FR2856387A1 - Cardboard flank for making container, has walls integrated with junction straps so that each strap is integral with neighboring strap, where neighboring straps are maintained by fixing units after straightening walls - Google Patents

Abstract

The flank has a rectangular central part with a base (101), and four adjacent walls (106-109) at the base. Each of the walls is integrated with two junction straps and is straightened with respect to the base to constitute a container body. Each strap is integral with the neighbor strap by a folded line so that the neighboring straps are applied one against the other and maintained by paper liners after straightening the walls.

Description

W 2856387

  Containing in a single blank and with isothermal walls The transport of certain products requires particular conditions, particularly temperature, in order to preserve their quality.

  These products can be perishable goods such as fruits and vegetables, meat, but also pharmaceutical materials such as drugs, vaccines, liquid samples, blood bags or infusion fluid, etc. When these products are transported in very large quantities, it is often advantageous to provide a specially adapted means of transport such as refrigerated trucks whose container is equipped with an air conditioner and sensors for maintaining a chosen temperature.

  The advantage is a constant maintenance of the temperature, but the disadvantages are numerous. Indeed, this supposes an important organization between the place of dispatch and the place of reception, a specially adapted and therefore expensive truck, and handling charges. But above all, it means that as soon as the goods are unloaded from the truck they are no longer thermo regulated.

  Another solution is to transport the goods no longer in a specially adapted vehicle but in refrigerated containers loaded on a conventional vehicle. Again, this assumes an important organization and the acquisition of expensive containers.

  These solutions are not suitable for short-lived products if the transport has to be fast and over a long distance.

  Air transport is preferred, the products being enclosed in refrigerated containers.

  When products are transported in small quantities, it is usually the packaging that is adapted to be insulating.

  For example, cold boxes, which are rigid, thick-walled, insulating plastic boxes that are closed by an insulating cover, are known. The products to be transported in the cooler are placed with generally an ice-plate type cold accumulator, and sealed with the lid.

  The disadvantages are many: the cooler itself is heavy which can generate significant costs if you want to send a lot by 5 plane for example. In addition, the cooler is relatively expensive because it is designed on the one hand to be insulating, and secondly to serve several times which also causes a return charge. In addition, when transporting medical samples for example, it is especially necessary to charter a carrier guaranteeing the non-opening of the cooler that can not be sealed.

  Another known solution is a cardboard blank, corrugated or not, which is added, after it has been shaped to form a standard container, insulating interior liners.

  This solution has the advantage of being economical thanks to the materials used and thanks to its use that does not require a special carrier, the boxes being able to be sealed and sent by the Post Office.

  Two examples can be cited: To maintain temperatures between two and eight degrees Celsius for twenty four hours (manufacturer's instructions), the insulating covering consists of two blanks eight millimeters thick composed of expanded polystyrene sheet sandwiched between two sheets of aluminum, both blanks are U-folded and installed in the cardboard box so that all the walls of the box are covered by an insulating thickness A For temperature maintenance up to At twenty degrees Celsius for twenty-four hours (manufacturer's instructions), the insulating covering consists of 40-mm thick high-density polyurethane foam plates, each plate covering one side of the cardboard box.

  In addition to the lost space occupied by the insulating cladding (in particular that consisting of high-density polyurethane foam plates), these two systems have a major disadvantage: the presence of thermal leaks at the junction of the plates.

  Indeed, since the covering consists of several independent plates, there are "thermal bridges" between the plates, that is to say that the cold can not only escape through the spaces between the plates, but it can also escape through the edge of the insulating plates.

  This explains the significant heat losses of these two systems.

  Another solution is to produce a package consisting of 10 lightweight panels consisting of an inner layer of hard polyurethane foam covered on both sides with a metallized polyester sheet.

  If this structure has a great performance in thermal insulation, it is practical because the containers it constitutes are very easily "marked" by the blows they can receive during transport. Indeed, the outer metallized polyester sheet having no mechanical strength, the slightest shock is transmitted to the polyurethane foam which crushes. In addition to the deterioration of aspects, the container wears quickly since each crushing of the foam corresponds to a thinned zone favoring thermal exchanges.

