EP2007635B1 - Display container with telescopic lid - Google Patents

Description

The present invention relates to a corrugated cardboard single-piece blank for the manufacture of a display case comprising a belt comprising at least four main rectangular shutters connected together in pairs by parallel fold lines, and provided with two sets of flaps located on either side, suitable for forming respectively at least partially the bottom and the top of the body.

It also relates to a box obtained with such blank and the method and the device for manufacturing the box from this single-piece blank.

The present invention finds a particularly important, although not exclusive, application in the field of packaging for rigid or semi-rigid products such as soft cardboard cases, packages or bags, making it easy to present the products in or outside the box. their transport packaging in an immediate, clean and attractive way, especially on the shelves of supermarket shelves.

We already know ( EP 0 637 548 ) packing boxes allowing separation of the upper part of the box with respect to the lower part and therefore allowing use either as a transport case and sometimes after tearing the cover as a display.

Such a box is formed from two blanks and has the disadvantage of not being easily formable automatically. It also requires two different blank feed magazines during assembly or assembly of the box.

Flap displays made from a single cardboard blank are also known. It has faces or side panels pre-cut after tearing said panels to obtain a display effect for the part retaining the products. Such a type of single-blank packaging, however, has a weakened constitution due to the very existence of precut line of low tensile strength and also does not allow sufficient quality of presentation and reliable, because of the tearing of the pre-cut portion which can be done unequally. The document FR 2,875,218 describes a blank and a box according to the preambles of claims 1 and 6. The document DE 28 43 506 discloses a device and method for manufacturing a telescopic lid container from a one-piece blank.

claims 1 and 6. The document DE 28 43 506 describes a device and a method of

The present invention aims to provide a blank, a box, a method and a device that responds better than those previously known to the requirements of the practice, particularly in that it allows automatic assembly at a high rate (greater than twenty cases per minute). ), while having a high strength and a rate of poorly formed crates almost zero, crates thus obtained by the invention are also easily put on pallet and allowing after opening an excellent quality of presentation, repetitively.

With the invention it thus becomes possible to produce a package, very economical, which can be transformed into a display shelf, by simply separating glue points, without requiring the removal of pre-cut areas during installation, while using only one blank.

The fact of using only one blank while avoiding the disadvantages of the prior art related to the embrittlement of pre-cut lines has indeed many advantages.

Thus it is necessary to provide only one cutting tool, only one cardboard reference to manage, while obtaining an optimized palletizing blanks, and this with a single store to load into the training machine.

For this purpose, the present invention proposes in particular a single-piece corrugated cardboard blank for the manufacture of a display case comprising a belt comprising at least four main rectangular flaps, connected together in pairs by parallel fold lines, and provided with two sets of flaps located on either side, suitable for respectively forming at least partially the bottom and the top of the box, characterized in that the belt comprises a pre-cut transverse line for splitting the blank into two half-blanks , said transverse line determining on each side and for each parallel fold line, two separate fold line portions offset relative to each other to allow at least part of the catching of the thicknesses of cardboard during coating the second half-blank on the first half-blank around a mandrel.

By pre-cut transverse line, we mean a line of attachment between the two half flanks which can be done by a few points of attachment between them, and are therefore easily tearable from each other in the plane and / or perpendicular to the plane of the blank.

