EP0431317A1 - Package for flowable material having a continuous peripheral seam - Google Patents

Abstract

A package for liquids is described which has tubular side walls (2, 3), an essentially flat bottom and flat top wall (9) and a closable pouring device (10) situated within the outer contour of the bottom and the top wall (9), all the parts of the package consisting of plastic. In order to provide a package which can be produced inexpensively as a mass product, is satisfactorily liquid-tight, easy to open, readily stackable and environmentally friendly, provision was made according to the invention for a seam (12) projecting from the side walls (2, 3) of the package to pass around the package in a plane parallel to the longitudinal mid-axis of the tube (1), for the seam (12) to be arranged extending in a depression (11) in the region of the bottom and the top wall (9), and for part of the depression (11) in the top wall (9) to surround the pouring device (10). <IMAGE>

Description

The invention relates to a pack for flowable filling material with tubular side walls, essentially flat bottom and essentially flat top wall and with a closable pouring device located within the outer contour of the bottom and top wall, all parts of the pack being made of plastic.

Numerous types of packs are known for liquids, but most of them have at least the tubular side walls made of plastic-coated paper.

Efforts are being made to manufacture containers from one and the same material rather than from composite materials because the reprocessing possibilities are better and such packages are considered to be more environmentally friendly. Known plastic plastic packs without paper have so far only been able to be produced in small numbers and with complex machines, with the result that such packs become expensive and complex for the end user.

The object of the present invention is to produce an inexpensive mass-produced pack for flowable filling goods which is perfectly liquid-tight, easy to open, easy to stack and also environmentally friendly.

According to the invention, this object is achieved in that a seam protruding from the side walls of the pack moves the pack lying in a plane which is arranged parallel to the longitudinal central axis of the tube, that the seam is arranged in a depression in the region of the bottom and the top wall and that part of the recess in the top wall surrounds the pouring device. The new pack is made entirely of plastic without a paper substrate and has an approximately flat bottom and also an approximately flat top wall. The seam stiffens the pack and preferably protrudes approximately vertically from the surface of the wall in question, without interfering with the stackability, because in the area of the bottom on the one hand and the top wall on the other hand the seam runs in a groove-like depression. Thanks to the new structure with tube and seam, the pack is perfectly liquid-tight and can be mass-produced.

The plastic material allows environmentally friendly waste disposal after using and emptying the package according to the invention.

The tube representing the side walls can be round or oval in cross section, but the packing is preferably cuboid.

It is also expedient according to the invention if the side walls form a tube with a square cross section, which preferably has rounded edges, and if the seam runs along the diagonals of the top wall and is interrupted by the pouring device. The pouring device is also located in a recess in the top wall, namely in the vicinity of the outer edge of the top wall. In the case of a square tube, the cross section of which is, for example, a square or a rectangle, the seam runs diagonally through this packing in such a way that the top wall is preferably divided into two halves, and the seam also runs transversely through the pouring device. The most important thing about a pouring device after opening is the pouring opening, and therefore the package is designed so that the seam does not go across the pouring opening but only runs outside the pouring opening on the top wall, i.e. is interrupted in the area of the pouring opening. Preferably, the seam is formed at a small distance of, for example, 1 mm to 7 mm and preferably 2 to 6 mm from the respective outer edge of the pouring opening to the outside with a lower height, for example by 1% to 30%, preferably 10% to 20% of the The height of the remaining seam is shortened or compressed, so that the manufacturer has enough space to take suitable measures for a practical pouring device. In the following, an opening piece is described which is sealed to the top wall to form the pouring device, and for this the seam in the area of the pouring device is interrupted. The pouring device has a hole around the top wall Edge which, where the seam is interrupted - that is, not there - stiffens the pack. The seam practically starts at this edge of the hole in the top wall, preferably on both sides of the hole in the top wall, so that the top wall also has excellent rigidity in the region of the pouring device.

Despite the square cross-section of the packing tube, its edges can be regarded as rounded, so that the packing gains an attractive appearance and does not disturb the seam for space-saving transport and better stacking of the filled packing in collecting containers, which runs parallel to the longitudinal axis of the tube on two opposite side walls . If the seam is only as high as the roundness of the tube edge on the side walls, then the seam is picked up on two opposite edges of the side wall tube in this space which has been freed up by the rounding. If such a square tube were to have geometrically large levels in the outer surface of the four side walls, then the seam would not protrude beyond the space spanned by these four levels. However, this allows perfectly stackable and space-saving arrangements of the packs according to the invention.

