EP0006993B1 - Method of connecting parts of a container formed from a plastics foil; a container or parts of a container - Google Patents

Method of connecting parts of a container formed from a plastics foil; a container or parts of a container Download PDF

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Publication number
EP0006993B1
EP0006993B1 EP79101675A EP79101675A EP0006993B1 EP 0006993 B1 EP0006993 B1 EP 0006993B1 EP 79101675 A EP79101675 A EP 79101675A EP 79101675 A EP79101675 A EP 79101675A EP 0006993 B1 EP0006993 B1 EP 0006993B1
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EP
European Patent Office
Prior art keywords
container
connecting parts
parts
portions
container portions
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EP79101675A
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German (de)
French (fr)
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EP0006993A2 (en
EP0006993A3 (en
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Roland Veitinger
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    • 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
    • B65D75/04—Articles or materials wholly enclosed in single sheets or wrapper blanks
    • B65D75/20—Articles or materials wholly enclosed in single sheets or wrapper blanks in sheets or blanks doubled around contents and having their opposed free margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding
    • B65D75/22—Articles or materials wholly enclosed in single sheets or wrapper blanks in sheets or blanks doubled around contents and having their opposed free margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding the sheet or blank being recessed to accommodate contents

Definitions

  • the invention relates to a method for connecting container parts formed from plastic film by means of connecting parts which are integrally formed in the edge region, which can be plugged together and which act like a push button, and to containers which serve to carry out the method or are connected according to the method.
  • US-A-3 356 277, 3 421 682, 3 661 317 and 3655110 have disclosed transport containers for eggs, the container parts of which are deep-drawn from a relatively thin plastic film and are also connected to one another by means of push-button-type connections. Ribs are provided on the connecting parts to increase the holding force. With such containers, however, it is difficult to generate a sufficient holding force for the push-button connections, because the thin material does not allow sufficient holding forces if the design is such that the push-button-like connections can also be easily inserted into one another. For this reason, these containers can only be used for relatively light objects such as eggs.
  • the underside of the wearer's hand in particular is unprotected and is easily injured on the sharp, protruding edges on the underside of the handle recess.
  • the invention has for its object to provide a method for connecting container parts, which makes it possible to provide this connection despite small forces when plugging into each other with great holding force, but to keep the connection detachable at any time and with little effort and to reduce the risk of injury.
  • the connecting parts are permanently deformed after being inserted into one another by axial pressure in the sense of widening the inner connecting part.
  • the two cooperating connecting parts do not therefore need to exert any significant holding forces after they have been inserted into one another and can therefore be designed either without any force or with only a weaker push-button effect.
  • a deformation occurs which in any case widens the inner, but usually also the outer connecting part and thus achieves a holding force or increases it considerably.
  • the bottoms or head parts of the preferably cup-like connecting parts are pressed more or less flat and the deformation is permanent, i. H. the floors remain in their deformed state as long as the connection exists. After loosening the connection, which is possible because of the elastic properties of the plastic, the deformation can be reset automatically or by hand, so that the connection can be restored when the container is closed again.
  • Container parts are preferably used to carry out the method, the inner connecting parts of which, in order to be deformable in the region of their insertion ends, have expansion sections such as beads, waves or differences in wall thickness. As a result, the inner connecting parts can expand well outwards when deformed.
  • expansion sections are preferably inwardly directed beads which run in the axial plane of the inner connecting parts.
  • the mutually associated walls of the connecting parts are preferably designed to be rotationally symmetrical prior to the compression and advantageously, before the compression, starting from the edge of the container part, initially cylindrical and then formed with a tapered, arched, conical or frustoconical bottom forms. This shape ensures a strong and uniform expansion of the inner connecting parts and also enables the outer connecting parts to expand accordingly in order to produce an almost form-fitting connection.
  • the bottoms of the connecting parts which are connected by the method are preferably pressed in on the part of the plastic film from which they protrude. They are usually slightly curved inwards and are approximately parallel to each other, so that they keep themselves in the spread position.
  • the one container part can have a flap which is formed by the formation of the handle cutout and is hinged to the lower edge of the handle cutout and extends over the lower edge of the Handle cutout of the other container part is bent to protect the hand.
  • the handle cutout can therefore also be made smaller, which saves material in the edge area.
  • the container 1 consists of two essentially identical container parts 2, 3 which are articulated to one another and which, when folded, result in a box-like, essentially cuboid container (cf. FIGS. 1 and 2).
  • the two one-piece container parts 2, 3 were manufactured from a flat, thin and relatively rigid plastic film using the deep-drawing process.
  • the two container parts 2, 3 each represent a shell per se, the side walls of which run perpendicular to one another and to the base of the shell, these side walls — not shown in the drawing — can have stiffening ribs or a profiling serving to stiffen them.
  • One side wall 4 of one container part 2 is articulated to a side wall 5 of the other container part 3.
  • the remaining side walls of the two container parts each have edges 6 to 11 which are bent outward at right angles and which, when the two container parts 2, 3 are folded against one another, lie flat against one another.
  • the container part edges 7, 10 opposite the articulated connection of the two container parts 2, 3 are each made wider than that of the articulated connection of adjacent edges 6, 8 or 9, 11 and each have a plurality of, in the embodiment shown, four pairs of connecting parts 12 , 13, which were formed during the manufacture of the container parts or thereafter from them in the deep drawing process.
  • the walls of these connecting parts are essentially rotationally symmetrical in the embodiment shown, starting from the container part edge 7 or 10 they are initially cylindrical and then frustoconical.
  • the connecting parts 12 of the one container part 3 are dimensioned such that they can be pressed into the connecting parts 13 of the other container part 2.
  • the edges 7, 10 opposite the articulated connection of the container parts 2, 3 each also have a handle cutout 14, 15. Lugs 16, 17 protrude into the handle cutout 15 of the edge 1J, which can be gripped by a tab 20 projecting from below into the handle cutout 14 of the edge 7 when the two container parts 2, 3 are folded against one another.
  • the inner connecting parts 12 (see FIGS. 3 and 4) have in their frustoconical head region inwardly directed beads 18 which form a continuation of beads 19 also provided in their cylindrical shell and also directed inwards.
  • the two container parts are to be folded against one another, taking care that the inner connecting parts 12, which are provided in the illustrated embodiment only on one container part, but also can be provided on both container parts, are aligned with the outer connecting parts of the other container part.
  • the mutually associated connecting parts can then be pushed into one another without great effort and - with slight additional axial pressure on the frustoconical head regions 21 in the exemplary embodiment - locked against one another, the inner connecting parts in each case being deformed in the region of the transition between the circular cylindrical jacket and the head region in the sense of widening. This expansion is facilitated by the aforementioned beads 18 and 19.
  • the Elongation deformations formed by the beads can also be formed in a different way, for example by a wave-like shape of the jacket or by generating differences in wall thickness in the jacket.
  • the truncated cone shape of the head part 21 is also particularly advantageous because, as can be seen from FIG. 4, an internally stable position forms when pressed in, but this causes an expansion in the edge region of the cylindrical part near the head. This will u. a. achieved in that the transitions between the conical part and the upper flat part prevent a complete snapping of the head part.
  • the continuation of the beads in the region of the head part and in particular in the region of the frustoconical part also contributes to an expansion of the jacket part in which the upper base area close to the head part is larger than the base surface with which the connecting part is integrally formed on the edge .
  • the inner connecting parts 12 positively (with a stamp) and the outer connecting parts 13 negatively (into a negative shape).
  • the wall thickness of the inner connecting part 12 in the cover area becomes thicker than in the outer connecting part 13, so that the inner connecting part 12 has a particularly strong expansion force in the upper edge area.
  • the thin design of the outer connecting parts 13 has the consequence that they can be deformed by pressing in without lateral beads.
  • the expansion of the inner connecting part 12 is mainly essential, while the lid area of the outer connecting part 13 must also be pressed in so that the pressing in of the inner connecting part 12 is possible at all.

