Packing carton and related machine and method

Abstract

A packing carton for packing pouch-type beverage containers stands on two sides, referred to as bottom surfaces, while in the open state and comprises halves which are open at their respective tops. Each bottom surface is delimited on four sides by carton sides, and the halves have a common longitudinal side, which is bent in the middle when in the open state, and comprises stiffening flaps on the transverse sides. The stiffening flaps are extensions on the transverse sides. A machine for closing such a packing carton is also disclosed, as well as a related method for closing the packing carton.

Claims

1. A machine for assembling a packing carton comprising two halves, each half comprising a bottom surface, an inner longitudinal side, an outer longitudinal side, and two transverse sides, the two bottom surfaces connected by a common longitudinal side which is bent in the middle when the packing carton is in an open state to form the inner longitudinal side of each half, each longitudinal side comprising two flaps which are extensions of the longitudinal side and configured to be fixed to adjacent transverse sides, and each transverse side comprising a stiffening flap which is an extension of the transverse side and comprises an inner side and an outer side, the machine comprising: a feeding device configured to convey the packing carton through the machine; at least one first folding device configured to fold the stiffening flaps positioned in the front of the packing carton with respect to a direction of movement of the packing carton towards the interior of the packing carton during conveyance of the packing carton so that the inner sides face the bottom surface of the corresponding half, wherein the first folding device comprises two wedges which are tapered in the front, so that the folding of the stiffening flaps is carried out gradually, and wherein the wedges are configured to keep the stiffening flaps positioned in front with respect to the direction of movement pressed down at the positions where the wedges lie on the stiffening flaps while the packing carton is conveyed further; at least one rotatably mounted, driven plate or bow, which is configured to pivot to fold the stiffening flaps positioned in the rear of the packing carton with respect to the direction of movement of the packing carton towards the interior of the packing carton, and is further configured to rotate underneath the tapered portion of the wedges, so that the stiffening flaps positioned in the rear with respect to the direction of movement are first bent and stabilized by the plate or bow, and are then kept down by the wedges; at least one folding aid configured to fold the halves of the packing carton into a position in which the bottom surfaces of the halves of the packing carton enclose an angle between 450 and 135; at least one second folding device configured to press at least a portion of the packing carton against a flat side of the wedges so that the stiffening flaps are positioned substantially parallel to the bottom surfaces of the packing carton; and at least one movable nozzle configured to apply a closing agent to the outer sides of at least two stiffening flaps positioned on different transverse sides.

2. The machine according to claim 1, wherein the at least one nozzle is configured to apply the closing agent to the stiffening flaps in a direction from the inner longitudinal side to the outer longitudinal side.

3. The machine according to claim 1, further comprising an additional nozzle configured to apply a closing agent to at least one outer longitudinal side of the packing carton.

4. The machine according to claim 3, further comprising a pressing device configured to apply pressure to the packing carton to distribute the closing agent between the outer longitudinal sides.

5. The machine according to claim 1, wherein the at least one folding aid comprises two folding aids configured to fold the halves of the packing carton into a position in which the bottom surfaces of the halves of the packing carton enclose an angle of about 90.

6. The machine according to claim 1, wherein the at least one second folding device comprises two plates movable horizontally towards each other to press the packing carton against the wedges.

7. The machine according to claim 1, further comprising at least two horizontally movable plates configured to press the halves of the packing carton together to close the packing carton so that the stiffening flaps project into the interior of the packing carton and the outer sides of the stiffening flaps on the different halves of the packing carton rest against each other and are coupled to each other by the closing agent.

8. The machine according to claim 1, wherein the at least one first folding device and the at least one nozzle are positioned in respective successive stations with respect to the feeding device.

