EP0760783A1 - Foldable cup with a prefolded convex base - Google Patents

Foldable cup with a prefolded convex base

Info

Publication number
EP0760783A1
EP0760783A1 EP95921870A EP95921870A EP0760783A1 EP 0760783 A1 EP0760783 A1 EP 0760783A1 EP 95921870 A EP95921870 A EP 95921870A EP 95921870 A EP95921870 A EP 95921870A EP 0760783 A1 EP0760783 A1 EP 0760783A1
Authority
EP
European Patent Office
Prior art keywords
cup
grooves
edges
diamonds
vertices
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP95921870A
Other languages
German (de)
French (fr)
Inventor
Gilbert Capy
Akiva Buchberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0760783A1 publication Critical patent/EP0760783A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/36—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper specially constructed to allow collapsing and re-erecting without disengagement of side or bottom connections
    • B65D5/3607—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper specially constructed to allow collapsing and re-erecting without disengagement of side or bottom connections formed by folding or erecting a single blank
    • B65D5/3685—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper specially constructed to allow collapsing and re-erecting without disengagement of side or bottom connections formed by folding or erecting a single blank by folding the blank to U-shape to form the base and opposite sides, the remaining sides being formed by extensions of these opposite sides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
    • B65D3/02—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines characterised by shape
    • B65D3/08—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines characterised by shape having a cross-section of varying shape, e.g. circular merging into square or rectangular

Definitions

  • the present invention relates to the manufacture of foldable cups of the kind described in the patents
  • the cups described in these patents have the main advantages of being able to be manufactured continuously from a reel of plasticized cardboard on one side, to have a good quality seal, to have a very easy to unfold and perfectly locked bottom, in the natural direction of grasping, when drinking from this cup and having in the grasping zones a double wall allowing the fingers of the consumer to be well insulated when the liquid is hot.
  • the first problem with these cups is that they use a concave bottom and that, when you use the cup to consume a drink that needs to be sweetened, it is difficult to dissolve the sugar because you have to stir the liquid in both hollows formed by the concave bottom of the cup.
  • the second problem is that the stabilization of these cups is carried out thanks to the addition of stabilizers which generally use an additional quantity of cardboard which is not negligible; it is however possible in certain cases to save on cardboard, but this is to the detriment of the aesthetic appearance or the simplicity of manufacture.
  • Such a cup therefore has the advantage of having, in addition to the convex bottom, good stability which is obtained automatically by unfolding the assembly; a drawback is that its unfolding is obtained by pressing the cup parallel to the fold line of the bottom which must buckle under the force in suitable points to obtain a correct forming of the bottom; even with correct creasing we are not sure of the result if the folding has not already been operated at least once; even having been folded beforehand, as long as the cardboard is damp it remains very difficult to open.
  • the fold line of the bottom is parallel to the lateral sides on which the fingers naturally rest when grabbing the cup for drinking; this line constitutes a zone of weakness which can lead to untimely reclosure of the cup with a reduction in volume which can cause an overflow of liquid.
  • Patent FR-A-2707467 proposes a solution to eliminate this line of weakness and to make the unfolding of the bottom more reliable in the case of a concave bottom.
  • the present invention aims to provide a foldable cup, having a pre-folded convex bottom so that the deployment has total reliability not including in particular a fold line weakening its locking in the open position.
  • Figure 1 shows a cut and grooved blank, seen from above, one end of which has been removed, with phantom in the creases which allow the formation of the cup according to the invention.
  • FIG. 2 represents a perspective view of the cup corresponding to the blank of FIG. 1 formed in the unfolded position on which a cut has been made to show the interior thereof.
  • Figure 3 shows the cup of Figure 2 folded according to the invention.
  • FIG. 4 shows a cut and grooved blank, seen from above, according to a variant of the invention.
  • FIG. 5 represents a cut and grooved blank, seen from above, according to another variant of the invention.
  • Figure 6 shows a cut and grooved blank seen from above, of another variant of the invention.
  • FIG. 7 represents a perspective view of the cup corresponding to the blanks of FIGS. 5 and 6 formed in the unfolded position on which a cut has been made to show the interior thereof.