Description

Die Erfindung betrifft ein Verfahren zum Verbinden von aus Kunststoffolie geformten Behälterteilen mittels im Randbereich angeformter, ineinandersteckbarer, druckknopfartig zusammenwirkender Verbindungsteile, sowie Behälter, die zur Ausführung des Verfahrens dienen bzw. nach dem Verfahren verbunden sind.The invention relates to a method for connecting container parts formed from plastic film by means of connecting parts which are integrally formed in the edge region, which can be plugged together and which act like a push button, and to containers which serve to carry out the method or are connected according to the method.

Aus der US-A-3 786 982 ist ein aus zwei Hälften bestehender Behälter bekanntgeworden, der aus thermoplastischem Kunststoff geformt ist und dessen beide Hä!ften durch ein Filmscharnier miteinander verbunden sind. In den äußeren Randbereichen ist eine druckknopfartige Verbindung angeformt, die aus einem in eine Ausnehmung eingreifenden Zapfen besteht, die so bemessen sind, daß sie nach dem Zusammenstecken durch Reibung aneinanderhalten. Eine derartige Verbindung erbringt nur bei aus relativ dickwandigem Material bestehenden Behältern eine ausreichende Haltekraft.From US-A-3 786 982 a container consisting of two halves has become known, which is molded from thermoplastic material and the two ha ! joints are connected by a film hinge. In the outer edge areas, a push-button-like connection is formed, which consists of a pin engaging in a recess, which are dimensioned such that they stick together by friction after being plugged together. Such a connection provides sufficient holding force only in the case of containers made of relatively thick-walled material.

