EP2036818A1 - Method for manufacturing a palletless packaging unit - Google Patents

Abstract

The present invention relates to a method for producing a palletless packaging unit (24) comprising a plurality of packaging articles (4) stacked into a stack (2), in which the packaging articles (4) are stacked in such a way that at least two engagement regions (10 ) are formed for fork legs of a lift truck, the stack (2) is wrapped in any case with its engagement region with a first film (14), the one-sided wrapped stack (16) is turned so that the engaging portions (10) having part of the stack ( 16) comes down and the stack (16) with a up to the first film (14) reaching second film (20) is wrapped. The present invention is based on the problem of specifying an improved method for producing a palletless packaging unit. To solve this problem, it is proposed that the first and the second film are each formed from a tube whose circumference is initially smaller than the circumference of the stack and stretched before wrapping the stack to a circumference greater than the circumference of the stack and with elastic hoop stress is applied to the stack.

Description

The present invention relates to a method for producing a palletless packaging unit comprising a plurality of packaging items stacked in a stack, in which the packaging items are stacked in such a way that at least two engagement areas for fork legs of a lift truck are formed in at least one stack level, the stack at least with its engagement region a first film is wrapped, the unilaterally wrapped good pile is turned so that the engaging portions having portion of the stack comes down and the stack is wrapped with a preferably reaching into the engagement areas of the second film.

Such a method is from those attributable to the present applicant DE 26 14 558 and DE 27 02 613 known. In this prior art method, a shrink hood is pulled over the stack as a first film, which subsequently applied by heat shrinking under welding with another plastic film, which has been previously placed on the stack, closely to the stack. After turning, another shrink film hood was pulled over the stack as a second sheet and also shrunk to the stack by thermal shrinkage, welding to the overlapping portions of the first sheet.

The generic method has proven particularly useful for forming packages of stacked sacks, such as concrete, gypsum or mortar sacks, especially in those areas where the use of pallets for storing a stack of goods is unusual, and / or the return of pallets becomes too expensive after unloading the packaging items.

However, the implementation of the generic method requires a differentiated dosage and application of heat energy for shrinking the two films on the stack, in particular for welding the two film layers against each other. This welding is considered necessary to connect the palletless layer to a unit that, despite the lack of flat shelf due to the lack of a pallet several times turn and safely transport, without the risk that the stack will lose its stability.

The present invention is based on the problem of specifying an improved method for producing a palletless packaging unit.

To solve this problem, the present invention proposes a method having the features of claim 1. This differs from the generic state of the art in that the first film and the second film are each formed from a tube whose circumference is initially smaller than the circumference of the stack and before the wrapping of the stack to a circumference greater than the circumference stretched the stack and applied with elastic hoop stress to the stack. In other words, in the generic method, a palletless packaging unit is produced by stretching two film tubes and coating over the stack in the opposite direction with respect to the height axis of the stack. It has surprisingly been found that even with stretched film tubes (as disclosed, for example, in US Pat EP 1 013 549 ) a palletless packaging unit can be produced, which has the necessary strength and dimensional and dimensional stability even with repeated handling. According to the applicant's surprising test results, a packaging unit produced in this way can be produced reliably even without a pallet forming the storage surface. In this case, care must be taken to ensure that the packaging regions surrounding the engagement regions are stacked such that the engagement regions for the fork legs engage, in particular when the first film is stretched in such a way that it connects the edges surrounding the engagement regions in the manner of a tangent allow the fork legs. This does not exclude the possibility that the engagement portions for fork legs are provided adjacent to opposite side surfaces of the stack. Engaging areas for fork legs can also be formed, for example, by creating a free space between two packaging objects which are arranged in a stack level. Usually, however, one will form the engagement areas on opposite edges of the stack, so that the fork legs of a lift truck can also be introduced by moving the fork leg initially moved laterally next to the stack in the engagement areas. By this engagement of the fork legs, it is possible, for example, first to urge tangentially two edges of the stack of material bridging foil material in the engagement areas inward, so that the fork legs come to rest on the stack forming layers.