  • this cup we start, for example, from an elongated rectangular semi-rigid sheet (fig.l); the length of the long side being, for example, greater than twice the length of the short side.
  • Two grooves are made parallel to the long sides defining strips of width A which are used to fix the side walls of the cup onto themselves; the distance between these two grooves 1 is equal to B.
  • a third crease is placed parallel to the creases 1 and at equal distance, equal to B / 2, from these.
  • two points 4 and 5 are placed on the grooves 1 so that the fictitious straight line joining these two points 4 and 5 is perpendicular to the grooves 1 and 2.
  • Points 4 and 5 leave two grooves 7 and 8 of length A, perpendicular to the grooves 1 and which join the points 4 and 5 at their respective long sides of the sheet.
  • the sides 12 and 13 of the isosceles triangles joining the vertices 4 and 5 respectively to the vertices 10 and 11 delimiting the common base 9 are grooved and delimit the bottom of the unfolded cup.
  • the cup (fig.2), fold the strips of width A delimited by the grooves 1 in the form of "" while forming the bottom of the cup in its unfolded configuration; the two lower points of the "W” consist of the grooves 19 and 20 situated at the ends of the grooves 17, between the grooves 1 and the edges of the sheet, and the central point of the "W” consists of the grooves 7 and 8; the two isosceles triangles with vertex 4 and 5 and common base 9 form a dihedral constituting the convex bottom, the edge of which consists of the common base 9; the support polygon of the cup is in particular constituted by a rhombus formed by folding on itself the sheet according to the grooves 17, so that the diamonds 14 are folded back on themselves along the diagonal 16 holding the ends of the edge of the bottom 9 at a distance from the lift polygon equal to D / 2.
  • the side walls of the cup are formed by two dihedrons 21 corresponding to the areas delimited by the grooves 1, 2 and 17 located on the side and the other from the bottom of the cup.
  • the cup is thus formed, it is possible to fix between them the faces in contact with the strips of width A folded back on themselves in the form of "W" as described above; the purpose of this operation is to connect, in the upper part, in a sealed manner the edges 1 of the two dihedrons 21 between them, and in the lower part the edges of the dihedrons 21 to the parts of the strip of width A situated between the grooves 19 and 20 corresponding to the internal part of the "W" fold.
  • one way of proceeding consists in using a sheet of cardboard coated on one side with a layer of heat-sealable liquid-tight material to make the cup; the bending of the cup is done with this layer placed inside and the strip of width A when it is folded in "W" with its coated faces applied one against the other; the fixing of these faces is done by heating through the cardboard; great care must be taken, however, with regard to welding in the area adjacent to grooves 7 and 8 where the thickness to be welded changes from four thicknesses of cardboard to two thicknesses; the part of the strip of width A situated between the two internal branches of the "W" corresponds to two surfaces in contact which are not coated with heat-sealable material; one can either leave them like this, if the cardboard used is sufficiently rigid, or join them together by hot gluing, knurling or stapling, without this list being exhaustive.
  • the folding of the cup is obtained, for example, by spreading from the inside the edges 2 (fig.2) forming the dihedrons of the lateral faces 21; the diagonals 15 (fig. 3) of the diamonds 14, the ends 10 and 11 of which are connected by the bottom edge 9 gradually unfold and the diamonds 14 fold over themselves no longer along the diagonal 16 as before but according to the diagonal 15; the dihedrons formed by the edges 12 and 13 which delimit the bottom dihedral realign while the edges 18 form to form two equal pentagons superimposed constituting the folded bottom having the bottom edge 9 in common.
  • Each of the pentagons is also delimited by the edges corresponding to the two grooves 18 (fig.l) as well as the grooves corresponding to the sides 22 of the diamonds 14 which connect their ends to the ends 10 and 11 on the common side 9 to the two pentagons.
  • This cup can be manufactured continuously from a spool whose width is equal to the length of the long side of the rectangular sheet from which one started to form the cup, using a process identical to that described in the cited patents.
  • the sides adjacent to the vertices 23 of the isosceles triangles forming the bottom of the unfolded cup are replaced by curved grooves 24 of the same curvature situated either externally as indicated in FIG. 4, or internally, at the triangles of vertices 23.25.26.
  • the grooves 24 of FIG. 4 are replaced by four grooves 27 formed of a succession of straight lines forming a convex polygon having an axis of symmetry with respect to the line joining the vertices 28 and 29. Creases
  • FIG. 7 represents the cup corresponding to the blanks of FIGS. 5 or 6 in which the side walls are formed of two trihedrons 37 and 38.
  • the bottom of the cup no longer forms a dihedral as shown in FIG. 2, but a polyhedron 39.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Table Devices Or Equipment (AREA)
  • Packages (AREA)

