WO1998043883A1

WO1998043883A1 - Box in sheet material with centring tab and blank or blank assembly for producing same

Info

Publication number: WO1998043883A1
Application number: PCT/FR1998/000640
Authority: WO
Inventors: Jean-Yves Bacques; Gérard Mathieu; Bernard Delause
Original assignee: Otor Societe Anonyme
Priority date: 1997-03-28
Filing date: 1998-03-27
Publication date: 1998-10-08
Also published as: FR2761341B1; FR2761341A1; AU7053298A

Abstract

The invention concerns a box (1) and a blank in corrugated board sheet or the like, with polygonal cross section, comprising side surfaces, a top surface (6) forming a lid and a bottom surface forming the box base. The two opposite side surfaces (2, 4) are each extended by at least a tab (17) connected to said surface by a folding line (19), overlapping the external face of the top surface whereto it is glued. The base (7) comprises at least two corresponding recessed parts (16), perpendicular to the tabs and arranged for being fitted into the tabs of a box arranged underneath.

Description

CASE OF SHEET MATERIAL WITH CENTERING TABS AND BLANK OR ASSEMBLY OF BLANKS FOR MAKING SUCH A CASE

The present invention relates to a box of corrugated sheet material or equivalent, of the type having a polygonal section, comprising lateral faces, an upper face forming a cover and a lower face forming the bottom of the box.

It also relates to a blank or a set of blanks for the production of such a box.

It finds a particularly important, although not exclusive, application in the field of stackable boxes on pallets, the lower boxes of which tend to be crushed in the event of a stack of too large a size.

The invention is also applicable to polygonal boxes with more than four sides which can present, when they are not completely filled, deformations in the event of lateral stress as well as a lower resistance to compression.

Are already known (DE 40 03104) body centering systems by lateral pins coming to cooperate with orifices placed on the edges of the packages. Such means are fragile and do not withstand repeated handling. Locking systems are also known which make it possible to block a box cover, which then avoids these untimely deformations. These include locking by adhesive strips. However, such systems have drawbacks. They in fact require an additional constituent element of the body, namely the ^" adhesive strip ^" and therefore entails additional costs and operations during manufacture.

The present invention aims to provide a box, a blank and / or a set of blanks which respond better than those previously known to the requirements of practice, in particular in that it offers centering of the boxes one on the other making it possible to perfect stacking of boxes on top of each other, directly above each other, which has not been achieved in the past, industrially and repeatedly.

It was thus possible to observe an improvement of 15% in compressive strength of the boxes located at the bottom of the pallet, with equal cardboard quality, thanks to the centering according to the invention.

Because of the perfect stacking possibilities that the centering according to the invention allows, the lower boxes are therefore better stressed in compression and resist better.

To this end, the invention notably proposes a case of material made of corrugated cardboard sheet or equivalent, having a polygonal section, comprising lateral faces, an upper face forming at least partly the cover and a lower face forming the bottom of the body, characterized in that at least two opposite lateral faces are each extended in the upper part, from their upper edge, by at least one tongue covering the outer surface of said upper face to which the tongue is glued, so that said tongues constitute protrusions protruding from the outer surface of the upper face, and in that the bottom comprises at least two parts corresponding to said tongues, hollowed out in the lower face, of shapes complementary to the shapes of the tongues, in line with said tongues, said hollowed out parts or recesses being arranged to allow an interlocking with the tongues of a box arranged below.

In advantageous embodiments, use is made of one and / or the other of the following arrangements:

- The box is formed from a blank comprising a series of at least four main flaps connected to each other by connecting lines, each main flap forming a lateral face and being provided with a lower flap located on one side of said main flap, said lower flaps being able to form the bottom of the box, and the cover of the box is constituted by an upper flap provided on its sides with first lateral flaps connected to said flap by first fold lines located opposite the upper edges of said lateral faces, and comprising slots located in line with said tabs, at the level of the first fold lines , passage of the tabs which are then folded over the outer surface of the upper flap where they are glued;

the lower flaps comprise two opposite external flaps and two opposite internal flaps situated above said external flaps, said lower flaps being connected respectively to the lateral faces by second fold lines, the external flaps being connected to the lateral faces provided with tabs and comprising said recesses at the level of the second fold lines of complementary shape and arranged vertically above the tongues;

