DE29901874U1 - Double-chamber folding box with pocket for package insert - Google Patents

Description

A. Lander.er GmbH & Co. KG

Rötelstr. 36

74172 Neckarsulm

Representative:

Kohler Schmid + Partner
Patent Attorneys GbR
Ruppmannstr. 2 7
70565 Stuttgart

Double chamber folding box with pocket for information leaflet

The invention relates to a double-chamber folding box which is erected from a flat, pre-glued folding box or a flat blank, the blank of the double-chamber folding box having at least four rectangular side surfaces, each separated from one another by a fold line, to which two further surfaces, separated from one another by a fold line and located inside when the double-chamber folding box is erected, are connected at one end via a fold line, as well as an adhesive tab attached to the inside surface further away from the side surfaces via a fold line.

Such double-chamber folding boxes have been known for a long time and are available on the market.

A blank for such a double-chamber folding box according to the prior art is shown in Fig. 6. To erect the known folding box, all side surfaces as well as the inner surfaces and the adhesive flap attached to them are each bent by approx. 90° in the direction of the later inside of the box around the corresponding fold lines, the outside of the attached adhesive flap is glued to the inside of the corresponding side surface and the inside of the free end of the opposite side surface is glued to the outside of the inner of the two inner surfaces along the fold line to the side surface adjacent to it. This creates a second chamber inside the folding box, which is delimited on the one hand by the inner sides of two side surfaces and on the other hand by the outer sides of the two inner surfaces running parallel to them in close spatial proximity.

The disadvantage of the known double-chamber folding box is, on the one hand, the open cut edge at the adhesive edge between the inner of the two inner surfaces and the corresponding free side surface, and, on the other hand, the relatively high material consumption caused by the two inner surfaces, which is usually around 190% of an adjacent side surface.

The object of the present invention is to improve a double-chamber folding box with the features mentioned above using the simplest possible means in such a way that the material consumption for the inner surfaces is significantly reduced and no open cutting edge is left on the box.

edge between the inner surface and the corresponding side surface, whereby the stability of the double-chamber folding box should not be reduced.

According to the invention, this object is achieved in a manner that is as surprisingly simple as it is effective in that the two inner surfaces together have a transverse extension in a direction perpendicular to the fold lines that is at least 100%, at most 150%, preferably between 105% and 120% of the transverse extension of the side surface adjacent to the inner surfaces, that the largest transverse extension of one of the inner surfaces is at most 90%, preferably at most 60% of the transverse extension of the side surface adjacent to the inner surfaces, and that on the side of the blank opposite the inner surfaces, a further adhesive tab is attached to the corresponding side surface via a fold line.

This creates a second inner chamber in the folding box, which is essentially limited by the two inner surfaces and the side surface immediately adjacent to the inner surfaces. The material consumption for the inner surfaces is reduced to about half compared to the state of the art and the above-mentioned open cutting edge is avoided. In addition, an additional clamping effect is created on the information leaflet or on cylindrical packaged goods that are placed in the additional small inner chamber, as the latter is given a triangular shape, whereas in double-chamber folding boxes according to the state of the art, the inner surfaces are always parallel to the corresponding side surfaces and thus the position of the goods to be packaged cannot be fixed.

Particularly when used for information leaflets, the inventive geometry means that they inevitably end up in the hands of the consumer, can be easily removed and put back into the box. In known folding boxes, the information leaflet is often in the lower part of the box around the contents and is therefore often ignored and crumpled when the contents are put back into the box.

The small additional chamber in the double-chamber folding box according to the invention is not only suitable for adding information leaflets, but also for small advertising brochures and even for more voluminous goods such as small samples that are packed with the main packaging, since by selecting the appropriate transverse expansion of the inner surfaces, the small inner chamber with a triangular cross-section formed by them can also be given a slightly larger volume if required.

A particularly preferred embodiment of the double-chamber folding box according to the invention is one in which the inner surfaces each have a smaller longitudinal extension in a direction parallel to the fold lines than the side surfaces. This means that an enclosed leaflet, for example, can have a larger longitudinal extension than the double-chamber folding box and can also be bent at the top end for easier removal without denting the lid of the box.

In an advantageous further development of this embodiment, the upper and lower edges of the inner surfaces recede against the upper and lower edges of the side surfaces. As a result, the insertion tab of the bottom part of the

Do not place the box on the corresponding adhesive tab when assembling it.