9. A method for assembling a packing carton comprising two halves, each half comprising a bottom surface, an inner longitudinal side, an outer longitudinal side, and two transverse sides, the two bottom surfaces connected by a common longitudinal side which is bent in the middle when the packing carton is in an open state to form the inner longitudinal side of each half, each longitudinal side comprising two flaps which are extensions of the longitudinal side and configured to be fixed to adjacent transverse sides, and each transverse side comprising a stiffening flap which is an extension of the transverse side and comprises an inner side and an outer side, the method comprising: folding the flaps on the longitudinal sides toward the interior of the packing carton, and fixing each longitudinal side flap to the inside of the adjacent transverse side; folding the stiffening flaps positioned in the front of the packing carton with respect to a direction of movement of the packing carton towards the interior of the packing carton so that the inner sides face the bottom surface of the corresponding half; folding the stiffening flaps positioned in the rear of the packing carton with respect to the direction of movement of the packing carton towards the interior of the packing carton so that the inner sides face the bottom surface of the corresponding half; folding the halves of the packing carton towards each other so that the bottom surfaces of the halves of the packing carton enclose an angle between 45 and 135; pressing at least a portion of the packing carton against one or more folding devices so that the stiffening flaps are positioned substantially parallel to the bottom surfaces of the packing carton; applying a closing agent to the outer sides of at least two stiffening flaps positioned on different transverse sides; and closing together the halves of the packing carton so that the outer sides of the stiffening flaps having the closing agent and outer sides of corresponding stiffening flaps on the other half of the packing carton are coupled to each other by the closing agent.

10. The method according to claim 9, further comprising applying a closing agent to at least one outer longitudinal side of the packing carton.

11. The method according to claim 10, further comprising applying pressure to the packing carton to distribute the closing agent between the outer longitudinal sides.

12. The method according to claim 9, further comprising at least one of the following steps: filling the halves of the packing carton; conveying a filled packing carton into a folding machine; conveying the packing carton into an intermediate station of a folding machine, during which the stiffening flaps are folded over, and wherein the halves are open in the intermediate station; conveying the packing carton into a closing station of a folding machine in which the packing carton is closed.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Other embodiments will be explained by means of the figures. In the figures:

(2) FIG. 1 shows an embodiment of a packing carton in an open state;

(3) FIGS. 2a and 2b show an embodiment of a packing carton according to the invention in the closed state;

(4) FIGS. 3a-3c show various steps of an embodiment of a method and related machine according to the invention;

(5) FIGS. 4a-4d show further steps of an embodiment of the method and related machine according to the invention;

(6) FIGS. 5a and 5b show further steps of an embodiment of the method and related machine according to the invention;

(7) FIG. 6 illustrates execution of the method steps; and

(8) FIG. 7 shows portions of an embodiment of a machine according to the invention.

(9) FIG. 8 shows portions of an embodiment of a machine according to the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(10) FIG. 1 shows an embodiment of a packing carton 1 in an open state. When the packing carton 1 is in the open state it comprises two halves 3a and 3b which stand on bottom surfaces 2. The two halves 3a and 3b are connected by one common longitudinal side 4, which is bent in the middle while in the open state. This embodiment of a packing carton 1 further comprises two longitudinal sides 7. In this embodiment, a closing side 6 is provided on a longitudinal side 7 of the packing carton as an extension of the longitudinal side 7. Other embodiments may also be formed without a closing side 6 (not shown). The packing carton 1 further comprises four transverse sides 8 in whose extensions the stiffening flaps 5 are provided in this example. In other embodiments it is also possible, however, that both the closing side 6 and the stiffening flaps 5 of such an embodiment are provided only on portions of the longitudinal side 7 or the transverse sides 8 (not shown). Also, embodiments where closing sides 6 are provided on portions of both longitudinal sides 7 are possible within the limits of the invention claimed (not shown). The stiffening flaps 5 comprise two sides, of which one points away from the packing carton in the upwardly oriented state and is referred to as outside, while the other points to the packing carton half and, therefore, is referred to as inside. The stiffening flaps 5 can be folded in the direction of the interior of the carton 1.

