EP0944531A1

EP0944531A1 - Case made of sheet material with centring tabs and blank for producing same

Info

Publication number: EP0944531A1
Application number: EP97953003A
Authority: EP
Inventors: Jean-Yves Bacques; Gérard Mathieu
Original assignee: Otor SA
Current assignee: Otor SA
Priority date: 1996-12-27
Filing date: 1997-12-23
Publication date: 1999-09-29
Anticipated expiration: 2017-12-23
Also published as: CA2275941A1; DE69702930T2; NZ336911A; PL334291A1; JP2001507317A; JP3890084B2; AU5669698A; ATE195694T1; EP0944531B1; DE69702930D1; WO1998029316A1; FR2757833B1; US6257411B1; FR2757833A1

Abstract

The invention concerns a case and a blank made of sheet corrugated cardboard or the like, the case having a polygonal cross section, having side faces, an upper face forming a lid, and a lower face forming the bottom of the case. The lid has at least two tabs located on two opposite sides of the lid, cut from the upper face or from side faces adjacent the upper face. The bottom has at least two recesses on its lower surface corresponding to the tabs, complementary in shape to the tabs and arranged such that the recesses fit into the tabs of a case stacked beneath.

Description

CASE OF SHEET MATERIAL WITH CENTERING TABS AND BLANK 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 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.

Box centering systems are already known by lateral tenons which 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 indeed require an additional component of the body, namely the adhesive tape and therefore involves additional costs and operations during manufacture.

The present invention aims to provide a box and a blank meeting better than those previously known the requirements of practice in particular in that it provides centering of the boxes one on the other making possible perfect stacking of the boxes one on the other, perpendicular to each other, which has never been obtained in the past, in an industrial and repetitive manner.

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. With the invention, it is also possible to provide a lid locking system allowing a good squaring of the box during its closing, simple and easy to implement, without additional costs and allowing a definitive blocking, which further improves resistance to compression.

To this end, the invention proposes in particular a box of the type described above, characterized in that the cover comprises at least two tabs respectively located on two opposite sides of said cover, cut on one side into a thickness of the upper face or in the lateral face adjacent to said upper face, and articulated on the other side parallel and in a manner substantially coincident with the junction line between said face upper and the adjacent side face, said tabs respectively covering the outer surface of said upper face to which they are glued, so that they constitute protuberances projecting from said outer surface of said upper face, and in that the bottom comprises at least two recesses corresponding to said tongues, produced in said lower face, of shapes complementary to the shapes of the tongues and arranged to fit together 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 underside and the side faces are formed by an open tray, the cover of the box being constituted by a flap provided with at least one side flap, at least one tongue being cut from said side flap, said tabs being turned over to be glued to said flap forming the upper face;

- The underside and the side faces are formed from a blank comprising a series of at least four main flaps suitable for forming the side faces, connected together by junction lines, each main flap being provided with a lower flap, said lower flaps being suitable for forming the bottom of the box, the cover of the box being constituted by a central flap provided with at least one side flap, at least one tab being cut out from said side flap, said tabs being returned to be glued to said central flap forming the upper face; - The box is formed from a blank comprising a series of at least four main flaps suitable for forming the side faces, connected together by junction lines, each main flap being provided with an upper flap and a lower flap respectively located on either side of said main flap, said upper flaps being able to form the cover of the box, said lower flaps being able to form the bottom of the box, the tabs being cut in the lateral faces of the body and the recesses being made in the lower flaps;

- The box is formed from a blank comprising a series of at least four main flaps suitable for forming two lateral faces, the bottom and the cover of the box, interconnected by connecting lines, each main flap being provided with an upper flap and a lower flap respectively located on either side of said main flap, said upper or lower flaps being suitable for forming the two other side faces of the body and the tabs are cut in the lower flaps and upper of a first flap forming the cover, the recesses being made in a second flap forming the bottom of the box;

- The bottom and the lid each comprise two opposite external flaps and two opposite internal flaps located below said external flaps, said flaps being connected respectively to the lateral faces by fold lines and the two tabs are cut from one side in the flaps internal, and articulated respectively on the other side parallel to the fold lines of said internal flaps, said external flaps being glued to the internal flap portions adjacent to the tabs and said tabs respectively covering said external flaps to which they are glued;

