EP2913275B1 - Pre-cut blank for manufacturing a box with a built-in pour spout - Google Patents

Description

The present invention relates to the technical field of packaging of bulk products that should be able to pack, present for sale and distribute directly from said packaging.

The object of the invention relates more particularly to the packaging of bulk products such as, for example, sugar or salt, using a box or a case obtained by folding and gluing a pre-cut blank made of semi-rigid material such as cardboard.

In the state of the art, it has been proposed many variants of packaging boxes provided with a spout adapted to dispense the product contained in such boxes. For example, there is known a cardboard packaging box of parallelepipedal general shape comprising four panels arranged parallel and delimited by fold lines. These panels define, once folded, a perimeter envelope whose open transverse ends are closed by flaps extending from at least some of the panels.

This cardboard packaging box is provided with a spout usually metal, reported by any appropriate means on the box. If this box is satisfactory with regard to its functions of storage and distribution of the bulk product, the major disadvantage of this solution is the recycling of this box which is made mainly of cardboard but which also incorporates a metal spout covered with an adhesive label used as tamper evidence. Moreover, the mounting of the metal spout on the box completed by the establishment of the inviolability label is an operation that significantly increases the cost of manufacturing such a box.

Cardboard packaging boxes made of a single material from a pre-cut blank and provided with a spout are known from US2007 / 0181657 , DE 102005018683 , DE 10205467 , CH 689210 and EP 0529260 .

The present invention aims to remedy the drawbacks of the prior art by proposing a new pre-cut blank to constitute a bulk product packaging box, made of a single material, in particular cardboard, and provided with a spout for the distribution said bulk products.

Another object of the invention is to be able to provide a new pre-cut blank to constitute on its own, without any other added part, a box packaging having a spout provided with an inviolability indicator easy to achieve.

Another object of the invention is to be able to provide a new pre-cut blank to constitute a packaging box having a spout that can be opened and closed repeatedly while performing its functions of closing the box and dispensing the bulk product. .

To achieve such objectives, the object of the invention relates to a pre-cut blank for the constitution of a packaging box comprising at least three panels arranged in parallel, delimited by fold lines, provided for at least some of them of flaps, and defining, once folded, a perimetric envelope whose open transverse ends can be closed by said flaps, one of the end panels being provided with an extension, a cutout being arranged in overlap of a fold line between two adjacent panels and in that an articulated tongue in the form of dihedron is arranged in the extension being connected to the extension by a pivot line and by a breakable attachment zone, the tongue coming, after folding of the extension to the inside the envelope, occupy a closed position of the cut, and, after the rupture of the attachment zone and the pivoting of the tongue head, occupy a dispensing position in which the tongue extends through the cutout forming a spout.

• la languette est pourvue, à l'opposé de la ligne de pivotement, d'une butée de limitation de son extension à travers la découpe,
• le prolongement comporte un panneau de liaison articulé d'un côté, au panneau extrême et du côté opposé, à un panneau d'appui à l'aide d'une ligne de pliage alignée sur une arête de pliage de deux demi-languettes formant la languette en forme de dièdre,
• l'une des demi-languettes dite de d'articulation est reliée au panneau de liaison par la ligne de pivotement et par la zone d'attache sécable tandis que l'autre demi-languette dite de glissement est découpée dans le panneau d'appui en étant pourvue de la butée,

• les demi-languettes présentent des formes générales triangulaires jointives au niveau de l'arête de pliage,
• le panneau d'appui présente une partie découpée délimitant la partie de la demi-languette de glissement pour constituer une zone de dégagement lors de la formation du bec verseur,
• la demi-languette de glissement comporte un talon d'appui s'étendant à partir de l'arête de pliage et dans le prolongement de la ligne de pivotement,
• le panneau d'appui est relié à l'opposé du panneau de liaison, à un contre-panneau destiné à être replié contre le panneau d'appui pour servir de guide à la languette.