The engagement areas are usually formed by a so-called special situation, which is stacked differently from the normal layers of the stack and has a smaller footprint than this. In the case of identically dimensioned packaging items which form the stack of goods, for example bags filled with bulk goods, the special situation has fewer packaging items than the normal position. To form the engagement regions, a plurality of special layers can also be stacked on top of one another, resulting in an engagement region with a larger engagement height.

According to a preferred embodiment of the present invention, the first and the second film is formed from the same tube. This can be the identical tube, provided that the stack to be wrapped is coated after turning at that position with the second film on which it has also been coated with the first film. Furthermore, the first film on the outside and / or the second film on the inside can be provided with a bonding agent and / or with a friction-increasing surface, so that the sections of the two films provided in the overlapping region of the first and second films interlock with one another and / or or cling to each other.

To increase the strength of the packaging unit, in particular during transport, it is proposed according to a further preferred embodiment of the present invention to place a holding position on the stack before wrapping the stack with the first film, in such a way that this holding position, the engagement areas and adjacent thereto provided packaging items covered. The wrapped packaging unit is reinforced after completion by the holding position in particular adjacent to and over the engagement areas, so that when lifting the stack of goods through the lift truck sagging of layers of the stack between the fork legs or laterally past individual fork legs is effectively prevented. In the aforementioned preferred embodiment, the engaging portions should be immediately adjacent to opposite longitudinal sides of the stack, so provided on opposite edges of the stack, so that the fork legs of a lift truck can be passed past both sides of the stack and by successive closing of the fork legs only in the engagement areas and can be brought under the first film and the holding position. The introduction of the fork legs is therefore essentially without destruction of the films by lateral approach, ie closing the fork legs towards each other.

Of course, several holding layers in the aforementioned manner can first be placed one above the other on the stack before it is wrapped with the first film. The holding position serves primarily or even exclusively the mechanical reinforcement of the underside of the packaging unit. Accordingly, a holding layer can be formed from a fabric-reinforced film web. Alternatively or additionally, the holding layer may be formed from a web reinforced with a grid structure. The grid structure may be a permeable grid structure in this preferred development. The individual strands of the grid act as traction tendrils which stiffen the bottom of the packaging unit. The holding layer may consist of a plastic film material, cardboard, or a knitted fabric. Also, tabular elements made of wood or metal or plastic are suitable for the formation of the retaining layer.

In turn, means may be provided at the phase boundary between the holding layer and the first film web, which promote an intimate bond between the two film webs. Thus, for example, an adhesive bond between the holding position and the first film web can be realized. In particular, in a preferred embodiment, in which the first and / or the second film is welded off before wrapping the stack to form a hood and separated from a strand of the first and / or the second film supplying the film material, can by dimensional design of the film relative to the base of the stack and proper process management when coating the stack on the bottom later, ie the top when coating the first film, a certain tension of the film material can be achieved, which leads to an improved connection between the retaining layer and the first sheet material. If the retaining layer has a profiled lattice structure, this can be pressed into the film material of the first film by sufficient clamping of the first film on the upper side of the material stack and thus anchored therein.

The holding position, for example, when the stacked stack of goods and introduction into a first workstation, where the stack is wrapped with the first film, are placed on the top of the engaging areas. Thus, for example, a hanging down holding position can be taken from the horizontally moving stack and after subtracting a desired length of a continuous strand fed the film web can be cut from this strand. It is desirable in this case to have a method guide in which the holding layer not only covers the upper side of the stack of goods when the first film is coated, but also extends at least a little beyond the adjacent, mutually opposite side walls of the stack. In such an embodiment, the subsequent coating at least with the first film leads to the fact that the voltage applied to the side wall of the stack of goods length portions of the holding position are pressed against them, so that the holding position is additionally fixed relative to the stack. As a result, the holding function of the holding position is further improved, which ensures that individual packaging items of the finished packaged packaging unit does not sag when lifting down.

