DE2149505A1 - Packaging with a pourable and disposable content - Google Patents

Description

Packaging with a pourable and compressible content. The invention refers to a packaging with a loose and compressible content, especially with a ground, pressed and evacuated oxygen-sensitive Food and beverages, from an outer bowl made of cardboard or similar stiff Material, a container received therein made of a well-sealing, easily deformable Slide the two together at least along the greater part of their upper edge are connected, and from a cover film covering the opening of the container Plastic, metal or the like, which are pressed onto the contents of the packaging into this so that the edge of the cover sheet lies flat against the contents Middle area along the edge of the packaging protrudes up to the top edge.

Free-flowing, oxygen-sensitive food and beverages, such as nuts, almonds, ground coffee and similar products today usually packed in an evacuated state, including the one receiving the contents Packaging, not yet closed, evacuated to such a low pressure is that the solution pressure of the oils and fats is undercut that in the content may be present. This prevents oxidation, i.e. becoming rancid of the oils or fats present.

The actual container holding the content consists of a easily deformable, but gas-tight plastic film, which by the more or less stiff outer bowl on cardboard against otherwise easily possible damage is protected. The container must not be too tightly attached to the outer bowl be because he evacuated together with the bowl in a Pxakuierkammer and afterwards The container is tightly sealed by welding and then opened again it is exposed to atmospheric pressure and because of its compressible content is compressed and thereby shrinks.

The inner container must at least be different from the outer bowl Can solve so far that the usually made of cardboard bowl through the Shrinkage of the inner container is not about to be deformed. Still remain in the case of such evacuated packaging today, the following are listed below Defects: The inner container can be so largely due to its shrinkage from the outer bowl, so that it can be used and handled within the The bowl can wobble around loosely, which is often the result of a faulty result from the buyer Packaging is viewed. This deficiency has a particularly unsatisfactory effect on the buyer, if the evacuation is carried out with a previously only loosely poured content is to which the volume of the cup it must take into account. Also learn the more or less shrunken contents receiving the bowl through its contents no longer sufficient internal support and is particularly common with a normal Stacking is relatively sensitive to pressure and can easily be dented and damaged if it is not made of a particularly hard and thick one, however, accordingly expensive cardboard is made.

A significant alleviation of the aforementioned disadvantages has already been achieved can be achieved by the fact that the contents are already mechanically activated before the baWaktiierung Squeeze paths as much as possible. If the content also follows the Compression back a little bit, that's how you get with one powdery content, for example, can determine that this is the case when compressed The volume of the contents is only reduced by 20% after the pressure is released expanded again by 2f and thus a volume reduction of 18% remained. To the subsequent evacuation, sealing and re-loading of this in a container was just a further shrinkage of found about 3 to 4 <0 of the initial volume, so that the shrinkage of the evacuated contents only slightly larger than after the previous mechanical one Compression is. It is disadvantageous in the case of the known, comparable packaging in addition, that they cannot withstand such mechanical compression, as stated above.

The invention is based on the object of the aforementioned packaging to be completed in such a way that the container holding the contents with the container holding it outer bowl even after the evacuation and re-exposure with atmospheric Air remains connected in such a way that the container cannot wobble around in the bowl and the packaging is one against mechanical compression of the in its content is as insensitive as possible and finally can also be opened in the simplest possible way so that the entire surface its content is accessible.

The stated task is achieved according to the invention in that the Container substantially fills the cavity of the bowl and one from a blank i'eii is unfolded and the filled packaging is closed by a lid which rests on the flat central area of the cover sheet and which is above this protruding edges of the container, the bowl and forming the packaging edge the cover sheet in a correspondingly shaped upwards Gutter w grips, and the middle area resting on the middle area of the cover sheet next to the channel has a perforator running along this.

The proposed container shape adapted to the cup cavity allows without further ado the compression of the recorded content compared to the usual Way outwardly supported bowl without damaging the bowl or the container to be feared. This not only results from the proposed cover a reliable closure of the top edge of the package, but also one easy possibility of extensive opening of the packaging in the inside the middle area of the upper side of the above-mentioned channel of the lid.

According to a preferred embodiment of the invention, the perforation has along the lid in the case of cuboid and, in particular, cube-shaped packaging each straight side edge of the channel only one along almost the entire side edge extending slot part and at each corner a circular arc-shaped curved by about 90 ° Slotted part, which makes it a particularly easy way of cutting through the cover sheet lying under the lid with a conventional table knife and a just as easy the possibility of subsequently separating out the middle part of the Lid and the underlying cover film results from the rest of the packaging.

According to a further, likewise preferred embodiment of the invention there is also a reclosable lid on the lid with one that is adapted to the channel Put on the channel, which forms the channel on the cover by an adhesive fit Part riWitet on the part forming the groove of the lid. Such a wicker lock lid enables the opened packaging to be resealed to a large extent airtight, the content of which is still largely before it becomes rancid, even after the first cracking can remain protected.

