WO2018177572A1

WO2018177572A1 - Perforating unit and method for perforating a flat-folded film tube

Info

Publication number: WO2018177572A1
Application number: PCT/EP2017/076725
Authority: WO
Inventors: Thomas Eggl; Florian Lang; Johannes Strauss; Bernd Braatz; Robert Krieger; Martin Kupka
Original assignee: Krones Ag
Priority date: 2017-03-28
Filing date: 2017-10-19
Publication date: 2018-10-04
Also published as: EP3600803B1; CN110520265B; DE102017205180A1; EP3600803A1; CN110520265A

Abstract

The invention relates to a perforating unit and a method for perforating a flat-folded film tube. The perforating unit comprises a continuously rotatable magnetic cylinder and impression cylinder, and a flexible stamped metal sheet which is magnetically fastened to the magnetic cylinder and has cutting lines for perforating the film tube. Owing to the fact that a control system for the magnetic cylinder is also provided, using which control system the peripheral speed of the cutting lines can be adjusted to a transport speed of the film tube when the magnetic cylinder is in the active region with the impression cylinder and in contrast can be changed when outside said active region, different perforations can be produced in a flexible and economical manner at different distances along the film tube. The stamped metal sheets also allow a cost-effective format change on the perforating unit.

Description

Perforating unit and method for perforating a flat-folded film tube

The invention relates to a perforator and a method for perforating a flat-folded film tube.

As is known, labels can be produced from sheet-like materials by passing the material to be punched between a rotating punching cylinder and an impression cylinder. Here, the processing of multilayer materials is possible, for example, for selective punching of self-adhesive labels on a carrier tape. The stamping of sandwich labels, so-called piggybacks or the like, is known in principle. For this purpose, for example, sheaths are formed with different heights on the punching cylinder.

Flexible punching devices with adjustable gap between punching cylinder and impression cylinder are disclosed, for example, in DE 10 2004 032 030 A1, DE 10 2010 026 607 A1 and US 2007/101844 A1.

DE 10 201 1076 863 A1, DE 10 2014 216 191 A1 and DE 10 2015 204 821 A1 further discloses the transverse perforation of films, in particular of flat longitudinally folded film tubes, by means of punching cylinders and counter-pressure cylinders. Such perforations serve, for example, the separation of label sleeves for containers by tearing off by means of longitudinal tension. The described perforators are suitable for a continuous transport of film webs with a comparatively high processing speed.

However, so far only transverse perforations could be made in this way. In contrast, longitudinal perforations require a gradual and correspondingly slow transport of the film webs.

For example, for the production of tear tabs on beverage labels, a faster and combined production of longitudinal perforations and transverse perforations would be desirable. In addition, different perforations with the lowest possible outlay on equipment and in a flexible manner to one and the same perforating are to be made.

Therefore, there is a need for improved perforating and perforating processes for film tubes based on rotary cutting and counter-pressure rollers. The object is achieved with a perforating according to claim 1. Accordingly, this is suitable for processing a longitudinally folded film tube and comprises a continuous rotatable magnetic cylinder and a counter-pressure cylinder and a magnetically attached to the magnetic cylinder flexible punching sheet with cutting lines for perforation of the film tube. Furthermore, a control for the magnetic cylinder is provided with which the peripheral speed of the cutting lines can be adjusted in the effective range with the impression cylinder to a transport speed of the film tube and outside of the effective range can be changed.

Consequently, one can adapt the working cycle of the perforating to the transport speed of the film tube and to a predetermined distance between the perforations to be produced with the cutting lines. The film tube is in this case transported at a constant speed through the perforator. The magnetic cylinder rotates continuously, but with variable speed, so that the peripheral speed of the cutting lines varies in a controlled manner between the individual punching operations.

Preferably, the control for adapting the peripheral speed is formed outside the effective range as a function of a label length to be produced. For example, tear-off perforations at a distance of a predetermined label length in the film tube can thereby be produced, although the distance between the associated cutting lines on the stamped sheet deviates therefrom.

For an increase in the label length to be produced, the peripheral speed outside the effective range would be reduced, for example. It then takes correspondingly longer, until the cutting lines come back into the effective range with the impression cylinder. At a constant transport speed, the perforations produced by the cutting lines are then further apart in the longitudinal direction of the film tube. Conversely, this also applies to a reduction of the label length to be produced in each case.

Preferably, the cutting lines extend in a first region of the stamping sheet in the transverse direction and / or longitudinal direction and in particular are so high that only the wall of the film tube facing the stamped sheet is perforated. Thus, for example, a pull-tab and / or a tear-open line can be formed, in particular only in the wall of the film tube facing the magnetic cylinder and the stamped sheet, while the wall of the film tube lying behind remains substantially intact. Instead However, the cutting lines can also be so high that both walls of the film tube are perforated for the production of tear tabs / lines.