• La ceinture de volets comporte un premier volet central relié de part et d'autre à un second et à un troisième volet par deux des lignes de pliage parallèles, dites premières lignes de pliage, les portions de premières lignes de pliage du premier demi flan étant décalées vers l'intérieur du premier volet par rapport aux portions des mêmes premières lignes de pliage du second demi flan, et les deuxième et troisième volets sont eux même reliés vers l'extérieur à un quatrième volet ou à une languette de collage, par deux autres desdites lignes de pliage parallèles, dites secondes lignes de pliage, les portions de secondes lignes de pliage du premier demi flan étant décalées vers l'intérieur des deuxième et troisième volets par rapport aux portions des mêmes secondes lignes de pliage du second demi flan;
• le décalage entre portions d'une même première ligne de pliage est d'une épaisseur ou sensiblement d'une épaisseur de carton et les décalages entre portions d'une même seconde ligne de pliage est de deux épaisseurs ou sensiblement de deux épaisseurs de carton;
• deux volets opposés comportent chacun une ouverture sensiblement centrale disposée à proximité de la ligne prédécoupée transversale, agencée pour permettre la désolidarisation par pression ou traction d'un demi flan par rapport à l'autre après collage de l'un sur l'autre;
• la ligne prédécoupée transversale comporte une partie en forme de trapèze permettant d'obtenir un présentoir à parois latérales inclinées.

In advantageous embodiments, one or more of the following provisions are also used:

• The flap belt comprises a first central flap connected on both sides to a second and a third flap by two parallel fold lines, called first fold lines, the first fold line portions of the first half flank being shifted inwardly of the first flap relative to the portions of the same first fold lines of the second half-blank, and the second and third flaps are themselves connected outwardly to a fourth flap or to a gluing tab, by two other of said parallel fold lines, said second fold lines, the portions of second fold lines of the first half-blank being shifted inwardly of the second and third flaps with respect to the portions of the same second fold lines of the second half-blank;
• the offset between portions of the same first fold line is of a thickness or substantially of a carton thickness and the offsets between portions of the same second fold line is two thicknesses or substantially two thicknesses of cardboard;
• two opposite flaps each comprise a substantially central opening disposed near the transverse precut line, arranged to allow the separation by pressure or pulling a half blank compared to the other after gluing one on the other;
• the transverse precut line comprises a trapezoid-shaped portion for obtaining a display with inclined sidewalls.

The invention also proposes a box obtained with a blank as described above.

It also proposes, and more precisely, a packing box formed from corrugated sheet material, comprising two elements that are manually separable from one another, namely a first shelf-display element and a second element forming the part. upper body, the first and second elements being obtained from a single blank comprising a belt comprising at least four main rectangular flaps, connected together in pairs by parallel fold lines, and provided with two series of flaps located on either side, suitable for respectively forming at least partially the bottom and the top of the box, characterized in that the two elements are inserted into one another, in that the two elements are secured to each other. to one another by at least one point of glue and in that the belt comprises a pre-cut transverse line defining the distal edges of the two elements etts for splitting the blank into two half-blanks to form said two elements, said cross-section determining on each side and for each parallel fold line two separate fold line portions offset from each other. to allow at least part of the catching up of cardboard thicknesses during coating the second half-blank on the first half-blank around a mandrel to form said box.

Advantageously, the transverse precut line comprises a trapezoid-shaped portion for obtaining a display with inclined sidewalls.

Also advantageously two opposite flaps each comprise a substantially central opening disposed near the transverse precut line arranged to allow the separation by pressure of one element relative to the other after bonding one on the other.

This pressure of one half-blank relative to the other, exerted perpendicularly to the walls, is low and corresponds to a force of a few newtons, for example less than of the order of 10, see 5 newtons, see 2 or 1 newtons .

On the other hand, the separation of the lid with respect to the tray in the direction parallel to the walls is difficult, the friction forces related to the bonding of one on the other well resistant to shear stresses.

The invention also proposes a method for producing a packing box with a polygonal cross-section from a corrugated sheet mono-blank, comprising a belt comprising at least four main rectangular flaps, connected to one another two by parallel fold lines, and provided with two sets of flaps located on either side, suitable respectively to form at least partially the bottom and the top of the body, said belt comprising a pre-cut transverse line for splitting the blank in two half-blanks, characterized in that after unstacking the blank, separating the two half-blanks, depositing the first half-blank in a transfer channel, the second half-blank being held in a plane greater than that of said transfer channel, the first half-blank is transferred to a mandrel in during the passage, the first half-blank is wrapped around the mandrel, the transfer channel then being configured to allow the transfer of the second half-blank, said second half-blank is lowered onto the channel, the second half-blank is transferred to the second half-blank, mandrel and is wrapped around the first half-blank itself wrapped around said mandrel, to form the side walls of the body, before folding the flaps around said mandrel to form the bottom or the upper part of the body.