It is expedient according to the invention if the parts of the pack consist of deformable plastic, preferably a thermoplastic, and the seam surrounding the pack is formed from two webs welded together. Cold-deformable and hot-deformable plastic materials are known, all of which are suitable for producing the package according to the invention. However, the plastic material of the package should preferably be thermoformable, in particular a thermoplastic, such as polypropene. PVC and polypropene, for example, can also serve as the thermoplastic is widely known in the art as polypropylene. The package according to the invention then consists of perfectly reprocessable parts and materials (in contrast to composite materials). In a particularly preferred embodiment, the plastic material, for example the polypropene, can also be filled, the fillers here being chalk, mica, talc, plaster or the like. In practice, filling levels of around 60% have proven to be favorable. It has been shown that such filled plastic materials are deep-drawable and also sealable.

If the seam consists of two webs welded to one another, then the pack according to the invention can also be formed from two cup-shaped fractions, both of which are welded to form a unit along the webs lying one on top of the other.

It is also advantageous according to the invention if at least two side walls each have a recess as a recessed grip. Such a trough can be produced relatively easily with a thermoplastic, either by cold working or by the usual deep-drawing process. The recessed grips replace a handle attached to the outside of the pack. As a result, the outer contour of the pack can be made stack-friendly. In addition, the trough can be shaped such that the volume of the container itself is not significantly impaired or reduced. If the recessed grips are intended for a pack with a cuboid tube, it is best to arrange them on both sides of a longitudinal edge between two side walls, which is parallel to the longitudinal center line of the pack and runs through the plane with the seam. Towards the "back", the recessed grips then end in a soft, tapering manner in the described longitudinal edge and are located approximately in the upper half of a pack; for packs with a smaller volume of, for example, 1/2 liter or 1/4 liter approximately in the middle of the side wall with respect to them Height. Towards the "front", where the pouring device is arranged, the respective recessed grip ends (of course at a considerable distance from the pouring device) approximately in the region of a longitudinal side edge of the tube, which could be called the "middle longitudinal side edge" because it is not the front longitudinal side edge which lies below the pouring edge next to the pouring device and is also not the rear longitudinal side edge which was described above. By two of these middle longitudinal side edges one could imagine a plane again, and then this plane would be perpendicular to the plane mentioned above, which runs through the seam.

The invention is also advantageously designed in such a way that the pouring device has a separate opening piece made of deformable plastic which is inserted into a hole in the upper wall and welded in the upper wall. The manufacture of such a pack is then particularly simple, since the tube with the bottom and top wall made of the deformable plastic then only needs to be formed with a hole in the top wall, into which a correspondingly designed opening piece is welded as a pouring device. This opening piece can be prefabricated separately and inserted into the hole in the top wall of the pack with high output (number of pieces per unit of time) and welded there. It is particularly advantageous if the opening piece of the pouring device has a lower part and a closure part connected to it by a hinge. Such a configuration simplifies the opening piece in a special way. Functional parts connected via a hinge can be easily manufactured and assembled. This is even possible with a wide variety of materials, plastic which is preferably deformable according to the invention as the material for the opening piece. The lower part is then welded into the hole in the top wall of the package in the manner described, and the closure part is connected on the one hand to the lower part via the hinge and on the other hand to the lower part via a weld line.

According to the invention, it is provided that the lower part is sealed to the closure part along a weld line which defines the pouring opening and that the opening piece has a cup-shaped depression which receives the pouring opening. By said welding line, the lower part is thus connected to the closure part in such a way that, when the pack is finished, filled and not yet opened, both parts of the opening piece, namely the lower part and the closure part, close the hole in the top wall of the pack like a piece and, if necessary, liquid-tight keep closed. Both the lower part and the closure part have the cup-shaped depression mentioned, so that in addition to the adhesive or sealing force between the hole edge in the upper wall of the pack and the lower part there is also a certain positive connection between the upper wall and the opening piece. If you now tear up the closure part to open it, the tearing force is introduced into the welding line so that the tear piece located within the welding line adheres to the closure part and is torn out of the lower part in such a way that - as determined by the course of the welding line - the Pour opening results. This creates a clearly defined opening that is easy to manufacture and can even be closed by the end user after the first opening.

It is also advantageous according to the invention if the opening piece is welded along the edge of the hole in the top wall. This is the measure already indicated above for the practical fastening of the prefabricated opening piece after it has been inserted into the hole in the top wall.