Aus den US-A-3 356 277, 3 421 682, 3 661 317 und 3655110 sind Transportbehälter für Eier bekanntgeworden, deren aus relativ dünner Kunststoffolie tiefgezogene Behälterteile ebenfalls durch druckknopfartige Verbindungen miteinander verbunden werden. Dabei sind an den Verbindungsteilen Verrippungen vorgesehen, die die Haltekraft erhöhen sollen. Bei derartigen Behältern ist es allerdings schwierig, eine ausreichende Haltekraft der Druckknopf-Verbindungen zu erzeugen, weil das dünne Material keine ausreichenden Haltekräfte erlaubt, wenn die Bemessung so ist, daß sich die druckknopfartigen Verbindungen auch ohne weiteres ineinander einstecken lassen. Aus diesem Grunde sind diese Behälter auch nur für relativ leichte Gegenstände, wie Eier, zu verwenden.US-A-3 356 277, 3 421 682, 3 661 317 and 3655110 have disclosed transport containers for eggs, the container parts of which are deep-drawn from a relatively thin plastic film and are also connected to one another by means of push-button-type connections. Ribs are provided on the connecting parts to increase the holding force. With such containers, however, it is difficult to generate a sufficient holding force for the push-button connections, because the thin material does not allow sufficient holding forces if the design is such that the push-button-like connections can also be easily inserted into one another. For this reason, these containers can only be used for relatively light objects such as eggs.

Wenn jedoch derartige Behälter als Klarsichtverpackungen für andere Lebensmittel, z. B. Safttüten-Gebinde oder andere schwere Gegenstände verwendet werden sollen, so ist es nicht gewährleistet, daß die Verbindungsteile die beiden Behälterhälften so fest miteinander verbinden, daß ein unbeabsichtigtes Öffnen des Behälters, beispielsweise beim Abstellen, ausgeschlossen werden kann. Aus diesem Grunde ist es bereits vorgeschlagen worden, die beiden Behälterteile zusätzlich miteinander zu verschweißen oder zu verkleben, wodurch jedoch das Öffnen des Behälters erschwert wird. Außerdem können durch die unregelmäßigen Ränder nach dem Öffnen Verletzungen entstehen.However, if such containers as transparent packaging for other foods, e.g. B. juice packs or other heavy objects are used, it is not guaranteed that the connecting parts connect the two container halves so tightly that an unintentional opening of the container, for example when parking, can be excluded. For this reason, it has already been proposed to additionally weld or glue the two container parts together, but this makes opening the container more difficult. In addition, the irregular edges can cause injuries after opening.

Aus der US-A-3 800 998 ist ein Behälter der vorher beschriebenen Art bekanntgeworden, der in seinem Randbereich Griffausnehmungen besitzt, an denen er getragen werden kann. Im Bereich der einen Behälterhälfte ist dabei eine Lasche angeformt, die in einen Schlitz an der anderen Behälterhälfte eingreift, um die beiden Behälterhälften miteinander zu verbinden. Diese Lasche kann auch selbst eine Griffausnehmung enthalten, damit der Benutzter die beiden Hälften beim Tragen zusammenhält.From US-A-3 800 998 a container of the type described above has become known, which has grip recesses in its edge area, on which it can be carried. In the area of one container half, a tab is formed, which engages in a slot on the other container half in order to connect the two container halves to one another. This tab can also contain a handle recess itself, so that the user holds the two halves together when carrying them.

