EP2436613A1 - Folding box - Google Patents

Abstract

The folding box is made of a corrugated board, where a side wall (2) is formed by two overlapping and interconnected sidewall portions (2.1,2.2). Multiple connection strips (6,7,8,9) are designed in an arcuated curved manner, and are connected with longitudinal sides of two adjacent side walls (3,4,5) through side wall fold lines (10.1,10.2,11.1,11.2,12.1,12.2,13.1,13.2). An independent claim is also included for a blank for making a folding box.

Description

The invention relates to a carton made of corrugated cardboard for receiving a filled with a liquid and having a tap bag. Furthermore, the invention relates to a blank for producing such a carton.

Folding boxes of the aforementioned type are used in particular for the transport, storage and dispensing of beverages, such as wine or fruit juices or fruit juice concentrates. But they can also be used as a donor for other liquids, such as edible oil, detergent or motor oil.

Conventional cartons of the aforementioned type are cuboid and usually made of corrugated cardboard. In the carton a plastic bag is used, which is provided with a tap. The tap is completely arranged in this before the folding box. The carton has in its wall an annular punch perforation and adjacent thereto a tab-shaped punch perforation. By breaking the perforations, a circular disk-shaped part of the wall can be cut out and a tab bent out. Then the tap can be pulled out and inserted into the circular hole. By pivoting back the tab to its original position, the tap can be secured in the hole. By pressing the tap liquid is removed from the bag.

The bag may contain one or more liters of liquid. For example, folding cartons containing a bag of three liters of wine are known. So that the carton does not bulge and stacked on top of each other is not damaged, correspondingly strong corrugated cardboard is used. Because the cartons cuboid, it may be difficult to remove individual cartons from a row. At the corners is located in the cartons a cavity that is not filled by the filled bag. As a result, the corners can be easily damaged or dented.

Based on this, the present invention seeks to provide a carton with the least possible use of materials, which is stable and has more favorable handling properties.

Furthermore, a blank for such a carton to be created.

The object is achieved by a folding box with the features of claim 1. Advantageous embodiments of the carton are given in the dependent claims.

• Seitenwände, wobei eine Seitenwand zwei einander überlappende und miteinander verbundene Seitenwandabschnitte aufweist,
• bogenförmig gekrümmte Verbindungsstreifen, die an ihren Längsseiten über Seitenwand-Faltlinien mit den Längsseiten zweier benachbarter Seitenwände verbunden sind, wobei die Seitenwand-Faltlinien parallel zur Welle der Wellpappe ausgerichtet sind,
• Stirnwände, die stirnseitige Öffnungen zwischen den Seitenwänden überdecken und jeweils mit einer Querseite mindestens einer Seitenwand über eine Stirnwand-Faltlinie verbunden sind und
• einen von mindestens einer Schwächungslinie umgrenzten, öffnenbaren Bereich in mindestens einer Seiten- und/oder Stirnwand zum Herausziehen des Zapfhahns.

The carton according to the invention of corrugated cardboard for receiving a filled with a liquid and having a tap bag having

• Sidewalls, wherein one sidewall has two overlapping and interconnected sidewall portions,
• arcuately curved connecting strips which are connected at their longitudinal sides by sidewall folding lines with the longitudinal sides of two adjacent side walls, wherein the side wall fold lines are aligned parallel to the corrugated cardboard shaft,
• End walls which cover end openings between the side walls and are each connected to a transverse side of at least one side wall via a front wall fold line and
• one of at least one line of weakness bounded, openable area in at least one side and / or end wall for pulling out the tap.