Abstract

Cup made from a rectangular sheet folded to form a convex base consisting of two isosceles triangles with a common base (9). The ends (10 and 11) of the common base extend into two areas in the shape of deformable lozenges for folding and unfolding the cup while leaving the base (9) flat. When the cup is unfolded by pressing on the edges (2) to draw them together, the ends (10 and 11) abut on the edges (2) of the dihedrals (21) forming the cup sides, thereby locking the cup into an open position.

Description

Gobelet dépliable à fond convexe préplié.Foldable cup with pre-folded convex bottom.
La présente invention concerne la fabrication des gobelets pliables du genre de ceux décrits dans les brevetsThe present invention relates to the manufacture of foldable cups of the kind described in the patents
FR-A-2707467, FR-A-2710005 , FR-A-2712788 , visant des gobelets dépliables ayant un fond concave préplié permettant un bon verrouillage.FR-A-2707467, FR-A-2710005, FR-A-2712788, targeting unfoldable cups with a pre-folded concave bottom allowing good locking.
Les gobelets décrits dans ces brevets présentent les principaux avantages de pouvoir être fabriqués en continu à partir d'une bobine de carton plastifié sur une face, de présenter une étanchéité de bonne qualité, d'avoir un fond très facile à déplier et parfaitement verrouillé, dans le sens naturel de préhension, lorsqu'on boit à ce gobelet et d'avoir dans les zones de préhension une double paroi permettant de bien isoler les doigts du consommateur lorsque le liquide est chaud. Le premier problème de ces gobelets est qu'ils utilisent un fond concave et que, lorsqu'on emploie le gobelet pour consommer une boisson qu'il faut sucrer, il est difficile de dissoudre le sucre car il faut agiter le liquide dans chacun des deux creux formés par le fond concave du gobelet. Le second problème est que la stabilisation de ces gobelets est réalisée grâce à l'apport de stabilisateurs qui utilisent généralement une quantité de carton supplémentaire qui n'est pas négligeable; il est cependant possible de réaliser dans certains cas des économies de carton, mais c'est au détriment de l'aspect esthétique ou de la simplicité de fabrication.The cups described in these patents have the main advantages of being able to be manufactured continuously from a reel of plasticized cardboard on one side, to have a good quality seal, to have a very easy to unfold and perfectly locked bottom, in the natural direction of grasping, when drinking from this cup and having in the grasping zones a double wall allowing the fingers of the consumer to be well insulated when the liquid is hot. The first problem with these cups is that they use a concave bottom and that, when you use the cup to consume a drink that needs to be sweetened, it is difficult to dissolve the sugar because you have to stir the liquid in both hollows formed by the concave bottom of the cup. The second problem is that the stabilization of these cups is carried out thanks to the addition of stabilizers which generally use an additional quantity of cardboard which is not negligible; it is however possible in certain cases to save on cardboard, but this is to the detriment of the aesthetic appearance or the simplicity of manufacture.
Il y a de nombreux brevets qui cherchent à résoudre le problème du fond concave; ils procèdent tous en inversant la concavité du fond de manière que l'intérieur du gobelet ait un fond convexe ne comportant plus qu'un creux au centre; si on prend par exemple le brevet U.S.3,726,469 le fond est obtenu à partir d'une feuille pliée en "W" de manière que la partie centrale serve à former le fond convexe, tandis que la ligne de pliage séparant la partie centrale du gobelet des parties latérales sert de polygone d'appui du gobelet sur une surface plane. Un tel gobelet présente donc l'avantage d'avoir en plus du fond convexe une bonne stabilité qui s'obtient automatiquement par dépliage de l'ensemble; un inconvénient est que son dépliage s 'obtient en appuyant sur le gobelet parallèlement à la ligne de repliage du fond qui doit flamber sous l'effort dans des points convenables pour obtenir un formage correct du fond; même avec un rainage correct on n'est pas sûr du résultat si on n'a pas fait déjà fonctionner le pliage au moins une fois; même en ayant été plié préalablement, pour peu que le carton soit humide il reste très difficile à ouvrir. Lorsque le fond est déployé la ligne de repliage du fond est parallèle aux côtés latéraux sur lesquels s'appuient naturellement les doigts lorsqu'on saisit le gobelet pour boire; cette ligne constitue une zone de faiblesse pouvant conduire à la refermeture intempestive du gobelet avec une diminution de volume pouvant provoquer un débordement de liquide.There are many patents which seek to solve the problem of the concave bottom; They all proceed by inverting the concavity of the bottom so that the interior of u cup has a convex bottom most having only one hollow in the center; if we take for example the patent US3,726,469 the bottom is obtained from a sheet folded in "W" so that the central part serves forming the convex bottom, while the fold line separating the central part of the cup from