Untitled record

The present invention relates to a blank for a cuboid folding box open at the top with four adjoining walls separated from one another by folding grooves, namely a front wall, a rear wall and two side walls to which - separated by a folding groove - a first, a second, a third and a fourth flap to form one

Connect the bottom, wherein the front wall is designed lower than the rear wall and wherein the first flap or the second flap has a flap - separated by a folding groove - which can be glued to the second flap or first flap after appropriate folding, and the third flap or the fourth flap has a flap which is separated by a folding groove and which, after appropriate folding, can be glued to the fourth flap or third flap.

While the box is still being manufactured, the flaps are folded onto the walls and the flaps are folded back onto the corresponding flaps. The walls are then provided with glue, and the two edge-side walls together with the associated flaps are knocked onto the adjacent walls or flaps, so that the flaps are glued to the adjacent flaps. This takes place automatically in a so-called folder gluer.

Such folding boxes are known and have a so-called lightning base, because this opens up by itself in a flash when the folded box is unfolded. (The bottom is formed by the four flaps.)

These folding boxes are used, for example, in supermarkets for the display of goods packed in boxes, for example.

By using such boxes, it is possible to place products in packaging units, for example 10 individual packages of a product, on a sales shelf at once. Most customers prefer a lower front wall for such folding boxes because the product is more visible and therefore easier to recognize. Another advantage of the low

Front wall is that products can be removed more easily. In the manufacture of such folding boxes, however, the problem arises that during the last fold (after the adhesive has been applied) the fold groove between the low front wall and the adjacent side wall is too short to obtain a straight fold normal to the side edge when the Automatically folded.

The aim of the invention is to create a blank for a folding box with a low front wall that can be automatically and precisely folded.

This object is achieved according to the invention by a folding box of the type mentioned at the outset in that the flap adjoining the front wall is connected to the flap of the adjacent flap via a web, or the flap of the flap adjoining the front wall is connected to the adjacent flap via a web, that the web in the extension of the folding groove between the front wall and the adjacent side wall also has a folding groove and that a recess is provided between these two folding ribs Length is greater than the height of the front wall.

As already stated above, the flaps, which form the bottom of the finished box, are folded up towards the inside of the walls. The folding groove in the web connecting the two flaps then represents an extension of the folding groove between the front wall and the side wall, which is necessary for exact folding. A recess is necessary between the two flaps, the length of which is greater than the height of the front wall. Otherwise, when folding, the folding groove of the web would coincide with the folding groove between the front wall and the adjacent side wall, ie there would be a deformation of the material. Due to the web lying in one plane with the front wall, the fold edge of the front wall that is too short is lengthened so far that an exact right-angled fold of the corner edge occurs

AT 413 206 Β a folder gluer can be executed.

It is advantageous if the flap adjoining the web and the flap adjoining the web each have a folding groove which runs obliquely from the recess in the direction of the associated flap and is symmetrical to the folding groove in the web.

These additional folding grooves make it easier to unfold the box from the folded state, since the web through the folding groove can more easily get past the corresponding wall while the bottom is being pressed down, because it can be bent up a little. By bending the web upwards, it does not touch the directly adjacent wall as much. It is possible that the folding groove of the flap coincides with the folding groove that separates the flap from the associated flap.

According to one embodiment of the invention, it is provided that the flap adjoining the front wall is also connected to the flap adjoining the other adjacent side wall via a second web The side wall also has a folding groove and that a recess is provided between these two folding grooves, whose length is greater than the height of the front wall.

This means that the flap of the front wall is connected to the two adjacent flaps via a web of the same type. This makes it easier to fold the blank, as the three connected flaps can be folded inwards at the same time.

In this embodiment, it is expedient that the flap adjoining the front wall has a folding groove which runs obliquely from the second recess in the direction of the flap, whereby - if this folding groove intersects the other folding groove - an incision is provided up to the free edge of the flap is. In this way, the front panel can be bent independently around two folding grooves, which makes it easier to unfold.

