EP0057644A2 - Easily openable package e.g. for foodstuff in paste form - Google Patents

Easily openable package e.g. for foodstuff in paste form Download PDF

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Publication number
EP0057644A2
EP0057644A2 EP82400170A EP82400170A EP0057644A2 EP 0057644 A2 EP0057644 A2 EP 0057644A2 EP 82400170 A EP82400170 A EP 82400170A EP 82400170 A EP82400170 A EP 82400170A EP 0057644 A2 EP0057644 A2 EP 0057644A2
Authority
EP
European Patent Office
Prior art keywords
sheet
tongue
packaging
face
heat
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.)
Granted
Application number
EP82400170A
Other languages
German (de)
French (fr)
Other versions
EP0057644A3 (en
EP0057644B1 (en
Inventor
Marcel Aimé René Guyonnet
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.)
Societe Anonyme des Fermiers Reunis SAFR
Original Assignee
Societe Anonyme des Fermiers Reunis SAFR
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.)
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Publication date
Application filed by Societe Anonyme des Fermiers Reunis SAFR filed Critical Societe Anonyme des Fermiers Reunis SAFR
Publication of EP0057644A2 publication Critical patent/EP0057644A2/en
Publication of EP0057644A3 publication Critical patent/EP0057644A3/en
Application granted granted Critical
Publication of EP0057644B1 publication Critical patent/EP0057644B1/en
Expired 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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5827—Tear-lines provided in a wall portion
    • B65D75/5833—Tear-lines provided in a wall portion for tearing out a portion of the wall
    • 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
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
    • B65D85/72—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for for edible or potable liquids, semiliquids, or plastic or pasty materials
    • B65D85/76—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for for edible or potable liquids, semiliquids, or plastic or pasty materials for cheese

Definitions

  • the invention relates to a tight packaging packaging with easy opening for pasty products, in particular for food products such as processed cheese or semi-salt, composed of two thin sheets, namely a first sheet, cut according to an appropriate contour and shaped in shell by folding so as to reveal the bottom and the lateral faces of the packaging, and a second sheet forming a cover, cut to the dimensions of said bottom and placed flat on the surface of the product to be conditioned previously placed in said shell.
  • the parties. of the first sheet forming said side faces are extended by flanges which are folded down and heat-sealed on the edges of the second sheet, the inner sides of the first sheet respectively and the outer sides of the second sheet being coated for this purpose with a heat-sealable lacquer .
  • a portion of the first sheet, comprising the bottom and at least one side face constitutes a wide opening strip which must tear along the fold lines bordering said side face and the bottom by pulling on a tongue formed by the edge of this last lateral face, wider than the other edges.
  • the object of the invention is to remedy this drawback and to arrange the packaging considered so as to ensure perfect separation of the opening strip and complete "undressing" of the product contained in the packaging.
  • This object is achieved by providing, along the fold lines which laterally delimit the opening strip of the packaging, reinforcing strips adhering to the first sheet in which this strip is taken and guiding the progression of the tear during the opening of the packaging, these reinforcing strips, considered on the first sheet before folding thereof, being rectilinear and each of them extending on one side over at least part of the opposite side face to the pull tab and on the other side to a part of the enlarged flange forming said tab, so that the reinforcement strips, which extend parallel or substantially parallel to each other over most of their length, are directed towards each other over the rest of their length - after folding the first sheet - by end portions belonging to the tongue and along the fold line located at the foot thereof.
  • the opening of the packaging is carried out along a double tearing path, starting from the center of the foot of the tongue, diverging towards the lateral edges of the face adjacent to the tongue, then along these lateral edges and then those of 'a second side (the bottom of the packaging) and a third side (opposite the first).
  • the opening is therefore complete and leaves no retention corner of the packaged product.
  • the width of the widened rim is such that between the two folded corners of the tab remain uncovered heat sealable portions of the first sheet and the second sheet facing.
  • the width of the widened rim is such that between the two folded corners of the tab remain uncovered heat sealable portions of the first sheet and the second sheet facing.
  • the enlarged rim is additionally enlarged in a central part of its border, over a length less than the width of the opening strip, so that the entire surface of the pull tab is covered by the folded corners, with the sole exception of the above heat-sealable portions ,. these being delimited by a small window defined by the terminal notches appearing at the corners of said rim due to the presence of said enlarged central part.
  • the pull tab remains free over most of its surface, being welded to the second sheet only inside said window, located in the middle of its base, this welding sufficient sealing in this region of the package.
  • the reinforcing strips of a package according to the invention can advantageously be heat-sealed on the first sheet.
  • fracture initiators in the widened edge forming the pull tab, substantially at the end of the fold lines along which the reinforcing strips .
  • These fracture initiators can be constituted by short notches punched in the edge of said enlarged rim with the same orientation as the fold lines corresponding on this rim to the reinforcing strips.
  • the reinforcement strips are preferably arranged on this sheet so as to leave small margins between their outer edges and the corresponding fold lines.
  • the invention is applicable to packages of prismatic shape having a base (corresponding to the above-mentioned bottom) rectangular, triangular or in the shape of a circular sector.
  • a packaging package according to the invention is formed of a first sheet 1 (Figure 1) and a second sheet 2 (shown in gray in Figures 2 and 3). These are thin aluminum sheets.
  • the sheet 1 is shaped, by folding along the lines embossed in fine lines in FIG. 1, into a shell comprising a rectangular bottom 3 and lateral faces 4, 5, 6 and 7 also rectangular, rising perpendicular to the plane of the bottom 3 , to which edges 8, 9, 10, 11 are marginally connected, the corner folds appearing between the adjacent side faces being folded against the side faces 5 and 7 and their edges 9 and 11.
  • a determined quantity of cheese 34 (Gruyère paste or semi-salt, for example) on an equal height at the height h of the lateral faces 4, 5, 6 and 7.
  • the second sheet 2 On the surface of the cheese is deposited the second sheet 2, of dimensions identical to those of the bottom 3, on which the edges 8, 9, 10, 11 are folded down.
  • edges are welded on the periphery of the sheet 2, over their entire length, except for one of the edges, namely the one which bears the reference 8, where the weld is limited to its central region, as will be seen below. .
  • the outer face of the latter and the inner face of the sheet 1 are coated with a heat-sealable lacquer.
  • the rim 8 is wider than 1 B others.
  • its corners are folded down by folding along lines 12, 13 oblique at 45 °.
  • a triangular tongue 15 is formed, by means of which the package can be opened.
  • this tongue By effecting a pull on this tongue (arrow 16), it is possible to tear off, along a double tear line corresponding to the folds 17 and 18 located between the side faces 5 and 7 and the bottom 3 and their extensions s extending on either side of the side face 4, of the rim 8 and possibly of the side face 6, a wide opening strip 19 taken from the sheet 1 and formed by the tongue 15, from the side face 4, of the bottom 3 and possibly of a part of the lateral face 6.
  • two narrow reinforcing strips 20, 21 are welded on the inner face of the sheet 1 along the aforesaid folds 17, 18 and their extensions.
  • Opposite the corresponding ends of the strips 20, 21 are provided in the flange 8 two notches 22, 23 coinciding with the extensions of the folds 17, 18 and forming two tear caps which facilitate the start of the separation of the opening strip 19 along the outer edge of the reinforcing strips 20, 21.
  • the bands 20, 21 initially rectilinear (FIG. 1) form, on the side of the tongue 15, two successive right angles so that they extend parallel to each other, then direct towards each other by end portions belonging to the tongue 15 and along the fold line 24 which is located at the foot thereof and on which the tear caps 22, 23 are located, between the ends of the bands 20, 21.
  • These act as guide bands for the progression of the tear lines (FIG. 3) firstly along the aforementioned fold line 24, then along lines 25, 26 bordering the side face 4, then along lines 17, 18 and finally optionally along lines 27, 28 bordering the opposite side face 6, so as to provide wide access to the cheese 34 contained in the packaging.
  • FIGS. 2 and 3 show the theoretically ideal arrangement of the reinforcement strips 20, 21 according to which the outer edges of the latter coincide with the folds 17, 18 and their extensions, like the initiations 22, 23. But in practice it is necessary to take account of the manufacturing tolerances affecting the positioning of the strips 20, 21. So that they never have an unfavorable position relative to the primers 22, 23 ,. they should be shifted slightly towards each other, as shown in Figure 1, providing a small margin d between their outer edges and the corresponding folds.
  • the width a of the lateral parts of the rim 8 is less than half the width b of the bottom 3, so that after folding there remain uncovered central portions of the sheet 2, at 29, and of the tongue 15, at 30, allowing the latter to locally weld to said sheet 2.
  • the central part 31 of the rim 8 has for its part a width c greater than a and equal to half of the aforementioned width b, which is also the width of the opening strip 19, and this over a length e a little less than b so as to reveal notches 32, 33 defining, after folding, the extent of the welding window 30, outside of which the triangular folded corners, which meet exactly along a median line 14, cover the entire inner face of the pull tab 15, preventing its sealing so as to ensure easy gripping thereof ci for opening the package.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
  • Packages (AREA)