Other configurations relate to further details of the invention en packaging.

In the drawing, the invention is illustrated by way of example; The figures show: FIG. 1 a certain for forming the outer cup of the packaging Cardboard blank in a plan view; Fig. 2 the from a blank according to Fig. 1 unfolded outer cup of the packaging in a perspective view Side view; Fig. 3 shows one intended to form an inner container of the package Cutting a plastic film in a plan view; FIG. 4 shows one of FIG. 2 corresponding View of the blank according to FIG. 3, unfolded to form the inner container; Fig. 5 those formed from the outer bowl and the inner container and filled as well evacuated packaging closed by a cover film and a lid, together with a wedge closure lid shown below it in a vertical section; 6 shows the lid of the packaging according to FIG.) In a top view.

The blank 10 shown in Fig. 1 consists of a preferably plastic-coated cardboard on both sides in an essentially square shape, the recesses 11 ', 11 ", 12', 12", 13 ', 13 ", 14 ', 14" and 15' and 15 ". It is to form that shown in FIG tiapfes determined and its intended to form the bottom 13 of the bowl, for example square central area is surrounded by fold lines 16 ', 16 ", 17' and 17". One of the two upper recesses 11 'and 11 "is connected to the fold line 16' upper pocket IS 'and through the two lower recesses 12' and 12 "one to the lower fold line 1b "adjoining flap 19" each laterally limited. I) ie iier Corners 20 of the bottom 18 are opposite the subsequent Recesses bounded by a curved hand line each.

To produce the bowl shown in FIG. 2, the blank 10 first follow the two flaps 1S 'and 19 "along the folding lines 16' and 16" bent at the top, whereupon the outwardly adjoining the fold lines 17 'and 11 " both side walls 21 'and 21 "along the last-mentioned fold lines as well be bent over at the top. Then the upper and lower edges according to FIG. 1 of the side walls 21 'and 21 "each on the outside of the associated tabs 1C3 'or 19' 'bent in pairs against each other so that on the one hand the according to Fig. 1 upper edges of the two side walls 21 'and 21 "on the one hand and on the other hand 1, the lower edges of the two side walls 21 'and 21 "on the opposite one Touch the side of the cup thus formed along its edges; see the one in FIG. 2 on the side visible on the right there in the middle vertical joint line. As FIG. 2 also shows that they lead along the laterally opposite sides according to FIG Edges of the side walls 21 'and 21 "located recesses 14', 15 'and 13', 13 "and 14", 15 "in the unfolded bowl according to FIG. 2 to four along the the upper edge of the cup distributed recesses, each located in the central area of the four long edges of the roughly square edge.

The recesses 14 'and 15' unite on the one hand and 14 ", 15" on the other hand to a common recess.

Otherwise, form due to the rigidity of the cardboard material at the four corners 22 of the upper edge much larger roundings than at the aforementioned lower corners 20 of the packaging.

The inner container of the packaging consists of a gas-tight, easily deformable film, which must have the appropriate vacuum tightness. What is meant here is a vacuum at which the air pressure is equal to the solution pressure of oxygen in aromatic oils and fats that are to be packaged in the Goods, in particular food and beverages are available.

For example, if it is finely ground coffee, the one contains a whole range of aromatic oils, then it must be taken into account that the solution pressure of oxygen in these oils is slightly above 4 mb and a partial pressure corresponding to an air pressure of about 20 mb. Oxygen of higher partial pressure leads to a solution and subsequent oxidation of the aromatic oils that make up the The taste of the oil and thus of the coffee changes significantly and leads to the coffee becomes "rancid". However, the partial pressure can be below the aforementioned No oxidation can occur. It is therefore It is already common practice to put ground coffee down to a pressure of during packaging about 4 mb to evacuate.

When the vacuum motor is vented, the previously gas-tight, the coffee-receiving film-like container through the external rebuffing compressed with atmospheric pressure, whereby the total pressure increases somewhat, the partial pressure of the oxygen but with sufficient certainty below the so-called Solution pressure remains. If only, of course, the given numerical values are approximate, the actual values are in the specified range Magnitude.

Both metal foils are used as foils for the aforementioned container as well as some plastic foils. If metal foil is used, it should these should be appropriately coated with plastic so that they can be welded by plastic for example with a plastic coating covering the filled container Cover film 35 (see FIG.) And / or with the inner plastic coating of the bowl can be welded tightly. Direct welding of metal foils would require such a high level of welding heat that it would usually make the person sensitive to heat Incinerate the contents of the packaging or distill dry and then would char.

