Cardboard bottle wedging device
The cardboard wedging device with a second wall and partition design addresses the issue of protecting both bottles and cases by absorbing and resisting impact energy, ensuring the case remains undamaged.
Patent Information
- Application Number
- FR2023010865
- Authority / Receiving Office
- FR · FR
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2023-10-11
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2043-10-11
AI Technical Summary
Existing cardboard wedging devices for bottles with protruding shapes fail to adequately protect both the bottle and its case from damage during falls, as they either deform or get pierced, potentially marking the case.
A cardboard wedging device with a specific design featuring a second wall and a partition that deforms to absorb kinetic energy, combined with a partition that resists the bottle's movement, ensuring two-level energy absorption to prevent impact on the case.
The device effectively protects both the bottle and its case by distributing and resisting the impact energy, preventing the bottle from marking the case upon falling.
Smart Images
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Abstract
Description
Title of the invention: Cardboard wedging device for bottle
[0001] The present invention relates to a cardboard wedging device adapted to wedging a bottle inside a case.
[0002] One area of application envisaged is in particular, but not exclusively, that of perfumery, in which the bottles have original shapes but are sometimes fragile.
[0003] Also, the bottles are held in cases by means of cardboard wedging devices, which allow shock absorption in the event of a fall. And the challenge is not only to preserve the bottle, but also to be able to guarantee the integrity of the case when it falls with its container, onto a rigid floor wall. In other words, the wedging device must prevent the bottle from leaving a visible mark on the case after such a fall.
[0004] It is known to use corrugated cardboard sheets to make devices for wedging bottles.
[0005] For example, single-fluted corrugated cardboards, having fluted paper sandwiched between two smooth sheets of paper, are usually cut and shaped to form a wedging device capable of receiving a bottle. The wedging device loaded with the bottle is then slidably engaged inside a cylindrical case with a rectangular base, for example. The case itself is, for example, made of cardboard and generally of solid cardboard.
[0006] Thus, when the case falls, upon contact with the floor wall, the bottle tends to deform the corrugated cardboard of the wedging device and crush it at the point of impact. Thus, by deforming, the corrugated cardboard absorbs the kinetic energy generated by the fall of the bottle and its wall does not reach the case.
[0007] When, with respect to the point of impact, the portion of the surface of the bottle in contact with the wedging device is large, the deformation of the corrugated cardboard is less since the energy of the impact is distributed over a larger surface area.
[0008] On the other hand, when the bottle has protruding external shapes, the corrugated cardboard risks being pierced after the fall, and the case damaged.
[0009] Thus, a problem which arises and which the present invention aims to solve is to provide a cardboard wedging device which makes it possible to preserve not only the bottle, but also the case in the event of a fall.
[0010] In order to solve this problem, there is proposed, according to a first object, a cardboard wedging device adapted to wedge, inside a case, a bottle having a bottom opposite a pointed end. The wedging device comprises: a bottom wall and a rear wall erected relative to said wall bottom, said bottle being able to be placed against said rear wall, while said bottom of said bottle rests on said bottom wall; a first wall extending at right angles to said rear wall and in line with said bottom wall; a second wall having a light and extending said first wall by extending back to said rear wall, defining a transverse cylindrical receiving volume.The wedging device further comprises a partition secured to said rear wall and extending inside said receiving volume between said first wall and said second wall opposite said lumen, said pointed end of said bottle being adapted to extend into said receiving volume as far as said partition by passing through said lumen whereby, when said pointed end and said second wall are driven towards each other, said second wall and said partition are able to deform to resist the relative movement of said pointed end and said second wall.
[0011] Thus, a characteristic of the invention lies, on the one hand, in the implementation of the second wall through which the pointed end of the bottle passes, and on the other hand in the implementation of the partition which extends between the first wall and the second wall opposite the light. In other words, the partition extends at a distance from the first wall, but also at a distance from the second wall. Consequently, the pointed end of the bottle engages in the light of the second wall while its free end extends substantially in abutment against the partition. For example, the pointed end of the bottle is of conical shape with a substantially circular base.
