EP3705415A1 - Package, in particular for food products - Google Patents

Abstract

Packaging, especially for food, comprises a tray (1) made of cardboard or cardboard and a lid (2) which is placed on the tray (1) when the packaging is closed and overlaps an upper edge of the tray (1) on the outside, with at least two side walls (3, 4) of the cover (2) arranged, inwardly projecting knobs (5) interact with retaining elements (6) arranged on associated side walls (7, 8) of the shell (1). The opposite side walls (7, 8) of the shell (1) having the retaining elements (6) each have a wall section (9) which is connected to the bottom (10) of the shell (1) via a kink, one to the upper end of the wall section (9) connected via a kink, a first reinforcement section (11) connected to the first reinforcement section via a kink, and a second reinforcement section (12) connected to the second reinforcement section (12) via a kink, which is connected to the outside of the wall section (9) is glued, a section of the wall section (9) lying above the adhesive section (13), the first stiffening section (11) and the second stiffening section (12) delimiting a channel (14) with a triangular cross-section. The retaining elements (6) for the knobs (5) are formed by the edges of openings (15) in the second stiffening sections (12) or by the downwardly directed outer surfaces of the second stiffening sections (12). (Fig. 3)

Description

The invention relates to packaging, in particular for foodstuffs, comprising a tray made of cardboard or cardboard and a lid that is placed on the tray when the packaging is closed and overlaps an upper edge of the tray on the outside, with at least two side walls of the lid arranged inwardly protruding knobs interact with retaining elements arranged on associated side walls of the shell.

Packagings for food, for example cakes, pastries, ready meals or salads are known, which consist of a plastic bowl and a plastic lid, in particular a hat-shaped lid, placed thereon, the lid having protruding knobs that interact with retaining elements of the bowl. At least the plastic of the lid, possibly also the plastic of the shell, can be made transparent. Such packaging is also referred to as blister packaging.

To reduce the amount of plastic it has already been proposed to form the tray from cardboard or cardboard. Previously known “hybrid” packagings of this type are disadvantageous in various respects, in particular with regard to handling and / or the stability and / or the retention of the attached lid on the tray.

The object of the invention is to provide an advantageous packaging of the type mentioned at the beginning, which can be easily handled and designed with good stability. According to the invention, this is achieved by a packaging with the features of claim 1.

In the packaging according to the invention, side walls of the tray have which Retaining elements for interacting with inwardly projecting knobs of the cover each have a wall section which is connected to the bottom of the shell via a kink, a first stiffening section connected to the upper end of the wall section via a kink, and one to the first stiffening section via a kink connected to the second stiffening portion and a connected to the second stiffening portion via a kink adhesive portion which is glued to the outside of the wall portion. A partial section of the wall section which lies above the gluing section, the first stiffening section and the second stiffening section together delimit a channel which is triangular in cross section. The retaining elements for the knobs are formed by edges of openings in the second stiffening sections or by the downwardly directed outer surfaces of the second stiffening sections.

In the case of a shell designed in accordance with the invention, a very good hold of the lid connected to the shell can be provided, in particular due to the stability of the areas in which the retaining elements for the knobs of the lid are arranged.

Preferably, at least two opposite side walls of the lid have inwardly projecting knobs, which cooperate with retaining elements arranged on opposite side walls of the shell. An embodiment which is advantageous in terms of manufacturing technology provides that such inwardly projecting knobs are provided only on two opposite side walls of the lid and the shell accordingly only has retaining elements arranged on two opposite side walls that interact with the knobs of the lid.

An expedient embodiment provides that each of the second stiffening sections has at least two openings spaced from one another in the direction of the longitudinal extent of the respective channel, into which a knob of the cover engages.

A shell of the packaging designed in accordance with the invention can advantageously be unfolded from a flat blank made of cardboard or cardboard and glued. Simple and effective production can thereby be made possible.

