WO2005113347A1

WO2005113347A1 - Container

Info

Publication number: WO2005113347A1
Application number: PCT/EP2005/005406
Authority: WO
Inventors: Gianfranco D'amato
Original assignee: Seda S.P.A.
Priority date: 2004-05-18
Filing date: 2005-05-18
Publication date: 2005-12-01
Also published as: KR100847041B1; CA2567340C; BRPI0510402A; DE202004007969U1; JP4818263B2; US20080087714A1; RU2006141346A; NO20065824L; CN1984817A; AU2005245116A1; CA2567340A1; RU2362716C2; JP2007537939A; EP1747148A1; NZ551865A; AU2005245116B2; TW200600432A; UA88306C2; MXPA06013453A; KR20070028416A

Abstract

The invention relates to a container (1) for holding foodstuff, comprising at least one paper layer (3) and a container wall (4) having an additional layer (4). Said container (5), on its upper end (6), has a container opening (7) and is closed on its lower end opposite said container opening. At least the container wall is formed from a two-dimensional cut (9) that is joined to form a continuous container wall. At least one inspection window (10) is configured in the container wall and is obturated by a transparent or translucent window film (11). The container wall is at least partially curved in the area of the inspection window (10) and the window film for sealing the inspection window is hot-sealed with the paper layer (3).

Description

DESCRIPTION

CONTAINER

The invention relates to a container for holding a food with at least one layer of paper and a further layer having a container wall, the container having a container opening at its upper end and being closed at its lower end opposite the container opening, at least the container wall being formed from a two-dimensional blank is, which is connected to form a continuous container wall, and wherein at least one viewing window is formed in the container wall, which is closed by a transparent or translucent window film.

Such a container is known in practice, for example, for essentially cuboidal liquid containers. In a flat side wall, these have a viewing window which extends in the longitudinal direction of the container and which serves to check the fill level of the liquid filled in the container. The paper layer of the container is made of relatively stiff cardboard material and has a fluid-tight additional layer made of a plastic material on its inside. The viewing window is essentially formed only in the relatively rigid paper layer and is closed on the inside of the container by the corresponding fluid-tight film, which is transparent or at least translucent.

Other essentially cuboid containers are known from practice, which are used, for example, to hold dry food such as rice, pasta, flour, sugar or the like. In these, a film is generally glued in from the inside of a viewing window in a flat side wall of the container.

In these previously known containers, the paper layer is relatively stiff and made of cardboard material, for example. This paper layer, together with the corresponding folds to form the top and bottom sides and the side surfaces arranged in the circumferential direction, gives the container a relatively high rigidity. In this context, the window film only serves as a cover for the speaking viewing window so that a liquid or a dry food cannot leave the container through the viewing window.

The invention has for its object to improve a container of the type mentioned in such a way that even when using very thin paper layers and without further folds or fold lines of the corresponding cut to form a three-dimensional container, sufficient stability of the container is possible while maintaining a corresponding viewing window ,

This object is solved by the features of claim 1.

According to the invention, the container is characterized in particular in that the container wall is at least partially curved in the region of the viewing window. This curved course results in increased rigidity and thus stability for the finished container. In order to increase the stability in this connection, the window film for sealing the viewing window is heat sealed with the paper layer. Such a heat seal results in intimate contact between the window film and the paper layer, which in addition to the curvature of the wall further stabilizes and stiffens the container wall and thus the container.

With the features according to the invention, a viewing window is also possible for very thin-walled containers, although the corresponding rigidity and stability of the container is still sufficient, for example, to remove food from its container opening.

It should also be noted that the viewing window in the curved area of the container wall and the heat sealing of the window film at least in this area also support the dimensional stability with regard to the shape of the container. Without the features according to the invention, such a container would otherwise not be sufficiently dimensionally stable without filling in order to be able to simply fill or store it, for example. The corresponding curvature of the container wall in the region of the viewing window results in sufficient stability in the circumferential direction as well as in the longitudinal direction of the container.