Abstract

1. Easily openable airtight package for products in paste form, particularly for foodstuffs such as soft or slightly-salted cheese comprising two thin sheets, namely a first sheet (1) cut to an appropriate shape and made into tray form by folding in such a way as to produce the bottom (3) and the side faces (4-7) of the package, and a second sheet (2) cut to the dimensions of the said bottom and placed flat on the surface of the product previously placed in the said tray, wherein the parts of the first sheet which form the said side faces are extended to form marginal flaps (8-11) which are pressed down and heat-sealed on to the margins of the second sheet, the internal face of the first sheet and the external face of the second sheet being coated for this purpose with a heat-sealable lacquer, and wherein a portion of the first sheet, forming the bottom (3) and at least one side face (4), constitutes a wide opening strip (19) which is intended to tear along the folds (17, 18) bordering the said side face and the bottom by bulling on a small tongue (15) formed by the flap (8), larger than the other flaps, of that last side face (4), the corners of said larger flap being folded down along oblique fold lines (12, 13) in such a manner that the small tongue adopts a generally triangular shape and in such a manner that it is the external face, not coated with heat-sealable lacquer, of that part of the first sheet which forms the said tongue which comes into contact with the external face of the second sheet, characterised in that along the fold lines which laterally define the tear-open strip (19) of the package there are provided, adhering to the first sheet (1) of which that strip forms a part, reinforcing strips (20, 21) which guide the progression of the tearing at the time of opening of the package, these reinforcing strips (20, 21) in that they are provided on the first sheet (1) being folded with the latter, being rectangular and each extending on the one side on to a part at least of the side face (6) which is opposite the tongue (15) and on the other side as far as a part of the larger flap (8) forming the said tongue, so that the reinforcing strips, which extend parallel or substantially parallel to each other over the major part of their length, are directed towards each other over the rest of their length - after folding of the first sheet (1) - by virtue of their end portions which belong to the tongue (15) and extend along the fold line (24) located at the foot of the latter.