Bei dieser Ausführung ist jedoch insbesondere die Unterseite der Hand des Trägers ungeschützt und wird leicht an den scharfen hochragenden Kanten an der Unterseite der Griffausnehmung verletzt.In this embodiment, however, the underside of the wearer's hand in particular is unprotected and is easily injured on the sharp, protruding edges on the underside of the handle recess.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Verbindung von Behälterteilen zu schaffen, das es ermöglicht, diese Verbindung trotz geringer Kräfte beim Ineinanderstecken mit großer Haltekraft zu versehen, jedoch die Verbindung jederzeit und ohne großen Aufwand wieder lösbar zu erhalten und Verletzungsgefahren zu verringern.The invention has for its object to provide a method for connecting container parts, which makes it possible to provide this connection despite small forces when plugging into each other with great holding force, but to keep the connection detachable at any time and with little effort and to reduce the risk of injury.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Verbindungsteile nach dem Ineinanderstecken durch axialen Druck im Sinne der Aufweitung des inneren Verbindungsteils bleibend verformt werden. Die beiden zusammenwirkenden Verbindungsteile brauchen also nach ihrem Ineinanderstecken noch keine wesentlichen Haltekräfte aufzubringen und können daher entweder ganz kräftefrei oder mit nur schwächerer Druckknopfwirkung ausgebildet sein. Durch die Aufbringung des axialen Druckes auf die Böden der beiden ineinandergesteckten Verbindungsteile tritt eine Verformung ein, die auf jeden Fall das innere, meist aber auch das äußere Verbindungsteil aufweitet und somit eine Haltekraft erzielt oder diese wesentlich erhöht. Die Böden oder Kopfteile der vorzugsweise napfartigen Verbindungsteile werden dabei mehr oder weniger flach gedrückt und die Verformung ist bleibend, d. h. die Böden bleiben in ihrem verformten Zustand, solange die Verbindung besteht. Nach einem Lösen der Verbindung, was wegen der elastischen Eigenschaften des Kunststoffes möglich ist, kann die Verformung selbsttätig oder von Hand zurückgestellt werden, so daß die Verbindung bei einem erneuten Verschließen des Behälters wieder hergestellt werden kann.This object is achieved in that the connecting parts are permanently deformed after being inserted into one another by axial pressure in the sense of widening the inner connecting part. The two cooperating connecting parts do not therefore need to exert any significant holding forces after they have been inserted into one another and can therefore be designed either without any force or with only a weaker push-button effect. By applying the axial pressure to the bottoms of the two nested connecting parts, a deformation occurs which in any case widens the inner, but usually also the outer connecting part and thus achieves a holding force or increases it considerably. The bottoms or head parts of the preferably cup-like connecting parts are pressed more or less flat and the deformation is permanent, i. H. the floors remain in their deformed state as long as the connection exists. After loosening the connection, which is possible because of the elastic properties of the plastic, the deformation can be reset automatically or by hand, so that the connection can be restored when the container is closed again.

Zur Ausführung des Verfahrens dienen vorzugsweise Behälterteile, deren innere Verbindungsteile zu ihrer Verformbarkeit im Bereich ihrer Einsteckenden Dehnungsabschnitte wie Sicken, Wellen oder Wandstärkeunterschiede aufweisen. Dadurch können sich die inneren Verbinduntsteile bei iher Verformung gut nach außen aufweiten.Container parts are preferably used to carry out the method, the inner connecting parts of which, in order to be deformable in the region of their insertion ends, have expansion sections such as beads, waves or differences in wall thickness. As a result, the inner connecting parts can expand well outwards when deformed.

Diese Dehnungsabschnitte sind vorzugsweise nach innen gerichtete, in der Achsebene der inneren Verbindungsteile verlaufende Sicken.These expansion sections are preferably inwardly directed beads which run in the axial plane of the inner connecting parts.

Die einander zugeordneten Wandungen der Verbindungsteile sind vor dem Zusammendrükken vorzugsweise rotationssymmetrisch ausgebildet und vorteilhaft vor dem Zusammendrükken vom Behälterteil-Rand ausgehend zunächst zylindrisch und daran anschließend mit einem sich verjüngenden, gewölbten, kegelförmig oder kegelstumpfförmig ausgebildeten Boden ausgebildet. Diese Form stellt eine kräftige und gleichmäßige Ausdehnung der inneren Verbindungsteile sicher und ermöglicht es auch den äußeren Verbindungsteilen, sich entsprechend aufzuweiten, um eine nahezu formschlüssige Verbindung herzustellen.The mutually associated walls of the connecting parts are preferably designed to be rotationally symmetrical prior to the compression and advantageously, before the compression, starting from the edge of the container part, initially cylindrical and then formed with a tapered, arched, conical or frustoconical bottom forms. This shape ensures a strong and uniform expansion of the inner connecting parts and also enables the outer connecting parts to expand accordingly in order to produce an almost form-fitting connection.

Die Böden der Verbindungsteile, die nach dem Verfahren verbunden sind, sind vorzugsweise auf den Teil der Kunststoffolie, aus dem sie hervorragen, zu eingedrückt. Sie sind dabei meist leicht nach innen gewölbt und liegen etwa zueinander parallel, so daß sie sich selbst in der gespreizten Stellung halten.The bottoms of the connecting parts which are connected by the method are preferably pressed in on the part of the plastic film from which they protrude. They are usually slightly curved inwards and are approximately parallel to each other, so that they keep themselves in the spread position.