It is also advantageous if the longitudinal dimension of the side surfaces in a direction parallel to the fold lines is chosen to be smaller than the corresponding longitudinal dimension of an item to be packed in the smaller inner chamber of the double-chamber folding box, in particular an information leaflet. This means that the item to be packed, usually an information leaflet that can be folded over, can be easily pulled out of the box and put back in later.

A particularly preferred embodiment of the double-chamber folding box according to the invention is one in which a continuous cutting line runs in a direction perpendicular to the folding lines over the entire transverse dimension of the inner surface adjacent to the adhesive flap and over part of the transverse dimension of the other inner surface. When the folding box is erected, this creates an "insertion barrier" at the height of the cutting line, so that the goods to be packed in the smaller inner chamber, such as information leaflets, sample bottles, etc., can protrude from the small additional chamber at the upper end or be flush with it, and can therefore be easily removed, even if the longitudinal dimension of the folding box is considerably larger than the longitudinal dimension of the goods to be packed.

A preferred development of this embodiment is one in which the fold lines between the adhesive flap and the adjacent inner surface and between the two inner surfaces are shifted parallel to the continuous cutting line in the direction of the side surfaces. This facilitates the formation of the inner additional

chamber, including the function of the "insert lock", when erecting the double-chamber folding box, so that erection can be carried out completely automatically.

In an advantageous further development, the parallel shifted folding lines each start from an end point of the continuous cutting line. This further optimizes the formation of the above-mentioned "insertion lock".

A further development is also preferred in which the parallel offset of the shifted fold line compared to the corresponding non-shifted fold line between the inner surfaces is approximately 25% to 50% of the transverse dimension of an inner surface. This ensures a defined stop for the by-product to be packaged in the additional chamber at a defined height.

Another preferred embodiment of the double-chamber folding box according to the invention is one in which, when the folding box is erected, the inner surface attached to a side surface forms an angle of at most 45°, preferably between 5° and 20°, with the side surface. By specifying the desired angle and the corresponding transverse extension of the inner surfaces, a wide variety of geometries can be realized for the additional chamber. In the preferred application for flat package inserts, an angle between 5° and 20° will be selected.

The scope of the present invention also includes a flat blank for a double-chamber folding box according to the invention of the type described above.

In the double-chamber folding box according to the invention, starting from the flat blank, the inner surfaces are bent around the fold line to the adjacent side surface by approximately 180° in the direction of the inside of the folding box, and the adhesive tab attached to the inner surfaces is glued to the inside of the side surface next to the inner surfaces.

In a preferred variant of the double-chamber folding box according to the invention, it is provided that the additional adhesive flap attached to a side surface is bent around the fold line to the adjacent side surface by approximately 180° in the direction of the inside of the folding box, that the side surface adjacent to the additional adhesive flap, together with at least one additional side surface adjacent to it, is bent around the corresponding fold line by approximately 180° in the direction of the later inside of the folding box, and that the additional adhesive flap is glued to the outside of an inner surface.

In this way, the double-chamber folding box according to the invention can be manufactured fully automatically, with the additional chamber inside forming automatically when the box is erected.

The double-chamber folding box according to the invention can be erected on a packaging machine starting from the flat, pre-glued folding box as it is produced after the above-mentioned steps.

Alternatively, the double-chamber folding box according to the invention can also be erected on a packaging machine starting from a flat blank.

A particularly preferred method variant is one in which the goods to be packaged, in particular an information leaflet, are placed in the smaller inner chamber before or after the adhesive tab attached to the inner surfaces is glued to a side surface before the double-chamber folding box is erected. By placing the information leaflet, a brochure, etc. in the flat state and thereby fixing it, any difficulties when inserting the additional goods into the resulting narrow pocket after the double-chamber folding box is erected are avoided.

Finally, another embodiment of the double-chamber folding box according to the invention is characterized in that there are no fold lines between the inner surfaces and the adhesive flap attached to it, so that the two inner surfaces together with the adhesive flap attached form a diagonal flap which, when erected, divides the interior of the folding box into two chambers of approximately equal size and is only glued to the other adhesive flap. This means that a completely different type of space division within the folding box can be achieved by a very simple modification of the cut, namely the omission of the above-mentioned fold lines.

