EP0010327A1 - Method for manufacturing a packaging container and packaging containers so manufactured - Google Patents

Method for manufacturing a packaging container and packaging containers so manufactured Download PDF

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Publication number
EP0010327A1
EP0010327A1 EP79200577A EP79200577A EP0010327A1 EP 0010327 A1 EP0010327 A1 EP 0010327A1 EP 79200577 A EP79200577 A EP 79200577A EP 79200577 A EP79200577 A EP 79200577A EP 0010327 A1 EP0010327 A1 EP 0010327A1
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EP
European Patent Office
Prior art keywords
edges
blank
fuselage
incisions
cover sheet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP79200577A
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German (de)
French (fr)
Inventor
Josef Detzel
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.)
Unilever PLC
Unilever NV
Original Assignee
Unilever PLC
Unilever NV
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Filing date
Publication date
Application filed by Unilever PLC, Unilever NV filed Critical Unilever PLC
Publication of EP0010327A1 publication Critical patent/EP0010327A1/en
Withdrawn legal-status Critical Current

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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
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/42—Details of containers or of foldable or erectable container blanks
    • B65D5/4266—Folding lines, score lines, crease lines

Definitions

  • the invention relates to a method for producing a packaging container with a hull made of corrugated cardboard covered on both sides and with a polygonal cross section with rounded edges, and to the packaging container produced in particular by the method.
  • a cardboard container with round edges is also known, in which the round edges are produced by pressing in longitudinal grooves (DE-OS 2,307,139).
  • the rounding is here between the longitudinal grooves and partly also to the side of them in the transition to the flat side walls.
  • the curvatures are interrupted by the creasing, and because of the great bending stiffness of corrugated cardboard sealed on both sides, creasing cannot be achieved with creases in this material Generate wise.
  • the invention is intended to create a method for producing packaging containers with a hull made of corrugated cardboard sealed on both sides and with clearly rounded edges, as well as such a container, whereby at the same time the aim is to stiffen the corrugated cardboard weakened to bend the round edges and the outer surface of the To improve the fuselage.
  • a cut of corrugated cardboard for the fuselage which is provided in the areas of the rounded edges to be formed in the outer cover layer with a plurality of cuts approximately parallel to the edge, to bend this cut together to form the round edges to form the fuselage, the incisions allow the outer cover layer to stretch at the edges, and a cover sheet made of paper, cardboard or plastic film is glued to the outer cover layer, which also covers the narrow expansion openings formed when the cut is bent out of the incisions and the weakened by the incisions outer top layer is stiffened at the edges.
  • the cover sheet can be printed beforehand and, if necessary, coated or the like. be refined. It is also possible to use a plastic film printed on the back as a cover sheet. A bottom part is attached to the body of the container.
  • glue is applied over the entire surface or in strips for the connection of the cover sheet to the blank on the side of the corrugated cardboard provided with the incisions or optionally also on the cover sheet and the cover sheet is brought up to this outer side and attached by means of the glue , and then the blank is bent into the shape of the fuselage before the glue sets, so that the cover sheet can still move on the blank during the bending.
  • the longitudinal seams between the ends of the blank made of corrugated cardboard and between the ends of the cover sheet are expediently made with a hot melt adhesive formed and solidified which the laim bound between the cover sheet and the blank.
  • the blank of corrugated cardboard which is provided with egg cuts on its outer side, is first bent to form the hull and glued to its longitudinal seam.
  • This fuselage is then inserted into a bottom part which, with a narrow edge surface, reaches out over the lower edge of the fuselage.
  • the bottom part is preferably deep-drawn from plastic.
  • the cover sheet is placed around the shaped hull and on the narrow edge surface of the bottom part and glued so that the cover sheet covers the entire height of the container body.
  • the round edges of the fuselage have a clearly shaped curvature, the radius of which is at least 10 mm on the inside of the fuselage.
  • the radius of curvature of the rounded edges is preferably 15 to 30 mm. Radii of curvature of more than 30 mm and even more than 50 mm are, however, possible.
  • the radii of curvature result from the width of the edge area provided with incisions.
  • the incisions in the outer cover layer run through in the edge areas at approximately the entire container height, provided the width of the edge area does not change with the height. However, the incisions are interrupted by narrow connecting bars.
  • the distance between the incisions, which are expediently parallel to one another, is 2 to 5 mm. A distance of the incisions of approximately 3 mm with a radius of curvature of approximately 25 mm seems to be the most favorable for the E-wave preferred as corrugated cardboard.
  • the corrugations of the corrugated cardboard, the axes of the radii of curvature of the rounded edges and the longitudinal seam run approximately parallel to the usually perpendicular axis of the container.
  • the side walls which are essentially flat surfaces, can also be inclined slightly inwards or outwards, as a result of which the incisions in the outer cover layer no longer run exactly parallel to the waves.
  • the curvature ratio can also increase or decrease over that of the container, for which purpose Increase or decrease the width of the edge area provided with incisions accordingly.
  • the manufacturing processes allow the overlapping longitudinal seams to be moved between the ends of the blank made of corrugated cardboard and between the ends of the cover sheet, so that only one edge of the thin cover sheet is externally visible on the seam.
  • the blank consists of corrugated cardboard with an outer cover layer 4, shafts 5 and an inner cover layer 6, which forms the inside of the fuselage in the finished container.
  • the blank 1 is provided on its outer side in the areas of the round edges 2 to be formed with incisions 3 in the outer cover layer 4, which are in FIG. 1 on the lower side of the blank shown.
  • the waves 5 do not need to be weakened by cuts.
  • the incisions 3 run approximately parallel to the edges 2 and at a distance of 2 to 5 mm over the entire height of the packaging container.
  • the outer cover layer 4 of the blank 1 is glued in strips and a cover sheet 7 is attached to the glue.
  • the blank 1 is then folded, as indicated in FIG. 2 by the arrows A.
  • the inner top layer 6 is bent at the round edges, the waves 5 stretched a little, and the outer cover layer 4 is slightly apart at the incisions 3.
  • the glue has not yet set when the blank is bent, so that the cover sheet 7 can still move on the outer cover layer 4 in accordance with the stretching of the outer cover layer 4 at the round edges 2.
  • a hot melt adhesive is applied through nozzles 8 to the ends 9 and 11 of the blank 1 and the cover sheet 7 and the other ends 10, 12 are pressed onto the aforementioned, the longitudinal seams 13 and 14 being formed.
  • the overlapping longitudinal seam 13 between the ends 9, 10 of the cover sheet 7 and the likewise overlapped and compressed longitudinal seam 14 between the ends 11, 12 of the blank 1 made of corrugated cardboard are offset from one another, so that only the overlap joint of the cover sheet is visible on the outside. Pressing the two ends of the corrugated cardboard together is expedient so that the inner side of the container body forms a surface that is as smooth as possible and also that the outer side of the corrugated cardboard located under the cover sheet has no shoulder.
  • the glue has set between the cover sheet 7 and the outer cover layer 4, the container body formed in this way is also dimensionally stable on its curved edges. It is connected during or after the setting of the glue to a bottom part, not shown in FIGS. 1 to 3, which is formed from cardboard or preferably from a plastic film.
  • FIG. 4 Another possibility is to first bend the blank 1 provided with the cuts 3 in the outer cover layer 4 in the region of the edges 2 and to form the longitudinal seam 14 (FIG. 4).
  • This hull which is not yet dimensionally stable, is now inserted into a base part 15, which engages with a narrow edge surface 16 on the outside over the lower edge of the fuselage (FIG. 5).
  • the cover sheet 7 is now glued onto the hull formed from the blank 1 and the edge surface 16 of the base part, so that the container is covered over its entire height by the cover sheet (FIG. 6). In this way, the cover sheet 7 helps to fasten the bottom to the container body and to improve the sealing of the container between the body and the base part. If a sealable cover sheet 7 is used, it can also be sealed to the edge surface 16 will.
  • connecting webs 17 which receive a connection between the strips 18 of the outer cover layer 4 separated by the cuts 3.
  • these connecting webs 17 should be offset from incision to incision, as indicated in FIG. 1.
  • the length of an incision between two connecting webs is, for example, 50 mm and each web has a width of approximately 1 to 2 mm, measured in the direction of the incisions.
  • the expansion of the outer cover layer as a result of the incisions enables the rounded radii to be easily formed with smooth transitions into the flat side surfaces. Covering the rounded edges weakened by the incisions by means of a cover sheet, however, gives the container excellent dimensional stability. By choosing a suitable cover sheet, the container can be refined in practically any desired manner and, for example, also protected against the ingress of moisture.
  • the packaging container is thus characterized in that its hull consists of corrugated cardboard, which is relatively cheap, but still has a very high strength, and that in the area of the rounded edges 2 of the hull in the outer cover layer 4 due to parallel incisions 3 expansion openings have arisen and that in particular at least in the area of the rounded edges 2 a cover sheet 7 covering these expansion openings is attached to the fuselage.
  • the container is preferably made by one of the methods described above, but other methods are also possible in which e.g. only the rounded edges are covered in order to close the expansion openings or where a stretchable cover sheet is already in front of the. Bending together the fuselage is at least partially firmly connected to the flat blank.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cartons (AREA)
  • Making Paper Articles (AREA)