[0012] Bottle here designates any container. It can thus be a bottle containing something other than perfume.
[0013] In this way, when the bottle equipped with its wedging device is engaged inside a case, and it falls in an orientation where the tip is oriented towards the ground wall, the pointed end of the bottle is retained at two levels. First of all, the second wall tends to deform and the lumen tends to enlarge under the effect of the thrust of the pointed end of the bottle. Such a deformation absorbs part of the kinetic energy of the bottle. Then, the partition tends to flex under the impact of the free end of the tip. Thus, it tends to resist the movement of the bottle relative to the wedging device. And consequently, this two-level energy absorption makes it possible to prevent the pointed end of the bottle from reaching the wall of the case.
[0014] According to a particularly advantageous implementation characteristic of the invention, said second wall is connected to said rear wall. Thus, the second wall is held on the rear wall. It then makes it possible to better resist the movements of the pointed end of the bottle in the event of a fall.
[0015] Furthermore, said first and second walls define a fold line forming a front edge. For example, the first wall and the second wall form an angle of between 40° and 60°.
[0016] Preferably, said partition extends obliquely relative to said first wall up to said fold line. In this way, the partition is held in engagement along the fold line between the first wall and the second wall. In this way, it is held in a fixed position inside the receiving volume. It then better resists deformation and buckling when the pointed end of the bottle impacts it.
[0017] According to a particularly advantageous embodiment of the invention, said second wall has two parts folded relative to each other, defining a transverse edge extending opposite said partition. In other words, the two parts of the second partition folded relative to each other make it possible to stiffen this second partition. It thus offers greater resistance to deformation. For example, the two parts are folded relative to each other at an angle of around 45°.
[0018] Advantageously, according to this embodiment variant, said light is arranged astride said transverse edge. In this way, the pointed end of the bottle passes precisely through the second wall on the edge.
[0019] According to a second object, the invention relates to a cardboard blank for forming a wedging device as described above.The cardboard blank comprises: a central panel extending longitudinally and having two opposite ends; a first flap hinged on one of said two ends of said central panel along a first fold line; a second flap hinged on said first flap opposite said central panel, along a second fold line parallel to said first fold line, said second flap having a central orifice; a third flap hinged on said second flap opposite said first flap along a third fold line parallel to said second fold line; a free flap hinged on said third flap opposite said second flap along a fourth fold line parallel to said third fold line; and, a fourth flap hinged on the other of said two ends of said central panel opposite said first flap along a fifth fold line.
[0020] Advantageously, to form a wedging device according to said aforementioned variant embodiment, said second flap has a first intermediate fold line parallel to said second fold line and dividing said central orifice and said second flap in two into a first second intermediate flap delimited by said second fold line and a second second intermediate flap delimited by said third fold line.
[0021] Preferably, said third flap has a second intermediate fold line parallel to said third fold line and dividing said third flap into a first third intermediate flap delimited by said third fold line and a second third flap delimited by said fourth fold line.
[0022] Thanks to the blank thus obtained, the wedging device can be transported flat and be implemented in situ by simply unfolding.
[0023] According to a third object, there is proposed according to the invention a method for producing a wedging device as described above. It comprises the following steps: a blank as described above is provided; said third flap is glued onto one of the two opposite faces of said blank; said free flap is folded along said fourth fold line opposite said one of said faces; said third flap is folded along said third fold line opposite said one of said faces; said second flap is folded along said second fold line and said first flap along said first fold line opposite said one of said faces to glue said glued third flap against said central panel opposite said one of said faces and at a distance from said fourth fold line.
