EP1564143A1 - Device for applying parts of foils from a foil-web on objects - Google Patents

Abstract

The applicator applies parts from a foil strip (30) to objects. It includes a feed device to take the foil strip in a first direction (31), a transporting system to take the object along two tracks running in a second direction (41) at an angled to the first direction, and at least two tools (10, 20) to apply foil strip to the objects. The angle between the first and second directions is firmly preset.

Description

Technical area

The invention relates to a device for applying film parts from a Film tape on objects, comprising means for feeding the film strip along a first direction, a transport system for stepwise transporting the Objects along at least a first track and a second track, wherein the tracks are parallel to each other and extend in a second direction, which to the first Direction an angle includes, and at least two tools for producing the Film parts from the film strip and for applying the film parts to a first object on the first track and on a second object on the second track. The invention relates a tool and a slide for such a device and a Method for applying film parts.

State of the art

Devices of the above type are known. They serve for example for Closing food-filled plastic or aluminum cups through foil lid. Another application is the closing of punched out Openings in prefabricated lids of tinplate or aluminum for appropriate Cans. In this case, a diaphragm closing the opening is so on the lid applied so that it is removable by tearing and so the opening is released. The foil strip can accordingly made of a plastic, a metal or be made of a composite material. So that the band material is well used and not too much waste is obtained, the width of the film strip, the number of Lanes, the angle between the foil strip and the transport direction of the objects as well as the transport movements of the objects and the film strip to each other be matched. In the production of smaller pieces of film, for example, the Number of tracks increased.

In the known devices, the number of tracks is given in principle. If a change in the number of lanes is even possible, it requires one extensive, complex reconstruction of the device. This takes a long time in Claim, so any change to the configuration a significant Production interruption entails. Should slide parts of a different shape and / or Size are made of the film strip, in addition, the angle between the Modified film strip and the transport paths of the objects, so that the film material well can be exploited. But changing the angle also means one high workload.

Presentation of the invention

The object of the invention is to provide a technical field mentioned above associated apparatus for applying film parts of a film strip To create objects that allow quick and easy adaptation to different Shapes and / or sizes of the film parts, a good utilization of the film material and high productivity.

The solution of the problem is defined by the features of claim 1. According to the Invention, the angle between the first direction and the second direction is fixed specified. The transport system has interchangeable slides which extend over which extend at least two parallel paths and the number of parallel tracks and Determine distances between the tracks. The tools are also interchangeable and their transverse distances are changeable. The number of lanes will not be affected by the Device itself, but only by the (interchangeable) slides. The number of lanes can be changed quickly and easily by replacing the slides be changed, it is not a costly conversion required. The adaptation of Configuration to different shapes and / or sizes of the produced Folienteile takes place in the inventive device thus by the exchange of Slides (and, if necessary, a corresponding resetting of the step size) as well as by replacing and / or repositioning the tools. The angle between the foil strip and the transport paths remains unchanged.

The replacement of the slides and / or tools can be done within a very short time, so that by changing the shape or size of the lid to be produced hardly Production interruptions are caused. A complex conversion to change the Number of transport tracks or to adjust the angle between the foil strip and the tracks is not necessary. Accordingly, there is a high productivity, especially for packaging machines, which are often adapted to other lid sizes become. Finally, the device has a high flexibility, so that the existing film material can be optimally utilized.

Advantageously, the fixed angle between the first direction and the second direction 30-60 °, preferably 45-55 °. Such an angle between the Transport direction of the objects and the feeding direction of the film strip allowed on the one hand the conflict-free arrangement of the film feed and the transport system. on the other hand can slide parts of many different shapes or sizes so from the foil tape be prepared that the film material is well used and produces little waste. Particularly advantageous is an angle of about 52 ° has been found.

Preferably, the device for feeding the film strip is designed such that Films of different widths can be processed. The device for feeding for example, can have transport rollers of a certain maximum width, which also allow the supply of foil strips of a smaller width. Thereby the flexibility of the device is increased and optimal utilization of the Foil material allows.

Alternatively, the width of the film strip may be fixed, and the adaptation to different shapes or sizes of the film parts is done exclusively by the Change in the number of tracks, the tool spacing and / or the dimensions of the Slide.

