Packaging, especially for food

Abstract

A packaging, especially for food, including a cardboard shell and a cover placed thereon in the closed state and which engages over the outside of an upper edge of the shell. Inwardly protruding nubs arranged at at least two opposing side walls of the cover interact with retaining elements at associated side walls of the shell. The side walls having the retaining elements each have a wall portion which is connected to the bottom of the shell by a bend, a first reinforcing portion connected to the upper end of the wall portion by a bend, a second reinforcing portion connected to the first reinforcing portion by a bend and an adhesive-secured portion connected to the second reinforcing portion by a bend and which is adhesively bonded to the outer side of the wall portion. A sub-portion of the wall portion that lies above the adhesive-secured portion, and the first and second reinforcing portions delimit a triangular channel. The retaining elements are formed by edges of openings in or by downwardly directed outer surfaces of the second reinforcing portions.

Claims

1. A packaging, comprising: a shell made of cardboard or paperboard and having a bottom, side walls with retaining elements at at least two of the side walls, and an upper edge; a cover which is placed onto the shell in a closed state of the packaging and which engages over an outside of the upper edge of the shell, the cover including cover side walls, and inwardly protruding nubs are arranged at at least two of the cover side walls, the inwardly protruding nubs interact with the retaining elements arranged at associated ones of the side walls of the shell; the side walls of the shell which include the retaining elements each have a wall portion which is connected to the bottom of the shell by way of a bend, a first reinforcing portion connected to an upper end of the wall portion by way of a second bend, a second reinforcing portion connected to the first reinforcing portion by way of a third bend, and an adhesive-secured portion which is connected to the second reinforcing portion by way of a fourth bend and which is adhesively bonded to an outer side of the wall portion, a sub-portion of the wall portion that lies above the adhesive-secured portion, the first reinforcing portion and the second reinforcing portion delimiting a channel which is triangular in cross section; and the retaining elements for the nubs are formed by edges of openings in the second reinforcing portions or by the downwardly directed outer surfaces of the second reinforcing portions; wherein the side walls which succeed one another in the circumferential direction of the shell are connected to one another by way of connecting portions which are adhesively bonded to at least one of the successive side walls, and the connecting portions each have a first and a second triangular portion, the first and the second triangular portion in each case are separated from an adjacent one of the side walls by a bend, which proceeds from a corner of the bottom at which the respective connecting portion is arranged, and the first and the second triangular portion are separated from one another by way of a further bend which proceeds from the corner of the bottom and which is at an angle of 135° with respect to the respective one of the two side edges of the bottom, in the flatly laid-out state, which together form the corner.

2. The packaging as claimed in claim 1, wherein the cover has a widened lower base portion which, by way of gradations of the side walls of the cover having the nubs, adjoins that part of the cover which lies thereabove, the gradations resting on the first reinforcing portions of the side walls of the shell.

3. The packaging as claimed in claim 1, wherein the inwardly protruding nubs are arranged at least at two opposing ones of the cover side walls, said nubs interacting with the retaining elements that are arranged at opposing ones of the side walls of the shell.

4. The packaging as claimed in claim 1, wherein an angle between the bottom of the shell and the respective wall portion, the upper end of which is connected to the respective first reinforcing portion by way of the respective second bend, lies in a range of 45° to 90°.

5. The packaging as claimed in claim 1, wherein an angle between the wall portion and the first reinforcing portion of the respective side wall lies in a range of 30° to 150°.

6. The packaging as claimed in claim 1, wherein an angle between the first and the second reinforcing portion of the respective side wall lies in a range of 20° to 120°.

7. The packaging as claimed in claim 1, wherein an angle between the second reinforcing portion and the adhesive-secured portion of the respective side wall lies in a range of 80° to 160°.

8. The packaging as claimed in claim 1, wherein the cover is comprised of plastic.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further advantages and details of the invention will be elucidated below on the basis of the attached drawing, in which:

(2) FIGS. 1 and 2 show oblique views of one exemplary embodiment of a packaging according to the invention in the assembled state of the shell and the cover;

(3) FIG. 3 shows a vertical section through the packaging in the assembled state;

(4) FIG. 4 shows a corresponding vertical section in an oblique view;

(5) FIGS. 5 and 6 show oblique views of the cover of the packaging from various viewing directions;

(6) FIG. 7 shows a side view of the cover;

(7) FIG. 8 shows a section along the line AA of FIG. 7;

(8) FIGS. 9 and 10 show oblique views of the shell of the packaging from various viewing directions;

(9) FIGS. 11 and 12 show side views of the shell;

(10) FIG. 13 shows a view of the shell from below;

(11) FIG. 14 shows a blank for forming the shell; and

(12) FIGS. 15, 16 and 17 show schematic depictions for the purposes of illustrating possible modifications of the configuration of the shell in the region of a side wall having a channel.