- The external flaps include notches at the angles of junction with the fold lines and the internal flaps include parts projecting from end to end snapping into said notches;

- The external flaps include intermediate notches, located on the fold lines and the internal flaps include parts projecting from end to end snapping into said intermediate notches;

- The box has four opposing tongues two by two, bonded to the external surface of the upper face forming the cover of the box, and four opposite recesses in the lower face of the box;

- The tongues are cut by providing around said tongues a peripheral recess;

- each tongue has a rectangular or isosceles trapezoidal shape;

- The cover comprises two central slots, located respectively on either side of the cover, in parallel and at a determined distance from the junction lines between lateral face and upper face provided with glued tabs, the ends of said slots being connected by lines of rupture at the junction end corners with the said junction lines, suitable for allowing the opening of the box by tearing off the said cover by pulling out of the box from the two slots;

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

The invention also proposes a blank making it possible to obtain a box as described above.

It also and in particular proposes a blank or set of blanks of material of corrugated cardboard sheet or equivalent intended to form a box with polygonal section, comprising lateral faces, an upper face forming a cover and a lower face forming the bottom of the box, characterized in that it comprises a first blank, or a first blank portion, intended to form the cover of the box, said first blank, or said first blank portion, comprising a flap provided with at least two lateral flaps, or comprising two so-called upper flaps, said flap or the two upper flaps being intended to form said upper face, in that at least two of said lateral flaps or said upper flaps each comprise at least one tongue cut out from one side in said flap, and connected on the other side to the upper face or to the adjacent flap by a fold line slightly offset from the fold line of the said flap with said adjacent flap, said tabs being arranged to respectively cover the upper face to be glued to it, and in that it comprises a second blank or a second portion of blank suitable for constituting the bottom of the box, comprising a lower flap or comprising at least two lower flaps, said lower flap or said two lower flaps being able to form the lower face of the box and being provided with notches or notches portions whose overall shape is complementary to that of a tongue once the body is formed.

In an advantageous embodiment, the blank or set of blanks comprises a first blank or a first blank portion intended to form the cover of the box comprising a flap provided with lateral flaps, at least one tongue being cut from at least one of said side flaps and arranged to be turned over and glued to said flap forming the upper face, and a second blank or a second portion of blank intended to form the bottom of the box, comprising a central rectangular flap provided on each of its sides with a first flap completed for some of the second lateral flaps and suitable for forming the side walls of the box, said central flap comprising at least two recesses located opposite along the lines of junction with the first flaps, said recesses being of shape complementary to that of the tongues and arranged to be perpendicular to said tongues when the body is formed.

In an advantageous embodiment, the blank comprises a series of at least four main flaps connected to each other by junction lines, each main flap being provided on either side with an upper flap and a lower flap respectively located on either side of said main component, a first main component being suitable for forming the cover of the box, and a second main flap, not adjacent to the first main flap, being suitable for forming the bottom of the box, and in that the tongues are cut in the lower and upper flaps of the said flap. first main component, the recesses being made in the second main component.

Advantageously, the blank has side flaps connected to each other by means of first parallel fold lines, a first set of flaps connected to one side of said side flaps by second fold lines orthogonal to said first fold lines, suitable for forming the bottom of the box, and a second set of flaps connected to the other side of said side flaps by third fold lines orthogonal to said first fold lines, suitable for forming the cover of the box, said first and second sets being formed of two so-called external side flaps interposed with two so-called internal side flaps, characterized in that said internal flaps of the cover each have a tongue cut out on one side in said flap, and connected on the other side to the adjacent flap by a line of fold substantially coincident with the third fold line of said flap, said outer flaps nes being arranged to be glued to the portions of internal flaps adjacent to the tabs and said tabs to respectively cover said external flaps to which they are adapted to be glued, and in that the lateral sides of the external flaps of the bottom have notches of complementary shape to that of a half tab. Advantageously, the peripheral edges of the external flaps opposite the third fold lines respectively comprise two half-slots situated on either side of said external flaps, at a determined distance from the lateral edges of said corresponding flaps.