Abstract

In a method for manufacturing a packaging container having a polygonal cross-section and rounded edges, a blank (1) is used which is made of corrugated card covered on both sides. In order that the round edges (2) can be bent, incisions (3) are made in the outer covering layer of the corrugated card. The incisions are covered by applying a covering sheet (7) during or after the bending of the round edges, by which means these edges are stabilised at the same time in the bent shape. The covering sheet (7) can initially be attached to the flat blank (1) by means of glue and is bent with said blank, in which case it is displaced on the blank (1). Then the longitudinal seams are formed by a quick-hardening adhesive before the glue has set between the covering sheet and the blank. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren zum Herstellen eines Verpackungsbehälters mit einem Rumpf aus beidseitig gedeckter Wellpappe und mit polygonalem Querschnitt mit abgerundeten Kanten sowie die insbesondere nach dem Verfahren hergestellten Verpackungsbehälter.The invention relates to a method for producing a packaging container with a hull made of corrugated cardboard covered on both sides and with a polygonal cross section with rounded edges, and to the packaging container produced in particular by the method.

In der älteren deutschen Patentanmeldung P 27 40 983 wird ein Verpackungsbehälter aus Wellpappe beschrieben, dessen Kanten dadurch abgerundet werden, dass die innere Decklage durch zur Kante parallele Schwächungszonen beispielsweise in Form von Einschnitten geschwächt wird. Die äussere Decklage läuft um die gebogene Kante herum, ohne durch Knicke oder Ri 11 ungen unterbrochen zu sein. Diese Lösung besitzt jedoch verschiedene Nachteile. Ausserdem sind die Möglichkeiten, die Aussenfläche des Behälters zu bedrucken, durch die Qualität der handelsüblichen Wellpappe begrenzt.In the older German patent application P 27 40 983 a packaging container made of corrugated cardboard is described, the edges of which are rounded off by weakening the inner cover layer by weakening zones parallel to the edge, for example in the form of incisions. The outer cover layer runs around the curved edge without being interrupted by kinks or wrinkles. However, this solution has several disadvantages. In addition, the possibilities of printing on the outer surface of the container are limited by the quality of the standard corrugated cardboard.