Fig. 3 shows the blank of a suitable for forming the container Foil that, depending on the deformation resistance, either directly through a deformation device or after a previous application of the fold lines explained below the container shown in Fig. 4 can be reshaped.

If, as a rule, also an immediate unfolding by means of a corresponding Device will be possible, a folding along suitable below Folding lines explained in more detail: According to FIG. 3, the one that forms the bottom 23 of the container approximately square If the middle part of the blank shown by a dashed line indicated fold line 24, which in equation to the corners 20 of the bottom 18 of the cup shown in Fig. 2 also has rounded corners. from the corners radiate out more crease lines to the outside, like them at one corner are designated by 25, 26, 27 and 28, for example. In the Forming in the container shown in Fig. 4, you first fold the between the corners located approximately rectangular side wall parts at right angles upwards, i.e.

also the two side wall parts adjoining the last-mentioned corner 29 and 30, the actual corners still remaining outside. Then will also the corners' bent upwards, with those adjoining the actual corner, respectively triangular wall parts located between the fold lines 25 and 26 and 27 and 28 in the from lig. 4 visible way to the outside of the side wall parts 2 b: w. 30 folded down. Furthermore, the container shown in FIG. 4 can be in the area its lower corners in the manner shown in FIG. 3 by welding lines 31 ', 31 "and 32' and 32" are stiffened, each of which is the welding line 31 'and 31' 'as well as 32' and 32 '' together form a weld seam through which the container shape shown in Fig. 4 even when using the said soft Plastic guaranteed remain. At the bottom 23 you can do this form small folds 31 in the area of the corners, along which the corners also follow rounded at the top.

The container prepared in this way is now placed in the bowl according to FIG. 2 inserted and filled with the contents to be packaged. The content is then preferably after the cover film 35 has been put on and one which will be explained below Cover 36, from above in the part described, the outside in not particularly depicted way supported packaging pressed into it, after which the packaging assumes the form shown in FIG. By pressing in the content the inner container is so closely connected to the outer cup that in FIG. 5 the part of the packaging formed together as a result is shown as a part 33. The pressed-in content is indicated in FIG. 4 by cross-hatching denoted by 34. As can be seen, the edge of the cover sheet 35 is through the aforementioned Pressing the contents 34 upwards along the edge of the part 33 of the packaging beaded. The cover film 35 expediently consists of the same plastic weldable foil material like the inner container. Now finds expedient a preparatory weld in the eclc areas of the upper edge of the filled and sealed, but not yet provided with the lid 36 packaging instead, through which the cup, the container and the cover film 35 are vacuum-tight at these points to be verbunaen with each other. however, these welds should be those in the central area the side edges of the approximately square upper edge located recesses Leave 13 'and 13 "as well as 14', 15 'and 14" and 15 "of the bowl free. In these The packaging is then e.g. ready for evacuation.

The subsequent evacuation takes place in a vacuum chamber, in which the pressure is lowered to the already described negative pressure. the inside the packaging Air can pass through the at the location of the grooved recesses 13 'and 13 "and 14', 15 'and 14", 15 " remaining gap openings escape. After the required vacuum has been reached then, while maintaining the vacuum, these gaps are also sealed shut.

At this point it should be noted that a vacuum-tight welding plastic is easy to carry out at atmospheric pressure, such However, welding in a vacuum chamber under vacuum is much more difficult to carry out is why the welds made under vacuum relatively often the Have a tendency to leak after a certain period of time. With the described Packaging, however, reduces the risk of later leaks in that at the aforementioned points only the inner container with those protruding at these points Edge parts of the cover film 35 must be welded vacuum-tight. After completion After this welding, the vacuum chamber can be supplied with atmospheric pressure again and the filled and vacuum-tight sealed packaging is removed from the vacuum chamber will.

Since the given packaging along its upper edge and in the Area of the upper cover sheet made of an only thin metal or plastic after too is sensitive to shock loads and other damage the aforementioned cover 36 is provided to protect the upper area of the packaging.

This can preferably be done by deep-drawing a harder and optionally Stronger plastic sheeting can also be made, making it one the square The upper edge of the closed packaging is given a groove 37 that is also adapted from Fig. 6 can be seen. It serves to accommodate the upper edge of the aforementioned Way filled and sealed packaging.

The lid 36 on the upper edge of the packaging can still be thereby be specified that the packaging is previously with its named edge facing down turned and dipped in molten wax, then the lid 36 pressed on the edge will. That is also located in the channel 37 After it has cooled down, wax creates a sufficiently strong connection between the Packaging and the lid 36.