the lateral parts serves as a support polygon for the cup on a flat surface. Such a cup therefore has the advantage of having, in addition to the convex bottom, good stability which is obtained automatically by unfolding the assembly; a drawback is that its unfolding is obtained by pressing the cup parallel to the fold line of the bottom which must buckle under the force in suitable points to obtain a correct forming of the bottom; even with correct creasing we are not sure of the result if the folding has not already been operated at least once; even having been folded beforehand, as long as the cardboard is damp it remains very difficult to open. When the bottom is deployed the fold line of the bottom is parallel to the lateral sides on which the fingers naturally rest when grabbing the cup for drinking; this line constitutes a zone of weakness which can lead to untimely reclosure of the cup with a reduction in volume which can cause an overflow of liquid.
Le brevet FR-A-2707467 propose une solution pour supprimer cette ligne de faiblesse et pour fiabiliser le dépliage du fond dans le cas d'un fond concave. La présente invention a pour but de proposer un gobelet pliable, ayant un fond convexe préplié de manière que le déploiement ait une fiabilité totale ne comprenant pas notamment de ligne de pliage affaiblissant son verrouillage en position ouverte. La figure 1 présente un flan découpé et rainé, vu de dessus, dont une des extrémités a été supprimée, avec en traits mixtes les rainages qui permettent la formation du gobelet selon l'invention.Patent FR-A-2707467 proposes a solution to eliminate this line of weakness and to make the unfolding of the bottom more reliable in the case of a concave bottom. The present invention aims to provide a foldable cup, having a pre-folded convex bottom so that the deployment has total reliability not including in particular a fold line weakening its locking in the open position. Figure 1 shows a cut and grooved blank, seen from above, one end of which has been removed, with phantom in the creases which allow the formation of the cup according to the invention.
La figure 2 représente une vue en perspective du gobelet correspondant au flan de la figure 1 formé en position dépliée sur lequel on a fait une découpe pour en montrer l'intérieur. La figure 3 représente le gobelet de la figure 2 replié suivant l'invention.FIG. 2 represents a perspective view of the cup corresponding to the blank of FIG. 1 formed in the unfolded position on which a cut has been made to show the interior thereof. Figure 3 shows the cup of Figure 2 folded according to the invention.
La figure 4 représente un flan découpé et rainé, vu de dessus, selon une variante de l'invention. La figure 5 représente un flan découpé et rainé, vu de dessus,selon une autre variante de l'invention.Figure 4 shows a cut and grooved blank, seen from above, according to a variant of the invention. FIG. 5 represents a cut and grooved blank, seen from above, according to another variant of the invention.
La figure 6 montre un flan découpé et rainé vu de dessus, d'une autre variante de l'invention.Figure 6 shows a cut and grooved blank seen from above, of another variant of the invention.
La figure 7 représente une vue en perspective du gobelet correspondant aux flans des figures 5 et 6 formé en position dépliée sur lequel on a fait une découpe pour en montrer l'intérieur.FIG. 7 represents a perspective view of the cup corresponding to the blanks of FIGS. 5 and 6 formed in the unfolded position on which a cut has been made to show the interior thereof.
On ne décrit ci-après que la configuration du fond du gobelet dépliable et la façon dont il se plie et se déplie; toutes les configurations concernant le bord supérieur décrites dans les brevets susmentionnés sont applicables.We only describe below the configuration of the bottom of the foldable cup and how it folds and unfolds; all the configurations relating to the upper edge described in the aforementioned patents are applicable.
Pour réaliser ce gobelet on part, par exemple, d'une feuille semi-rigide rectangulaire allongée (fig.l); la longueur du grand côté étant, par exemple, supérieur au double de la longueur du petit côté. On réalise deux rainages parallèlement aux grands côtés déterminant des bandes de largeur A qui servent à la fixation sur elles- mêmes des parois latérales du gobelet; la distance entre ces deux rainages 1 est égale à B. Un troisième rainage est placé parallèlement aux rainages 1 et à égale distance, égale à B/2, de ceux-ci. De préférence à égale distance des petits côtés 3 de la feuille rectangulaire, on place sur les rainages 1 deux points 4 et 5 de manière que la droite fictive joingnant ces deux points 4 et 5 soit perpendiculaire aux rainages 1 et 2. Des points 4 et 5 partent deux rainages 7 et 8 de longueur A, perpendiculaires aux rainages 1 et qui joignent les points 4 et 5 à leurs grands côtés respectifs de la feuille. Les points 4 et 5 sont les sommets de deux triangles isocèles ayant une base commune 9 de longueur C située sur le rainage 2; la longueur C de la base commune 9 détermine la largeur d'ouverture du gobelet lorsqu'il est déplié et doit être notablement inférieure