EP3068699B1 - Blank and packaging produced therefrom - Google Patents

Description

The invention relates to a blank made of a foldable material, such as corrugated cardboard, cardboard or cardboard, for producing a machine-erectable packaging, for example a tray, as well as a packaging produced from such a blank. The blank has a bottom and hinged thereto two side walls, a rear wall and a front wall and possibly two on the front wall and two hinged to the rear wall connecting straps for connecting the side walls with the front wall and the rear wall.

In the DE 10 2004 015 576 A1 a blank is proposed a shelf tray made therefrom with an elastic withdrawal means. The blank has a rectangular bottom, at the four edges of each side walls, a rear wall and a front wall are hinged. On the rear wall, two connecting straps are provided for connecting the rear wall to the side walls. Furthermore, connecting straps for connecting the side walls to the front wall are provided on the side walls. On the front wall, two ends of an elastic member are attached so that the ends face each other and a loop of the elastic member lies inside the erected tray. On the front wall additional tabs are provided, which can be unfolded on the front wall, that the ends of the elastic element between the tabs and the front wall are. The elastic element is fixed after erecting the tray from the blank on the front wall and then the tabs are unfolded on the front wall. Subsequently, the elastic member is stretched and products are filled in the tray, so that the elastic member thereof from the rear wall and along the side walls spans and pulls towards the front wall. This is to an automatic feeding of products within the tray can be achieved.

Further, it is known to provide within a tray or the like packaging a slider which is pulled by means of a closed elastic ring in the direction of the front wall of the tray. In US 2,937,742 Such a slider is shown, which can be pulled by an attached to the front wall elastic ring within the tray from the rear wall towards the front wall.

In the still unpublished international patent application PCT / GB2013 / 051755 a blank and a package of the type mentioned are described. In this case, it is proposed to apply a strip of an elastic material so that it serves as a product feed for products received in the packaging. The attachment of the elastic strip takes place, for example, by the relaxed strip is adhered to the side walls of the partially erected packaging, after which the front wall of the package erected and connecting tabs are glued over the mounting portion of the strip on the side walls. Alternatively, it is proposed to connect the elastic strip biased before erecting the packaging with the two side walls and the rear wall of the flat-lying blank. The connection with the rear wall can be solved, for example, when opening the packaging. In the former alternative, tensioning of the elastic strip prior to erection of the front wall and connection of the connecting flaps of the front wall to the side walls is effected by inserting a cassette into the package through the opening portion to be later closed by the front wall and thereby displacing the elastic strip. In this state, the front wall can be closed and the packaging filled. Subsequently the cassette is removed so that the elastic strip forces the products within the package towards the front wall.

Object of the present invention is to provide a blank and a package of the type mentioned, the production and handling of which is further improved in particular when filling the package.

This object is achieved with a blank with the features of claim 1. According to the invention, a relaxed elastic element is fastened to the connection lugs of the blank hinged to the front wall. The, for example, band-shaped elastic element can, for example, be applied already during the production of the blank or can be subsequently applied to the blank in a pre-processing step preceding the filling. The blank can be equipped in this way particularly variable by applying the elastic element with a feed system. When the elastic element is applied to the flat blank in the relaxed state, the blank and the elastic element can be transported and stored like a conventional blank without an elastic element. By applying the elastic element in its relaxed state to the blank, it acts on the blank during transport and storage, i. before erecting the blank into a package, no forces caused by the elastic element that could lead to unwanted deformation or even damage to the blank. In addition, creeping of the elastic member or peeling off of the connection between the elastic member and the blank is largely precluded.

According to a preferred embodiment of the invention, the elastic element is a band of a reversibly stretchable material at least partially covering the front wall. Suitable materials include, inter alia

Rubber or latex. Preferably, the band has two free ends which are each secured to one of the two connecting straps. In this case, the free ends of the band preferably point away from one another so that the elastic element can be laid on the connecting straps and the front wall as a straight strip.

In order to facilitate the removal of products from the packaging that can be produced from the blank, a removal opening may be formed in the front wall and / or in the bottom, which preferably covers the elastic element at least in regions. The removal opening can be completely or partially closed by a tearing tab.

