FR2767788A1 - OPENING SYSTEM AND PACKAGE COMPRISING SAME - Google Patents

Abstract

The invention relates to a device for separating two adjoining parts (20a, 20b) from the wall (24) of an article (20) along a dividing line, at least one of the parts constituting a working part (20a According to the invention, the device comprises a longitudinal reinforcing and guiding element (30) integral with the wall at least on the dividing line, this element having a shear strength and a resistance to tearing greater than the shear strength of said wall (24), at least one line of precuts (32) parallel to said partition line and made up of perforations (40) passing through said wall (24) of said article and said member (30) so as to share said element in a guide portion (36) of the separation and in a reinforcing portion (38) of the edge of at least said useful part of the wall, and gripping means (34) integral with said guide portion of said element.Application to a cardboard packing case on dulé subsequently serving as a display for the products contained in the box.

Description

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  The invention relates to a device for separating two adjoining parts of the wall of an article along a dividing line, a corrugated cardboard box comprising this device and the manufacturing method.

of this separation device.

  There are packages, preferably of corrugated cardboard, or any other material, intended to protect the products which they contain during their storage and / or their transport, on the one hand, and to be used as display for these products when those - these are placed on the shelves in the store, on the other hand. Thanks to these packaging, it is no longer necessary to take the products out of their packaging and then arrange them one by one by stacking them on the corresponding shelf of the store. So far, these packages consist of a cardboard box made from a

  corrugated board that has undergone different cutting operations, perfo-

  ration, folding and assembly in order to form a rectangular box easily transportable and stackable whether in its flat position and

  folded or in its three-dimensional deployed position.

  To allow the separation into two parts of this box, devices are known which provide for a line of pre-cuts to be made in order to delimit the upper part of the box, intended to be discarded after its

  opening, of the lower part of the box, comprising the bottom of the box.

  After having been separated and detached from the upper part, this lower part serves

  presentation device for the products contained in the box.

  It can be seen that the separation between the two parts of the body is not easy and rapid. In addition, once separated, the two parts have an edge with an irregular contour because the cardboard tears badly at the attachment points connecting the precuts, which creates a loss of time and a defect in the appearance of the device. of presentation, this being a drawback to highlight the products contained in

  cash in the eyes of consumers.

  The invention aims to provide a separation device and a box comprising it not having the aforementioned drawbacks. To this end, the invention aims to provide a device for the separation of two adjoining parts of the wall of an article which allows easy separation,

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  safe and fast between the two parts, at least one of the two parts

  having, after separation, a regular and clean edge.

  This object is achieved by the fact that the device comprises - a longitudinal reinforcing and guiding element integral with the wall at least on the dividing line, this element having a shear strength and a tearing strength greater than the strength at the shearing of said wall, - at least one pre-cut line parallel to said partition line and consisting of perforations passing through said wall of said article and said element so as to divide said element into a guiding portion of the separation and into a portion of reinforcement of the edge of at least said useful part of the wall, and - gripping means integral with said guide portion of said element. Another object of the present invention is to provide a method of manufacturing a separation device which does not include the aforementioned drawbacks. This object is achieved thanks to a manufacturing process characterized in that it comprises the following steps: - an article is provided having a wall comprising two adjoining parts intended to be separated along a dividing line, at least one of the parts constituting a useful part, - one has on said partition line a longitudinal reinforcing and guiding element delimiting at least partially said dividing line, this element having a shear strength and a tear resistance greater than the shear resistance of said wall, - the said element is fixed to said wall of said article, at least on said partition line, - perforations are made crossing said element and said wall of said article along at least one line of precuts parallel to said dividing line so as to divide said element into a guiding portion of the separation and into a port reinforcement ion of the edge of at least said useful part of the wall, and

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  - Gripping means are made integral with said portion of

guiding said element.

  According to a characteristic of the present invention, in a corrugated cardboard box which comprises the separation device object of the present invention, it is provided that said element is arranged continuously on the four side walls of said box, said dividing line sharing the body in a first part and in a second part, in that said gripping means are arranged at said second part so that at least said first part constitutes a useful part after

separation between said parts.

