BLANK, AND CUFF-SHAPED OUTER PART FORMED FROM THE BLANK FOR ENCASING A CUP-SHAPED INNER CONTAINER, AND COMBI-PACKAGING CONTAINER

Description

The invention relates to a blank and to a sleeve-shaped outer part formed from a blank for encasing a cup-shaped inner container and to a combination packaging container formed from an inner container and the outer part. The invention relates also to a method of manufacturing the combination packaging container and a method of separating the combination packaging container into its inner container and the outer part by separating the overlap area of the outer part.

Due to ever stricter environmental requirements, it is becoming increasingly important to separate the different materials according to type when recycling products in order to improve the recycling quality. In particular, the separation of the different materials according to type should be made as simple as possible so that any omissions or errors made by a person during the recycling process can be compensated for as far as possible.

WO 2020/245148 A1 from the same applicant describes a sleeve-shaped outer part formed from a blank of the generic type, the blank being wound to form a casing and its end portions being connected to one another in an overlap region. The sleeve-shaped outer part forms a combination packaging container together with a cup-shaped inner container. A predetermined separation area comprises an actuating means with a seizing portion for separating separation portions located on both sides. Viewed in the circumferential direction, the seizing portion is offset laterally with respect to the aligned separating portions and an imaginary straight connecting line between them. Between each end of the seizing portion and a respective end of the separating portions, a separate predetermined separating portion is formed in the casing of the outer part. With a combination packaging container configured in this way, it is necessary to actively separate the predetermined separation area in order to separate the sleeve-shaped outer part from the cup-shaped inner container and recycle them separately.

The object of the present invention was to overcome the disadvantages of the prior art and to provide a sleeve-shaped outer part and a combination packaging container comprising a cup-shaped inner container with a sleeve-shaped outer part surrounding it, in which the sleeve-shaped outer part can be easily removed from the inner container for recycling purposes.

This object is achieved by a device and a method according to the claims.

According to the invention, a blank is provided for an outer part for encasing a cup-shaped inner container, wherein the inner container has a container casing which has an open end and an end closed by a bottom,

• • wherein the blank has a first end portion and a second end portion, wherein an adhesive layer consisting of an adhesive is arranged on the first end portion and/or on the second end portion, wherein the blank can be wound to form a casing and the first end portion and the second end portion can be coupled to one another in an overlap region by means of the adhesive layer of the adhesive,
  • wherein the blank further has a first front side and a second front side and the two front sides are spaced apart, wherein the adhesive layer has a longitudinal extension in a direction starting from the first front side to the second front side.

The adhesive layer is dimensioned in such a way that the first end portion and the second end portion in the overlap area at the adhesive layer can be detached from each other again from the coupled state.

The blank according to the invention has the surprising advantage that a detachable adhesive layer can be used to improve the separation of the blank and a cup-shaped inner container wrapped with the blank.

According to the invention, an outer part is provided for encasing a cup-shaped inner container, the inner container having a container casing which has an open end and an end closed by a bottom, the outer part being formed from a blank, which blank has a first end portion and a second end portion, the blank being wound to form a casing and the first end portion and the second end portion being coupled to one another in an overlap region by means consisting of an adhesive layer consisting of an adhesive.

Furthermore, the outer part has a first front side and a second front side and the two front sides are spaced apart, wherein the adhesive layer has a longitudinal extension in a direction starting from the first front side to the second front side.

The adhesive layer is arranged in the overlap area between the first end portion and the second end portion and contacts the first end portion and the second end portion. The adhesive layer is dimensioned in such a way that the first end portion and the second end portion in the overlap area at the adhesive layer can be detached from each other.

The outer part according to the invention has the surprising advantage that a detachable adhesive layer can be used to improve the separation of the outer part and a cup-shaped inner container wrapped with the outer part.

Furthermore, it may be provided that a support layer of the blank is formed from a cellulose material, wherein the adhesive layer abuts directly against the support layer in the overlap area both at the first end portion and at the second end portion, wherein the cellulose material of the support layer has a tensile strength and wherein the adhesive of the adhesive layer has a peel strength,

• • wherein the peel strength of the adhesive is greater than the tensile strength of the cellulose material of the support layer. This has the advantage that when the bonded outer part is separated during the recycling process, the cellulose material can be torn out at a certain separating force and the adhesive bond can thus be released. The actual separating force depends on the tensile strength of the support layer and the adhesive contact surface. This means that a desired separating force can be set by varying the adhesive contact surface and knowing the tensile strength of the support layer. The desired separating force is selected in such a way that no undesired separation of the outer part occurs during transportation or use of the combination packaging container and that, at the same time, mechanical deformation of the combination packaging container takes place during recycling of the combination packaging container to separate the outer part and thus separate the outer part from the cup-shaped inner container. The dimensioning of the adhesive contact surface and thus the dimensioning of the adhesive layer may be based on knowledge of the tensile strength of the cellulose material of the support layer. Different cellulose materials may therefore require a different dimensioning of the adhesive contact surface in order to achieve the desired separating force.

Furthermore, it may be provided that the support layer has a tensile strength of between 2 N/mm² and 20 N/mm², in particular between 5 N/mm² and 15 N/mm², preferably between 8 N/mm² and 12 N/mm².

In addition, it may be provided that the adhesive layer has at least a first adhesive segment and a second adhesive segment, which are interrupted from one another by a first interruption, the first adhesive segment having a first adhesive segment length. This has the advantage that the required adhesive contact surface per 100 mm of longitudinal extension can be adjusted more easily by interrupting the adhesive application without having to change the adhesive layer width and thus vary the adhesive nozzle.

The terms “first adhesive segment” and “second adhesive segment” refer to two adhesive segments arranged adjacent to each other. This does not necessarily mean that the first adhesive segment is the outermost adhesive segment.

The provision of interruptions also has the advantage that the amount of adhesive used can be reduced.

In particular, it may be provided that the first adhesive segment and the second adhesive segment have the same shape. Furthermore, it may be provided that, in addition to the first adhesive segment and the second adhesive segment, further adhesive segments are configured, the individual adhesive segments being arranged at a regular distance from one another. In other words, the distances between the individual adhesive segments may be the same.