As can also be seen from FIG. 6, the approximately square Lid 36 in its central region 40 enclosed by the channel 37 along each straight side edge of the channel 37 running almost along the entire side edge Slot part 38 and at each corner a subsequent circular arc-shaped curved by approximately 90 ° Slot part 38 ', with only one between the slot parts 38 and 38' short, non-slotted web part 39 remains. The packaging can be due to open the mentioned slot parts 38 and 3U 'easily with a conventional table knife, which by the slot parts 3d and at the same time by the underlying Parts of the cover film 35 is pierced through, whereupon the cover film 35 along each of the slot parts 38 is further cut open.

These cuts can then be made through the connecting web parts 39 are continued, whereupon the central region 40 of the cover 36 is lifted off and thus at the same time also the central area of the cover film 39 located underneath, if necessary after being torn off, it is approximately still more coherent with the outer part of the cover film 35 small corner parts of the square central area can be removed. Thereupon the entire contents of the opened package are easily accessible.

As can also be seen from FIGS. 5 and 6, the cover 36 outside its channel 37 still with a short horizontally beaded outwards, to be provided for its stiffening outer flange 41.

While the illustrated and written packaging of simplicity holder is almost exactly cube-shaped, in practice it is preferred to form them slightly inclined upwards outwards, so that the surface of their bottom smaller than that area of the middle area lying between the channel 37 40 of the lid, whereby the packaging described can be easily stacked and in particular a lateral slipping of the packaging that adjoins the top is made more difficult because their bottoms are each on the packaging underneath within the elevation formed by the channel 37 directly on the central area 40 of the lid 36 of the packaging there.

So that the packaging, once opened in the aforementioned manner, the contents of which have not yet been completely removed after the first opening in the Hegel can be closed again as airtight as possible despite the opening, Eats according to FIG. 5, a reclosable lid 43 is also provided, the one has the inside of the outer contour of the channel 37 of the cover 36 adapted channel 42 and can be pushed onto the cover 36 from above in such a way that its groove 42 on the part of the cover 36 forming the channel 37 with sufficient clamping adhesion stuck. The packaging described can thus each be fitted with an additional Reclosing lid 43 are supplied, which also has an outwardly protruding Has outer flange, from which he overcomes the aforementioned clamping adhesion can easily be removed from the rest of the packaging before the actual, the above-mentioned opening of the packaging takes place. The llacli fulfills de; n Open and after the first use of the actual packaging, put the reclosable lid back on 43 at the same time all the conditions of the other previously customary, easy-to-set-up conditions Lid.

Patent claims:

Claims (8)

Patent pending packaging with a pourable and compressible Contents, especially with a ground, pressed and evacuated oxygen-sensitive Food or luxury food, from an outer bowl made of cardboard or similar stiff Material, a container received therein made of a gas-tight easily deformable Slide the two together at least along the greater part of their upper edge are connected, and from a cover film covering the opening of the container Plastic, metal or the like, which are pressed onto the contents of the packaging into this is, so that the edge of the cover sheet of its resting flat on the content lowing The middle area along the edge of the packaging protrudes up to the top edge of the packaging, characterized in that the container substantially covers the cavity of the cup fills and is a part unfolded from a blank (10) and the filled Packaging is completed by a lid (36) that is on the flat central area the cover film (35) rests on it and the edge of the packaging protruding above it forming edges of the container, the bowl and the cover film (35) in a corresponding manner upwardly shaped groove (37) engages, and in its on the central area the middle region (40) resting on the cover film (35) next to the channel (37) along a this has running perforation (38, 38 '). 2. Packaging according to claim 1, characterized in that the perforation in their length the length of the remaining between the slot parts (38, 38 ') Has slit parts (38, 38 ') exceeding web parts (39). 3. Packaging according to claims 1 and 2, the cuboid and in particular is cube-shaped, characterized in that the perforation is along each straight line Side edge of the channel (37) only runs along almost the entire side edge Slot part (38) and at each corner a circular arc-shaped curved by about t300 Has slot part (3 @ '). 4. Packaging according to one of the preceding claims, characterized in that that the cover film (35), which is made of plastic at least on the one hand, along its Edge welded to the edge of the container, which is also made of plastic is. 5. Packaging according to one of the preceding claims, characterized in that that the lid (36) on the upper edge of the packaging covered by the cover film (35) is additionally fixed by a lanyard. 6. Packaging according to claim 5, characterized in that the connecting means consists of a wax, in particular plastic wax. 7. Packaging according to one of the preceding claims, characterized in that that on the cover (36) there is also a reclosable cover (43) with one of the channels (3!) Adapted channel (42) is placed, which on the cover (36) thereby a Adhesive fit of its part forming the channel (42) on the channel (37) of the cover (36) forming part is liable. 8. Packaging according to one of the preceding claims, characterized in that that it is slightly inclined upwards outwards in a manner known per se and the The area of their bottom is smaller than the area of the area between the channel (3i or 42) Miitelbereiches (40) of the lid (36) or the reclosable lid (43) is.