Description

L'invention se rapporte à un emballage de conditionnement étanche à ouverture facile pour produits pâteux, en particulier pour produits alimentaires tels que fromages fondus ou demi-sel, composé de deux feuilles minces, savoir une première feuille, découpée suivant un contour approprié et conformée en coquille par pliage de manière à faire apparaître le fond et les faces latérales de l'emballage, et une deuxième feuille formant couvercle, découpée aux dimensions dudit fond et posée à plat sur la surface du produit à conditionner préalablement placé dans ladite coquille.The invention relates to a tight packaging packaging with easy opening for pasty products, in particular for food products such as processed cheese or semi-salt, composed of two thin sheets, namely a first sheet, cut according to an appropriate contour and shaped in shell by folding so as to reveal the bottom and the lateral faces of the packaging, and a second sheet forming a cover, cut to the dimensions of said bottom and placed flat on the surface of the product to be conditioned previously placed in said shell.

Dans un emballage du genre considéré, les parties . de la première feuille formant lesdites faces latérales se prolongent par des rebords qui sont rabattus et thermosoudés sur les bords de la deuxième feuille, les faces respectivement intérieure de la première feuille et extérieure de la deuxième feuille étant revêtues à cet effet d'une laque thermosoudable. D'autre part, une portion de la première feuille, comprenant le fond et au moins une face latérale, constitue une bande d'ouverture large qui doit se déchirer le long des lignes de pliage bordant ladite face latérale et le fond par traction sur une languette constituée par le rebord de cette dernière face latérale, plus large que les autres rebords. Les coins de ce rebord élargi sont rabattus suivant deslJignes de pliage obliques de manière que la languette de traction prenne une forme générale triangulaire et que ce soit la face extérieure, non revêtue de laque thermosoudable, de la partie de la première feuille formant ladite languette qui vienne en contact avec la face extérieure de la deuxième feuille.In a packaging of the kind considered, the parties. of the first sheet forming said side faces are extended by flanges which are folded down and heat-sealed on the edges of the second sheet, the inner sides of the first sheet respectively and the outer sides of the second sheet being coated for this purpose with a heat-sealable lacquer . On the other hand, a portion of the first sheet, comprising the bottom and at least one side face, constitutes a wide opening strip which must tear along the fold lines bordering said side face and the bottom by pulling on a tongue formed by the edge of this last lateral face, wider than the other edges. The corners of this enlarged rim are folded along oblique fold lines so that the pull tab takes a generally triangular shape and that it is the outer face, not coated with heat-sealable lacquer, of the part of the first sheet forming said tab which comes into contact with the outside of the second sheet.

Lorsqu'on tire cette languette pour obtenir l'ouverture d'un emballage ainsi constitué, on constate bien souvent que la séparation de la bande large précitée s'effectue de façon défectueuse. Par exemple, les déchirures délimitant cette bande progressent non pas parallèlement entre elles le long des lignes de pliage qu'elles devraient suivre, mais en convergeant l'une vers l'autre, ce qui donne naissance à une bande d'ouverture effilée en V et trop courte, le produit étant ainsi mal libéré et son extraction de l'emballage rendue fort difficile.When this tab is pulled to obtain the opening of a package thus formed, it is very often found that the separation of the aforementioned wide strip takes place in a defective manner. For example, the tears delimiting this strip progress not parallel between they along the fold lines they should follow, but converging towards each other, which gives rise to a tapered opening band which is too short, the product being thus badly released and its extraction packaging made very difficult.

L'invention a pour but de remédier à cet inconvénient et d'aménager l'emballage considéré de manière à assurer une séparation parfaite de la bande d'ouverture et un "déshabillage" complet du produit contenu dans l'emballage.The object of the invention is to remedy this drawback and to arrange the packaging considered so as to ensure perfect separation of the opening strip and complete "undressing" of the product contained in the packaging.

Ce but est atteint en prévoyant, le long des lignes de pliage qui délimitent latéralement la bande d'ouverture de l'emballage, des bandes de renfort adhérant à la première feuille dans laquelle est prise cette bande et guidant la progression de la déchirure lors de l'ouverture de l'emballage, ces bandes de renfort, considérées sur la première feuille avant pliage de celle-ci, étant rectilignes et chacune d'elles s'étendant d'un côté sur une partie au moins de.la face latérale opposée à la languette de traction et de l'autre côté jusque sur une partie du rebord élargi formant ladite languette, de sorte que les bandes de renfort, qui s'étendent parallèlement ou sensiblement parallèlement entre elles sur la majeure partie de leur longueur, se dirigent l'une vers l'autre sur le reste de leur longueur - après pliage de la première feuille- par des portions terminales appartenant à la languette et longeant la ligne de pliage située au pied de celle-ci. Ainsi, l'ouverture de l'emballage s'effectue suivant un double chemin de déchirage, partant du centre du pied de la languette en divergeant vers les arêtes latérales de la face adjacente à la languette, puis suivant ces arêtes latérales et ensuite celles d'une deuxième face (le fond de l'emballage) et d'une troisième face (opposée à la première). L'ouverture est par conséquent complète et ne laisse subsister aucun coin de rétention du produit emballé.This object is achieved by providing, along the fold lines which laterally delimit the opening strip of the packaging, reinforcing strips adhering to the first sheet in which this strip is taken and guiding the progression of the tear during the opening of the packaging, these reinforcing strips, considered on the first sheet before folding thereof, being rectilinear and each of them extending on one side over at least part of the opposite side face to the pull tab and on the other side to a part of the enlarged flange forming said tab, so that the reinforcement strips, which extend parallel or substantially parallel to each other over most of their length, are directed towards each other over the rest of their length - after folding the first sheet - by end portions belonging to the tongue and along the fold line located at the foot thereof. Thus, the opening of the packaging is carried out along a double tearing path, starting from the center of the foot of the tongue, diverging towards the lateral edges of the face adjacent to the tongue, then along these lateral edges and then those of 'a second side (the bottom of the packaging) and a third side (opposite the first). The opening is therefore complete and leaves no retention corner of the packaged product.