Further advantages of the invention emerge from the description and the drawing. Likewise, the above-mentioned and further listed features can be used according to the invention individually or in groups in particular.

any combinations. The embodiments shown and described are not to be understood as an exhaustive list, but rather have an exemplary character for the description of the invention.

The invention is illustrated in the drawing and is explained in more detail using exemplary embodiments. They show:

Fig. 1 shows an embodiment of a blank according to the invention;

Fig. 2 shows a further embodiment of a blank according to the invention with a cutting line for an "insertion lock";

Fig. 3a shows a section through the blank according to Fig. 1 in a direction perpendicular to the fold lines during the process of pre-bending and pre-gluing the subsequent folding box from the blank;

Fig. 3b is a horizontal section as in Fig. 3a, but with the folding box in the erected state;

Fig. 4 is a schematic spatial representation of a folding box erected from the blank according to Fig. 1 ;

Fig. 5 a detail of a folding box erected from the blank according to Fig. 2 with a view of the additional chamber with "insertion lock";

Fig. 6 shows a blank according to the prior art;

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Fig. 7a shows a further embodiment of the blank according to the invention without fold lines between the inner surfaces and the adhesive flap; and

Fig. 7b is a three-dimensional representation of the folding box erected from the blank according to Fig. 7a.

The blank 10 according to the invention for a double-chamber folding box shown in Fig. 1 has four rectangular side surfaces 11a, 11b, lic and lld, each separated from one another by a fold line 12a, 12b, 12c. Two further surfaces 13a, 13b, separated from one another by a fold line 12e and located on the inside when the double-chamber folding box is erected, are attached to the side surface lld via a fold line 12d. An adhesive tab 14a is attached to the inside surface 13b via a fold line 12f.

Fig. 6 shows a flat blank according to the prior art, which also has four side surfaces 31a to 31d, two inner surfaces 33a and 33b and an adhesive flap 34a attached to the inner surface 33b. The fold lines 32a to 32f in Fig. 6 correspond to the fold lines 12a to 12f in Fig. 1. In addition, bottom and cover flaps are shown in Figs. 1 and 6 (as well as in Fig. 2), which are each attached to the side surfaces 11a to 11d and 31a to 31d via further fold lines running perpendicular to the fold lines 12a to 12f and 32a to 32f. However, since they are not of particular importance for the present invention, these bottom and cover flaps are not described in more detail below.

The blank 10 according to the invention in Fig. 1 differs from the blank 30 shown in Fig. 6 according to the prior art essentially in that the two inner surfaces 13a, 13b together have a transverse extension in the direction perpendicular to the fold lines 12a to 12d, which is between 100% and 150%, in the example shown at 115% of the transverse extension of the second surface 11d adjacent to the inner surface 13a, while the sum of the transverse extensions of the inner surfaces 33a and 33b is approximately twice the adjacent side surface 31d.

Furthermore, in the blank 10, the largest transverse dimension of one of the inner surfaces, namely that of the surface 13b, is approximately 65% of the transverse dimension of the adjacent side surface 11d, while in the blank 30 the ratio of the transverse dimension of the inner surface 33a to the transverse dimension of the adjacent second surface 11d is approximately 110%.

Another significant difference from the blank 30 according to Fig. 6 is a further adhesive tab 14b, which is attached to the side surface 11a of the blank 10 via a fold line 12g.

To improve the insertion behavior, the upper edges 15a, 15b and also the lower edges 16a, 16b of the inner surfaces 13a, 13b are recessed against the upper and lower edges of the side surfaces 11a to 11d.

The blank 20 according to the invention in Fig. 2 differs from the blank 10 according to Fig. 1 due to a cutting line 27 which is in a direction perpendicular to the

Fold lines 12a to 12d run through the entire transverse extent of the inner surface 23b adjacent to the adhesive flap 24a as well as part of the transverse extent of the further inner surface 23a. In addition, the fold lines 22e' and 22f' between the two inner surfaces 23a and 23b as well as between the adhesive flap 24a and the adjacent inner surface 23b below the cutting line 27 are shifted parallel in the direction of the side surface 11d, while the non-shifted sections 22e, 22f of the corresponding fold lines run in the same way as the fold lines 12e and 12f in the blank 10 in Fig. 1. In addition, the fold lines 22e' and 22f each start from an end point of the continuous cutting line 27, which is particularly advantageous in terms of production technology. The parallel offset of the shifted folding lines 22e' and 22f■ compared to the corresponding unshifted folding lines 22e and 22f is approximately 40% and 20% of the maximum transverse extent of the inner surface 23a. Due to this geometry, an "insertion lock" is automatically formed in the additional chamber when the double-chamber folding box is erected from the blank 20.