Es ist ferner ein Kartonbehälter mit runden Kanten bekannt, bei dem die runden Kanten durch Eindrücken von Längsrillen erzeugt werden (DE-OS 2.307.139). Die Abrundung befindet sich hier zwischen den Längsrillen und zum Teil auch noch seitlich von ihnen im Ubergang zu den ebenen Seitenwänden. Durch die Rillungen werden die Rundungen unterbrochen, und wegen der grossen Biegesteifigkeit von beidseitig gedichter Wellpappe lassen sich bei diesem Material Rundunger nicht durch Rillungen in der vorbeschriet Weise erzeugen.A cardboard container with round edges is also known, in which the round edges are produced by pressing in longitudinal grooves (DE-OS 2,307,139). The rounding is here between the longitudinal grooves and partly also to the side of them in the transition to the flat side walls. The curvatures are interrupted by the creasing, and because of the great bending stiffness of corrugated cardboard sealed on both sides, creasing cannot be achieved with creases in this material Generate wise.

Durch die Erfindung sollen ein Verfahren zur Herstellung von Verpackungsbehättern mit einem Rumpf aus beidseitig gedichter Wellpappe und mit deutlich abgerundeten Kanten sowie auch ein solcher Behälter geschaffen werden, wobei zugleich angestrebt wird, die zum Biegen der runden Kanten geschwächte Wellpappe wieder zu versteifen und die Aussenfläche des Rumpfes zu verbessern.The invention is intended to create a method for producing packaging containers with a hull made of corrugated cardboard sealed on both sides and with clearly rounded edges, as well as such a container, whereby at the same time the aim is to stiffen the corrugated cardboard weakened to bend the round edges and the outer surface of the To improve the fuselage.

Hierzu ist vorgesehen, einen Zuschnitt aus Wellpappe für den Rumpf zu verwenden, der in den Bereichen der zu bildenden abgerundeten Kanten in der äusseren Decklage mit einer Vielzahl von zur Kante etwa parallelen Einschnitten versehen ist, diesen Zuschnitt unter Formung der runden Kanten zum Rumpf zusammenzubiegen, wobei die Einschnitte eine Dehnung der äusseren Decklage an den Kanten ermöglichen, und ein Deckblatt aus Papier, Karton oder Kunststoffolie auf die äussere Decklage zu kleben, wodurch auch die sich beim Biegen des Zuschnitts aus den Einschnitten bildenden schmalen Dehnungsöffnungen bedeckt und die durch die Einschnitte geschwächte äussere Decklage an den Kanten versteift wird. Das Deckblatt kann vorher bedruckt und gegebenenfalls durch Beschichtungen o.ä. veredelt sein. Auch ist die Verwendung einer auf der Rückseite bedruckten Kunststoffolie als Deckblatt möglich. An den Rumpf desBehälters wird ein Bodenteil angefügt.For this purpose, it is intended to use a cut of corrugated cardboard for the fuselage, which is provided in the areas of the rounded edges to be formed in the outer cover layer with a plurality of cuts approximately parallel to the edge, to bend this cut together to form the round edges to form the fuselage, the incisions allow the outer cover layer to stretch at the edges, and a cover sheet made of paper, cardboard or plastic film is glued to the outer cover layer, which also covers the narrow expansion openings formed when the cut is bent out of the incisions and the weakened by the incisions outer top layer is stiffened at the edges. The cover sheet can be printed beforehand and, if necessary, coated or the like. be refined. It is also possible to use a plastic film printed on the back as a cover sheet. A bottom part is attached to the body of the container.

Bei einer bevorzugten Ausführungsform des vorstehend beschriebenen Verfahrens wird für die Verbindung des Deckblatts mit dem Zuschnitt auf die mit den Einschnitten versehene Seite der Wellpappe oder gegebenenfalls auch auf dem Deckblatt ganzflächig oder streifenweise Leim aufgetragen und das Deckblatt an diese äussere Seite herangeführt und mittels des Leims angeheftet, und darauf wird der Zuschnitt in die Form des Rumpfes gebogen,ehe der Leim abbindet, so dass sich das Deckblatt noch bei dem Biegen auf dem Zuschnitt verschieben kann. Die Längsnähte zwischen den Enden des Zuschnitts aus Wellpappe und zwischen den Enden des Deckblatts werden zweckmässigerweise mit einem Hitzeschmelzklebstoff geoildet und verfestigen sich, the der Laim zwischen Deckblatt und Zuschnitt aogebunden hat.In a preferred embodiment of the method described above, glue is applied over the entire surface or in strips for the connection of the cover sheet to the blank on the side of the corrugated cardboard provided with the incisions or optionally also on the cover sheet and the cover sheet is brought up to this outer side and attached by means of the glue , and then the blank is bent into the shape of the fuselage before the glue sets, so that the cover sheet can still move on the blank during the bending. The longitudinal seams between the ends of the blank made of corrugated cardboard and between the ends of the cover sheet are expediently made with a hot melt adhesive formed and solidified which the laim bound between the cover sheet and the blank.