In the folding box according to the invention, the side walls are connected to each other via arcuately curved connecting strips. The connecting strips are hinged to the side walls by means of sidewall fold lines. The sidewall fold lines are aligned parallel to the shaft of the corrugated board. The sidewall fold lines define the ends of the curved connector strips. When erecting the carton, the connecting strips are arcuately curved starting from the side wall fold lines. Aligning the sidewall fold lines parallel to the shaft of the corrugated board facilitates curving of the connecting strips between the sidewalls and limits them to the area between the sidewalls. For this purpose, when erecting a blank is preferably placed around a corresponding shape, which rests with flat surfaces on the inner sides of the side walls and with corresponding arcuately curved surfaces on the inner sides of the connecting strip. When folding the blank around the core, two side wall portions of a side wall are brought into overlapping relationship and bonded together, preferably glued. Preferably, when erecting the carton an end wall is closed and fixed in the closed position, for. B. by gluing two end wall flaps or by connecting an end flap of a front wall flap with a side wall. As a result, the carton is stabilized in shape. Thereafter, the partially erected carton is removed from the core. In this erected position, the bag is inserted through the still open frontal opening, so that the tap is arranged on the inside of the openable area. After that, the other one becomes End wall closed according to the first end wall. This process can be performed fully automatically by a packaging machine.

According to a preferred embodiment, the carton has four side walls and four connecting strips. Two side walls are arranged parallel to each other opposite each other. At the "corners" the adjacent side walls are connected by the arcuately curved connecting strips.

The carton is due to the orientation of the corrugated cardboard wave parallel to the side wall fold lines and thus perpendicular to the end walls particularly stable. A variety of cartons end wall is stackable on end wall, without the bottom cartons are damaged by the load arranged above. The carton is advantageously produced from corrugated cardboard with a low material thickness. Thus, for example, a carton for three-liter bag of E-wave or ultra-fine wave (wave pitch 3 to 3.5 mm, wave height 1 to 1.8 mm) or so-called "microwave" produced. Furthermore, the rounded "corners" formed by the arcuately curved connecting strips have the advantage that the filled bag can fit snugly against the inner sides of the connecting strips, so that there is support for the connecting strips from the inside, which is an impression of the corners during transport or due to other reasons Force prevents. The rounded "corners" also saves material, as the carton nestles closer to the bag. Another advantage is that a single carton is easier to extract from a row or stack than a cuboid carton because of the arcuately curved tie strips because the user can grasp a single carton on the curved tie strip and pull it out of the row. Another advantage of handling is that in the arcuately curved connecting strip, the shaft on the outside line-shaped, so that the outside of the carton is easier to grip and the carton can be worn safely. A print on the outside of the carton may be continuously extended over the arcuate connecting strips over a plurality of side walls.

According to one embodiment, the connecting strips have a plurality of parallel creasing lines extending in the longitudinal direction of the shaft. The creasing lines form a plurality of joints for bending the connecting strips in an arched shape. The parallel creasing lines in the connecting strips facilitate the bending of the connecting strips in a defined arc shape when erecting the carton.

According to another embodiment, adjacent score lines at the connection strips are at a constant distance from one another to support a uniform curvature of the connection strips.

According to one embodiment, the side wall fold lines and / or the end wall fold lines are formed by further score lines. The end wall scoring lines are transverse to the shaft. As a result, end walls can be folded perpendicular to the side walls in the frontal openings.

According to one embodiment, the score lines and / or the further score lines are arranged on the inside of the corrugated cardboard. Facilitated by the arcuate curvature of the connecting strip.

According to one embodiment, the end walls in each case comprise two end wall flaps, which are hinged to mutually opposite side walls and the congruent over the upper edges of the arcuately curved Connecting strips have running radii on the sides. The end wall flaps are supported on the radii on the upper edges of the arcuately curved connecting strips without protruding outwardly beyond them. As a result, forces acting on the end wall are introduced into the connection strips. Preferably, the end wall flaps are additionally supported on the upper edges of the side walls, which are connected via connecting strips with the side wall, to which the respective end wall flap is articulated. As a result, the stability and stackability of the carton is further promoted.

According to a further embodiment, the end wall flaps touch each other at their inner edges. As a result, the end wall flaps are supported against each other, whereby a deformation of the carton is hindered by directed perpendicular to the side walls forces to which the end wall flaps are hinged.

According to a further embodiment, the end walls on at opposite side walls hinged dust flaps, which are arranged under the end wall flaps. The dust flaps prevent the entry of dirt into the packaging and contribute to the stabilization of the end walls. Preferably, the end wall flaps are connected to the dust flaps, preferably by gluing to close the end walls.