Advantageously, the half-blanks are separated by shearing fingers.

Also advantageously, the transfer of the half-blanks is obtained by finger (s) pusher (s), the coating around the mandrel being made by plating a flap of the belt of the half-blank concerned on the inner face of the mandrel, then coating and pressurizing the lateral flaps by retractable device embedded on the flap coating system.

The invention also proposes a device for forming a box from a corrugated sheet mono-blank, comprising a belt comprising at least four main rectangular flaps connected together in pairs by parallel fold lines. , and provided with two sets of flaps located on either side, suitable for respectively forming at least partially the bottom and the top of the box, said belt comprising a pre-cut transverse line for splitting the blank into two half-blanks, characterized in that it comprises an unstacking assembly of the blank, a half-blank separating system, one of the another, a transfer channel of the first half-blank to a mandrel, the second half-blank being held in a plane greater than that of said transfer channel, means for gluing the first half-blank when transferring to a mandrel, means coating the first half-blank around said mandrel, means for configuring the transfer channel to allow transfer of the second half-blank to said mandrel, elevator means for lowering said second half-blank onto the channel, coating means around the first half-blank itself encased around said mandrel, to form the belt of the body, and plating means arranged to fold the flaps around said mandrel to form the bottom or the upper part of the box.

Means for ejecting the packaging thus formed are then also provided.

• La figure 1 est une vue en perspective d'un emballage selon un premier mode de réalisation de l'invention.
• La figure 2 est une vue en perspective de l'emballage de la figure 1 après séparation, montrant l'élément formant présentoir.
• La figure 3 est une vue en plan du flan mono-pièce permettant l'obtention de l'emballage de la figure 1.
• La figure 4 est une vue en plan d'un flan mono-pièce selon un autre mode de réalisation de l'invention.
• Les figures 5 à 11 montrent en perspective les étapes de formation de l'emballage de la figure 1 selon le mode de réalisation de l'invention plus particulièrement décrit ici.
• Les figures 12, 14, 16 et 18 ét les figures 13, 15, 17 et 19 montrent respectivement en vue de dessus et en vue latérale, un dispositif de formation de l'emballage selon l'invention.

The present invention will be better understood on reading the following description of embodiments given as non-limiting examples. The description refers to the accompanying drawings in which:

• The figure 1 is a perspective view of a package according to a first embodiment of the invention.
• The figure 2 is a perspective view of the packaging of the figure 1 after separation, showing the display element.
• The figure 3 is a plan view of the single-piece blank for obtaining the packaging of the figure 1 .
• The figure 4 is a plan view of a single-piece blank according to another embodiment of the invention.
• The Figures 5 to 11 show in perspective the steps of training the packaging of the figure 1 according to the embodiment of the invention more particularly described here.
• The Figures 12, 14 , 16 and 18 and the Figures 13, 15 , 17 and 19 show respectively in top view and side view, a device for forming the package according to the invention.

The figure 1 shows a parallelepiped box 1 made of corrugated cardboard, for example 3 mm thick comprising a belt 2 having four rectangular walls 3.

The box is composed of two elements, namely a lid member 4 comprising flaps 5 constituting the perforated top 6 of the box and a display tray 7 provided with a bottom 8 advantageously consisting of one or more flaps covering 9 and having (cf. figure 2 ) an open front side face 10 and adjacent side faces 11 cut at an angle to better present the objects contained in the box (not shown). The lid fits on the tray display at least partially through an offset between fold lines 12 and 13 respectively forming the edges of the tray and the cover, allowing the embedding of one in the other or the other in one. On the figure 1 we have represented the lid as capering the tray but this may very well be the opposite.