According to the invention, it is even sufficient if the window film is heat-sealed to the paper layer at least in the area of a viewing window edge. This heat sealing then takes place at least along the entire edge of the viewing window in order to adequately seal the viewing window. In principle, another type of fastening between window film and paper layer can also take place outside the window edge or further away from the window. - - - ^■ - ^•

In order to make the paper layer particularly fluid-tight with respect to gases and liquids, in particular on its outside, the further layer can be a metal layer, in particular an aluminum layer. These are easy to manufacture and can be connected to the paper layer. Such a metal layer is advantageously applied to a corresponding outside of the paper layer. In addition or alternatively to the metal layer, a plastic layer can be applied as a further layer to a corresponding inside of the paper layer. This plastic layer is for example made of polyethylene or another plastic such as, polypropylene, polyvinyl chloride, polystyrene or the like.

The corresponding further layer is used in particular for barrier properties, that is to say it serves for the appropriate tightness with regard to gas and liquids. In addition, a metal layer is particularly helpful for edge formation when the opening edge is curled, bent or otherwise deformed. The metal layer can also make it easier to tear open the container. The paper layer mainly serves to stabilize the container and is usually thicker than the other layer.

The container opening at the upper end of the container is surrounded by an opening edge. In a simple embodiment, this can be formed by an upper edge of the two-dimensional blank. The edge can be a simple cut edge without separate treatment if, for example, little or no contact with liquid is to be expected in this area. There is also the possibility that the opening edge is folded, rolled or folded, in particular without changing the properties of the container wall. Processing the opening edge in this way results in additional stiffening of the container in the region of the container opening. In addition, such a machined opening edge can be more easily used to attach a lid, film, or other opening cover.

This processing of the opening edge can also only take place after the appropriate food has been filled in.

In order to bond the metal layer and the paper layer to one another in a simple manner and sufficiently firmly, they can be connected to one another by an adhesive and in particular laminated. The overall lamination simplifies the production of the two interconnected layers and thus the corresponding cut for the container.

Depending on the shape of the container or the amount of the filled-in food, there is the possibility that, for example, the metal layer or the plastic layer is only applied to a certain area of the paper layer and is connected to the paper layer. To simplify the production of the blank from the two layers, however, these can be essentially congruent, that is to say they have the same dimensions, so that they are congruent with one another.

In the area of the viewing window, it can also be advantageous if the further layer covers corresponding free edges of the paper layer that surround the viewing window, or is even laid around the inside or outside of the paper layer in the area of the viewing window.

As a rule, folding edges that extend in the longitudinal direction of the container stiffen the container. According to the invention, it is possible that there are no such folded edges and the container is essentially rotationally symmetrical. That is, in cross section the container can be circular or oval. Corresponding stiffening or folding edges are not necessary according to the invention.

To adequately seal the viewing window and to achieve the stability-supporting effect, it is sufficient according to the invention if the window film is geometrically similar to the viewing window. This means that the window film has essentially the same geometric shape as the viewing window, but takes place over larger dimensions, so that a heat seal can take place along the window edge between the window film and paper layer. This heat sealing is usually carried out under the influence of heat and pressure, so that the intimate connection between the window film and the paper layer is established.

With respect to the window film should also be noted ^that these by heat sealing on the inside of the paper sheet on the inner side of the plastic layer as an additional layer on the outside of the metal layer as an additional layer, that is on the outside of the container, and also for example along the window border between Paper layer and another layer arranged and there can be heat sealed.

There is also the possibility that if several viewing windows are arranged, only one window film is sealingly assigned to them. The corresponding heat sealing can take place on the one hand along an area which surrounds all viewing windows or on the other hand also separately for the edge of each viewing window.

It is also possible for the window film to be heat-sealed essentially on the entire inside of the paper layer. This simplifies production overall, since no smaller window film sections have to be assigned to each of the viewing windows of a blank. The production of such a blank from essentially three layers, that is to say the metal layer, paper layer and window film, can likewise take place in the manner of a laminate and in particular in one operation.