[0024] According to a particularly advantageous embodiment, the method comprises the following steps: a blank is provided, preferably provided for a wedging device according to said aforementioned variant embodiment; said second third intermediate flap is glued, on the one hand, to one of the two opposite faces of said blank and, on the other hand, said first third intermediate flap is glued to the other of the two opposite faces of said blank; said free flap is folded along said fourth fold line opposite said one of said faces, while the two third intermediate flaps are folded against each other along said second intermediate fold line to glue them together and the glued third flaps are folded towards said second second flap;and, said first flap is successively folded opposite said one of said faces along said first fold line, said first second intermediate flap along said second fold line and said second second intermediate flap along said first intermediate fold line to glue said second third glued flap against said central panel opposite said one of said faces and at a distance from said first fold line.;
[0025] Thanks to this embodiment, the wedging device can be transported flat and be deployed in situ.
[0026] Other features and advantages of the invention will emerge from reading the description given below of particular embodiments of the invention, given for informational but non-limiting purposes, with reference to the appended drawings in which:
[0027] [Fig-1] is a schematic top view of a blank according to the invention for make a wedging device in accordance with the invention;
[0028] [Fig.2] is a schematic side view of a wedging device obtained from a blank illustrated in [Fig.l], in a first state;
[0029] [Fig.3] is a schematic side view of the wedging device illustrated in [Fig.2], in a second state;
[0030] [Fig.4] is a schematic side view of the wedging device illustrated in [Fig.3], in a third state;
[0031] [Fig.5] is a schematic detail view of the object of [Fig.4] in a first phase of implementation; and,
[0032] [Fig.6] is a schematic view of the object of [Fig.5] in a second phase of implementation.
[0033] [Fig.l] shows, seen from above, a blank 10 cut from a corrugated cardboard sheet and making it possible to form a wedging device according to the invention. The blank 10 extends in a longitudinal direction D, and over a length of between 380 mm and 420 mm in the example presented here. It has a first face 11 corresponding to the front of [Fig.l] and a second opposite face 13 corresponding to the rear of [Fig.l].
[0034] The corrugated cardboard used is a double-sided cardboard where a fluted paper is engaged between two sheets of flat paper. The fluted paper has a thickness of between 1 mm and 2 mm. Obviously, a corrugated cardboard of another shape and having other dimensions can be used.
[0035] Thus, the blank 10 comprises a central panel 12 of rectangular shape and having a first central panel end 14 opposite a second central panel end 16.
[0036] The blank 10 comprises a first flap 18, of rectangular shape, separated from the second end 16 of the central panel 12, by a first fold line 20. The first flap 18 is thus articulated on the central panel 12. Also, the first flap 18, which extends transversely with respect to the longitudinal direction D, has a length substantially equal to the width of the central panel 14.
[0037] The blank 10, in the extension of the first flap 18, has a second flap 22 of isosceles trapezoidal shape. It is separated from the first flap 18 by a second fold line 24, parallel to the first fold line 20. The second flap 22 is articulated on the first flap 18 along this second fold line 24.
[0038] Furthermore, the second flap 22 comprises a central orifice 25.
[0039] In the extension of the second flap 22, and opposite the first flap 18, the blank 10 has a third flap 26 of rectangular shape. It is separated from the second flap 22 by a third fold line 28, parallel to the second fold line 24. Thus, the third flap 26 is articulated on the second flap 22 around this third fold line 28.
[0040] It will be observed that the third flap 26 has a length, in the transverse direction, less than that of the first flap 18.
[0041] And in the extension of the third flap 26, opposite the second flap 22, the blank 10 has a first free flap 30 of generally rectangular shape. It is separated from the third flap 26 by a fourth fold line 32, parallel to the third fold line 28 and it has a free edge 31. The first free flap 30 has a length, in the transverse direction, equal to the length of the third flap 26.
[0042] According to the variant embodiment of the invention presented in [Fig. 1], the second flap 22 has a first intermediate fold line 34 parallel to the second fold line 24 and to the third fold line 28. The first intermediate fold line 34 divides the central orifice 25 in two.
[0043] Also, the first intermediate fold line 34 is spaced from the second fold line 24 and thereby brought closer to the third fold line 28.