As a holding position, a short hose hood can be applied under elastic elongation to the stack, whereby the stack is reinforced in the region of its later underside by a stretch hood. This short hose cover usually extends two to four layers over the stack, but does not extend over the entire height of the same. The short tube cap is preferably made of the film material of the first film to simplify the process, so that the short tube cap and formed by the first film, usually the entire stack of high-covering hose hood manufactured with the same device and pulled at the same station on the stack can be.

The holding position can be placed before and / or during or after the stacking of the stack or completely or partially disposed between different layers of the stack to fix the holding position within the stack of goods. It is also conceivable to first apply the special position to a holding position, to transfer the holding position over the single or the highest special layer and then to stack the normal layers. The stacked stack is then rotated 180 ° and covered with the first film. After rotating again by 180 °, the stack is then covered with the second film.

According to a further preferred embodiment of the present invention, a soil reinforcement can be placed on the stack before coating the first film. This floor reinforcement can be formed, for example, from cardboard, a foil or a panel made of plastic, wood or metal and will be used in particular when the stacks of goods are pushed upright when being folded on the later underside. The soil reinforcement protects the bottom layer of the finished pile of goods during transport and when handling against damage. Furthermore, the bottom reinforcement may also have a certain rigidity, and thus form a basically rigid bottom.

According to a preferred development of the present invention, the first film is drawn from the upper side comprising the engagement regions to the region of the underside of the product stack above it. As a result of this measure, the first film surrounding the engaging regions and held there is fixed over the entire height of the product stack, so that there is no risk of the first film slipping off the product stack in the longitudinal direction when it is lifted by the lift truck and moving as a result, packaging objects of the lowermost layer move gravity direction and want to break out of the stacked composite. For further solidification of the packaging unit in this preferred development, the second film is drawn substantially over the entire stack of goods after turning, so that the second film against the stack of elastic material against the peripheral surface of the stack with the interposition of the first sheet against the stack applies and the first Film additionally fixed. In this case, the second film should cover after turning now lying on top of the bottom of the stack, so that the stack is covered by the elastic against the stack of fabric hose hood on the top side and protected against the ingress of dirt and moisture.

Preferably, the second film is pulled over the stack so that it ends at the level of the engagement areas. The second film is preferably pulled over the stack so that it does not interfere with the engagement of the fork legs of a lift truck or only slightly. Preferably, the second sheet material is dispensed in the engagement regions at the end of the coating process, ie actively released by driving Reffrollen of these Reffrollen associated with the refining. The film material of the second film is accordingly supplied to the level of the engagement regions. Due to the hoop stress with which the second foil is applied to the stack, the material of the first foil and / or the retaining layer which initially essentially tangentially overlaps two outer edges of the stack is pushed inwards in the engagement regions, so that the original contour of the stack is Also on the outside of the film webs is recovered. In other words, feeding of increased material results in the second film in the edge-side engagement areas that they are more easily accessible to the fork legs of a lift truck without destroying the film material.

According to a preferred embodiment of the present invention, the sheet material is supplied while a film deflecting the upper edge of the refining fingers is stationary at the upper end of the engagement areas, i. at the point where the highest special situation ends. In this process, the supplied sheet material is conveyed directly under the lowest normal position, so that the first tangentially extending between two edges of the stack material of the first sheet or the holding position moves in the corner of the stack and the stack is then contour contoured enveloped by the slides.

According to a further preferred embodiment, the first and / or the second film or the short hose hood with an elastic circumferential extent of at least 50%, preferably of at least 70% based on the unstretched circumference of the tubular film is applied to the stack. Envisaged are circumferential strains of up to 150%, whereby a tight and compact packaging unit is obtained.

Further preferred developments of the method according to the invention are specified in the subclaims.