Various materials are conceivable for the window film, which are transparent or at least translucent in particular even after being connected to the paper layer. These materials should also be suitable for heat sealing. Examples should rather materials are polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyamide, polyethylene or the like.

In order, in particular, to be able to produce the container wall from the blank in a simple manner, the blank can be connected to itself by heat and / or pressure and / or by using an adhesive.

The connection of the blank to itself can be done in different ways.

In a conceivable embodiment, the blank is connected to itself along side edges of the blank that are arranged in abutment. As a result, the outer surface of the container is relatively smooth since there is no overlap and the thickness of the container wall is constant, in particular along the circumference of the container.

A simpler embodiment for connecting the blank to itself can be seen if it is connected to it along an overlap region which extends in particular in the longitudinal direction of the container. As a rule, this overlap area does not cover the window film, but only the layers of paper and metal arranged one above the other and connected to one another. The corresponding connection of the blank takes place, see also the above explanations, by means of an adhesive and, if appropriate, additionally by supplying heat and / or pressure.

In order to further optimize the container, in particular the container wall, if necessary, for removing a foodstuff, edges of the blank can be fluid-tight. This fluid tightness relates, for example, to the edges surrounding the viewing window, the edge forming the opening edge and also an edge which may be arranged in the interior of the container. Such fluid tightness can also be achieved by applying an appropriate sealant by using a further film made of a plastic material. Such a plastic film can in particular cover the paper layer in a fluid-tight manner outside the window film. There is also the possibility that this plastic film between the paper layer and the window is arranged. In this case, the heat seal between the window film and the plastic layer can be carried out.

To improve the optical design of the container, the metal layer can have an imprint on its outside. Such an imprint can serve both to identify the content and for advertising purposes or the like.

Imprints with a three-dimensional effect are also possible, as a result of which the optical appearance can be further improved. Such an imprint with a ^{1-dimensional} effect is for example a hologram. ^•

The imprint can be arranged anywhere on the outside of the container, it also being possible to imprint on the viewing window or on the corresponding window film. A simple example of such a print directly on the viewing window is, for example, a fill level marking from a scale or the like.

There are essentially no restrictions to be observed when it comes to the graphic design or coloring of the print, since the metal foil in particular can be printed well.

In the area of the viewing window it can also prove to be advantageous if it has an imprint that is only visible after the food has been at least partially removed. If, for example, such a window print has the same color as the food arranged in the container, the print is only visible when the food has been removed. This can be used for a surprise effect and also for competitions or the like.

Various shapes are conceivable for the container. One form is, for example, a cone in which a waffle or the like is arranged for ice cream as food. Instead of a waffle, the ice cream can also be wrapped in chocolate or another material that is more stable and edible compared to the ice cream. This can first be inserted or filled into the container and can then be used with the Ice cream to be filled. The container essentially serves only as a cover for a waffle or chocolate cover.

Another container shape is a so-called squeeze container, which is also essentially conical. At its lower end, such a squeeze container generally has a flag-shaped continuation, which is formed by compressing the lower end of the container and connecting the container wall to itself. From this flag-shaped end, the contents can be removed from the container by further manually squeezing the container wall through the upper container opening.

Finally, the container can also be essentially cup-shaped and used for cold or warm drinks. In such a cup-shaped container, the closed end of the container can have a bottom insert, which, if appropriate, and a lid closing the container opening, in particular, are formed from an at least partially transparent material. The use of such a floor insert and its connection to the container wall is known per se.

If this bottom insert and / or the lid are also made of transparent material, they can be used in addition to the viewing window to look inside the container.

Regardless of the shape of the container, it is to be considered favorable according to the invention if such a container can be stacked and unstacked.