à la distance B séparant les deux rainages 1; à titre d'exemple si on veut une ouverture formant un carré, il faut choisir C=B*0,707. Les côtés 12 et 13 des triangles isocèles joignant respectivement les sommets 4 et 5 aux sommets 10 et 11 délimitant la base commune 9 sont rainés et délimitent le fond du gobelet déplié. De part et d'autre des points 10 et 11 on place deux rainages en forme de losanges égaux 14 dont on raine aussi les diagonales 15 et 16; la diagonale 15 qui est confondue avec la ligne médiane 2 a une longueur D=(BC)*0,707 tandis que la diagonale 16 a une longueur E=D/2. Deux rainages 17 prolongent les diagonales 16 des losanges 14 perpendiculairement aux lignes des rainages 1 et 2; ces lignes 17 constituent le polygone d'appui du gobelet déplié. Enfin, on joint par des rainages 18 les sommets 4 et 5 aux extrémités des diagonales 16 des losanges 14; ces lignes sont les lignes de repliage du fond du gobelet replié. Pour former le gobelet (fig.2) on plie les bandes de largeur A délimitées par les rainages 1 en forme de " " tout en formant le fond du gobelet dans sa configuration dépliée; les deux pointes inférieures du "W" sont constituées des rainages 19 et 20 situés aux extrémités des rainages 17, entre les rainages 1 et les bords de la feuille, et la pointe centrale du "W" est constituée des rainages 7 et 8; les deux triangles isocèles de sommet 4 et 5 et de base commune 9 forment un dièdre constituant le fond convexe dont l'arête est constituée de la base commune 9; le polygone de sustentation du gobelet est notamment constitué par un losange formé par le pliage sur ellemême de la feuille suivant les rainages 17, si bien que les losanges 14 sont repliés sur eux-même suivant la diagonale 16 maintenant les extrémités de l'arête du fond 9 à une distance du polygone de sustentation égale à D/2. Les parois latérales du gobelet sont formées de deux dièdres 21 correspondant aux zones délimitées par les rainages 1, 2 et 17 situées de part et d'autre du fond du gobelet. Lorsque le gobelet est ainsi formé, on peut fixer entre elles les faces en contact des bandes de largeur A repliées sur elles-mêmes en forme de "W" comme décrit précédemment; cette opération a pour but de relier, dans la partie supérieure, de manière étanche les bords 1 des deux dièdres 21 entre eux, et dans la partie basse les bords des dièdres 21 aux parties de la bande de largeur A située entre les rainages 19 et 20 correspondant à la partie interne du pliage en "W". A titre d'exemple non limitatif, une manière de procéder consiste à utiliser pour faire le gobelet une feuille de carton enduite sur une face d'une couche de matière thermo-soudable étanche aux liquides; le pliage du gobelet se fait avec cette couche placée à l'intérieur et la bande de largeur A lorsqu'elle est repliée en "W" a ses faces enduites appliquées l'une contre l'autre; la fixation de ces faces se fait par chauffage à travers le carton; il faut prendre cependant beaucoup de précautions en ce qui concerne la soudure dans la zone voisine des rainages 7 et 8 où l'épaisseur à souder passe de quatre épaisseurs de carton à deux épaisseurs; la partie de la bande de largeur A située entre les deux branches internes du "W" correspond à deux surfaces en contact qui ne sont pas enduites de matière thermo-soudable; on peut soit les laisser comme cela, si le carton utilisé est suffisamment rigide, ou les solidariser par collage à chaud, moletage ou agrafage, sans que cette liste soit limitative.To make this cup, we start, for example, from an elongated rectangular semi-rigid sheet (fig.l); the length of the long side being, for example, greater than twice the length of the short side. Two grooves are made parallel to the long sides defining strips of width A which are used to fix the side walls of the cup onto themselves; the distance between these two grooves 1 is equal to B. A third crease is placed parallel to the creases 1 and at equal distance, equal to B / 2, from these. Preferably at equal distance from the short sides 3 of the rectangular sheet, two points 4 and 5 are placed on the grooves 1 so that the fictitious straight line joining these two points 4 and 5 is perpendicular to the grooves 1 and 2. Points 4 and 5 leave two grooves 7 and 8 of length A, perpendicular to the grooves 1 and which join the points 4 and 5 at their respective long sides of the sheet. Points 4 and 5 are the vertices of two isosceles triangles having a common base 9 of length C located on the groove 2; the length C of the common base 9 determines the opening width of the cup when it is unfolded and must be significantly less than the distance B between the two grooves 1; as an example if you want an opening forming a square, choose C = B * 0.707. The sides 12 and 13 of the isosceles triangles joining the vertices 4 and 5 respectively to the vertices 10 and 11 delimiting the common base 9 are grooved and delimit the bottom of the unfolded cup. On either side of points 10 and 11, two grooves in the form of equal diamonds 14 are placed, the diagonals 15 and 16 of which are also aligned; the diagonal 15 which is confused with the center line 2 has a length D = (BC) * 0.707 while the diagonal 16 has a length E = D / 2. Two