(13) The figures have different scales.

DETAILED DESCRIPTION

(14) One exemplary embodiment of the invention will be elucidated below on the basis of FIGS. 1 to 14. The packaging is formed by a shell 1 made of cardboard or paperboard and a cover 2 made of preferably transparent plastic, for example PET. The cover 2 can be connected to the shell 1 by way of a snap-in connection. For this purpose, the cover 2 has in each case two inwardly protruding nubs 5 at two opposing side walls 3, 4. In the state when the cover 2 has been placed onto the shell 1, the cover 2 engages over the outside of an upper edge of the shell 1, the nubs 5 interacting with retaining elements 6 arranged at two opposing side walls 7, 8 of the shell 1.

(15) The opposing side walls 7, 8 of the shell 1 having the retaining elements 6 each have a wall portion 9 which is connected to the bottom 10 of the shell 1 by way of a bend, the wall portion 9 enclosing an angle lying in the range of 90° to 135° with the bottom 10. Preferably, said angle lies in the range of 90° to 110°, in the exemplary embodiment at approximately 105°.

(16) A first reinforcing portion 11 is connected to the upper end of the wall portion 9 by way of a bend, the wall portion 9 enclosing an angle in the range of 30° to 150°, preferably in the range of 45° to 135°, in the exemplary embodiment of approximately 60°, with the first reinforcing portion 11. In this case, the first reinforcing portion 11 extends outwardly toward that end thereof which is remote from the wall portion 9.

(17) A second reinforcing portion 12 is connected to that end of the first reinforcing portion 11 which is remote from the wall portion 9 by way of a bend, the first reinforcing portion 11 enclosing an angle in the range of 20° to 120°, preferably 45° to 90°, in the exemplary embodiment of approximately 70°, with the second reinforcing portion 12. The second reinforcing portion 12 runs from that end of the first reinforcing portion 11 which is remote from the upper end of the wall portion 9 as far as the outer side of the wall portion 9. An adhesive-secured portion 13 is connected by way of a bend to said end of the second reinforcing portion 12 which adjoins the outer side of the wall portion 9, the second reinforcing portion 12 enclosing an angle in the range of 80° to 160°, preferably 90° to 145°, in the exemplary embodiment of approximately 135°, with the adhesive-secured portion 13. The adhesive-secured portion 13 runs, from the end thereof which is connected to the second reinforcing portion 12, in a downward direction and is adhesively bonded, preferably over the entire extent thereof, to the outer side of the wall portion 9.

(18) In this way, a respective channel 14 is formed, which is delimited by way of a sub-portion of the wall portion 9 that lies above the adhesive-secured portion 13, the first reinforcing portion 11 and the second reinforcing portion 12. The channel 14 has a triangular cross section, that is to say, in the vertical cross section through the shell, that sub-portion of the wall portion 9 which lies above the adhesive-secured portion 13, the first reinforcing portion 11 and the second reinforcing portion 12 lie on the sides of a triangle.

(19) The channels 14 run horizontally, preferably over the entire longitudinal extents of the opposing side walls 7, 8.

(20) By virtue of this configuration, the opposing side walls 7, 8 are substantially reinforced, in particular in the regions in which the channels 14 are formed.

(21) In order to form the retaining elements 6, the second reinforcing portions 12 have openings 15 which are configured in the form of window apertures. Such an opening 15 is provided for each of the nubs 5, therefore, in the exemplary embodiment, in each case two openings 15 are provided per side wall 7, 8, said openings being spaced apart from one another in the direction of the longitudinal extent of the respective channel 14. The horizontally running edges of the openings 15 at the top form the retaining elements 6, which counteract a lifting-off of the cover 2 in an upward direction (at least up to a certain lift-off force).

(22) In the exemplary embodiment, the openings 15 extend as far as that edge of the first reinforcing portion 11 which adjoins the second reinforcing portion 12.

(23) The first and second reinforcing portions 11, 12 form outwardly protruding flanges of the shell 1.

(24) The cover 2 has a widened lower base portion which, by way of gradations 18, 19 of the side walls 3, 4, 16, 17, adjoins that part of the cover 2 which lies thereabove. In the state when the cover 2 has been placed onto the shell 1, the gradations 18 of the side walls 3, 4 having the nubs 5 rest on the first reinforcing portions 11 of the side walls 7, 8 of the shell 1.

(25) The gradations 19 of the side walls 16, 17 of the cover 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 having the channels 14.

