FR2742419A1 - Blank for cardboard packaging box - Google Patents

Abstract

The blank forms a parallelpipedal box with a length (L), a width (w) and a height (h). The blank has a main section with a length equal to twice L plus w and a width equal to the height (h) of the box and has fold lines to allow folding of the blank to form the box. The main section has, at one of the ends with a dimension equal to the height, a foot to be glued to the other end of the main section, after folding and gluing of the blank on the fold lines extending transversely on the main section to form a sleeve forming four panels, two of which have a width (w) and height (h), and two panels of height (h) and length (L).

Description

OPENING FOR EASY CARDBOARD CASE
ITS COMPACTION AFTER USE.

 The present invention relates to packaging and more particularly to strong cardboard boxes intended for packaging chemicals. More particularly the invention relates to the opening of these boxes and their disposal after use.

 The packaging of chemicals or pulverulent products requires receptacles that can withstand strong shocks. I1 is provided that the receptacles can fall from a height greater than 1 meter without the receptacle being damaged in order to prevent its contents from spilling out. When making cardboard packaging, the boxes are therefore made of cardboard with high tear resistance.

 In order to facilitate the opening of these cases, the manufacturers have proposed various devices incorporated in the cases to allow easier opening. Such devices are described in particular in US patents 2,854,184, 2,970,743 or 3,606,135 or in European patent 666,218. Some manufacturers have also used tapes, for example of polyester incorporated in the carton and serving as a tape. uprooting.

 The invention proposes to provide a receptacle which is easy to open and easy to compact after use. In fact, after use, the boxes are piled up in premises or placed in dumpsters for their subsequent destruction. The large volume occupied by empty boxes means that relatively large premises must be provided.

Very often, the user tries to reduce the volume occupied by the empty box by cutting it with a tool or by trying to crush it by walking on it.

 According to the invention, the blank intended for the production of the box comprises two devices facilitating the cutting of the box and each arranged at one of the ends of this box, one facilitating the opening of the box and the other allowing easy compaction of this box.

Other advantages will appear on reading the following description made with reference to the appended drawing in which
Figure 1 shows a first embodiment of a blank according to the invention;
Figure 2 shows a perspective view of the box obtained with the blank shown in Figure 1 after formation and just before bonding
Figures 3A and 3D show the mode of use of the boxes according to the invention
Figure 4 shows another embodiment according to the invention
Figure 5 shows an embodiment similar to that of Figure 4 showing possible variants
Figure 6 shows in perspective the box obtained from the blank shown in Figure 5 after its formation and just before the gluing operation
Figure 7 shows another embodiment according to the invention.

 As can be seen in FIG. 1, the invention relates to a cardboard blank 10 intended for the production of a box of the "American box" type. The blank has a rectangular main part formed by the juxtaposition of four panels separated by upsets allowing folding. Two main front 12 and rear 12 'panels and two side panels 14 and 14' form a sheath and serve to define the vertical walls of the body. A tongue 16 makes it possible to secure the side panel with the main panel located on the other side of the rectangular main part. The tongue 16 is, for example, glued to the part 16 'of the panel 12'.

Advantageously, the side panels are provided with an opening 32, 32 'intended to serve as a handle.

 The rear main panel 12 'is provided with an upper main flap 20 and a lower main flap 22'. The side panel 14 'is provided with an upper side flap 24 and a lower side flap 24'. The front main panel 12 is provided with an upper main flap 22 and a lower main flap 20 '. The side panel 14 is provided with an upper side flap 26 and a lower side flap 26 '. The series of upper flaps makes it possible to close the upper opening delimited by the main panels and the side panels and the series of lower flaps makes it possible to close the lower opening delimited by the main and side panels. The upper main flaps 20 and 22 and lower 20 ′ and 22 ′ respectively, are designed so as to overlap at least partially so as to be glued to one another in order to close the box. Advantageously, the dimension of the main flaps is such that these flaps completely overlap and completely seal the opening delimited by the main panels 12, 12 ′ and side panels 14, 14 ′. It is obvious that main flaps covering only partially the openings delimited by the sheath can also be used. In an advantageous embodiment, the cutting of the lower lateral flaps 24 'and 26' is at right angles. This arrangement facilitates the squaring of the body during its formation.

 For the formation of the box and in view of its easy recycling, the tongue 16 is glued on the zone 16 'of the main part of the blank 10. Usually, this operation is carried out in the blank manufacturing plant, the blanks being delivered flat folded in half. It is obvious that staples can also be used.

As seen in Figure 2 during the formation of the body, we separate the main panels 12, 12 'and side 14, 14' from each other as shown schematically in Figure 2. The side flaps of the 'one of the openings are then folded 900 between the main flaps. The main flaps are then folded 90 "so that they overlap. They are then joined to each other by glue.