The present invention further provides protection for a packaging unit produced by the method according to the invention, comprising a plurality of layers of stacked packaging articles stacked such that at least two engaging portions for fork legs of a lift truck are formed in a stacking plane and the one surface and in any case, parts of the side surface enclosing hood made of a first film material and in the opposite direction to this over the stack drawn hood from a second film material, wherein the tube cap formed from the first and second formed film are applied as a stretch hood to the stack, ie abut with elastic circumferential strain on the stack.

Figur 1

einen gestapelten Gutstapel vor dem Umhüllen mit Folie;

Figur 2

den in Figur 1 gezeigten Gutstapel nach dem Auflegen einer Haltelage;

Figur 3

den in den Figuren 1 und 2 gezeigten Gutstapel nach dem Überziehen mit einer ersten als Haube ausgebildeten Folie;

Figur 4

den in Figur 3 gezeigten einmalig umhüllten Gutstapel nach dem Wenden;

Figur 5

die nach neuerlichem Überziehen mit einer zweiten als Schlauchhaube ausgebildeten Folie vollständig umhüllte Verpackungseinheit;

Figur 6

einen gestapelten Gutstapel vor dem Umhüllen mit Folie nach einem zweiten Ausführungsbeispiel der vorliegenden Erfindung;

Figur 7

den in Figur 6 gezeigten Gutstapel nach dem Auflegen einer Haltelage;

Figur 8

den mit der Haltelage umgebenden Gutstapel gemäß Figur 7 nach dem Aufstapeln einer Sonderlage;

Figur 9

den in Figur 8 gezeigten Gutstapel nach dem Überziehen mit einer ersten als Haube ausgebildeten Folie;

Figur 10

den in Figur 9 gezeigten einmalig umhüllten Gutstapel nach dem Wenden;

Figur 11

die nach dem neuerlichen Überziehen mit einer zweiten als Schlauchhaube ausgebildeten Folie vollständig umhüllte Verpackungseinheit;

Figur 12

die Einzelheit E gemäß Figur 11 kurz vor Beendigung des Überziehens mit der zweiten Folie; und

Figur 13

die in Figur 12 gezeigte vergrößerte Einzelheit nach dem vollständigen Überziehen der zweiten Folie.

Further details and advantages of the present invention will become apparent from the following description of an embodiment of the present invention taken in conjunction with the drawings. In this show:

FIG. 1

a stacked stack before wrapping with foil;

FIG. 2

the in FIG. 1 shown good pile after placing a holding position;

FIG. 3

in the Figures 1 and 2 shown Gutstapel after coating with a first formed as a hood foil;

FIG. 4

the in FIG. 3 shown once wrapped good stack after turning;

FIG. 5

the after renewed coating with a second formed as a tube hood film completely wrapped packaging unit;

FIG. 6

a stacked stack before wrapping with foil according to a second embodiment of the present invention;

FIG. 7

the in FIG. 6 shown good pile after placing a holding position;

FIG. 8

according to the surrounding with the holding layer stack FIG. 7 after stacking a special situation;

FIG. 9

the in FIG. 8 shown Gutstapel after coating with a first formed as a hood foil;

FIG. 10

the in FIG. 9 shown once wrapped good stack after turning;

FIG. 11

the packaging unit which has been completely enveloped after renewed coating with a second foil formed as a tube hood;

FIG. 12

the detail E according to FIG. 11 shortly before completion of coating with the second film; and

FIG. 13

in the FIG. 12 shown enlarged detail after the complete coating of the second film.

The FIG. 1 shows an embodiment of a stack of goods 2 with several summarized in a stack level packaging items 4, which should be formed in the present case by cement bags. On top of each other several levels of packaging items 4 are stacked. Each stack level has in the normal layers 5, the same number of packaging items 4, so that there is a substantially cuboid stack 2. Only the upper layer is designed as a special layer 7 and has fewer packaging items 4, so that at the edge of the stack of goods between the top 6 and opposite side surfaces 8 engagement portions 10 are formed, which extend at right angles to the plane of the drawing parallel to the side surfaces 8, over the entire depth of the stack 2. The width of the Engaging portions 10, that is, the distance between the side surface 8 and the parallel thereto extending side surface of the upper packaging items 4.1; 4.2 is chosen so that the fork legs of a lift truck can be driven almost or completely under the normal layers 5 of the stack 2 and thus in the engaging portions 10.