According to a further embodiment, the dust flaps touch each other at their inner edges. Thus, the dust flaps are also supported against each other, so that they support forces that are directed perpendicular to the side walls to which the dust flaps are hinged. As a result, the stability of the carton is further increased.

According to a further embodiment, the dust flaps have adjacent to the end wall fold lines radii which extend congruently over the upper edges of the adjacent arcuate curved connecting straps. Thus, the dust flaps are supported at the upper edges of the connecting tabs without protruding outwardly beyond them. As a result, the stability of the package is further increased with respect to a load acting on the end walls. The stackability is thereby further improved.

According to one embodiment, each dust flap has at its inner ends a support region with a width which corresponds to the distance between the inside of opposite side walls, which are connected via the arcuately curved connecting straps to the side wall, to which the dust flap is articulated. The support area supports the opposing side walls, against the inner sides of the support area. As a result, forces are absorbed, which act perpendicular to the opposite side walls and further increases the stability of the package.

According to one embodiment, the dust flaps between the radii and the support areas on a waist. The waist favors the production of a carton with radii on the end wall flaps and on the dust flaps of a one-piece blank foldable flat material. The radii on the end wall flaps and the adjacent edges of the end wall flaps, which rest on the connecting strip and the adjacent side walls, can be formed by punching out of the region of the waist of the dust flaps.

According to a preferred embodiment, the carton is made of a one-piece blank of corrugated cardboard.

According to a further embodiment, the corrugated board is painted on the outside. According to a further embodiment, the outside has an imprint.

According to a further embodiment, the carton contains a bag filled with liquid and having a tap.

• Seitenwänden, wobei eine Seitenwand zwei Seitenwandabschnitte aufweist, die in einander überlappender Beziehung miteinander verbindbar sind,
• Verbindungsstreifen, die an ihren Längsseiten über Seitenwand-Faltlinien mit den Längsseiten zweier benachbarter Seitenwände verbunden sind, wobei die Seitenwand-Faltlinien parallel zur Welle der Wellpappe ausgerichtet sind,
• Stirnwänden, die jeweils mit einer Querseite mindestens einer Seitenwand über eine Stirnwand-Faltlinie verbunden sind und
• einem von mindestens einer Schwächungslinie umgrenzten, öffenbaren Bereich in mindestens einer Seiten- und/oder Stirnwand zum Herausziehen des Zapfhahns.

Furthermore, the object is achieved by a blank of corrugated cardboard for a carton for receiving a filled with a liquid and having a tap bag with

• Side walls, one side wall having two side wall portions connectable in overlapping relationship with each other,
• Connecting strips connected at their longitudinal sides by sidewall fold lines to the longitudinal sides of two adjacent sidewalls, the sidewall fold lines being aligned parallel to the corrugated cardboard shaft,
• End walls, which are each connected to a transverse side of at least one side wall via a front wall fold line and
• one of at least one line of weakness bounded, openable area in at least one side and / or end wall for pulling out the tap.

According to one embodiment, the connecting strips have a plurality of parallel, in the longitudinal direction of the shaft extending score lines.

According to a further embodiment, adjacent creasing lines in the connecting strip at a constant distance from each other.

According to a further embodiment, the side wall fold lines and / or the end wall fold lines are formed by further score lines.

According to a further embodiment, the score lines and / or the further score lines are arranged on the inside of the corrugated cardboard.

According to a further embodiment, the corrugated cardboard is painted on the outside. This favors the printing of the blank.

According to a further embodiment, the transverse sides of two side walls, which are arranged one above the other in the erected folding box, are hinged via end wall fold lines to end wall flaps. According to one embodiment, the length of the end wall flaps corresponds to half the distance of the opposing side walls in the erected folding box, to which the end wall flaps are articulated.

According to one embodiment, dust flaps are articulated to the transverse sides of two further side walls via end wall fold lines.

According to a further embodiment, the length of the dust flaps corresponds to half the distance of the side walls in the erected folding box, to which the dust flaps are articulated.

According to one embodiment, the dust flaps have radii adjacent to the end wall fold lines.