[0044] In [Fig. 1], the first intermediate fold line 34 is located substantially two-thirds of the distance separating the second fold line 24 and the third fold line 28.
[0045] Thus, the first intermediate fold line 34 divides the second flap 22 into a first second intermediate flap 36 delimited by the second fold line 24 and the first intermediate fold line 34, and a second second intermediate flap 38 delimited by the third fold line 28 and the first intermediate fold line 34.
[0046] Furthermore, the third flap 26 has a second intermediate fold line 40, which is parallel to the third fold line 28 and to the fourth fold line 32. The second intermediate fold line divides the third flap 26 into a first third intermediate flap 42 delimited by the third fold line 28 and precisely the second intermediate fold line 40, and a second third intermediate flap 44, delimited by the fourth fold line 32 and the second intermediate fold line 40.
[0047] The second intermediate fold line 40 is substantially closer to the third fold line 28 than to the fourth fold line 32. And it extends at a distance from the third fold line 28 substantially equal to the distance which separates the latter from the first intermediate fold line 34.
[0048] Furthermore, the central panel 12 has two lateral flaps 46, 48 opposite one another. Their length, in the longitudinal direction D, is close to that of the central panel 12. And their width, in a transverse direction, is substantially equal to the width of the first panel 18.
[0049] The two lateral flaps 46, 48 are respectively articulated on the central panel 12 along two first lateral fold lines 47, 49.
[0050] In addition, at the first end of the central panel 14, and in its extension, a fourth flap 50 is articulated on the central panel 12 opposite the first flap. 18, according to a fifth fold line 52.
[0051] In its extension, the blank 10 has a second free flap 54 separated from the fourth flap 50 by a sixth fold line 56.
[0052] Also, the blank 10 has a lateral tab 58 articulated laterally on the fourth flap 50 along a second lateral fold line 60.
[0053] The lateral tab 58 has a length substantially less than twice the length of the fourth flap 50. On the other hand, its width is less than the width of the fourth flap 50.
[0054] It also has a median fold line 62, extending in the longitudinal direction D, and a third fold line 64, in the vicinity of the second lateral fold line 60 and parallel to it. The median fold line 62 divides the lateral tab 58 into two parts, a proximal part 66, and a distal part 68, substantially of the same length.
[0055] Furthermore, the lateral tab 58 itself has a half-moon tab 70 articulated on the proximal part 66 of the lateral tab 58. The half-moon tab 70 is close to the second free flap 54.
[0056] It will be observed that all the elements of the blank 10 as described above are to scale. In other words, their relative dimensions are those they have in reality.
[0057] The invention also relates to a method for producing a wedging device from the blank 10 as described above.
[0058] Thus, after having provided a blank 10 as illustrated in [Fig.l], a local gluing step is carried out on the two opposite faces 11, 13 of the blank 10. The first third intermediate flap 42 or the second third intermediate flap 44 is thus glued on the first face 11, and the second third intermediate flap 44 on the second face 13.
[0059] Next, the second third intermediate flap 44 is first folded towards the first face 11 and against the first third intermediate flap 42 along the second intermediate fold line 40, driving the first free flap 30. The first free flap 30 is then applied flat against the second flap 22. In this way, the two third intermediate flaps 42, 44 are glued together.
[0060] Then, the second flap 22 is folded along the second fold line 24, carrying the two third intermediate flaps 42 44 glued and the first free flap 30 applied to the second flap 22.
[0061] In this way, the second third intermediate flap 44 glued on the second face 13, comes to be applied against the central panel 12 at a distance from the first fold line 20. Thus, the second third intermediate flap 44 becomes integral with the central panel 12 and the fourth fold line 32 extends parallel at a distance from the first fold line 20.
[0062] In this way, three superimposed flat folds are obtained extending along the mean plane of the central panel 12. The second flap 22 folded against the first flap 18 along the second fold line 24 then forms a free end edge.