  The present invention overcomes the drawbacks of known solutions and proposes a novel solution according to which a corrugated cardboard blank is secured to an insulating material and has a particular cutout making it possible to constitute a secure and hermetic container having no thermal bridge.

  To this end, the subject of the invention is a blank made of cardboard or similar material cut, grooved and possibly printed, which has all the means for constituting a container flat, namely on the one hand a flat polygonal base and walls adjacent to the base to be subsequently straightened with respect to said base to form a container body by volume, characterized in that it consists of at least one sheet of corrugated cardboard and at least one sheet 30 of a thermally insulating material or a thermally insulating structure, that each wall adjacent to the base is secured to two junction tabs, each of which is secured to the adjoining junction tab by a folding line so that after straightening the walls, two adjacent junction tabs are applied against each other and thus maintained by fastening means.

  Other features of the invention will be set forth in the detailed description hereinafter made with reference to the accompanying drawing. Of course, the description and the drawing are given only by way of indicative and nonlimiting example.

  Figure 1 is a sectional view of a blank according to the invention showing its isothermal structure in several thicknesses.

  Figure 2 is a sectional view of an alternative embodiment of a blank according to the invention.

  Figure 3 is a schematic plan view of a blank according to the invention, intended to form an isothermal container with a closure panel secured to three brackets.

  Figure 4 is a schematic perspective view of the blank of Figure 3.

  FIG. 5 is a schematic perspective view of an isothermal container being assembled, originating from the partial folding of the blank of FIG. 4.

  Figure 6 is a schematic perspective view of an isothermal container from an intermediate fold of the blank of Figure 4 and showing the interior of the container body, with the flaps and lid not closed.

  Figure 7 is a schematic perspective view of the box of Figure 6, a flap is closed.

  Figures 8 to 11 are schematic perspective views of the box of Figure 7 in the following closing phases and more specifically: Figure 8 shows the preparation of the closure means of the box; Figure 9 shows the rectified closure panel ready to be applied to the flaps; Figure 10 shows the closed box on its upper face and its lateral faces, but not on its front face; Figure 11 shows the box after complete closure.

  Figure 12 is a schematic longitudinal sectional view of the blank of Figure 10.

  Figure 13 is a schematic cross-sectional view of the blank of Figure 11.

  FIGS. 14 to 25 are diagrammatic views of an alternative embodiment of the invention and more specifically: FIG. 14 is a diagrammatic plan view of a blank according to the invention, intended to constitute an isothermal container with a doubling panel and a closure panel secured to two brackets.

  FIG. 15 is a schematic perspective view of the blank of FIG. 14.

  FIG. 16 is a schematic perspective view of an isothermal container being assembled from the partial folding of the blank of FIG. 15.

  Fig. 17 is a schematic perspective view of an isothermal container from an intermediate fold of the blank of Fig. 15 and showing the interior of the container body, the flaps, the liner panel and the closure panel. not being closed.

  Figure 18 is a schematic perspective view of the box of Figure 17 with a flap is closed.

  Figures 19 to 23 are schematic perspective views of the box of Figure 18 in the following closing phases and more specifically: Figure 19 is a schematic perspective view of the box of Figure 18 showing that the flaps form a first isothermal layer in line with the base; Figure 20 shows the preparation of the closure means of the box; Figure 21 shows that the flaps form a support for the doubling panel; Figure 22 shows the rectified closure panel ready to be applied to the flaps; Figure 23 shows the box after complete closure.

  Figure 24 is a schematic longitudinal sectional view of the blank of Figure 23.

  Figure 25 is a schematic cross-sectional view of the blank of Figure 23.

  Figure 26 is a schematic view of another alternative embodiment of the invention.

  Referring to Figure 1, we see the internal structure of a complex material component of a blank according to the invention.

  This blank is constituted here, from the bottom upwards in the figure, of a thickness 10 e, so-called "thermo insulating sheet" made of a thermo-insulating complex material composed of a metallized polyester sheet 1, a foam layer of hard polyurethane 2 and covered with a sheet 3 of metallized polyester on which is laminated a thickness of corrugated cardboard 4, called "cardboard sheet", composed of a corrugated sheet of paper 4a on which is glued a sheet of flat paper 4b.