(11) The fixing of the longitudinal sides 7 to the transverse sides 8 may be realized, for example, by flaps 9. In this case, the flaps 9 are fixed to the transverse sides 8 by a closing agent and represent bent extensions of the longitudinal sides 7. But also a fixing of flaps that represent an extension of the transverse sides 8 and are connected to the longitudinal sides 7 is possible in other embodiments. Mixing the embodiments is possible, too. The connection of the longitudinal sides 7 and the transverse sides 8 by means of flaps 9 may provide the carton 1 with additional stability. Embodiments where the packing carton 1 is folded from other basic shapes are possible as well, for example, where the packing carton 1 has a double layer on portions of sides or on entire sides (not shown).

(12) As can be seen in FIG. 1, both halves 3a, 3b of packing carton 1 according to the invention may be filled with containers. The two halves 3a, 3b have an approximately identical volume to be filled, which may be defined, for example, by a product of the bottom surface 2 and the height of half of the common longitudinal side 4. In this example, the height of the common longitudinal side 4 may be defined, for example, by the shortest connection from the bottom side to the bent edge in the middle of the common longitudinal side 4.

(13) The carton 1 according to an embodiment of the invention may be made of any material having sufficient stability. As the stiffening flaps provide additional stability to the closed packing carton during stacking or transport, the packing carton material may also comprise solid board in addition to or instead of corrugated cardboard. Also, these materials may comprise additional elements, such as tear threads or plastic reinforcements. In some embodiments each packing carton side comprises a layer of solid board. In other embodiments one or more sides or side parts are reinforced by another layer of the same or another material. In some embodiments the bottom sides may be reinforced by an insert of a reinforcing material, which may include the same material as the packing carton material or another material.

(14) FIG. 2 shows an embodiment of a packing carton 1 according to the invention in the closed position.

(15) FIG. 2a thereof shows a cross-section of the closed packing carton parallel to the longitudinal sides 7. It can be seen that the stiffening flaps 5 of this example, in the closed state, project into the interior of the packing carton and that two stiffening flaps contact each other on their outer sides. The stiffening flaps 5 are oriented to the transverse sides 8 approximately at a right angle. They provide the closed packing carton with the necessary stability for transport and stackability. The transverse sides 8 are shown at the top of this illustration, while the bottom surface 2 is now located at the side. Based on the symmetry it can be seen why the fillable volume of the packing carton 1 is twice as large as the fillable volume of one half 3a, 3b.

(16) FIG. 2b shows a closed packing carton, with a vertical top view of the longitudinal sides 7, with the closing side 6 which is provided in some embodiments. In this example, the closing side 6 is slightly shorter than the longitudinal side 7 in order not to wholly cover the longitudinal side 7 lying underneath thereof in the closed state. In other embodiments the closing side 6 may also wholly cover the longitudinal side 7 lying underneath it (not shown). The closing side 6 rests with its inside on the outside of the longitudinal side 7, of which it does not constitute an extension in the open state.

(17) FIGS. 3a-3c show various steps of an embodiment of the method according to the invention, in this example using an embodiment of a machine according to the invention and a packing carton according to an embodiment of the invention.

(18) FIG. 3a shows a step of folding the stiffening flaps 5 placed in the front with respect to the direction of movement of packing carton 1. In the example shown, this folding is accomplished by two pre-folding devices 10 which are configured as pre-folding wedges 10. The pre-folding wedges 10 may, in this case, be tapered in the front, so that the folding of the stiffening flaps 5 is carried out gradually. Thus, damage to the stiffening flaps 5 during the folding step is prevented.

(19) FIG. 3b shows a step during further transport of the packing carton 1, after the folding of the front stiffening flaps 5, in the same machine as shown in FIG. 3a. While the two pre-folding wedges 10 of this example keep the stiffening flaps 5, which are positioned in front with respect to the direction of movement, pressed down at the positions where the pre-folding devices 10, which in this example are configured as pre-folding wedges 10, lie on the stiffening flaps 5, the packing, which, in this example, is illustrated as an embodiment of a carton 1 according to the invention, is conveyed further. This conveyance is realized, for example, by a feeding device 19. It can be seen in FIG. 3b that, in this example, the closing side 6 is not folded over by the two pre-folding devices 10.