The blank according to the invention also comprises in combination one and / or the other of the following additional characteristics:

• the tab is provided, opposite the pivot line, an abutment limiting its extension through the cut,
• the extension comprises a connecting panel articulated on one side, at the end panel and on the opposite side, to a support panel by means of a fold line aligned on a folding edge of two half-tongues forming the tongue shaped dihedron,
• one of the so-called hinge half-tongues is connected to the connecting panel by the pivot line and the breakable fastening zone while the other so-called sliding half-tongue is cut in the support panel by being provided with the stop,

• the half-tongues have contiguous triangular general shapes at the level of the folding edge,
• the support panel has a cut-out portion delimiting the portion of the half-sliding tongue to constitute a zone of clearance during the formation of the pouring spout,
• the half-slip tongue comprises a bearing heel extending from the folding edge and in the extension of the pivot line,
• the support panel is connected to the opposite of the connecting panel, to a counter-panel intended to be folded against the support panel to act as a guide to the tongue.

Another object of the invention is to provide a new packaging box with a spout obtained exclusively by folding and gluing of a precut blank according to the invention.

The object of the invention is therefore to provide in one piece, a packaging box with a spout.

The packaging box according to the invention comprises at least three panels arranged in parallel, delimited by fold lines, provided for at least some of them, flaps and defining once folded, a perimeter envelope whose open transverse ends are closed by said flaps, one of the end panels being provided with a folded extension and fixed inside the envelope while a cutout is arranged in overlap of a fold line said cut between two adjacent panels said pivoting and guiding, an articulated tongue shaped dihedral being arranged in the extension being connected to the extension by a pivot line and a breakable fastening zone, the tongue coming to occupy a closed position of the cut and after the rupture of the attachment zone, occupy a dispensing position in which the tongue extends through the cutout forming a spout.

• la languette comporte deux demi-languettes dites d'articulation et de glissement s'étendant de part et d'autre d'une arête de pliage alignée avec la ligne de pliage découpée lorsque la languette occupe sa position de fermeture, la demi-languette d'articulation s'étendant par sa ligne de pivotement le long d'un bord d'appui de la découpe aménagé dans le panneau de pivotement tandis que la demi-languette de glissement s'étend de l'autre côté de ladite ligne de pliage découpée de manière qu'une traction ou poussée à partir de l'arête de pliage conduit au pivotement de la demi-languette d'articulation et le coulissement de la demi-languette de glissement,
• la demi-languette de glissement coulisse entre un contre-panneau faisant partie du prolongement, et le panneau de guidage.

The packaging box, according to the invention, also comprises in combination the following additional characteristics:

• the tongue comprises two so-called hinge and sliding half-tongues extending on either side of a folding edge aligned with the folded cutting line when the tongue is in its closed position, the half-tongue of hinge extending through its pivot line along a bearing edge of the cut-out in the pivot panel while the half-slip tongue extends to the other side of said cut fold line so that pulling or pushing from the folding edge leads to pivoting of the hinge half-tongue and sliding of the sliding half-tongue,
• the half-sliding tongue slides between a counter panel forming part of the extension, and the guide panel.

• La figure 1 est une vue en plan développé d'un flan prédécoupé conforme à l'invention pour l'obtention d'une boîte de conditionnement conforme à l'invention.
• La figure 2 est une vue en perspective, en position fermée, d'une boîte de conditionnement obtenue à partir d'un flan conforme à l'invention.
• Les figures 3 , 4 et 5 sont des vues en perspective mettant en évidence certaines phases opératoires de la boîte de conditionnement obtenue à partir du flan illustré à la figure 1 .
• La figure 6 est une vue en perspective d'une boîte de conditionnement conforme à l'invention avec le bec verseur en position de distribution du produit conditionné.
• La figure 1 représente le flan prédécoupé F conforme à l'invention, vu par sa face dite externe, c'est-à-dire celle qui, après conformation, définira l'extérieur d'une boîte de conditionnement 1 ( figures 2 et 6 ). Les lignes de coupe sont représentées à la figure 1 en traits épais tandis que les lignes de pliage sont représentées en traits fins.

Various other characteristics appear from the description given below with reference to the accompanying drawings which show, by way of non-limiting examples, embodiments of the subject of the invention.

• The figure 1 is a developed plan view of a pre-cut blank according to the invention for obtaining a packaging box according to the invention.
• The figure 2 is a perspective view, in the closed position, of a packaging box obtained from a blank according to the invention.
• The figures 3 , 4 and 5 are perspective views highlighting certain operating phases of the conditioning box obtained from the blank shown in FIG. figure 1 .
• The figure 6 is a perspective view of a packaging box according to the invention with the spout in the dispensing position of the packaged product.
• The figure 1 represents the pre-cut blank F according to the invention, seen by its so-called external face, that is to say the one which, after conformation, will define the outside of a conditioning box 1 ( figures 2 and 6 ). The cutting lines are represented at the figure 1 in thick lines while the fold lines are represented in fine lines.