In a further advantageous embodiment of the invention, this Closure part on a plate covering the casting surface of the lower part with gripping tip. In other words, the opening piece is designed such that its lower part has a pouring surface which surrounds the pouring opening and which advantageously functions as a pouring edge at the foremost tip or edge. This pouring surface, which is generally flat, should - not least also for hygienic reasons - be covered after reclosing until the second or third pouring process. This cover is provided by the plate of the closure part, which, like the casting surface, engages around the cup-shaped depression of the opening piece. The plate has a tip in the direction of the pouring jet, that is to say toward the front longitudinal side edge of the pack, which the end user can use to grip the closure part and tear it up. This tip can also be understood as a gripping aid.

If, in a preferred embodiment, pasteous filling goods are to be stored, transported and then poured out again, e.g. and in particular yogurt, then it is expedient if, according to the invention, the pouring opening takes up most of the top wall. A smaller opening piece with a pouring opening of smaller area is sufficient for filling goods with a lower viscosity. In the case of yogurt or other paste-like filling goods, on the other hand, the pouring opening should be larger, preferably also take up the main part of the top wall.

Figur 1

perspektivisch die geschlossene Packung, wobei der Betrachter auf die mittlere Längsseitenkante blickt, die hintere Längsseitenkante rechts und die vordere Längsseitenkante links sieht,

Figur 2

ebenfalls perspektivisch die Packung, jedoch nach dem Öffnen der Ausgießeinrichtung, die in der Oberwand der Packung vorn angeordnet ist, vorzugsweise als Packung mit einem Volumen von 2 Liter,

Figur 3

die Draufsicht auf die geschlossene Packung gemäß Figur 1,

Figur 4

die Seitenansicht der Packung nach dem Öffnen im Zustand der Figur 2,

Figur 5

eine Rückansicht der geschlossenen Packung, wenn man in Figur 1 von der hinteren Längsseitenkante nach vorn in Richtung Ausgießeinrichtung blickt,

Figur 6

eine Draufsicht auf die Packung ohne Öffnungsstück, wobei der Betrachter im vorderen Bereich der Oberwand, auf welche er blickt, nur das Loch innerhalb der Vertiefung sieht,

Figur 7

eine Querschnittsansicht entlang der Linie VII-VII der Figur 6,

Figur 8

eine abgebrochene Querschnittsansicht entlang der Linie VIII-VIII der Figur 6, allerdings nur vom oberen Teil der Packung, wie dies auch in Figur 7 gezeigt ist,

Figur 9

eine Ansicht entlang der Linie IX-IX der Figur 3,

Figur 10

eine Einzelansicht gemäß dem strichpunktierten Kreis in Figur 9,

Figur 11

eine ähnliche vergrößerte Einzelansicht wie in Figur 10, jedoch nach dem Aufreißen des Verschlußteiles,

Figur 12

eine schematische Seitenansicht des geöffneten Öffnungsstückes, wobei das Verschlußteil um das Scharnier um 90° herumgeschwenkt ist und vertikal aus der Oberwand der Packung heraussteht, wenn das Unterteil als horizontal in der Packungsoberwand liegend angenommen wird,

Figur 13

perspektivisch eine andere Ausführungsform von Packung in geöffnetem Zustand, vergleichbar mit dem Zustand der Figur 2, wobei jedoch die Ausgießöffnung den größten Teil der Oberwand einnimmt,

Figur 14

eine Seitenansicht der geschlossenen Packung der Ausführungsform gemäß Figur 13, und zwar wenn man auf die vordere linke Seitenwand der Packung blickt, so daß die rechte, hintere Längsseitenkante für den Betrachter unsichtbar wird,

Figur 15

eine Draufsicht auf die geschlossene Packung gemäß Figur 14,

Figur 16

eine Rückansicht auf die geschlossene Packung, wenn man auf die hintere Längsseitenkante nach vorn in Richtung Gießkante blickt,

Figur 17

eine Seitenansicht auf die geöffnete Packung der Ausführungsform der Figur 13, wenn man auf die mittlere Längsseitenkante blickt und die Gießkante links angeordnet ist und

Figur 18

eine Draufsicht auf das Öffnungsstück bei der Ausführungsform nach Figur 13.