Dans un emballage selon l'invention, on peut prévoir que, d'une manière connue, la largeur du rebord élargi soit telle qu'entre les deux coins rabattus de la languette restent découvertes des portions thermosoudables de la première feuille et de la deuxième feuille en regard. Or, on a constaté que, lorsque ces portions s'étendent jusqu'à la pointe de la languette, celle-ci risque fort de se trouver soudée de sa base à son extrémité sur la deuxième feuille, en raison de l'échauffement dû au produit coulé à chaud, de sorte qu'il est difficile de la saisir pour arracher la bande d'ouverture. C'est pourquoi, selon une autre caractéristique de l'invention, le rebord élargi est complémentairement élargi en une partie centrale de sa bordure, sur une longueur inférieure à la largeur de la bande d'ouverture, de manière que la surface entière de la languette de traction soit recouverte par les coins rabattus, à la seule exception des portions thermosoudables précitées,. celles-ci étant délimitées par une petite fenêtre définie par les encoches terminales apparaissant aux angles dudit rebord du fait de la présence de ladite partie centrale élargie. De cette manière, on est sûr que la languette de traction reste libre sur la majeure partie de sa surface, n'étant soudée à la deuxième feuille qu'à l'intérieur de ladite fenêtre, située au milieu de sa base, cette soudure suffisant à assurer l'étanchéité dans cette région de l'emballage.In a package according to the invention, it can be provided that, in a known manner, the width of the widened rim is such that between the two folded corners of the tab remain uncovered heat sealable portions of the first sheet and the second sheet facing. However, it has been found that, when these portions extend to the tip of the tongue, it is very likely to be welded from its base to its end on the second sheet, due to the heating due to hot poured product, so it is difficult to grip it to tear off the opening strip. This is why, according to another characteristic of the invention, the enlarged rim is additionally enlarged in a central part of its border, over a length less than the width of the opening strip, so that the entire surface of the pull tab is covered by the folded corners, with the sole exception of the above heat-sealable portions ,. these being delimited by a small window defined by the terminal notches appearing at the corners of said rim due to the presence of said enlarged central part. In this way, it is certain that the pull tab remains free over most of its surface, being welded to the second sheet only inside said window, located in the middle of its base, this welding sufficient sealing in this region of the package.

Les bandes de renfort d'un emballage selon l'invention peuvent avantageusement être thermosoudées sur la première feuille.The reinforcing strips of a package according to the invention can advantageously be heat-sealed on the first sheet.

Pour imposer à la bande d'ouverture de commencer à se déchirer aux endroits voulus, il convient de prévoir des amorces de rupture dans le rebord élargi formant la languette de traction, sensiblement à l'extrémité des lignes de pliage que longent les bandes de renfort. Ces amorces de rupture peuvent être constituées par de courtes entailles poinçonnées dans la bordure dudit rebord élargi avec la même orientation que les lignes de pliage correspondant sur ce rebord aux bandes de renfort.To force the opening strip to start tearing in the desired places, it is advisable to provide fracture initiators in the widened edge forming the pull tab, substantially at the end of the fold lines along which the reinforcing strips . These fracture initiators can be constituted by short notches punched in the edge of said enlarged rim with the same orientation as the fold lines corresponding on this rim to the reinforcing strips.

Afin d'assurer que les lignes de déchirure, commençant aux amorces de rupture, atteignent correctement le début des bandes de renfort qui les guideront ensuite jusqu'à la fin de l'opération d'ouverture, et cela malgré les tolérances de fabrication concernant la position desdites bandes sur la première feuille de l'emballage, les bandes de renfort sont de préférence disposées sur cette feuille de manière à laisser de petites marges entre leurs lisières extérieures et les lignes de pliage correspondantes.To ensure that the tear lines, starting at the beginning of the break, correctly reach the beginning of the reinforcement strips which will then guide them until the end of the opening operation, and this despite the manufacturing tolerances concerning the position of said strips on the first sheet of the packaging, the reinforcement strips are preferably arranged on this sheet so as to leave small margins between their outer edges and the corresponding fold lines.

L'inention est applicable aux emballages de forme prismatique ayant une base (correspondant au fond précité) rectangulaire, triangulaire ou en forme de secteur circulaire.The invention is applicable to packages of prismatic shape having a base (corresponding to the above-mentioned bottom) rectangular, triangular or in the shape of a circular sector.

La description qui va suivre, en regard des dessins annexés à titre d'exemple non limitatif, permettra de bien comprendre comment la présente invention peut être mise en pratique.The description which follows, with reference to the accompanying drawings by way of nonlimiting example, will make it possible to understand clearly how the present invention can be put into practice.

  • La figure 1 représente la première feuille d'un emballage selon l'invention, disposée à plat avant son pliage en coquille.FIG. 1 represents the first sheet of a package according to the invention, placed flat before its folding into a shell.
  • La figure 2 représente en perspective l'emballage achevé confectionné par pliage et soudage dela première et de la deuxième feuille.2 shows in perspective the completed packaging made by folding and welding the first and the second sheet.
  • La figure 3 représente l'emballage de la figure 2 en cours d'ouverture.Figure 3 shows the packaging of Figure 2 being opened.

Un emballage de conditionnement selon l'invention est formé d'une première feuille 1 (figure 1) et d'une deuxième feuille 2 (représentée en grisé sur les figures 2 et 3). Il s'agit de feuilles minces en aluminium.A packaging package according to the invention is formed of a first sheet 1 (Figure 1) and a second sheet 2 (shown in gray in Figures 2 and 3). These are thin aluminum sheets.