Bei einer anderen Ausgestaltung des Verfahrens wird zunächst der auf seiner dusseren Seite mit Eiaschnitten versehene Zuschnitt aus Wellpappe zum Rumpt gebogen und an seiner Längsnaht verklebt. Dieser Rumpf wird dann in ein Bodenteil eingesetzt, das mit einer schmalen Randfläche aussen über den unteren Rand des Rumpfes greift. Das Bodenteil ist vorzugsweise aus Kunststoff tiefgezogen. Das Deckblatt wird um den geformten Rumpf und auf die schmale Randfläche des Bödenteils gelegt und festgeklebt, so dass das Deckblatt den Behälterrumpf auf seiner ganzen Höhe bekleidet.In another embodiment of the method, the blank of corrugated cardboard, which is provided with egg cuts on its outer side, is first bent to form the hull and glued to its longitudinal seam. This fuselage is then inserted into a bottom part which, with a narrow edge surface, reaches out over the lower edge of the fuselage. The bottom part is preferably deep-drawn from plastic. The cover sheet is placed around the shaped hull and on the narrow edge surface of the bottom part and glued so that the cover sheet covers the entire height of the container body.

Die runden Kanten des Rumpfes besitzen eine deutliche geformte Krümmung, deren Radius an der Innenseite des Rumpfes mindestens 10 mm beträgt. Der Krümmungsradius der abgerundeten Kanten beträgt vorzugsweise 15 bis 30 mm. Krümmungsradien von über 30 mm und sogar mehr als 50 mm sind jedoch möglich. Die Krümmungsradien ergeben sich aus der Breite des mit Einschnitten versehenen Kantenbereichs. Die Einschnitte in der äusseren Decklage laufen in den Kantenbereichen auf etwa der gesamten Behälterhöhe durch, sofern sich die Breite des Kantenbereichs nicht mit der Höhe ändert. Die Einschnitte sind jedoch von schmalen Verbindungsstegen unterbrochen. Der Abstand zwischen den zweckmässigerweise zueinander parallelen Einschnitten beträgt 2 bis 5 mm. Für die als Wellpappe bevorzugte E-Welle scheint ein Abstand der Einschnitte von etwa 3 mm bei einem Krümmungsradius von etwa 25 mm am günstigsten zu sein.The round edges of the fuselage have a clearly shaped curvature, the radius of which is at least 10 mm on the inside of the fuselage. The radius of curvature of the rounded edges is preferably 15 to 30 mm. Radii of curvature of more than 30 mm and even more than 50 mm are, however, possible. The radii of curvature result from the width of the edge area provided with incisions. The incisions in the outer cover layer run through in the edge areas at approximately the entire container height, provided the width of the edge area does not change with the height. However, the incisions are interrupted by narrow connecting bars. The distance between the incisions, which are expediently parallel to one another, is 2 to 5 mm. A distance of the incisions of approximately 3 mm with a radius of curvature of approximately 25 mm seems to be the most favorable for the E-wave preferred as corrugated cardboard.

Bei dem Verpackungsbehälter laufen die Wellen der Wellpappe, die Achsen der Krümmungsradien der abgerundeten Kanten und die Längsnaht etwa parallel zur üblicherweise lotrechten Behälterachse. Die Seitenwände, die im wesentlichen ebene Flächen sind, können jedoch auch ein wenig nach innen oder aussen geneigt sein, wodurch die Einschnitte in der äusseren Decklage nicht mehr genau parallel zu den Wellen laufen. Auch kann der Krümmungs- ratus über die der des Behälters Zu- oder abnehmen, wozu die Breite des mit Einschnitten versehenen Kantenbereichs entsprechend zu vergrössern bzw. zu verkleinern ist.In the packaging container, the corrugations of the corrugated cardboard, the axes of the radii of curvature of the rounded edges and the longitudinal seam run approximately parallel to the usually perpendicular axis of the container. However, the side walls, which are essentially flat surfaces, can also be inclined slightly inwards or outwards, as a result of which the incisions in the outer cover layer no longer run exactly parallel to the waves. The curvature ratio can also increase or decrease over that of the container, for which purpose Increase or decrease the width of the edge area provided with incisions accordingly.

Die Herstellungsverfahren gestatten es, die überlappenden Längsnähte zwischen den Enden des Zuschnittes aus Wellpappe und zwischen den Enden des Deckblattes zu versetzen, so dass an der Naht äusserlich nur eine Kante des dünnen Deckblatts sichtbar ist.The manufacturing processes allow the overlapping longitudinal seams to be moved between the ends of the blank made of corrugated cardboard and between the ends of the cover sheet, so that only one edge of the thin cover sheet is externally visible on the seam.

Weitere Einzelheiten des Verfahrens und der Verpackungsbehälter werden anhand der Zeichnungen beschrieben. Es zeigen:

  • Fig. 1 einen Zuschnitt mit bereits angeheftetem Deckblatt;
  • Fig. 2 die Bildung der Längsnähte bei einem teilweise gebogenen Zuschnitt nacht Fig. 1;
  • Fig. 3 einen Schnitt durch einen Teil einer Behälterwand;
  • Fi g. 4 einen ohne Deckblatt zusammengebogenen und mit einer Längsnaht verklebten Rumpf;
  • Fig. 5 den Rumpf nach Fig. 4 mit einem Bodenteil ;
  • Fig. 6 einen mit einem Deckblatt versehenen Behälter aus den Teilen nach Fig. 5.
Further details of the method and the packaging container are described with reference to the drawings. Show it:
  • 1 shows a blank with the cover sheet already attached;
  • Figure 2 shows the formation of the longitudinal seams in a partially curved blank night Fig. 1.
  • 3 shows a section through part of a container wall;
  • Fi g. 4 a fuselage bent without a cover sheet and glued with a longitudinal seam;
  • 5 shows the fuselage according to FIG. 4 with a bottom part;
  • 6 shows a container provided with a cover sheet from the parts according to FIG. 5.