The pre-cut blank F for the constitution of the box 1 has a generally rectangular shape and comprises at least three perimeter panels and, in the example shown, four perimeter panels 2, 3, 4 and 5 of generally rectangular shape arranged parallel to each other. being delimited by successive parallel fold lines 6, 7, 8 and 9. The first and third perimeter panels namely 2 and 4 have the same width while the second and fourth perimeter panels namely 3 and 5 also have the same width . The perimeter panels 2, 3, 4 and 5 are thus intended to allow, by folding along the fold lines 6, 7, 8 and 9, the constitution of a perimetric envelope of substantially parallelepipedal shape whose open transverse ends can be closed. by means of flaps 11 which extend beyond fold lines 12, at the end of the perimeter panels. The fold lines 12 are arranged at the end of each end of the panels, in a direction substantially perpendicular to the fold lines 6, 7, 8 and 9 between the panels.

In the illustrated example, the perimeter envelope constituted by the perimeter panels has a rectangular section. Of course, the object of the invention can be implemented for a perimeter envelope of different section such as triangular or pentagonal.

According to the invention, the blank F comprises a cutout 14 arranged in overlapping of a fold line between two adjacent perimeter panels and intended to constitute the dispensing opening for the product contained in the box 1, as will be explained in following the description. In the example illustrated, the cutout 14 is arranged in overlapping of the fold line 6 between the first and second perimeter panels respectively called pivot panels 2 and guide 3. Advantageously, the cutout 14 is arranged near a line 12 at the end of one end of the pivoting panels 2 and guide 3.

Of course, the blank 14 may be made on a different fold line, for example the fold line between the second and third perimeter panels 3, 4. In the following description, the overlapping fold line of which is made the cutout 14 is called the cut-off line 6.

In the illustrated example, the cutout 14 has a support edge 14a arranged at an angle in the pivot panel 2 from the cut fold line 6, towards the fold line 12 adjacent. For example, the support edge 14a extends in a direction forming an angle of the order of 45 ° with respect to the cut fold line 6. The support edge 14a is connected to an end edge 14b arranged substantially parallel to the fold line 12 adjacent to the cut fold line 6.

The cutout 14 also has a clearance edge 14c arranged obliquely in the guide panel 3 from the cut fold line 6 and more precisely from the starting point of the support edge 14a. The clearance edge 14c is arranged towards the fold line 12 adjacent in a direction forming an angle of the order of 45 ° with respect to the cut fold line 6. The clearance edge 14c is connected to an edge of 14d link arranged obliquely to the end edge 14b of the cut. The cutout 14 thus has, by its support edges 14a and clearance 14c, a triangular shape whose apex of the triangle is located substantially along the cut fold line 6 and directed in the opposite direction of the neighboring fold line 12.

According to the invention, the blank F has an extension P which extends beyond the fold line 9 between the extreme perimeter panel, namely the fourth panel 5, and the extension P. The extension P does not define the perimeter envelope and is intended to be superimposed inside the perimeter envelope. The extension P is therefore distinct from the perimeter panels defining the perimeter envelope.

According to the invention, an articulated tongue 15 in the form of a dihedral is arranged in the extension P , being connected to the extension P by a pivot line 16 and by a breakable attachment zone 17. As will be explained in the following the description, the tongue 15, comes after folding of the extension P within the perimetric envelope, occupy a closed position of the cutout 14, and, after the rupture of the attachment zone 17 and the pivoting of the tongue, occupy a dispensing position in which the tongue 15 extends through the cutout forming a spout.

The tongue 15 has two so-called hinge half-tongues 15a and sliding 15b extending on either side of a folding edge 19. Thus, the half-hinge tongue 15a is arranged in a panel of link 21 forming part of the extension P. This connecting panel 21 is articulated on one side, by the fold line 9, the extreme perimeter panel namely the fourth panel 5 and the opposite side, to a support panel 22 to using a folding line 23. As is apparent from the figure 1 , the fold line 23 between the connecting panel 21 and the support panel 22 is parallel to the fold lines 6, 7, 8, 9 and aligned with the folding edge 19 of the tongue.