grooves 17 extend the diagonals 16 of the diamonds 14 perpendicular to the lines of the grooves 1 and 2; these lines 17 constitute the support polygon of the unfolded cup. Finally, the vertices 4 and 5 are joined by grooves 18 at the ends of the diagonals 16 of the diamonds 14; these lines are the fold lines of the bottom of the folded cup. To form the cup (fig.2), fold the strips of width A delimited by the grooves 1 in the form of "" while forming the bottom of the cup in its unfolded configuration; the two lower points of the "W" consist of the grooves 19 and 20 situated at the ends of the grooves 17, between the grooves 1 and the edges of the sheet, and the central point of the "W" consists of the grooves 7 and 8; the two isosceles triangles with vertex 4 and 5 and common base 9 form a dihedral constituting the convex bottom, the edge of which consists of the common base 9; the support polygon of the cup is in particular constituted by a rhombus formed by folding on itself the sheet according to the grooves 17, so that the diamonds 14 are folded back on themselves along the diagonal 16 holding the ends of the edge of the bottom 9 at a distance from the lift polygon equal to D / 2. The side walls of the cup are formed by two dihedrons 21 corresponding to the areas delimited by the grooves 1, 2 and 17 located on the side and the other from the bottom of the cup. When the cup is thus formed, it is possible to fix between them the faces in contact with the strips of width A folded back on themselves in the form of "W" as described above; the purpose of this operation is to connect, in the upper part, in a sealed manner the edges 1 of the two dihedrons 21 between them, and in the lower part the edges of the dihedrons 21 to the parts of the strip of width A situated between the grooves 19 and 20 corresponding to the internal part of the "W" fold. By way of nonlimiting example, one way of proceeding consists in using a sheet of cardboard coated on one side with a layer of heat-sealable liquid-tight material to make the cup; the bending of the cup is done with this layer placed inside and the strip of width A when it is folded in "W" with its coated faces applied one against the other; the fixing of these faces is done by heating through the cardboard; great care must be taken, however, with regard to welding in the area adjacent to grooves 7 and 8 where the thickness to be welded changes from four thicknesses of cardboard to two thicknesses; the part of the strip of width A situated between the two internal branches of the "W" corresponds to two surfaces in contact which are not coated with heat-sealable material; one can either leave them like this, if the cardboard used is sufficiently rigid, or join them together by hot gluing, knurling or stapling, without this list being exhaustive.
Le repliage du gobelet (fig.3) s'obtient, par exemple, en écartant par l'intérieur les arêtes 2 (fig.2) formant les dièdres des faces latérales 21; les diagonales 15 (fig.3) des losanges 14 dont les extrémités 10 et 11 sont reliées par l'arête de fond 9 se déplient progressivement et les losanges 14 se replient sur eux- mêmes non plus suivant la diagonale 16 comme précédemment mais suivant la diagonale 15; les dièdres formés par les arêtes 12 et 13 qui délimitaient le dièdre du fond se réalignent tandis que se forment les arêtes 18 pour former deux pentagones égaux superposés constituant le fond replié ayant l'arête de fond 9 en commun. Chacun des pentagones est aussi délimité par les arêtes correspondant aux deux rainages 18 (fig.l) ainsi que les rainages correspondant aux côtés 22 des losanges 14 qui relient leurs extrémités aux extrémités 10 et 11 du côté commun 9 aux deux pentagones.The folding of the cup (fig.3) is obtained, for example, by spreading from the inside the edges 2 (fig.2) forming the dihedrons of the lateral faces 21; the diagonals 15 (fig. 3) of the diamonds 14, the ends 10 and 11 of which are connected by the bottom edge 9 gradually unfold and the diamonds 14 fold over themselves no longer along the diagonal 16 as before but according to the diagonal 15; the dihedrons formed by the edges 12 and 13 which delimit the bottom dihedral realign while the edges 18 form to form two equal pentagons superimposed constituting the folded bottom having the bottom edge 9 in common. Each of the pentagons is also delimited by the edges corresponding to the two grooves 18 (fig.l) as well as the grooves corresponding to the sides 22 of the diamonds 14 which connect their ends to the ends 10 and 11 on the common side 9 to the two pentagons.
Pour ouvrir le gobelet, préalablement replié comme décrit précédemment, il suffit d'appuyer sur les arêtes 2 (fig.3) en les pinçant par exemple entre le pouce et l'index. Les dièdres formant les faces latérales s'ouvrent, les losanges 14 se déploient pour ensuite se replier sur eux-mêmes, suivant la diagonale 16, jusqu'à ce que les extrémités 10 et 11 de l'arête de fond 9 viennent en butée sur l'arête 2 des dièdres 21 (fig.2).To open the cup, previously folded as described above, simply press the edges 2 (fig.3) by pinching them for example between the thumb and forefinger. The dihedrons forming the lateral faces open, the diamonds 14 deploy and then fold back on themselves, along the diagonal 16, until the ends 10 and 11 of the bottom edge 9 come into abutment on the edge 2 of the dihedrons 21 (fig. 2).