the lower flaps comprise two opposite external flaps and two opposite internal flaps situated above said external flaps, said lower flaps being connected respectively to the lateral faces by second fold lines, the external flaps being connected to the lateral faces adjacent to the provided lateral faces tongues and comprising said recesses at their lateral edges, said recesses being of complementary shape and arranged perpendicular to said tongues; the lower face and the lateral faces are formed at least in part by an open tray, comprising a lower flap forming the lower face, and lateral walls forming at least partially the lateral faces, said lower flap comprising said recesses at the level of the lines of junction with the side walls called second fold lines, the recesses being of complementary shape and arranged vertically above said tabs;

- The upper face of the body is constituted by an upper flap provided with first flaps connected to said upper flap by first fold lines located opposite the upper edges of said side faces, and comprising slots located in line with said tabs, at level of the first fold lines, passage of the tabs which are then folded over the outer surface of the upper flap where they are glued; - The box is formed from a blank whose outer edges intended to form the upper edges of said box are provided with tongues and include adjacent recesses of complementary shape to said tongues; - The body has two opposite lateral faces, each provided on the one hand with two lateral flaps, situated on either side of the corresponding lateral face, said lateral flaps forming at least partially the two lateral faces. adjacent, and on the other hand an upper flap located on the side opposite to the lower flap, said upper flaps forming at least partly the upper face, at least one of said lateral flaps being provided with a tongue at its end situated on the side opposite the lower flap, said tab being folded down and glued to the upper face of the adjacent upper flap forming at least partially the upper face; - The box has four opposite tongues two by two, glued to the outer surface of the upper face forming the cover of the box, and four recesses plumb in the lower face of the box; - Each tongue has a rectangular or substantially rectangular or isosceles trapezoidal shape;

- The body is eight sides, namely four main sides separated by intermediate sides forming cut corners, and is formed around a mandrel.

The invention also proposes a blank or a set of blanks making it possible to obtain a box as described above. It also proposes, in particular, a blank or set of blanks of material made of corrugated cardboard sheet or equivalent intended to form a box with polygonal section, comprising lateral faces, an upper face forming the cover and a lower face forming the bottom of the box, said blank or set of blanks comprising a first blank or a first portion of blank intended to form the cover of the box, said first blank or said first blank portion comprising an upper flap provided with at least two first flaps, or comprising two so-called upper flaps, said upper flap or the two upper flaps being intended to form said upper face, a second blank or a second portion of blank capable of constituting the lateral faces and the underside of the box, comprising a lower flap or comprising at least two lower flaps, said lower flap or said two lower flaps being suitable for forming said lower face and being connected to main flaps or side flaps, said main flaps or said side flaps being suitable for forming at least ins partly the lateral faces of the body and being extended from their upper edge by at least two tabs, characterized in that the tabs are connected to said upper edges by fold lines and are arranged to cover the outer surface of said upper face to be glued to it during the formation of the body, and in that the lower flap or said two lower flaps comprise at least two recessed parts or at least four portions of recessed parts, corresponding to said folded tabs, to form recesses once the body is formed, the shapes of which are complementary to those of folded tabs and which are arranged so as to be perpendicular to said folded tabs and glued to the upper face of the box arranged below when the box is formed.

In an advantageous embodiment, the set of blanks comprises a first blank intended to form the cover of the box comprising an upper flap provided on its sides with first flaps connected to said flap by first fold lines, and a second blank comprising a series of at least four main flaps forming the lateral faces linked together in pairs by junction lines, each main flap being provided with a lower flap situated on one side of said main flap, said lower flaps being suitable for form the underside of the box, and in that said first fold lines include slots for passage of the own tongues to be then folded over said cover to be glued there during the formation of the box.

In an advantageous embodiment, said lower flaps comprise two opposite external flaps and two opposite internal flaps arranged alternately, said lower flaps being connected respectively to the main flaps by second fold lines, the external flaps are connected to the lateral faces provided with tongues and include the recesses of complementary shape with said tongues, at the level of the second fold lines and at right said tabs.