We will now describe more precisely with reference to the figure 3 , the one-piece blank to obtain the cash register Figures 1 and 2 .

The blank 14 comprises the belt 2 comprising four flaps 15, 16, 17 and 18 adapted to form the rectangular walls 3, and a tab or gluing tab 19 of substantially rectangular end.

The belt 2 comprises a pre-cut transverse line 20 separating the blank into two half-blanks 21 and 22 which hold together only by a few attachment points and which, therefore, are easily removable from one another in the plane and / or perpendicular to the plane of the blank.

In the embodiment of the figure 3 , the precut line 20 has a first portion 20 'parallel to the lower edge 23 of the end flap 15, which also extends to a first portion of the adjacent flap 16, then a second portion at an upward bias 20'', on for example, the 2/3 of the flap, extended by a third portion 20 '''again parallel to the lower edge 23 of the flaps on a second portion of the flap 16, on the entire central flap 17 and on a first portion of the last flap 18 to descend obliquely 20 '', symmetrically to the flap 16 and terminate parallel to the lower edge on the last portion 20 'of the flap 18 and on the gluing tab 19, so that the pre-cut line has a portion isosceles trapezoidal shape to obtain the display with inclined sidewalls 11 of the figure 2 .

According to the invention, each of the fold lines 24, 25, 26 and 27 connecting two by two and respectively the flaps 15, 16, 17, 18 and the tongue 19, have two portions 24 'and 24' '; 25 ', 25' '; 26 ', 26' 'and 27', 27 '' determined on either side of the transverse line 20, offset relative to each other to allow the catching of the thicknesses of cardboard during the coating of the second half blank on the first half blank around a mandrel or vice versa. More precisely, the one-piece blank 14 comprises the first central flap 17, connected on either side to the second flap 16 and to the third flap 18 by first parallel fold lines 25 and 26, the portions 25 'and 26' lower fold lines corresponding to the first half-blank 21 being shifted inwardly of said first flap relative to the portions 25 '' and 26 '' of the second half-blank 22, a thickness of cardboard, or slightly less than the latter .

The second and third flaps 16 and 18 are themselves connected outwards to a fourth flap 16 on one side and to the gluing tab 19 of the other by first fold lines comprising in turn two lower portions. 24 'and 27' corresponding to the first half-blank and shifted towards the inside of the blank, that is to say towards the second and third flaps respectively relative to the second portions 24 '' and 27 "of the second half-blank 22 this two thicknesses of cardboard or substantially two thicknesses, so as to allow a coating of the second blank 22 on the first 21, as shown in FIG. figure 1 .

The belt of rectangular flaps further comprises, on both sides, connected by second fold lines 28, perpendicular to the first fold lines, two series of flaps, namely a first series 29 of flaps connected to the first half-blank 21 and a second series of flaps 30 connected to the second half-blank 22, said flaps being substantially rectangular and arranged to partially form at least the top and bottom of the body.

The first half blank 21 further comprises, on each of the two opposite flaps 16 and 18, a substantially central opening 31 disposed near the transverse precut line 20 which will allow the two half-blanks to separate from one another by pressure or traction of a half blank with respect to the other, after bonding one on the other which is done by two bonding points and / or bonding lines 32 easily separable, for example located on both sides other of said opening, and initially deposited facing said first half-blank.

By simple pressure is meant a pressure of one cut relative to the other by a force of a few newtons, for example less than of the order of 10 or even 5 newtons, sufficient to allow the delamination of the cardboard and / or the tearing off the lines of glue. More specifically, to separate the lid of the display, the user passes a finger in the opening and then clings to the other half blank that pulls outward.

We have shown on the figure 4 another embodiment of a blank 33 according to the invention which comprises a first half-blank 34 connected to the second half-blank 35 by a pre-cut transverse line 36 parallel to the second fold lines 37, so that the lower tray is found to be of parallelepipedal shape.

The first fold lines between first half blank and second half blank are shifted identically to what is described with reference to the figure 3 .