The stacked stack 2 is driven for example via a conveyor line, such as a conveyor belt in the direction of a hood stretcher (see. EP 1 013 549 ). On the way to the hood Stretcher will - like FIG. 2 clarified - a Haltelage 12 placed on the top 6. The length of the retaining layer 12 is dimensioned such that a flat layer forming the retaining layer 12 lies both on the upper side 6 and partly along the side surfaces 8. The retaining layer 12 is located at FIG. 2 in a state loosely placed on the stack 2. In a hood stretcher is now formed in a conventional manner by cutting an endlessly conveyed tubing, end-side welding and cutting a length of the tubing a hose cap of a first film 14, which is first reefed and elastically stretched by moving apart of refiners in the circumferential direction, ie is stretched , And to a circumference that is greater than the base of the stack 2. This transversely stretched tubular hood is now applied by subtracting the refusers first on the top 6 and then on the side surfaces 8 of the stack 2 at relative movement between the refusers and the stack 2 in the height direction of the stack 2. Usually, the Refffinger be lowered. Thereafter, the stack 2 is wrapped on one side of the first sheet 14 and covered on the top. The cover takes place with the interposition of the holding layer 12. The first film 14 lays against the peripheral walls of the stack 2, ie the side surfaces 8 and thus pushes the web of the holding layer 12 against the stack 2 (see. Fig. 3 ).

The retaining layer 12 has a dimension in the depth direction of the stack 2 substantially corresponding to the depth of the stack of goods. In other words, the front and rear edges of the retaining layer 12 extend substantially parallel to the front and back of the stack 2, ie those side surfaces which form the periphery of the stack 2 and extend at right angles to the marked in the drawing by 8 reference side surfaces.

After coating the first film 14, the one-sided wrapped and identified by reference numeral 16 good stack is turned so that when placing the holding layer 12 and the coating of the first film 14, the top 6 forming surface now forms the bottom 18 of the stack 16 and down is located (cf. FIG. 4 ). In this position, the one-sided wrapped good stack is usually fed via a transport route a hood stretcher. This can be the hood stretcher, which has pulled the first film 14 as a hose hood over the stack 2.

How out FIG. 5 it can be seen, in the last step, a second film 20 is also pulled as a hose cover over the one-sided wrapped stack 16, in such a way that the second film 20 hangs on the first cover the bottom 22 forming surface of the stack 2 and also at the circumferential walls 8 of the stack 2 at least under horizontal bias applies, with the interposition of the first film 14, so that there is a marked with reference numeral 24 finished packaging unit. In this presses the first sheet 14, the retaining layer 12 against the side surfaces 8 of the stack of goods 2. Furthermore, the first sheet 14 is fixed relative to the stack 2 by the second film 20 and its circumferential elastic strain when applied to the stack 2. The second film is sufficient in the first embodiment of the FIGS. 1 to 5 up to the lowest normal position 5.

It is a packaging unit 24 created that is dimensionally stable and also tolerates a multiple turn. The fork legs of a lift truck are usually first led past the side of the stack 2 and then fed through each other laterally into the engaging portions 10. In this case, the material of the first film 14 can be pushed inwards. The present invention is not limited to the embodiment shown. For example, special means may be used to deform the first film 14 and / or the retaining layer 12 in the engagement regions 10 and to apply them close to the material stack 2. For this purpose, the film material can be mechanically connected to the stack.