Advantageously, the lower flaps comprise two opposite external flaps and two opposite internal flaps arranged alternately, said lower flaps being connected respectively to the main flaps by second fold lines, the external flaps are connected to the main flaps adjacent to the flaps forming the lateral sides provided of tongues and comprise said recesses at their lateral edges, said recesses being of a shape complementary to that of said tongues.

Advantageously, the blank or set of blanks comprises a lower flap suitable for forming the lower face of the box, connected on each of its sides to lateral flaps or to end flaps suitable for forming at least partially the lateral faces of the body, the lower flap comprising said recesses at the junction lines, called second fold lines, with two of said opposite side faces.

Also advantageously in another embodiment, the blank or set of blanks comprises a first blank capable of forming the upper face of the box, consisting of an upper flap provided with first flaps connected to said flap by first fold lines provided with slots suitable for being located in line with said tabs when the box is formed.

In an advantageous embodiment, the outer edges of two lateral flaps intended to form two opposite lateral faces of the body are provided with tongues and comprise adjacent recesses of shape complementary to said tongues.

Advantageously, the blank comprises a rectangular or substantially rectangular central flap, called the lower flap, provided with two lateral flaps connected on either side to said lower flap by intermediate fold lines, and comprises on its two other opposite sides two flaps d ends, said side flaps comprising two third side flaps connected to said side flaps by third fold lines and a fourth flap located on the side opposite to the lower flap, at least one of said third side flaps being provided with a tongue its lateral end situated in the extension of said longitudinal flap on the side opposite to the lower flap, and in that the lower flap comprises said recesses at the junction lines between flap end and lower flap, in a shape complementary to those of the tabs.

According to the embodiments of the invention more particularly described here, the blank or set of blanks comprises four tongues opposite two by two, and four corresponding recesses.

The invention will be better understood on reading the following description of embodiments given by way of nonlimiting example. It refers to the accompanying drawings, in which:

- Figure 1 is a perspective view of a box according to a first embodiment of one invention. FIG. 2 is a plan view of the set of blanks making it possible to obtain the box of FIG. 1.

- Figures 3 and 4 are plan views of two other embodiments of a set of blanks according to the invention. - Figure 5 is a perspective view of another embodiment of a box 1 according to the invention.

- Figure 6 is a plan view of the blank for obtaining the box of Figure 5. - Figure 7 is a perspective view of another embodiment of a box 1 according to the invention with the cover open .

FIG. 8 is a plan view of the blanks used to obtain the box of FIG. 7. - Figure 9 is a plan view of another embodiment of a blank belonging to an assembly according to the invention.

In the following description, the same references designate identical body or blank elements.

FIG. 1 shows a box 1 of corrugated cardboard, for example double-sided, 3 mm thick, of parallelepiped shape, comprising four rectangular lateral faces 2, 3, 4 and 5, namely two large faces 2 and 4 in screws opposite and two small end faces 3 and 5 facing each other.

The box 1 also includes an upper face 6 forming the cover of the box and a lower face 7 forming the bottom of the box.

More precisely and with reference to FIG. 2, the lateral faces are formed from a blank 8 comprising a series of four main rectangular flaps 2, 3, 4 and 5, linked together in pairs by junction lines parallel 9, the series being terminated at its end by a rectangular bonding tab 10, arranged to be bonded to the face 2 opposite, during the formation of the box. Each main flap is provided on one side with a lower rectangular flap 11, 12, 13 and 14, suitable for forming the lower face 7 of the body and connected to the main flap by a second fold line 15, all the lines 15 being aligned. More precisely, the lower flaps comprise two internal flaps 12, 14, and two external flaps 11, 13, the external flaps each comprising two rectangular recesses 16, for example from 1 to 3 cm in width by 2 to 5 cm in length, respectively cut out. in said flaps on three sides, the fourth side being coincident or substantially coincident with the second fold line.

Each main flap comprises on the other side an upper free edge 15 ', forming the top of the side faces.

The two main flaps 11 and 13 further each comprise two rectangular tongues 17 of shape complementary to that of the recesses, arranged in line with the latter (lines 18 in dashed lines in the figures), said tongues being connected to the upper edge 15 'corresponding by a fold line 19, for example slightly offset from the thickness of the carton or, in another embodiment, aligned with the adjacent part of the upper edge.