The weight per unit area of the cardboard or paperboard from which the tray is formed is in particular more than 150 g / m ² . From such a weight per unit area one generally speaks of cardboard. With a basis weight from 225 g / m ² , sometimes only from 300 g / m ² , one usually speaks of cardboard.

The cardboard or paperboard from which the tray is made is advantageously made of multiple layers.

It can be solid cardboard or solid cardboard or corrugated cardboard or corrugated cardboard.

In a possible embodiment of the invention, in the case of a flat blank of cardboard or cardboard, successive side walls can be connected to one another in the circumferential direction of the shell via connecting sections which are glued to at least one of the successive side walls when the shell is unfolded and glued. Such connecting sections can each have a first and a second triangular section. In the flat state of the cut of the shell, the first and the second triangular section can each adjoin the adjacent side wall via a kink line, this kink line starting from the corner of the base at which the respective connecting section is arranged. The first and second connecting sections. are then separated from each other by a kink line that starts from the corner of the floor and is at an angle of 135 ° to the respective of the two side edges of the floor, which together enclose the corner. When unfolding the shell from the blank, the first and second triangular sections of the respective Folded connecting portion, then folded over to one of the adjacent side walls and glued to this.

The crease lines of the blank, at which it is creased when the tray is unfolded, can be in the form of creasing lines (which are formed by creasing the cardboard or cardboard) or in the form of perforation lines (which are formed by perforating the cardboard or cardboard) be trained.

The cover, which is preferably made of a, in particular transparent, plastic, for example PET, advantageously has a widened lower base section which, via gradations, connects at least the side walls of the cover with the knobs to the part of the cover lying above. At least two opposite gradations of the cover rest on the upper sides of the first reinforcement sections of the opposite side walls of the shell.

Fig. 1 und 2

Schrägsichten eines Ausführungsbeispiels einer erfindungsgemäßen Verpackung im zusammengesetzten Zustand der Schale und des Deckels;

Fig. 3

einen Vertikalschnitt durch die Verpackung im zusammengesetzten Zustand;

Fig. 4

einen entsprechenden Vertikalschnitt in Schrägsicht;

Fig. 5 und 6

Schrägsichten des Deckels der Verpackung aus unterschiedlichen Blickrichtungen;

Fig. 7

eine Seitenansicht des Deckels;

Fig. 8

einen Schnitt entlang der Linie AA von Fig. 7;

Fig. 9 und 10

Schrägsichten der Schale der Verpackung aus verschiedenen Blickrichtungen;

Fig. 11 und 12

Seitenansichten der Schale;

Fig. 13

eine Unteransicht der Schale;

Fig. 14

einen Zuschnitt zur Ausbildung der Schale;

Fig. 15, 16 und 17

schematische Darstellungen zur Verdeutlichung möglicher Abwandlungen der Ausbildung der Schale im Bereich einer einen Kanal aufweisenden Seitenwand.

Further advantages and details of the invention are explained below with reference to the accompanying drawing. In this show:

Figs. 1 and 2

Oblique views of an embodiment of a packaging according to the invention in the assembled state of the tray and the lid;

Fig. 3

a vertical section through the packaging in the assembled state;

Fig. 4

a corresponding vertical section in an oblique view;

Figures 5 and 6

Oblique views of the lid of the packaging from different viewing directions;

Fig. 7

a side view of the lid;

Fig. 8

a section along the line AA of Fig. 7 ;

Figures 9 and 10

Oblique views of the shell of the packaging from different viewing directions;

Figures 11 and 12

Side views of the shell;

Fig. 13

a bottom view of the shell;

Fig. 14

a blank for forming the shell;

Figures 15, 16 and 17

schematic representations to illustrate possible modifications of the design of the shell in the region of a side wall having a channel.

The figures have different scales.

An embodiment of the invention is described below with reference to FIG Figs. 1 to 14 explained. The packaging is formed by a tray 1 made of cardboard or cardboard and a lid 2 made of, preferably transparent, plastic, for example PET. The cover 2 can be connected to the shell 1 via a snap connection. For this purpose, the cover 2 has two inwardly projecting knobs 5 on each of two opposite side walls 3, 4. When the cover 2 is placed on the shell 1, the cover 2 overlaps an upper edge of the shell 1 on the outside, the knobs 5 interacting with retaining elements 6 which are arranged on two opposite side walls 7, 8 of the shell 1.