Der Zuschnitt besteht aus einer Wellpappe mit einer äusseren Decklage 4, Wellen 5 und einer inneren Decklage 6, welche beim fertigen Behälter die Innenseite des Rumpfes bildet. Der Zuschnitt 1 ist auf seiner äusseren Seite in den Bereichen der zu bildenden runden Kanten 2 mit Einschnitten 3 in der äusseren Decklage 4 versehen, die sich in Fig. 1 auf der unteren Seite des gezeigten Zuschnitts befinden. Die Wellen 5 brauchen nicht durch Einschnitte geschwächt zu werden. Die Einschnitte 3 verlaufen etwa parallel zu den Kanten 2 und im Abstand von 2 bis 5 mm über die ganze Höhe des Verpackungsbehälters.The blank consists of corrugated cardboard with an outer cover layer 4, shafts 5 and an inner cover layer 6, which forms the inside of the fuselage in the finished container. The blank 1 is provided on its outer side in the areas of the round edges 2 to be formed with incisions 3 in the outer cover layer 4, which are in FIG. 1 on the lower side of the blank shown. The waves 5 do not need to be weakened by cuts. The incisions 3 run approximately parallel to the edges 2 and at a distance of 2 to 5 mm over the entire height of the packaging container.

Zur Herstellung eines Behälters wird die äussere Decklage 4 des Zuschnitts 1 streifenweise beleimt und ein Deckblatt 7 auf dem Leim angeheftet. Der Zuschnitt 1 wird dann, wir in Fig. 2 durch die Pfeile A angedeutet, zusammengefaltet. Dabei wird an den runden Kanten die innere Decklage 6 gebogen, die Wellen 5 werden ein wenig gestreckt, und die äussere Decklage 4 wird an den Einschnitten 3 etwas auseinandergezcaen. Beim Biegen des Zuschnitts hat der Leim noch nicht abgebunden, so dass sich das Deckblatt 7 noch entsprechend der Dehnung der äusseren Decklage 4 an den runden Kanten 2 auf der äusseren Decklage 4 verschieben kann. Durch Düsen 8 wird ein Hitzeschmelzkleber auf die Enden 9 und 11 von Zuschnitt 1 und Deckblatt 7 aufgebracht und die anderen Enden 10, 12 werden auf die zuvor genannten gedrückt, wobei die Längsnähte 13 und 14 gebildet werden. Die überlappende Längsnaht 13 zwischen den Enden 9, 10 des Deckblatts 7 und die ebenfalls überlappte und zusammengepresste Längsnaht 14 zwischen den Enden 11, 12 des Zuschnitts 1 aus Wellpappe sind gegeneinander versetzt, so dass an der Aussenseite nur der Uberlappungsstoss des Deckblatts sichtbar ist. Ein Zusammenpressen derbeiden Enden der Wellpappe ist zweckmässig, damit die innere Seite des Behälterrumpfeseine möglichst glatte Fläche bildet und auch damit die unter dem Deckblatt befindliche äussere Seite der Wellpappe keinen Absatz aufweist. Wenn der Leim zwischen Deckblatt 7 und äusserer Decklage 4 abgebunden hat, ist der so gebildete Behälterrumpf auch an seinen gebogenen Kanten formfest. Er wird während oder nach dem Abbinden des Leimes mit einem in Fig. 1 bis 3 nicht gezeigten Bodenteil verbunden, das aus Pappe oder vorzugsweise aus einer Kunststofffolie geformt ist.To produce a container, the outer cover layer 4 of the blank 1 is glued in strips and a cover sheet 7 is attached to the glue. The blank 1 is then folded, as indicated in FIG. 2 by the arrows A. The inner top layer 6 is bent at the round edges, the waves 5 stretched a little, and the outer cover layer 4 is slightly apart at the incisions 3. The glue has not yet set when the blank is bent, so that the cover sheet 7 can still move on the outer cover layer 4 in accordance with the stretching of the outer cover layer 4 at the round edges 2. A hot melt adhesive is applied through nozzles 8 to the ends 9 and 11 of the blank 1 and the cover sheet 7 and the other ends 10, 12 are pressed onto the aforementioned, the longitudinal seams 13 and 14 being formed. The overlapping longitudinal seam 13 between the ends 9, 10 of the cover sheet 7 and the likewise overlapped and compressed longitudinal seam 14 between the ends 11, 12 of the blank 1 made of corrugated cardboard are offset from one another, so that only the overlap joint of the cover sheet is visible on the outside. Pressing the two ends of the corrugated cardboard together is expedient so that the inner side of the container body forms a surface that is as smooth as possible and also that the outer side of the corrugated cardboard located under the cover sheet has no shoulder. When the glue has set between the cover sheet 7 and the outer cover layer 4, the container body formed in this way is also dimensionally stable on its curved edges. It is connected during or after the setting of the glue to a bottom part, not shown in FIGS. 1 to 3, which is formed from cardboard or preferably from a plastic film.