The handling of the packaging to be produced from the blank can be facilitated by the fact that the elastic element can be locked in a tensioned state. According to a preferred embodiment of the invention, a retaining lug is articulated thereto on the rear wall on the edge facing away from the bottom. In this case, it is preferable if the width of the retaining tab delimited by free edges or grooves or bending lines is smaller than the width of the bottom in the area between the opposing side walls. In this way, it is possible to unfold the retaining tab on the rear wall, even if a tool holds the elastic element to the rear wall and possibly the side walls clamped fitting. If the width of the retention tab is only slightly smaller than the width of the bottom between the side walls, the elastic member is nearly parallel to the side walls, which is preferred when filling products.

In order not to damage the elastic element in its tensioned state by cutting edges of the retaining tab, hinge tabs are hinged to the retaining tab on opposite edges. These may be unfolded on the retention tab prior to tensioning the elastic member and possibly connected to it, so that the side walls facing edges of the retaining tab are smooth and rounded.

The retaining tab can be kept particularly easy in its exciting the elastic element position when formed in the bottom of the blank by incisions or cut-a locking tab which is hinged on one side in the ground. This locking tab is preferably set back with its rear edge facing the free edge of the edge of the bottom to which the rear wall is hinged. Preferably, this free edge of the locking tab is set back by at least one, in particular by at least two material thicknesses. When the locking tab is slightly deflected out of the plane of the bottom after the resilient member has been tensioned by the retaining tab, the retaining tab is pressed by the resilient member against the free edge of the locking tab and fixed in its folded-back position ,

In order to prevent the retaining tab and / or the locking tab from being unintentionally pivoted by the force of the resilient member into a position in which the resilient member can relax, detent means may be provided on the detent tab and / or on the detent tab. This can be done, for example, by locking projections on the locking tab and corresponding exceptions on the retaining tab.

The object of the present invention is further achieved with a package which is folded from a blank of the type mentioned above from a flat transport state by machine in an erected state of use. Here, the elastic element between the articulated on the front wall connecting straps and the side walls is attached. In other words, the elastic element extends in the erected packaging in sections parallel to the side walls, in that the connecting straps, to which the ends of the elastic element are preferably fastened, are folded onto the side walls. It is particularly preferred if the two free ends of the elastic element are glued between the connecting straps and the side walls clamped with the connecting straps and the side walls. The middle region of the elastic element, which is not fixedly connected to connecting straps or the sidewalls, extends parallel to the front wall of the packaging in the unstressed state of the elastic element. After tensioning of the elastic element, this middle section of the element, which is not firmly connected to the packaging, preferably extends parallel to the side walls on the inside of the packaging up to the rear wall and is fixed in parallel thereto by the retaining tab and / or the locking tab.

The packaging may additionally have a cover with which the region lying opposite the bottom is closed after the packaging has been filled. For this purpose, the cover may have a cover surface opposite the base and peripheral walls hinged thereto, which cover the side walls, the rear wall and / or the front wall at least in regions. In the top surface may additionally be provided by a weakened line tear tab.

Another aspect of the present invention relates to a method of making a package and a package made therefrom, the method comprising the steps of: providing a blank of foldable material having a bottom and hinged thereto two side walls, a back wall, and a front wall; then attaching a relaxed elastic member to the front wall or the front wall hinged connecting straps, then erecting the side walls, the rear wall and the front wall of a flat lying Transport state in a deployed unfolded state and connecting the side walls with the rear wall and the front wall and then tensioning the elastic member. The production of a package in this order has the advantage that the blank can be transported and stored in a flat transport state to save space. The elastic element may be applied variably either immediately after the blank has been manufactured or only shortly before the packaging is erected from the blank. In other words, the blank can be transported and stored with or without elastic element. Furthermore, this also makes it possible to equip an elastic element and thus a feed system for the packaging variably and individually. If the tensioning of the elastic element takes place only after the walls have been erected and joined, the packaging already has sufficient stability which helps prevent damage during tensioning by the elastic element.

In the last step of the method, the elastic element is preferably tensioned such that it extends on the inside of the packaging at least approximately parallel to the side walls and the rear wall. This facilitates the filling of the erected packaging.

Preferably, the elastic element is locked after clamping in its tensioned state. This makes it possible to temporarily store the ready for filling prepared packaging and / or transport to a filling station.