Also advantageously in another embodiment, the blank or the set of blanks has two slots made in the flap intended to form the cover of the box.

In another advantageous embodiment, each end of the slit or half-slit is extended by a breakable or breaking line in the said cover over a determined distance, the said breakable line being directed at an angle towards the corner of the line. of junction with the adjacent side face and contiguous to a tongue and being arranged to be located towards the center of the cover and beyond the corresponding edge of said tongue and the bonding points of the cover, when said box is formed.

Advantageously, each tongue has a rectangular or isosceles trapezoidal shape.

According to the invention more particularly described here, the tongues are further cut by providing around said tongues a peripheral recess.

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. - Figure 1A is a schematic and partial sectional view showing the principle of centering between two boxes of Figure 1.

- Figure 2 is a plan view of the blank of Figure 1.

- Figure 3 is a perspective view of the lower part of a box-shaped box, according to a second embodiment of the invention.

- Figures 4A and 4B show the blanks respectively for obtaining said lower part of Figure 3 and the cover of the corresponding box.

- Figure 5 is a plan view of another embodiment of a blank according to the invention with four components.

FIG. 6 is a perspective view of the box, cover open, according to the blank in FIG. 5.

- Figures 7, 8 and 9 are top views of the box of Figure 5 showing the successive formation of the cover.

- Figure 10 is a perspective view of the box of Figures 6 to 9 once formed.

- Figure 11 is a perspective view of a fourth embodiment of a box according to the invention, cover open.

- Figure 12 is a perspective view of the box of Figure 11 with the cover closed.

- Figure 13 is a plan view of another embodiment according to the invention of an eight-sided blank.

- Figure 14 shows in perspective another embodiment of boxes according to the invention, with four centering tabs, showing the possibilities of interlocking between cover and bottom. FIG. 15 is the plan blank of the box of FIG. 14.

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

According to this embodiment of the invention, the cover comprises two rectangular tabs 8 and 9, of width greater than 3 cm, for example 4 cm, and of length greater than 2 cm, for example 4 cm in length, d 'thickness equal to that of the cardboard, and respectively cut from the side faces 3 and 5 adjacent to the upper face 6, on three sides of said tabs, which are folded down and glued to the outer face 10 of the upper face, for example with the glue says "Hot Melt" in Anglo-Saxon language.

To do this, the tongue is articulated on its fourth side parallel and substantially coincident with the junction line 11, between upper face and lateral face, around a double fold line 12 of which at least one line is offset towards the tongue. relative to the junction line 11.

The offset of the double line allows the end of the tongue to be detached from the side of its junction line 12, resulting in a greater protrusion at this level which promotes embedding with the recesses in the top box (see Figure 1A).

The tongues 8 and 9 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 6.

The bottom formed by the underside 7 comprises meanwhile, plumb with the tongues 8 and 9, rectangular recesses 13 and 14 of the same dimension as the tongues with an adjustment tolerance of less than a millimeter, which allows a perfect fitting between the tongue of a lower case and the recess of an upper case. FIG. 2 shows the blank 15 which made it possible to produce the box 1 of FIG. 1.

The blank 15 comprises a series of four main flaps 7, 4, 6 and 2 ending in a tongue 16 for gluing extending over the entire length of the flaps.

The flaps are connected together by folding or joining lines 17.

The series of shutters is bordered on one side by a first set 18, of upper flaps, and on the other side by a second set 19, of lower flaps.

More precisely, each main flap has an upper flap and a lower flap.

The flaps 2 and, suitable for forming lateral faces of the box each comprise an upper flap 18 'and a lower flap 19', rectangular, identical to each other.

The flaps 18 'and 19' are arranged to form the internal part of the side walls 3 and 5 of the body 1, for example by being joined at their ends when the body is made.

The flap 6 intended to form the cover of the box is connected in turn by the fold lines 11, to two rectangular flaps 18 "and 19" which include the rectangular tabs 8 and 9.

Each tongue is cut on three sides 20 in the corresponding flap and is connected to the flap 6 on the fourth side 21 by the double fold line 12.