[0063] Conversely, the distal portion 68 of the lateral tab 58 is glued on the side of the second face 13 of the blank 10. The distal portion 68 is then folded against the proximal portion 66 along the median fold line 62, then the assembly against the fourth flap 50, so as to apply the glued face of the distal portion 68 against the fourth flap. In this way, three superimposed folds are obtained, linked together.
[0064] Next, the central panel 12 is raised relative to the fourth flap 50 by folding it along the fifth fold line 52.
[0065] And on the opposite side, the second free flap 54 is raised, which at the same time causes the half-moon tab 70 to pivot, which then remains substantially inclined relative to the three integral folds.
[0066] In this way, a wedging device 72 was produced as shown in [Fig.2]. [Fig.2] shows the main elements of the blank 10.
[0067] A bottle 74 is then inserted into the wedging device 72. The bottle 74 has a base 76 and an opposite conical stoppering member 78. The conical stoppering member has an axis of symmetry A and it ends with a free end 80. The bottle 74 is then placed against the central panel 12, while the base 76 rests on the three aforementioned integral folds.
[0068] Then, by exerting pressure according to arrow F on the free end edge at the level of the second fold line 24 between the two first flaps 18, 22, the first flap 18 is pivoted towards the first face 11 of the blank 10, and the second intermediate second flap 38 is caused to pivot towards the first third intermediate flap 42, according to the third fold line 28; the first intermediate second flap 36 then pivots towards the second intermediate second flap 38 along the first intermediate fold line 34, while the free end 80 of the conical plugging member 78 engages through the central orifice 25, as illustrated in [Fig. 3]. This central orifice 25 is located astride the intermediate fold line 34.
[0069] Concomitantly, the first flap 18 pivots the first free flap 30 along the fourth fold line 32.
[0070] By continuing to pivot the first flap 18, until it comes substantially at right angles to the central panel 12, the conical plugging member 78 comes to bear against the circular inner edge of the central orifice 25, while the first free flap 30 comes into contact with the free end 80 of the conical plugging member 78 as illustrated in [Fig.4].
[0071] Also, the free edge 31 of the first free flap 30 engages between the first flap 18 and the first second intermediate flap 36, in the acute angle that they form together and in the vicinity of the second fold line 24. And it will be observed that the first free flap 30 is inclined relative to the first flap 18. The angle of inclination is for example between 20° and 25°.
[0072] Furthermore, the first second intermediate flap 36 forms with the second second intermediate flap 38 an angle close to the right angle and thus contributes to stiffening the assembly. The second intermediate flaps 36, 38 thus define a transverse edge 81.
[0073] Furthermore, it will be observed that the second intermediate flaps 36, 38 are inclined substantially by 45° relative to the axis of symmetry A of the conical plugging member 78.
[0074] Thus, after the two lateral flaps 46, 48 have been raised relative to the central panel 12 and applied respectively against the two opposite walls of the bottle 74, the latter is further held in a fixed position inside the wedging device 72 between the first flap 18 and the fourth flap 50.
[0075] It will be observed that the arrangement accommodating the conical stopper member 78 can be produced in a manner equivalent to the successive steps above, in the following manner.
[0076] First of all, the first third intermediate flap 42 is glued onto the first face 11 and the second third intermediate flap 44 onto the second face 13.
[0077] Then, the first free flap 30 is folded along the fourth fold line 32 opposite the second face 13, while the two third intermediate flaps 42, 44 are folded against each other, along the second intermediate fold line 40 to glue them together and the glued third flaps 42, 44 are folded towards the second second flap 38 towards the second face 13. Then, the first flap 18 is folded successively towards the first face 11 along the first fold line 20, the first second intermediate flap 36 along the second fold line 24 and the second second intermediate flap 38 along the first intermediate fold line 34 to turn the glued second third flap 44 over and glue it against the central panel 12 opposite the side of the first face 11 and at a distance from the first fold line 20.