Preferably, the cutting lines extend in a second region of the punching plate only in the transverse direction and are in particular at least so high that both superimposed walls of the film tube are perforated over its entire width, with the foil tube laterally delimiting folding edges. This makes it possible to form tear-off perforations for the subsequent singulation of the film tube to label sleeves.

The cutting lines may be lower in the first region than the cutting lines in the second region.

The cutting lines of the second region weaken the material of the film tube more particularly in its longitudinal direction than the cutting lines of the first region. Consequently, tear-off perforations at longitudinal tension in the film tube produced with the cutting lines of the second region, in particular when singulated to label sleeves, break more readily than the tear tabs and / or tear lines produced with the cutting lines of the first region. The latter remain intact when singling.

For this purpose, the cutting lines of the second region produce, for example, larger perforation holes than the cutting lines of the first region and / or a smaller spacing between directly adjacent perforation holes.

Preferably, the perforating further comprises flexible punching plates with different cutting lines, which can alternatively be magnetically attached to the magnetic cylinder for producing different perforation pattern in the film tube. The stamping sheets can be provided comparatively inexpensively as clothing parts for the production of different labels and perforation patterns and replaced when worn.

Preferably, the perforating further comprises flexible stamping plates with different thickness, which can be alternatively attached to the magnetic cylinder magnetically for the perforation of film tubes of different thickness and / or different material. The stamping sheets are then provided in the form of interchangeable clothing parts. The thickness of the stamped sheets then depends, for example, on a predetermined gap between the magnetic cylinder and the impression cylinder and the thickness of the film tube to be perforated. The stated object is also achieved by a method according to claim 7. Accordingly, this is used for perforating a flat-folded film tube, wherein the film tube runs at a particular constant transport speed between at least one impression cylinder and magnetic cylinder with it magnetically fixed punching sheet through and is perforated by formed on the punching sheet cutting lines. Furthermore, the peripheral speed of the cutting lines in the effective range with the impression cylinder is adapted to a transport speed of the film tube and changed outside of the effective range on the other hand. For this purpose, the angular velocity of the magnetic cylinder is changed according to the required peripheral speed of the cutting by means of electrical control. Thus, the advantages described with respect to claim 1 can be achieved.

Preferably, the rotational speed of the magnetic cylinder is changed periodically between a first rotational speed for contact of the cutting lines with the film tube and at least a second non-contact rotational speed. This allows the production of similar labels with a certain length and arrangement of the individual perforations on the label with simultaneous continuous transport of the film tube.

Preferably, combined transverse / longitudinal perforations are selectively produced in the wall of the film tube facing the magnetic cylinder and / or in both superimposed walls of the film tube, in particular for the formation of tear tabs and / or tear lines. For this purpose, in the punching plate both in the transverse direction and in the longitudinal direction, that is, for example, obliquely, extending cutting lines are formed, which roll on the film tube to its perforation. This allows a particularly efficient production of tear tabs on label sleeves for containers. Tear tabs and tear lines serve to secure the closure or the like on the finished labeled product, tear-off perforation, however, the separation of the label sleeves.

Preferably, transverse perforations reaching functionally over the entire width of the film tube are produced in both superimposed walls of the film tube, with the gap being laterally delimited by the film tube. This serves to generate predetermined tear lines for the subsequent singulation of the film tube to label sleeves. The separation is then possible with continuous further transport of the film tube by tearing off by means of longitudinal tension over the entire width of the film tube. The folding edges are then not interrupted on the outside by perforation holes or similar punched out. Preferably, the transverse perforations resist a lower longitudinal tension in the film tube than the transverse / longitudinal perforations. As a result, it is possible to avoid that the perforation lines for the tear-open tabs are already separated during singulation. The tear-open tabs should only be torn open in the intended use of the finished labeled product.

Preferably, the transverse perforations and the transverse / longitudinal perforations are made on the same magnetic cylinder. There are then formed correspondingly shaped cutting lines for the production of both perforation on one and the same punching plate. This allows a particularly efficient production of tear tabs and singulation perforations, as well as a particularly precise arrangement of the transverse perforations and the transverse / longitudinal perforations to each other.

Preferably, the peripheral speed outside the effective range for positional adjustment of the transverse perforations and / or transverse / longitudinal perforations in the longitudinal direction of the film tube is purposefully reduced or increased. This allows a fast format adaptation of the perforating unit by programmed change of the rotational speed of the magnetic cylinder.

Preferably, the film tube is a shrink tube or an elastic tube for labeling containers. By way of example, the film tube can be designed for labeling and / or securing the closure of a closure region and / or neck region of a container.