If the interior of the container can be inspected essentially over the entire container height through a corresponding viewing window, such a viewing window can extend essentially in the longitudinal direction of the container. This shows in particular how the fill level in the container gradually decreases as a result of the food being consumed. It can also be seen whether a specified amount of food is actually filled in the container. The viewing window or windows can have different geometric shapes and can be arranged in different ways. Examples of viewing window shapes are square, in particular square, oval, round, essentially rhombic or other shapes. Several of such viewing windows can be arranged side by side and / or one above the other in the container circumferential and / or container longitudinal direction. There is also the possibility that different geometrically shaped viewing windows can be combined with each other in one container. Arrangements of viewing windows which result in a specific geometric pattern are also possible, such as circular viewing windows with a diameter decreasing up or down in the longitudinal direction of the container, an arrangement of viewing windows which correspond to an abstract face or the like or which represent familiar figures or the like in children.

Another form of viewing windows runs essentially in a spiral around the longitudinal direction of the container. Here, too, several viewing windows can be arranged in one container at the same time.

In one embodiment according to the invention, the food can be removed from the container via the container opening. For this purpose, a cover arranged in this area may have to be removed.

The lid can be removed using an appropriate lid handle without damaging the container wall. There is also the possibility that the upper region of the container wall is removed together with the lid, a tear line being formed in the container wall in this region, for example. Such a tear line can be designed in different ways. An example is material weakening.

In order to facilitate tearing open in the area of such a tear line, the tear line can be assigned a tear handle.

The tear line can essentially also run along an upper and / or lower edge of the viewing window. It can pass through an edge of the window film be educated. This also applies analogously to a plurality of viewing windows arranged one above the other, spiraling or arranged in another way.

If the tear line is arranged in the region of the viewing window, it can furthermore prove to be advantageous if the tear handle is arranged on the window film or, if appropriate, formed by it. As a result, the corresponding area of the container wall along the tear line or lines is removed by means of the tear-open handle and the window film connected to it, and the interior of the container is sufficiently accessible for food removal.

The invention also relates to a corresponding two-dimensional blank for producing a container described above.

With regard to such a cut, it should also be noted that viewing windows can be produced essentially in two different ways and can be sealed tightly by the window film.

In a first exemplary embodiment, the blank is first made up of only paper layer and metal layer. In this blank, the viewing window (s) are arranged by cutting or punching out before the window film is attached. The corresponding blank does not have to be a single blank, but can be a blank in which several blanks are arranged relative to one another. Only after the corresponding viewing window has been produced is the window film then heat-sealed to the inside of the paper layer by means of heat and / or pressure.

In a further exemplary embodiment, the viewing window can also be produced after the window film has been applied by cutting or punching out only the paper and metal layer. The cutting out or punching out takes place from the side of the blank which later forms the outside of the container, a corresponding cut into the container wall or into the blank being made only by means of the metal layer and paper layer, but not as far as the window film heat-sealed on the paper layer. In the following, advantageous exemplary embodiments of the invention are explained in more detail with reference to the figures enclosed in the drawing.

Show it:

Figure 1 is a perspective side view of a first embodiment of a container according to the invention;

Figure 2 is a perspective side view of Figure 1 of another embodiment of a container according to the invention;

Figure 3 is a side view of another container according to the invention with a special shape for a viewing window;

Figures further exemplary embodiments with other viewing windows;

4 to 8

FIG. 9 shows a section along the line IX-IX from FIG. 1;

FIG. 10 shows a section along the line X-X from FIG. 1;

FIG. 11 shows a perspective side view of a further exemplary embodiment of a cup-like container according to the invention, and

FIG. 12 shows a plan view of a two-dimensional blank for a container according to the invention analogous to FIGS. 2 to 8.

FIG. 1 shows a perspective side view of a first exemplary embodiment of a container 1 according to the invention. This is essentially conical and has at its lower end 8 a flattened flag 33 which is formed by flattening the container wall 5 in this area. This serves, for example, as a handle for the container 1. A corresponding foodstuff 2 that is inside the container ter 1 is filled, can be squeezed out of the flag 33 in the direction of the container opening 7 at the upper end 6 of the container 1 by squeezing the container 1 together.

In the manner of an abdominal bandage, the container 1 has a viewing window 10 which extends at least over part of the container wall 5 in the circumferential direction of the container 1.

The container opening 7 is surrounded by an opening edge 13 which, in the exemplary embodiment shown, is rolled radially outward.