[0078] Whatever the embodiment, the assembly including the bottle 74 and the wedging device 72 is then inserted into a rectangular parallelepiped case 82, which makes it possible to keep the fourth flap 50 and the first flap 18 at right angles to the central panel 12 and consequently to keep the bottle 74 in a fixed position inside the wedging device 72.
[0079] Thus, the distal part 68, the proximal part 66 and the fourth flap 50, forming three superimposed folds linked together, form a bottom wall of the wedging device 72 on which the bottom of the bottle 76 rests.
[0080] The central panel 12 forms a rear wall raised relative to the wall background, and to which bottle 74 is attached.
[0081] The first flap 18 constitutes a first wall which extends substantially at right angles to the aforementioned rear wall and in line with the bottom wall.
[0082] The first second intermediate flap 36 forms with the second second intermediate flap 38 a second wall in which the central orifice 25, or light, is formed. And this second wall extends back to the rear wall, or central panel 12, forming a cylindrical receiving volume 84. The cylindrical receiving volume extends transversely with respect to the axis of symmetry A of the conical plugging device 78.
[0083] Furthermore, the first free flap 30 forms, inside the receiving volume 84, a partition secured to the rear wall, or central panel 12, at the level of the fourth fold line 32. The first free flap 30 extends between the first wall 18 and the second wall 36, 38 and opposite the central orifice 25.
[0084] In this way, such an arrangement makes it possible to preserve the bottle 74 and the case 82 in the event of a fall, as will be explained below with regard to [Fig.5] and [Fig.6].
[0085] Thus, when the bottle 74, inserted into its wedging device 72 and engaged in its case 82, is in free fall according to the arrow P as illustrated in [Fig.5], and the pointed stoppering device 78 is oriented downwards, the bottle 74, the wedging device 72 and the case 82 are in a fixed position relative to each other.
[0086] When the assembly reaches a floor wall 86, as shown in [Fig. 6], the conical stoppering member 78 is firstly retained by the second intermediate flaps 36, 38. Also, the inner edge of the central orifice 25 tends to deform and enlarge with the relative movement of the conical stoppering member 78 and the wedging device 72. Such deformation makes it possible to absorb a first part of the kinetic energy of the bottle.
[0087] Then, at a second level, the free end 80 of the conical stoppering member 78 in contact with the partition, or first free flap 30, causes it to bend. The first free flap 30 then absorbs a second part of the kinetic energy of the bottle. And this two-level energy absorption makes it possible to prevent the free end 80 of the conical stoppering member 78 from reaching the first flap 18 and hitting the wall of the case 82.
[0088] According to another variant embodiment, which will be described with reference to [Fig. 4], the second flap 22 does not have a first intermediate fold line 34, and it thus directly joins the second third intermediate flap 44 at the level of the second intermediate fold line 40.
[0089] In this way, the second flap 22 is flat and is integral with the central panel 12. The partition formed by the first free flap 30 maintains the same position. Thus, the wedging device, according to this other variant embodiment, also comprises two damping levels, one at the level of the second flap 22, and the other at the level of the first free flap 30.
[0090] Such an embodiment variant, simpler to implement, is envisaged for bottles having a similar closure member, but of a lower weight.
Claims
Claims
1. Cardboard wedging device (72) adapted to wedge, inside a case (82), a bottle (74) having a bottom (76) opposite a pointed end (78), characterized in that it comprises: - a bottom wall (50) and a rear wall (12) erected relative to said bottom wall, said bottle (74) being able to be placed against said rear wall (12), while said bottom (76) of said bottle rests on said bottom wall (50); - a first wall (18) extending at right angles to said rear wall (12) and in line with said bottom wall (50); - a second wall (22) having a light (25) and extending said first wall (18) by extending back to said rear wall (12) by defining a transverse cylindrical receiving volume (84);and in that it further comprises a partition (30) integral with said rear wall (12) and extending inside said receiving volume (84) between said first wall (18) and said second wall (22) opposite said lumen (25), said pointed end (78) of said bottle being adapted to extend into said receiving volume (84) as far as said partition (30) by crossing said lumen, whereby, when said pointed end (78) and said second wall (22) are driven towards each other, said second wall (22) and said partition (30) are able to deform to resist the relative movement of said pointed end and said second wall.;
2. Wedging device according to claim 1, characterized in that said second wall (22) is connected to said rear wall (12).
3. Wedging device according to claim 1 or 2, characterized in that said first (18) and second (22) walls define a folding line (24) forming a front edge.