Another advantageous embodiment is one in which the first adhesive segment and the second adhesive segment are configured in the form of dots, with the first adhesive segment having a first adhesive segment diameter and the second adhesive segment having a second adhesive segment diameter. The advantage of this is that it is easy to apply the adhesive in dots. In addition, the adhesive contact surface can be easily adjusted for an adhesive application in dots.

In particular, it may be provided that the first adhesive segment diameter and the second adhesive segment diameter have the same size.

According to an advancement, it is conceivable that the first adhesive segment diameter and the second adhesive segment diameter are between 0.5 mm and 15 mm, in particular between 1.5 mm and 9 mm, preferably between 2.5 mm and 6 mm. Especially with a standard paper quality of the cellulose material of the support layer, the desired effect of separating the outer part only in recycling can surprisingly be achieved with such a selected adhesive segment diameter.

Furthermore, it may be expedient if the first interruption has a first interruption distance, wherein the first interruption distance is between 100% and 1000%, in particular between 200% and 700%, preferably between 250% and 400% of the first adhesive segment diameter. Especially with a standard available paper quality of the cellulose material of the support layer, the desired effect of separating the outer part only in recycling can surprisingly be achieved with such a selected interruption distance.

In an alternative embodiment, it may be provided that the first adhesive segment length is between 0.5 mm and 15 mm, in particular between 1 mm and 9 mm, preferably between 1.5 mm and 3 mm.

Furthermore, it may be provided that the first interruption has a first interruption distance, wherein the first interruption distance is between 1 mm and 25 mm, in particular between 8 mm and 20 mm, preferably between 13 mm and 18 mm.

Furthermore, it may be provided that the first adhesive segment length is between 0.5 mm and 15 mm, in particular between 1 mm and 9 mm, preferably between 1.5 mm and 3 mm, and at the same time the first interruption distance is between 1 mm and 25 mm, in particular between 8 mm and 20 mm, preferably between 13 mm and 18 mm. Surprisingly, especially with such dimensions, it has been shown that, on the one hand, sufficient durability and, at the same time, good releasability of the first end portion and the second end portion from each other can be achieved.

In addition, it may be provided that the adhesive layer has an adhesive contact surface, the adhesive contact surface being between 20 mm² and 500 mm² per 100 mm in the longitudinal extension, in particular between 50 mm² and 200 mm² per 100 mm in the longitudinal extension, preferably between 80 mm² and 150 mm² per 100 mm in the longitudinal extension. Especially with a standard paper quality of the cellulose material of the support layer, the desired effect of separating the outer part only in recycling can surprisingly be achieved with such a selected adhesive contact surface.

Furthermore, it may be provided that a glue layer is configured in addition to the adhesive layer, wherein the adhesive layer comprises a hot-melt adhesive and wherein the glue layer comprises a cold glue. The combination consisting of an adhesive layer with a hot-melt adhesive and a glue layer with a cold glue has the advantage that the first end portion and the second end portion can be fixed to each other quickly when the adhesive joint is produced using the hot-melt adhesive, so that the production time can be reduced. The cold glue can be used to achieve a temperature-resistant connection between the first end portion and the second end portion, which does not detach even at elevated temperatures. At these elevated temperatures, the hot-melt adhesive may detach.

In an alternative embodiment, it may also be provided that the adhesive layer comprises a cold glue and that the glue layer comprises a hot-melt adhesive.

Furthermore, it may be provided that the adhesive layer and the glue layer are arranged laterally offset to one another with respect to the longitudinal extension. This has the advantage that the adhesive layer and the glue layer can be applied easily.

In addition, it may be provided that the adhesive layer has at least a first adhesive segment and a second adhesive segment, as seen over the longitudinal extension, which are interrupted from one another by a first interruption, wherein the first adhesive segment has a first adhesive segment length, and that the adhesive layer has at least a first adhesive segment and a second adhesive segment, as seen over the longitudinal extension, which are interrupted from one another by a first adhesive layer interruption, wherein the first adhesive segment has a first adhesive segment length. Surprisingly, especially with such dimensions, it has been shown that, on the one hand, sufficient durability and, at the same time, good releasability of the first end portion and the second end portion from each other can be achieved.

Furthermore, it may be provided that the that the first adhesive segment length is between 0.5 mm and 15 mm, in particular between 1 mm and 9 mm, preferably between 1.5 mm and 3 mm, and at the same time the first interruption distance is between 1 mm and 25 mm, in particular between 8 mm and 20 mm, preferably between 13 mm and 18 mm, and in that the first glue segment length is between 0.5 mm and 20 mm, in particular between 1 mm and 15 mm, preferably between 4 mm and 9 mm. Surprisingly, especially with such dimensions, it has been shown that, on the one hand, sufficient durability and, at the same time, good releasability of the first end portion and the second end portion from each other can be achieved.

In particular, it may be provided that one glue segment is arranged only in the edge area.

In addition, it may be provided that an adhesive layer width is between 0.3 mm and 3 mm, in particular between 0.5 mm and 2 mm, preferably between 0.9 mm and 1.5 mm.

Furthermore, it may be provided that the glue layer width is between 0.3 mm and 3 mm, in particular between 0.5 mm and 2 mm, preferably between 0.9 mm and 1.5 mm.

In a first exemplary embodiment, it may be provided that the adhesive layer is arranged between the glue layer and the first longitudinal edge.

In an alternative exemplary embodiment, it may also be provided that the glue layer is arranged between the adhesive layer and the first longitudinal edge.

According to the invention, a combination packaging container is configured. The combination packaging container includes:

• • a cup-shaped inner container, the inner container having a container casing which has an open end and an end closed by a bottom;
  • an outer part which encases the inner container,
  • the outer part being formed from a blank, which blank has a first end portion and a second end portion, the blank being wound to form a casing and the first end portion and the second end portion being coupled to one another in an overlap region by means consisting of an adhesive layer consisting of an adhesive,
  • the outer part further having a first front side and a second front side and the two front sides being spaced apart, the first front side facing the bottom and the second front side facing the open end of the inner container, the adhesive layer having a longitudinal extension in a direction starting from the first front side to the second front side.