The locking of the elastic element can, for example, be effected by hinging to the rear wall at the edge of the retaining edge applied to the bottom, the elastic element being locked in its tensioned state by the latter between the rear wall and after tensioning of the elastic element on the back wall unfolded retaining tab is determined. In this case, it is preferred if in the bottom by Ein- or cutouts a locking tab is formed, which is articulated on one side to the ground. In this case, the retaining tab is locked in its unfolded on the rear wall position by the locking tab is pivoted out of the plane of the bottom. The risk of damage to the elastic element can be minimized by hinging on the retaining tab at opposite edges Krempelaschen that are unfolded before the tensioning of the elastic member, in particular before the erection of the package, on the retaining tab and connected thereto.

Another essential aspect of the present invention relates to a plant for producing a package from a flat blank having a bottom and hinged thereto two side walls, a rear wall and a front wall and two at the front wall and two attached to the rear wall connecting straps for connecting the side walls with the front wall and the rear wall has. According to the invention, this system has at least one first station for erecting and connecting the side walls, the rear wall and the front wall and a second station connected downstream of the first station for tensioning an elastic element attached to the blank with two ends. The arrangement of the stations in succession causes the elastic element is tensioned only when the packaging is already fully erected and the walls of the package are connected together. This minimizes the risk of damage to the package due to the tensile force of the elastic member and during tensioning of the elastic member.

The first station for erecting the walls may, for example, have a stamp, which is adapted in its contour to the ground. The stamp may also have, for example, suction elements, so that a blank can be fastened to the stamp.

The stamp can then be guided with the blank through a suitably shaped die, thereby giving away the walls by about 90 ° relative to the bottom. Alternatively, it is also possible to pivot the walls individually by means of appropriate manipulators relative to the ground.

The first station, in which the walls are erected and connected together, may be preceded by another station for securing two ends of a relaxed, strip-like, elastic element on the flat blank. This further station upstream of the first station does not necessarily have to be close to the location of the first station. Rather, this pre-designed further station can be provided at the place of manufacture of the blank, so that the blank is already brought to the first station with the elastic element fastened thereon.

The second station, in which the elastic element is tensioned, preferably has at least two manipulators movable relative to the package erected in the first station. These are each preferably adapted to grasp the elastic element away from its ends attached to the blank and to move along a path having a directional component parallel to the side walls and a directional component parallel to the rear wall. For example. For example, each manipulator may have a metal sheet which is driven in a slide, for example, an S-shaped backdrop, guided. The term sheet is understood in the present case a flat, flat element, which may consist of metal or another rigid or flexible material. The detection of the elastic element by the manipulators includes not only an example. Pliers-like gripping of the elastic element from two sides but also the case that a manipulator comes only from one side against the elastic element in abutment and this shifts. The movement of the elastic element in the two directional components can be a rectilinear motion be, for example, from a central region of the front wall in the two corners between the rear wall and the side walls. Alternatively, the movement may be along a bent and / or curved path. In this case, it is particularly preferred if the manipulators are set up in such a way that the elastic element is grasped at two areas situated eccentrically on the front wall and the corners are forced between the rear wall and the side walls. The point of application of the manipulators on the elastic element is preferably such that the elongation of the elastic element takes place uniformly, without requiring relative movement between the elastic element and the manipulators. This can be done by the distance between the manipulators at the beginning of the clamping process corresponds to the distance of the manipulators in the uniformly tensioned state.

It is particularly preferred if the second station has a first means for unfolding a blank restraining tab on the rear wall and the tensioned elastic member, and second means for pivoting a locking tab of the blank relative to the bottom and back wall. Alternatively, the first device and / or the second device may also be provided in a further station connected downstream of the second station.

The second station may be followed by a filling station for filling the erected packaging with products. It is preferred if in the filling station further means for pivoting a locking tab of the blank is provided relative to the bottom, which releases the locking of the retaining tab with the locking tab again. In other words, immediately after the filling of the packaging, the elastic element is released so that it first pushes the products over the retaining tab towards the front wall and after removal of some Slipping products from the then in the direction of the front wall pivoting retention tab and acts directly on the products. It is particularly preferred if the pivoting of the locking tab for releasing the retaining tab is done by the products themselves. The further means for pivoting the locking tab can thus be the device that brings the products into the package.