According to a characteristic of the invention, the fold line 23 between the connecting panel 21 and the support panel 22 is intended to come, after folding of the extension P inside the envelope, in the position of superposition with the cut folding line 6. For this purpose, the width of the connecting panel 21 taken between the fold lines 9 and 23 is equal to the width between the cut fold line 6 and the free edge of the first perimeter panel 2 of the envelope. In the illustrated example, this width is equal to the width of the first perimeter panel 2. In the case where the cutout 14 is arranged in overlap of the fold line 7 between the second and third perimeter panels 3 and 4, then this width is equal to the sum of the widths of the second and third perimeter panels 3 and 4.
link 21 advantageously has from the fold line 9, a portion 21a forming a fastening flap on the first panel 2, extending over the entire height of the adjacent panel 5. Beyond this fastening flap 21a , the extension P has a reduced height adapted to allow the realization of the tab 15.

The hinge half-tongue 15a is connected to the connecting panel 21 by the pivot line 16 and by the breakable attachment zone 17. Advantageously, the pivot line 16 extends with respect to the folding edge 19 in the same direction or inclination as the support edge 14a so as to extend at this support edge 14a in the mounted position of the tongue 15. The length of the pivot line 16 is advantageously slightly less than the length of the support edge 14a to allow the half-hinge tongue 15a to be able to pass through the cutout 14.

The pivot line 16 thus extends towards an edge 21b of the connecting panel 21 which is located in the extension of the fold line 12. This pivot line 16 thus extends to a cutout 24 arranged in the connecting panel 21 leaving the fastening area 17 with this connecting panel 21. The pivot line 16 extends in the opposite direction from the edge 21b of the connecting panel 21, to the folding edge 19.

The cutout 24 is located at a distance from the edge 21b of the connecting panel 21 which is greater than the distance between the end edge 14b of the cutout 14 and the fold line 12 arranged in the extension of the edge 21b of the connecting panel 21. Such an arrangement allows the half-hinge tongue 15a to be able to pass through the cutout 14. In fact, the surface of the hinge half-lug 15a is smaller than the passage section of the cutout 14 provided in FIG. pivot panel 2. The portion of the passage section of the cutout 14 formed in the pivot panel 2 which is not occupied by the half-hinge tongue 15a is closed by the connecting panel 21 located between the cutout 24 and the neighboring edge 21b.

The attachment zone 17 has a one-off character in the sense that a thrust force makes it possible to break the connection between the half-hinge tongue 15a and the connecting panel 21 so that the tongue 15 is then bound or attached. the extension P only by the pivot line 16. The tongue 15 forming the spout is thus integrated directly to the blank F without the addition of additional fastening means. As will be understood in the remainder of the description, this attachment zone 17 constitutes a tamper-proof or non-opening indicator of the box 1.

The pivot line 16 extends in the opposite direction from the edge 21b of the connecting panel 21, to the folding edge 19. The half-hinge tongue 15a thus has a generally triangular shape.

The half-sliding tongue 15b is cut completely in the support panel 22. Advantageously, the half-sliding tongue 15b has a bearing heel 15c extending from the folding edge 19 and in the extension of the pivot line 16. The half-sliding tongue 15b comprises from this support heel 15c, a bearing edge 15d inclined relative to the folding edge 19, at an inclination value greater than the inclination of the clearance edge 14c with respect to the cut folding line 6 so that the half-sliding tongue 15b has a surface greater than the opening of the cutout 14 formed in the guide panel 3.

The half-sliding tongue 15b thus has a generally triangular contiguous shape at the level of the folding edge 19, with the half-hinge tongue 15a. It should be noted that the vertex of the triangle formed by the half-tongues of articulation 15a and sliding 15b is not located in the extension of the folding edge 19 but is located at the level of the support heel 15c which is arranged in the support panel 22, from the folding edge 19. A cutout 26 is preferably arranged in the support panel 22 bordering the support heel 15c and overlapping the fold line 23 between the connecting panel 21 and the support panel 22.

According to an advantageous embodiment, the half-slip tab 15b is provided, opposite the pivot line, a stop 15e limiting the extension of the tongue through the cutout 14. This stop 15e is arranged from a cut edge 15f of the half-sliding tongue 15b , extending in the extension of the cutout 24. Advantageously, the support panel 22 has a cut-out portion 22a delimiting the cut edge 15f of the sliding half-tongue 15b to form a release zone for the half-sliding tongue during the formation of the spout.