In Figure 2, a second embodiment of a container 1 according to the invention is shown in perspective side view. This differs from the container according to FIG. 1 by essentially the absence of the flag 33 at the lower end 8. A food 2 is filled in the container 1 analogously to FIG. 1 up to a filling level 28. Five viewing windows 10 are arranged in the area of the food 2. These are circular and designed in the longitudinal direction 23 of the container towards the lower end 8 with a decreasing radius. The corresponding viewing windows 10 are arranged vertically one above the other in the container wall 5.

In the case of the container 1 according to FIG. 2, in a further exemplary embodiment, further viewing windows 10 can be arranged offset in the circumferential direction 24 of the container wall 5 from the visible viewing windows. An example is an arrangement offset by 90 ° in each case, or also offset by 180 °.

FIGS. 3 to 8 show further exemplary embodiments of a container 1 according to the invention, which essentially differ from the container 1 according to FIG. 2 in terms of shape, arrangement and number of viewing windows 10. The same reference numerals designate the same parts in these figures as in the other figures and are only partially mentioned in connection with each figure.

In the embodiment according to FIG. 3, two viewing windows 10 of essentially square shape are arranged obliquely and offset parallel to one another in the vertical direction or in the longitudinal direction 23 of the container, see FIG. 2. The Viewing window arranged closer to the lower end 8 has a shorter length in the circumferential direction 24.

A substantially trapezoidal viewing window 10 is arranged in the container wall 5 in FIG. With its non-parallel sides, this runs parallel to the conical shape of the container, while the parallel sides of the trapezoidal shape extend in the circumferential direction 24, see also FIG. 2.

In the exemplary embodiment according to FIG. 4, a cover 22 is inserted into the container opening 7. This has along its edge an upstanding flange which is glued to an inside of the container wall 5, for example.

In FIG. 5, the viewing window 10 has an elongated in the longitudinal direction 23 of the container. oval shape. On the side next to the viewing window 10, a scale 34 is printed on the outside 20 of the further, outer layer 4, see also FIG. 9, of the container 1. A corresponding imprint can also be provided directly on the viewing window 10.

In the exemplary embodiment according to FIG. 5, a cover 22 similar to that in FIG. 4 is provided. This differs from the lid already described in that its edge flange is arranged and held there by an inwardly folded opening edge 13 between it and the inside 14, see again FIG. 9, of the container wall 5.

In FIG. 6, a viewing window 10 which is spiral-shaped around the longitudinal direction 23 of the container is arranged.

In the exemplary embodiment according to FIG. 7, the viewing window 10 extends essentially in the circumferential direction 24 and is arranged at a distance from an overlap region 17 and from the upper and lower ends 6, 8, see also FIGS. 1 and 2, of the container 1. The overlap region 17 is formed by side edges, one on top of the other and partially overlapping, see also FIG. 12, of a two-dimensional blank for such a container 1. In this overlap area 17 is the Cutting connected to itself. A separate adhesive can be applied for such a connection. The connection can be made by applying heat and / or pressure in the overlap area.

In addition to this connection with an overlap, it is also possible to connect the corresponding side edges 15, 16, see FIG. 12, of the two-dimensional blank 9 in the case of a butt-to-butt arrangement of these side edges.

In the exemplary embodiment according to FIG. 7, the container wall 5 has a tear-open handle 27 resting on the outside thereof. Notches 35 are provided between this and the edge 15 of the two-dimensional blank visible on the outside of the container, which notches facilitate opening the container wall to open the container 1. This tearing open can be supported by corresponding tear lines 25, 26, the tearing taking place essentially along these tear lines 25, 26.

In FIG. 7, the upper tear line 26 extends parallel to the opening edge 13 between the latter and an upper edge of the viewing window 10. The second tear line 25 first runs obliquely downward from the corresponding notch 35 to approximately the lower edge of the viewing window 10, a lower edge of the In this area, heat-sealed window film 11, see also FIG. 9, is used to determine the tear line 25.