  It is understood that, during the separation of the body into two parts, the line of pre-cuts separates the longitudinal element into a guiding portion of the separation integral with the gripping means and into a reinforcement portion of the edge of the useful part of the box. Indeed, to separate the body into two parts, it suffices to grasp the gripping means and to pull on them so that the guide portion of the longitudinal element and the cardboard wall on which it is detached according to

  the pre-cut line, of the useful part including the reinforcement portion.

  During this separation, the reinforcing portion of the longitudinal element prevents the cutting from being carried out randomly and irregularly along the port of the useful part since the reinforcing portion prevents the phenomenon of tearing off the cardboard at the level attachment points

  located between the perforations in the pre-cut line.

  It is further understood that the reinforcing portion of the longitudinal element prevents, after the separation between Ics two parts of the box, the delamination of the cardboard wall at the edge of the useful part and

  strengthens the resistance to deformation of this part.

  Furthermore, it is provided that, preferably, said element is a rectilinear strip arranged on the inner surface of the side walls of the box and that the useful part comprises the bottom of the box so that, after the separation between the parts , the useful part serves as a presentation device

  of products contained in the case.

  A corrugated box comprising the separation device according to the present invention has numerous advantages. In

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  Indeed, the cost price of such a box is barely higher than that of the boxes of the prior art, the longitudinal reinforcing element constituting the only addition of additional material. When this longitudinal element is

  consisting of a band, placed inside or outside the box, this

  This does not prevent the printing of all the necessary information on the cash register. Thanks to the invention, the time required to open and separate the box into two parts is reduced without risking damaging the edge of the useful part because the separation device according to the invention ensures

fast, reliable and clean cutting.

  The invention will be better understood, and characteristics

  side effects and their advantages will become apparent during the description of

  several embodiments given below by way of examples.

  It is understood that the description and the drawings are given only

indicative and not limiting.

  Reference will be made to the accompanying drawings, in which: - Figure I is a perspective view of an open box comprising the separation device according to the invention; - Figure 2 is a perspective view of the box of Figure 1 after it has been filled with closed products; - Figure 3 shows the box of Figure 2 at the start of the separation operation between the two parts of the box; FIG. 4 represents the box of FIG. 3 after complete separation between the two parts of the box; - Figure 5 represents the particular part of the box in Figure 4, this useful part constituting a presentation device for the products initially contained in the box; - Figure 6 is an illustration of the cut and perforated cardboard plate as it appears before mounting the box of Figures 1 to 5; - Figure 7 is a view similar to that of Figure 6 for the production of a box of a second type;

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  - Figures 8A and 8B represent cn perspective, respectively from its front face and from its rear face, a box with hinge before the separation between the cover and the rest of the box; - Figures 8C and 8D are transparent views corresponding respectively to Figures 8A and 8B; FIG. 9 is a view identical to that of FIG. 8A showing the start of the separation between the cover and the rest of the box; - Figure 10 shows the box with hinge of Figure 9 after separation between the cover and the rest of the box, the cover being held on the box by a hinge formed by a portion of the cardboard wall and a section of the longitudinal element; - Figure 11 shows a device for the separation of two adjoining parts of a cardboard wall of an article, this device making it possible to produce a reinforced handle; - Figure 12 shows the device of Figure 11 during the separation between the two adjoining parts; ct, Figure 13 shows the reinforced handle formed after separation between the two adjoining parts thanks to the device according to the

present invention.

  If we refer to Figure 1, a box 20 for receiving products has a bottom 22, four side walls 24a to 24d and a top wall 26 consisting of four flaps 26a to 26d. This box 20 serves as a packaging for products which are stacked inside box 20, which serves to protect and group these products during storage and / or transport of these products. This box can therefore have, on its outer surface, inscriptions or drawings directly printed on the initial cardboard plate in order to identify the bottom of the top of the box and to know all the useful information concerning the products.

contained in this case.