Preferably, the slides are transverse to the second direction, d. H. across to Transport direction of the objects. This allows the coverage of the entire width of the Pathways through the shortest possible slides. Such carriers can also be a simple Have rectangular base and along their long sides of the tracks on Transport system to be attached. This arrangement also allows a easy return transport of the slides, after the foil parts applied and the Objects have been removed from the carriers again.

Alternatively, the main axis of the slide can be oblique to the transport direction of the objects run. In this case, the slides, for example, a parallelogram-shaped Base area up. Optionally, optionally, in the same device rectangular slide perpendicular to the transport direction or parallelogram-shaped, used to slide obliquely arranged slide become. This provides additional flexibility in adapting to other objects.

Advantageously, the device has a cross member on which the tools different transverse positions are fastened. A cross member allows the attachment of the Tools essentially over the entire width of the transport paths. He allows also a simple and inexpensive construction of the device.

Preferably, the cross member at the different transverse positions differently trained recordings on, so that each of the tools only in certain of the Transverse positions can be recorded. This will change the arrangement of the tools impossible in a wrong position.

A device should, for example, a certain number of different container types with Cover different shapes and / or size can close. The to be used Foil width, the number of webs and the position of the tools will now be for each Container or lid type specified so that the fastest possible processing as little scrap as possible is achieved. There is a certain number for each type of lid Tools available, which vary according to the respective predetermined number of tracks directed. A tool for a certain type of lid can now only on the for the each container type predetermined transverse positions on the cross member attach.

On the cross member can be used to attach the tools to the correct position a plurality of groups of pins and / or recesses may be arranged, wherein the Tools have a plurality of recesses and / or pins, which with at least one of the groups of pens and / or recesses can interact. The Pins or recesses of the tool thus act with a group of pins or Recesses on the cross member together like a key with a lock, putting in Recesses of the tool pins of the cross member and / or in recesses of the Cross-member pins of the tool engage.

Alternatively, the recording of the tools on the cross member takes place at different shaped profiles. Also, the recordings can all be identical, with the correct positioning of the tools, for example by markings or a Color coding is supported. The tools can also take place on a cross member also, for example, on lateral holding elements or facing inwards, over the Transportation tracks arranged cantilevers be fastened. The positioning and / or the replacement of tools can be automated, eg. B. by the tools are slidably mounted on a transverse rail, and by tools between the rail and a tool magazine can be replaced.

A tool for producing a film part from a film strip, in particular by Punching, and applying the foil tape to an object is in its transverse position changeable attachable to the inventive device. The tool can For example, in addition to the punch a heating element for sealing the lid and / or a die for stripping the lid from the punching tool.

For attachment to the inventive device, the tool with advantage a plurality of recesses and / or pins, which with one on the device arranged group of pins and / or recesses can cooperate.

A slide for use in the device according to the invention may be at least two objects, for example cup-shaped containers or prefabricated, with a membrane to be provided cover. It is mounted replaceably on the device. The number of tracks in the device is determined by the number and arrangement of the Slides held objects determined, the carrier can, for example, transverse to the Run tracks and carry in a row a number of objects, which the number Tracks corresponds.

a) Das Folienband wird entlang einer ersten Richtung zugeführt.

b) Die Objekte werden entlang mindestens einer ersten Bahn und einer zweiten Bahn schrittweise transportiert, wobei die Bahnen parallel zueinander sind und in einer zweiten Richtung verlaufen, welche zur ersten Richtung einen fest vorgegebenen Winkel einschliesst.

c) Die Folienteile werden aus dem Folienband hergestellt und auf ein erstes Objekt auf der ersten Bahn und auf ein zweites Objekt auf der zweiten Bahn aufgebracht.

d) Die Objekte werden in auswechselbaren Objektträgern gehalten, die sich über die mindestens zwei parallelen Bahnen erstrecken und die Anzahl paralleler Bahnen und Abstände zwischen den Bahnen bestimmen.

A method for applying foil parts from a foil strip to objects comprises the following steps:

a) The film strip is fed along a first direction.

b) The objects are transported stepwise along at least a first track and a second track, the tracks being parallel to each other and extending in a second direction which includes a fixed predetermined angle to the first direction.

c) The film parts are made from the foil tape and applied to a first object on the first web and to a second object on the second web.

d) The objects are held in exchangeable slides extending over the at least two parallel tracks and determining the number of parallel tracks and distances between the tracks.

From the following detailed description and the totality of the claims result in further advantageous embodiments and feature combinations of Invention.