A recess 22 or 23, of sufficient width to allow good clearance of the tongue relative to the flap, for example of width between 1 mm and 5 mm, for example 3 mm, is provided around the tongues 8 and 9 respectively.

This recess allows the tongues 8 and 9 to be held horizontally, in the extension of the flap 6 when the flaps 18 "and 19" are folded around a mandrel, during the formation of the box. It then suffices to push from below and to fold the tongue towards the flap 6 around the double fold line 12 to come and stick the said tongue in the projecting position to constitute the centering means according to the invention. Finally, the flap 7 is connected in turn via fold lines 24 perpendicular to the lines 17, to two rectangular flaps 18 '"and 19" "with dimensions equal to those of the flaps 18" and 19 ", but devoid of tabs, the transverse dimension of the flaps 18 ", 18 '", 19 "and 19'" being such that said flaps are joined two by two along line 25 when the body 1 is formed (cf. FIG. 1).

The flap 7 comprises the two rectangular recesses 13 and 14, for example made in only part of the thickness of the carton if it is a double double, the end 26 of which located on the side of the flap overlaps the fold line 24, which makes it possible, once the body is formed, to provide a greater recess thickness 27 plumb of the line 12, allowing better embedding with the larger projection 28 due to the offset of the double line 12.

FIG. 1A thus schematically shows in section the embedding of the projection 28 'of the body 1' in the recess 27 of the body 1.

Such adjustments are possible with the desired precision, in particular because the boxes are formed around mandrels as described in document FR 8803719. FIGS. 3, 4A and 4B show an open tray 30, parallelepipedal, formed by a blank 31 of the type known in itself (cf. FIG. 4A), comprising a central flap 32, provided on each side with flaps, namely two identical rectangular first flaps 33 vis-à-vis connected to the central flap 32 by fold lines 34 and two second rectangular flaps 35 connected to the flap 32 by fold lines 36 perpendicular to the fold lines 34, and themselves comprising two identical third flaps 37, respectively connected to each lateral side, intended to form by gluing with the rectangular flaps 33 two of the side walls facing the tray, the other two walls being formed by the flaps 35. In the embodiment described here, it is foreseen u four centering means.

To do this, the central flap 32 has four recessed parts 38, for example identical, centered with respect to the side walls of the box, rectangular and one side 39 of which is substantially confused with a central part of the fold lines 34 and 36.

FIG. 4B shows the blank 40 to constitute the cover of the box obtained with the tray 30 of FIG. 3.

The blank 40 has a rectangular central flap 41 connected by two-to-two perpendicular fold lines 42, to rectangular flaps 43. Each flap 43 has a tongue 44 according to the invention, for example rectangular, cut on three sides in the flap by providing a peripheral recess 45, and connected on the side of the central flap

41 to said central flap by a double fold line 46, or by a single fold line offset inside the tongue.

The tongues 44 have a shape complementary to that of the recesses 38 and are therefore arranged to be turned over and glued, for example with "Hot Melt" glue in Anglo-Saxon language, on the external face of the flap 41.

The remaining parts of the flaps 43 are glued to the external faces of the flaps 33 and

35 of the tray 30. FIG. 5 shows a blank 50 comprising a series of four lateral flaps, namely two large rectangular flaps 51 and 52 interspersed with two small rectangular flaps 53 and 54.

The series of flaps is terminated on one side, by a tongue 55 suitable for being fixed on the periphery of the end flap 51. The flaps are connected together by first fold lines 56 parallel. The blank comprises a first set 57 of flaps located on one side of the flaps and intended to form the bottom of the box, and a second set 58 of flaps located on the other side of the flaps and intended to form the cover of the box.

More precisely, the first set 57 comprises four substantially rectangular flaps connected to the lateral sides of the four flaps by aligned fold lines 59, perpendicular to the first fold lines, namely two large identical flaps 60, called external flaps connected to the large flaps 51 and 52 and two identical small internal flaps 61, connected to small flaps 53 and 54.

In the embodiment more particularly described here, the two large flaps 60 have a width, in the transverse direction, equal to or substantially equal to half the width of the closed box.