Ce gobelet peut être fabriqué en continu à partir d'une bobine dont la laize est égale à la longueur du grand côté de la feuille rectangulaire dont on est parti pour former le gobelet, en utilisant un procédé identique à celui décrit dans les brevets cités.This cup can be manufactured continuously from a spool whose width is equal to the length of the long side of the rectangular sheet from which one started to form the cup, using a process identical to that described in the cited patents.
Selon la variante de la figure 4, les côtés adjacents aux sommets 23 des triangles isocèles formant le fond du gobelet déplié sont remplacés par des rainages courbes 24 de même courbure situés soit extérieurement comme indiqué sur la figure 4, soit intérieurement, aux triangles de sommets 23,25,26.According to the variant of FIG. 4, the sides adjacent to the vertices 23 of the isosceles triangles forming the bottom of the unfolded cup are replaced by curved grooves 24 of the same curvature situated either externally as indicated in FIG. 4, or internally, at the triangles of vertices 23.25.26.
Selon l'autre variante de la figure 5, les rainages 24 de la figure 4 sont remplacés par quatre rainages 27 formés d'une succession de segments de droite formant un polygone convexe ayant un axe de symétrie par rapport à la ligne joignant les sommets 28 et 29. Des rainagesAccording to the other variant of FIG. 5, the grooves 24 of FIG. 4 are replaced by four grooves 27 formed of a succession of straight lines forming a convex polygon having an axis of symmetry with respect to the line joining the vertices 28 and 29. Creases
31 et 32 passent par chaque couple de sommets symétriques 33 et 35 d'une part et 34 et 36 d'autre part. Ces rainages sent parallèles au rainage 30 médian. Dans la variante de la figure 6, on retrouve, en combinaison, les rainages 18 de la figure 1, ceux 31 et31 and 32 pass through each pair of symmetrical vertices 33 and 35 on the one hand and 34 and 36 on the other. These grooves feel parallel to the central groove 30. In the variant of FIG. 6, we find, in combination, the grooves 18 of FIG. 1, those 31 and
32 de la figure 5 para-lèles au rainage médian 30 et les zones en forme de losange 14. De part et d'autre de l'axe médian transversal 40 du flan sont créés, par rainages, deux petits triangles isocèles 41 inscrits, par leur petite base, entre les rainages parallèles 31 et 32, leur sommet rejoignant les zones en forme de losange 14. Deux rainages 42, passant par les sommets communs des triangles isocèles 41 et des losanges 14 et reliant les rainages parallèles 31 et 32, complètent l'ensemble.32 of FIG. 5 para-leles with the median creasing 30 and the diamond-shaped zones 14. On either side of the transverse median axis 40 of the blank are created, by creasing, two small isosceles triangles 41 inscribed, by their small base, between the parallel creasing 31 and 32, their apex joining the diamond-shaped zones 14. Two creasing 42, passing by the common vertices of the isosceles triangles 41 and the diamonds 14 and connecting the parallel grooves 31 and 32, complete the assembly.
On constate que les grands côtés du flan délimitant les bandes A avec les rainages 1, sont découpés suivant deux encoches 43 partant de l'axe médian transversal 40 et rejoignant des rainages transversaux 44 passant par les losanges 14.It can be seen that the long sides of the blank delimiting the strips A with the grooves 1, are cut along two notches 43 starting from the transverse median axis 40 and joining transverse grooves 44 passing through the diamonds 14.
Lorsque le gobelet ainsi obtenu est replié, il ne se distingue pas du gobelet replié représenté figure 3; en revanche, lorsqu'il est déplié, les parois latérales ne forment plus deux dièdres comme montré figure 2, mais deux polyèdres.When the cup thus obtained is folded, it is not distinguished from the folded cup shown in Figure 3; on the other hand, when it is unfolded, the side walls no longer form two dihedrons as shown in Figure 2, but two polyhedra.
La figure 7 représente le gobelet correspondant aux flans des figures 5 ou 6 dans lequel les parois latérales sont formées de deux trièdres 37 et 38. Le fond du gobelet ne forme plus un dièdre comme représenté figure 2, mais un polyèdre 39.FIG. 7 represents the cup corresponding to the blanks of FIGS. 5 or 6 in which the side walls are formed of two trihedrons 37 and 38. The bottom of the cup no longer forms a dihedral as shown in FIG. 2, but a polyhedron 39.
L'avantage de ces variantes est, d'une part de former un bord polygonal, par exemple hexagonal, où il est plus facile de boire et, d'autre part, de former un fond polygonal qui est partiellement plat pour faciliter l'agitation du liquide contenu avec une cuillère. The advantage of these variants is, on the one hand to form a polygonal edge, for example hexagonal, where it is easier to drink and, on the other hand, to form a polygonal bottom which is partially flat to facilitate agitation. liquid contained with a spoon.