The adhesive layer is dimensioned in such a way that the first end portion and the second end portion in the overlap area at the adhesive layer can be detached from each other.

The combination packaging container according to the invention has the surprising advantage that a detachable adhesive layer can be used to improve the separation of the outer part and the inner container wrapped with the outer part when the container is disposed of. In particular, the measures according to the invention may be used to achieve an automated separation of the outer part from the inner container if the combination packaging container is excessively deformed when empty, as is the case, for example, when transporting waste. This results in a complete separation of the outer part from the inner container. This means that the recyclability of the combination packaging container can also be achieved if the end user does not consciously separate the outer part from the inner container in order to dispose of them separately. The structure of the combination packaging container according to the invention makes it possible to prevent undesired detachment of the outer part from the inner container when the combination packaging container is full and to improve separability when the container is disposed of.

According to a particular embodiment, it is conceivable that the adhesive layer is configured in such a way that when the outer part is separated from the inner container, the first end portion of the outer part and the second end portion of the outer part are detached from each other in the overlap area at the adhesive layer, parts of a support layer of the blank being torn out at the first end portion and/or at the second end portion and remaining adhered to the adhesive layer. This has the advantage that the desired separating force can be predicted or set relatively accurately with this type of separation mechanism.

According to the invention, a method for producing a combination packaging container is provided. The method comprises the following method steps:

• • providing a cup-shaped inner container, wherein the inner container has a container casing which has an open end and an end closed by a bottom;
  • molding an outer part for encasing the inner container,
  • wherein the outer part is formed from a blank, which blank has a first end portion and a second end portion, wherein the blank is wound to form a casing and the first end portion and the second end portion are coupled together in an overlap area by means consisting of an adhesive layer consisting of an adhesive,
  • wherein the outer part further has a first front side and a second front side and the two front sides are spaced to from one another, wherein the adhesive layer has a longitudinal extension in a direction starting from the first front side to the second front side,
  • axially pushing the outer part onto the inner container, with the first front side facing the bottom and the second front side facing the open end of the inner container, or molding the outer part directly by wrapping it around the inner container.

The adhesive layer is configured in such a way that the first end portion and the second end portion in the overlap area at the adhesive layer can be detached from each other.

In a first embodiment, it may be provided that the molding of the outer part and bonding of the first end portion and the second end portion in an overlap region by means consisting of an adhesive layer is carried out in a separate method step, and the outer part thus molded is only pushed onto the inner container by axial displacement in a further method step.

In an alternative configuration, it is also conceivable that the outer part is wound or molded directly onto the inner container. The inner container may be attached to a winding mandrel.

The method according to the invention has the surprising advantage that a detachable adhesive layer can be used to improve the separation of the outer part and the inner container wrapped with the outer part when the container is disposed of. In particular, the measures according to the invention may be used to achieve an automated separation of the outer part from the inner container if the combination packaging container is excessively deformed when empty, as is the case, for example, when transporting waste. This results in a complete separation of the outer part from the inner container. This means that the recyclability of the packaging container can also be achieved if the end user does not consciously separate the outer part from the inner container in order to dispose of them separately. The structure of the combination packaging container according to the invention makes it possible to prevent undesired detachment of the outer part from the inner container when the combination packaging container is full and to improve separability when the container is disposed of.

In particular, it may be advantageous if a hot-melt adhesive is used to apply the adhesive layer to the blank, which is applied to an outer surface of the blank in the area of the first end portion before the outer part is molded. A hot-melt adhesive of this type can be applied to the blank in a simplified manner and also offers improved release properties. The adhesive layer may be formed from a hot-melt adhesive, for example a thermoplastic hot-melt adhesive. The advantage of a hot melt adhesive is that it hardens quickly after application and therefore when it cools down, so that a short cycle time can be achieved.

A glue layer may be configured in addition to the adhesive layer. The glue layer may be a layer consisting of cold glue. In particular, the glue layer may be formed from a white glue. Such white glue may contain polyvinyl acetate as a binder. In particular, this may be a thermoplastic dispersion adhesive. The advantage of this type of cold glue is that it can be heat-resistant, so that no undesirable detachment occurs during transportation or hot filling. Furthermore, it may be provided that an adhesive segment is assigned to each glue segment, in particular that the glue segment is arranged adjacent to the adhesive segment.

In an alternative embodiment, it may be provided that a glue segment and an adhesive segment alternate.

Furthermore, it may be provided that the adhesive layer is applied to the blank on an inner surface of the blank in the area of the second end portion before the outer part is molded.

In particular, it may be provided that the end portions of the blank are configured in such a way that the adhesive layer abuts directly against the support layer both at the first end portion and at the second end portion.

It may also be provided that the hot-melt adhesive is originally in granular form and is melted by heating, in particular to a temperature between 130° C. and 160° C., and pressed through a nozzle for application to the outer surface of the blank. The advantage of this measure is that a sufficient bond between the hot-melt adhesive and the blank can be achieved.

In a first embodiment, it may be provided that a specially shaped wide nozzle is configured for applying the adhesive layer, by means of which the adhesive layer is applied as a whole. The nozzle may extend over the entire length of the adhesive layer. The nozzle may also have recesses through which the individual adhesive segments can be applied to the blank. The advantage of such a configuration is that the adhesive layer can be applied quickly.

In an alternative embodiment, it may be provided that the adhesive layer is applied by means of a nozzle which has a width corresponding to a width of the adhesive layer, wherein the nozzle is moved in the longitudinal direction of the adhesive layer relative to the blank and the adhesive is applied intermittently.

In other words, the adhesive layer can be applied to the blank by intermittent application. This has the advantage that the required adhesive contact surface per 100 mm of longitudinal extension can be adjusted more easily by interrupting the adhesive application without having to change the adhesive layer width and thus vary the adhesive nozzle.