  The thickness e is generally between 3.5 and 6 millimeters, but it can be increased to reinforce the insulating power of this layer.

  The corrugated cardboard sheet 4a can be laminated directly onto the sheet 2, but an additional sheet of paper, identical to the sheet 4b and interposed between the sheet 4b and the metallized polyester sheet 2, can be provided. a larger bonding area between the cardboard sheet and the thermally insulating sheet but increases the cost of the blank.

  As shown in Figure 2, one can provide, in addition, one or more layers of corrugated or compact cardboard to increase the rigidity of the assembly, its mechanical strength and thermal.

  Similarly, one can provide several thermo insulating sheets, that is to say a succession of metallized polyester sheet / hard polyurethane foam / metallized polyester sheet / hard polyurethane foam / metallized polyester sheet, etc. The use of corrugated cardboard in addition to the foam protects the latter by absorbing the strokes thanks to the elasticity of the flutes, provides mechanical strength to the assembly and improves the insulating capacity of the foam since the air 7 2856387 contained between the splines and trapped thanks to the folds between the faces plays the role of an additional insulator.

  The invention lends itself to corrugated corrugated corrugated more or less important, including those known as "micro flutes">.

  Referring to Figure 3 there is shown a blank according to the invention, that is to say a sheet of cardboard or similar material laminated to a thermally insulating sheet, the assembly being cut and grooved to be brought into volume by folding and thus maintained by means of long-acting adhesive to form a container.

  The invention may therefore be either flat in the form of a blank, or in volume in the form of a container and it may be empty or lined with objects, in whole or in part.

  With reference to the finished container, the blank is shown on its inner face side, i.e. the visible faces in FIG. 3 consist of the thermally insulating material which is inside the closed container. Conversely, the non-visible faces constitute the outer side of the closed container.

  The blank 100 of FIGS. 3 and 4 has a rectangular central portion constituting a base 101 for articles to be packaged and delimited by four folding lines 102, 103, 104 and 105 perpendicular in pairs and formed by a creasing to straighten out. from the plane of the base 101 four adjacent walls 106, 107, 108 and 109.

  With reference to the finished container, the rectangular panels 106 and 107 constitute side walls and the rectangular panels 108 and 109 constitute transverse walls.

  Each adjacent wall 106, 107, 108 and 109 at the base 101 is integral with two junction lugs 111-112, 113-114, 115-116, 117-118, these connecting lugs and the adjacent walls 106, 107, 108 and 109 at the base 101 being connected by the fold lines 102, 103, 104, 105 according to which said connecting tabs can be folded.

  The joining lug 111 belonging to the side wall 106 and the connecting lug 118 belonging to the neighboring transverse wall 109 are integral with one another by a fold line 121 forming an angle with the fold line 104 equal to half of the angle formed by the fold lines 104 and 102 between them.

  The joining lug 112 belonging to the side wall 106 and the connecting lug 115 belonging to the neighboring transverse wall 108 are integral with one another by a fold line 122 forming an angle with the fold line 105 equal to at half the angle formed by the fold lines 105 and 102 therebetween.

  The joining lug 113 belonging to the side wall 107 and the joining lug 116 belonging to the neighboring transverse wall 108 are integral with one another by a fold line 123 forming an angle with the fold line 105 equal to at half the angle formed by the fold lines 105 and 103 between them.

  The joining lug 114 belonging to the side wall 107 and the joining lug 117 belonging to the neighboring transverse wall 109 are integral with one another by a fold line 124 forming an angle with the fold line 104 equal to half of the angle formed by the fold lines 104 and 103 between them. The joining tabs 111, 112, 113 and 114 respectively have on their outer side a strip of long-lasting adhesive (shown in dashed lines in FIGS. 3 and 4) covered with a strip of protective paper 131, 132, 133, 134 says "liner". It will be explained later that this adhesive constitutes during assembly of the container a means for fixing junction lugs 20 adjacent to each other.

  In this exemplary embodiment of the invention, for each adjacent wall 106, 107, 108 and 109 at the base 101, the long-acting adhesive A is disposed on a connecting tab, so that on two legs of adjacent junctions (111-118, 112-115, 113-116 and 114-117), only one (111, 112, 113 and 114) is covered with adhesive.