It is also advantageous if a flap adjoining a wall has a length and a width which corresponds approximately to the length and the width of the folding box in order to form a continuous base. The one-piece design of a flap with the dimensions of the folding box gives a flat base.

Finally, it is useful if the rear wall is made in two parts, if one part of the rear wall is connected to a side wall and the two parts overlap and are glued to one another. This ensures that the folded blank can be aligned with parallel jaws after gluing in the folding box gluing machine, even if the flap forming the bottom is higher than the side wall.

An exemplary embodiment of the subject matter of the invention is shown in the accompanying drawings. Fig. 1 shows a view from the outside of a corrugated cardboard blank for a folding box open at the top, Fig. 2 shows a plan view of an unfolded box with the flaps of the bottom overlapping, Fig. 3 shows a blank for a folding box with three connected flaps and a continuous bottom , Fig. 4th a blank for a folding box, the length of the folding box being greater than its height and FIG. 5 the blank from FIG. 4 during the gluing of a split rear wall, for example in a folding box gluing machine.

As can be seen from FIG. 1, the blank according to the invention has a rear wall 1, a side wall 2, a front wall 3, a side wall 4 and an adhesive flap 5 adjoining it. The walls are separated from one another by folding grooves, for example the front wall 3 is separated from the side wall 4 by a folding groove 22 and from the side wall 2 by a

Folding groove 122.

AT 413 206 B

A flap 6 separated by a folding groove 16 adjoins the rear wall 1, a flap 8 separated by a folding groove 17 on the side wall 2 and a flap 7 separated by a folding groove 7 on the side wall 2

Flap 9, a flap 11 separated by a folding groove 20 on the side wall 4 and a flap 10 separated by a folding groove 21 on it. The flap 10 is connected to the flap 9 via a web 12. The web 12 has a folding groove 14, the folding groove 14 running in the extension of the folding groove 22, which is located between the front wall 3 and the side wall 4. The two dotted lines 23, 24 indicate the border between the tab 10 and the flap 9 and the web 12. According to the prior art, the flap 10 or the flap 9 ends at these lines 23, 24. According to the invention, the web 12 adjoins the flap 10 or the flap 9 directly (without a folding groove). The lines 23, 24 are therefore not visible on the blank according to the invention. The flap 10 and the flap 9 are glued together, as is the case with the flap 6 and the flap 7.

In order to glue the folding box together, the flaps 6, 8, 9, 11 adjoining the walls 1, 2, 3, 4 are first bent in the direction of the inside of the walls 1, 2, 3, 4 and pressed on. Then the flap 7 is bent back around the folding groove 18 onto the flap 8 and the flap 6 and / or the flap 7 and the flap 10 or the web 12 or the flap 9 and the lateral outer edge of the rear wall 1 on the inside over the Width of the glue line 20 see 5 coated with glue. The side wall 4 together with the flap 11 is then folded around the folding grooves 22 and 14 onto the front wall 3 together with the flap 9. Since the two folding grooves 22 and 14 together are relatively long, this folding takes place exactly at an angle. Likewise, the rear wall 1 including the flap 6 is folded onto the side wall 2 including the flap 8. Here the folding groove is automatically long enough because the rear wall 1 has a correspondingly large height. The flap 10 coated with adhesive is now pressed together with the flap 9 adjacent to the folding groove 14 in order to glue the flap 10 to the flap 9. The front wall 3 now lies exactly on the side wall 4.

While the side wall 4 and the front wall 3 are being pressed together, a glued-together double flap 15, which consists of the web 12, stretches out at a distance over the sloping upper side edge of the side wall 4 sloping forward in the direction of the folding groove 22. This is possible because there is a recess 13 in the blank. The length of the recess 13, which is surrounded by the flaps 9 and 11, the web 12 and the tab 10, is greater than the length of the folding groove 22.

The folding groove 14 now forms a common edge with the short folding groove 22 or the corner edge between the front wall 3 and the side wall 4, ie they lie on a straight line. This extended edge gives the two walls 3, 4 a guide for the exact folding of the common short corner edge.