Vorzugsweise kann bei einem Behälter mit zwei Behälterteilen, die gelenkartig miteinander verbunden sind und in ihren den gelenkartigen Verbindungen gegenüberliegenden Randbereichen Griffausschnitte aufweisen, der eine Behälterteil eine durch die Bildung des Griffausschnittes entstandene, am unteren Rand des Griffausschnittes angelenkte Lasche aufweisen, die über die Unterkante des Griffausschnittes des anderen Behälterteils zum Schutz der Hand umgebogen ist. Dadurch wird bei miteinander verbundem Behälter verhindert, daß die meist scharfen Kanten der Kunststoffolie im Bereich des Griffausschnittes die besonders empfindliche Hand-Oberseite verletzen. Der Griffausschnitt kann daher auch kleiner ausgebildet sein, wodurch Material im Randbereich gespart wird.Preferably, in the case of a container with two container parts which are connected to one another in an articulated manner and have handle cutouts in their edge regions opposite the articulated connections, the one container part can have a flap which is formed by the formation of the handle cutout and is hinged to the lower edge of the handle cutout and extends over the lower edge of the Handle cutout of the other container part is bent to protect the hand. When the container is connected to one another, this prevents the mostly sharp edges of the plastic film in the region of the handle cutout from damaging the particularly sensitive upper side of the hand. The handle cutout can therefore also be made smaller, which saves material in the edge area.

Für die Behälterteile nach den Ansprüchen 2 bis 6 wird Schutz nur beansprucht, soweit sie zur Durchführung des Verfahrens nach Anspruch 1 dienen sollen bzw. nach diesem verbunden sind.Protection is only claimed for the container parts according to claims 2 to 6 insofar as they are to serve to carry out the method according to claim 1 or are connected according to this.

Ein Ausführungsbeispiel eines nach dem Verfahren zu verbindenden bzw. verbundenen Behälters ist in der Zeichnung dargestellt und dient im folgenden zur Erläuterung der Erfindung. In der Zeichnung zeigen jeweils schematisch:

  • Fig. 1 eine Seitenansicht eines nach dem Verfahren verbundenen Behälters,
  • Fig. 2 den in Fig. 1 dargestellten Behälter vor der Verbindung,
  • Fig. 3 ein inneres und ein diesem zugeordnetes äußeres Verbindungsteil vor ihrerVerbindung,
  • Fig. 4 die in Fig. 3 dargestellten Verbindungsteile nach ihrerVerbindung und
  • Fig. 5 einen Ausschnitt aus dem oberen, einen Griffausschnitt aufweisenden Behälter-Rand.
An embodiment of a container to be connected or connected according to the method is shown in the drawing and is used below to explain the invention. The drawings each show schematically:
  • 1 is a side view of a container connected by the method,
  • 2 shows the container shown in FIG. 1 before the connection,
  • 3 shows an inner and an outer connecting part assigned to it before their connection,
  • Fig. 4 shows the connecting parts shown in Fig. 3 after their connection and
  • Fig. 5 shows a section of the upper, a handle cutout container edge.