With other tear lines 25, 26, these can be formed by material weaknesses in the container wall 5 or by partial incisions in corresponding layers of the container wall.

In FIG. 8, the container 1 has a flat lid 22 with a lid flap 29 protruding obliquely upwards. This cover 22 is applied to the free edge of the opening edge 13 and fastened there.

The viewing windows 10 shown in FIG. 8 have different geometric shapes. The arrangement corresponds to an abstract face. FIG. 9 shows a section along the line IX-IX from FIG. 1.

This section is particularly occupied by a viewing window 10. The container wall 5 is formed from essentially two layers. An inner layer 3 is a paper layer and an outer layer 4 is a metal layer, in particular an aluminum layer. The layers 3 and 4 are generally congruent to one another, so that they are congruent in the blank 9 according to FIG. The layers are connected to one another by an adhesive and by application of heat and / or pressure, and in particular laminated.

The metal layer 4 can have an imprint on its outside 20. This can serve for advertising purposes or to mark the content of the container 1. In addition, the imprint can have a three-dimensional effect, be a hologram, be monochrome and multicolor, and the like.

A corresponding imprint can also be applied to the viewing window 10, this imprint being visible, for example, only when the corresponding food has been removed from the container 1 to such an extent that it is only arranged below the viewing window 10. This can be realized, for example, in that the color of the print 10 and the color of the filled-in food are the same.

A transparent or translucent window film 11 is applied to the inside 14 of the container 1 or the paper layer 3 at least along an edge region of the viewing window 10. Along the corresponding edge, this is sealed in the heat sealing area 32 to the paper layer 3 on the inside 14 thereof. In this context, the corresponding viewing window 10 is surrounded by cut edges 30, 31 of the metal layer 4 and the paper layer 3.

There is also the possibility that the metal layer 4 extends around the corresponding cut edge of the paper layer 3, possibly on the inside 14 thereof. FIG. 10 shows a section XX from FIG. 1. In the area of the container opening 7, the opening edge 30 is rolled radially outward, the corresponding container wall 5 being formed from the paper layer 3 and the metal layer 4 in this area. Corresponding characteristics of the container wall 5, such as fluid tightness or the like, are not changed by this rolling in of the opening edge 30.

FIG. 11 shows an essentially cup-shaped container 1 as a further exemplary embodiment. This has a viewing window 10 which extends and extends obliquely essentially over the entire height of the container 1.

The container 1 is closed opposite its container opening 7 at its lower end 8 by a bottom insert 21. Such a floor insert generally has a bottom edge flange 37 which is essentially vertically downward from the actual bottom surface 36. This is clamped by an upwardly folded-over wall edge of the container wall 5 between the latter and the inside 14 of the container wall 5 and held there tightly.

FIG. 12 shows a top view of an exemplary embodiment of a two-dimensional blank 9 for a container in the form of the exemplary embodiments according to FIGS. 2 to 8. Corresponding two-dimensional cuts for exemplary embodiments of the containers according to FIG. 1 or FIG. 11 are evident.

The two-dimensional cut according to FIG. 9 has left and right side edges 15, 16 and lower and upper side edges 19, 18. With regard to the left and right side edges 15, 16, their connection butt-to-butt or by an overlap area 17, see FIG. 7, has already been pointed out.

The upper edge 18 of the blank 9 correspondingly forms the opening edge 13, see the previous figures. This opening edge can also be rolled up, see FIG. 10, folded over, folded or deformed in some other way.

Three viewing windows 10 arranged essentially parallel to one another are formed in the blank 9. These are sealed by appropriate window films 11, which are heat sealed along viewing window edges 12 to the inside 14 of the paper layer 3.

In the illustrated embodiment, a window film 11 is for a viewing window

10 and a further window film 11 are provided for two viewing windows 10. There is also the possibility that corresponding window films 11 are used separately for each viewing window 10 or only one window film 11 for all viewing windows 10, see also the other exemplary embodiments. In the area of the corresponding viewing window 10 and along its viewing window edges 12, at least the heat sealing takes place in the corresponding heat sealing area.