Furthermore, it may be provided that the adhesive layer is applied in such a way that in the joined state of the first end portion and the second end portion in the overlap area, a pre-calculated adhesive contact surface per 100 mm of longitudinal extension is achieved, wherein the pre-calculated adhesive contact surface per 100 mm of longitudinal extension is calculated as a function of the tensile strength of a cellulose material of a support layer of the blank, so that when the combination packaging container is recycled, the first end portion and the second end portion in the overlap area at the adhesive layer are detached from one another when a desired separating force is reached. This has the advantage that the desired separating force can be set with a surprisingly high accuracy.

A method for the separation of a combination packaging container with a cup-shaped inner container, the inner container having a container casing which has an open end and an end closed by a bottom and an outer part which encases the inner container, the outer part being formed from a blank, which blank has a first end portion and a second end portion, the blank being wound to form a casing and the first end portion and the second end portion being coupled to one another in an overlap region by means consisting of an adhesive layer consisting of an adhesive, the outer part further having a first front side and a second front side and the two front sides being spaced apart, the first front side facing the bottom and the second front side facing the open end of the inner container, the adhesive layer having a longitudinal extension in a direction starting from the first front side to the second front side. To separate the outer part from the inner container, the first end portion of the outer part and the second end portion of the outer part are detached from each other in the overlap area at the adhesive layer, parts of a support layer of the blank being torn out at the first end portion and/or at the second end portion and remaining adhered to the adhesive layer.

According to an advancement, it is conceivable that in order to separate the outer part from the inner container, the first end portion of the outer part and the second end portion of the outer part are detached from each other in the overlap area at the adhesive layer by applying a compressive force (-F-) directed towards the combination packaging container and thereby spatially deforming the outer part and the container casing of the combination packaging container, wherein the spatial deformation of the outer part and the container casing in the area of the adhesive layer introduces a separating force which leads to the adhesive layer being detached from the first end portion or to the adhesive layer being detached from the second end portion by parts of the support layer of the blank being torn out and remaining adhered to the adhesive layer. This means that the separation of the combination packaging container can be achieved, for example, by the ambient conditions during the transportation of the waste. Particularly during transportation in a refuse truck, large forces and therefore large deformations act on the combination packaging container, which can cause the outer part to separate from the inner container.

Furthermore, it may be expedient if the spatial deformation of the outer part includes an axial deformation that is greater than 1.5 cm from an undeformed state of use and/or a radial deformation that is greater than 2 cm from an undeformed state of use. This means that the separation of the combination packaging container can be achieved, for example, by the ambient conditions during the transportation of the waste. Particularly during transportation in a refuse truck, large forces and therefore large deformations act on the combination packaging container, which can cause the outer part to separate from the inner container.

For a better understanding of the invention, it is explained in more detail with the aid of the following figures.

The figures show in a very simplified, schematic representation:

FIG. 1 a combination packaging container with an inner container and an outer part, in view, partially cut;

FIG. 2 a detailed view of a detail II from FIG. 1;

FIG. 3 an illustration of a first exemplary embodiment of a blank;

FIG. 4 an illustration of a second exemplary embodiment of a blank;

FIG. 5 a sectional view of the outer part according to the section line V-V from FIG. 1;

FIG. 6 a first exemplary embodiment of a nozzle for applying an adhesive layer;

FIG. 7 a second exemplary embodiment of a nozzle for applying an adhesive layer;

FIG. 8 a further exemplary embodiment of a blank with the adhesive layer and a glue layer;

FIG. 9 a further exemplary embodiment of a blank with the adhesive layer and the glue layer in a regular shape;

FIG. 10 a further exemplary embodiment of a blank with the adhesive layer and the glue layer in alternating configuration.

By way of introduction, it should be noted that in the various embodiments described, the same parts are provided with the same reference signs or the same component designations, wherein the disclosures contained in the entire description can be transferred analogously to the same parts with the same reference signs or the same component designations. Moreover, the specifications of location, such as at the top, at the bottom, at the side, chosen in the description refer to the directly described and depicted figure and in case of a change of position, these specifications of location are to be analogously transferred to the new position.

The term “in particular” is understood hereinafter to mean a possible more specific embodiment or more detailed specification of an object or a process step, but does not necessarily have to represent a mandatory, preferred embodiment thereof or a mandatory approach.

As used herein, the terms “comprising”, “has”, “having”, “includes”, “including”, “contains”, “containing” and any variations thereof are intended to cover non-exclusive inclusion.

Another term that can be used is “optional”. This is understood to mean that this method step or this system component is basically available, but may be used depending on the operating conditions, although this does not necessarily have to be the case.

FIG. 1 shows an exemplary embodiment of a combination packaging container 1 exemplifying a plurality of possible different shapes, the combination packaging containers 1 being cup-shaped or tray-shaped. The combination packaging container 1 comprises a cup-shaped or tray-shaped inner container 2 with a bottom 3 and a container casing 4. The inner container 2 also has an open end 5 on the side facing away from the bottom 3. Furthermore, a flange 6 projecting outwards beyond the container casing 4 may be provided in the area of its open end 5. The bottom 3 forms a closed end 7 for the container casing 4.

The inner container 2 is preferably formed by a component manufactured in a deep-drawing process, which can be produced quickly and, above all, in a short cycle time. The deep drawing process is well known and will therefore not be discussed in detail. The deep-drawing process is particularly suitable for producing the inner container 2 from a layer to be formed from a formable material by means of a deep-drawing tool with a wall thickness that is sufficient to ensure tightness during storage, use and disposal. This manufacturing process allows relatively thin wall thicknesses of the inner container 2 to be produced. However, the inner container 2 may also be formed using other manufacturing processes, such as injection molding.

Due to the cup-shaped or tray-shaped design of the inner container 2, a longitudinal axis 8 extends in the axial direction between the open end 5 and the end 7 closed by the bottom 3, which may also represent a central axis if the configuration is symmetrical. In the area of the flange 6, it is conceivable to arrange or connect a sealing plate (not shown in detail). In this case, the flange 6 configures a sealing flange.

In the axial direction and thus in the direction of the longitudinal axis 8, the inner container 2 has a container height 9 between its open end 5, in particular the flange 6, and the bottom 3, whereby the volumetric capacity of the inner container 2 is determined as a function of the cross-sectional dimensions. The container height 9 in combination with the cross-sectional dimensions thus defines a receiving space for the inner container 2.