  The two side walls 106 and 107 are each integral with extensions 136, 137 respectively, called "lateral extensions" because they are integral with the side walls 106 and 107. Lateral extensions 136, 137 and side walls 106, 107 are separated by a fold line 146, 147 parallel to the fold lines 102 and 103.

  The lateral extensions 136 and 137 are each extended transversely by two closure tabs 136a 136b, 137a and 137b connected to the lateral extensions 136 and 137 by the folding lines 104 and 105.

  The transverse wall 109 is extended transversely by a rectangular panel 150, called a "closure panel" with reference to the closed container, and separated from it by a fold line 151 parallel to the fold line 104.

  The closure panel 150 has the same dimensions as the base 101 and has on each of its other three sides a fixing lug 152, 153, 154 which is secured to it along the entire length of the side by folding lines respectively 102, 10 103, 155. The width of these tabs is less than the height h of the adjacent walls 106, 107, 108 and 109, height h designated with reference to the container set volume.

  In the example described, the fixing tabs 152, 153 and 154 each have a strip of long-acting adhesive covered by a strip of protective paper 160, 161, 162. Of course, other fastening means may be provided instead of or in addition to these strips of adhesive.

  A tear strip 163, located between the transverse wall 109 and the strips of protective paper 160 and 162, is pre-cut perpendicularly to the fold lines 102 and 103 and extends right through the blank, that is to say ie it starts from the outer edge of the bracket 152, passes through the closure panel 150 and opens on the outer edge of the bracket 154.

  Figure 5 shows the blank 100 during the first stage of the shaping of the container. One of the adjacent walls 106, 107, 108, 109 is tilted towards the base 101 while taking care to push the connecting tabs that are directly integral with it to the base 101. Because the connecting tabs of two 25 consecutive adjacent walls are secured by a fold line, the tilting to the base 101 of the connecting lug of an adjacent wall causes the tilting towards the base 101 of the other adjacent wall which is integral therewith. In other words, when two junction lugs are brought towards one another by pinching above the base, this results in the uprighting of the adjacent integral walls 30 of the junction lugs thus manipulated. Therefore, the holding by fixing means (here of the long-acting adhesive A), in this position, junction tabs applied against each other results in maintaining in the upright position of the walls adjacent to the base. 101 (long-acting adhesive must be placed on at least two non-adjacent junction lugs).

  For this, the protective strips 131, 132, 133, 134 are removed to reveal the long-acting adhesive A, and then the integral joining tabs 111-118, 112- are applied against each other by clamping. 115, 113-116 and 114-117 in order to stick them together. We then find ourselves with the container of Figure 6 in which we can see the side walls 106, 107 and the transverse walls 108, 109 rectified perpendicularly to the base 101, this assembly forming what is called the "body" container.

  The fact that the blank is in one piece, that is to say that the adjacent walls 106, 107, 108, 109, the junction lugs 111, 112, 113, 114, 115, 116, 117, 118 and the base 101 are all connected to each other by fold lines allows continuity, integrity and uniformity of the body which then has no cut, no discontinuity between its faces thus allowing to present no output and no possible entry in the air, that is to say no "thermal bridge." Indeed, if two adjacent walls were separated from each other by a cut of the blank, the junction between these two adjacent walls would be by overlapping an extension of one on the other, revealing on the outside 20 the cutting edge of the covering wall.There would then be heat exchange between the inside and the outside of the container by the Thanks to the blank 101 according to the invention, the body of the container does not it does not appear any cutting slice on the outside, thus prohibiting heat exchange.

  Inside this body, it can be seen that the connecting tabs 11125 118, 112-115, 113-116 and 114-117 extend from the four corners towards the center of the body without being applied against one or the other. other adjacent walls 106, 107, 108, 109.

  It is an equilibrium position imposed by the elasticity of the blank made of cardboard and polyurethane foam. When disposing of the objects inside the body, push the connecting tabs towards the edges. Due to the elasticity of the blank, they tend to return to their equilibrium position and thus plate against the objects, thereby helping to keep them in the container. When they are not 2856387 pressed against the adjacent walls 106, 107, 108, 109, the joining lugs 111118, 112-115, 113-116 and 114-117 also play the role of buttress and thus participate in the stiffening the body of the container.