The upper face 6 of the box, for its part, is formed by a blank 20 comprising a rectangular upper flap 21, of the same dimension as the bottom of the box, provided on its sides with first rectangular side flaps 22, connected to the upper flap by first fold lines 23, over their entire length, located opposite the upper edges 15 ′ of the side faces. Rectangular slots 24 of dimensions slightly greater than or substantially equal to those of the edges of the tongues, that is to say of the same width as, or of width slightly greater than that of the tongues, and of thickness equal or slightly greater than that of corrugated cardboard, are provided in line with said tabs.

When the cover is in place (see FIG. 1), the tongues 17 pass through slots, then are folded towards the inside of the box around the fold lines 19, said fold lines being for example slightly offset towards 1 'outside relative to the upper edge 15'.

The tongues 17 are glued, for example with so-called "hot melt" glue, to the outer surface of the upper flap 21 so that said tongues constitute protuberances protruding from said outer surface.

According to the invention, the recesses being of shape complementary to the shapes of the tongues and located at the right of the latter, this results in an interlocking of a box on the other with excellent lateral locking.

As can be seen in FIG. 2, two blanks 8, 8 ′ (in phantom) can advantageously be cut facing each other from the same strip of cardboard, which allows optimization of the consumption of cardboard . Figures 3 and 4 show two other embodiments of blank set for box with attached cover.

FIG. 3 shows a blank 30 whose external flaps 31 are attached to the main flaps 3 and 5 adjacent to the flaps 2 and 4 provided with the tongues 17.

The flaps 31 are rectangular in shape and comprise on their lateral edges, respectively, two rectangular recesses 32 and 33, opposite, of a shape complementary to that of the tongues and arranged to be arranged directly above said tongues when the box is formed.

The other two flaps 31 ′ are here the internal flaps, and for example comprise recesses 34 at their edges 35 opposite the second fold lines 15, so as to optimize the manufacture of the cutouts (see FIG. 3), the tongues being cut in the flaps of the adjacent blank 30 '(in phantom), which minimizes cardboard drops.

The blank 20 forming the cover is here identical to that of FIG. 2.

Figure 4 shows another blank mode 40 with two tabs 41, for example trapezoidal, located on the small main flaps 3 and 5 to which they are connected by fold lines

42. The offset (not shown) of the fold line 42 of the tongues on the side of the end of the tongue, here greater than the thickness of the cardboard, for example twice greater, results in a greater projection at this level which favors the with the recesses in the top box.

The tongues 41 are for example centered with respect to the corresponding lateral face. They can also be arranged symmetrically with respect to the center C of the upper face (see figure

4).

The bottom formed by the lower face 7 comprises meanwhile, plumb with the tongues 41, recesses of the same dimensions as the tongues with an adjustment tolerance of less than a millimeter, which allows perfect embedding between the tongue of a lower body and recess of an upper body. To obtain the recesses here, the upper corners of the outer flaps 43 are cut into half-recesses 44 of shape complementary to that of the centered half-tongues.

To optimize the blank cutouts one behind the other (see blank 40 '), there is also a recess 45 in the internal flap 43' corresponding to the face 3, 5 of the tongue 41.

Finally, the cover 46 of the type described above comprises two slots 47 suitable for being located at plumb with the tongues 41 when the cover is put in place.

Figures 5 and 6 show another embodiment of a box 50 and a blank 51 according to one invention.

The box is made up of a tray comprising a rectangular central flap said bottom flap 52 provided with two identical rectangular side flaps 53, connected on either side to flap 52 by intermediate, parallel fold lines 54, the flaps 53 forming two complete side faces of the body.

The lower flap 52 comprises, on its two other opposite sides, two rectangular or substantially rectangular end flaps 55 connected to the flap 52 by joining lines 56 perpendicular to the intermediate fold lines.

The flap 52 comprises four recesses 57, for example in the shape of a trapezium, arranged symmetrically with respect to a plane of symmetry 58 of the body, one side of which is substantially coincident with the junction line 56.

Each of the side flaps 53 comprises two third rectangular side flaps 59, connected to the side flaps by third fold lines located in the extension of the joining lines 56, and a fourth rectangular flap 60, located on the side opposite to the bottom flap 52 be linked said lateral flap by a fourth fold line 61 parallel to the intermediate fold lines 54.