  In addition to the packaging of the products contained in the box 20, the box 20 is intended to serve as a product presentation device, directly on the shelf of the store. To this end, the box 20 is provided with a separation device. This separation device is made up of a

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  longitudinal reinforcing and guiding element in the form of a strip 30, a line of pre-cuts 32 and gripping means 34 making it possible to separate the body 20 between a lower part 20a intended to serve as a presentation device and an upper part O20b intended to be discarded after separation. The strip 30 is a plastic strip glued inside the box 20, on the entire periphery thereof and at a constant height H1

from the bottom 22 of the box.

  The pre-cut line 32 also follows the peripheral contour of the box 20 at a constant height H2 from the bottom of the box 20. According to a characteristic of the present invention, the pre-cut line 32 is located at a level such that it shares the strip 30 in two portions 36 and 38. In FIG. 1, the line of pre-cuts 32 is situated substantially in the middle of the width of the strip 30 but it is possible to conceive of a different arrangement provided that the line of pre-cuts 32 remains between

  the two lateral edges of the strip 30.

  According to another particular characteristic of the present invention, the pre-cut line 32 is composed of perforations 40 passing through both the strip 30 and the side walls 24a to 24d of the body 20. The pre-cut line 32 divides the strip 30 into one guide portion 36 of the separation and into a reinforcing portion 38 whose role will be

  explained in more detail below.

  The gripping means 34 consist of an area of the front side wall 24a bounded by a pre-cut opening line 42 continuously crossing said front side wall in a shape cn T, the leg of the T 42a crossing at right angles to the pre-cut line 32 and line 42b of the T constituting the upper part of this T being parallel to the line of

  pre-cut 32 and located in the upper part 20b of the body 20.

  The pre-cut line 32 materializes the separation line at the level of which the lower and upper parts 20a and 20b of the body are separable. This pre-cut line 32 having a rectangular shape corresponding to the periphery of the body 20, there is obtained, according to this pre-cut line 32, a lower part 20a having an identical height H2 over its entire periphery. In order to better distinguish the front face of the future

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  presentation device, the front side wall 24a is provided with a complementary pre-cut line 44 cn U-shape, the base of the U being parallel to the line of pre-cuts 32 ct located on the side of the low part 20a of the box and the branches of the U being intersecting with this line of precuts 32. According to an embodiment of the body 20 of FIG. 1, H2 is equal to 5 cm, the width of the strip 30 is 12 mm and the line of precuts 32 is consisting of perforations 40 cn form of periodic slots with a length of 2.5 mm, the difference between two perforations being

also 2.5 mm.

  We can imagine quite other dimensions. Preferably, the strip 30 has a width greater than or equal to 10 mm, and the perforations 40 of the pre-cut line 32 have a length

less than or equal to 5 mm.

  We will now describe, in relation to FIGS. 2 to 5, the achievement of the separation between the low and high parts 20a, 20b of the

box 20.

  When the box 20 is rcfcrméc ct rcmplie of products (Figure 2), it is easy to identify the gripping means 34 for starting the opening of the box 20 by viewing the opening line 42. To be able to enter the zones 34, it suffices to exert a slight pressure on them so that they deviate from the front side wall 24a of the body 20. It is of course possible to provide other gripping systems as zones 34 for the opening of the box, for example a hole in the wall

from box 20.

  Then, as shown in figure 3, it is a question of pulling on the zones 34 to begin to open the box and to separate the bass parts.

  high 20a, 20b. It will be noted that the leg of the T 42a extends appreciably-

  up to the complementary pre-cut line 44 so that when the zones 34 are entered, the part of the front side wall 24a situated between the pre-cut line 32 and the complementary pre-cut line

  44 rcste solidairc des zoncs 34 ct is detached from the box 20.

  By removing a zone 34 from the front side wall 24a of the body, it is understood that the guide portion 36 of the strip 30, integral

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  gripping means 34, also deviates from the body 20 on either side of the pre-cut line 32 and the free edge of this portion of

guide 36.

