EP0697340A1 - Folding carton, especially for tea-bags - Google Patents

Abstract

The folding box has a rectangular cardboard cut-out (1) with four fold lines (3,4,5,6) to form a square container with open face sides. A rectangular cardboard cut-out (2) has folding tabs (15,16,17,18) produced on each of the four free sides. The lid (9) in the cut-out (1) is preformed with two partially penetrating punched lines (10,11) converging at the locking flap (12). The locking flap is arranged on the free edge (13) of the cut-out and matches a preformed slot (14) with a partially penetrating punched line.

Description

The invention relates to a folding box made of cardboard, which consists of a blank folded into a cuboid, in which a hinged lid is formed with a locking tab provided for locking insertion into the box, in particular for accommodating tea infusion bags.

Such folding boxes made of cardboard or cardboard are known and are used for packaging a wide variety of goods, including tea infusion bags. As part of the manufacture, as well as for sale and later use by the consumer, there are many requirements for such packaging. During production, the cardboard blank should be folded and glued to the folded box with the least amount of packaging material, and high strength should be achieved. After filling, a closure which is firm for sale is expected, in which the consumer immediately recognizes that the packaging has not yet been opened. The packaging should be aroma-tight. Finally, the consumer must be able to close a opened package in such a way that the goods are still protected against the influence of moisture and atmosphere and against loss of aroma.

From the German utility model G 93 17 646.5 a folding box for tea infusion bags made of cardboard is known, which has a hinged lid with a closure flap with which a new closure is possible after the first opening. The disadvantage here is that of production the underlying blank is complicated, the packaging material is handled generously and the packaging weight is high, and finally a closure flap technique that is complicated to manufacture is used.

In contrast, the invention is based on the object of proposing a folding box of the simplest cut, which can be produced inexpensively in a simple manner with savings advantages in packaging material and nevertheless ensures high stability and aroma tightness, even after opening.

To achieve the object, a folding box of the type mentioned at the outset is characterized according to the invention by a rectangular cardboard blank with four transverse folding lines for producing a cuboid with open end faces, which are flush-fitted by means of fitted separate end-face covers, each of which has a rectangular cardboard blank with connecting flaps that can be bent at right angles to the four free sides are produced, the lid in the cardboard blank for the manufacture of the cuboid being formed by two spaced-apart punching lines which only partially penetrate the cardboard and which are brought together in the closure flap which is arranged in the free edge of the cardboard blank and with one pre-formed slot corresponds, the punching line of which only partially penetrates the carton.

With the invention, therefore, a box longitudinal part is folded from an extremely simply constructed rectangular cardboard blank, the open end faces of which are closed flush again by cardboard blanks of very simple construction, which form end face covers. Any complicated shape of cut is avoided. The design of the tear-open lid in the cardboard blank is also structurally simple, in that the pre-formed punching lines are brought together in the closure flap arranged on the outer edge, which can be inserted into a corresponding slot for reclosing the box. The aroma tightness is guaranteed by the pre-formed punching lines Only partially penetrate the cardboard so that the folding box is completely closed until it is opened by the consumer.

The end face covers are preferably made of a material of higher cardboard weight than that of the cut for the cuboid, so that a very high stability is achieved, which in turn makes it possible to use a cardboard material of substantially lower cardboard weight for the longitudinal box part. This results in considerable savings in packaging material, which are not only noticeably noticeable in the course of manufacture, but also in disposal after the contents of the pack have been used up. The cardboard weight of the end covers is preferably 230-280 g / m2, in particular 275 g / m2, and that of the cuboid is 200-250 g / m2, in particular 225 g / m2. In this way, considerable material savings are achieved with good stability.

According to a further proposal of the invention, the end face cover can be glued to the cuboid over the entire contact surface in order to increase the stability. This is much more advantageous than folding and gluing the end covers in place, which would also be conceivable. In addition, the full adhesion also improves the aroma tightness.

According to an expedient development of the invention, the end covers have overlapped corners for the same purpose, which have the advantage that when the connecting brackets are angled, the corner regions are compressed and thus there is also a seamless, tight connection in these problem areas when gluing.

In order to further increase the aroma tightness of the folding box, it is proposed according to an advantageous development of the invention to design all of the pre-formed punching lines as punching lines which are offset in parallel on the front and on the back of the blank and penetrate the carton only about to the middle of the carton material. As a result, the cardboard shears in a defined manner between the offset punching lines when it is torn open, so that after opening a mutually overlapping one Cover area arises, which also ensures aroma tightness when resealing by means of the locking tab. A cardboard lip seal is provided practically along the punching lines.

In order to further increase the gas tightness, a special cardboard material with a higher barrier property can be used, in particular a recyclable packaging cardboard with a water vapor barrier, built up from fresh fiber cardboard with a chlorine-free coating. Such a material is commercially available under the name Biocoat-FA. The main area of application for this carton is the packaging of greasy, non-wet goods, aroma-tight packaging of dry, hygroscopic goods.

With a weight per unit area of 275 g / m2 (tolerance +/- 8 g) and a cardboard thickness of 485 my (tolerance +/- 10 my), a water vapor permeability of 5.0 g / m2 was measured in 24 hours in the use according to the invention. This with a relative humidity of 50% and a room climate of 23 ° Celsius.

The fat density was classified in class 2 according to DIN 53116. Biocoat-FA is rated as very good in terms of its recyclability. The Biocoat-FA can be glued using starch glue.

Fig. 1

einen Kartonzuschnitt zur Herstellung eines seitlich offenen Quaders und

Fig. 2

einen Kartonzuschnitt einer Stirnseitenabdeckung zum Verschließen des Quaders.