 According to the invention, one of the main flaps of the series of upper flaps and of the series of lower flaps is provided, on the wall intended to be on the internal side of the body after the latter has been formed, with a wire ( 40) or strip having a tear resistance greater than the resistance of the cardboard. This wire (40) glued or included in the flap ensures the tearing of the cardboard when it is exerted on it practically perpendicular to the surface of the flap. It is obvious that this wire cannot serve as a device facilitating the opening that insofar as the main flap containing the wire is disposed outside the box and the part of this external main flap, located between the wire and the main panel to which this external main flap is attached, is not glued to the corresponding internal main flap.

 Advantageously, the external main flap 20, 20 ′ provided with its wire is also provided with notches 41 to 44, 41 ′ to 44 ′ located on either side of the wire 40 and also located at each end of the external main flap corresponding. These notches delimit tabs 45, 46, 45 ', 46' and allow easy gripping of the wire.

To make gripping the wire even easier, the main flap, located towards the inside of the box once it has been formed, is provided with a notch 45, 46, 45 ', 46' respectively, located opposite the respective tongue 47, 48, 47 ', 48' delimited by the notches. It is obvious that in another embodiment, the internal main flap may have a smaller dimension than that of the opening. This arrangement can make it possible to avoid sticking the part of the external main flap situated between the wire and the main panel to which it is articulated to the internal main flap and at the same time to "delimit" zones for gripping the wire 40 similar to the notches 45 , 46, 45 ', 46'. It is obvious that for manufacturing reasons the other main flaps 22, 22 'and side flaps 24, 26, 24', 26 'can also be provided with a wire. However, these portions of wire have no specific function. and are only there because their presence does not affect the functioning of the body and facilitates the manufacturing process. In Figure 1, these portions of son have not been shown to simplify the drawing.

 Figures 3A to 3D show the mode of use of the box according to the invention. Once the box has been formed as shown in Figure 2, it is filled with the items to be dispensed, then the second opening is closed and the external main flap is glued to the internal main flap.

When using this box, the operator grasps one of the tabs 47 or 48 of the external main flap (2) of the upper part of the box and pulls on this tab, which tears the cardboard and open the cash register. Once the box is opened,
Figure 3B, items can be removed and the contents of the box can be used. Once the cardboard box is empty, it can be discarded; however its size is maximum. In order to reduce the volume occupied by this box, the invention provided on the side opposite to the first opening, a device facilitating the opening of the bottom of the box. In the embodiment shown in Figures 1 to 3, the same device is used for the upper opening of the box and for the lower opening at the bottom of the box.

As seen in Figure 3C, the body is turned over so that it can have access to its bottom. The operator grasps one of the tabs 47 'or 48' and pulls on the wire so as to tear the cardboard and open the bottom of the cardboard. Once the opening has been made, he folds the cardboard as indicated by the arrow in Figure 3D. In this way the box occupies a smaller volume and one can pile up numerous boxes on top of each other.

 Figures 4, 5 and 6 show two other embodiments of a sidewall according to the invention. In these embodiments, the device facilitating the opening of the box consists of a tear line 30 or line of initiation of rupture having a suitable shape possibly associated with a particular cutout of the internal main flap 22. According to the invention l 'one of the main flaps of the series of lower flaps is provided with a tear line 30' or line of initiation of rupture.

The rupture initiation lines consist of a succession of cut areas alternating with uncut areas. In a particularly advantageous embodiment, the corrugated cardboard is of the 2.4 BE type and the cut areas have a length twice that of the uncut areas.

 As seen in Figures 5 and 6, the outer main flap of the upper series of flaps and the lower series of flaps is hinged on the same main panel, while in the embodiment shown in Figure 4, the upper main 20 and lower 20 'external flaps are articulated on different main panels 12 and 12' respectively. It is obvious that the tear lines can have identical shapes or different shapes.

 Figure 7 shows yet another embodiment. In this embodiment, the tear wire is not located on the flaps as in the embodiment of Figures 1 and 2. The tear wire 40, 40 'is provided on the main rectangular part of the blank. The wire 40 allows the opening of the box for the use of its contents. The wire 40 'located near the other opening allows easy compacting of the box once its contents have been used. It is obvious that during the bonding operation of the tongue 16 on the corresponding part 16 of the main panel 12 ', care will be taken not to stick the tongues 47 and 47' used for gripping the wire.

It is obvious to a person skilled in the art that this principle can be applied to types of boxes which are not parrallelepipeds, such as for example octahedra, dodecahedra or others. Under these conditions the number of device for opening the faces can be greater than two and these devices can be on non-facing faces so as to allow easy compacting of the body.