Further advantages, features and possible uses of the present invention result from the following description of preferred exemplary embodiments in conjunction with the drawings. Show it:

Figure 1

perspectively the closed package, with the viewer looking at the central long edge, the rear long edge on the right and the front Long edge on the left,

Figure 2

likewise the pack in perspective, but after opening the pouring device, which is arranged in the top wall of the pack, preferably as a pack with a volume of 2 liters,

Figure 3

the top view of the closed package according to Figure 1,

Figure 4

the side view of the package after opening in the state of Figure 2,

Figure 5

2 shows a rear view of the closed package when looking in FIG. 1 from the rear longitudinal side edge towards the pouring device,

Figure 6

3 shows a plan view of the package without an opening piece, the viewer in the front region of the top wall, which he is looking at, only seeing the hole within the depression,

Figure 7

6 shows a cross-sectional view along the line VII-VII in FIG. 6,

Figure 8

6 shows a broken cross-sectional view along the line VIII-VIII of FIG. 6, but only from the upper part of the pack, as is also shown in FIG. 7,

Figure 9

3 shows a view along the line IX-IX of FIG. 3,

Figure 10

4 shows a single view according to the dash-dotted circle in FIG. 9,

Figure 11

10 shows a similar enlarged individual view as in FIG. 10, but after the closure part has been torn open,

Figure 12

2 shows a schematic side view of the opened opening piece, the closure part being pivoted around the hinge by 90 ° and protruding vertically from the top wall of the pack if the bottom part is assumed to be horizontal in the top wall of the pack,

Figure 13

perspective another embodiment of the package in the open state, comparable to the state of Figure 2, but the pouring opening takes up most of the top wall,

Figure 14

13 shows a side view of the closed package of the embodiment according to FIG. 13, specifically when one looks at the front left side wall of the package, so that the right, rear longitudinal side edge becomes invisible to the viewer,

Figure 15

14 shows a top view of the closed package according to FIG. 14,

Figure 16

a rear view of the closed package when looking at the rear longitudinal side edge towards the pouring edge,

Figure 17

a side view of the opened package of the embodiment of Figure 13, if you look at the middle longitudinal side edge and the pouring edge is arranged on the left and

Figure 18

a plan view of the opening piece in the embodiment of Figure 13.

The package used in the preferred embodiments described here is intended according to FIGS. 1 to 12 for milk, juices or the like, the package according to FIGS. 13 to 18 for yogurt, for example.

The respective package consists of a tube 1 with a square cross section and four side walls 2, 3, 4, because the fourth side wall is not shown in any drawing. But you can imagine the side wall 3 diametrically opposite. The four side walls 2 to 4 are separated from one another by longitudinal side edges, all of which lie parallel to the longitudinal center line 5 of the pack. These are the front longitudinal side edge 6, the rear longitudinal side edge 7 and the two central longitudinal side edges 8, which are diametrically opposite one another between the front 6 and the rear longitudinal side edge 7 opposite. 4, 13, 17, the middle longitudinal side edges are indicated by a line, but in reality all the longitudinal side edges are rounded, which is why no sharp line 8 can be seen, particularly in the perspective representations. However, the reader readily understands that four flat side walls 2 to 4 are surrounded by four - preferably rounded - edges 6-8 or are separated from one another by them. The tube is delimited on its underside by a floor (not specified in more detail) and on its top by the top wall 9, the bottom and top wall each lying in one plane.

In the first embodiment of the liquid pack, the level of the top wall 9 can be clearly seen because the pouring device, generally designated 10, occupies only a small part of the top wall 9, for example an area of 5 to 30%, preferably 10 to 20%. In the second embodiment according to FIGS. 13 to 18, however, the top wall 9 is practically only present as a ring next to the pouring device 10.

All parts 1 to 10 of the pack of both embodiments consist of thermoformed plastic. FIGS. 5 and 16 show the outer contour for the two exemplary embodiments, which is essentially cuboid with a flat top wall 9. So that no parts protrude from the outer contour and so that good stackability and repackaging is possible, groove-like depressions 11 are provided in both the bottom and the top wall 9, in which a seam 12 runs, which extends essentially perpendicularly from the plane of the top wall 9 or the floor protrudes. This seam 12 surrounds the entire cuboid or tube 1 of the pack, that is, it continues along the front 6 and rear longitudinal side edge 7 in such a way that the double-walled seam 12, as can be seen particularly clearly from FIG. 8 (two seam parts 12 'and 12 ") - a level can be placed, which exactly halves the cuboid of the pack in the embodiments shown here. In the perspective representation of FIGS. 1, 2 and 13, just as in the side view of FIGS. 4 and 17, one looks perpendicularly at this plane, in which the seam 12 is arranged like a frame, while in FIGS. 5 and 16 in the direction of this Level and thus also looks at the edge of the seam 12. Seen from the top wall 9, the seam 12 runs from one corner to the opposite along the diagonal - as is also the case with the bottom - in the case of the top wall 9, however, interrupted by the pouring device 10. Along the front and rear longitudinal side edges 6 and 7, the seam 12 can protrude vertically, without being folded over and tacked onto the outer surface, without protruding beyond the outer contour of the cuboid, because the longitudinal side edges 6 to 8 of the tube 1 are rounded, and in this space created by the rounding, the seam 12 runs through the rounding of the longitudinal side edges 6 to 8 on the one hand and through the groove-shaped depressions 11 in the bottom and in the upper wall of the pack, on the other hand, the seam 12 runs within the outer contour of the pack.