Eine andere Möglichkeit besteht darin, den mit den Einschnitten 3 in der äusseren Decklage 4 im Bereich der Kanten 2 versehenen Zuschnitt 1 zunächst zu einem Behälterrumpf zusammenzubiegen und die Längsnaht 14 zu bilden (Fig. 4). Dieser noch nicht formfeste Rumpf wird nun in ein Bodenteil 15 eingesetzt, welches mit einer schmalen Randfläche 16 aussen über den unteren Rand des Rumpfes greift (Fig. 5). Auf den aus dem Zuschnitt 1 gebildeten Rumpf und die Randfläche 16 des Bodenteils wird nun das Deckblatt 7 geklebt, so dass der Behälter auf seiner ganzen Höhe von dem Deckblatt bedeckt ist (Fig. 6). Das Deckblatt 7 trägt auf diese Weise dazu bei, den Boden am Behälterrumpf zu befestigen und die Abdichtung des Behälters zwischen Rumpf und Bodenteil zu verbessern Bei Verwendung eines siegelfähigen Deckblatts 7 kann dieses aech an die Randfläche 16 angesiegelt werden.Another possibility is to first bend the blank 1 provided with the cuts 3 in the outer cover layer 4 in the region of the edges 2 and to form the longitudinal seam 14 (FIG. 4). This hull, which is not yet dimensionally stable, is now inserted into a base part 15, which engages with a narrow edge surface 16 on the outside over the lower edge of the fuselage (FIG. 5). The cover sheet 7 is now glued onto the hull formed from the blank 1 and the edge surface 16 of the base part, so that the container is covered over its entire height by the cover sheet (FIG. 6). In this way, the cover sheet 7 helps to fasten the bottom to the container body and to improve the sealing of the container between the body and the base part. If a sealable cover sheet 7 is used, it can also be sealed to the edge surface 16 will.

Es ist zweckmässig, die Einschnitte 3 in der äusseren Decklage 4 durch schmale Verbindungsstege 17 zu unterbrechen, die einen Zusammenhang zwischen den durch die Einschnitte 3 getrennten Streifen 18 der äusseren Decklage 4 erhalten. Diese Verbindungsstege 17 sollen jedoch von Einschnitt zu Einschnitt versetzt sein wie in Fig. 1 angedeutet ist. Die Länge eines Einschnitts zwischen zwei Verbindungsstegen beträgt beispielsweise 50 mm und jeder Steg hat eine Breite von etwa 1 bis 2 mm,gemessen in der Richtung der Einschnitte.It is expedient to interrupt the incisions 3 in the outer cover layer 4 by narrow connecting webs 17, which receive a connection between the strips 18 of the outer cover layer 4 separated by the cuts 3. However, these connecting webs 17 should be offset from incision to incision, as indicated in FIG. 1. The length of an incision between two connecting webs is, for example, 50 mm and each web has a width of approximately 1 to 2 mm, measured in the direction of the incisions.

Die Dehnung der äusserenDecklage infolge der Einschnitte ermöglicht eine einfache Bildung der Abrundungsradien mit sanften Ubergangen in die ebenen Seitenflächen. Die Abdeckung der durch die Einschnitte an sich geschwächten, abgerundeten Kanten mittels eines Deckblattes gibt dem Behälter jedoch eine ausgezeichnete Formstabilität. Durch die Wahl eines geeigneten Deckblatts kann der Behälter in praktisch jeder gewünschten Weise veredelt und beispielsweise auch gegen das Eindringen von Feuchtigkeit geschützt werden.The expansion of the outer cover layer as a result of the incisions enables the rounded radii to be easily formed with smooth transitions into the flat side surfaces. Covering the rounded edges weakened by the incisions by means of a cover sheet, however, gives the container excellent dimensional stability. By choosing a suitable cover sheet, the container can be refined in practically any desired manner and, for example, also protected against the ingress of moisture.

Der Verpackungsbehälter zeichnet sich somit dadurch aus, dass sein Rumpf aus einer Wellpappe besteht, die verhältnismässig billig ist, aber doch eine sehr grosse Festigkeit besitzt, und dass im Bereich der abgerundeten Kanten 2 des Rumpfes in der äusseren Decklage 4 infolge von parallelen Einschnitten 3 Dehnungsöffnungen entstanden sind und dass insbesondere wenigstens im Bereich der abgerundeten Kanten 2 auf dem Rumpf ein diese Dehnungsöffnungen abdeckendes Deckblatt 7 angebracht ist. Der Behälter wird vorzugsweise nach einen der vorstehend beschriebenen Verfahren hergestellt, jedoch sind auch andere Verfahren möglich, bei denen z.B. nur die abgerundeten Kanten abgedeckt werden, um die Dehnungsöffnungen zu verschliessen oder bei denen ein dehnbares Deckblatt schon vor dem. Zusammenbiegen des Rumpfes wenigstens stellenweise mit dem flachen Zuschnitt fest verbunden wird.The packaging container is thus characterized in that its hull consists of corrugated cardboard, which is relatively cheap, but still has a very high strength, and that in the area of the rounded edges 2 of the hull in the outer cover layer 4 due to parallel incisions 3 expansion openings have arisen and that in particular at least in the area of the rounded edges 2 a cover sheet 7 covering these expansion openings is attached to the fuselage. The container is preferably made by one of the methods described above, but other methods are also possible in which e.g. only the rounded edges are covered in order to close the expansion openings or where a stretchable cover sheet is already in front of the. Bending together the fuselage is at least partially firmly connected to the flat blank.