Claims (13)

1 - Blank for cardboard box with six faces in the shape of  rectangular parallelogram of length L, width w and  height h, on the one hand having a main part  having a length practically equal to 2 (L + w) and  a width equal to the height h of the body and being  provided with discharges so as to allow folding  blank to form the box, the main part  being provided at one of its ends with  dimension equal to the height h, of a leg intended for  be glued to the other end of the part  main so that this main part,  after gluing and folding of the blank according to the upsets  arranged transversely on this main part,  forms a sheath defining four panels of the  body, two side panels of width w and  height h and two main panels of length L and  of height h, this sheath defining two openings  opposite of the body, and on the other hand presenting two  series of at least two flaps arranged on one side and  else from the main part and articulated on this  last through push-backs for, once the  formed box, close the two opposite openings of  this box, each series of flaps including at  minus one outer main flap and one flap  main interior, each main flap having a  surface intended to cover a substantial part  of the surface of the respective opposite openings of  the body and to be secured with the other flap  main of the same series to close the opening  checkout counter, blank in which is  incorporated a first device facilitating the opening  of the box and intended to cut a flap  main exterior in order to be able to bring the  portions of the body forming the side containing the  main flap in the plane of the other faces of the  box, blank, characterized in that it comprises:  a second device intended to cut the other  main outer flap so that the  portions of the crate forming the container side  the other main flap in the plane of the other faces  from the cash register. 2 - blank according to claim 1, wherein the flap  main exterior on which the first is placed  device and the other outer main flap on  which is arranged the second device are attached  at the same main panel. 3 - blank according to claim 1, wherein the flap  main exterior on which the first is placed  device and the other outer main flap on  which is arranged the second device are attached  to a different main panel. 4 - Blank for cardboard box with six faces in the shape of  rectangular parallelogram of length L, width w and  height h, on the one hand having a main part  having a length practically equal to 2 (L + w) and  a width equal to the height h of the body and being  provided with discharges so as to allow folding  blank to form the box, the main part  being provided at one of its ends with  dimension equal to the height h, of a leg intended for  be glued to the other end of the part  main so that this main part,  after gluing and folding of the blank according to the upsets  arranged transversely on this main part,  forms a sheath bounded by four panels of the  body, two side panels of width w and  height h and two main panels of length L and  of height h, this sheath defining two openings  opposite of the body, and on the other hand presenting two  series of four flaps arranged on either side of  the main part and articulated on this last  thanks to upsets for, once the box  formed, close the two opposite openings of this  body, each series of flaps comprising two flaps  side, one main outer flap and one flap  main interior, each main flap having a  surface covering a substantial part of the  surface of the respective opposite openings of the  body, blank in which a first is incorporated  device facilitating the opening of the box and  intended to cut the main part in the vicinity  immediate of one of the series of flaps so that  facilitate opening of the box, characterized blank  in that it includes:  a second device intended to cut the part  main in the immediate vicinity of the other series of  flaps to provide easy compaction of the  checkout. 5 - blank according to any one of claims 1 to 4,  in which the first device and the second  device are identical to each other. 6 - blank according to any one of claims 1 to 4  in which the first device and the second  device are different from each other. 7 - blank according to any one of claims 5 or 6,  in which at least one of the devices is composed  a wire placed on the inside of the body  or embedded in the carton and whose resistance to  breakage is greater than tear resistance  cardboard. 8 - blank according to any one of claims 5 or 6,  in which at least one of the devices is composed  of a breaking line. 9 - blank according to claim 8, for the realization  of a corrugated cardboard box, characterized in that  the rupture initiation line consists of a  succession of cut zones alternating with zones  not cut. 10 - blank according to claim 9, wherein the carton  corrugated is of type 2.4 BE and the cut areas have  double the length of the uncut areas. 11 - Box made from a blank according to one  any of the preceding claims. 12 - Cardboard box with six faces in the shape of  parallelepiped comprising:  a first device disposed on a first of  sides of the body to facilitate opening of this  first side and suitable for dividing this first  face in individual elements articulated on a single  other side of the body; and  a second device arranged on a second face  of the body, opposite the first face, to  facilitate the opening of this second face and adapted  to divide this second face into elements  individual articulated on only one other side of the  body to allow easy compaction of this  checkout. 13 - Cardboard box comprising:  a first device disposed on a first of  sides of the body to facilitate opening of this  first side and suitable for dividing this first  face in individual elements articulated on a single  other side of the body; and  at least a second device arranged on a  second side of the box to facilitate opening  of this second side and suitable for dividing this  second side in individual elements articulated on  only one other side of the body to allow a  easy compaction of this box.