(26) The shell 1 is formed from a blank which is made of cardboard or paperboard and which is illustrated in FIG. 14 in the state when it is flatly laid out on a planar substrate. Between the side walls 7, 21; 21, 8; 8, 20; 20, 7 which in each case succeed one another in the circumferential direction of the shell 1, there lies a respective connecting portion 22 by way of which the respectively successive side walls are connected to one another. A respective connecting portion 22 has a first and a second triangular portion 22a, 22b. The respective first triangular portion 22a is separated from the respectively adjacent side wall by way of a bending line 23 which proceeds from the respective corner. The respective second triangular portion 22b is separated from the respectively adjacent side wall by way of a bending line 24 which proceeds from the respective corner. The first and the second triangular portion 22a, 22b are in each case separated from one another by way of a bending line 25. Said bending line 25 proceeds from the respective corner of the bottom 10 and is at an angle of 135° with respect to the two side edges of the bottom which together form the corner. The bending line 25 subdivides the connecting portion 22 in such a way that two triangular portions 22a, 22b of equal size are formed.

(27) In order to form the shell 1 from the blank, the triangular portions 22a, 22b of a respective connecting portion 22 are folded together, such that they preferably protrude toward the outside. In this case, the wall portions 9 of the side walls 7, 8 and the side walls 20, 21 are bent upward in relation to the bottom 10 about the bending lines 29, 30. Subsequently, the folded-together triangular portions 22a, 22b are in each case folded back toward one of the side walls 20, 21 and stuck thereto. The regions which are adhesively bonded to one another are indicated in FIG. 14 by way of dashed lines.

(28) Subsequently, the adhesive-secured portions 13 are bent in relation to the second reinforcing portions 12 about the bending lines 26, the second reinforcing portions 12 are bent in relation to the first reinforcing portions 11 about the bending lines 27 and the first reinforcing portions are bent in relation to the wall portions 9 about the bending lines 28, and the adhesive-secured portions 13 are adhesively bonded to the outer sides of the wall portions 9. Those regions in which the adhesive-secured portions 13 are adhesively bonded to the wall portions 9 are indicated in FIG. 14 by way of dashed lines.

(29) The bending lines 23-30 can be formed by way of crease lines or by way of perforation lines. By way of example, the bending lines 23, 26 can be configured as perforation lines and the remaining bending lines as crease lines.

(30) FIGS. 15 to 17 show various possible modifications of the angles between the wall portions 9, first reinforcing portions 11, second reinforcing portions 12 and adhesive-secured portions 13, with channels 14 which are triangular in cross section being formed in each case. The outer surfaces of the second reinforcing portions 12 each point in a downward direction at a more or less large angle with respect to the horizontal and can each be provided with openings, the edges of which form the retaining elements 6 for the nubs 5 of the cover 2.

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

(32) In principle, it would for example be conceivable and possible for the openings 15 in the second reinforcing portions 12 to be omitted, the downwardly directed outer surfaces of the second reinforcing portions 12 interacting with the nubs 5 in order to counteract a lifting-off of the cover 2 in an upward direction (at least up to a certain lift-off force). Such a configuration may be expedient in particular in the case of the configuration according to FIG. 16, in which the second reinforcing portion 12 is horizontal.

(33) Openings in the second reinforcing portions 12 could also be configured in such a way that the cardboard or the paperboard is only incipiently cut over a part of the circumference of the opening, preferably over three sides, and, during the connection to the cover, is pressed inward by way of the nubs in the region of the opening. Preferably, the connection of the pressed-in portion to the remaining material of the blank remains at an edge at which in particular a bending line is formed. Therefore, for the purposes of forming the opening, a tab is pivoted inward (into the channel 14) about said bending line.

(34) The second reinforcing portion 12 could also run obliquely in an upward direction proceeding from the connection thereof to the first reinforcing portion 11 as far as the wall portion 9. In such a configuration, the downwardly directed outer surfaces of the second reinforcing portions 12 can also form the retaining elements for the nubs 5.

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

(36) The connecting portions 22 could also be configured differently. By way of example, one of the two adjoining side walls could have an attached flap (which lengthens the side wall), which, after the folding-out of the side walls, is folded back and adhesively bonded to the adjacent side wall on the outside.

(37) As seen in plan view, the packaging could also have a shape other than a four-sided shape, for example a six-sided or eight-sided shape.

(38) A packaging configured in accordance with the invention can also be provided for packaging objects other than food, for example for household objects.

LEGEND FOR THE REFERENCE NUMBERS

(39) 1 Shell 2 Cover 3 Side wall 4 Side wall 5 Nub 6 Retaining element 7 Side wall 8 Side wall 9 Wall portion 10 Bottom 11 First reinforcing portion 12 Second reinforcing portion 13 Adhesive-secured portion 14 Channel 15 Opening 16 Side wall 17 Side wall 18 Gradation 19 Gradation 20 Side wall 21 Side wall 22 Connecting portion 22a First triangular portion 22b Second triangular portion 23 Bending line 24 Bending line 25 Bending line 26 Bending line 27 Bending line 28 Bending line 29 Bending line 30 Bending line