In Fig. 3a, the erection process of the blank 10 according to Fig. 1 is shown schematically in its first phase. Starting from the flat blank 10, the inner surfaces 13a, 13b are bent around the fold line 12d by approx. 180° in the direction of the later inside of the folding box and the adhesive flap 14a attached to the inner surface 13b is glued to the inside of the side surface lic that follows the inner surface 13a. The further adhesive flap 14b is then bent around the fold line 12g by approx. 180° in the direction of the later inside of the adjacent side surface 11a, the side surfaces 11a and 11b are folded together around the

The fold line 12b is also bent approximately 180° towards the later inside of the folding box and the further adhesive flap 14b is glued to the outside of the inner surface 13a. In this way, a flat, pre-glued folding box is created, from which the actual double-chamber folding box can be erected, preferably automatically on a packaging machine.

Fig. 3b shows a cross-section through a double-chamber folding box according to the invention in the erected state. The inner surfaces 13a and 13b and the side surface 11d enclose a small inner additional chamber with a triangular cross-section. It can also be clearly seen that by gluing the further adhesive flap 14b to the inner surface 13a at the corresponding edge between the side surfaces 11a and 11d, no open cut edge is created, in contrast to the usual solution according to the prior art.

In Fig. 4, an embodiment of the double-chamber folding box according to the invention is shown schematically in three dimensions. It is shown how an information leaflet 18 can be easily inserted into the additional chamber of the double-chamber folding box described above in the direction of the thick arrow and removed again in the opposite direction of the arrow. As an additional visual aid and to make it easier to pull out, the information leaflet 18 can be bent in its upper part in the direction of the curved small arrow. Since the upper edges 15a, 15b of the inner surfaces 13a and 13b recede from the upper edges of the side surfaces 11a to 11d, there is space between the bent part of the information leaflet 18 and the lid even when it is closed.

enough space to prevent the lid of the folding box from bulging.

Fig. 5 shows in detail the operation of the "insertion lock" created with the help of the continuous cutting line 27. When the folding box is erected from a blank according to Fig. 2, this geometric design of the inner additional chamber is created completely automatically due to the continuous cut 27 and the correspondingly offset folding lines 22e' and 22f'. A leaflet 28 is shown in dashed lines, which is inserted into the inner additional chamber according to Fig. 5. Since the leaflet 28 has a significantly smaller longitudinal extension than the side surface 11d, it would slide down to the bottom of the box without the "insertion lock" and from there it would be very difficult to pull it out again.

Finally, Figs. 7a and 7b show a further variant in which the inner surfaces are not separated from each other and from the attached adhesive flap by fold lines, but together with the attached flap form a diagonal flap 73. In the spatial representation of Fig. 7b it can be seen that in the erected state of the double-chamber folding box in this variant only one bonding takes place, namely between the adhesive flap 14b and the diagonal flap 73, which together with the side surfaces 11a and 11b forms a first half-space and with the side surfaces lic and lld a second half-space within the folding box.

Claims (13)