Each of the third lateral flaps 59 comprises a tongue 62, of a shape complementary to that of the recesses, situated at its lateral end situated on the side opposite to the lower flap, in the longitudinal extension of the flap, and arranged to be perpendicular to 1 ′ corresponding recess 57 when the body is formed. The tongues 62 are folded around the fold lines 62 ′, for example offset by the thickness of the cardboard relative to the adjacent lateral edge of the flap

59 corresponding, or, in another embodiment, aligned with the corresponding edges. The tongues 62 are glued to the outer face 63 of the upper face formed by the fourth flaps 60.

Figures 7 and 8 show another embodiment of a box 70 and a blank 71 according to the invention.

The box consists of a tray 72 formed from the blank 71, and a cover 73 of the type described with reference to FIGS. 1 to 4.

Here the tongues 74 connected by a fold line 74 'to the corresponding flap 76 are arranged staggered, one with respect to the other, the slots in the cover being provided accordingly.

More specifically, the blank 71 comprises a series of three components, namely the central or lower component 75 and two side flaps 76 connected to the central flap by intermediate fold lines 77.

The recesses 78 are made in the central or lower flap at the level of the intermediate fold lines 77, one of the sides of the recesses being substantially coincident with said intermediate fold lines.

The tabs 74 are located on the free end edge 79 of each of the side flaps, located opposite the central flap, directly above the corresponding recesses.

End flaps and third flaps (without tongue) are also provided of the type described above with reference to Figure 6. In Figure 9, there is shown another embodiment of the blank of Figure 8, comprising recesses 80 formed in the side flaps next to the tabs so as to allow cutting edge to edge, thus avoiding cardboard losses. The recesses 80 are arranged symmetrically with respect to the tongues with an offset of at least one width of tongue, with respect to the external edge of the lateral face.

According to one embodiment of the invention, an offset is provided at the level of the fold line of the tongues, which can be obtained either by a double fold, or by an offset of the fold line itself, this offset always being superior or equal to the thickness of the cardboard, towards and inside the tongue.

Such a shift at the junction of the tongues and at the level of the recess plumb, promotes embedding and therefore further consolidates the stack of boxes during stacking.

Such adjustments are also possible because the boxes can be made with sufficient precision, in particular because they are formed around a mandrel.

In general, the tongues have a cooperation surface with the corresponding recess which is much greater than that of the thickness of the corrugated cardboard, unlike the case of conventional centering pins, for example at least three times greater, said tongues being folded and elongated. horizontally, perpendicular to the corresponding walls to which they are connected. As is obvious and as it follows from the above, the present invention is not limited to the embodiments more particularly described here. On the contrary, it embraces all the variants thereof and in particular those in which it additionally comprises an added sheet of cardboard, for reinforcing the bottom to avoid holes or orifices.

Claims

1. Box (1, 50, 70) of material of corrugated cardboard sheet or equivalent, having a polygonal section, comprising lateral faces (2, 3, 4, 5; 53, 59; 76), an upper face (6 , 63) at least partially forming the cover and a lower face (7; 52; 75) forming the bottom of the body, characterized in that at least two opposite side faces (2, 4; 59; 76) are each extended in the upper part, from their upper edge, by at least one tongue (17; 41; 62; 74) covering the outer surface of said upper face to which the tongue is glued, so that said tongues constitute protruding protuberances relative to the outer surface of the upper face, and in that the bottom (7; 52; 75) comprises at least two parts (16; 32; 33; 44; 57; 78) corresponding to said tongues, hollowed out in the face lower, of shapes complementary to the shapes of the tongues, to the right of said tongues uettes, the said recessed parts or recesses being arranged to allow an interlocking with the tongues of a box disposed below.

2. Box (1) according to claim 1, characterized in that it is formed from a blank (8) comprising a series of at least four main flaps (2, 3, 4, 5) connected together by connecting lines (9), each main flap forming a lateral face and being provided with a lower flap (11, 12, 13, 14; 31, 31 ') located on one side of said main flap, said lower flaps being able to form the bottom (7) of the box, and in that the cover (6) of the box is constituted by an upper flap (21, 46) provided on its sides with first side flaps (22) connected to said flap by first fold lines (23) located opposite the upper edges (15 ') of said side faces, and comprising slots (24, 47) located at right of said tabs, at the first fold lines (23), passage of the tabs which are then folded over the outer surface of the upper flap.