Each large external flap 60 has two lateral sides terminated on the side of the angle with the peripheral edge parallel with the fold line 59, by a notch 62 of rectangular shape complementary to that of a half-tongue which will be described below - after.

The small internal flaps 61 are identical and rectangular.

The second set 58 of flaps is connected to the four main flaps by third fold lines 63 perpendicular to the first fold lines 56.

It comprises two large identical flaps 64 which are substantially rectangular external. Each outer flap 64 has two lateral sides each provided with a notch 65, for example in the form of a portion of a circle, at the junction angle with the fold lines 63, so that said fold line ends in a free portion. any flap over a distance d, portion which can advantageously be find a little below said line, to allow better embedding.

The edges of the flaps 64 opposite the third fold lines also comprise two half-slots 66 located on either side of the flaps, at a determined distance from the lateral edges of said flaps.

Each end of the half-slots is extended by a breakable line 67 over a determined distance, directed at an angle towards the corner corner of the flap with the third fold line, to end at the end of the cutout 65, junction with this fold line.

The width of the flaps 64, between the third fold lines 63 and the peripheral edges is equal to half the width of the cover of the box so that, when formed, said edges are joined, the half-slots 66 coming opposite to form two identical, parallel slots, straddling the junction between flaps.

The small flaps 68 are rectangular, for example of the same width as the large flaps 64.

They each have a rectangular tab 69 cut on one side in the flap, sparing over most of its periphery, that is to say all around except for a small portion on either side at the level of the fold line, a peripheral recess 70, and connected on the other side to the flap 53 or 54 by a fold line 71 slightly offset towards the inside of the flap, of a thickness of cardboard for example, relative to the third fold line 63, which is distributed on either side of said tongue, centered relative to the flap. The small flaps 68 comprise on each lateral face, at the junction with the fold line 63, a rectangular projecting part 72 arranged to cooperate with the recessed part 65, so as to come to rest on the upper edge of the wall 51 or 52 which thus constitutes a support for the detachable flap part of the tongue 69.

Finally, there are provided breakable lines 72 ′, at an angle, cutting the upper corners of the small flaps, to allow better removal of the cover.

Figures 6 to 10 show the formation of a box 73, formed with a blank of the type corresponding to Figure 5. In the following, we will use the same reference numbers as for the blank of Figure 5, to designate the same elements.

The bottom 74 is formed in a manner known in itself, with the recesses 75 according to the invention, obtained from the notches 62.

The bottom of the box being formed and the box erected around a mandrel, we begin by folding down the small internal flaps 68, the tabs 69 then naturally keeping vertically vertically in line with the lateral sides 53 and 54 (cf. FIGS. 6 and 7) by releasing the corresponding recesses 70 '.

The lateral parts 76 of the flaps 68 have been previously glued, with "Hot Melt" glue for example, by points or lines of glue 77, on a sufficient portion to allow good fixing of the flaps between them, but inside of the internal flap relative to the breakable lines 67 of the external flaps 64.

The internal flaps also do not sink, the projecting parts 72 coming to bear on the upper edge of the walls 54, thereby preventing plunging thanks to the back pressure thus exerted.

The external flaps 64 are then folded down (cf. FIG. 8) forming the slots 78, and applied to the internal flaps 68. The breakable lines 67 are entirely outside the points and / or gluing lines 77, which will allow easy removal of the cover when the user pulls from the slots 78. Gluing lines 79 have moreover been previously provided on the upper external face of the external flaps 64 in line with the tabs 69.

Finally (cf. FIG. 9), the tongues 69 are folded down and glued to the upper face of the external flaps 64 to produce the centering means by tongue according to the invention.

FIG. 10 shows a perspective view of the body 73 thus obtained, with its anti-dive corners 80 formed by the projections 72 in the notches 65, and its protruding centering tabs 69, in particular with an offset at 81 for better allow embedding, as specified with reference to Figures 1 and 1A.

To open the extremely solid and rigid case, it suffices to pull according to the arrows 82, as described above.

Figures 11 and 12 show a variant of the body described with reference to Figures 5 to 10.