4. Wedging device according to claim 3, characterized in that said partition (30) extends obliquely relative to said first wall (18) up to said folding line (24).
5. Wedging device according to any one of claims 1 to 4, characterized in that said second wall (22) has two parts (36, 38) folded relative to each other, defining a transverse edge (81) extending opposite said partition (30).
6. Wedging device according to claim 5, characterized in that said light (25) is arranged astride said transverse edge (81).
7. Cardboard blank for forming a wedging device according to any one of claims 1 to 4 characterized in that it comprises: - a central panel (12) extending longitudinally and having two opposite ends (14, 16); - a first flap (18) hinged on one (16) of said two ends of said central panel along a first fold line (20); - a second flap (22) hinged on said first flap (18) opposite said central panel (12), along a second fold line (24) parallel to said first fold line (20), said second flap having a central orifice (25); - a third flap (26) hinged on said second flap (22) opposite said first flap along a third fold line (28) parallel to said second fold line; - a free flap (30) hinged on said third flap (26) opposite said second flap along a fourth fold line (32) parallel to said third fold line;and, - a fourth flap (50) hinged on the other (14) of said two ends of said central panel opposite said first flap (18) along a fifth fold line (52).;
8. Cardboard blank according to claim 7 for forming a wedging device according to claim 5 or 6, characterized in that said second flap (22) has a first intermediate fold line (34) parallel to said second fold line (24) and dividing said central orifice (25) and said second flap (22) in two into a first second intermediate flap (36) delimited by said second fold line (24) and a second second intermediate flap (38) delimited by said third fold line (28).
9. Cardboard blank according to claim 8, characterized in that said third flap (26) has a second intermediate fold line (40) parallel to said third fold line and dividing said third flap into a first third intermediate flap (42) delimited by said third fold line (28) and a second third intermediate flap (44) delimited by said fourth fold line (32).
10. Method for producing a wedging device according to any one of claims 1 to 4, characterized in that it comprises the following steps: - a blank according to claim 7 is provided; - said third flap (26) is glued onto one of the two opposite faces (11, 13) of said blank; - said free flap (30) is folded along said fourth fold line (32) opposite said one of said faces; - said third flap (26) is folded along said third fold line (28) opposite said one of said faces; - said second flap (22) is folded along said second fold line (24) and said first flap (18) along said first fold line (20) opposite said one of said faces to glue said third glued flap (26) against said central panel (12) opposite said one of said faces and at a distance from said first fold line (20).
11. Method for producing a wedging device according to claim 10 and 5 or 6, characterized in that it comprises the following steps: - a blank according to claim 9 is provided; - said second third intermediate flap (44) is glued on one (13) of the two opposite faces of said blank (10) and said first third intermediate flap (42) on the other (11) of the two opposite faces of said blank; - said free flap (30) is folded along said fourth fold line (32) opposite said one (13) of said faces, while the two third intermediate flaps (42, 44) are folded against each other along said second intermediate fold line (40) to glue them together and the glued third flaps (42, 44) are folded towards said second second flap (38); - said first flap (18) is successively folded opposite said one (13) of said faces along said first fold line (20), said first second intermediate flap (36) along said second fold line (24) and said second second intermediate flap (38) along said first intermediate fold line (34) to glue said second third glued flap (44) against said central panel (12) opposite said one (13) of said faces and at a distance from said first fold line (20).