There is also the possibility that a corresponding window film 11 extends over the entire inside 14 of the paper layer 3 and is heat-sealed there with the outside of the viewing window 10.

When arranging the window film for a viewing window according to FIG. 12, it can be seen that window film 11 and viewing window 10 are geometrically similar to one another. This means that the geometric shapes of the window film and the viewing window are the same, but the dimensions of the window film 11 are larger, so that it projects beyond the viewing window 10 and can be heat-sealed along the viewing window edge 12 thereof.

In addition, in FIG. 12, see also FIG. 7, a tear-open handle 27 with corresponding notches 35 is shown.

In all of the exemplary embodiments according to the invention, see FIGS. 1 to 8, 11 and 12, the viewing windows 10 are arranged in a region of the containers 1 which has a curved container wall 5. This curvature of the container wall means that the stability and stiffness of the container 1, even with thin layers, in particular thin paper layer 3 and thin metal layer 4, is sufficiently large to be able to safely handle or store such a container, for example for filling with food. The heat-sealed window films ensure stability and dimensional stability

11 improved. Analogously to the corresponding viewing windows 10, these also extend in curved regions of the container wall 5. The corresponding edges of the window film 11 serve as tear lines 25, 26, see also FIG. 7. As a result, tear lines 25, 26 to be arranged separately in the container wall 5 are not necessary.

The illustrated exemplary embodiments of the containers 1 are all essentially rotationally symmetrical. However, there is also the possibility, see in particular the container 1 according to FIG. 1, that it has an oval cross section, since such an oval cross section is easier to squeeze.

With regard to the cut 9 according to FIG. 12 and also the analog cuts for other exemplary embodiments of container shapes, it should also be pointed out that there are essentially two production examples.

In the first production example, the container wall 5 is in the form of the paper layer 3 and the metal layer 4 as a laminate. A corresponding window 10 or a plurality of these windows is introduced into this by cutting or punching out. Then the window or the windows are sealed along their edges by means of window films 11 applied by means of heat sealing.

In the second production example, the corresponding blank 9 is in the form of a container wall made of paper layer 3, metal layer 4 and window film 11. Only then are the corresponding windows 10 produced by cutting or punching out using a kiss cut method, with this method the viewing window being produced only in the paper layer and in the metal layer, while the window film remains unaffected.

Different, in particular thermoplastic plastics that are transparent or translucent are possible for the window film. One example is polyethylene.

It is also possible for the base insert 21 or the cover 22 in the various exemplary embodiments to be formed from an at least partially transparent or translucent material. In this way the content of the container ters 1 also visible from above through the container opening 7 or from below through the bottom of the container.

In a further exemplary embodiment according to the invention, the tear-open handle 27, see for example FIG. 12, is not formed by paper layer 3 and metal layer 4 of the container wall 5, but can also be realized by a corresponding extension of the window film 11. This facilitates tearing open the container wall along tear lines 25, 26, which are predetermined by corresponding edges of the window film 11.

Such a tear-open handle 27 is carried out, for example, between the interconnected side edges 15, 16 of the blank 9 on the outside of the container 1.

Claims

EXPECTATIONS

1. container (1) for receiving a food with at least one paper layer (3) and a further layer (4) having container wall (5), which container (1) at its upper end (6) has a container opening (7) and is closed at its lower end (8) opposite the container opening, at least the container wall (5) being formed from a two-dimensional blank (9) which is connected to itself to form a continuous container wall, and wherein in the container wall (5) at least one viewing window (10) is formed, which is closed by a transparent or translucent window film (11), characterized in that the container wall (5) is at least partially curved in the region of the viewing window (10) and the window film for sealing the viewing window ( 10) is heat sealed with the paper layer (3).

2. Container according to claim 1, characterized in that window film (11) and paper layer (3) are heat-sealed to one another at least in the region of a viewing window edge (12).

3. Container according to claim 1 or 2, characterized in that the further layer (4) is a metal layer, in particular an aluminum layer.

4. Container according to one of the preceding claims, characterized in that the container opening (7) has an opening edge (13) formed by an upper edge (18) of the blank (9).