More specifically, FIGS. 11 and 12 show a box 83 provided with tongues 84 cut out from internal flaps 85.

Each internal flap 85 has on its lateral edges 86, two projecting parts, rectangular, from 2 to 5 mm in width, namely a first projecting part 87 at the junction corner with the line of folding 88, as described with reference to FIG. 5, and a second protruding part 89, at the end, situated at the end corner of the flap opposite the folding lines 88. Each protruding part 87 and 89 is arranged to rest and snap into a corresponding recess 90 and 91 formed at the fold line 92 of the outer flap 93 with the lateral side of the box 94. When the flaps have been successively folded over each other and glued as described below - before, a box is thus obtained according to FIG. 12 with eight anti-dive projections 95.

Here again the sandwiching of the external flaps between internal flaps and tabs allows excellent squaring and blocking of the body, which behaves like an extremely solid rigid block.

FIG. 13 shows another embodiment of blank 96 according to the invention for an eight-sided box with cut corners.

The blank 96 comprises four main flaps 97 and four intermediate flaps 98 suitable for forming the cut corners of the body, said intermediate flaps being devoid of flaps, the series being terminated by a fixing tab suitable for being fixed on the intermediate flap 98 attached at the main end flap 97.

The flaps are connected together by first parallel fold lines 99. Here again, the blank comprises a first set of flaps intended to form the bottom and a second set of flaps including those with tab 100 as described with reference to the blank in FIG. 5.

Each flap of the second set has two lateral sides having a first biased part at 45 ° towards the outside of the flap from second fold lines 101 which are aligned, said oblique part being arranged to cover the adjacent intermediate flap when the box is formed. The large external flaps of the first set also include this oblique portion and end notches 102 to form the bottom recesses according to the invention as described with reference to FIG. 5. FIG. 14 shows two boxes 103, 103 ′ according to another embodiment of the invention, comprising four tongues 104 and four corresponding recesses 105 '.

Here, two tabs 104 are provided at each end of the large flaps 106 which are here internal, the small flaps 107 being sandwiched between the remaining, perforated part of the large flap and the two tabs facing the two large flaps , whose edges 108 are also adjacent to ensure closure of the cover.

FIG. 15 shows the blank 109 making it possible to obtain the box 103 of FIG. 14.

The tongues are designed identically to what has been described above. They are cut from the so-called internal flaps 106 with peripheral recess 110, the external flaps 107 being simply rectangular.

The recesses are made in the rectangular flaps 111 of dimension identical to that of the flaps 106, intended to form the bottom.

The recesses have dimensions complementary to the tabs as described above.

One of the important elements in several embodiments of the invention resides in the offset at the level of the fold line of the tabs, which can can be obtained either by a double fold, or by an offset of the fold line quite simply, this offset being always greater than or equal to the thickness of the cardboard, towards and inside the tongue.

The offset at the junction of the tabs and at the level of the recess plumb, considerably promotes the 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.

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 variants, and in particular those where it also has an added sheet of cardboard, reinforcing the bottom to avoid holes or orifices and those where the junction edges between the bottom flaps are biased and not perpendicular by relative to the side faces facing and centered.

Claims

1. Box (1; 73; 83; 103,103 ') of corrugated sheet material or equivalent, having a polygonal section, having lateral faces (2, 3, 4, 5; 33, 35; 51, 52, 53 , 54; 97, 98), an upper face (6) forming a cover and a lower face (7) forming the bottom of the box, characterized in that the cover comprises at least two tabs (8, 9; 44; 69; 84; 104) respectively located on two opposite sides of said cover, cut on one side into a thickness of the upper face or in the side face adjacent to said upper face, and articulated on the other side parallel and substantially coincident with the junction line (11; 42; 63; 88) between said upper face and the adjacent side face, said tabs respectively covering the outer surface of said upper face to which they are glued, so that they constitute protruding protuberances compared to said outer surface of said upper face, and in that the bottom comprises at least two recesses (13, 14; 38; 62; 102; 105) corresponding to said tongues, produced in said lower face, of shapes complementary to the shapes of the tongues and arranged to fit together with the tongues of a box arranged below.