The container casing 4 is understood to be that portion of the inner container 2 which extends between the open end 5, in particular the flange 6, and the bottom 3 in a predominantly axial direction. The inner container 2 with its container casing 4 is preferably configured such that it tapers conically from the open end 5 to the bottom 3.

Furthermore, the container casing 4 of the inner container 2 may have a undercut 10 in its circumferential portion adjacent to the bottom 3. The undercut 10 is also part of the container casing 4, but is offset inwards with respect to an imaginary, straight connecting line between the flange 6 and the bottom 3 when viewed in axial section. The undercut 10 itself has at least two undercut wall portions not designated in more detail, the two undercut wall portions having a different inclination or direction with respect to the longitudinal axis 8 than the rest of the container casing 4 when viewed in axial section. In this case, the undercut 10 is arranged between the flange 6 and the bottom 3 inwards and thus offset in the direction of the receiving space compared to the straight arrangement of the container casing 4 seen in axial section.

Viewed in axial section, the first undercut wall portion immediately adjacent to the bottom 3 is arranged or configured to extend predominantly in the direction of the container height 9 towards the open end 5. The further undercut wall portion extends in a predominantly vertical direction with respect to the container height 9, starting from the end of the first undercut wall portion facing away from the bottom 3 towards the container casing 4. In the present exemplary embodiment, the further undercut wall portion configures a stacking shoulder. This stacking shoulder achieves that a similar combination packaging container 1 can be supported on it with its bottom 3, in particular the edge transition portion between the bottom 3 and the container casing 4.

Furthermore, the inner container 2 may have a shoulder 11 or a bead projecting on the side facing away from the longitudinal axis 8 in the immediate transition area between the bottom 3 and the container casing 4, in particular between the bottom 3 and the undercut 10. The shoulder 11 or the bead may be circumferential. It is also conceivable that the shoulder 11 or the bead are configured in portions.

The combination packaging container 1 also comprises an outer part 12, which is sleeve-shaped or casing-shaped and surrounds the inner container 2 in the area of its container casing 4, at least in portions or areas.

The shoulder 11 described above may be used, for example, to axially fix the sleeve-shaped outer part 12 to the inner container 2. In this case, the sleeve-shaped outer part 12 is supported with its first end 19 facing the bottom 3 of the inner container 2 on this shoulder 11 configured in the transition area. The shoulder 11 may therefore also be described as a latching means for holding the outer part 12 at the inner container 2. The front side 19 forms a front edge in its longitudinal extension, which in the joined position defines a support area at least in portions and is supported in abutment against the shoulder. To simplify the axial joining of the outer part 12 to the inner container 2, the shoulder 11 may be tapered at least in portions from the open end 5 to the closed end 7.

Furthermore, the sleeve-shaped outer part 12 comprises a second front side 20, which in turn faces the open end 5 or the flange 6.

The sleeve-shaped outer part 12 is preferably formed from a cellulose material, such as a cardboard material, with sufficient strength to absorb and transmit compressive forces, particularly axial forces, and is wound from a flat blank 13 to form a casing. The blank 13 is usually printed in its undeformed flat condition and may also be provided with an additional coating. In particular, it is of course also conceivable that the blank 13 is made up of several parts. A cellulose material is usually used as the material for the blank 13, although this may also be recycled cardboard or thick paper. If a layer or ply of the outer part 12 is formed from a recycled material, an additional layer of a higher quality paper may be arranged on at least one of the surfaces or connected to it. This additional layer is used for flawless printing to produce decorations, lettering and product information.

The sleeve-like or casing-like outer part 12 leads to an additional reinforcement or stiffening effect of the inner container 2 and thus of the entire combination packaging container 1.

This ensures high strength and good thermal insulation on the one hand and optimum light protection for the contents of the packaging container on the other hand.

In particular, it may also be provided that the cardboard is additionally coated or sealed with a water-repellent material in the area of the cut edges. This is particularly advantageous if the combination packaging containers 1 are exposed to increased moisture ingress. The coating of the cardboard used for the outer part 12 with a water-repellent layer prevents the cardboard from swelling in a damp environment and ultimately from detaching from the container casing 4 of the combination packaging container 1.

The sleeve-shaped outer part 12 is wound from the mostly flat blank 13 to form a casing. The blank 13 itself is shown in detail in FIG. 3.

In particular, it may be provided that the flat blank 13 has a first end portion 14 and a second end portion 15. By winding the blank, the end portions 14, 15 can be joined together in a overlap area 16, which is shown in a simplified way. This may be achieved by a so-called overlap seam, by means of which the first end portion 14 and the second end portion 15 adhere to each other, for example by means consisting of an adhesive layer 22. The first end portion 14 of the blank 13 ends with a first longitudinal edge 17 and the second end portion 15 in turn ends with a second longitudinal edge 18. In the overlap area 16, the two longitudinal edges 17, 18 run approximately parallel to each other, wherein the overlap area 16 is formed with an overlap width between them when viewed in the circumferential direction. In particular, it may be provided that in the wound state of the outer part 12, the second end portion 15 is folded over the first end portion 14 on the outside.

In particular, it may be provided that the adhesive layer 22 is applied to the blank 13 in the area of the first end portion 14 or the second end portion 15. The adhesive may be in granular form and melted. Once melted, the adhesive can then be sprayed onto one of the end portions 14, 15 using a nozzle.

The sleeve-shaped outer part 12 can be wound with the aid of a winding mandrel.

The outer part 12 is also provided with the first front side 19 and the second front side 20, with the two front sides 19, 20 being spaced apart and defining an construction height 21 of the casing when erected. The previously described longitudinal axis 8 may also define the common longitudinal axis for the outer part 12, in particular when the outer part 12 is in its mounted position on the inner container 2. In most cases, the construction height 21 of the casing is slightly smaller than the container height 9 of the inner container 2 in the same spatial direction—namely in the direction of the longitudinal axis 8.