La feuille 1 est conformée, par pliage suivant les lignestracées en traits fins sur la figure 1, en une coquille comportant un fond 3 rectangulaire et des faces latérales 4, 5, 6 et 7 également rectangulaires,s'élevant perpendiculairement au plan du fond 3, auxquelles se raccordent marginalement des rebords 8, 9, 10, 11, les plis d'angles apparaissant entre les faces latérales adjacentes étant rabattus contre les faces latérales 5 et 7 et leurs rebords 9 et 11. Dans la coquille ainsi formée est coulée à chaud une quantité déterminée de fromage 34 (pâte de gruyère ou demi-sel, par exemple) sur une hauteur égale à la hauteur h des faces latérales 4, 5, 6 et 7. A la surface du fromage est déposée la deuxième feuille 2, de dimensions identiques à celles du fond 3, sur laquelle sont rabattus les rebords 8, 9, 10, 11. Puis ces rebords sont soudés sur le pourtour de la feuille 2, sur toute leur longueur, sauf pour l'un des rebords, savoir celui qui porte la référence 8, où la soudure se limite à sa région centrale, comme on le verra plus loin. Pour permettre le soudage des rebords sur la feuille 2, la face extérieure de celle-ci et la face intérieure de la feuille 1 sont revêtues d'une laque thermosoudable.The sheet 1 is shaped, by folding along the lines embossed in fine lines in FIG. 1, into a shell comprising a rectangular bottom 3 and lateral faces 4, 5, 6 and 7 also rectangular, rising perpendicular to the plane of the bottom 3 , to which edges 8, 9, 10, 11 are marginally connected, the corner folds appearing between the adjacent side faces being folded against the side faces 5 and 7 and their edges 9 and 11. In the shell thus formed is poured at hot a determined quantity of cheese 34 (Gruyère paste or semi-salt, for example) on an equal height at the height h of the lateral faces 4, 5, 6 and 7. On the surface of the cheese is deposited the second sheet 2, of dimensions identical to those of the bottom 3, on which the edges 8, 9, 10, 11 are folded down. Then these edges are welded on the periphery of the sheet 2, over their entire length, except for one of the edges, namely the one which bears the reference 8, where the weld is limited to its central region, as will be seen below. . To allow the welding of the edges on the sheet 2, the outer face of the latter and the inner face of the sheet 1 are coated with a heat-sealable lacquer.

Comme on le voit sur les figures, le rebord 8 est plus large que 1B autres. Lorsque les autres rebords sont rabattus sur la feuille 2, ses coins se rabattent par pliage suivant des lignes 12, 13 obliques à 45°. Ainsi est formée une languette triangulaire 15, grâce à laquelle l'emballage peut être ouvert. En effectuant en effet une traction sur cette languette (flèche 16), il est possible d'arracher, suivant une double ligne de déchirure correspondant aux plis 17 et 18 situés entre les faces latérales 5 et 7 et le fond 3 et à leurs prolongements s'étendant de part et d'autre de la face latérale 4, du rebord 8 et éventuellement de la face latérale 6, une large bande d'ouverture 19 prélevée sur la feuille 1 et formée de la languette 15, de la face latérale 4, du fond 3 et éventuellement d'une partie de la face latérale 6.As seen in the figures, the rim 8 is wider than 1 B others. When the other edges are folded over the sheet 2, its corners are folded down by folding along lines 12, 13 oblique at 45 °. Thus a triangular tongue 15 is formed, by means of which the package can be opened. By effecting a pull on this tongue (arrow 16), it is possible to tear off, along a double tear line corresponding to the folds 17 and 18 located between the side faces 5 and 7 and the bottom 3 and their extensions s extending on either side of the side face 4, of the rim 8 and possibly of the side face 6, a wide opening strip 19 taken from the sheet 1 and formed by the tongue 15, from the side face 4, of the bottom 3 and possibly of a part of the lateral face 6.

Afin d'obtenir un arrachement parfait de la bande 19, sur une largeur constante correspondant à la largeur b du fond 3, deux étroites bandes derenfort 20, 21 sont soudées sur la face intérieure de la feuille 1 le long des plis 17, 18 précités et de leurs prolongements. Ces bandes 20, 21, rectilignes sur la feuille 1 dans son état initial à plat, courent sur le rebord 8, les faces latérales 4 et 6 et le fond 3. Elles s'arrêtent à quelque distance de la limite extrême du rebord 8. En regard des extrémités correspondantes des bandes 20, 21 sont prévues dans le rebord 8 deux entailles 22, 23 coïncidant avec les prolongements des plis 17, 18 et formant deux amorces de déchirure qui facilitent le début de la séparation de la bande d'ouverture 19 suivant la lisière extérieure des bandes de renfort 20, 21.In order to obtain a perfect tearing of the strip 19, over a constant width corresponding to the width b of the bottom 3, two narrow reinforcing strips 20, 21 are welded on the inner face of the sheet 1 along the aforesaid folds 17, 18 and their extensions. These bands 20, 21, rectilinear on the sheet 1 in its initial flat state, run over the rim 8, the lateral faces 4 and 6 and the bottom 3. They stop at some distance from the extreme limit of the rim 8. Opposite the corresponding ends of the strips 20, 21 are provided in the flange 8 two notches 22, 23 coinciding with the extensions of the folds 17, 18 and forming two tear caps which facilitate the start of the separation of the opening strip 19 along the outer edge of the reinforcing strips 20, 21.