According to a further embodiment, the dust flaps at the ends remote from their articulation on the end wall folding lines with a support area a width corresponding to the distance between two opposing side walls, which are connected via connecting strips with the side wall, to which the dust flaps are hinged, corresponds in the erected carton.

According to a further embodiment, the dust flaps between the radii and the support region on a waist.

According to a further embodiment, the blank is in one piece.

The invention will be explained in more detail with reference to the accompanying drawings of an embodiment.

Fig. 1

einen Zuschnitt der erfindungsgemäßen Faltschachtel flach ausgebreitet in der Draufsicht;

Fig. 2

eine aus dem Zuschnitt gemäß Fig. 1 gebildete Faltschachtel in einer Perspektivansicht;

Fig. 3

dieselbe Faltschachtel in Vorderansicht.

In the drawings show:

Fig. 1

a blank of the carton according to the invention spread flat in plan view;

Fig. 2

one from the blank according to Fig. 1 formed carton in a perspective view;

Fig. 3

the same carton in front view.

Fig. 1 shows a blank 1 with four side walls 2 to 5, wherein the side wall 2 has two side wall sections 2.1, 2.2. having. The side walls 2 to 5 are rectangular. The side walls 2 and 4 are narrow and the side walls 3 and 5 are formed wide.

Between the side walls 2 to 5 rectangular connecting strips 6 to 9 are arranged. The connecting strips 6 to 9 are connected on both sides via side wall folding lines 10.1, 10.2, 11.1, 11.2, 12.1, 12.2 and 13.1, 13.2 to the adjacent side walls 2 to 5. The connecting strips 6 to 9 are the same width.

The connecting strips 6 to 9 each have a plurality of parallel score lines 14, 15, 16, 17, which run parallel to the side wall fold lines 10.1 to 13.2 and have a constant distance from each other.

To the transverse sides of the side walls 2 to 5 end walls 18, 19 are articulated. These include end wall flaps 20.1, 20.2, which are hinged to the side wall 3 via end wall fold lines 21.1, 21.2. Further, they include end wall flaps 22.1, 22.2, which are hinged on end wall folding lines 23.1, 23.2 to the side wall 5. Furthermore, they include dust flaps 24.1, 24.2, which are hinged to the side wall 4 via end wall fold lines 25.1, 25.2. Finally, dust flaps 26.1, 26.2 are hinged to the side wall 2 via end wall fold lines 27.1, 27.2.

The end wall flaps 20.1, 20.2, 22.1, 22.2 have adjacent to the end wall fold lines 21.1, 21.2, 23.1, 23.2, via which they are hinged to the respective side wall 3, 5, respectively on both sides radii 28, 29. These run respectively in parallel outer edges 30, 31 from. Furthermore, they have a parallel to the end wall fold lines edge 32, 33rd

The dust flaps 24.1, 24.2, 26.1, 26.2 each have adjacent to the end wall fold lines 25.1, 25.2, 27.1, 27.2, via which they are connected to the side walls 4, 2, further radii 34, 35. Adjacent thereto, they have a waist 36th , 37 on, from this range the radii and lateral edges of the end wall flaps 20.1, 20.2, 22.1, 22.2 are punched out. Furthermore, the dust flaps 24.1, 24.2, 26.1, 26.2 at the ends remote from the end wall fold lines 25.1, 25.2, 27.1, 27.2 have a widened support region 38, 39 which is parallel to one of the end wall fold lines 25.1, 25.2, 27.1, 27.2 Edge 40, 41 is limited.

In the side wall 5, an openable area 42 is present, which is bounded by lines of weakness 43. The weakening line 43.1 is circular. Two further lines of weakness 43.2, 43.3 are inclined obliquely to the weakening line 43.1, starting from opposite points of the weakening line 43.1.

The further weakening lines are followed by further weakening lines 43.4, 43.5, which run parallel to the side wall fold lines 12.2, 13.1 at a distance from each other.

The ends of the still further weakening lines 43.4, 43.5 are connected to each other by an opening fold line 44.