Der erfindungsgemäße Behälter 1 besteht in der dargestellten Ausführungsform aus zwei im wesentlichen gleich ausgebildeten, gelenkartig miteinander verbundenen Behälterteilen 2, 3, die im zusammengeklappten Zustand einen kofferartig ausgebildeten, im wesentlichen quaderförmigen Behälter ergeben (vgl. Fig. 1 und 2). Hergestellt wurden die beiden einstückig ausgebildeten Behälterteile 2, 3 aus einer planen, dünnen und relativ starren Kunststoff-KlarsichtFolie im Tiefziehverfahren. Die beiden Behälterteile 2, 3 stellen für sich betrachtet jeweils eine Schale dar, deren Seitenwände senkrecht zueinander und zum Schalenboden verlaufen, wobei diese Seitenwände - in der Zeichnung nicht dargestellte - Versteifungsrippen oder eine ihrer Versteifung dienenden Profilierung aufweisen können. Die eine Seitenwand 4 des einen Behälterteiles 2 ist gelenkig mit einer Seitenwand 5 des anderen Behälterteils 3 verbunden. Die übrigen Seitenwände der beiden Behälterteile weisen jeweils rechtwinklig nach außen gebogene Ränder 6 bis 11 auf, die, wenn die beiden Behälterteile 2, 3 gegeneinandergeklappt sind, plan aneinander anliegen. Die der gelenkigen Verbindung der beiden Behälterteile 2, 3 gegenüberliegenden Behälterteil-Ränder 7, 10 sind jeweils breiter ausgeführt als die der gelenkigen Verbindung benachbarter Ränder 6, 8 bzw. 9, 11 und weisen jeweils mehrere, in der dargestellten Ausführungsform vier Paare von Verbindungsteilen 12, 13 auf, die bei der Herstellung der Behälterteile oder danach aus ihnen im Tiefziehverfahren ausgeformt wurden. Die Wandungen dieser Verbindungsteile sind bei der dargestellten Ausführungsform im wesentlicher, rotationssymmetrisch ausgebildet, wobei sie, ausgehend vom Behälterteil-Rand 7 bzw. 10 zunächst zylindrisch und daran anschließend kegelstumpfförmig ausgebildet sind. Die Verbindungsteile 12 des einen Behälterteiles 3 sind dabei so bemessen, daß sie in die Verbindungsteile 13 des anderen Behälterteiles 2 eindrückbar sind. Neben vorerwähnten Verbindungsteilen 12, 13 weisen die der gelenkigen Verbindung der Behälterteile 2, 3 gegenüberliegenden Ränder 7, 10 jeweils noch einen Griffausschnitt 14, 15 auf. In den Griffausschnitt 15 des Randes lJ ragen seitliche Lappen 16, 17, die von einer von unten in den Griffausschnitt 14 des Randes 7 ragenden Lasche 20 untergreifbar sind, wenn die beiden Behälterteile 2, 3 gegeneinandergeklappt sind.In the embodiment shown, the container 1 according to the invention consists of two essentially identical container parts 2, 3 which are articulated to one another and which, when folded, result in a box-like, essentially cuboid container (cf. FIGS. 1 and 2). The two one-piece container parts 2, 3 were manufactured from a flat, thin and relatively rigid plastic film using the deep-drawing process. The two container parts 2, 3 each represent a shell per se, the side walls of which run perpendicular to one another and to the base of the shell, these side walls — not shown in the drawing — can have stiffening ribs or a profiling serving to stiffen them. One side wall 4 of one container part 2 is articulated to a side wall 5 of the other container part 3. The remaining side walls of the two container parts each have edges 6 to 11 which are bent outward at right angles and which, when the two container parts 2, 3 are folded against one another, lie flat against one another. The container part edges 7, 10 opposite the articulated connection of the two container parts 2, 3 are each made wider than that of the articulated connection of adjacent edges 6, 8 or 9, 11 and each have a plurality of, in the embodiment shown, four pairs of connecting parts 12 , 13, which were formed during the manufacture of the container parts or thereafter from them in the deep drawing process. The walls of these connecting parts are essentially rotationally symmetrical in the embodiment shown, starting from the container part edge 7 or 10 they are initially cylindrical and then frustoconical. The connecting parts 12 of the one container part 3 are dimensioned such that they can be pressed into the connecting parts 13 of the other container part 2. In addition to the aforementioned connecting parts 12, 13, the edges 7, 10 opposite the articulated connection of the container parts 2, 3 each also have a handle cutout 14, 15. Lugs 16, 17 protrude into the handle cutout 15 of the edge 1J, which can be gripped by a tab 20 projecting from below into the handle cutout 14 of the edge 7 when the two container parts 2, 3 are folded against one another.

Die inneren Verbindungsteile 12 weisen (vgl. Fig.3 und 4) in ihrem kegelstumpfförmig ausgebildeten Kopfbereich nach innen gerichtete Sicken 18 auf, die eine Fortsetzung von in ihrem zylindrischen Mantel vorgesehenen, ebenfalls nach innen gerichteten Sicken 19 bilden.The inner connecting parts 12 (see FIGS. 3 and 4) have in their frustoconical head region inwardly directed beads 18 which form a continuation of beads 19 also provided in their cylindrical shell and also directed inwards.

Nachdem der eine und/oder der andere der beiden Behälterteile mit zu transportierendem Gut gefüllt ist, sind die beiden Behälterteile gegeneinanderzuklappen, wobei darauf zu achten ist, daß die inneren Verbindungsteile 12, die bei der dargestellten Ausführungsform nur an einem Behälterteil vorgesehen sind, aber auch an beiden Behälterteilen vorgesehen sein können, auf die äußeren Verbindungsteile des anderen Behälterteils ausgerichtet sind. Danach lassen sich die einander zugeordneten Verbindungsteile ohne größeren Kraftaufwand ineinanderschieben und - durch leichten zusätzlichen axialen Druck auf die beim Ausführungsbeispiel kegelstumpfartigen Kopfbereiche 21 - gegeneinander verriegelri, wobei jeweils die inneren Verbindungsteile im Bereich des Überganges zwischen kreiszylindrischem Mantel und Kopfbereich im Sinne einer Aufweitung verformt werden. Diese Aufweitung wird durch die vorerwähnten Sicken 18 und 19 erleichtert. Die durch die Sicken gebildeten Dehnungsverformungen können auch in anderer Weise ausgebildet sein, beispielsweise durch eine wellenartige Gestalt des Mantels oder durch die Erzeugung von Wandstärkeunterschieden im Mantel.After one and / or the other of the two container parts is filled with goods to be transported, the two container parts are to be folded against one another, taking care that the inner connecting parts 12, which are provided in the illustrated embodiment only on one container part, but also can be provided on both container parts, are aligned with the outer connecting parts of the other container part. The mutually associated connecting parts can then be pushed into one another without great effort and - with slight additional axial pressure on the frustoconical head regions 21 in the exemplary embodiment - locked against one another, the inner connecting parts in each case being deformed in the region of the transition between the circular cylindrical jacket and the head region in the sense of widening. This expansion is facilitated by the aforementioned beads 18 and 19. The Elongation deformations formed by the beads can also be formed in a different way, for example by a wave-like shape of the jacket or by generating differences in wall thickness in the jacket.