  In fact, thanks to the line of pre-cuts 32 crossing both the side walls 24 of the body and the strip 30, the bottom part 20a is very clearly cut intended to constitute a useful part, in this case a

  product presentation device.

  During this opening operation, it is understood that the reinforcement portion 38 which remains integral with the newly created free edge of the lower part 20a protects this edge by strengthening it so as to avoid degradation.

  from this edge by a phenomenon of tearing off the cardboard located between two perfo-

rations 40.

  Thus, it is understood that the strip 3 () allows, thanks to the guide portion 36, to cut cleanly by shearing the edge of the part

low 20a.

  To finish detaching the lower part 20a from the body 20, it suffices to continue pulling on at least one of the two zones 34, more or less following the peripheral contour of the body 20 in order to detach and completely separate the lower parts and high 20a, 20b of the body the portion of

  guide 36 of the strip 30 and its cardboard support.

  The main advantage of the separation device according to the present invention is that the separation is carried out between the lower part 20a and the upper part 20b by obtaining a free edge 46 of the lower part 20a completely

  regular and clean over the entire section comprising the reinforcement portion 38.

  Another particularly advantageous characteristic of the present invention is that this result is obtained regardless of the manner in which the gripping means 34 secured to the guide portion 36 are pulled. In fact, this separation can be carried out very fast by pulling on the areas 34 in any direction relative to the side walls 24 of the body 20 (or very slowly taking care to shoot at least one of the areas 34 following the direction of the line of

pre-cuts 32.

  When the guide portion 36 has been completely removed, it then suffices to release the upper part 20b (FIG. 4). A device is thus obtained

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  presentation 20a supporting the cnscmblc of the products initially contained in the box 20 (the outline of the products is represented by mixed lines in FIG. 5) and placing the presentation device 20a on the shelf intended to receive the products. Thanks to the separation device according to the present invention, a presentation device is obtained with an appearance edge.

  smooth, clean and regular, quickly obtained from the initial packaging.

  From the foregoing description of the embodiment of a

  packing box, it is understood that the strip 30 constitutes a longitudinal reinforcing element and guiding at least partially delimiting the dividing line, this strip 30 being continuous, placed on either side of this dividing line having its surface facing the side walls 24 of the cardboard box 20, playing the role of support, substantially

fully connected to this support.

  If the strip 30 and the pre-cut line 32 can be respectively arranged and produced according to a line having a non-rectilinear shape, the complementary pre-cut line 44 is then absent

  and replaced by a section of the pre-cut line 32.

  Instead of a cardboard box, it is understood that the separation device according to the present invention can be included in other types of articles such as packaging, plate, etc. These articles can be produced in a cardboard support. (flat or corrugated) or any other material that can be sheared without significant deformation: plastic, synthetic,

agglomerated, composite ...

  The separation device according to the present invention applies to a support produced in any type of corrugated cardboard, in particular double-sided corrugated cardboard or double-sided corrugated cardboard, corrugated cardboard.

  double face being used in a preferential way.

  The strip 30 constituting the longitudinal element of reinforcement and guide can be replaced by other elements such as a cord, a covering or a layer made of a material having a resistance to shearing and a resistance to tearing off at the top the shear strength of the support. In the context of the embodiment which has just been described, the strip 30 constitutes an element which is continuous and which closes on itself, but it is understood that this element may not be

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  endless and can consist of an element with two free ends so as to be able to physically separate the two adjoining parts from one another without there being cutting and complete separation of the article in two

  pieces that can be detached from each other.

  The pre-cut line 32 is preferably substantially in the middle of the width of the longitudinal reinforcing and guiding element, but this element may have a non-constant width, and even extend over

  the entire wall of the article which supports the separation device.

  The perforations 40 of the pre-cut line 32 are in the form of a longitudinal slit parallel to the pre-cut line 32, but it is entirely conceivable that these perforations 40 have other shapes provided that they pass through both the longitudinal element of reinforcement and guiding and the

support 24.