Claims (19)

1. Verfahren zum Herstellen eines Verpackungsbehälters mit einem Rampf von polygonalem Querschnitt und mit abgerundeten Kanten unter Verwendung eines Zuschnitts aus Wellpappe, welche in den Bereichen der abgerundeten Kanten mit einer Vielzahl von zur Kante parallelen Schwächungslinien in Form von Einschnitten in einer Decklage versehen ist, wobei der Zuschnitt für den Rumpf unter Formung der runden Kanten zusammengebogen wird und seine Enden durch eine Längsnaht verbunden werden und anschliessend an den Rumpf ein Bodenteil angefügt wird, dadurch gekennzeichnet, dass ein Zuschnitt mit die Formung runder Kanten ermöglichenden Einschnitten in der äusseren Decklage der Wellpappe verwendet wird und dass auf der Aussenseite des Rumpfes ein Deckblatt angebracht wird urddie sich beim Biegen des Zuschnitts an den runden Kanten in der äusseren Decklage öffnenden Einschnitte durch Aufkleben des Deckblatts auf den Rumpf abgedeckt und zugleich die gebogenen runden Kanten versteift werden.1. A method for producing a packaging container with a ramp of polygonal cross-section and with rounded edges using a blank made of corrugated cardboard, which is provided in the areas of the rounded edges with a plurality of lines of weakness parallel to the edge in the form of incisions in a top layer, wherein the cut for the fuselage is bent together to form the round edges and its ends are connected by a longitudinal seam and then a base part is attached to the fuselage, characterized in that a cut with incisions which enable the formation of round edges is used in the outer cover layer of the corrugated cardboard and that a cover sheet is attached to the outside of the fuselage and the incisions that open when the cut is bent on the round edges in the outer cover layer are covered by gluing the cover sheet onto the fuselage and at the same time the curved round edges are stiffened. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass auf die mit den Einschnitten in der äusseren Decklage versehene Seite des Zuschnitts im Bereich der zu formenden runden Kanten des Zuschnitts Leim aufgetragen und ein auf dem Leim verschiebbares Deckblatt angeheftet wird und darauf der Zuschnitt zum Rumpf zusammengebogen wird, ehe der Leim abbindet.2. The method according to claim 1, characterized in that glue is applied to the side of the blank provided with the incisions in the outer cover layer in the region of the round edges of the blank to be formed, and a cover sheet which is displaceable on the glue is attached and then the blank to the fuselage is bent together before the glue sets. 3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass die Längsnähte des Zuschnitts und des Deckblatts mittels eines Hitzeschmelzklebers gebildet werden, ehe der Leim zwischen dem Deckblatt und dem Zuschnitt abgebunden hat.3. The method according to claim 2, characterized in that the longitudinal seams of the blank and the cover sheet are formed by means of a hot melt adhesive before the glue has set between the cover sheet and the blank. 4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der mit Einschnitten in der äusseren Decklage im Bereich der zu formenden runden Kanten versehene Zuschnitt zum Rumpf zusammengebogen, an seiner Längsnaht verklebt und in ein Bodenteil eingesetzt wird, das mit einer schmalen Randfläche über den unteren Rand des Rumpfes greift und dass daraufhin das Deckblatt um den Rumpf und auf die Randfläche des Bodenteils geklebt wird.4. The method according to claim 1, characterized in that the cut provided with incisions in the outer cover layer in the region of the round edges to be formed to the fuselage, glued to its longitudinal seam and inserted into a bottom part which has a narrow edge surface over the lower Edge of the fuselage engages and that the cover sheet is then glued around the fuselage and on the edge surface of the bottom part. 5. Verfahren nach einem der Ansprüche i Dis 4, darduch gekennzeichnet, dass die beiden Längsnänte zwischen Zuschnitts aus Wellpappe und zwischen den Enden des gegeneinander versetzt am Umfang des Rumpfes ausgefüre5. The method according to any one of claims i Dis 4, characterized in that the two longitudinal edges between the cut from corrugated cardboard and between the ends of the offset against each other on the circumference of the fuselage 6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die runden Kanten mit Krümmungsradien von wenigstens 10 mm gebogen werden.6. The method according to any one of claims 1 to 5, characterized in that the round edges are bent with radii of curvature of at least 10 mm. 7. Verpackungsbehälter, insbesondere nach einem der Ansprüche 1 bis 6, mit polygonalem Querschnitt mit abgerundeten Kanten, bestehend aus einem zusammengebogenen Rumpf mit einer Längsnaht und einem mit diesem verbundenen Bodenteil, dadurch gekennzeichnet, dass der Rumpf aus Wellpappe besteht, in deren äusserer Decklage (4) im Bereich der abgerundeten Kanten (2) infolge von parallelen Einschnitten (3) Dehnungsöffnungen entstanden sind und sich auf dem Rumpf wenigstens im Bereich der abgerundeten Kanten (2) ein die Dehnungsöffnungen abdeckendes und die Krümmung dieser Kanten stabilisierendes Deckblatt (7) befindet.7. Packaging container, in particular according to one of claims 1 to 6, with a polygonal cross-section with rounded edges, consisting of a bent hull with a longitudinal seam and a bottom part connected to this, characterized in that the hull consists of corrugated cardboard, in its outer cover layer ( 4) expansion openings have arisen in the region of the rounded edges (2) as a result of parallel incisions (3) and there is a cover sheet (7) covering the expansion openings and stabilizing the curvature of these edges at least in the region of the rounded edges (2). 4. A process as claimed in claim 1 or claim 2, characterized in that the polyalkoxylate lubricating oil is a C7 to C18 alcohol ethoxylate having an average from 3 to 10 moles of ethylene oxide per mole of alcohol.4. A process as claimed in claim 1 or claim 2, characterized in that the polyalkoxylate lubricating oil is a C 7 to C 18 alcohol ethoxylate having an average from 3 to 10 moles of ethylene oxide per mole of alcohol. 5. A process as claimed in any one of claims 1 to 4, characterized in that the carboxylic acid or salt comprises from 14 to 18 carbon atoms.5. A process as claimed in any one of claims 1 to 4, characterized in that the carboxylic acid or salt comprises from 14 to 18 carbon atoms. 6. A process as claimed in claim 5, characterized in that the lubricating oil composition comprises oleic acid or stearic acid.6. A process as claimed in claim 5, characterized in that the lubricating oil composition comprises oleic acid or stearic acid. 7. A process as claimed in any one of claims 1 to 6, characterized in that the lubricating oil composition comprises from 0.001 to to 10%w of the carboxylic acid or salt, based on the weight of polyalkoxylate lubricating oil.7. A process as claimed in any one of claims 1 to 6, characterized in that the lubricating oil composition comprises from 0.001 to to 10% w of the carboxylic acid or salt, based on the weight of polyalkoxylate lubricating oil. 8. A process as claimed in any one of claims 1 to 7, characterized in that the lubricating oil composition also comprises an anti-oxidant and/or a corrosion inhibitor and/or a wetting agent and/or water.8. A process as claimed in any one of claims 1 to 7, characterized in that the lubricating oil composition also comprises an anti-oxidant and / or a corrosion inhibitor and / or a wetting agent and / or water. 9. A process as claimed in claim 8, characterized in that the corrosion inhibitor is a salt of benzoic acid or a salt of a N-acylsarcosine, wherein the acyl group is derived fraa a saturated and/or unsaturated C8 to C22 fatty acid.9. A process as claimed in claim 8, characterized in that the corrosion inhibitor is a salt of benzoic acid or a salt of a N-acylsarcosine, wherein the acyl group is derived fraa a saturated and / or unsaturated C 8 to C 22 fatty acid. 10. A process as claimed in any one of claims 1 to 9, characterized in that the amount of lubricating oil composition is from 0.25% to 10%w based on the weight of the primary backing fabric.10. A process as claimed in any one of claims 1 to 9, characterized in that the amount of lubricating oil composition is from 0.25% to 10% w based on the weight of the primary backing fabric. 11. A process as claimed in any one of claims 1 to 10, characterized in that the primary backing fabric is a woven polypropylene primary backing fabric.11. A process as claimed in any one of claims 1 to 10, characterized in that the primary backing fabric is a woven polypropylene primary backing fabric. -12. A lubricating oil composition as defined in any one of claims 1 to 9.-12. A lubricating oil composition as defined in any one of claims 1 to 9. 13. A primary backing fabric having a coating of a lubricating oil composition as defined in claim 12.13. A primary backing fabric having a coating of a lubricating oil composition as defined in claim 12. 14. A primary backing fabric as claimed in claim 13, characterized in that the amount of lubricating oil composition is from 0.25% to 10%w based on the weight of the primary backing fabric.14. A primary backing fabric as claimed in claim 13, characterized in that the amount of lubricating oil composition is from 0.25% to 10% w based on the weight of the primary backing fabric. 15. A primary backing fabric as claimed in claim 13 er claim 14, characterized in that the primary backing fabric is a woven polypropylene primary backing fabric.15. A primary backing fabric as claimed in claim 13 he claim 14, characterized in that the primary backing fabric is a woven polypropylene primary backing fabric.
EP79200577A 1978-10-12 1979-10-10 Method for manufacturing a packaging container and packaging containers so manufactured Withdrawn EP0010327A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2844524 1978-10-12
DE19782844524 DE2844524A1 (en) 1978-10-12 1978-10-12 METHOD FOR PRODUCING A PACKAGING CONTAINER AND PACKAGING CONTAINER MADE THEREOF