Fig. 1

einen Zuschnitt nach einer ersten Ausführungsform der Erfindung,

Fig. 2

eine aus dem Zuschnitt nach Fig.1 aufgerichtete Verpackung mit ungespanntem elastischen Element,

Fig. 3

die Verpackung nach Fig. 2 mit gespanntem elastischen Element,

Fig. 4

die Verpackung nach Fig. 2 mit gespanntem und arretiertem elastischen Element,

Fig. 5

in Seitenansicht eine Station zum Spannen des elastischen Elements,

Fig. 6

in Vorderansicht die Station nach Fig. 5,

Fig. 7

in Draufsicht die Station nach Fig. 5,

Fig. 8

in Perspektivansicht die Station nach Fig. 5

Fig. 9

einen Zuschnitt nach einer zweiten Ausführungsform der Erfindung,

Fig. 10

eine aus dem Zuschnitt nach Fig. 9 aufgerichtete Verpackung und

Fig. 11

einen Zuschnitt nach einer dritten Ausführungsform der Erfindung.

The invention will be described in more detail below with reference to exemplary embodiments and with reference to the drawing. They show schematically:

Fig. 1

a blank according to a first embodiment of the invention,

Fig. 2

one from the blank after Fig.1 erected packaging with unstressed elastic element,

Fig. 3

the packaging after Fig. 2 with stretched elastic element,

Fig. 4

the packaging after Fig. 2 with tensioned and locked elastic element,

Fig. 5

in side view, a station for tensioning the elastic element,

Fig. 6

in front view the station after Fig. 5 .

Fig. 7

in top view the station after Fig. 5 .

Fig. 8

in perspective view the station after Fig. 5

Fig. 9

a blank according to a second embodiment of the invention,

Fig. 10

one from the blank after Fig. 9 erected packaging and

Fig. 11

a blank according to a third embodiment of the invention.

In Fig. 1 a blank 1 is shown in its flat transport state. The blank 1 is provided with a plurality of creasing or bending lines 2a, 2b, 2c, 2d, 2e, 2f, 2g, through which a bottom 3, side walls 4, a front wall 5, a rear wall 6, connecting tabs 7 and 8, a retaining tab. 9 and carding pockets 10 are defined.

As in Fig.1 shown, the bottom 3 is rectangular in the illustrated embodiment in that the bottom 3 bounding crease lines or bends 2a, 2b, 2c perpendicular to each other. On the in Fig.1 Right and left side of the bottom 3, the substantially rectangular-shaped side walls 4 are pivotally articulated. The side walls 4 are therefore integrally connected to the bottom 3. On the in Fig. 1 lower side of the bottom 3, the front wall 5 is articulated, whose lateral edges are also defined by creasing or bending lines 2 d, via which the connecting straps 7 are hinged to the front wall 5. Also, the front wall 5 with the connecting plates 7 is thus integrally connected to the bottom 3. On the in Fig. 1 Upper side of the bottom 3 is hinged via a crease or bend line the rear wall 6. The lateral edges of the rear wall 6 are in turn defined by creasing or bending lines 2 e, via which the connecting straps 8 are hinged to the rear wall 6. On the in Fig. 1 Upper side of the rear wall 6 is hinged on a double creasing or bending line 2 f, the retaining tab 9, which in turn is connected via lateral creasing or bending lines 2 g with the card shackles 10. Thus, the rear wall 6, the connecting straps 8, the retaining tab 9 and the card shackle 10 are also integrally connected to the bottom 3.

The creasing or bending lines 2d, 2e, which connect the connecting straps 7 and 8 to the front wall 5 and the rear wall 6 in the illustrated embodiment with respect to the creasing or bending lines 2a, which connect the bottom 3 with the side walls 4 by about one Material thickness in Fig. 1 arranged offset outwards. This causes that when erecting the blank 1 to a package, the connecting tabs 7 can be mounted on the outside of the side walls 4, without causing a tension of the package.

In the bottom 3 in the illustrated embodiment, a locking tab 11 is formed by a recess 12 is provided in the region of the creasing or bending line 2c, which connects the bottom 3 with the rear wall 6 and this substantially substantially extending incisions 13 in the Floor 3 are formed. Via a further creasing or bending line 2h the locking tab 11 is pivotally connected to the bottom 3.