  It is understood that in the case of the box of Figures 1 to 5, the gripping means comprise, in addition to a section of the guide portion 36 of the strip 30, at least one area 34 of the wall of the article at least partially superimposed on at least part of said guide portion 36 of the element, this zone 34 being delimited by a section of the pre-cut line 32 and by an opening line 42 pre-cut

crossing the wall of the article.

  The areas 34 of the front side wall 24a constituting gripping means can be replaced by other types of gripping means: at least one end section of the longitudinal element projecting from the wall comprising the separation device, a handle fixed to the guide portion 36 of the longitudinal element of

reinforcement and guide, ...

  Preferably, the longitudinal reinforcing and guiding element is a strip 30, one of the surfaces of which is entirely fixed to the wall of the cardboard article and the strip 30 consists mainly of

  plastic or kraft paper.

  The longitudinal guide and reinforcement element can also

  consist of a bead of glue.

  Referring now to Figure 6 o the box 20 is shown before mounting, after cutting a cardboard plate 20 '. The 11il 2767788 bottom 22 of the body is composed of flaps 22a to 22d, the upper wall 26 is composed of the flaps 26a to 26d, the side walls 24a to 24d being aligned longitudinally in the direction X of advance and cutting of the

  cardboard which is preferably perpendicular to the corrugation of the corrugated cardboard.

  The side wall 24c or rear wall is adjacent to the side wall 24d and to a fixing flap 24e, one of the surfaces of which will be entirely fixed to the side wall 24b so that the body 20 constitutes

a rectangular parallelepiped.

  In order to be able to fully assemble the box 20, provision is made for a cutout to be made on the adjacent line separating between them the flaps 26a to 26d and the flaps 22a to 22d. In order to be able to fold the box, it is provided that the lines 48 separating between them the side walls 24a to 24d and each side wall 24a to 24d with one of the flaps 26a to 26d and 22a to 22d carry a groove or a creasing ( dotted lines). The longitudinal direction X corresponds to the direction of advance of the cardboard plate in the machine for making corrugated cardboard. This direction X is parallel to the longitudinal direction of the plate intended to form the body 20 and to the free edges of the flaps 22a to 22d and 26a to 26d. The direction of passage in the processing material corresponds to the Y axis and the direction of the grooves of the

  corrugated cardboard is indicated by the reference 50.

  In the case of Figure 6, the pre-cut line 32 and the strip 30 are arranged in the direction X but it is understood that these elements can be placed in another direction. The pre-cut line 32 can be parallel, perpendicular or have any other direction relative to the direction of undulation of the corrugated cardboard. Preferably, the wall of the article is made of cardboard and has a temperature higher than 40 C when said longitudinal reinforcing and guiding element o the strip 30 is placed on the wall of the cardboard article and said element is pierced. 30 and said article wall for making the perforations 40 of the pre-cut line 32 immediately after having disposed said longitudinal reinforcing and guiding element. In this way, it is understood that by coming to glue "hot" the strip 30, one achieves better adhesion between the strip 30 and its

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  cardboard support. Since the perforations 40 are also made "hot", it is understood that it is easier for the cutting tool to penetrate through the material of the strip 30 and of the cardboard support so that

  40 clear through holes that cut the material without tearing it off.

  Preferably, the element is a strip 30 on which pressure is exerted while it is placed on said cardboard wall of the article so that when this strip 30 is placed, which can be a heat-sealable strip, on the hot cardboard, the entire surface of this strip 30 automatically adheres to the cardboard. Pressure can be exerted by the

  roll on which the strip is wound.

  It is understood that to manufacture the separation device according to the present invention, it is not necessary to use specific tools since coming to glue a strip or make a line of pre-cuts made up of through perforations are usually operations

  produced separately in the cardboard sector.