According to an advantageous variant of embodiment, the support panel 22 is connected opposite the connecting panel 21, to a counter-panel 28, along a fold line 29 parallel to the fold line 23 between the connecting panel 21 and the support panel 22. The against panel 28 is intended to be folded against the support panel 22 to act as a guide to the tongue 15, as will be explained in the following description.

From the blank F described above, the constitution of the box 1 follows directly from the foregoing description.

The shaping of the packaging box according to the invention consists of starting from the pre-cut blank F to make successive bends along the fold lines 6, 7, 8, 9, 23 and 29 in a folding direction intended to constitute a perimetric envelope constituted by the perimeter panels 2, 3, 4 and 5, with the extension P which is folded inside this envelope ( Figure 3 ). In other words, the four perimeter panels 2, 3, 4, 5 form the outer walls of the box 1 inside which the extension P is positioned against the inner face of the panels.

As is clear from the Figures 3 to 5 , the extension P is positioned inside the perimetric envelope so that the fold line 23 between the connecting panel 21 and the support panel 22 coincides in superposed position with the cut fold line 6. The connection panel 21 of the extension P extends against the first perimeter panel or pivot panel 2 while the support panel 22 extends against the second perimeter panel or guide panel 3 which forms with the first panel 2 an angle of 90 ° in the example shown. Thus, the articulation tongue 15a extends substantially perpendicularly to the sliding tongue 15b while being attached by the folding edge 19.

The half-hinge tongue 15a is thus positioned so that its pivot line 16 is established along the bearing edge 14a of the cutout 14 formed in the pivot panel 2 while the half-slip tongue 15b extends to close the opening on the guide panel 3.

Fixing the extension P inside the box is ensured by a bonding of the connecting flap 21a of the connecting panel 21 against the pivot panel 2 and between the guide panel 3 and the support panel 22. Moreover , the backboard 28 is fixed on the support panel 22 to be able to guide the half-slip tab 15b.

In this position, it should be noted that the half-hinge tongue 15a is located opposite the portion of the cutout 14 arranged in the pivot panel 2 while the half-sliding tongue 15b comprises a portion positioned in front of the portion of the cutout 14 formed in the guide panel 3, and another portion located between the backboard 28 and the guide panel 3. This half-sliding tongue 15b is thus constantly pressed against a inner face of the guide panel 3 being guided during its sliding.

In this mounting position in which the flaps 11 are glued, the packaging box 1 is a hermetically sealed box and closed to the extent that the cutout 14 is perfectly closed by the tongue 15. The box 1 which allows the packaging of products in bulk such as salt or sugar and the distribution of the products by its spout is obtained only using a single blank F material.

Before the first use, the tongue 15 is fixed to the extension P via the attachment zone 17 ( Figures 2 , 3 , 4 ). When first use, a thrust force on the half-articulation tongue 15a leads to the rupture of the breakable fastening zone 17.

A tensile force exerted on the tongue 15 leads to ensure its pivoting around the hinge pivot line 16 leading simultaneously to the sliding of the half-slip tab 15b so that the half-tongues 15a, 15b passing through the cutout 14 to protrude from the pivot panel 2.

As is clear from the figure 6 , the tongue 15 forms a dihedral from the folding edge 19 extending obliquely and projecting from the cut fold line 6 to form a spout.

It should be noted that during the tensile force, the tongue 15 remains supported by its heel 15c on the panel 3 thus opposing the effort of opening the spout. The opening of the spout is limited by the abutment of the abutment 15e against the pivot panel 2. The product contained inside the box can thus be poured at will from the cut 14 open.

Pressing on the tongue at the folding edge 19 leads to the retraction of the tongue and, in particular, to the reverse pivoting of the articulation part 15a while the half-sliding tongue 15b enters the space located between the backboard 28 and the guide panel 3, being kept pressed against the guide panel 3.

This arrangement allows to hermetically close the conditioning box 1 according to the invention.

It follows from the foregoing description that the pre-cut blank F according to the invention makes it possible to produce a box with an integrated pouring spout without the addition of parts or complementary elements. Indeed, the precut blank F alone allows to constitute a packaging box with a spout with a tamper evidence while being reused at will. The box 1 according to the invention is in the form of a single piece that is to say the blank F precut and glued.