  To the outside, the body has at its corners only the folds of the blank 5 101 located between the adjacent walls 106, 107, 108, 109 and the connecting tabs 111118, 112-115, 113-116 and 114-117, folds almost impervious to heat exchange.

  On the blank 101, along the fold line between two consecutive joining tabs 111-118, 112-115, 113-116 and 114-117, the corrugated board and the isothermal layer are stamped, but like this line Folding is found entirely inside the container set volume, to facilitate the folding and manufacture of the container can be provided to cut only the isothermal layer along the fold line between two junction tab, without fear of thermal exchanges between the inside and the outside of the container.

  Figure 7 shows the container being closed. When the body of the container has been filled with objects and with one or more cold accumulators for example, the closing tabs 136a, 136b, 137a and 137b are folded at right angles to the internal face of the lateral extensions 136 and 137, then these are brought in line with the base 101, so that they constitute flaps. In this position, the closing tabs 136a, 136b, 137a and 137b are located between the facing tab, respectively, 115, 118, 116 and 117, and the transverse wall 108, 109 which is integral therewith.

  Due to the elasticity of the blank 100, the closure tabs 136a, 136b, 137a and 137b tend to unfold and press against the transverse walls 108 and 109, thereby allowing the flaps 136 and 137 to be held in place. Plumb base 101.

  In the figure, the length 1 of the flaps 136 and 137 is substantially equal to half the length L of the base. This configuration makes it possible, on the one hand, to form an additional insulating layer between the inside of the container body and the closure panel 150, and on the other hand, to the edges of the flaps 136 and 137 to be substantially against each other, thus limiting thermal exchanges.

  If the lengths of the flaps 136 and 137 are equal, they will be at most equal to half the length of the base.

  However, the flaps may have a length different from each other.

  Finally, there can be no flap, in which case the closure panel 150 will be the sole insulating thickness between the inside and outside of the body of the container.

  Once the two lateral extensions 136 and 137 folded over the base 101 (FIG. 8), the protective strips 160, 161 and 162 are removed in order to expose the strips of adhesive A, the panel closing 150 above the lateral extensions 136 and 137 (Figure 9) and the fixing lugs 152, 153 and 154 are applied against the walls 106, 108 and 107 in order to seal the container. The three fastening lugs 152, 153 and 154 completely cover the other three edges of the container body, thus preventing heat exchange at the edge of the edge of the wall 108 and the edges edge of the flaps 136 and 137.

  Figure 12 shows the container of Figure 10 in cross-section. It can be seen that the adhesive A holds the fixing lugs 152 and 154 against the walls 106 and 107. The closure panel 150 is pressed against the flaps 136 and 137 so that the air contained in the container body does not It can escape directly only through the slices of the flaps 136, 137 and the space between these slices is laterally blocked by the folds between the fastening tabs 152, 154 bonded and the closure panel 150.

  Near the space between the flaps 136 and 137, there may be temperature exchanges between the container air and the closure panel 150, but there will be very little diffusion through the panel. In addition, temperature exchanges along the panel 150 (and in the panel 150 so that exchanges are made at the edges of the brackets 152 and 154) are also very small since the temperature gradient s It establishes over a very long distance approximately equal, viewed from one side (left or right), half the width of the closure panel 150 plus the width of the bracket 152-154.

  The air can not diffuse transversely as can be seen in FIG. 13. In fact, the air escaping through the space between the flaps 136 and 137 is blocked on one side by the fold. between the closure panel 150 and the wall 109, and on the other side by the adhesive A closing over its entire length the space between the fixing lug 153 and the wall 108.

  A variant of the invention is shown in FIGS. 14 to 25. The blank 200 of FIGS. 14 and 15 has the same container body structure 10 as the blank 100 of the preceding figures: a rectangular base 201 delimited by fold lines 202, 203, 204 and 205 perpendicular in pairs and formed by a creasing, integral base of adjacent walls 206, 207, 208 and 209 themselves integral with connecting tabs 211, 212, 213, 214, 215, 216, 217 and 218.

  The adjacent side walls 206 and 207 are integral with lateral extensions 236 and 237 by a fold line 246, 247, parallel to the fold lines 202 and 203.