On voit sur la figure 2 que, après pliage, les bandes 20, 21 initialement rectilignes (figure 1) forment, du côté de la languette 15, deux angles droits successifs de telle manière qu'elles s'étendent parallèlement entre elles, puis se dirigent l'une vers l'autre par des portions terminales appartenant à la languette 15 et longeant la ligne de pliage 24 qui est située au pied de celle-ci et sur laquelle se trouvent les amorces de déchirure 22, 23, entre les extrémités des bandes 20, 21. Ces dernières font leur office de bandes de guidage pour la progression des lignes de déchirure (figure 3) tout d'abord suivant la ligne de pliage 24 précitée, puis suivant les lignes 25, 26 bordant la face latérale 4, puis suivant les lignes 17, 18 et enfin éventuellement suivant les lignes 27, 28 bordant la face latérale 6 opposée, de manière à procurer un large accès au fromage 34 contenu dans l'emballage.It can be seen in FIG. 2 that, after folding, the bands 20, 21 initially rectilinear (FIG. 1) form, on the side of the tongue 15, two successive right angles so that they extend parallel to each other, then direct towards each other by end portions belonging to the tongue 15 and along the fold line 24 which is located at the foot thereof and on which the tear caps 22, 23 are located, between the ends of the bands 20, 21. These act as guide bands for the progression of the tear lines (FIG. 3) firstly along the aforementioned fold line 24, then along lines 25, 26 bordering the side face 4, then along lines 17, 18 and finally optionally along lines 27, 28 bordering the opposite side face 6, so as to provide wide access to the cheese 34 contained in the packaging.

On a représenté sur les figures 2 et 3 la disposition théoriquement idéale des bandes de renfort 20, 21 selon laquelle les lisières extérieures de celles-ci coïncident avec les plis 17, 18 et leurs prolongements, comme les amorces de rupture 22, 23. Mais en pratique il y a lieu de tenir compte des tolérances de fabrication affectant le positionnement des bandes 20, 21. Afin qu'elles ne présentent jamais une position défavorable par rapport aux amorces 22, 23,. il convient de les décaler légèrement l'une vers l'autre, comme représenté à la figure 1, en prévoyant une petite marge d entre leurs lisières extérieures et les plis correspondants.FIGS. 2 and 3 show the theoretically ideal arrangement of the reinforcement strips 20, 21 according to which the outer edges of the latter coincide with the folds 17, 18 and their extensions, like the initiations 22, 23. But in practice it is necessary to take account of the manufacturing tolerances affecting the positioning of the strips 20, 21. So that they never have an unfavorable position relative to the primers 22, 23 ,. they should be shifted slightly towards each other, as shown in Figure 1, providing a small margin d between their outer edges and the corresponding folds.

La largeur a des parties latérales du rebord 8 est inférieure à la moitié de la largeur b du fond 3, de manière qu'après pliage subsistent des portions centrales découvertes de la feuille 2, en 29, et de la languette 15, en 30, permettant à cette dernière de se souder localement à ladite feuille 2. La partie centrale 31 du rebord 8 a pour sa part une largeur c supérieure à a et égale à la moitié de la largeur b précitée, qui est aussi la largeur de la bande d'ouverture 19, et cela sur une longueur e un peu inférieure à b de manière à faire apparaître des encoches 32, 33 définissant, après pliage, l'étendue de la fenêtre de soudage 30, en dehors de laquelle les coins rabattus en triangle, qui se rejoignent exactement suivant une ligne médiane 14, recouvrent toute la face intérieure de la languette de traction 15, empêchant son scellement de façon à assurer une saisie aisée de celle-ci pour l'ouverture de l'emballage.The width a of the lateral parts of the rim 8 is less than half the width b of the bottom 3, so that after folding there remain uncovered central portions of the sheet 2, at 29, and of the tongue 15, at 30, allowing the latter to locally weld to said sheet 2. The central part 31 of the rim 8 has for its part a width c greater than a and equal to half of the aforementioned width b, which is also the width of the opening strip 19, and this over a length e a little less than b so as to reveal notches 32, 33 defining, after folding, the extent of the welding window 30, outside of which the triangular folded corners, which meet exactly along a median line 14, cover the entire inner face of the pull tab 15, preventing its sealing so as to ensure easy gripping thereof ci for opening the package.

Claims (9)