In the illustrated embodiment, a removal opening 14 is provided in the front wall 5, which extends slightly beyond the bottom or the bottom wall 3 with the front wall connecting groove or bend line 2b in the region of the bottom 3. In the illustrated embodiment, the removal opening 14 is provided centrally in the front wall 5, so that webs of the front wall 5 extend on both sides of the removal opening 14.

The blank 1 according to the invention is provided with an elastic element 15, which in the illustrated embodiment is a strip or a band made of latex. The elastic band 15 has substantially the width of the front wall 5 including the connecting tabs 7, so that the elastic band 15 can be placed on the connecting tabs 7 and the front wall 5, wherein the free ends of the elastic band 5 approximately in the vicinity of the free lateral Edge of the connection tabs 7 come to rest. The elastic band 15 is glued in the illustrated embodiment with the two connecting straps 7, so that a central region of the elastic band 15, which covers the front wall and the removal opening 14 partially, only loosely attached to the blank 1 rests on the two ends.

Subsequently, the erection of a package according to the invention from the blank after Fig. 1 explained in more detail. For this purpose, first the side walls 4 and the front wall 5 and the rear wall 6 are pivoted relative to the bottom 3 by about 90 °. Subsequently, the connection tabs 7 and 8 also pivoted about 90 ° and fixed from the outside on the upright side walls 4. This can be done conveniently by gluing. Alternatively, this can be done, for example, by means of brackets. In this way, the lateral ends of the elastic band 15 are clamped between the connecting tab 7 and the outside of the side walls 4 and connected to both the respective connecting tab 7 and the respective side wall 4. The elastic band 15 thus extends partially along the erected side walls 4 and inwardly parallel to the front wall 5, but without being firmly connected thereto. This condition is in Fig. 2 shown.

The elastic band 15 can now be tensioned. It proves to be an advantage that the packaging is already fully erected and the side walls are connected to the front wall 5 and the rear wall 6, so that the package has sufficient stability. As explained in more detail below, the elastic band is stretched so that it is as in Fig. 3 shown inside approximately parallel to the side walls and parallel to the rear wall 6 extends. In this state, the retaining tab 9 can be pivoted by 180 ° inwards, so that this clamps the elastic band 15 between itself and the rear wall 6. Previously, the card shackles 10 have been folded onto the retaining tab 9, so that the card shackles 10 abut the elastic band 15.

The retaining tab 9 can be locked in this position against the tension of the elastic band 15 by the locking tab 11 is slightly deflected out of the plane of the bottom 3 upwards. As a result, the rear wall 6 facing free edge of the locking tab 11 abuts approximately at right angles to the in Fig. 4 lower side of the retaining tab 9 and thus prevents the retaining tab 9 by the restoring force of the elastic band 15 in Fig. 4 is pivoted forward or back up.

In the in Fig. 4 shown state of the packaging, this can be filled. By filling the package, the products exert pressure on the locking tab 11, so that it is forced back into its original position, in which it extends in a plane with the bottom 3. By the filling process thus the locking of the retaining tab 9 is released by the locking tab 11 again. The elastic band 15 thus presses, via the retaining tab 9, the products received in the packaging in the direction of the front wall and the removal opening 14.

If individual products are now taken out of the packaging via the removal opening or upwards, then the elastic band 15 first presses the products still remaining in the packaging in the direction of the front wall 5 via the retention tab 9. After some products have been removed from the packaging, the retaining tab 9 is pivoted by the restoring force of the elastic band 15 so far that it extends, for example, approximately parallel to the bottom 3. Already shortly before reaching this state, the elastic band 15 slips off the retaining tab 9 and exerts a pulling force in the direction of the front wall 5 directly on the products still remaining in the package. The elastic band 15 thus encloses the remaining products in the package laterally and from the back. This prevents that the products, for example, tabular products, fall over in the packaging and are thus less recognizable or removable by a consumer through the removal opening 14.

In the Fig. 2 to 4 is the erected from the blank 1 packaging in the form of an open-topped tray (Schütte) shown. The tray can be closed after filling by a cover having a bottom surface 3 opposite top surface and hinged thereto peripheral walls. The peripheral walls can, for example, outside on the side walls 4 and the rear wall 6 rest. Another peripheral wall can be inserted into the packaging, so that it rests against the inside of the front wall and thus closes the removal opening 14. Alternatively, it is also possible to arrange this additional peripheral wall on the outside of the front wall. Preferably, at least a portion of the top surface and / or the peripheral wall of the cover associated with the front wall is designed to be tearable or tearable, so that the packaging provided with the cover can be easily opened.