3. Box according to claim 2, characterized in that the lower flaps comprise two opposite external flaps (11, 13) and two opposite internal flaps (12, 14) located above said external flaps, said lower flaps being connected respectively to the faces lateral by second fold lines (15), and in that the external flaps (11, 13) are connected to the lateral faces (2, 4) provided with tongues and include said recesses (16) at the level of the second fold lines (15) of complementary shape and arranged directly above the tongues (17).

4. Box according to claim 2, characterized in that the lower flaps (31, 31 ') comprise two opposite external flaps (31) and two opposite internal flaps (31') situated above said external flaps, said lower flaps being connected respectively to the lateral faces by second fold lines (15), and in that the external flaps (31) are connected to the lateral faces

(3, 5) adjacent to the lateral faces (2, 4) provided with tabs and include said recesses (32, 33) at the side edges of said internal flaps, said recesses being of complementary shape and arranged directly above said tabs ( 17).

5. Box according to claim 1, characterized in that the lower face (52; 75) and the lateral faces (53, 59; 76) are formed at least in part by a tray, comprising a lower flap (52; 75) forming the lower face, and side walls forming at least partially the side faces and in that said lower flap comprises said recesses (57, 78) at the level of the junction lines with the side walls called second fold lines (56) , the recesses (57, 78) being of complementary shape and arranged perpendicular to said tabs (62, 74).

6. Box according to claim 5, characterized in that the upper face of the box is constituted by an upper flap (21, 73) provided with first flaps (22) connected to said upper flap by first fold lines (23) located opposite the upper edges (15 ') of said side faces, and comprises slots (24, 47) located in line with said tabs (74 ), at the level of the first fold lines, for the passage of the tabs which are then folded over the external surface of the upper flap where they are glued.

7. Box according to claim 6, characterized in that it is formed from a blank whose external edges intended to form the upper edges of said box are provided with tongues (74) and include recesses (80) adjacent to shape complementary to said tabs.

8. Box (50) according to claim 5, characterized in that it comprises two opposite lateral faces (53), each provided on the one hand with two lateral flaps (59) located on either side of the lateral face. corresponding, said side flaps (59) forming at least partially the two adjacent side faces, and on the other hand an upper flap (60) located on the side opposite to the lower flap (52), said upper flaps (60) forming at least partially the upper face of the body, at least one of said lateral flaps (59) being provided with a tongue (62) at its end situated on the side opposite to the lower flap, said tongue being folded down and glued to the upper face of the adjacent upper flap (60).

9. Box according to any one of the preceding claims, characterized in that it comprises four opposite tongues (17; 62; 74) two by two, bonded to the external surface of the upper face forming the cover of the box, and four recesses (16; 32; 33; 57; 78) plumb in the underside of the body.

10. Box according to any one of the preceding claims, characterized in that each tongue has a substantially rectangular or isosceles trapezoidal shape.

11. Box according to any one of the preceding claims, characterized in that it is eight sides, namely four main sides separated by intermediate sides forming cut corners, and in that it is formed around a mandrel.

12. Blank (51) or set of blanks (8, 20 30, 20; 40, 46; 71, 73) of corrugated sheet material or equivalent intended to form a box with polygonal section comprising lateral faces, one face upper forming a cover and a lower face forming the bottom of the box, said blank or set of blanks comprising a first blank (20, 46, 73) or a first portion of blank (60) intended to form the cover of the box, said first blank or said first blank portion comprising an upper flap (21) provided with at least two first flaps (22), or comprising two so-called upper flaps (60), said upper flap or the two upper flaps being intended to form said upper face, a second blank (8, 30, 40, 71) or a second portion of blank (52, 53, 55, 59) suitable for constituting the lateral faces and the underside of the body, comprising a lower flap (52, 75) or comprising at least two lower flaps (11, 12, 13, 14; 31, 31 '; 43, 43' ), said lower flap or said two lower flaps being suitable for forming said lower face and being connected to main flaps or lateral flaps suitable for forming at least partially the side faces of the body and being extended from their upper edge, by at least two tabs (17, 41, 62, 74), characterized in that the tabs are connected to said upper edges by fold lines (19, 42, 62 ', 74'), and are arranged to cover the surface exterior of said upper face to be there glued during the formation of the box, and in that the lower flap or said two lower flaps comprise at least two recessed parts (16; 32, 33; 57; 78) or at least four portions of recessed portions (44) corresponding to said folded tabs, called recesses, the shapes of which are complementary to those of the folded tabs and which are arranged so as to be perpendicular to said folded tabs and glued to the upper face of the body arranged below, when the body is formed.