(20) FIG. 3c shows a possible arrangement of an auxiliary means 14 of a machine according to an embodiment of the invention, which is configured to fold the stiffening flaps 5, which are positioned in the rear with respect to the direction of movement, towards the inside of the packing carton. FIG. 3c shows another embodiment of a packing carton 1 according to the invention, which has the closing side 6 on the other outer longitudinal side, as compared to the cartons of FIGS. 3a and 3b. The step of folding over the stiffening flaps 5 placed in the rear, which are shown as still being upright in FIG. 3c, may also be carried out in embodiments of a packing carton according to the invention, however, that do not have a closing side 6 or have a closing side 6 on the other longitudinal side 7. By pivoting the movable auxiliary means 14, which may be configured in the form of a rotatably mounted, driven plate or bow, like in this example, the rear stiffening flaps are folded over into the interior of the packing carton. Advantageously, the plate may be arranged such that it can be rotated to arrive underneath the tapered portion of the pre-folding device 10, so that the stiffening flaps 5 placed in the rear with respect to the direction of movement are first bent and stabilized by the auxiliary means 14, and are then kept down by the pre-folding devices 10.

(21) The auxiliary means 14 may be movable in several directions. For example, there also exists an embodiment in which the auxiliary means 14 is configured as an obliquely mounted plate or wedge which may be rotatable, on the one hand, and wherein the inclination of the plate/wedge is, on the other hand, such that in some embodiments this auxiliary means can be arranged during the transport of the packing carton into the machine in a position in which it is capable of pre-breaking the front stiffening flaps, and in which the auxiliary means 14 can be moved in the continued operation by rotation or the like such that it is capable of folding over the rear stiffening flaps.

(22) After the stiffening flaps 5 placed in the rear with respect to the direction of movement have been folded over by auxiliary means 14, they may also arrive underneath the pre-folding devices 10 because they are located at the same height as the stiffening flaps 5 that are placed in the front with respect to the direction of movement and are folded over by the pre-folding devices 10. Thus, the packing carton can be conveyed further in the machine, even underneath the pre-folding devices. For example, in the case where the pre-folding devices 10 are also configured as folding devices, a position can thus be obtained which corresponds to the position shown in FIGS. 4a-4d and in which the steps shown in FIGS. 4a-4d can be carried out. As soon as the folded stiffening flaps 5 positioned in the rear with respect to the direction of transport have been conveyed to arrive underneath the pre-folding devices 10, they may also be stabilized by the pre-folding devices 10 in their folded position.

(23) FIGS. 4a-4d show various steps of an embodiment of the method using a machine, in this example a machine according to an embodiment of the invention, and a packing carton, in this example represented by a packing carton according to an embodiment of the invention. During the steps illustrated in FIGS. 4a, 4b and 4c, the folding devices which, in this example, are configured as pre-folding wedges 10, are advantageously always in contact with the stiffening flaps 5 in at least one area such that they stabilize the stiffening flaps 5 approximately parallel to the bottom surface 2 of the packing carton.

(24) FIG. 4a shows the packing carton, the two halves of which have already been folded such that they enclose an angle of approximately 90, or between 75 and 105 or between 45 and 135. Two folding aids 11 are visible, which stabilize the packing carton in its position. On the upper side of the packing carton there are provided two folding devices configured, in this example, as pre-folding wedges 10. Preferably, the stiffening flaps 5 are here stabilized by the lower tips of the folding device which is configured as a pre-folding wedge 10.

(25) FIG. 4b shows two plates 12, which can be moved horizontally towards each other and which, in FIG. 4c, press the two halves of the packing carton against a flat side of the pre-folding wedges 10. In doing so, the stiffening flaps 5 are oriented approximately parallel to the bottom surfaces 2. Preferably, they are pressed against the respective sides of the pre-folding wedges 10 along the entire length, whereby the area in which the folding device contacts the packing carton may change.

(26) FIG. 4d shows the packing carton in the closed position. For this purpose the packing carton, in this case a packing carton according to the invention, has been conveyed further after the step shown in FIG. 4c either to a next station, which may, for example, be referred to as a closing station, so that the folding device(s), which is/are configured as pre-folding wedges 10 in this example, does/do not prevent the packing carton from being closed. Alternatively, the folding device(s) may have been removed. To this end, the folding devices may be mounted, for example, to be movable vertically or horizontally. The step of conveying the packing carton further into a next station or of removing the folding device(s) may be part of some embodiments of a method, and may be carried out by a correspondingly configured portion of a machine according to the invention.