  The strip 30 of FIG. 6 has a width of 12 mm and the line of pre-cuts 32 consists of perforations in the form of a slot with a length of 2.5 mm spaced apart from each other by 2.5 mm. The complementary pre-cut line 44 is made up of spaced 24 mm slots

  between them by 3 mm long attachment zones.

  Thanks to the separation device according to the present invention, it is also possible to separate into two parts of a box along a non-rectilinear separation line. In FIG. 7, one can visualize an exemplary embodiment where the plate 120 comprises four side walls 124a to 124d on which a line of precuts 132 is composed of rectilinear longitudinal sections 132a and 132b, respectively straddling the side wall 124d and the side walls 124b and 124c and a U-shaped section. This U-shaped section has a straight and longitudinal base 132c extending at least from one end to the other of the front side wall 124a and connected to the rectilinear sections 132b and 132a by two rectilinear sections 132d and 132e constituting the branches of the U and arranged in a transverse direction perpendicular to the axis X of cutting and advancing the carton. The pre-cut line 132 comprises, in the transition zones between the rectilinear sections 132a to 132e, an arcuate shape of

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  circle so that the display obtained from this plate 120 and formed by the lower part 120a has a very indented shape with an outline

  having rounded transition zones between the straight sections.

  A strip 130 analogous to strip 30 is disposed along the same contour as the pre-cut line 132. It is understood that it is possible to give the pre-cut line 132 shapes comprising undulations so that the presentation device, obtained after separation of the lower part 120a from the upper part 120b of the initial body 120, has a geometric outline

original with a smooth edge.

  Reference will now be made to FIGS. 8A to 10 which relate to a box with hinge. This box 220 consists of a bottom 222, four side walls 224a to 224d ct of a top wall 226. A strip 230 extends, inside the box 220, on the four side walls 224a to 224d along a rectangular contour parallel to the bottom 222 and to the upper wall 226. This strip 230 can be continuous or else discontinuous and made up of several pieces which entirely cover the periphery of the box 220. This strip 230 and three of the four side walls are provided two pre-cut lines 232 and 233, preferably parallel to each other, delimiting between them the guide portion 236 and the gripping means. The two portions of the strip 230 located on either side of said guide portion 236, that is to say between one of the pre-cut lines 232 and 233 and one of the lateral edges of the strip 230, forming two portions dc reinforcement 238 from the edge of the two parts 220a and 220b

  from the wall of the box 220 which constitutes an article.

  The two pre-cut lines 232 ct 233 are interconnected by at least one opening line 242 in the form of a transverse slot and by two end of opening lines 243 in the form of a transverse fentc located at the

  ends of the pre-cut lines 232 and 233.

  In the example illustrated in FIGS. XA to 8D, the precut lines 232 and 233 extend over the entire width of the side walls 224a, 224b, 224d and over a small portion of the width of the rear side wall 224c, in the zones adjacent to the side walls 224b and 224d. The opening line 242 is placed in the middle of the section of the strip 230

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  extending on the front side wall 224a and the two end of opening lines 243 connect between keys the two ends of the pre-cut lines 232 and 233 near the edges of the box 220 which connect the

  side wall 224c to side walls 224c ct 224d.

  Referring to FIG. 9, in order to open the box 220, each section of the guide portion 236 adjoining the opening line 242 is grasped by pulling this section of the guide portion up to 'to one of the end of opening lines 243 so as to entirely withdraw the guide portion 236 of the strip 230 situated along the pre-cut lines 232 and 233 and between the two lines of end of opening 243. The box 220 is then separated cn two partics 220a and 220b, thanks to the opening

  formed on the side walls 224a, 224b and 224d.

  This way, as can be seen in FIG. 10, is obtained a box 220 which can open and close, the section 230c of the strip 230 located on the rear side wall 224c constituting a hinge for the box thus formed. The free edge of the two parts 220a ct 220b extending over the side walls 224a, 224b and 224d being reinforced by the reinforcement portions 238 which ensured, during the separation, a safe and easy cutting by leaving a smooth edge 246 ct regular both on the lid

  220b and on the housing body 220a.