It can be seen particularly clearly from FIG. 6 that the seam 12 is interrupted by the hole 13 in the top wall 9. In other words, the seam 12 which runs in a straight line over the top wall 9 ends in front of the edge 14 of the hole 13, is omitted in the region of the hole because there is no material here, and continues again on the opposite side behind the hole 13. In areas next to the hole, which can be seen in FIGS. 7 and 9 and are designated by 15, the height of the seam 12 is reduced by 5 to 30%, preferably by 10 to 15%, of the total height of the seam 12. As a result, an opening piece 16 covering the hole 13 can be inserted, fastened and arranged so that the pouring device 10 having the opening piece 16 does not protrude beyond the outer contour of the package.

For this purpose, an enlarged part 17 of the otherwise groove-like recess 11 is provided in the upper wall 9, in which the pouring device 10 is located, this part 17 of the recess 11 being widened so that it surrounds the pouring device 10. In other words, the pouring device 10 is arranged with its opening piece 16 in such a way that it is recessed in this part 17 and also does not protrude beyond the outer surface of the upper wall 9.

FIGS. 1 and 2 clearly show a further recess 18 designed as a recessed grip. Such a recessed grip is also to be thought of in the second embodiment according to FIGS. 13 to 18, although it is not expressly shown there.

In the second embodiment, the seam 12 does not have to run through a recess in the region of the upper wall 9, because the interruption by the pouring device 10 takes up practically the entire upper wall 9. As a result, the surface of the wide depression 17 according to the first embodiment for the yoghurt mug according to the second embodiment of the upper wall 9 is to be assumed accordingly.

In the case of a pack with a volume of, for example, 2 liters, the recess 18 defining the recessed grip is arranged in the upper half of the respective rear side wall 3 or 4, as a result of which the end user supports the pack quite close to the center of gravity, so that the pouring out becomes very convenient and light.

The area surrounding the recess 18 (recessed grip) on the side wall 3 and also that on the adjacent side wall 4 connected therewith can be provided for printing.

The pouring device 10 is a separate opening piece 16 inserted into the hole 10 in the top wall 9 and welded along the edge 14 of the hole 13 in the top wall 9. In order to describe this in more detail, FIGS. 6 and 7 are best considered first. From these one can see the seam 12 interrupted by the hole 13 in the top wall 9, which (according to a particularly clear illustration in FIG. 8) consists of the two webs 12 ′, 12 ″ welded together and in the depression 11 or the widened depression 17 runs.

3, 9 and 12 are best considered to form the pouring device 10, as it is designed in principle in both of the embodiments shown here. The pouring device thus consists of the opening piece 16 welded into the hole 13 along its annular edge 14 9 clearly shows the ring-shaped welding region 19, illustrated by a thicker line, between the opening piece 16 and the hole 13. The part-cylinder-shaped ring 14, which is the edge of the hole 13, forms part of this welding surface 19, because the latter also sits on the top wall 9 and the recesses 15 on top of the seam 12 away.

This opening piece 16, which is welded into the hole 13 of the top wall 9 along the surface 19, in turn consists of a lower part 20 and a closure part 21 connected to it via a hinge 22. For a clearer representation of the hinge 22, it is best to take a look at FIG 13 also clearly shows the position of the hinge 22 in the second embodiment.

The opening piece 16, that is to say both the lower part 20 and the closure part 21, has a cup-shaped depression 23, as is clearly visible in the cross-sectional view of FIGS. 9 and 12 is. In the "bottom of this cup" runs a welding line 25 which defines the ultimately desired pouring opening 24.