The process of tensioning the elastic band 15 and the locking of the elastic band 15 by means of the retaining tab 9 and the locking tab 11 will be described below with reference to FIGS Fig. 5 to 8 explained in more detail. In these figures, a station is shown in which the as in Fig. 2 shown erected packaging introduced and in the state Fig. 4 is transferred.

For this purpose, the station 20 initially has a receptacle for the packaging, which is formed by a bottom 21, side walls 22 and a rear wall 23. The recording is thus on the in Fig. 5 open on the right side so that the packaging can be inserted into the receptacle. In the illustrated embodiment, four openings are provided in the bottom 21 through which suction members 24 can hold the bottom 3 of the package within the receptacle.

Above the recording, a plate 25 is arranged, in which two slotted guides 26 are provided. The slide guides 26 are formed in the illustrated embodiment as an approximately s-shaped opening or groove in which a respective plate 27 is slidably guided. The plates 27 are connected via a non-illustrated drive from the in Fig. 5 dashed shown right position in the left position shown by solid lines. The two bearings of the sheets 27 are also in Fig. 7 by each two dashed or two solid circles in the different positions of the sheets shown.

The slide guides 26 in the plate 25 are designed so that the sheets 27 can move through the removal opening 14 in the front wall 5 into the package inside. Here comes the elastic band 15 with the in Fig. 5 left edge of the respective plates 27 in Appendix. The plates 27 thus serve as manipulators that urge the elastic band in the corners of the side walls 4 with the rear wall 6 by the sheets 27 along the slide guide 26 in Fig. 5 to be moved to the left. In this way, the elastic band 15 is tensioned. The sheets 27 are preferably made comparatively thin, so that the sheets 27 in their in Fig. 5 Left position as close to the inside of the side walls 4 rest, without hindering the turning of the retaining tab 9.

For this purpose, an angle 28 is provided in the station 20, whose width is as in Fig. 8 shown, which corresponds approximately to the retaining tab 9. The angle 28 is out of his in Fig. 5 shown position via a non-illustrated drive in a clockwise direction, so that the in Fig. 5 longer vertical leg of the angle 28 touches the retaining tab 9 and folds up on the rear wall 6. In other words, the angle 28 brings in operation, the retaining tab 9 from the in Fig. 3 shown position in the Fig. 4 shown position.

Next, a cylinder unit 29 is provided in the station 20, the plunger can act through a further opening of the bottom 21 on the locking tab 11 of the package. After turning over the retaining tab 9, the cylinder unit 29 is actuated and thereby pivots the locking tab 11 slightly out of its lying in the plane of the bottom 3 position into the interior of the package, so that the free edge of the locking tab 11 with the lower side of the retaining tab. 9 comes into contact. alternative To the free edge can be a toothing as in the Fig. 9 to 11 be provided shown. This prevents the retaining tab 9 is pivoted back by the force of the elastic band 15 when the angle 28 in his in Fig. 5 shown starting position returns and the sheets 27 back into the in Fig. 5 right position. The packaging is thus in a state after Fig. 4 in which the packaging can be filled.

Notwithstanding the above-described embodiment of the blank 1 and the station 20, it is alternatively also possible to dispense with the retaining tab 9, the card shackles 10 and / or the locking tab 11. In this case, the elastic band 15 is stretched by the sheets 27 as described above, and the package must then be filled as long as the sheets 27 keep the elastic band 15 taut. Thus, after filling, the elastic band 15 acts directly on the products as soon as the sheets 27 are disengaged from the band 15.

The station 20 may be preceded by a further station, not shown in the figures, in which the package is erected from the blank 1 and glued. This upstream station can, for example, as in the unpublished international patent application PCT / GB2013 / 051755 be designed described.

The elastic band 15 can be applied to the blank 1 in a device 20 upstream of the station. This can be done, for example, by unrolling elastic tape material from a roll whose width corresponds approximately to the spacing of the free lateral edges of the connecting tabs 7 and applying it to a substrate. This pad is preferably connected to a suction device, so that the unwound material is held on the pad. On this pad, the unwound material then cut into strips of a height suitable for feeding the products in the package. This cut strip can then be fed to the blank 1 and glued to it at the connecting tabs 7.