1.- Emballage de conditionnement étanche à ouverture facile pour produits pâteux, en particulier pour produits alimentaires tels que fromages fondus ou demi-sel, composé de deux feuilles minces, savoir une première feuille découpée suivant un contour approprié et conformée en coquille par pliage de macère à faire apparaître le fond et les faces latérales de l'emballage, et une deuxième feuille découpée aux dimensions dudit fond et posée à plat sur la surface du produit à conditionner préalablement placé dans ladite coquille, tandis que les parties de la première feuille formant lesdites faces latérales se prolongent par des rebords qui sont rabattus et thermosoudés sur les bords de la deuxième feuille, les faces respectivement intérieure de la première feuille et extérieure de la deuxième feuille étant revêtues à cet effet d'une laque thermosoudable, et qu'une portion de la première feuille, comprenant le fond et au moins une face latérale, constitue une bande d'ouverture large qui doit se déchirer le 10 g des lignes depliage bordant ladite face latérale et le fond par traction sur une languette constituée parle rebord de cette dernière face latérale, plus large que les autres rebords, les coins de ce rebord élargi é ant rabattus suivant des lignes de pliage obliques de manière que la languette de traction prenne une forme générale triangulaire et que ce soit la face extérieure, non revêtue de laque thermosoudable, de la partie de la première feuille formant ladite languette qui vienne en contact avec la face extérieure de la deuxième feuille, caractérisé par le fait que le long des lignes de pliage qui délimitent latéralement la bande d'ouverture (19) de l'emballage sont prévues, adhérant à la première feuille (1) dans laquelle est prise cette bande, des bandes de renfort (20, 21) guidant la progression de la déchirure lors de l'ouverture de l'emballage, ces bandes de renfort (20, 21), considérées sur la première feuille (1) avant pliage de celle-ci, étant rectilignes et chacune d'elle s s'étendant d'un côté sur une partie au moins de la face latérale (6) opposée à la languette de traction (15) et de l'autre côté jusque sur une partie du rebord élargi (8) formant ladite languette, de sorte que les bandes de renfort, qui s'étendent parallèlement ou sensiblement parallèlement entre elles sur la majeure partie de leur longueur, se dirigent l'une vers l'autre sur le reste de leur longueur - après pliage de la première feuille (1) - par des portions terminales appartenant à la languette (15) et longeant la ligne de pliage (24) située au pied de celle-ci.1.- Airtight packaging container with easy opening for pasty products, in particular for food products such as processed cheese or semi-salt, composed of two thin sheets, namely a first sheet cut according to an appropriate contour and shaped into a shell by folding maceration to reveal the bottom and the lateral sides of the packaging, and a second sheet cut to the dimensions of said bottom and laid flat on the surface of the product to be conditioned previously placed in said shell, while the parts of the first sheet forming said lateral faces are extended by flanges which are folded down and heat-sealed on the edges of the second sheet, the inner sides of the first sheet respectively and the outer sides of the second sheet being coated for this purpose with a heat-sealable lacquer, and a portion of the first sheet, comprising the bottom and at least one lateral face, constitutes a wide opening band which must t tear the 10 g of the fold lines bordering said side face and the bottom by pulling on a tongue formed by the rim of this last side face, wider than the other edges, the corners of this enlarged rim being folded down along lines of oblique folding so that the pull tab takes a generally triangular shape and that this is the outer face, not coated with heat-sealable lacquer, of the part of the first sheet forming said tab which comes into contact with the outer face of the second sheet , characterized in that along the fold lines which laterally delimit the opening strip (19) of the packaging are provided, adhering to the first sheet (1) in which this strip is taken, reinforcing strips ( 20, 21) guiding the progress of the tear during the opening of the packaging, these reinforcement strips (20, 21), considered on the first sheet (1) before folding thereof, being rectilig nes and each of them s extending from one side over at least part of the lateral face (6) opposite the pull tab (15) and on the other side to a part of the enlarged flange (8) forming said tab, so that the reinforcing strips, which extend parallel or substantially parallel to each other over most of their length, go towards each other over the rest of their length - after folding the first sheet (1) - by end portions belonging to the tongue (15) and along the fold line (24) located at foot of it. 2.- Emballage selon la revendication 1, dans lequel la largeur du rebord élargi est telle qu'entre les deux coins rabattus de la languette de traction restent découvertes des portions thermosoudables de la première feuille et de la deuxième feuille en regard, caractérisé par le fait que le rebord élargi (8) est complémentairement élargi en une partie centrale (31) de sa bordure, sur une longueur (e) inférieure à la largeur (b) de la bande d'ouverture (19), de manière que la surface entière de la languette de traction (15) soit couverte par les coins rabattus, à la seule exception des portions thermodurcissables précitées, celles-ci étant délimitées par une petite fenêtre (30) définie par les encoches terminales (32, 33) apparaissant aux angles dudit rebord (8) du fait de la présence de ladite partie centrale élargie (31).2. Packaging according to claim 1, in which the width of the widened rim is such that between the two folded corners of the pull tab remain heat-sealable portions of the first sheet and of the second facing sheet, characterized by the fact that the enlarged rim (8) is additionally enlarged in a central part (31) of its border, over a length (e) less than the width (b) of the opening strip (19), so that the surface whole of the pull tab (15) is covered by the folded corners, with the sole exception of the thermosetting portions mentioned above, these being delimited by a small window (30) defined by the terminal notches (32, 33) appearing at the corners of said rim (8) due to the presence of said enlarged central part (31). 3.- Emballage selon la revendication 1 ou 2, caractérisé par le fait que les bandes de renfort (20, 21) sont thermosoudées sur la première feuille (1).3.- Package according to claim 1 or 2, characterized in that the reinforcing strips (20, 21) are heat sealed on the first sheet (1). 4.- Emballage selon l'une quelconque des revendications 1 à 3, caractérisé par le fait que des amorces de rupture (22, 23) sont prévues dans le rebord élargi (8) formant la languette de traction, sensiblement à l'extrémité des lignes de pliage quelongent les bandes de renfort (20, 21).4.- Packaging according to any one of claims 1 to 3, characterized in that the rupture primers (22, 23) are provided in the enlarged flange (8) forming the pull tab, substantially at the end of the fold lines along the reinforcement strips (20, 21). 5.- Emballage selon la revendication 4, caractérisé par le fait que les amorces de rupture (22, 23) sont constituées par de courtes entailles poinçonnées dans la bordure dudit rebord élargi (8) avec la même orientation que les lignes de pliage correspondant sur ce rebord aux bandes de renfort.5.- Packaging according to claim 4, characterized in that the breaking points (22, 23) consist of short notches punched in the edge of said enlarged flange (8) with the same orientation as the corresponding fold lines on this ledge to the bands reinforcement. 6.- Emballage selon la revendication 4 ou 5, caractérisé par le fait que les bandes de renfort (20, 21) sont disposées sur la première feuille (1) de manière à laisser de petites marges (d) entre leurs lisières extérieures et les lignes de pliage correspondantes.6.- Packaging according to claim 4 or 5, characterized in that the reinforcing strips (20, 21) are arranged on the first sheet (1) so as to leave small margins (d) between their outer edges and the Corresponding fold lines. 7.- Emballage selon l'une quelconque des revendications 1 à 6, caractérisé par le fait qu'il est de forme prismatique avec une base (correspondant au fond précité) rectangulaire.7. Packaging according to any one of claims 1 to 6, characterized in that it is of prismatic shape with a rectangular base (corresponding to the above-mentioned bottom). 8.- Emballage selon l'une quelconque des revendications 1 à 6, caractérisé par le fait qu'il est de forme prismatique avec une base (correspondant au fond précité) triangulaire.8.- Package according to any one of claims 1 to 6, characterized in that it is of prismatic shape with a base (corresponding to the above-mentioned bottom) triangular. 9.- Emballage selon l'une quelconque des revendications 1 à 6, caractérisé par le fait qu'il est de forme prismatique avec une base (correspondant au fond précité) en forme de secteur circulaire.9. Packaging according to any one of claims 1 to 6, characterized in that it is of prismatic shape with a base (corresponding to the above-mentioned bottom) in the shape of a circular sector.
EP19820400170 1981-02-03 1982-02-01 Easily openable package e.g. for foodstuff in paste form Expired EP0057644B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8102016A FR2499025A1 (en) 1981-02-03 1981-02-03 PACKAGING OF EASY-OPENING PACKAGING, IN PARTICULAR FOR PASTA FOOD PRODUCTS
FR8102016 1981-02-03