In the in the FIGS. 6 to 13 shown second embodiment, the stack 2 is stacked with six normal layers 5 of packaging objects 4 first. After that the retaining layer 12 is applied to the top of the stack 2 (see. FIG. 7 ). Thereafter, the special layer 7 comprising the packaging items 4.1 and 4.2 is stacked on the top of the stack 2 with the interposition of the holding layer 12. Also in this embodiment, only a special situation 7 is formed. Of course, two, regularly formed with identical base area special layers can be provided one above the other.

The in FIG. 8 shown, ready stacked stack 2 is now wrapped with the first film 14, which is applied under elastic circumferential expansion of the stack. The first film 14 can in this case also be applied with a certain longitudinal extension to the stack in order to clamp it in the longitudinal direction and in the circumferential direction by elastic expansion portions of the first film 14.

The in FIG. 9 shown unilaterally wrapped stack 2 is now rotated by 180 ° (see. FIG. 10 ). Thereafter, the second film 20 is pulled over the stack 2 and possibly also applied with elastic elongation at a certain longitudinal extension of the stack.

It will - like FIGS. 12 and 13 illustrate - the material of the second film 30 in the manner of a collar in several closely juxtaposed, possibly also superimposed film pleats introduced into corner regions 26 between the special layer 7 and the lowest normal position 5 by the special layer 7 superior packaging items 4 of the lowest normal position. 5 are formed. In the embodiment shown, the coating movement is stopped for this purpose, when refining fingers 28 of a device (not shown in detail) for clamping and covering the hose cover are located above the stack of goods 2 at the upper end of the engagement regions 10. Refreshers 30 associated with the refiners 28 are now driven to release the remaining material of the second film 20 from the refining finger 28 and feed it to the corner region 26.

The beginning of this process step is in FIG. 12 to recognize. The second film 20, because of its circumferential expansion, wants to relax inwards and thereby urges the first film 14 in the corner region 26. Since the second film 20 is deposited in a plurality of layers in the corner region 26 (cf. FIG. 13 ), the hoop stress generated by the second foil 20 in the corner regions 26 becomes stronger than the tension of the first foil 14, which first extends between two edges 32, 34 of the stack 2, namely an edge 34, on the underside the rotated stack of goods 2 is formed, and an edge 32 which is formed by the lower edge of the first normal position 5 (see. FIG. 10 ). The initially tangentially extending material of the first film 14 is accordingly applied to the good stack 2 between the two edges 32, 34 contour true by the hoop stress of the second film 20. This results in substantially rectangular engagement portions 10 for the fork legs of a lift truck (see. FIG. 13 ).

That with regard to the FIGS. 12 and 13 described procedure can also be used to the first film (for example, the coating according to FIG. 9 ), in the engagement regions 10 to apply tightly to the contour of the stack of goods. For this purpose, the first film at the level of the engagement regions 10 can be supplied by the refffingers 28 to the engagement regions 10 by driving the refurbing rollers 30 associated therewith. Although the film may in this case depending on their elastic properties and their pre-stretching in the circumferential direction in dimensions are also drawn to the top 6 of the stack. But it can also be promoted in the intervention areas to prevent an embodiment, for example, in the Figures 9 and 10 is shown and in which the first film 14, the two edges 32, 34 extends connecting.

In this development, the Refffinger, especially the upper edge of the Refffinger in the lower region of the engagement areas, ie approximately at the height of the transition between the special situation 7 and the normal position 5 in an upright pile before turning (see, for example FIG. 8 ).

LIST OF REFERENCE NUMBERS

2

stack

4

Packaging articles

5

normal position

6

top

7

special location

8th

faces

10

engagement area

12

holding position

14

first slide

16

one-sided wrapped good stack

18

ground

20

second foil

22

bottom

24

Packaging Unit

26

corner

28

reefing fingers

30

furling foil

32

edge

34

edge

Claims (19)