We will now describe the method of forming the body around a mandrel from the Figures 5 to 11 . After unstacking the blank, the two half-blanks 21 and 22 are separated from each other, for example by lateral traction in the direction of the arrow 40 of the first half-blank relative to the second half-blank. We coat ( figure 6 ) the first half-blank 21 around the mandrel (not shown) so as to form the lower part of the container (cf. figure 7 ). Then the second half-blank is brought opposite the end 41 of the first half-blank forming a tray, knowing that the first half-blank or the second half-blank has already been glued at the points of gluing, the latter being, remember it may then be easily detached by a user so as to separate the lid of the tray. We then coat ( figure 9 ) the second half-blank around the end of the first half-blank so as to form (cf. figure 10 ) wrapping around the mandrel by folding the last wall 15 of the second half-blank 22 and gluing on the tab 19 opposite.
Then the flaps 29 of the bottom of the tray are closed on the mandrel to form the bottom of the checkout. Finally, the packaging thus formed is ejected, for example by a jack located inside the mandrel. The open crate 1 can then, after setting vertically, be filled from above, before closing the flaps 30 of the top and transport.

We will now describe an embodiment of the device 50 implementing the method according to the embodiment of the invention more particularly described here, and shown schematically with reference to the Figures 12 to 19 with the flan of the figure 3 .

The device 50 comprises a set 51 for feeding blanks or single-piece blanks 14 intended to form the boxes.

This feed assembly 51 is known in itself and makes it possible to apprehend the blanks one by one by means of sucking suction cups 52 and then to tilt them onto a platform 53 on which the separation of the two half blanks will be able to be performed.

At the end of unstacking, the two half-blanks 21 and 22 are separated by fingers of four or six elements 54 indicated schematically but (not visible on the figure 12 because located under the blank) positioned and regularly distributed to the rights of the pre-cut line 57 constituted by the points of attachment. These elements are for example formed by flat metal rods retractable from below with a possibility of lateral pulling movement in the direction of the mandrel, which will be described below.

The first half-blank 21 is then deposited in a transfer channel 58, the second half-blank remaining above the channel placed on an elevator 59.

The channel comprises two guide rails 60, adjustable in distance relative to one another, to take into account the different widths of the half-blanks 21 and 22.

The first half-blank 21 is then transferred (cf. Figures 14 and 15 ) under the mandrel 62, provided with lower edges 63 and 64 upper by said transfer means comprising for example two tabs (not shown) which pass under the second half blank.

During the transfer, the bottom and the gluing tab are glued by gluing means known per se.

The first half-blank is then pushed to the fixed transfer stops 66 and plated under the mandrel by a movable plate or push plate 67.

The first half-blank 21 (cf. Figures 16 and 17 ) is then wrapped around the mandrel 62 by coating means, for example with a swinging arm, in a manner known per se, for example as described in the patent EP 0334 707 .

The accuracy of operation (correct positioning of the upper panel) is ensured by a retractable positioner (not shown) on which the upper panel rests when folding the bottom flaps and pressurize simultaneously the same bottom and the gluing paw.

During the coating of the first half-blank 21, the transfer channel 58 deviates in width (cf. figures 14 and 16 ) to adapt to the slightly larger size of the second half-blank 22, thanks to cylinders for example electric, so as to reach the skilled person.

This second half-blank 22 is then pushed forward by transfer cleats or jacks 67 (cf. figure 15 ) then descended via elevator 59 into the channel (cf. figure 17 ).

It is also possible, for example, rather to retreat the cleats to overcome the thrust just mentioned.

The second half-blank is then transferred under the chuck identically to the first half-blank by one or more of the pusher cleats.

During this second transfer, the two large panels are glued for subsequent assembly on the first half blank.

The tongue or glue tab is also glued. When reaching the stop, the second half blank 22 is pressed under the mandrel in contact with the first half blank by the push plate which had been re-erased.
The second half-blank is, in turn, coated in the same manner as indicated above.