Brief description of the drawings

Fig. 1

eine schematische Ansicht einer erfindungsgemässen Vorrichtung;

Fig. 2A-C

eine schematische Darstellung des erfindungsgemässen Verfahrens;

Fig. 3

eine schematische Darstellung der Konfiguration der Objektträger und der Folienbahn;

Fig. 4A-C

schematische Darstellungen verschiedener möglicher Konfigurationen bei vorgegebener Gesamtbreite der Objektträger und vorgegebenem Winkel zwischen der Transportrichtung und der Richtung der Folienbahn;

Fig. 5

eine schematische Darstellung der Befestigung eines Werkzeugs der erfindungsgemässen Vorrichtung; und

Fig. 6

eine schematische Darstellung verschiedener möglicher Konfigurationen von Werkzeugen.

The drawings used to explain the embodiment show:

Fig. 1

a schematic view of an inventive device;

Fig. 2A-C

a schematic representation of the inventive method;

Fig. 3

a schematic representation of the configuration of the slide and the film web;

Fig. 4A-C

schematic representations of various possible configurations for a given total width of the slide and a predetermined angle between the transport direction and the direction of the film web;

Fig. 5

a schematic representation of the attachment of a tool of the inventive device; and

Fig. 6

a schematic representation of various possible configurations of tools.

Basically, the same parts are provided with the same reference numerals in the figures.

Ways to carry out the invention

FIG. 1 is a schematic view of a device according to the invention. Shown are two tools 10, 20 for producing film parts from a Foil tape 30 and for applying the film parts on cup-like containers and their Storage and operation. The device comprises further elements (not shown), namely a device for feeding the film strip 30 made of plastic, metal or a composite material which can be formed in a manner known per se, for example, by two pairs of rollers arranged in front of and behind the workstation, which can convey the film strip 30 stepwise in a film conveying direction 31. Another element is a transport system for transporting on slides held container in a transport direction 41. This transport system is below the web of the film strip 30 is arranged.

The tools 10, 20 have essentially cubic bearing housings 11, 21 on, in which the punches are mounted vertically displaceable on ball guides. The punches are at the bottom of vertically oriented actuators arranged. The upper portions of these actuators pass through the Upper sides of the bearing housings 11, 21 therethrough, and at the upper ends is one each Flange 12, 22 attached. The tools 10, 20 further comprise a cooling device for the punches, which ensures that the punched-out foil parts easily from release the stamps. This detachment process is performed by scrapers 13, 23 supported, which between the bearing housings 11, 21 and the film strip 30th are arranged and on which the film parts when moving back the stamp be stripped off. The tools 10, 20 also comprise of the punches Independent heating devices for sealing the stamped foil parts on the Container edge. For this purpose, the film strip 30 on its underside a appropriate paint on.

The tools 10, 20 are removably attached to a frame 50. To this Purpose, the frame 50 has a transversely to the transport direction 41 arranged Breakthrough 51, the width of the width of the bearing housing 11, 21 of the tools 10, 20 corresponds. Along the longitudinal sides of the opening 51, the frame 50 has a plurality cylindrical openings 52 on. As in FIG. 5, using the example of the tool 10 illustrated, the bearing housing 11 at its lower end lateral flanges 14 a, 14b, on which upwardly facing pins 15a, 15b are arranged. The Dimensions and distances of these pins 15a, 15b correspond to the dimensions and Distances of the openings 52, so that the tool 10 are attached to the frame 50 can, by the pins 15 a, 15 b engage from below into the openings 52. There are the lateral flanges 14a, 14b of the bearing housing 11 directly at the bottom of the Frame 50 on. The pins 15a, 15b have a thread in their uppermost section, so that the tool 10 by means of nuts 15a, 15b in the opening 51 of the frame 50th can be releasably attached. The fixation of the tool 10 may alternatively for example, by above the frame 50 to the pins 15a, 15b arranged Clamps or by a screw connection between the pins 15 a, 15 b and the Openings 52 take place. The second tool 20 is in the same way on the frame 50th attached like the first tool 10.