5. Container according to one of the preceding claims, characterized in that the opening edge (13) is folded, rolled or folded substantially without changing the properties of the container wall (5).

6. Container according to one of the preceding claims, characterized in that further layer (4) and paper layer (3) are connected to one another by an adhesive and in particular are laminated.

7. Container according to one of the preceding claims, characterized in that further layer (4) and paper layer (3) are substantially congruent.

8. Container according to one of the preceding claims, characterized in that the container (1) is substantially rotationally symmetrical.

9. Container according to one of the preceding claims, characterized in that the window film (11) is substantially geometrically similar to the viewing window (10).

10. Container according to one of the preceding claims, characterized in that the window film (11) is sealingly assigned to a plurality of viewing windows (10).

11. Container according to one of the preceding claims, characterized in that the window film (11) is heat-sealed essentially on the entire inside (14) of the paper layer (3).

12. Container according to one of the preceding claims, characterized in that the window film (11) made of polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), polyamide (PA), polyethylene (PET) or one other, in particular thermoplastic plastic is formed.

13. Container according to one of the preceding claims, characterized in that the connection of the blank (9) with itself is made by heat and / or pressure and / or using an adhesive.

14. Container according to one of the preceding claims, characterized in that the blank (9) is connected to itself along side edges (15, 16) arranged in abutting manner.

15. Container according to one of the preceding claims, characterized in that the blank (9) is connected to itself along an overlap region (17) extending in particular in the longitudinal direction of the container (23).

16. Container according to one of the preceding claims, characterized in that the edges (15, 16, 18, 19) of the blank (9) are fluid-tight.

17. Container according to one of the preceding claims, characterized in that the metal layer (4) has an imprint on its outside (20).

18. Container according to one of the preceding claims, characterized in that the print has a three-dimensional effect.

19. Container according to one of the preceding claims, characterized in that the print is a hologram.

20. Container according to one of the preceding claims, characterized in that a print is applied to a viewing window (10).

21. Container according to one of the preceding claims, characterized in that the window print is only visible after at least partial removal of the food.

22. Container according to one of the preceding claims, characterized in that the closed end (8) of the container (1) has a bottom insert (21) which and optionally a cover (22) closing the container opening (7) in particular from an at least partially transparent material are formed.

23. Container according to one of the preceding claims, characterized in that the container (1) is stackable and unstackable.

24. Container according to one of the preceding claims, characterized in that the viewing window (10) extends substantially in the longitudinal direction of the container (23).

25. Container according to one of the preceding claims, characterized in that the viewing window (10) is angular, in particular quadrangular, oval, essentially round, essentially rhombic, trapezoidal or the like.

26. Container according to one of the preceding claims, characterized in that at least two viewing windows (10) are arranged side by side in the container circumferential direction (24) and / or one above the other in the container longitudinal direction (23).

27. Container according to one of the preceding claims, characterized in that the viewing window (10) extends substantially spirally around the longitudinal direction of the container (23).

28. Container according to one of the preceding claims, characterized in that the container (1) has at least one tear line (25, 26).

29. Container according to one of the preceding claims, characterized in that the tear line (25, 26) is associated with a tear handle (27).

30. Container according to one of the preceding claims, characterized in that the tear line (25, 26) extends essentially along an upper and / or lower edge of the viewing window (10).

31. Container according to one of the preceding claims, characterized in that the tear-open handle (27) on the window film (11) is arranged and optionally formed by this.

32. Container according to one of the preceding claims, characterized in that the tear line runs along at least one edge of the window film (11).

33. Container according to one of the preceding claims, characterized in that the further layer (4) is an in particular fluid-tight plastic layer.

34. blank (9) for producing a container (1) according to any one of the preceding claims.

35. Blank according to claim 34, characterized in that the viewing window (10) is cut or punched out before the window film (11) is attached.

36. Blank according to claim 34, characterized in that the viewing window (10) after application of the window film (11) is produced by cutting or punching out only the paper and metal layer (3, 4).