(27) For closing the packing carton, the packing carton is, in this example, pressed together by two horizontally movable plates 18, whereby the stiffening flaps 5 rest in the interior of the packing carton (see for example FIG. 2). Equally shown is the pressing device 13, which may be optionally provided in a machine according to the invention, which may be movable vertically and which may generate pressure from above by plate 13 after the packing carton was closed, so as to distribute a closing agent by means of pressure and bring it into good contact with the longitudinal side 7 and the closing side 6.

(28) After the method step shown in FIG. 4d, the packing carton may be conveyed out of the machine according to an embodiment of the invention (not shown).

(29) FIG. 5 shows a step of applying a closing agent to the outer side of two stiffening flaps 5 on a packing carton half 3b. In other embodiments the closing agent may also be applied to other stiffening flaps (not shown). In some embodiments, the packing carton half 3b may comprise a closing side 7, while in other embodiments a closing side 7 is provided on packing carton half 3a, or not at all. The embodiment in which the packing carton half 3b comprises a closing side, and which is shown herein, may be advantageous in some situations. Applying the closing agent to two stiffening flaps 5, which are located on the same packing carton half 3b as the closing side 7, may be advantageous, for example, since a simultaneous application of closing agent to the outer longitudinal side of carton half 3a can thus be simplified by a glue trace (not shown). The glue trace may be a continuous one, and/or include or be formed as a trace of glue droplets and/or discontinuous glue areas or individual glue areas. The second packing carton half 3a is not illustrated. The packing carton is illustrated up to the common longitudinal side 4, which is drawn up to the bend.

(30) In this step, the stiffening flaps 5 are already located in an approximately parallel position relative to the bottom surface 2. In this example, the step of applying a closing agent is carried out by means of two nozzles 16, which may be provided in some embodiments of a machine according to the invention. Preferably, the nozzles 16 are arranged movably. Preferably, they are configured to apply a closing agent to both stiffening flaps 5 of packing carton half 3b, beginning at the side that is closer to the common longitudinal side 4. In the example shown in FIG. 5b the closing agent is applied in the form of a closing agent trace 17. The closing agent trace may include or be formed as a continuous closing agent trace and/or a trace of closing agent droplets or points and/or discontinuous closing agent areas. The closing agent can also be applied, for example, in the form of individual, for example, punctiform or planar coatings.

(31) If the packing carton is now closed, as is shown, for example, in FIG. 4d, two stiffening flaps 5 rest against each other with their outer sides, adhering together, and project into the interior of the carton, as is shown in FIG. 2a. Thus, they stabilize the packing carton in the closed state, which packing carton is exemplarily shown in the figures as a packing carton 1 according to an embodiment of the invention.

(32) FIG. 6 illustrates execution of various method steps of an embodiment of a method according to the invention, with reference to other figures explaining the steps. Additionally, some portions of a related embodiment machine are referenced in FIG. 6, which correspond to the method steps in an exemplary embodiment. Other embodiments including further steps and/or using other machine portions or only some of the machine portions shown in the figures so far are also part of the invention, however.

(33) The first step of an embodiment method comprises the folding of the front stiffening flaps 5, which can be seen in FIGS. 3a and 3b. This is carried out, for example, using the pre-folding wedges 10. Another step comprises the folding of the rear stiffening flaps 5. In the example shown herein this step may be carried out by using the auxiliary means 14, which can be seen in FIG. 3c. In another step the two halves 3a and 3b are folded such that their bottom surfaces 2 enclose an angle of approximately 90, or between 75 and 105 or between 45 and 135. FIG. 4a shows the packing carton already being in the desired position. It also shows the folding aid(s) 11. In this example, two folding aids 11 are shown, whose surface inclination encloses, for example, an angle of approximately 90. Later, the packing carton is pressed against one or more folding devices, as shown in FIG. 4c. In this example, the pressing is carried out by plates 12, which press the packing carton against flat faces of the pre-folding wedges 10. In other embodiments the pressing may also be carried out solely by the folding aids 11, so that the plates 12 are not necessary in some embodiments. In another step a closing agent is applied, an example of which is shown in FIG. 5a. The embodiment of the machine shown in FIG. 5a comprises two nozzles 16. In a next step the packing carton is closed. The closed packing carton is shown in FIG. 4d, together with the portions of the machine of FIG. 4d used for the closing are the plates 18 and the pressing device 13.