Besonders vorteilhaft ist auch die Kegelstumpfform des Kopfteils 21, weil sich, wie aus Fig. 4 zu ersehen ist, beim Eindrücken eine innere stabile Lage bildet, die jedoch eine Aufweitung im kopfnahen Randbereich des zylindrischen Teils hervorruft. Dies wird u. a. dadurch erreicht, daß die Übergänge zwischen dem kegeligen Teil und dem oberen flachen Teil ein völliges Nachinnenschnappen des Kopfteils verhindern. Auch die Weiterführung der Sicken im Bereich des Kopfteils und insbesondere im Bereich des kegelstumpfförmigen Teils trägt dazu bei, eine Aufweitung des Mantelteils zu erreichen, bei dem die obere, dem Kopfteil nahe Grundfläche größer ist als die Basisfläche, mit der das Verbindungsteil am Rand angeformt ist.The truncated cone shape of the head part 21 is also particularly advantageous because, as can be seen from FIG. 4, an internally stable position forms when pressed in, but this causes an expansion in the edge region of the cylindrical part near the head. This will u. a. achieved in that the transitions between the conical part and the upper flat part prevent a complete snapping of the head part. The continuation of the beads in the region of the head part and in particular in the region of the frustoconical part also contributes to an expansion of the jacket part in which the upper base area close to the head part is larger than the base surface with which the connecting part is integrally formed on the edge .

Als besonders vorteilhaft hat sich erwiesen, die inneren Verbindungsteile 12 positiv (mit einem Stempel) und die äußeren Verbindungsteile 13 negativ (in eine negative Form hinein) zu formen. Dadurch wird die Wandstärke des inneren Verbindungsteiles 12 im Deckelbereich stärker als beim äußeren Verbindungsteil 13, so daß sich beim inneren Verbindungsteil 12 eine besonders kräftige Spreizungskraft im oberen Randbereich ergibt. Die dünne Ausbildung der äußeren Verbindungsteile 13 hat zur Folge, daß diese auch ohne seitliche Sicken durch Eindrükken verformbar sind.It has proven to be particularly advantageous to shape the inner connecting parts 12 positively (with a stamp) and the outer connecting parts 13 negatively (into a negative shape). As a result, the wall thickness of the inner connecting part 12 in the cover area becomes thicker than in the outer connecting part 13, so that the inner connecting part 12 has a particularly strong expansion force in the upper edge area. The thin design of the outer connecting parts 13 has the consequence that they can be deformed by pressing in without lateral beads.

Bei der Verbindung nach der Erfindung ist hauptsächlich die Spreizung des inneren Verbindungsteiles 12 wesentlich, während der Deckelbereich des äußeren Verbindungsteiles 13 auch deswegen mit eingedrückt werden muß, damit das Eindrücken des inneren Verbindungsteiles 12 überhaupt möglich ist.In the connection according to the invention, the expansion of the inner connecting part 12 is mainly essential, while the lid area of the outer connecting part 13 must also be pressed in so that the pressing in of the inner connecting part 12 is possible at all.

Claims (7)

1. Process for connecting container portions (2, 3) made from plastic foil by means of connecting parts (12, 13) formed in the marginal areas and which can be pressed into one another and cooperate in press fastener-like manner, characterized in that after inserting into one another the connecting parts (12, 13) are permanently deformed by axial pressure so as to expand the inner connecting part (12).
2. Container portions for performing the process of claim 1, characterized in that hte inner connecting parts (12) have expansion portions such as reinforcing seams (18, 19) corrugations or wall thickness differences in the vicinity of theier insertion ends to permit deformation thereof.
3. Container portions according to claim 2, characterized in that the expansion portions are constructed as inwardly directed reinforcing seams (18, 19) running in the axial plane of the inner connecting parts (12).
4. Container portions for performing the process of claim 1, characterized in that the facing walls of connecting parts (12, 13) are constructed in axially symmetrical manner prioi to compression.
5. Container portions for performing the process of claim 1, characterized in that prior to compression the facing walls of connecting parts (12, 13) starting from the container portion edge (7, 10) are initially cylindrical and are then constructed with a tapering, domed, conical or truncated cone-shaped base (21).
6. Container portions with connecting parts connected in accordance with the process of claim 1, characterized in that the bases (21) of connecting parts (12, 13) are pressed on to the part of the plastic foil from which they project.
7. Container with two container portions (2, 3) interconnected in hinge-like manner and having in their marginal areas (7, 10) facing the hinge-like connections handle cutouts (14, 15) and which are interconnected by means of press fastener-like connections in accordance with the process of claim 1, characterized in that one container portion has a flap (20) resulting from the formation of the handle cutout (14) and hinged to the lower edge of the handle cutout (14) and which is folded over the lower edge of the handle cutout (15) of the other container portion (3) for protecting the hand.
EP79101675A 1978-06-13 1979-05-31 Method of connecting parts of a container formed from a plastics foil; a container or parts of a container Expired EP0006993B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2825837 1978-06-13
DE2825837A DE2825837C3 (en) 1978-06-13 1978-06-13 Container molded from plastic film