The invention is not limited to the examples described and shown because various modifications can be made without departing from its scope.

Claims (12)

1. A pre-cut blank for forming a packing box comprising at least three perimeter panels (2, 3, 4, 5) positioned in parallel, delimited by fold lines (6, 7, 8, 9) provided with flaps (11) for at least some of them and defining, once folded, a perimeter shell of which the open transverse ends can be closed by said flaps, one of the end perimeter panels being provided with an extension (P), characterized in that a cutout (14) is provided straddling a fold line (6) between two adjoining panels and in that an articulated tab (15) in the form of a dihedral is provided in the extension (P) by being connected to the extension by a pivot line (16) and by a scored attachment zone (17), the tab (15), after folding the extension inside the perimeter shell, occupying a position closing the cutout (14) and, after tearing of the attachment zone (17) and pivoting of the tab (15), occupying a distribution position in which the tab (15) extends through the cutout, forming a spout.
2. The pre-cut blank according to claim 1, characterized in that the tab (15) is provided, opposite the pivoting line (16), with an abutment (15e) for limiting its extension through the cutout.
3. The pre-cut blank according to claims 1 or 2, characterized in that the extension (P) includes a connecting panel (21) articulated, on one side, to the end perimeter panel (5) and, on the opposite side, to a support panel (22) by means of a fold line (23) aligned on a folding edge (19) of two half-tabs (15a, 15b) forming the dihedral-shaped tab.
4. The pre-cut blank according to claim 3, characterized in that one so-called articulation half-tab (15a) is connected to the connection panel (21) by the pivot line (16) and by the scored attachment zone (17), while the other so-called sliding half-tab (15b) is cut out of the support panel (22) while being provided with the abutment (15e).
5. The pre-cut blank according to claims 3 or 4, characterized in that the half-tabs (15a, 15b) have generally triangular shapes joined at the folding edge (19).
6. The pre-cut blank according to claims 3 or 4, characterized in that the support panel (22) has a cutout portion delimiting the portion of the sliding half-tab (15b) to constitute a disengagement zone during formation of the spout.
7. The pre-cut blank according to claims 3 or 4, characterized in that the sliding half-tab (15b) includes a support bracket (15c) extending from the folding edge (19) and in the extension of the pivot line (16).
8. The pre-cut blank according to claims 3 or 4, characterized in that the support panel (22) is connected to a counter-panel (28) opposite to the connection panel (21), intended to be folded against the support panel (22) to serve as a guide for the tab.
9. A packing box characterized in that it is obtained by folding and gluing the pre-cut blank (F) according to one of claims 1 to 8.
10. The packing box according to claim 9, characterized in that it comprises at least three perimeter panels (2, 3, 4, 5) positioned in parallel, delimited by fold lines (6, 7, 8, 9) provided with flaps (12) for at least some of them, and defining, once folded, a perimeter shell the transverse ends whereof are closed by said flaps, one of the end perimeter panels being provided with a folded extension (P) and attached to the inside of the perimeter shell, while a cutout (14) is provided straddling a so-called cutout fold line (6) between two adjoining so-called pivoting (2) and guiding (3) perimeter panels, an articulated tab (15) in the form of a dihedral being provided in the extension (P) by being connected to the extension by a pivot line (16) and by a scored attachment zone (17), the tab occupying a closing position of the cutout and, after tearing of the attachment zone (17), occupying a distribution position in which the tab extends through the cutout, forming the spout.
11. The packing box according to claim 10, characterized in that the tab (15) includes two so-called articulation (15a) and sliding (15b) half-tabs, extending on either side of a folding edge (19) aligned with the cut fold line (6) when the tab (15) occupies its closing position, the articulation half-tab (15a) extending by its pivoting line (16) along a support edge (14a) of the cutout (14a) provided in the pivot panel (2), while the sliding half-tab (15b) extends from the other side of said cut fold line (6) so that tension or pressure from the folding edge (19) leads to pivoting of the articulation half-tab (15a) and to sliding of the sliding half-tab (15b).
12. The packing box according to claim 11, characterized in that the sliding half-tab (15b) slides between a counter-panel (28) incorporated in the extension (P) and the guiding perimeter panel (3).

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