A retractable positioner (not shown) acts on the corner of the box by pushing the top panel and the side panel adjacent to the gluing tab.

Then there is pressurized side panels and the tab by a retractable device embedded on the coating system (not shown) to allow gluing and, for example simultaneously, plating the flaps to form the bottom.

Finally, the body is ejected once completed by internal thrust on its bottom by means of internal pushing (here again not shown), the box then falling vertically to be filled. The connection of the side panels of the two half-blanks guarantees the solidarity of the two half-blanks during this ejection.

During the coating of the second half blank, there is closure of the transfer channel to the dimensions of the first half-blank and the unstacking of new mono-parts.

The cycle is then restarted with a new blank 14.

As is obvious and as also follows from the above, the present invention is not limited to the embodiments more particularly described. On the contrary, it encompasses all the variants covered by the claims and in particular those in which the tray part is coated on the lid part.

Claims (13)

1. One-piece blank (14, 33) made of corrugated cardboard for the production of a display box (1) comprising a girdle (2) including at least four rectangular main sections (15, 16, 17, 18) connected to one another in pairs by parallel fold lines (24, 25, 26, 27), and provided with two series (29, 30) of flaps situated on either side, suitable for forming respectively at least in part the bottom (8) and the top (6) of the box, where the girdle (2) comprises a pre-cut transverse line (20; 36) allowing the blank (14, 33) to be divided into two half-blanks (21, 22; 34, 35), characterised in that on either side and for each parallel fold line (24, 25, 26, 27) said transverse line defines two separate portions of fold line (24', 24''; 25', 25''; 26', 26''; 27', 27'') offset one in relation to the other to allow at least partial equalisation of the thicknesses of cardboard when the second half-blank (22) is wrapped over the first half-blank (21) around a mandrel.
2. Blank (14; 33) according to claim 1, characterised in that the girdle (2) of sections comprises a first central section (17) connected on either side to a second section (16) and a third section (18) by two of said parallel fold lines (25, 26), called first fold lines, the portions (25', 26') of first fold lines of the first half-blank (21) being offset towards the interior of said first section in relation to the portions (25'', 26'') of the same first fold lines of the second half-blank (22), and in that the second section (16) and the third section (18) are themselves connected towards the exterior to a fourth section (15) or to a gluing tongue (19), by two others of said parallel fold lines (24, 27), called second fold lines, the portions of second fold lines of the first half-blank (21) being offset towards the interior of said second section (16) and third section (18) in relation to the portions (24', 27') of the same second fold lines of the second half-blank (22).
3. Blank according to claim 2, characterised in that the offset between portions (25', 25'', 26', 26'') of a same first fold line (25, 26) is one thickness or substantially one thickness of cardboard and the offset between portions of a same second fold line (24, 27) is two thicknesses or substantially two thicknesses of cardboard.
4. Blank (14) according to any one of the preceding claims, characterised in that two opposing sections (16, 18) each include a substantially central opening (31) disposed close to the pre-cut transverse line (20) arranged in order to allow the detachment by pulling of one half-blank (21) with respect to the other (22) after gluing of one on the other.
5. Blank (14) according to any one of the preceding claims, characterised in that the pre-cut transverse line (20) includes a portion in the form of a trapezium allowing a display unit with inclined side walls to be obtained.
6. Packing box (1) formed from corrugated cardboard sheet material, comprising two elements which can be separated from one another manually, namely a first element (7) forming a display container and a second element (4) forming the upper part of the box, the first and second elements being obtainable from a single blank (14; 33) comprising a girdle (2) including at least four rectangular main sections (15, 16, 17, 18) connected together in pairs by parallel fold lines (24, 25, 26, 27), and provided with two series (29, 30) of flaps situated on either side, suitable for forming respectively at least in part the bottom and the top of the box, the girdle comprising a pre-cut transverse line (20; 36) allowing the blank to be divided into two half-blanks (21, 22; 34, 35) to form said two elements, characterised in that the two elements (4, 7) are inserted one into the other, in that the two elements are joined together by at least one spot of glue (32), in that said transverse line (20; 36) defines on either side and for each parallel fold line two separate portions of fold line (24' , 24'', 25', 25'', 26', 26'', 27', 27'') offset one in relation to the other in order to allow at least partial equalisation of the thicknesses of cardboard when the second half-blank (22) is wrapped over the first half-blank (21) around a mandrel to form said box, and in that said transverse line (20; 36) defines on either side the distal edges of the elements (4, 7).