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE675978C (en) * 1937-03-28 1939-05-23 Jagenberg Werke Ag Paper container and process for its manufacture
US2561391A (en) * 1946-02-12 1951-07-24 American Can Co Frozen food container
US2904238A (en) * 1956-11-29 1959-09-15 Cambridge Paper Box Company Prewrapped box
FR1559850A (en) * 1968-01-26 1969-03-14
US3780933A (en) * 1972-04-12 1973-12-25 Gen Motors Corp Wrapper for a sheet metal article

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE671344C (en) * 1937-10-21 1939-02-06 Jagenberg Werke Ag Cut of cardboard or the like for boxes or the like, as well as a method and device for its production
DE2307139A1 (en) * 1973-02-14 1974-08-22 Bosch Verpackungsmaschinen METHOD OF MANUFACTURING PACKAGING CONTAINERS AND PACKAGING CONTAINERS MANUFACTURED BY THE METHOD

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE675978C (en) * 1937-03-28 1939-05-23 Jagenberg Werke Ag Paper container and process for its manufacture
US2561391A (en) * 1946-02-12 1951-07-24 American Can Co Frozen food container
US2904238A (en) * 1956-11-29 1959-09-15 Cambridge Paper Box Company Prewrapped box
FR1559850A (en) * 1968-01-26 1969-03-14
US3780933A (en) * 1972-04-12 1973-12-25 Gen Motors Corp Wrapper for a sheet metal article

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