  Reference will now be made to FIGS. 11 to 13 which illustrate a separation device allowing to form a reinforced handle at the level of a wall 324, by addition to the level of one of the side walls of a box or of a packaging 320 in corrugated cardboard. The face of the wall 324 visible in FIGS. 11 to 13 can constitute the inner face or the outer face of a box. A strip 330 is arranged in a U-shape, the base of the U being turned towards the top of the box. In this way, the strip 330 constituting said longitudinal element has two free ends 331. A line of pre-cuts 332 in the form of U follows the same contour as the strip 330, sensiblcment in the middle of this strip 330. The line of pre-cuts 332 shares the bandc 33 (0) in a guide portion 336, in the zone of band 33 (0) facing the inside of the U and in a

  reinforcement portion 338 forming the outer contour of the U of the bandc 330.

  At least one of the free ends 331 of the guide portion 336 is

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  secured to gripping means such as a tongue 334 which can be

  consisting of a piece of the strip 330 which is not integral with the wall 324.

  To form the handle, it suffices to pull on the tongue 334 to spread and detach the guide portion 336 from the strip 330 and at least the area 324a of the wall 324 fixed to this guide portion 336 (FIG. 12). When the guide portion 336 has been completely removed from the wall 324 (FIG. 13) the opening 341 thus formed is intended to allow the passage of retaining means such as a hook or a hand for the manipulation of the body comprising the wall 324. A reinforced handle is thus formed since the reinforcement portion 338 increases the mechanical resistance of the edge of the wall 324 delimiting the opening 341 in the zone

  subject to strain constraints.

  To allow an enlargement of the opening 341, provision may be made, along a line 345, connecting the two ends of the pre-cut line 332, to make a groove or a crease so as to fold the area 320b of the wall 324 delimited by the pre-cut line 332 and the line 345, this zone 320b not having left at the same time as the portion

guide 336.

  It is understood that many other applications not described

  here can be performed with the separation device according to the invention.

  Thus, instead of making a handle, if the pre-cut line and the strip are continuous, it is possible to make other types of opening within a wall or else release flat parts of any shape from a plate. , these parts constituting the elements of a kit to form any object

three-dimensional.

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Claims (22)