If you look at the closed pouring device 10 according to FIG. 3, then you see there in dashed lines the welding line 25, which is actually equipped with a tip 26 towards the front tip of the pouring device 10, in order to concentrate the tear-off forces described below on a point on the welding line and thereby bring the initiation of the tear force into the right place. A part of the welding line 25 can be seen in cross-section through the individual view X in FIG. 9, which is more clearly shown in FIGS. 10 and 11. Before tearing, the welding line 25 surrounds the tear-out piece 27, which sticks to the closure part 21 after the tear-open and thereby defines the pouring opening 24 in the lower part 20.

A top view of the closed package according to FIGS. 3 and 15 shows in the region of the enlarged part 17 of the recess 11 in the top wall 9 from the pouring device, generally designated 10, to the outer surface of the closure part 21 with the cup-shaped recess 23, which is approximately circular configured cup-shaped recess 23 surrounding the closure part 21 is formed as a flat plate 28 which is provided at the front with a gripping tip 29. Figure 9 shows clearly for the first embodiment that this gripping tip 29 of the plate 28 protrudes over the so-called casting surface 30 with casting edge 31.

In operation, the end user will find the package shown in FIGS. 1 and 14 to 16 with the pouring device 10 closed. To open it, he grips the gripping tip 29 of the closure part 21 and pulls it up in the direction of the curved arrow 32 (FIGS. 10 and 12). Through the welding line 25 Traction is concentrated on the tip 26, which is why the welding line 25 also becomes the tear line that ultimately opens the pouring opening 24 after tearing. The tear along this welding line 25 takes place in the manner shown schematically in FIG. 4 in such a way that the tear-out piece 27 is torn from the lower part 20 and is torn up over the remaining part of the welding line 25 on the closure part 21. Here, the closure part folds according to the illustration in FIG. 12 when it moves in the direction of the curved arrow 32 around the hinge 22 into the upright position, for example. In this, the pouring opening 24 is exposed, because the tear-out piece 27 hangs on the closure part 21. The pouring process can begin. The state according to FIG. 2 or according to FIG. 13 is reached for both embodiments. When the package is tilted, the filling material flows over the pouring surface 30 and detaches along the pouring edge 31 in a clearly definable jet.

To reclose, the closure part 21 only needs to be folded down again in the direction opposite the curved arrow 32 (FIG. 12).

Claims (10)

Pack for flowable filling material with tubular side walls (2-4), essentially flat bottom and essentially flat top wall (9) and with a closable pouring device (10) located within the outer contour of bottom and top wall (9), all parts ( 1-10) of the pack consist of plastic, characterized in that a seam (12) protruding from the side walls (2-4) of the pack pulls the pack lying in a plane which is parallel to the longitudinal central axis (5) of the tube (1) it is arranged that the seam (12) in the area of the bottom and the top wall (9) is arranged running in a recess (11) and that part (17) of the recess (11) in the top wall (9) is the pouring device (10 ) surrounds. Pack according to claim 1, characterized in that the side walls (2-4) form a tube (1) which is quadrangular in cross-section and preferably has rounded edges (6-8), and in that the seam (12) along the diagonals of the top wall ( 9) runs and is interrupted by the pouring device (10). Pack according to claim 1 or 2, characterized in that the parts (1-10) of the pack consist of deformable plastic, preferably a thermoplastic, and the seam (12) surrounding the pack from two welded webs (12 ', 12 " ) is formed (Figure 8). Pack according to one of claims 1 to 3, characterized in that at least two side walls (3, 4) each have a recess (18) as a recessed grip. Package according to one of claims 1 to 4, characterized is characterized in that the pouring device (10) has a separate opening piece (16) made of deformable plastic which is inserted into a hole (13) in the upper wall (9) and (at 19) is welded in the upper wall (9). Pack according to one of claims 1 to 5, characterized in that the opening piece (16) of the pouring device (10) has a lower part (20) and a closure part (21) connected to it via a hinge (22) (Figures 9 to 12) . Pack according to one of claims 1 to 6, characterized in that the lower part (20) is sealed to the closure part (21) along a welding line (25) defining the pouring opening (24) and the opening piece (16) and the pouring opening (24) Receiving cup-shaped recess (23) (Figure 9, 12). Pack according to one of Claims 1 to 7, characterized in that the opening piece (16) is welded along the edge (14) (and along the surface 19) of the hole (13) in the top wall (9) (Figure 9). Pack according to one of claims 1 to 8, characterized in that the closure part (21) has a plate (28) with gripping tip (29) covering the casting surface (30) of the lower part (20). Pack according to one of claims 1 to 9, characterized in that the pouring opening (24) takes up most of the top wall (9) (Figures 13 to 18).

Images