In the FIGS. 9 and 10 a second embodiment is shown, which is similar to the first embodiment of the basic structure ago. On the in Fig. 9 Upper side of the retaining tab 9, however, cutouts 30 a are provided. Corresponding cutouts 30b are also provided on the rear wall 6 facing free edge of the locking tab 6. As Fig. 10 shows, in which the elastic band 15 has been omitted for clarity, these cutouts 30a, 30b cause a toothing, which prevents in the erected state of the locking tab 11, that this is urged by the force of the elastic band 15 from the retaining tab 9 arresting position can be. In other words, the locking tab 11 and the retaining tab 9 engage with each other to secure over the retaining tab 9, the elastic member 15.

A modification of this embodiment is in Fig. 11 shown. Here, first, the creasing or bending line 2h, via which the locking tab 11 is connected to the bottom 3, designed curved. This increases the restoring force. In addition, the cuts 13 are designed obliquely. Regardless of the rear wall 6 is designed shortened compared to the other embodiments. Accordingly, the height of the card shackles 10 is smaller. Therefore, in order to avoid a sharp edge with the connecting tab 8, the double creasing or bending line 2f does not extend over the entire width of the rear wall 6 and oblique incisions from the ends of the double creasing or bending line 2f to the respective corners of the Connecting straps 8.

LIST OF REFERENCE NUMBERS

1

cut

2 a-h

Creasing or bending line

3

ground

4

Side wall

5

front wall

6

rear wall

7

connecting strap

8th

connecting strap

9

Retention tab

10

clutter tab

11

locking tab

12

recess

13

incision

14

removal opening

15

elastic element (band)

20

station

21

ground

22

Side wall

23

rear wall

24

suction

25

plate

26

link guide

27

Sheet metal (manipulator)

28

angle

29

cylinder unit

30a, b

neckline

Claims (10)

1. A blank made of a foldable material such as corrugated cardboard, paperboard or carton, for producing packaging which is able to be mechanically assembled, in particular a tray, wherein the blank comprises a base (3) and, articulated thereto, two side walls (4), a rear wall (6) and a front wall (5) as well as two connecting flaps (7, 8) articulated to the front wall (5) and two connecting flaps articulated to the rear wall (6), for connecting the side walls (4) to the front wall (5) and the rear wall (6), characterized in that an unstressed resilient element (15) is fastened to the connecting flaps (7) which are articulated to the front wall (5).
2. The blank according to Claim 1, characterized in that the resilient element (15) is a strip which at least partially covers the front wall (5) and which is made of a reversibly stretchable material, such as rubber or latex, and which comprises two free ends which in each case are fastened to one of the two connecting flaps (7).
3. The blank according to one of Claims 1 or 2, characterized in that a removal opening (14) is configured in the front wall (5), wherein the resilient element (15) at least partially covers the removal opening (14).
4. The blank according to one of the preceding claims, characterized in that a retaining flap (9) is articulated to the rear wall (6) on the edge remote from the base (3), the width thereof, which is defined by free edges or groove lines or bending lines, being smaller than the width of the base (3) between the side walls (4) opposing one another.
5. The blank according to Claim 4, characterized in that fold-over flaps (10) are articulated to the retaining flap (9) on edges opposing one another.
6. The blank according to one of the preceding claims, characterized in that a locking flap (11) is configured in the base (3) by cuts or cutouts (12, 13), said locking flap being articulated on one side to the base (3).
7. The blank according to Claims 4 and 6, characterized in that a free edge of the locking flap (11) is set back from the edge of the base (3) to which the rear wall (6) is articulated, by at least one, in particular by at least two, material thicknesses.
8. The blank according to Claim 7, characterized in that latching means are provided on the retaining flap (9) and/or the locking flap (11).
9. A packaging, in particular a tray, which is mechanically assembled from a blank (1) according to one of the preceding claims from a flat transport state into a folded usable state, characterized in that the resilient element (15) is fastened between the connecting flaps (7), which are articulated to the front wall (5), and the side walls (4).
10. The packaging according to Claim 9 which additionally comprises a cover with a top surface opposing the base (3) and peripheral walls which are articulated to said top surface and at least partially cover the side walls (4), the rear wall (6) and/or the front wall (5), wherein a tear-off flap defined by a weakened line is provided in the top surface.

Images