  The lateral extensions 236 and 237 are each extended transversely by two closure tabs 236a, 236b, 237a and 237b connected to the lateral extensions 236 and 237 by the fold lines 204 and 205. The transverse wall 209 is extended by a closure panel 250 and

  separated from it by a fold line 251 parallel to the fold line 204. The closure panel 250 has the same dimensions as the base 201 and has on each of its two lateral sides a fastening lug 252 and 253 which is secured to it along the entire length of the side by fold lines respectively 102 and 103.

  A strip of long-acting adhesive covered by a strip of protective paper 255 extends between the lateral ends of the fastening tabs 252 and 253 by passing through the closure panel 250. Of course, other means fasteners may be provided instead of or in addition to these strips of adhesive. I &

  A tear strip 256, located between the transverse wall 209 and the protective paper strips 255, is pre-cut perpendicularly to the fold lines 202 and 203 and extends right through the blank 200, that is to say that is, it starts from the outer edge of the fixing lug 252, passes through the closing panel 250 and opens out on the outer edge of the fixing lug 253.

  The transverse wall 208 is extended by a rectangular panel 260 called "doubling panel" with reference to the closed container. This panel 260 has the same dimensions as the base 201 and the closure panel 250.

  The container shaping steps illustrated in FIGS. 16 to 19 are identical to those illustrated in FIGS. 5 to 7 previously described.

  Figure 19 shows that the side extensions 236 and 237 being folded, there is between them only a very small space to limit heat exchange. In addition, it can be seen that they constitute an important bearing surface for the doubling panel 260 when it is folded down (FIGS. 20 and 21). This large contact area contributes to the insulation by preventing air from flowing from the inside of the container to the outside.

  To close the container, the protective paper 255 is peeled off to expose the long-acting adhesive A (FIG. 20), then the doubling panel 260 is applied to the lateral extensions 236 and 237 (FIG. the closure panel 250 on the backing panel (Fig. 22) and the fastening lugs 252 and 253 are folded over the adjacent walls 206 and 207 (Fig. 23).

  As shown in FIGS. 24 and 25, heat exchange through the container opening is almost impossible since there are three superimposed layers of blank 200, the outermost being sealed to the intermediate layer by adhesive A. Other forms may be given to the blank, for example the blank 300 shown in FIG. 26.

  The base 301 is hexagonal and extended by six adjacent walls 302. These are each integral with two connecting lugs 310-311, 312313, 314-315, 316-16, 318-318, 313-321.

  2856387 Two adjacent walls 302 are integral, for one of a lining panel 325 and the other of a closure panel 326, both of the same shape and the same surface as the base 301.

  The other adjacent walls 302 may be integral with lateral extensions, or flaps, 327, 328, 329 and 330 which have a shape such that they overlap together when folded vertically above the base 301. opening of the container body.

  The closure panel 326 is integral with fasteners 335 the number of which is equal to the total number of sides of the container body minus one ("one" representing the integral side of the closure panel 326). If, as is the case here, the container has a doubling panel 325, the number of fastening tabs 335 is equal to the total number of sides of the container body minus two. In this case, and for convenience of manufacture, the fastening tabs can be distributed over the two panels 325 and 326.

  In all the examples, the fixing lugs are arranged such that all the edges of the sides of the container body are hermetically closed either by the fixing lugs or by fold lines.

  The steps of setting the volume of the blank are identical to those described above: the joining tabs 310-311, 312-313, 314-315, 316-317, 318-319, 320-321 are glued together as they extend inside the container set in volume without being applied against one or the other of the adjacent walls, the articles to be packaged are placed in the body of the container thus formed, the side extensions 327 are folded down, 328, 329 and 330 if there are, then the doubling panel 325 if it is present and the closing panel, finally it closes everything by gluing the fastening lugs 335.