Further details, features and advantages of the subject matter of the invention result from the following description of the associated drawings, in which a preferred exemplary embodiment is shown schematically. The drawing shows:

Fig. 1

a cardboard blank for producing a laterally open cuboid and

Fig. 2

a cardboard blank of an end cover to close the cuboid.

The cardboard folding box that can be produced from the two blanks according to FIGS. 1 and 2 has three individual parts, namely the cuboid blank 1 and two End face cover blanks 2 for closing the open end faces of the cuboid. The cuboid blank 1 is provided with four transverse fold lines 3, 4, 5, 6, which represent crease edges during the manufacture of the cuboid. After its manufacture, the latter has a front side 7 and an upper side 8, in which a lid 9, which can be opened and closed again after the folding box has been opened, is formed. For this purpose, two spaced-apart punching lines 10, 11, which only partially penetrate the carton, are formed on the front 7 and top 8, which are brought together in a closure flap 12, which is arranged in the free edge 13 of the carton blank and corresponds to a pre-punched slot 14 whose punching line only partially penetrates the box. To open the box, it is only necessary to pull the closure flap 12 out of the edge 13 and to expose the lid 9 along the punching lines 10, 13. To reclose the folding box, the user inserts the closure flap 12 into the slot 14.

The punching lines 10, 11 provided for tearing open the folding box are offset parallel to one another, the outer punching line running on the front of the blank and the inner one on the invisible back, which is why it is shown in broken lines in FIG. 1 of the drawing. The parallel punching lines do not penetrate the carton completely, so that a secure seal is guaranteed in the state of sale. When opening, the lid tears horizontally along the punching lines, so that sealing lips remain at the top and bottom, which again ensure a good aroma seal after the folding box is opened when it is closed again.

The open sides of the cuboid are closed flush by two end covers, which consist of a blank according to FIG. 2 of the drawing. This is of simple rectangular shape and has four connecting straps 15, 16, 17, 18 on its edges, which can be bent at right angles. Overcut corners 19 are formed between adjacent connecting straps and are pressed together when the connecting straps 15 to 17 are angled. The end face covers are glued in by gluing over the entire contact surface of the Connection tabs carried out with the corresponding surfaces of the cuboid, so that a completely sealed folding box is created.

An essential feature of the folding box shown is that the front covers are made from a blank 2 according to FIG. 2 of the drawing, which has a higher cardboard weight than the rectangular blank 1. In the exemplary embodiment, the cardboard weight of the front cover blank is 275 g / m2, while the box weight of the square blank is 225 g / sqm. This enables a significant reduction in the total weight of the packaging and thus the amount of material used.

In particular, a recyclable packaging board with a water vapor barrier, constructed from fresh fiber board with a chlorine-free coating, is used as the board material with high barrier properties and gas-tightness against loss of aroma.

Such a material is commercially available under the name Biocoat-FA. The main areas of application for this carton are the packaging of greasy, not wet filling goods and aroma-tight packaging of dry, hygroscopic goods.

With a weight per unit area of 275 g / m2 (tolerance +/- 8 g) and a cardboard thickness of 485 my (tolerance +/- 10 my), a water vapor permeability of 5.0 g / m2 was measured in 24 hours in the use according to the invention. This with a relative humidity of 50% and a room climate of 23 ° Celsius.

The fat density was classified in class 2 according to DIN 53116. Biocoat-FA is rated as very good in terms of its recyclability. The Biocoat-FA is glued using starch glue.

Reference list

1

Cuboid cut

2nd

Front cover blank

3rd

Fold line

4th

Fold line

5

Fold line

6

Fold line

7

front

8th

Top

9

cover

10th

Punching line

11

Punching line

12th

Locking tab

13

edge

14

slot

15

Connecting strap

16

Connecting strap

17th

Connecting strap

18th

Connecting strap

19th

corner

Claims (7)

Folding box made of cardboard, which consists of a blank folded into a cuboid, into which a hinged lid is formed with a closure flap for locking insertion into the box, in particular for holding tea infusion bags,
marked by
a rectangular cardboard blank (1) with four transverse fold lines (3, 4, 5, 6) for the production of a cuboid with open end faces, which are flush-fitted by means of fitted separate end face covers, each consisting of a rectangular cardboard blank (2) with right-angled connecting flaps ( 15, 16, 17, 18) are produced on the four free sides, the lid (9) in the cardboard blank (1) for producing the cuboid by means of two punching lines (10, 11) which are arranged at a distance from one another and only partially penetrate the cardboard. is formed, which are brought together in the closure flap (12), which is arranged on the free edge (13) of the cardboard blank and corresponds to a pre-formed slot (14), the punching line of which only partially penetrates the cardboard. Folding box according to claim 1, characterized in that the end covers consist of a material of higher cardboard weight than that of the blank (1) for the cuboid. Folding box according to claims 1 and 2, characterized in that the cardboard weight of the material of the end covers is 230-280 g / m2, preferably 275 g / m2 and that of the cuboid is 200-250 g / m2, preferably 225 g / m2. Folding box according to one of claims 1 to 3, characterized in that the end face cover is glued to the cuboid over the entire contact surface of the connecting flaps (15, 16, 17, 18) to increase stability. Folding box according to one of claims 1 to 4, characterized in that the front cover blanks (2) have overcut corners (19) which are compressed when the connecting flaps (15, 16, 17, 18) are bent. Folding box according to one of claims 1 to 5, characterized in that the pre-formed punching lines (10, 11) are formed as punching lines which are offset in parallel at the front and at the rear of the blank and penetrate the carton only to the middle of the carton material. Folding box according to one of claims 1 to 6, characterized in that a recyclable packaging board with a water vapor barrier constructed from fresh fiber board with a chlorine-free coating is used.

Images