  1. Device for separating two adjoining parts (20a, b; 120a, 120b; 220a, '220b; 320a, 320b) from the wall (24; 124; 224; 324) of an article (20; 120; 220 320) along a dividing line, at least one of the parts constituting a useful part (20a; 220a, 220b; 120a; 320a), characterized in that it comprises: - a longitudinal element dc reinforcement and guide (30 ; 130; 230; 330) integral with the wall at least on the partition line, this element having a shear resistance and a tear resistance greater than the shear resistance of said wall (24; 12 4; 2_24; 324), - at least one line of pre-cuts (32; 132; 232, 233; 332) parallel to said dividing line and constituted by perforations (40) crossing said wall (24; 124; 224; 324) of said article and said element (30; 130; 230; 330) so as to divide said element into a portion of guide (36; 236; 336) of the partition and into a portion of comfort (38; 238; 3 38) from the edge of at least said useful part (20a; 220a, 220b; 120a; 320a) dc the wall, and - gripping means (34; 334) integral with said portion of guiding said element.   2. Device according to rcvcndication I, characterized cn cc quc said   wall of said article is made of corrugated cardboard.   3. Device according to any one of rcvcndications 1 and 2, characterized in that lcdit element (30; 130; 230; 330) is continuous and is close in on itself.   4. Device according to any one of claims I to 3,   characterized cn cc quc laditc lignc dc prescuts cst obviously with milicu   the width of said element (3 (0; 130; 230; 330).   5. Device according to any of claims 1 to 4,   characterized in that said perforations (40) of said line of   pre-cuts (32; 132; 232; 332) are periodic.   6. Device according to any one of rcvcndications 1 to 5, characterized in that said perforations (40)) of laditc line   pre-cuts (32; 132; 232; 332) are cn formc dc fcntes.   7. Device according to any one of revcndications I to 6, characterized in that said perforations (40) of laditc line 17 2767788   precuts (32; 132; 232, 233; 332) have a length substantially equal to the distance separating said perforations (40) from one another. 8. Device according to claim 6, characterized in that said perforations (40) of said pre-cut line (32; 132; 232,   233; 332) have a length less than or equal to 5 mm.   9. Device according to any one of claims   above, characterized in that said element is a strip (30; 130; 230; 330) one of the surfaces of which is entirely fixed to said wall of said cardboard item.   10. Device according to claim 9, characterized in that   said strip is mainly made of plastic.   11. Device according to claim 9, characterized in that   said strip is mainly made of kraft paper.   12. Device according to claim 9, characterized in that   said strip has a width greater than or equal to 10 mm.   13. Device according to any one of claims   above, characterized in that said element is a bead of adhesive.   14. Device according to any one of the claims   above, characterized in that said element (30; 130; 230; 330) has two free ends and in that said gripping means (34; 334) are integral with a free end of said guide portion said element.   15. Device according to any one of claims   previous, characterized in that said gripping means (34) further comprises an area of said wall of the article at least partially superimposed on at least a portion of said guide portion (36) of said element (30) and delimited by a section of the pre-cut line (32) and by a pre-cut opening line (42) crossing said wall of said article.   16. Corrugated cardboard box (20) comprising at least one   device according to any one of the preceding claims,   characterized in that said element (30) is arranged continuously on the four side walls (24) of said box, said dividing line sharing the 18 2767788   body in a first part (20a) and in a second part (20b), in that said gripping means (34) are arranged at said second part (20b) so that at least said first part (20a) constitutes   a useful part after separation between said parts (20a, 20h).   17. Box according to claim 16, characterized in that said device comprises two pre-cut lines (232, 233) delimiting between them said guide portion (236) and said gripping means, the two portions of the element located on the side and other of said guide portion forming reinforcing portions (238) of the edge of the two parts   (220a, 220b) dc the wall of said article.   18. Box according to any one of claims 16 and 17,   characterized in that said element is a straight strip (30) arranged   on the inner surface of the side walls (24a to 24d) of said box (20).   19. Box according to any one of claims 16 to 18,   characterized in that said useful part (20a) comprises the bottom (22) of the box (20) so that, after separation between said parts (20a, 20b), said useful part (20a) serves as a presentation device of products contained in said case.   20. A method of manufacturing a separation device, characterized in that it comprises the following steps: - an article (20; 120; 220; 320) having a wall (24; 124; 224; 324) is provided comprising two adjoining parts (20a, 20b; 120a, 120b; 220a, 220b; 320a, 320b) intended to be separated along a dividing line, at least one of the parts constituting a useful part, - one has on said dividing line a longitudinal reinforcing and guiding element (30; 130; 230; 330) at least partially delimiting said dividing line, this element having a shear strength and a tear resistance greater than the shear resistance of said wall ( 24; 124; 224; 324), - the said element (30; 130; 230; 330) is fixed to said wall (24; 124; 224; 324) of said article at least on said dividing line, - one realizes perforations (40) passing through said element (30; 130; 230; 330) and said wall (24; 124; 224; 324) of said article along at least one pre-cut line parallel to said dividing line so as to share 19 2767788   said element (30; 130; 230; 330) in a guide portion (36; 236; 336) of the separation and in a reinforcement portion (38; 238; 338) of the edge of at least said useful part of the wall, and - gripping means made integral with said guide portion (36; 236; 336) of said element are produced. 21. The manufacturing method according to claim 20, characterized in that said wall (24) of said article is made of cardboard and has a temperature above 40 C when said element (30) is disposed on said wall of said article cn cardboard and in this that we pierce said element and said   wall of said article immediately after placing said element.   22. Manufacturing process according to any one of the claims.   tions 20 and 21, characterized in that said element (30) is a strip on which pressure is exerted while it is placed on said wall (24) of the said article.