  According to a variant of the invention, the fastening means of the adjacent junction lugs (111-118, 112-115, 113-116, 114-117, 211-218, 212-215, 213216, 214-217, 310- 311, 312-313, 314-315, 316-317, 318-318, 320-321) consist of clips, of the push-button type, composed of a male part to be attached to a female part. . i

  For example, the male part is fixed on the connecting tabs 111, 112, 113, 114, 211, 212, 213, 214, 310, 312, 314, 316, 318 and 320, and the female part is fixed on the connecting tabs 118, 115, 116, 117, 218, 215, 216, 217, 311, 313, 315, 317, 318 and 321 so that when two adjacent joining tabs are folded over each other the male and female parts engage. In order to obtain a tamper-proof cardboard box, it is necessary to use single-use clips, that is to say that when the male and female parts are joined, they can not be separated without damage.

  By analogy, according to a variant of the invention, the closure panel (150) is integral with two lateral fastening tabs (152, 154) and a transverse fixing tab (153), these three tabs being provided with male portions of clips to be inserted during closure into female portions on adjacent walls (106, 107, 108).

  Thus, the multiplicity of shapes permitted by a blank according to the invention makes it possible to adapt the measurements and the shape of the blank according to the request.

17 2856387

Claims (21)

  1. Cardboard blank or similar material cut, grooved and optionally printed, which has flat all the means of constituting a container, namely on the one hand a flat polygonal base (101, 201, 301) and walls adjacent (106, 107, 108, 109, 206, 207, 208, 209, 302) to the base (101, 201, 301) to be subsequently rectified relative to said base (101, 201, 301) for constituting a container body in volume, characterized in that it consists of at least one sheet of corrugated cardboard (4) and at least one sheet 10 of a thermo-insulating material or a thermally insulating structure (e ), that each adjacent wall (106, 107, 108, 109, 206, 207, 208, 209, 302) at the base (101, 201, 301) is integral with two connecting lugs (111-112, 113-114 , 115-116, 117118, 211-212, 213-214, 215-216, 217-218, 311-312, 313-314, 315-316, 317-318, 319-320, 310-321), each of it being secured to the adjoining leg 15 by a line for folding (121, 122, 123, 124) so that, after straightening the adjacent walls (106, 107, 108, 109, 206, 207, 208, 209, 302), two adjacent joining lugs (111-118, 112 115, 113-116, 114-117, 211-218, 212-215, 213216, 214-217, 310-311, 312-313, 314-315, 316-317, 318-318, 320-321) are applied against each other and thus held by fastening means (A, 131, 132, 133, 134).   2. Cardboard blank according to claim 1 characterized in that at least three adjacent walls (106, 107, 108, 109, 206, 207, 208, 209, 302) are integral with extensions (136, 137, 150, 236). , 237, 250, 260, 325, 326, 327, 328, 329, 330) to be folded vertically above the base (101, 201, 301).   3. Cardboard blank according to claim 1 characterized in that the connecting lugs (111-112, 113-114, 115-116, 117-118, 211-212, 213-214, 215216, 217-218, 311- 312, 313-314, 315-316, 317-318, 319-320, 310-321) and the adjacent walls (106, 107, 108, 109, 206, 207, 208, 209, 302) are connected by lines folding means according to which said connecting tabs can be folded.   4. Cardboard blank according to claim 1 characterized in that along the fold line located between two junction lugs (111-118, 112115, 18 2856387 113-116, 114-117, 211-218, 212-215 , 213-216, 214-217, 310-311, 312-313, 314315, 316-317, 318-318, 320-321), the corrugated board and the isothermal layer are pressed.   5. Cardboard blank according to claim 1, characterized in that along the pre-fold line situated between two joining tabs (111-118, 112115, 113-116, 114-117, 211-218, 212-215, 213-216, 214-217, 310-311, 312-313, 314-315, 316-317, 318-318, 320-321), the isothermal layer alone is cut.   6. Cardboard blank according to claim 1, characterized in that the fastening means of the adjacent connecting tabs (111-118, 112-115, 113116, 114-117, 211-218, 212-215, 213-216, 214-217, 310-311, 312-313, 314-315, 316317, 318-318, 320-321) are constituted by prolonged effect adhesive (A) covered before fixing a protective paper (131 , 132, 133, 134).   Cardboard blank according to claim 6, characterized in that long-acting adhesive (A) is arranged on at least two non-adjacent junction lugs (111-112, 113-114, 115-116, 117- 118, 211-212, 213-214, 215-216, 217218, 311-312, 313-314, 315-316, 317-318, 319-320, 310-321).   