Publications (3)

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EP0057644A2 true EP0057644A2 (en) 1982-08-11
EP0057644A3 EP0057644A3 (en) 1982-08-25
EP0057644B1 EP0057644B1 (en) 1984-10-03

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EP (1) EP0057644B1 (en)
DE (1) DE3260854D1 (en)
FR (1) FR2499025A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0257547A (en) * 1988-04-26 1990-02-27 Bel Fromageries Device enabling unsealing by tearing of pack package of pasty product
EP1074485A1 (en) * 1999-07-28 2001-02-07 OFFICINE MECCANICHE NATALINO CORAZZA S.p.A. Pack for a food product of paste consistency, with an improved tear-open feature
FR2808782A1 (en) * 2000-05-12 2001-11-16 Bel Fromageries Wrapper for portion of cheese spread comprises piece of foil with base and side walls which have central sections which can be torn off as continuous strip, allowing access to cheese
WO2001049586A3 (en) * 2000-01-07 2002-11-14 Bel Fromageries Assembly comprising a package and a processed cheese portion
WO2006075229A1 (en) * 2005-01-14 2006-07-20 Kimaco S.A. Device for opening a package
WO2006075234A1 (en) * 2005-01-14 2006-07-20 Kimaco S.A. Plastic packaging and production and packaging method

Families Citing this family (2)

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Publication number Priority date Publication date Assignee Title
CH696167A5 (en) 2002-12-04 2007-01-31 Fromageries Bel S A tight packaging container for pasty product.
FR3106341B1 (en) 2020-01-22 2022-01-28 Bel Packaging for food product formed of a sheet sealed on itself

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US3263807A (en) * 1963-03-14 1966-08-02 Gen Foods Corp Package
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CH557269A (en) * 1972-11-22 1974-12-31 Kustner Freres Cie Sa Foil packaging with easy open panel - one side of package has attached reinforcing panel opening foil when pulled
FR2362765A1 (en) * 1976-08-25 1978-03-24 Nestle Sa Pasty prods. wrapping system - includes string inserted in wrapping foil so that it can be torn open

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DE916967C (en) * 1941-04-10 1954-08-23 Duetsche Edelstahlwerke Ag Device for electro-inductive heating of metallic workpieces
US3263807A (en) * 1963-03-14 1966-08-02 Gen Foods Corp Package
BE683047A (en) * 1965-07-23 1966-12-01
FR2142115A5 (en) * 1971-06-14 1973-01-26 Samos France
CH557269A (en) * 1972-11-22 1974-12-31 Kustner Freres Cie Sa Foil packaging with easy open panel - one side of package has attached reinforcing panel opening foil when pulled
FR2362765A1 (en) * 1976-08-25 1978-03-24 Nestle Sa Pasty prods. wrapping system - includes string inserted in wrapping foil so that it can be torn open

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0257547A (en) * 1988-04-26 1990-02-27 Bel Fromageries Device enabling unsealing by tearing of pack package of pasty product
EP1074485A1 (en) * 1999-07-28 2001-02-07 OFFICINE MECCANICHE NATALINO CORAZZA S.p.A. Pack for a food product of paste consistency, with an improved tear-open feature
WO2001049586A3 (en) * 2000-01-07 2002-11-14 Bel Fromageries Assembly comprising a package and a processed cheese portion
AU777494B2 (en) * 2000-01-07 2004-10-21 Fromageries Bel Assembly comprising a package and a processed cheese portion
US7318941B2 (en) 2000-01-07 2008-01-15 Fromageries Bel Assembly comprising a package and a processed cheese portion
FR2808782A1 (en) * 2000-05-12 2001-11-16 Bel Fromageries Wrapper for portion of cheese spread comprises piece of foil with base and side walls which have central sections which can be torn off as continuous strip, allowing access to cheese
WO2006075229A1 (en) * 2005-01-14 2006-07-20 Kimaco S.A. Device for opening a package
WO2006075234A1 (en) * 2005-01-14 2006-07-20 Kimaco S.A. Plastic packaging and production and packaging method
FR2880836A1 (en) * 2005-01-14 2006-07-21 Kimco S A Sa PLASTIC PACKAGING AND METHOD FOR MANUFACTURING AND PACKAGING
FR2880869A1 (en) * 2005-01-14 2006-07-21 Kimco S A Sa DEVICE FOR OPENING A PACKAGING

Also Published As

Publication number Publication date
DE3260854D1 (en) 1984-11-08
FR2499025B1 (en) 1984-08-03
FR2499025A1 (en) 1982-08-06
EP0057644A3 (en) 1982-08-25
EP0057644B1 (en) 1984-10-03

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