7. Box according to claim 6, characterised in that the pre-cut transverse line (20) has a portion in the form of a trapezium allowing a display unit with inclined side walls to be obtained.
8. Box according to any one of claims 6 and 7, characterised in that two opposing sections (16, 18) each include a substantially central opening (31) disposed close to the pre-cut transverse line, arranged in order to allow the detachment by pressure of one element with respect to the other after gluing of one on the other.
9. Method for the production of a packing box (1) with a polygonal section from a one-piece blank (14) made of corrugated cardboard sheet, comprising a girdle (2) including at least four rectangular main sections (15, 16, 17, 18) connected to one another in pairs by parallel fold lines and provided with two series (29, 30) of flaps situated on either side, suitable for forming respectively at least in part the bottom (8) and the top (6) of the box, said girdle comprising a pre-cut transverse line (20; 36) allowing the blank (14) to be divided into two half-blanks (21, 22; 34, 35), where after removal of the blank (14) from the stack, the two half-blanks are separated, the first half-blank (21) is placed in a transfer channel, the second half-blank (22) being held in a plane above that of said transfer channel, the first half-blank (21) is transferred towards a mandrel and glue is applied as it passes, the first half-blank (21) is wrapped around the mandrel, the transfer channel being configured to allow the transfer of the second half-blank (22), said second half-blank (22) is lowered onto the channel, the second half-blank (22) is transferred towards the mandrel and wrapped around the first half-blank (21) itself wrapped around said mandrel, to form the side walls (3) of the box (1), before folding the flaps (29) around said mandrel to form the bottom (8) or the upper part of the box.
10. Method according to claim 9, characterised in that the separation of the half-blanks is carried out by shearing fingers (54).
11. Method according to any one of claims 9 and 10, characterised in that the transfer of the half-blanks is obtained through pushing fingers, the wrapping around the mandrel being achieved by applying a section of the girdle of the half-blank concerned to the lower face of the mandrel then wrapping and applying pressure to the lateral sections with retractable devices carried on the system for wrapping the sections.
12. Device (50) for forming a box (1) from a one-piece blank (14) made of corrugated cardboard sheet, comprising a girdle (2) including at least four rectangular main sections (15, 16, 17, 18) connected to one another in pairs by parallel fold lines (24, 25, 26, 27), and provided with two series (29, 30) of flaps situated on either side, suitable for forming respectively at least in part the bottom (8) and the top (6) of the box (1), said girdle (2) comprising a pre-cut transverse line (20) allowing the blank (14) to be divided into two half-blanks (21, 22), where the device (50) includes an assembly (51) for removing the blank from the stack, a system (54) for separating the half-blanks one from the other, a transfer channel (58) for transferring the first half-blank (21) towards a mandrel, the second half-blank (22) being held in a plane above that of said transfer channel (58), means (15) for applying glue to the first half-blank (21) during the transfer towards a mandrel, means for wrapping the first half-blank around said mandrel, means for configuring the transfer channel to allow the transfer of the second half-blank (22) towards said mandrel, lifting means (59) for lowering said second half-blank (22) onto the channel, means for wrapping it around the first half-blank (21) itself wrapped around said mandrel, to form the girdle of the box, and application means arranged to fold the flaps around said mandrel to form the bottom (8) or the upper part of the box.
13. Device according to claim 12, characterised in that the system for separating the half-blanks has shearing fingers (54).

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