As shown in FIG. 1 in the lower left-hand corner area of the combination packaging container 1 shown in section and in the enlarged representation in FIG. 2, it may be provided that an additional support device 23 is provided or formed in the area or in the portion of the first front side 19 of the blank 13 or of the outer part 12 formed therefrom by forming the material of the blank 13 alone. The additional support device 23 serves or is configured to ensure that the outer part 12 is or is being supported even more securely on the shoulder 11 of the inner container 2 in the axial direction until it is detached from the latter. The additional support device 23 is furthermore configured in such a way that a clear internal dimension of the finished outer part 12 is smaller in relation to the undeformed configuration. The bottom-side end 19 of the outer part 12 already forms or defines the support area interacting with the shoulder 11, which is further improved, in particular enlarged, and made safer by the provision or configuration of the additional support device 23.

In this first exemplary embodiment shown here, the additional support device 23 comprises at least one support element 24, but preferably several support elements 24 arranged spaced apart along the first front side 19, which are distributed over the circumference of the sleeve-shaped outer part 12. The individual support elements 24 may be formed into the material of the blank 13 by forming or embossing and are thus each an integral part of the blank 13. The support elements 24 are formed starting from an outer surface 25 of the outer part 12 in the direction of an inner surface 26 and are thus configured. As a result, these protrude in a radial direction beyond the undeformed inner surface 26 in the direction of the longitudinal axis 8. The protrusion may have a value that lies in a value range whose lower limit is 0.05 cm, in particular 0.1 cm, and whose upper limit is 0.5 mm, in particular 0.2 mm.

In an alternative embodiment, not shown, it may be provided that the outer part 12 is folded inwards in the area of the first front side 19 or has a fold. A function of the support device 23 may thus be achieved by this fold.

In FIG. 3, the blank 13 for forming the outer part 12 described above in FIGS. 1 to 2 is shown in its undeformed, flat position, with the same reference signs or component designations being used for identical parts as in the preceding FIGS. 1 to 2. In order to avoid unnecessary repetition, reference is made to the detailed description in the preceding FIGS. 1 to 2.

As may be seen from FIG. 3, it may be provided that the adhesive layer 22 is applied to the outer surface 25 of the blank 13 in the area of the first end portion 14. The adhesive layer 22 may be applied shortly before the blank 13 is formed into the outer part 12.

As may also be seen from FIG. 3, the adhesive layer 22 may be configured in segments. In particular, it may be provided that a first adhesive segment 27 and a second adhesive segment 28 are configured, which are separated from each other by a first interruption 29. Further adhesive segments 30 may also be configured, which are also arranged spaced apart along a longitudinal extension 31. In particular, it may be provided that the individual adhesive segments 27, 28, 30 are arranged in a regular pattern.

The adhesive layer 22 may run parallel to the first longitudinal edge 17. In particular, the adhesive layer 22 may have a longitudinal extension 31 in a direction starting from the first front side 19 to the second front side 20.

It is also conceivable that the adhesive layer 22 has a length 32. The length 32 of the adhesive layer 22 may extend from the first adhesive segment 27 to the last of the adhesive segments 30.

Furthermore, it may be provided that the adhesive layer 22 has an adhesive layer width 33.

In the present exemplary embodiment according to FIG. 3, the individual adhesive segments 27, 28, 30 may have an elongated shape. The individual adhesive segments 27, 28, 30 may have a roughly rectangular shape when viewed from above. Due to the application of the adhesive segments 27, 28, 30, the shape can be rounded at the corners when viewed from above.

Furthermore, it may be provided that the first adhesive segment 27 has an adhesive segment length 46. An adhesive segment length of the further adhesive segments 28, 30 may be the same size as the adhesive segment length 46 of the first adhesive segment 27.

The length 32 and the adhesive layer width 33 of the adhesive layer 22 may thus be clearly defined.

Furthermore, the blank 13 may have a longitudinal edge length 34 in the area of the first end portion 14, in particular at the first longitudinal edge 17. When considering the longitudinal edge length 34, any shortening of the actual longitudinal edge length due to rounding or due to a chamfer is not taken into account here. The entire length of the blank 13 between the first front side 19 and the second front side 20 is therefore considered to be the longitudinal edge length 34.

As may also be seen from FIG. 3, it may be provided that the adhesive layer 22 is arranged at a distance 35 from the second longitudinal edge 18 in the wound state. The position of the second longitudinal edge 18 in the wound state is schematically indicated by the stroke-dotted line in the illustration according to FIG. 3.

The adhesive layer 22 contacts the blank 13 at an adhesive contact surface 36.

Furthermore, it may be provided that the first adhesive segment 27 and the second adhesive segment 28 are arranged at a first interruption distance 37 from one another.

FIG. 4 shows a further and possibly independent embodiment of the blank 13 or the adhesive layer 22 applied to the blank 13, again using the same reference signs or component designations for identical parts as in the preceding FIGS. 1 to 3. In order to avoid unnecessary repetition, reference is made to the detailed description in the preceding FIGS. 1 to 3.

As may be seen from FIG. 4, it may be provided that the first adhesive segment 27 and the second adhesive segment 28 as well as further adhesive segments 30 are configured in the form of dots. The first adhesive segment 27 may have a first adhesive segment diameter 38. The second adhesive segment 28 may have a second adhesive segment diameter 39. The first adhesive segment diameter 38 and the second adhesive segment diameter 39 may have the same size. In particular, it may be provided that the width 33 of the adhesive layer 22 is defined by two tangents adjacent to the individual adhesive segments 27, 28, 30. In other words, the adhesive layer width 33 of the adhesive layer 22 may be equal to the adhesive segment diameters 38, 39.

FIG. 5 shows a sectional view of the outer part 12 along the sectional line V-V in FIG. 1, again using the same reference signs or component designations for the same parts as in the preceding FIGS. 1 to 4. In order to avoid unnecessary repetition, reference is made to the detailed description in the preceding FIGS. 1 to 4. For clarity reason, the inner container 2 is not shown in FIG. 5, only the outer part 12.