The opposite side walls 7, 8 of the shell 1 having the retaining elements 6 each have a wall section 9 which is connected to the bottom 10 of the shell 1 via a bend, the wall section 9 with the bottom 10 having a range from 90 ° to 135 ° includes lying angle. This angle is preferably in the range from 90 ° to 110 °, in the exemplary embodiment around 105 °.

A first stiffening section 11 is connected to the upper end of the wall section 9 via a bend, the wall section 9 and the first stiffening section 11 forming an angle in the range from 30 ° to 150 °, preferably in the range from 45 ° to 135 °, in the exemplary embodiment of includes about 60 °. The first stiffening section 11 extends outward to its end remote from the wall section 9.

With the end of the first stiffening section 11 remote from the wall section 9, a second stiffening section 12 is connected via a bend, the first stiffening section 11 with the second Stiffening section 12 encloses an angle in the range from 20 ° to 120 °, preferably 45 ° to 90 °, in the exemplary embodiment of about 70 °. The second stiffening section 12 runs from its end of the first stiffening section 11 remote from the upper end of the wall section 9 to the outside of the wall section 9. An adhesive section 13 is connected via a kink to this end of the second stiffening section 12 which is adjacent to the outside of the wall section 9 , the second stiffening section 12 enclosing an angle in the range from 80 ° to 160 °, preferably 90 ° to 145 °, in the exemplary embodiment of approximately 135 ° with the adhesive section 13. The gluing section 13 runs downward from its end connected to the second reinforcing section 12 and is glued to the outside of the wall section 9, preferably over its entire extent.

A channel 14 is thus formed in each case, which is delimited by a partial section of the wall section 9, which lies above the gluing section 13, the first stiffening section 11 and the second stiffening section 12. The channel 14 has a triangular cross-section, i. In the vertical cross-section through the shell, the subsection of the wall section 9 lying above the adhesive section 13, the first reinforcement section 11 and the second reinforcement section 12 lie on the sides of a triangle.

The channels 14 run horizontally, preferably over the entire longitudinal extent of the opposite side walls 7, 8.

As a result of this design, the opposite side walls 7, 8 are significantly reinforced, in particular in the areas in which the channels 14 are formed.

To form the retaining elements 6, the second stiffening sections 12 have openings 15 which are designed in the form of window recesses. Such an opening 15 is provided for each of the knobs 5, that is to say in the Exemplary embodiment, two openings 15 are provided per side wall 7, 8, which are spaced from one another in the direction of the longitudinal extension of the respective channel 14. The horizontally extending edges of the openings 15 at the top form the retaining elements 6 which counteract a lifting of the cover 2 upwards (at least up to a certain lifting force).

In the exemplary embodiment, the openings 15 extend up to the edge of the first reinforcement section 11 adjoining the second reinforcement section 12.

The first and second reinforcing sections 11, 12 form outwardly protruding flanges of the shell 1.

The cover 2 has a widened lower base section which adjoins the overlying part of the cover 2 via steps 18, 19 of the side walls 3, 4, 16, 17. The gradations 18 of the side walls 3, 4 having the knobs 5 rest on the first stiffening sections 11 of the side walls 7, 8 of the shell 1 when the cover 2 is placed on the shell 1.

The gradations 19 of the side walls 16, 17 of the lid 2 rest on the upper edges of the side walls 20, 21 of the shell 1, which extend between the side walls 7, 8 of the shell 1 that have the channels 14.