13. Set of blanks (8, 20; 30, 20; 40, 46) according to claim 12, characterized in that it comprises a first blank (20, 46) intended to form the cover of the box comprising an upper flap (21) provided on its sides with first flaps (22) connected to said flap by first fold lines (23), and a second blank comprising a series of at least four main flaps (2, 3, 4, 5) forming the side faces connected together in pairs by junction lines (9), each main flap being provided with a lower flap ((11, 12, 13, 14; 31, 31 '; 43, 43') located d 'one side of said main flap, said lower flaps being able to form the underside of the box, and in that said first fold lines include slots (24, 47) for passage of the tabs capable of being then folded down on said cover to be glued to it during the formation of the box.

14. set of blanks (8, 20) according to claim 13, characterized in that said lower flaps comprise two opposite external flaps (11, 13) and two opposite internal flaps (12, 14) arranged alternately, said lower flaps being connected respectively to the main flaps by second fold lines (15), and in that the external flaps (11, 13) are connected to the lateral faces provided with tabs (2, 4) and comprise said recesses (16) of complementary shape, at the level of the second fold lines and in line with said tabs.

15. Set of blanks (30, 20) according to claim 13, characterized in that said lower flaps comprise two opposite external flaps (31) and two opposite internal flaps (31 ') arranged alternately, said lower flaps being connected respectively to the flaps main by second fold lines (15), and in that the external flaps (31) are connected to the main flaps (3, 5) adjacent to the flaps forming the lateral faces provided with tabs (17) and include said recesses (33 ) at their lateral edges, said recesses being of shape complementary to that of said tongues.

16. Blank or set of blanks (51; 71, 73) according to claim 12, characterized in that it comprises a lower flap (52, 75) capable of forming the lower face of the box, connected on each of its sides to side flaps (53, 76), or to end flaps (55), suitable for forming at least partially the side faces of the body, and in that the lower flap (52, 75) comprises recesses (57, 78) at the junction lines, say second fold lines (56) with two of said opposite lateral faces, of complementary shape and arranged in correspondence with said tongues.

17. Set of blanks (71, 73) according to claim 16, characterized in that it comprises a first blank (73) capable of forming the upper face of the box, consisting of an upper flap provided with first flaps connected to said flap by first fold lines provided with slots suitable for being located in line with said tabs when the box is formed.

18. Set of blanks according to claim 17, characterized in that the external edges of two lateral flaps intended to form two opposite lateral faces of the body are provided with tongues and comprise adjacent recesses (80) of shape complementary to said tongues.

19. A blank according to claim 16, characterized in that it comprises a rectangular or substantially rectangular central flap, said lower flap (52), provided with two lateral flaps (53) connected on either side to said lower flap by intermediate fold lines (54), and comprises on its two other opposite sides two end flaps (55), said side flaps comprising two side flaps (59) connected to said side flaps (53) by third fold lines and a fourth end flap (60) located on the side opposite to the lower flap, at least one of said third side flaps connected to said side flaps being provided with a tongue (62) at its lateral end situated in the longitudinal extension of said flap on the side opposite to the lower flap, and in that the lower flap (52) comprises said recesses (57) at the level of the junction lines between the end flaps and the lower flap, of shape complementary to that of the tongues.

20. Blank or set of blanks according to any one of claims 12 to 19, characterized in that it comprises four tongues opposite two by two, and four corresponding recesses.

21. Blank or set of blanks according to any one of claims 12 to 20, characterized in that each tongue has a rectangular or substantially rectangular or isosceles trapezoidal shape.

22. Blank or set of blanks according to any one of claims 12 to 21, characterized in that it comprises eight flaps, namely four main flaps separated by intermediate flaps forming cut corners, and in that it is arranged to be formed around a mandrel.