Method for producing a palletless packaging unit (24) comprising a plurality of packaging items (4) stacked to form a stack (2), in which the packaging items (4) are stacked in such a way that in at least one stack level at least two engagement portions (10) for fork legs of a lift truck be formed
the stack of goods (2) is wrapped in any case with its engagement region with a first film (14);
the one-sided wrapped good stack (16) is turned over, so that the part of the stack (16) having the engagement areas (10) comes down and the stack (16) comes with a second film (20) reaching up to the first film (14). is wrapped,
characterized,
in that the first film (14) and the second film (20) are each formed from a tube whose circumference is initially smaller than the circumference of the product stack (2) and which is greater than that before encasing the product stack (2) Scope of the stack (2) stretched and applied with elastic hoop stress to the stack (2). Method according to claim 1, characterized in that
that the first film (14) and the second sheet (20) from the same tube are formed. Method according to claim 1 or 2, characterized
in that firstly a retaining layer (12) overlaps the engagement regions (10) and packaging articles (4) provided thereon on the good stack (2) and thereafter the good stack (2) with the first film (14) interposing the retaining layer (12) is wrapped. Method according to claim 3, characterized
that the holding position (12) is placed as a film web on the stack (2), that the holding position (12) at least partially extends over the opposite longitudinal sides (8) of the stack (2). A method according to claim 3, characterized in that the holding position (12) is applied as a short hose hood with elastic circumferential expansion of the stack (2). Method according to one of claims 3 to 5, characterized in that the holding position (12) is formed from the film material of the first film (14). Method according to one of claims 3 to 6, characterized
in that the retaining layer (12) is formed from a tissue-reinforced film web. Method according to one of claims 3 to 7, characterized
that the retaining layer (12) is formed of a reinforced with a grating structure foil web. Method according to one of the preceding claims, characterized in that prior to coating the first film (14) a bottom reinforcement is placed on the stack (2). Method according to one of the preceding claims, characterized
that the first film (14) from the engaging portions (10) comprising the top (6) to the region of the bottom (22) of the stack (2) is pulled over this and that the second film (20) after turning now after top facing bottom (22) of the stack (16) covering and is pulled over the entire stack of goods (16) substantially. Method according to one of the preceding claims, characterized in that the second film (20) ends in the engagement regions (10). A method according to claim 11, characterized in that the first film (20) at the height of the engagement regions (10) of the film material during coating spanning the referees (28) by driving from the Refffingern (28) associated Reffrollen (30) the engagement areas (10). is supplied. A method according to claim 11 or 12, characterized in that the film material is supplied while a second film (20) deflecting the upper edge of the Refffinger (28) at the upper end of the engagement regions (10). Method according to one of claims 10 to 12, characterized in that the film material is the engagement portions (10) supplied so that the first substantially tangentially two edges (32, 34) of the stack (2) bridging material of the first film (14) and / or the retaining layer (12) in the engagement areas (10) is pushed inwards. Method according to one of the preceding claims, characterized in that the first and / or the second film (14; 20) with an elastic circumferential extent of at least 50%, preferably of at least 70% relative to the unstretched circumference of the film (14, 20) is applied to the stack (2). Method according to one of the preceding claims, characterized
in that the first film (14) and / or the second film (20) is welded off before wrapping the material stack (2) to form a hose hood and separated from a strand feeding the film material of the first and / or second film (14, 20) , Method according to one of the preceding claims, characterized
in that the first film (14), at the level of the engagement regions (10), is supplied to the engagement regions by refursors (30) which are associated with the film material during coating. A method according to claim 17, characterized in that the film material is supplied while a first film (20) deflecting the upper edge of the Refffinger (28) at the lower end of the engagement regions (10). A packaging unit (24) comprising a plurality of layers of stacked packaging articles (4) stacked to form at least two fork leg engaging portions (10) in a stacking plane and having one surface (6) and at least portions of the side surfaces (FIG. 8) enclosing hood made of a first film material (14) and an opposite in this direction over the stack (2) pulled hose hood from a second film material (20), wherein the from the first film (14) and the second film (20) formed hose hood are applied as Stretch hoods to the stack (2).

Images