The formation of the shell 1 takes place from a blank of cardboard or cardboard, which is laid out flat on a flat surface in Fig. 14 is shown. Between the in the circumferential direction of the shell 1 successive side walls 7, 21; 21, 8; 8, 20; 20, 7 each has a connecting section 22 via which the respective successive side walls are connected to one another. A respective connecting section 22 has a first and a second triangular section 22a, 22b. The respective first triangular section 22a is separated from the respectively adjacent side wall by a kink line 23 starting from the respective corner. The respective second triangular section 22b extends from the respective adjacent side wall a folding line 24 starting from the respective corner is separated. The first and the second triangular section 22a, 22b are each separated from one another by a fold line 25. This kink line 25 starts from the respective corner of the floor 10 and is at an angle of 135 ° to the two side edges of the floor, which together enclose the corner. The folding line 25 divides the connecting section 22 such that two triangular sections 22a, 22b of equal size are formed.

In order to form the shell 1 from the blank, the triangular sections 22a, 22b of a respective connecting section 22 are folded together so that they preferably protrude outwards. Here, the wall sections 9 of the side walls 7, 8 and the side walls 20, 21 are bent upwards relative to the base 10 by the bending lines 29, 30. As a result, the folded triangular sections 22a, 22b are each folded over to form one of the side walls 20, 21 and glued to this. The areas that will be glued together are in Fig. 14 indicated by dashed lines.

As a result, the gluing sections 13 are bent relative to the second reinforcing sections 12 around the kink lines 26, the second reinforcing sections 12 are bent opposite the first reinforcing sections 11 around the bending lines 27 and the first reinforcing sections are bent opposite the wall sections 9 around the bending lines 28 and the gluing sections 13 are attached to the Outer sides of the wall sections 9 are glued. The areas in which the gluing sections 13 are glued to the wall sections 9 are shown in FIG Fig. 14 indicated by dashed lines.

The folding lines 23-30 can be formed by crease lines or by perforation lines. For example, the crease lines 23, 26 can be designed as perforation lines and the remaining crease lines as crease lines.

The Figs. 15-17 show various possible modifications of the angles between the wall sections 9, first stiffening sections 11, second Stiffening sections 12 and adhesive sections 13, channels 14 being formed in each case with a triangular cross section. The outer surfaces of the second stiffening sections 12 each point downwards at a more or less large angle to the horizontal and can each be provided with openings, the edges of which form the retaining elements 6 for the knobs 5 of the cover 2.

Different modifications of the exemplary embodiments shown are conceivable and possible without departing from the scope of the invention.

In principle, it would be conceivable and possible for the openings 15 in the second reinforcement sections 12 to be omitted, the downwardly directed outer surfaces of the second reinforcement sections 12 interacting with the knobs 5 in order to lift the cover 2 upwards (at least to a certain extent) Counteract lifting force). Such training can be appropriate in particular during training Fig. 16 be useful in which the second stiffening section 12 is horizontal.

Openings in the second stiffening sections 12 could also be designed in such a way that the carton or cardboard is only punched over part of the circumference of the opening, preferably over three sides, and inwards in the area of the opening when it is connected to the lid through the knobs is pushed in. The connection between the indented section and the rest of the material of the blank preferably remains at an edge on which, in particular, a kink line is formed. In order to form the opening, a tab is pivoted inwards about this kink line (into the channel 14).

The second stiffening section 12 could also extend obliquely upwards from its connection with the first stiffening section 11 to the wall section 9. Even with such a design, the downwardly directed outer surfaces of the second reinforcement sections 12 can be the retaining elements form 5 for the knobs.

The gradations 19 of the cover 2 could also be omitted.

The connecting sections 22 could also be designed in other ways. For example, one of the two side walls adjoining one another could have an attached tab (extending the side wall) which, after the side walls have been unfolded, is bent over and glued to the outside of the adjacent side wall.

When viewed from above, the packaging could also have a shape other than a square shape, for example a hexagonal or octagonal shape.