2. Box according to claim 1, characterized in that the lower face (7) and the lateral faces are formed at least in part by an open tray (30), the cover of the box being constituted by a flap (41) provided at least one lateral flap (43), at least one tab (44) being cut out in said lateral flap, said tabs being turned over to be glued to said flap (4) forming the upper face.

3. Box according to claim 1, characterized in that the lower face and the lateral faces are formed from a blank comprising a series of at least four main flaps suitable for forming the lateral faces, interconnected by lines junction, each main flap being provided with a lower flap, said lower flaps being suitable for forming the bottom of the box, the cover of the box being constituted by a central flap provided with at least one lateral flap, at least one tongue being cut from said lateral flap, said tongues being turned over to be glued to said central flap forming the upper face.

4. Box according to claim 1, characterized in that it is formed from a blank comprising a series of at least four main flaps suitable for forming the side faces, interconnected by connecting lines, each main flap being provided with an upper flap and a lower flap respectively located on either side of said main flap, said upper flaps being able to form the cover of the box, said lower flaps being able to form the bottom of the box , the tabs are cut in the lateral faces of the box and the recesses are made in the lower flaps.

5. Box according to claim 1, characterized in that it is formed from a blank (15) comprising a series of at least four components main (2, 3, 4, 5) interconnected by connecting lines (17), each main flap being provided with an upper flap (18 ', 18 ", 18"') and a lower flap ( 19 ', 19 ", 19'") respectively located on either side of said main flap, said upper and lower flaps being able to form two side walls of the body, and in that the tongues (8, 9) are cut in the lower (19 ") and upper (18") flaps of a first flap (6) forming the cover, the recesses being made in a second flap (7), not adjacent to said first flap, forming the bottom of the checkout.

6. Box according to claim 1, characterized in that the bottom and the cover each comprise two opposite external flaps (60, 64) and two opposite internal flaps (61, 68) located below said external flaps, said flaps being connected respectively on the lateral faces by fold lines (59, 63), in that the two tabs (69; 100) are cut on one side in the internal flaps, and articulated respectively on the other side parallel to the fold lines of said internal flaps, said external flaps being glued to the portions of internal flaps adjacent to the tabs and said tabs respectively covering said external flaps to which they are glued.

7. Box according to claim 6, characterized in that the external flaps include notches (65) at the junction angles with the fold lines and in that the internal flaps comprise protruding parts (72) which snap into said notches.

8. Box according to any one of claims 6 and 7, characterized in that the external flaps include intermediate notches (91), located on the fold lines (92) and in that the internal flaps include protruding parts (89) opposite end snapping into said intermediate notches.

9. Box according to any one of the preceding claims, characterized in that it comprises four tongues (104) opposite two by two, glued to the external surface of the upper face forming the cover of the box, and four recesses (105) in opposite in the underside of the body.

10. Box according to any one of the preceding claims, characterized in that the tongues are cut by providing around said tongues a peripheral recess (22, 45, 70, 110).

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

12. Box according to any one of the preceding claims, characterized in that the cover comprises two slots (66, 78) respectively on either side of the cover, parallel and at a determined distance from the junction lines (63, 81 ) between lateral face and upper face provided with glued tabs (69), the ends of said slots being connected by breaking lines (67) at the corners of the junction end with said junction lines, suitable for allowing the opening of the body by uprooting of said cover by pulling out of the box from the two slots.

13. Box according to any one of the preceding claims, characterized in that it is eight sides, namely four main sides (97) separated by intermediate sides (98) forming cut corners, and in that it is formed around a mandrel.