As already mentioned, the rear wall 1 is bent in the direction of the side wall 2 and compressed. As a result, the outside of the flap 6 coated with adhesive is pressed onto the inside of the flap 7. When gluing the adhesive flap 5 to the rear wall 1, the adhesive flap 5 lies under the edge of the rear wall 1. The one that has already been coated with adhesive

The area of ​​the outer edge of the rear wall 1 is pressed onto the adhesive flap 5 and glued. The finished, flat folded box does not take up much space and is now ready for delivery to a customer. The customer only has to squeeze the folded box at the outer edges in order to stretch the box into its final shape, as is known. The Klap50 pen 6, 8, 9 and 11, which form the bottom, interlock as shown in FIG. Due to the additional folding grooves 25, 26, the double flap 15 sliding along the side wall 4 can bend back somewhat and does not wedge or wedge itself with the side wall 4 when the folding box is opened are packed, ready.

AT 413 206 Β

Fig. 3 shows a variant of a blank for a folding box. There is not only the web 12, but also a web 112 which connects the flap 9 of the front wall 3 to the flap 8 of the other side wall 2. All three flaps 11, 9 and 8 are thus connected to one another, which facilitates the further folding process, in particular the folding up of the flaps 11, 9 and 8 forming the bottom: since these are now connected, they can be folded together.

Another difference is that here a folding groove 25 'is provided which is symmetrical to the folding groove 21 (with respect to the folding groove 14). The folding groove 21 thus simultaneously also fulfills the function of the folding groove 26 of FIG. 1.

The flap 9 also has a folding groove 225. This lies symmetrically (with respect to the folding groove 114) to the folding groove 226, which separates the web 112 from the flap 8. The two folding grooves 25 'and 225 intersect one another. So that the flap 9 can be bent independently around both folding grooves 25 ', 225, a cut 227 is provided which runs from the point of intersection of the two folding grooves 25' and 225 to the free edge of the flap 9.

Furthermore, the flap 9 adjoining the front wall 3 has approximately the length of the side walls 2, 4. As a result, when the box is opened, a level base is formed, which makes it easier to place and remove the goods. While the folding box is being opened, a bottom locking tab 28 rests on the flap 11 and under the flap 9. The floor locking tab 28 reinforces the floor structure and prevents the flaps forming the floor from being pushed down when a load is applied.

A material-saving embodiment of the folding box is described with the aid of the dotted line 27. If the cut is made along this line, that is to say along the extended cut edge of the webs 12 and 112, a considerable amount of material can be saved. In this case, however, the folding box does not have a flat bottom.

Fig. 4 shows a blank for a folding box, the bottom-forming flap 9 of which is longer than the rear wall 1 is high.

As FIG. 5 shows, folding boxes are aligned between two parallel jaws 29, 30 for straight gluing in the folding box gluing machine after gluing. Folding boxes according to FIG. 1 are usually glued to the corner edge between the rear wall 1 and the side wall 4 by means of an adhesive flap 5. However, if one were to use the geometry of the folding box of FIGS. 4 and 5 instead of the bottom part 1b analogous to FIG. 1 3 and 3 provide an adhesive flap 5, the connection would come into an area where the flap 9 protrudes so that the jaws 29, 30 cannot fix the connection between the rear wall 1 and the adhesive flap 5 there.

For this reason, the rear wall is divided into two parts in this example: the parts 1a and 1b together form the rear wall. However, only the part 1a carries the tab 6. This displaces the glue point (to the right as seen in FIG. 5). In this area of ​​the adhesive edge 32, the jaws 29, 30 can be brought up to align with the walls 1a, 1b without hindrance.

In order to create a bottom that rises obliquely to the rear wall in the rear area of ​​the folding box for better product presentation, e.g. for bagged goods, the flap 9 is made longer than the adjacent side walls 2, 4 and has an additional folding groove 31.