The blank 1 is made in one piece from corrugated cardboard. For example, an E-wave is used. The wave of the corrugated board (i.e., wave strength and wavelength) is parallel to the sidewall fold lines and score lines 14, 15, 16, 17 within the tie strips 6, 7, 8, 9.

The blank 1 is painted on the outside and the score lines 10 to 13, 14 to 17, 21, 23, 25, 27 are inserted into the inside of the blank 1. The weakening lines 43 are formed as interrupted punched lines, which are also introduced from the inside of the corrugated cardboard in the blank 1.

The blank 1 is erected into a folding box 45 in which the side walls 2 to 5 are beaten around a core and the side wall sections 2.1, 2.2. are glued together in overlapping relationship with each other. In this case, the less wide side wall section 2.1 is arranged below the wider side wall section 2.2.

The connecting strips 6 to 9 are arcuately curved, wherein the side wall fold lines 10 to 13 and the score lines 14 to 17 act as joints that support the uniform curvature.

Furthermore, an end wall 18 is still closed on the core by first struck the dust flaps 24.1, 26.1 in the end wall opening and above the end wall flaps 20.1, 22.1 folded and bonded to the dust flaps 24.1, 26.1. As a result, the carton 45 is stabilized in its erected form and can be removed from the core.

Then, a bag filled with liquid is inserted through the still open end opening, so that a tap connected to the bag is arranged on the inside of the openable area 42. Finally, the further end wall 19 is closed by closing and gluing the dust flaps 24.2, 26.2 and end wall tabs 20.2, 22.2 with each other.

The dust flaps 24.1, 24.2, 26.1, 26.2 bear against the support areas 38, 39 on the inner sides of the side walls 2, 5 and abut with their inner edges 40, 41 against each other.

The dust flaps 20.1, 20.2, 22.1, 22.2 also abut each other with their inner edges 32, 41 together. The radii 28, 29, 34, 35 are located just above the upper edges of the arcuately curved connecting strips 6, 9.

In this erected and closed arrangement, the carton 45 is in Fig. 2 and 3 shown.

These figures show that the end wall flaps 20.1, 20.2, 22.1, 22.1 and the underlying dust flaps 24.1, 24.2, 26.1, 26.2 do not protrude beyond the upper edges of the side walls 2 to 5 and connecting strips 6 to 9 and rest thereon.

The folding box 45 is very stable and easy to handle. Due to the curves at the "corners" it can be easily grasped or pulled out of a series of juxtaposed folding boxes 45.

To remove liquid from the folding box 45, the lines of weakness 43 can be known to be separated. After pulling out the tap and anchoring in the hole defined by the weakening line 43.1 by means of the limited by the lines of weakness 43.2, 43.3, 43.4, 43.5 tab liquid can be removed from the bag.

Claims (15)