14. Blank (15; 50; 96) or set of blanks (31, 40) of corrugated sheet material or equivalent intended to form a box with polygonal cross section comprising lateral faces (2, 3, 4, 5; 33 , 35; 51, 52, 53, 54; 97, 98), an upper face (6) forming a cover and a lower face (7) forming the bottom of the box, characterized in that it comprises a first blank or a first blank portion intended to form the cover of the box, said first blank or said first blank portion comprising a flap (6; 41) provided with at least one lateral flap (18 ", 19"; 43), or comprising two so-called upper flaps (68, 106), said flap or the two upper flaps being intended to form said upper face, in that said lateral flap or said upper flaps each comprise at least one tongue (8, 9; 44, 69; 84 ; 104) cut from one side in said flap, and connected on the other side to the upper face or to the adjacent flap by a fold line (12; 46) slightly offset from the fold line (11; 42) of said flap with said adjacent flap, said tabs being arranged to respectively cover the upper face (6) to be glued thereto, and in that it comprises a second blank (31) or a second portion of blank suitable for constituting the bottom of the box, comprising a lower flap (7, 32) or comprising at least two lower flaps (60; 111), said lower flap or said two lower flaps being able to form the lower face of the body, being provided with notches (13, 14; 38; 105) or portions of notches (62, 102) whose overall shape is complementary to that of a tongue once the box has been formed.

15. Blank or set of blanks according to claim 14, characterized in that it comprises a first blank or a first portion of blank intended to form the cover of the box comprising a flap (6, 41) provided with lateral flaps, at least a tongue (8, 9, 44) being cut from at least one of said side flaps and arranged to be turned over and glued to said flap forming the upper face, and a second blank (31) or a second portion of blank intended to form the bottom of the box, comprising a central rectangular flap (7, 32) provided on each of its sides with a first flap completed for some with second side flaps and suitable for forming the side walls of the box, said central flap comprising at least two recesses (13, 14; 38) located opposite each other along the junction lines (24, 34) with the first flaps, said recesses being of shape complementary to that of the tongues and arranged to be plumb of said tabs when the body is formed.

16. A blank according to claim 14, characterized in that it comprises a series of at least four main flaps (2, 4, 6, 7) interconnected by connecting lines (17), each main flap being respectively provided on either side with an upper flap and a lower flap, a first main flap (6) being able to form the cover of the box, and a second main flap (7), not adjacent to the first main flap, being suitable for forming the bottom of the box, and in that the tabs (8, 9) are cut in the lower (19 ") and upper (18") flaps of said first main flap, the recesses (13, 14) being produced in the second main flap (7).

17. Blank according to claim 14, characterized in that it comprises a series of side flaps (51, 52, 53, 54; 97, 98) interconnected by one through first parallel fold lines (56, 99) , a first set of flaps connected to one side of said lateral flaps by second fold lines (59) orthogonal to said first fold lines, suitable for forming the bottom of the box, and a second set of flaps connected to the other side said side flaps by third fold lines (63) orthogonal to said first fold lines, suitable for forming the cover of the box, said first and second sets consisting of two said side flaps (60, 64) interposed with two side flaps said internal (61, 68), characterized in that said internal flaps of the cover each have a tongue (69, 100) cut on one side in said internal flap, and connected on the other side to the adj shutter acent by a fold line substantially coincident with the third fold line of said flap, said external flaps being arranged to be glued to the portions of internal flaps adjacent to the tabs and said tabs to cover respectively said outer flaps to which they are bonded, and in that the lateral sides of the outer flaps of the bottom have notches (62, 102) of shape complementary to that of a half-tab.

18. A blank according to claim 17, characterized in that the peripheral edges of the external flaps opposite the third fold lines respectively comprise two half-slots (66) located on either side of said external flaps, at a determined distance from the edges lateral of said corresponding flaps.

19. Blank or set of blanks according to any one of claims 15 and 16, characterized in that it comprises two slots (78) facing each other made in the flap intended to form the cover of the box.

20. Blank or set of blanks according to any one of claims 18 and 19, characterized in that each end of slot or half-slot is extended by a breakable line (67) in said cover over a determined distance, said line breakable being directed obliquely towards the corner corner of the junction line with the adjacent side face and contiguous with a tongue (69) and being arranged to be located towards the center of the cover and beyond the corresponding edge of said tongue and bonding points of the cover, when said box is formed.

21. Blank according to any one of claims 14 to 20, characterized in that each tongue has a rectangular or isosceles trapezoidal shape.

22. A blank according to any one of claims 14 to 21, characterized in that the tongues are cut by providing around said tabs a peripheral recess (22, 45, 70, 110).