Protection claims 1. Double-chamber folding box, which is erected from a flat, pre-glued folding box or a flat blank (10; 20), the blank (10; 20) of the double-chamber folding box having at least four rectangular side surfaces (11a, 11b, lic, lld) each separated from one another by a fold line (12a, 12b, 12c), to which two further surfaces (13a, 13b; 23a, 23b) are connected at one end via a fold line (12d), separated from one another by a fold line (12e; 22e, 22e') and located inside the double-chamber folding box in the erected state, as well as an inner surface (13b; 23b) which is further away from the side surfaces (11a, 11b, lic, lld) via a fold line (12f; 22f, 22f) attached adhesive tab (14a; 24a), characterized, that the two inner surfaces (13a, 13b; 23a, 23b) together have a transverse extension in a direction perpendicular to the fold lines (12a, ..., 12d) which is at least 100%, at most 150%, preferably between 105% and 120% of the transverse extension of the side surface (11d) adjacent to the inner surfaces (13a, 13b; 23a, 23b), that the largest transverse dimension of one of the inner surfaces (13a, 13b; 23a, 23b) is at most 90%, preferably at most 60% of the transverse dimension of the side surface (lld) adjacent to the inner surfaces (13a, 13b; 23a, 23b), and that on the side of the blank (10; 20) opposite the inner surfaces (13a, 13b; 23a, 23b), a further adhesive tab (14b) is attached to the corresponding side surface (11a) via a fold line (12g). 2. Double-chamber folding box according to claim 1, characterized in that the inner surfaces (13a, 13b; 23a, 23b) each have a smaller longitudinal extent in a direction parallel to the fold lines (12a, ..., 12d) than the side surfaces (Ha, . . . , lld). 3. Double-chamber folding box according to claim 2, characterized in that the upper and lower edges (15a, 15b, 16a, 16b) of the inner surfaces (13a, 13b; 23a, 23b) each recede towards the upper and lower edges of the side surfaces (11a, ..., 11d). 4. Double-chamber folding box according to one of the preceding claims, characterized in that the longitudinal extent of the side surfaces (Ha, . . . , lld) in a direction parallel to the fold lines (12a, ..., 12d) is selected to be smaller than the corresponding longitudinal extent of a good to be packed in the smaller inner chamber of the double-chamber folding box, in particular of an information leaflet (18; 28). 5. Double-chamber folding box according to one of the preceding claims, characterized in that a continuous cutting line (27) in a direction perpendicular to the folding lines (12a, ..., 12d) over the entire transverse extent of the inner surface (23b) adjacent to the adhesive flap (24a) as well as over a part the transverse extension of the further inner surface (23a). 6. Double-chamber folding box according to claim 5, characterized in that the folding lines (22f', 22e') between the adhesive flap (24a) and the adjacent inner surface (23b) and between the two inner surfaces (23a, 23b) on one side of the continuous cutting line (27) are displaced parallel in the direction of the side surfaces (11a, ..., 11d). 7. Double-chamber folding box according to claim 6, characterized in that the parallel shifted folding lines (22e', 22f) each start from an end point of the continuous cutting line (27). 8. Double-chamber folding box according to one of claims 5 to 7, characterized in that the parallel offset of the displaced (22e', 22f) compared to the corresponding undisplaced (22e, 22f) folding line between the inner surfaces (23a, 23b) is approximately 25% to 50% of the transverse extent of an inner surface (23a, 23b). 9. Double-chamber folding box according to one of the preceding claims, characterized in that in the erected state of the folding box, the inner surface (13a; 23a) adjoining a side surface (11d) encloses an angle of at most 45°, preferably between 5° and 20°, with this side surface (11d). •*■ •■ · 10. Double-chamber folding box according to one of the preceding claims, characterized in that starting from the flat blank (10; 20), the inner surfaces (13a, 13b; 23a, 23b) are bent around the fold line (12d) to the adjacent side surface (lld) by approximately 180° in the direction of the inside of the folding box, and that the adhesive tab (14a; 24a) attached to the inner surfaces (13a, 13b; 23a, 23b) is glued to the inside of the side surface (lic) following the inner surfaces (13a, 13b; 23a, 23b). 11. Double-chamber folding box according to claim 10, characterized in that the further adhesive flap (14b) attached to a side surface (11a) is bent around the fold line (12g) to the adjacent side surface (Ha) by approximately 180° in the direction of the inside of the folding box, that the side surface (Ha) adjacent to the further adhesive flap (14b) together with at least one further side surface (Hb) adjacent to it is bent around the corresponding fold line (12b) by approximately 180° in the direction of the later inside of the folding box, and that the further adhesive flap (14b) is glued to the outside of the inner surface (13a; 23a). 12. Double-chamber folding box according to one of claims 1 to 4, characterized in that no folding lines are provided between the inner surfaces and the adhesive flap attached thereto, so that the two inner surfaces together with the adhesive flap attached thereto form a diagonal flap (73) which, in the erected state, encloses the interior of the Folding box is divided into two approximately equal-sized chambers and is only glued together with the additional adhesive flap (14b). 13. Flat blank (10; 20; 70) for a double-chamber folding box according to one of the preceding claims.