Corrugated cardboard carton for holding a bag filled with a liquid and having a tap Side walls (2, 5), one side wall (2) having two overlapping and interconnected side wall sections (2.1, 2.2), - Arcuately curved connecting strips (6 to 9), which are connected at their longitudinal sides by sidewall fold lines (10 to 13) with the longitudinal sides of two adjacent side walls (2 to 5), wherein the side wall fold lines (10 to 13) parallel to the shaft the corrugated board are aligned, - End walls, (18, 19) cover the end-side openings between the side walls (2, 5) and are each connected to a transverse side of at least one side wall via an end wall fold line (21, 23, 25, 27) and - One of at least one weakening line (43) bounded, openable area (42) in at least one side and / or end wall (2 to 5, 18, 19) for pulling out the tap. Folding box according to claim 1, in which the connecting strips (6 to 9) have a plurality of parallel creasing lines (14 to 17) extending in the longitudinal direction of the shaft and / or at the adjacent creasing lines (14 to 17) in the connecting strips (6 to 9) have constant distance from each other and / or in which the side wall fold lines (10 to 13) and / or the end wall fold lines (21, 23, 25, 27) are formed by further creasing lines and / or in which the score lines (10 to 17 ) and / or the further creasing lines (21, 23, 25, 27) are arranged on the inside of the corrugated cardboard. Folding box according to one of claims 1 to 2, wherein the end walls (18, 19) each comprise two end wall flaps (20, 22) which are articulated to mutually opposite side walls (3, 5) and the congruent over the upper edges of the arcuately curved Connecting strips (6 to 9) extending radii (28, 29) have on the sides. Folded carton according to one of claims 1 to 3, wherein the end walls (18, 19) on at opposite side walls hinged dust flaps (24, 26), which are arranged under the end wall flaps (20, 22). Folding box according to one of claims 1 to 4, wherein the end wall flaps (20, 22) touch each other at their inner edges (32, 33) and / or in which the dust flaps (24, 26) at their inner edges (40, 41 ). A carton as claimed in any one of claims 1 to 5, wherein the dust flaps (24,26) have radii (34,35) adjacent the end wall fold lines which are congruent over the upper edges of the adjacent arcuate connecting strips (6-9). Folding box according to one of claims 1 to 7, in which each dust flap (24, 26) has at its inner ends a support area (38, 39) with a width corresponding to the spacing of the inner sides of mutually opposite side walls (3, 5) the arcuately curved connecting strips (6, 9) are connected to the side wall (4, 2), to which the dust flap (24, 26) is articulated. Folding box according to claim 7, in which the dust flaps (24, 26) between the radii (34, 36) and the support region (38, 39) have a waist (36, 37) and / or at which the radii (28, 29) and lateral edges of the end wall flaps (20, 22) are punched out of the region of the waist (36, 37). Folding box according to one of claims 1 to 8, which is made of a one-piece blank (1) made of corrugated cardboard. Folding box according to one of claims 1 to 9 comprising a bag filled with a liquid and having a tap. Corrugated board blank for folding carton for receiving a bag filled with a liquid and having a tap Side walls (3 to 5), one side wall (2) having two side wall sections (2.1, 2.2) connectable in overlapping relationship with each other, - Connecting strips (6 to 9), which are connected at their longitudinal sides by sidewall fold lines (10 to 13) with the longitudinal sides of two adjacent side walls (3 to 5), wherein the side wall fold lines (10 to 13) parallel to the shaft of the corrugated cardboard are aligned, - End walls (18, 19), each with a transverse side of at least one side wall (3, 5) via an end wall fold line (21, 23, 25, 27) are connected and - One of at least one weakening line (43) bounded, openable area (42) in at least one side and / or end wall (2 to 5, 18, 19) for pulling out the tap. Blank according to claim 11, in which the connecting strips (6 to 9) have a plurality of parallel creasing lines (14 to 17) extending in the longitudinal direction of the shaft and / or at the adjacent creasing lines (14 to 17) in the connecting strips (6 to 9) have constant distance from each other and / or in which the side wall fold lines (10 to 13) and / or the end wall fold lines (21, 23, 25, 27) are formed by further creasing lines and / or in which the score lines (10 to 13 ) and / or the further creasing lines (21, 23, 25, 27) are arranged on the inside of the corrugated cardboard. Blank according to one of Claims 11 to 12, in which end wall flaps (20, 22) are connected to the transverse sides of two side walls (3, 5) which are arranged opposite one another in the erected folding box (45) via end wall fold lines (21, 22). are articulated, whose length corresponds to the distance of the opposing side walls (3, 5) in the erected carton (45) and / or at the on the transverse sides of two further side walls (4, 2) via end wall fold lines (23, 27) dust flaps (24, 26) are articulated and / or in which the length of the dust flaps (24, 26) each equal to half the distance of the side walls (2, 4), to which they are hinged, and / or in which the dust flaps (24 , 26) have radii (34, 35) adjacent to the end wall fold lines (25, 27). A blank according to any one of claims 11 to 13, wherein the dust flaps (24, 26) have at the ends remote from their hinging at the end wall fold lines (25, 27) a support region (38, 39) having a width equal to the distance two opposing side walls (3, 5) in the erected folding box (45) and / or in which the dust flaps (24, 26) between the radii (34, 35) and the support region (38, 39) has a waist (36, 37). Blank according to one of claims 15 to 25, which is in one piece and / or in which the corrugated cardboard is painted on the outside.

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