(34) FIGS. 7 and 8 illustrates portions of an embodiment of a machine according to the invention for closing a packing carton. In these illustrations, a possible sequence of steps of an embodiment of a method according to the invention can be recognized. The packing carton 1 is conveyed in a forward direction into the machine for closing the packing carton 1. Thus, the stiffening flaps 5 are pre-broken by the auxiliary means 14 during the forward conveyance. During further conveyance, the pre-broken stiffening flaps 5 arrive underneath the pre-folding devices which, in this example, are configured as pre-folding wedges 10. While the front stiffening flaps 5 have already been folded over in a downward direction by the pre-folding devices, the auxiliary means 14, which, in this example, is rotatably mounted, can be brought into a position from which it folds over the stiffening flaps 5 placed in the rear with respect to the direction of movement as the auxiliary means 14 rotates in the direction of the pre-folding devices. While the auxiliary means 14 is moved in the direction of the pre-folding devices 10, the stiffening flaps 5 in the rear are thus folded over. The auxiliary means 14 may be mounted to arrive underneath the tapered portions of the pre-folding devices 10 during the rotation operation, allowing the auxiliary means 14 to stabilize the rear stiffening flaps 5 in the folded position until the rear stiffening flaps 5 rest underneath the pre-folding devices 10. The forward conveyance may be carried out, for example, by a conveyor such as feeding/pushing device 19.

(35) Once the packing carton is located underneath the pre-folding devices, the vertically movable folding devices 11, which move in this case, for example, from the bottom to the top, can transfer the packing carton into a position in which its bottom surfaces enclose an angle of approximately 90, or between 75 and 105 or between 45 and 135. The folding devices 11 may be arranged, for example, such that they extend on the right and left of the conveyor belt.

(36) Subsequently, the packing carton can be pressed against the folding device by the movable plates 12 which, in this case, are configured as the same component as the pre-folding device 10. Preferably, the stiffening flaps 5 are here folded over inwardly along the entire length.

(37) Next, the packing carton can be conveyed further. Subsequently, a closing agent can, in this example, be applied to two outer sides of stiffening flaps 5 by nozzles 16, whereby the application of the closing agent is preferably carried out from the inside to the outside.

(38) The packing carton may then be closed by the two horizontal plates 18. As described, the outer sides of two stiffening flaps 5, which are provided on different packing carton halves or belong to different packing carton halves, rest against each other.

(39) Subsequently, the packing carton can be conveyed out of the machine.

(40) Those skilled in the art will recognize that the present invention has many applications, may be implemented in various manners and, as such is not to be limited by the foregoing embodiments and examples. Any number of the features of the different embodiments described herein may be combined into a single embodiment, the locations of particular elements can be altered and alternate embodiments having fewer than or more than all of the features herein described are possible. Functionality may also be, in whole or in part, distributed among multiple components, in manners now known or to become known.

(41) It will be appreciated by those skilled in the art that changes could be made to the embodiments described above without departing from the broad inventive concept thereof. It is understood, therefore, that this invention is not limited to the particular embodiments disclosed, but it is intended to cover modifications within the spirit and scope of the present invention. While there has been shown and described fundamental features of the invention as applied to being exemplary embodiments thereof, it will be understood that omissions and substitutions and changes in the form and details of the disclosed invention may be made by those skilled in the art without departing from the spirit of the invention. Moreover, the scope of the present invention covers conventionally known, future developed variations and modifications to the components described herein as would be understood by those skilled in the art.