8. Cardboard blank according to claim 6, characterized in that for each adjacent wall (106, 107, 108, 109, 206, 207, 208, 209, 302) at the base (101, 201, 301), of the Long-acting adhesive (A) is disposed on a connecting tab (111-112, 113-114, 115-116, 117-118, 211-212, 213-214, 215-216, 217218, 311-312, 313-314, 315-316, 317-318, 319-320, 310-321), such that on two adjacent junction lugs, only one is covered with adhesive (A).   9. Cardboard blank according to claim 1 characterized in that the jaws (111-118, 112-115, 113-116, 114-117, 211-218, 212-215, 21325 216, 214-217, 310- 311,312-313, 314-315, 316-317,318-318, 320-321) extend inside the container placed in volume without necessarily being applied against one or the other of the adjacent walls (106, 107, 108, 109, 206, 207, 208, 209, 302).   10. Cardboard blank according to claim 9, characterized in that the joining tabs are applied against each other (111-118, 112115, 113116, 114-117, 211-218, 212-215, 213-216, 214 -217, 310-311,312-313, 314-315, 2856387 316-317, 318-318, 320-321) exhibit a certain resistance to thrust so that they play a role in maintaining the objects arranged in the container put in volume.   11. Cardboard blank according to claim 1, characterized in that the adjacent walls (106, 107, 206, 207, 302) are integral with lateral extensions (136, 137, 236, 237, 327, 328, 329, 330). whose length is at most equal to half the length of the base (101, 201, 301).   A carton blank according to claim 1 characterized in that the lateral extensions (136, 137, 236, 237) have a length equal to half the length of the base (101, 201, 301).   13. Cardboard blank according to claim 1 characterized in that the lateral extensions (136, 137, 236, 237) have a closing tab (136a-136b 137a-137b, 236a-236b, 237a-237b) on each of their facing a junction tab (115, 118, 116, 117), said tab (136a-136b, 137a-137b, 236a-236b, 237a-237b) being located between the connecting tab (115 , 118, 116, 117) and the transverse wall which is integral with the closure of the container.   14. Cardboard blank according to claim 1 characterized in that only three adjacent walls (106, 107, 109) are integral with extensions 20 to be folded vertically above the base (101), two side (136, 137). and a transverse so-called "closure panel" (150).   15. Cardboard blank according to claim 14 characterized in that the closure panel (150) is secured to two lateral fastening tabs (152, 154) and a transverse fastening tabs (153), the adhesive to prolonged effect being disposed on these three legs.   16. Cardboard blank according to claim 1 characterized in that four adjacent walls (206, 207, 208, 209, 302) are integral with extensions (236, 237, 250, 260, 325, 326, 327, 328, 329, 330) to be folded vertically above the base (201, 301), two lateral (236, 237, 327, 328, 329, 330) and two transverse (250, 260, 325, 326), the one said "closure panel" (250, 326), the other so-called "doubling panel" (260, 325).   2856387 Cardboard blank according to claim 16, characterized in that the doubling panel (260, 325) has a length identical to that of the base (101, 201, 301).   Paperboard blank according to claim 1, characterized in that the sheet of thermally insulating material (e) is complex and comprises at least two aluminum sheets (1, 3) and at least one layer of synthetic foam (2). located between two sheets of aluminum (1, 3), one of them (3) being associated by gluing to a sheet of corrugated cardboard (4).   Cardboard blank according to Claim 1, characterized in that all the edges of the sides of the container body are hermetically closed either by the fastening tabs (152, 153, 154, 252, 253, 335) or by folding.   20. Cardboard blank according to claim 1, characterized in that the fastening means of the adjacent connecting tabs (111-118, 112-115, 113116, 114-117, 211-218, 212-215, 213-216, 214-217, 310-311, 312-313, 314315, 316317, 318-318, 320-321) are constituted by plastic clips composed of a male part to be fixed to a female part.   21. Cardboard blank according to claim 14 characterized in that the closing panel (150) is integral with two lateral fastening tabs (152, 154) and a transverse fastening tab (153), these three tabs being provided with male parts of clips to be inserted during closure into female parts on the adjacent walls (106, 107, 108).