30, 32, 36, 38). Packaging according to one of claims 2 and 3, characterized in that the inclined faces (58, 60) are contiguous to the horizontal fold lines by which the vertical walls (30, 32, 36, 38) are hinged to other parts or elements (40, 42, 44, 46, 48, 50, 52, 54) of the package. Packaging according to one of claims 1 to 4, characterized in that at least some areas of lower resistance to vertical compression are located in the plane of the associated vertical walls (30, 32, 36, 38). Packaging according to claim 5, characterized in that at least some areas of least compressive strength comprise two or more parts separated from each other by creases or perforainages arranged horizontally. Packaging according to one of claims 1 to 6, characterized in that at least some areas of lower resistance to vertical compression result from a local crushing of the corrugated cardboard.

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