As shown in FIG. 5, the blank 13 may have a layered structure. In particular, it may be provided that a support layer 40 is configured, which can be made of a cellulose material, such as a cardboard material. A printing layer 41 may be applied to the support layer 40, which is used to visually display information on the blank 13. Furthermore, a sealing layer 42 may be configured, which covers the printing layer 41. In particular, it may be provided that the outer surface 25 is configured on the sealing layer 42. It may also be provided that the inner surface 26 is configured on the support layer 40.

As may also be seen from FIG. 5, it may be provided that the printing layer 41 and the sealing layer 42 are recessed in a recess at the first end portion 14. In particular, this makes it possible to achieve that the adhesive layer 22 abuts directly against or is applied to the support layer 40 both in the first end portion 14 and in the second end portion 15.

Furthermore, it may be provided that the recess at which the printing layer 41 and the sealing layer 42 are recessed is dimensioned such that it is smaller than the overlap area 16. Thus, a print or graphic display that appears uninterrupted from the outside can be achieved. In the view according to FIG. 5, for the sake of simplicity or for better illustration, the recess at which the printing layer 41 and the sealing layer 42 are recessed is shown larger than the overlap area 16.

Separating, disposing of and subsequent recycling the different materials poses a major challenge. The inner container 2 is usually made of a plastic or a degradable material that can be formed in a thermoforming process. The outer part 12 is preferably made of a cellulose material. The blank 13 may also be provided with a printed image on at least one of its flat sides, namely the outer surface 25 and/or the inner surface 26.

Since the separation process of the outer part 12 from the inner container 2 is usually not or only partially carried out by the consumers or users, it may also be provided here that the adhesive layer 22 arranged in the overlap region 16 is configured in such a way that the first end portion 14 and the second end portion 15 in the overlap region 16 can be detached from each other again from the coupled state. This may preferably be achieved by releasing the first end portion 14 and the second end portion 15 from each other in the overlap region 16 at the adhesive layer 22 when a desired separating force is reached. Here, a part adhering to the adhesive layer 22 can be torn out by the adhesive layer 22 either from the support layer 40 of the first end portion 14 or from the support layer 40 of the second end portion 15. In other words, the support layer 40 is loaded beyond its tensile strength.

In particular, it may be provided that the support layer 40 has such a tensile strength or the adhesive contact surface 36 is dimensioned as a function of the tensile strength of the support layer 40 in such a way as to ensure sufficient mutual hold of the two end portions 14, 15 against one another under the usual loads on a filled combination packaging container 1. However, if a compressive force -F- is applied to an empty combination packaging container 1 that is to be separated and the outer part 12 and the container casing 4 of the combination packaging container 1 are spatially deformed, the tensile strength of the support layer 40 may be exceeded and the end portions 14, 15 that are held together become detached from each other, at least in portions. The compressive force -F- can be applied to the combination packaging container 1 in a wide variety of directions and is at least partially converted into a separating force that at least partially separates the overlap area 16.

For example, compression can be carried out in a radial direction and/or also in an axial direction. The entire combination packaging container 1 is spatially deformed. When a compressive force -F- is applied in the axial direction, the outer part 12 and also the container casing 4 bend in the direction of the longitudinal axis 8 and a separation of the overlap area 16 can ensue or be carried out.

By providing or configuring the additional support device 23 in the edge area immediately adjacent to the first front side 19, the sleeve-shaped outer part 12 can be supported even better and more securely without the use or necessity of an additional adhesive on the shoulder 11 of the inner container 2 in the axial direction. The additional adhesive dot between the inner surface 26 of the outer part 12 and the container casing 4, which was previously applied for safety reasons, can therefore be omitted and no longer needs to be provided. Thus, when the overlap area 16 is separated with the adhesive agent used, an undesirable adhesive bond between the outer part 12 and the inner container 2 can be avoided.

This means that the user of the combination packaging container 1 does not need to carry out the separation process and can dispose of the complete combination packaging container 1.

Furthermore, to carry out the separation process by a person, it would still be possible for the combination packaging container to be placed on a support surface either with its closed end or with its open end of the inner container and then the compressive force -F- is exerted on the end facing away from the support surface in the direction of the support surface.

Depending on the arrangement and placement of the combination packaging container, the compressive force can be easily applied to the combination packaging container, e.g. with human force, and introduced into it. The risk of injury can be minimized with the arrangement in which the compressive force is applied to the bottom.

It would also be conceivable to exert the compressive force -F- on the combination packaging container in a parallel orientation with respect to a longitudinal axis extending between the open end and the closed end or in an angular orientation with respect to the longitudinal axis.

This means that the compressive force can easily be deflected, at least to a large extent, into a separating force acting in a predominantly radial direction when a parallel force is introduced, which leads to the outer part bursting open in its overlap area. If the direction of force introduction deviates from this, the spatial deformation can also cause the overlap area to separate.

If the predetermined separation area described above is also provided, the process of separating the combination packaging container 1 into its various components can be carried out as required. This may be done either by one person or in the course of the collection and disposal process.

FIG. 6 shows a first exemplary embodiment of a nozzle 43 for producing the adhesive layer 22.

As may be seen from FIG. 6, it may be provided that the nozzle 43 has several recesses 44 which correspond to the shape of the adhesive segments 27, 28, 30 to be produced. An adhesive layer width 45 of the nozzle 43 may be selected in such a way that it is adapted to the length 32 of the adhesive layer 22.

FIG. 7 shows a further exemplary embodiment of a nozzle 43 for producing the adhesive layer 22.

As may be seen from FIG. 7, it may be provided that the nozzle 43 is provided with a single recess 44, wherein the nozzle 43 is moved in the longitudinal extension 31 of the adhesive layer 22 and adhesive is dispensed at intervals onto the surface of the blank 13.

FIG. 8 shows a detail of a further exemplary embodiment of the blank 13, wherein the same reference symbols or component designations are used for the same parts as in the preceding FIGS. 1 to 7. In order to avoid unnecessary repetition, reference is made to the detailed description in the preceding FIGS. 1 to 7.

In the detail according to FIG. 8, the overlap area 16 is shown enlarged, wherein the remaining components are not shown for the sake of simplicity.