The tools 10, 20 are arranged by a transversely disposed above the bar 60 actuated. This is horizontal and oblique to the opening 51 and thus obliquely to the Tools 10, 20 arranged. This creates more space and the Slide guides can be placed as close as possible to both sides of the tools become. The crossbar 60 has two flange connectors 61, 62 on its underside. This is the top of the actuators of the punches arranged Flanges 12, 22 fixed immovably, allowing the movement of the punch through the crossbar 60 is positively controlled. The crossbar 60 is with a linear drive (not shown) coupled, which causes its vertical up and down movement 63.

At the bottom of the frame, between the foil strip 30 and the containers to be closed a die carrier 53 is arranged with a plurality of dies with which the Punches during punching and applying the film parts cooperates.

The frame 50 can be together with the tools used 10, 20 by one Fold swivel axle 54 up. The crossbar 60 can be decoupled from its drive so that it can be folded up together with the frame 50. To the Replacing the tools 10, 20 are first the flanges 12, 22 of the tools 10, 20 of the flange connectors 61, 62 on the crossbar 60 solved. Subsequently, the Frame 50 folded up to an angle of at least 90 °. Then the Fasteners for the tools 10, 20 solved and the tools 10, 20 of taken from below. New tools will turn into the below Breakthrough introduced, and fixed at its predetermined position. Now the Frame 50 and the crossbar 60 folded down and by means of a lock 55th fixed. Finally, the new tools are fixed to the flange connectors 61, 62 and the drive is again coupled to the crossbar 60.

In Figures 2A-C, the inventive method is shown schematically. The Film strip 30 is supplied stepwise along a film conveying direction 31. to better orientation is an arbitrary transverse line 32 of the film strip 30 by a indicated by dashed line. To be closed containers 71, 72, ... are in Slides 81, 82, ... held, which along a transport direction 41 stepwise be transported. The transport direction 41 and the film conveying direction 31 close an angle of about 50 °. All slides 81, 82, ... are identical, for holding two transversely arranged containers 71, 72, ... are formed. For example, cups a slightly conical, upwardly widening shape can be closed These are simply held by placing them in openings whose Shape and size correspond to a cross-section at a certain height of the cup.

FIG. 2A shows the beginning of a packaging process. The first to be closed Containers 71, 72 are held in the second slide 82. This is located in the Working position, d. H. he is positioned so that the container 71, 72 directly below the Punching tools are located. During the closure of the container 71, 72 with a Foliendeckel are briefly both the film web 30 and the slides 81, 82nd quiet. The punching tools are lowered so that in cooperation with the arranged below the film web 30 matrices from the film web 30 simultaneously two Film parts are made of round shape. The punching tools are then withdrawn, with the scraper arranged above the film web it is avoided that the film parts adhere to the punching tools. Next Now the heaters of the tools are operated to push the lids on the edges the container 71, 72 to seal. Finally, the heater of the Retracted container edges.

Once these steps have been carried out, both the film web 30 along the film conveying direction 31, as well as the slides 81, 82 along the Transport direction 41 are transported one step further. It turns out in the Figure 2B illustrated situation. The second slide 82 is now at the previous position of the first slide 81, and a third slide 83 with the Containers 73, 74 now occupies the working position below the tools. The Film web 30 has been transported so far that by the punching process resulting holes 91, 92 are removed from the work area, d. H. from that Area in which the film parts are to be punched out in the following step.

It concludes now again a step at which the container 73, 74 with Foliendeckeln be closed.

FIG. 2C shows the situation after the further transport of the film web 30 and the slide 82, 83. It is clearly visible that in the film web 30th resulting holes 91, 92, 93, 94 are arranged so that only very little rejects of the film material is obtained. In principle, the packaging process can last so long in the continue to be shown how film can be nachgefördert. After application the cover and the transport of the slides 81, 82, ... from the working position the containers 71, 72, ... are removed from the slides 81, 82, ... and removed from the Device carried away. The empty slides 81, 82, ... are then returned to brought a loading position and there again provided with containers. Of the Return transport takes place in a known per se, for example, the Transport system formed by a circulating below the working plane conveyor belt to which the slides are attached, or the slides are from the Uncoupled transport system and by a separate mechanism asynchronous to Loading location transported back.