Publications (3)

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EP0006993A2 EP0006993A2 (en) 1980-01-23
EP0006993A3 EP0006993A3 (en) 1980-03-05
EP0006993B1 true EP0006993B1 (en) 1982-01-06

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EP79101675A Expired EP0006993B1 (en) 1978-06-13 1979-05-31 Method of connecting parts of a container formed from a plastics foil; a container or parts of a container

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EP (1) EP0006993B1 (en)
DE (1) DE2825837C3 (en)

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US4625908A (en) * 1983-10-31 1986-12-02 Emery Roy W Container lock construction
US4739883A (en) * 1987-02-20 1988-04-26 Placon Corporation Reclosable display package
US4886204A (en) * 1987-04-06 1989-12-12 Inline Plastics Corporation Food container with ribbed lid locking mechanism
FR2617137A1 (en) * 1987-06-26 1988-12-30 Bouziat Jean Marie Double shell blister which can be reused by consumers
US8042690B2 (en) * 2006-04-07 2011-10-25 Portage Plastics Corporation Wiper blade package
US20090057304A1 (en) * 2006-09-11 2009-03-05 Lamarche Paul Two piece container incorporating nesting characteristics and including interengageable hinge supports for upwardly supporting a lid upon a base
US8800768B2 (en) 2012-05-31 2014-08-12 Milwaukee Electric Tool Corporation Clamshell packaging
US9926118B2 (en) * 2015-12-08 2018-03-27 Inline Plastics Corp. Child-resistant containers

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US2268906A (en) * 1940-01-05 1942-01-06 Scheer George Box
US2336655A (en) * 1942-03-30 1943-12-14 Bloomer Bros Co Carton
AT255961B (en) * 1965-02-19 1967-07-25 Zeljko Hohnjec Two-part box made of thermoplastic plastic
US3326408A (en) * 1965-02-24 1967-06-20 Arthur G Ringlen Plastic box container
DE1920369U (en) * 1965-05-08 1965-07-22 Kalle Ag LOCKABLE CONTAINER.
AT258192B (en) * 1965-06-04 1967-11-10 Ovotherm Ets Packaging made of thermoformed plastic film to hold eggs, fruits or the like.
AT269735B (en) * 1966-03-25 1969-03-25 Hinteregger Kg P Method and device for producing a packaging made of thermoplastic plastic film
GB1204331A (en) * 1966-10-07 1970-09-03 Cristalesco S A A packing tray
DE1764913C3 (en) * 1968-09-03 1975-01-30 Siemens Ag, 1000 Berlin Und 8000 Muenchen Holding device for small electrical components produced in series
US3655110A (en) * 1970-03-11 1972-04-11 Peter Hinteregger Kg Fa Closure fastener for hinged packages made of deep drawn plastic foil
US3661317A (en) * 1970-07-20 1972-05-09 Hikoji Noguchi Plastic container for eggs
US3786982A (en) * 1971-11-17 1974-01-22 Phillips Petroleum Co Thermoformed snap closures
US3800998A (en) * 1972-08-24 1974-04-02 Prent Corp Thermoformed container
NL7312645A (en) * 1972-09-23 1974-03-26
GB1455126A (en) * 1973-03-09 1976-11-10 Lunch Locker Systems Ltd Packaging containers
DE2557540A1 (en) * 1975-12-19 1977-06-30 Schneider Max Transport container for full sacks - has two hollow hinged halves subdivided by parallel webs

Also Published As

Publication number Publication date
EP0006993A2 (en) 1980-01-23
EP0006993A3 (en) 1980-03-05
US4225077A (en) 1980-09-30
DE2825837C3 (en) 1981-04-30
DE2825837B2 (en) 1980-05-14
DE2825837A1 (en) 1979-12-20

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