As may be seen from FIG. 8, it may be provided that a glue layer 47 is configured laterally offset to the adhesive layer 22. The glue layer 47 may have a first glue segment 48 and a second glue segment 49. A first glue layer interruption 50 may be configured between the first glue segment 48 and the second glue segment 49. Furthermore, the glue layer 47 may have a glue layer width 51. The first glue segment 48 and the second glue segment 49 may be arranged at a first glue layer interruption distance 52 from each other. Furthermore, it may be provided that the first glue segment 48 has a first glue segment length 53.

In a specific exemplary embodiment, which has very good properties in terms of durability and separability in the case of recycling, the following dimensions are provided: Glue layer width 51=1 mm; glue segment length 53=8 mm; adhesive layer width 33=1 mm; adhesive segment length 46=2 mm; first interruption distance 37=15 mm; the adhesive layer 22 and the glue layer 47 are carried out deferred in relation to each other. It is assumed that the advantageous properties can still be achieved with a dimensional deviation of 20% from the specific exemplary embodiment.

FIG. 9 shows a detail of a further exemplary embodiment of the blank 13, wherein the same reference symbols or component designations are used for the same parts as in the preceding FIGS. 1 to 8. In order to avoid unnecessary repetition, reference is made to the detailed description in the preceding FIGS. 1 to 8.

As may be seen from FIG. 9, it may be provided that the adhesive layer 22 and the glue layer 47 are not laterally offset relative to one another. In particular, it may be provided that the glue segment 48 and the adhesive segment 27 alternate. In such an embodiment, good pre-fixation can be achieved by the adhesive layer 22 and, in the event of heat-induced detachment of the adhesive layer 22, good long-term fixation can be achieved by the glue layer 47, while at the same time achieving good detachment in the event of recycling.

In a specific exemplary embodiment, which has very good properties in terms of durability and separability in the case of recycling, the following dimensions are provided: glue layer width 51=1 mm; glue segment length 53=1 mm; first glue layer interruption 50=15 mm; adhesive layer width 33=1 mm; adhesive segment length 46=1 mm; first interruption distance 37=15 mm; the adhesive layer 22 and the glue layer 47 are carried out deferred in relation to each other. It is assumed that the advantageous properties can still be achieved with a dimensional deviation of 20% from the specific exemplary embodiment.

FIG. 10 shows a detail of a further exemplary embodiment of the blank 13, wherein the same reference symbols or component designations are used for the same parts as in the preceding FIGS. 1 to 9. In order to avoid unnecessary repetition, reference is made to the detailed description in the preceding FIGS. 1 to 9.

As may be seen from FIG. 10, it may be provided that the adhesive layer 22 and the glue layer 47 are laterally offset relative to one another. In particular, it may be provided that an adhesive segment 27 is assigned to each glue segment 48. In such an embodiment, good pre-fixation can be achieved by the adhesive layer 22 and, in the event of heat-induced detachment of the adhesive layer 22, good long-term fixation can be achieved by the glue layer 47, while at the same time achieving good detachment in the event of recycling.

In a specific exemplary embodiment, which has very good properties in terms of durability and separability in the case of recycling, the following dimensions are provided: glue layer width 51=1 mm; glue segment length 53=1 mm; first glue layer interruption 50=15 mm; adhesive layer width 33=1 mm; adhesive segment length 46=1 mm; first interruption distance 37=15 mm; the adhesive layer 22 and the glue layer 47 are carried out deferred in relation to each other. It is assumed that the advantageous properties can still be achieved with a dimensional deviation of 20% from the specific exemplary embodiment.

The exemplary embodiments show possible embodiment variants, and it should be noted in this respect that the invention is not restricted to these particular illustrated embodiment variants of it, but that rather also various combinations of the individual embodiment variants are possible and that this possibility of variation owing to the technical teaching provided by the present invention lies within the ability of the person skilled in the art in this technical field.

The scope of protection is determined by the claims. Nevertheless, the description and drawings are to be used for construing the claims. Individual features or combinations of features from the different exemplary embodiments shown and described may represent independent inventive solutions. The object underlying the independent inventive solutions can be taken from the description.

All indications regarding ranges of values in the present description are to be understood such that these also comprise random and all partial ranges from it, for example, the indication 1 to 10 is to be understood such that it comprises all partial ranges based on the lower limit 1 and the upper limit 10, i.e. all partial ranges start with a lower limit of 1 or larger and end with an upper limit of 10 or less, for example 1 through 1.7, or 3.2 through 8.1, or 5.5 through 10.

Finally, as a matter of form, it should be noted that for ease of understanding of the structure, elements are partially not depicted to scale and/or are enlarged and/or are reduced in size.

LIST OF REFERENCE SIGNS

• • 1 combination packaging container
  • 2 inner container
  • 3 bottom
  • 4 container casing
  • 5 open end
  • 6 flange
  • 7 closed end
  • 8 longitudinal axis
  • 9 container height
  • 10 undercut diameter
  • 11 shoulder
  • 12 outer part
  • 13 blank
  • 14 first end portion
  • 15 second end portion
  • 16 overlap area
  • 17 first longitudinal edge
  • 18 second longitudinal edge
  • 19 first front side
  • 20 second front side
  • 21 construction height
  • 22 adhesive layer
  • 23 support device
  • 24 support element distance
  • 25 outer surface
  • 26 inner surface
  • 27 first adhesive segment
  • 28 second adhesive segment
  • 29 first interruption
  • 30 further adhesive segment
  • 31 longitudinal extension
  • 32 length
  • 33 adhesive layer width
  • 34 longitudinal edge length
  • 35 distance
  • 36 adhesive contact surface
  • 37 first interruption distance
  • 38 first adhesive segment diameter
  • 39 second adhesive segment diameter
  • 40 support layer
  • 41 printing layer
  • 42 sealing layer
  • 43 nozzle
  • 44 recess
  • 45 wide nozzle
  • 46 adhesive segment length
  • 47 glue layer
  • 48 first glue segment
  • 49 second glue segment
  • 50 first glue layer interruption
  • 51 glue layer width
  • 52 first glue layer interruption distance
  • 53 glue segment length