Figure 3 is a schematic representation of the configuration of the slides and the Sheet. Shown are some typical given and variable parameters of Device for applying the film parts, the film web 30 and carried out Process. In the inventive device, the angle α between the Foil conveying direction 31 and the transport direction 41 of the slides 81, 82 fixed specified. Shown in FIG. 3 is the angle β, which corresponds to the angle α added to a right angle, d. H. α + β = 90 °. For a specific packaging process In addition, the diameter D of the punched out foil parts is specified. Of the For the sake of simplicity, we will proceed to the schematic illustration in FIG circular film parts out. Of course, the most manufacturable Cover but a more complicated shape, z. B. because in addition pull tabs formed should be, or because otherwise, for. B. rectangular shaped container can be closed should. But this only has the consequence that in addition the orientation of relevant to be punched film parts. This should be chosen so that as possible little waste is produced. Depending on the form and orientation, another results effective value of the diameter D.

The diameter D determines together with the maximum width of the slide 81, 82 and the maximum width of the film web 30, which number N of tools can be arranged side by side, d. H. how many parts of the film are produced at the same time and can be applied to the containers. Starting from the diameter D of Foil parts and the number N of tools a film width B is selected, which approximately the arrangement of N film parts of diameter D transverse to Film conveying direction 31 allowed. By choosing the angle γ between the transverse direction of the Foil tape and the connecting line of the centers juxtaposed Foliateile, the division can be optimized so that the side of the punched out Folienteile as narrow a residual strip remains. However, this is true Make sure that it is necessary in conventional devices for feeding the foil strip 30 is that a minimal strip remains on both sides, so that the film in the work area always be curious.

From the parameters α, D, N, B and γ, the distance A between the containers 71, 72, the step size V _{B of} a transport step in the transport direction 41 and the step size V _{F of} the device for further conveying the film strip are now clear for optimum strip utilization 30. The slides 81, 82 are thus selected so that the containers 71, 72 held therein have a distance A, and the device is controlled so that the particular increments V _B , V _{F are} maintained.

Figures 4A-C are schematic representations of various possible configurations for a given total width of the slide and a predetermined angle between the transport direction and the direction of the film web. The predetermined angle β is approximately 38 ° in the example shown. Figures 4A, 4B show the closure of the same container with a diameter D ₁ , wherein in the first case (Figure 4A) two containers 71, 72 are arranged side by side at a distance A ₁ on a slide 82 and in the second case (Figure 4B) three containers 71 ', 72', 73 'at the same distance A ₁ side by side on a slide 82'. The film width B ₂ in the second case is chosen correspondingly wider than the film width B ₁ in the first case.

In the third case, shown in FIG. 4C, containers 7 1 ", 72" with a larger diameter D ₂ are intended to be closed by foil covers. The dimensions of the device allow in this case only the simultaneous production and attachment of two lids. Therefore, only two covers are punched side by side out of the film web, and a corresponding film with the film width B _{3 is} selected. The distance A ₂ between the containers is selected so that the film parts to be punched out are arranged on the film web such that, while the film does not tear during the packaging process, but at the same time as little rejects as possible are produced.

The parameter values given in the following table for the configurations shown in FIGS. 4A-C are to be understood as examples only. The angle β is constant 38 °: Conf. D [mm] N B [mm] A [mm] V _B [mm] V _F [mm] γ [°] A 72 2 161 119.5 89 79 12 B 72 3 234 119.5 89 79 12 C 98 2 206 158 120 101 13

Figure 6 is a schematic representation of various possible configurations of tools. In turn, the configurations AC according to the above table are shown. For the configurations A and B, tools for making and sealing lids with a diameter D ₁ of 72 mm and for the configuration C tools for lids with a diameter D ₁ of 98 mm are required. In the example shown, two pins pointing upwards are arranged on the lateral flanges, in the first case with a distance of 80 mm, in the second case with a distance of 100 mm. In order that the tools according to the configurations AC can be fixed in the opening 51 of the frame 50, openings 52 are to be arranged as shown in FIG. For the sake of clarity, the recesses 52 for the larger tool are shown as triangles, those for the smaller tool as circles symbolically. Starting from a symmetrical arrangement of the tools in the transverse direction, recesses must be arranged on both sides of the symmetry axis at intervals of 19.75, 29, 40, 79.5, 99.75, 129 and 159.5 mm. As can be easily determined by the distances, the tools can be fixed only at positions corresponding to the configurations AC. An incorrect positioning is not possible. Of course, additional openings may be arranged along the aperture 51 to allow for further configurations. The positioning of the tools can be further simplified by markings and / or different cross-sectional shapes of the pins.