Claims

RevendicationsClaims
1 - Gobelet dépliable obtenu par pliage d'une feuille plane rectangulaire allongée comprenant, parallèlement à la longueur, deux bordures de largeur A encadrant une zone de largeur B dans laquelle sont formées les parois latérales (21) du gobelet en forme de dièdre reliées par un fond convexe obtenu par pliage préalable des bordures de largeur A en forme de "W" , caractérisé en ce que le fond convexe est formé de deux triangles isocèles de sommets (4,5), (23) et (28,29) situés sur les rainages (1) délimitant les bordures de largeur A, ayant une base commune (9,30) de longueur C, inférieure à B, dont les extrémités (10,11), (25,26) et (33-36) sont chacunes d'elles communes à un sommet d'une zone en forme de losange (14), dont l'une des diagonales (15) est dans le prolongement de la base commune (9,30) des triangles et dont la déformation conduisant au repliage du losange (14) suivant l'une ou l'autre de ces diagonales (15) et (16), permet le dépliage et le repliage du gobelet.1 - Unfoldable cup obtained by folding an elongated rectangular flat sheet comprising, parallel to the length, two borders of width A framing a zone of width B in which the side walls (21) of the dihedral-shaped cup are formed, connected by a convex bottom obtained by folding the edges of width A in the shape of a "W" beforehand, characterized in that the convex bottom is formed by two isosceles triangles with vertices (4,5), (23) and (28,29) located on the grooves (1) delimiting the borders of width A, having a common base (9.30) of length C, less than B, the ends (10.11), (25.26) and (33-36) are each common to a vertex of a diamond-shaped area (14), one of the diagonals (15) of which is in line with the common base (9.30) of the triangles and whose deformation leading when the rhombus (14) is folded along one or other of these diagonals (15) and (16), allows unfolding and folding of the goblet.
2 - Gobelet suivant la revendication 1, caractérisé en ce que les losanges (14) sont repliés sur eux-mêmes suivant leur diagonale (16), lorsque le gobelet est déplié, si bien que les extrémités (10) et (11) de l'arête (9) viennent en butée sur les arêtes (2) des faces latérales (21). 3 - Gobelet suivant la revendication 1, caractérisé en ce que les losanges (14) sont repliés sur eux-mêmes suivant la diagonale (15), lorsque le gobelet est replié, si bien que lesdits triangles isocèles, formant les fonds, viennent se superposer, chacun d'eux étant inscrit à l'intérieur d'un pentagone formé des arêtes correspondant à deux rainages (18), à un côté (22) de chacun des deux losanges (14) et à la base commune (9).2 - Cup according to claim 1, characterized in that the diamonds (14) are folded back on themselves along their diagonal (16), when the cup is unfolded, so that the ends (10) and (11) of the 'edge (9) abuts on the edges (2) of the side faces (21). 3 - Cup according to claim 1, characterized in that the diamonds (14) are folded on themselves along the diagonal (15), when the cup is folded, so that said isosceles triangles, forming the funds, come to be superimposed , each of them being inscribed inside a pentagon formed of edges corresponding to two grooves (18), to one side (22) of each of the two diamonds (14) and to the common base (9).
4 - Gobelet suivant la revendication 1, caractérisé en ce que la diagonale (15) du losange (14) a une longueur D=(B-C)*0,707 et la diagonale (16) une longueur E=D/2. 5 - Gobelet suivant la revendication 3, caractérisé en ce que le dépliage du gobelet peut s'obtenir en appuyant sur les arêtes (2) des dièdres 21 afin de les rapprocher jusqu'à ce qu'elles viennent en butée sur les extrémités (10) et (11) de la base commune (9).4 - Cup according to claim 1, characterized in that the diagonal (15) of the rhombus (14) has a length D = (BC) * 0.707 and the diagonal (16) a length E = D / 2. 5 - Cup according to claim 3, characterized in that the unfolding of the cup can be obtained by pressing on the edges (2) of the dihedrons 21 in order to bring them together until they come into abutment on the ends (10 ) and (11) of the common base (9).
6 - Gobelet suivant l'une quelconque des revendications précédentes, caractérisé en ce que les rainages rectilignes des triangles formant le fond sont remplacés par des rainages courbes (24) joignant les sommets (23) aux sommets (25) et (26) des triangles isocèles.6 - Cup according to any one of the preceding claims, characterized in that the straight grooves of the triangles forming the bottom are replaced by curved grooves (24) joining the vertices (23) to the vertices (25) and (26) of the triangles isosceles.
7 - Gobelet suivant l'une quelconque des revendications précédentes, caractérisé en ce que les rainages courbes (24) sont remplacés par quatre rainages (27) formant un polygone convexe ayant un axe de symétrie par rapport à une ligne joignant les sommets (28) et (29) et en ce que des rainages (31) et (32) passant par chaque couple des sommets symétriques (33,35) et (34,36) sont parallèles à un rainage médian (30) de manière que, lorsque le gobelet est déplié, les parois latérales (38) et le fond (39),forment des polyèdres.7 - Cup according to any one of the preceding claims, characterized in that the curved grooves (24) are replaced by four grooves (27) forming a convex polygon having an axis of symmetry with respect to a line joining the vertices (28) and (29) and in that grooves (31) and (32) passing through each pair of symmetrical vertices (33,35) and (34,36) are parallel to a median groove (30) so that, when the cup is unfolded, the side walls (38) and the bottom (39) form polyhedra.
8 - Gobelet suivant les revendications 1 et 7, caractérisé en ce que sont créés, par rainages, deux petits triangles isocèles (41) inscrits entre les rainages parallèles (31,32) rejoignant les losanges (14) et en ce que les grands côtés du flan délimitant les bordures A avec les rainages (1) sont découpés par des encoches (43) situées de part et d'autre de l'axe médian (40) et de rainages transversaux (44) passant par les losanges (14) de manière que, lorsque le gobelet est déplié, les parois latérales (38) et le fond (39) forment des polyèdres.8 - Cup according to claims 1 and 7, characterized in that are created, by creasing, two small isosceles triangles (41) inscribed between the parallel creases (31,32) joining the diamonds (14) and in that the long sides the blank defining the edges A with the grooves (1) are cut by notches (43) located on either side of the median axis (40) and transverse grooves (44) passing through the diamonds (14) of so that, when the cup is unfolded, the side walls (38) and the bottom (39) form polyhedra.
9 - Gobelet suivant l'une quelconque des revendications précédentes, caractérisé en ce que le gobelet est réalisé à partir d'une feuille de carton comportant sur une face une couche de matériau étanche et thermosoudable. 9 - Cup according to any one of the preceding claims, characterized in that the cup is made from a sheet of cardboard having on one side a layer of waterproof and heat-sealable material.
EP95921870A 1994-06-02 1995-06-01 Foldable cup with a prefolded convex base Withdrawn EP0760783A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9406969A FR2720719B1 (en) 1994-06-02 1994-06-02 Foldable cup with pre-folded convex bottom.
FR9406969 1994-06-02
PCT/FR1995/000712 WO1995033654A1 (en) 1994-06-02 1995-06-01 Foldable cup with a prefolded convex base

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EP0760783A1 true EP0760783A1 (en) 1997-03-12

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EP95921870A Withdrawn EP0760783A1 (en) 1994-06-02 1995-06-01 Foldable cup with a prefolded convex base

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US (1) US5799863A (en)
EP (1) EP0760783A1 (en)
JP (1) JPH10500927A (en)
AU (1) AU2676295A (en)
FR (1) FR2720719B1 (en)
WO (1) WO1995033654A1 (en)

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WO1995033654A1 (en) 1995-12-14
FR2720719B1 (en) 1996-07-05
FR2720719A1 (en) 1995-12-08
AU2676295A (en) 1996-01-04
JPH10500927A (en) 1998-01-27
US5799863A (en) 1998-09-01

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