A packaging designed in accordance with the invention can also be provided for packaging objects other than food, for example household objects. Legend for the reference numbers: 1 Bowl 26th Kink line 2 cover 27 Kink line 3 Side wall 28 Kink line 4th Side wall 29 Kink line 5 Nub 30th Kink line 6th Retaining element 7th Side wall 8th Side wall 9 Wall section 10 ground 11 first stiffening section 12 second stiffening section 13 Gluing section 14th channel 15th opening 16 Side wall 17th Side wall 18th gradation 19th gradation 20th Side wall 21st Side wall 22nd Connection section 22a first triangular section 22b second triangular section 23 Kink line 24 Kink line 25th Kink line

Claims (10)

Packaging, in particular for food, comprising a tray (1) made of cardboard or cardboard and a lid (2) which is placed on the tray (1) when the packaging is closed and overlaps an upper edge of the tray (1) on the outside, with at least inwardly projecting knobs (5) arranged on two side walls (3, 4) of the lid (2) interact with retaining elements (6) disposed on associated side walls (7, 8) of the shell (1), characterized in that the retaining elements ( 6) having side walls (7, 8) of the shell (1) each have a wall section (9) which is connected to the bottom (10) of the shell (1) via a bend, one to the upper end of the wall section (9) have a first stiffening section (11) connected to a kink, a second stiffening section (12) connected to the first stiffening section via a kink and a gluing section (13) connected to the second stiffening section (12) via a kink, which is glued to the outside of the wall section (9), with a section of the wall section (9) lying above the adhesive section (13), the first reinforcement section (11) and the second reinforcement section (12) delimiting a channel (14) with a triangular cross-section and that the retaining elements (6) for the knobs (5) are formed by the edges of openings (15) in the second reinforcement sections (12) or by the downwardly directed outer surfaces of the second reinforcement sections (12). Packaging according to claim 1, characterized in that the lid (2) has a widened lower base section which, via steps (18) of the side walls (3, 4) of the lid (2) having the knobs (5), is attached to the overlying part of the Cover (2) connects, the Steps (18) rest on the first stiffening sections (11) of the side walls (7, 8) of the shell (1). Packaging according to claim 1 or 2, characterized in that the lid (2) has inwardly projecting knobs (5) on at least two opposite side walls (3, 4) which are connected to opposite side walls (7, 8) of the shell (1) arranged retaining elements (6) cooperate. Packaging according to one of Claims 1 to 3, characterized in that side walls (7, 21; 21, 8; 8, 20; 20, 7) which follow one another in the circumferential direction of the shell (1) are connected to one another via connecting sections (22) which are attached to at least one of the successive side walls are glued. Packaging according to Claim 4, characterized in that the connecting sections (22) each have a first and a second triangular section (22a, 22b), the first and the second triangular section (22a) in the flat-out state of the blank of the tray (1) , 22b) are each separated from the adjacent side wall by a kink line (23, 24), which starts at the corner of the base (10) at which the respective connecting section (22) is arranged, and the first and second triangular sections ( 22a, 22b) are separated from one another by a kink line which starts from the corner of the floor and is at an angle of 135 ° to the respective of the two side edges of the floor (10) which together enclose the corner. Packaging according to one of claims 1 to 5, characterized in that the angle between the bottom (10) of the tray (1) and the respective wall section (9), the upper end of which has a respective bend with the respective first stiffening section (11) is connected, in the range of 45 ° to 90 °. Packaging according to one of claims 1 to 6, characterized in that the angle between the wall section (9) and the first stiffening section (11) of the respective side wall (7, 8) is in the range of 30 ° to 150 °, preferably in the range of 45 ° to 135 °. Packaging according to one of claims 1 to 7, characterized in that the angle between the first and the second stiffening section (11, 12) of the respective side wall (7, 8) is in the range of 20 ° to 120 °, preferably in the range of 45 ° up to 90 °. Packaging according to one of claims 1 to 8, characterized in that the angle between the second stiffening section (12) and the gluing section (13) of the respective side wall (7, 8) is in the range of 80 ° to 160 °, preferably in the range of 90 ° to 145 °. Packaging according to one of Claims 1 to 9, characterized in that the lid (2) consists of plastic.

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