The invention is not limited to the illustrated embodiment. The Arrangement and operation of the punches can be done differently, for example The tools can be driven individually and synchronized by a central control to be controlled. The tools can also be in a different way above be attached to the film web, z. B. on the top of a frame or at an angle running rails.

In addition to the shown a variety of other configurations of the slide is possible. In particular, containers can be closed with a Foliendeckel, in where the opening to be closed is not substantially round. In this case Create the inventive device and the inventive method a great flexibility in the arrangement of the punched out foil parts on the foil strip; For example, the successive slides do not all need to be the same be, the holding elements for the containers can have different transverse positions and / or have different distances, or the slides are inclined to the Transport direction arranged. Also the simultaneous closure different Shaped openings is possible when the slides are holding elements for have different containers. A single slide can also have several have parallel rows with holding elements for containers, which in a row to be edited.

The device according to the invention can also be punched out for closing Openings in prefabricated lids, such as tinplate or aluminum, deploy. In this case, a diaphragm closing the opening is so on the lid applied that the user can remove them by tearing and so on Opening is released. The thus processed lid are on appropriate Cans of tinplate or aluminum applied.

In summary, it should be noted that the invention provides a device for Application of film parts is created from a foil strip on objects, which a quick and easy adaptation to different shapes and / or sizes of the Film parts, a good utilization of the film material and a high productivity allows.

Claims (11)

Device for applying film parts from a film strip (30) to objects (71 ... 76) comprising a) means for feeding the film strip (30) along a first direction (31); b) a transport system for stepwise transporting the objects (71 ... 76) along at least a first path and a second path, wherein the tracks are parallel to each other and in a second direction (41) extending to the first direction (31) Includes angle (α); c) at least two tools (10, 20) for producing the film parts from the film strip (30) and for applying the film parts to a first object (71) on the first web and to a second object (72) on the second web;
characterized in that d) the angle (α) between the first direction (31) and the second direction (41) is fixed; e) that the transport system has replaceable slides (81 ... 84) extending over the at least two parallel tracks and determining the number of parallel tracks and spaces between the tracks; and f) that the tools (10, 20) interchangeable and their transverse distances are changeable. Apparatus according to claim 1, characterized in that the fixed predetermined angle (α) between the first direction (31) and the second direction (41) is 30-60 °, preferably 45-55 °. Apparatus according to claim 1 or 2, characterized in that the means for feeding the film strip is formed such that film strips (30) of different widths can be processed. Device according to one of claims 1 to 3, characterized in that the slides (81 ... 84) extend transversely to the second direction. Device according to one of claims 1 to 4, characterized by a cross member (50) on which the tools (10, 20) can be fastened at different transverse positions. Apparatus according to claim 5, characterized in that the cross member (50) at the different transverse positions differently shaped receptacles (51, 52), so that each of the tools (10, 20) can be accommodated only in certain of the transverse positions. Apparatus according to claim 5 or 6, characterized in that for fixing the tools (10, 20) on the cross member (50) a plurality of groups of pins and / or recesses (52) are arranged and that the tools (10, 20) a plurality of recesses and or pins (15a, 15b) which can cooperate with at least one of the groups of pins and / or recesses (52). Tool (10, 20) for producing a film part of a film strip (30), in particular by punching, and for applying the film part to an object (71 ... 76), for a device according to one of claims 1 to 7, characterized in that , in its transverse position , it can be fastened variably to the device. Tool according to claim 8, characterized in that it has for attachment to the device a plurality of recesses and / or pins (15a, 15b) which can cooperate with a device arranged on the group of pins and / or recesses (52). Slide (81 ... 84) for a device according to one of claims 1 to 7, characterized in that it can accommodate at least two objects (71 ... 76), in particular cup-like container, and that it be mounted replaceable on the device can. Method for applying film parts from a film strip (30) to objects (71 ... 76), wherein a) the foil strip (30) is fed along a first direction (31); b) the objects (71 ... 76) are transported stepwise at least along a first path and a second path, the paths being parallel to each other and extending in a second direction (41) which is fixedly predetermined to the first direction (31) Includes angle (α); c) the film parts are made from the film web (30) and applied to a first object (71) on the first web and to a second object (72) on the second web; d) wherein the objects (71 ... 76) are held in interchangeable slides (81 ... 84) extending over the at least two parallel tracks and determining the number of parallel tracks and spaces between the tracks.

Images