Preferably, the stamped sheet is exchanged for the production of differently perforated label sleeves and / or for perforation of different film tubes. This allows a flexible and economical production of different labels. In particular, an exchange of the magnetic cylinder for a format change is not required. Instead, different flexible punching plates for format change on the magnetic cylinder can be easily fixed by magnetic force and changed accordingly fast.

A preferred embodiment of the invention is shown in the drawing. Show it:

Figure 1 seen a schematic view of the perforating in the transport direction of the film tube;

Figure 2 is a schematic side view of the magnetic cylinder and the impression cylinder in the periodic speed change; Figure 3 is a schematic plan view of a stamped sheet and thus perforated film tube; and

Figure 4 is a schematic plan view of a stamped sheet and a perforated therewith

Film tube.

As can be seen from FIG. 1, in a preferred embodiment, the perforating unit 1 comprises a magnetic cylinder 2, a counter-pressure cylinder 3 and a flexible punching plate 4 magnetically fixed to the magnetic cylinder 2. On the punching plate 4 is a schematically indicated cutting line 5 for perforating one through the perforating unit 1 in the transport direction 6a running film tube 6 is formed.

As becomes clear in FIG. 1 in a schematically exaggerated illustration, the film tube 6 is folded flat in the longitudinal direction and therefore, when passing through the perforating unit 1, has a wall facing the stamped sheet 4 and a wall facing the impression cylinder 3.

As the figure 1 further illustrates, at least the magnetic cylinder 2 by means of electric motor 7, which is preferably a servo motor driven. The rotational speed DG, for example in the form of the angular velocity, of the magnetic cylinder 2 can be influenced in a targeted manner by controlling the motor 7 by means of a control 8.

As the figure 2 can be seen in a schematic representation, different rotational speeds DG1, DG2 can be specified for individual rotational positions of the magnetic cylinder 2, between which the angular velocity DG in the current working operation then periodically fluctuates with each revolution of the magnetic cylinder 2.

The flexible stamped sheet 4 comprises at least a first region 4a in which first cutting lines 5a extend in both the transverse direction Q and in the longitudinal direction L. This is to be understood in particular as meaning that the first cutting lines 5a can also run obliquely, that is to say in a combination of the transverse direction Q and the longitudinal direction L.

Additionally or alternatively, at least one second region 4b is formed on the flexible stamped sheet 4 with a second cutting line 5b extending only in the transverse direction Q.

In the example shown, two second regions 4b with identical second cutting lines 5b are circumferentially uniformly distributed relative to one another on the stamped sheet metal for the production of Abreißperforationen formed in the film tube 6 with identical distances from each other.

In the example shown, two first regions 4a with identical first cutting lines 5a are also formed on the stamped metal sheet in circumferentially uniform distribution relative to one another for producing tear-open tabs. The first cutting lines 5a could under this condition be arranged arbitrarily on the stamped sheet 4, ie between the second cutting lines 5b.

The peripheral speed UGa of the first cutting lines 5a and the peripheral speed UGb of the second cutting lines 5b are substantially identical to the transport speed 6a of the film tube in the effective region with the impression cylinder 3, or in other words, when in contact with the film tube 6 passing through the perforating unit 1 6. The magnetic cylinder then rotates at a first rotational speed DG1.

On the other hand, the peripheral speed UGa, UGb of the first cutting lines 5a, 5b, outside the effective area 9, that is, when the first cutting lines 5a, 5b do not contact the film tube 6, can be changed. This is preferably done by deceleration or acceleration of the magnetic cylinder 2 to the second rotational speed DG2.

Depending on the number and position of the first cutting lines 5a, 5b, the controller 8 thus adjusts the rotational speed DG periodically between the first rotational speed DG1 and the second rotational speed DG2. In between, any gradients of the rotational speed DG are possible in principle.

In FIG. 2, circumferential sections of the punching plate 4, which move through the effective region 9 at the first rotational speed DG1, are hatched. Umfängliche sections moving with deviating rotational speed DG through the effective range, for example, with the second rotational speed DG2 are marked in black. This is merely a schematic clarification.

Consequently, it can be adjusted how far the film tube 6 is transported between the individual perforation processes with the first and second cutting lines 5a, 5b. On the assumption of a substantially constant transport speed 6a of the film tube 6, the distance between the transverse / longitudinal perforations 10a and transverse perforations 10b produced with the first and second cutting lines 5a, 5b on the film tube 6 is thus set. In the example shown, a transverse / longitudinal perforation 10a for a tear-open tab is produced by the first cutting lines 5a in each case only through the wall 6b of the film tube 6 facing the magnetic cylinder 2. On the other hand, a transverse perforation 10b extending through both walls 6b, 6c of the film tube 6 is produced over the entire width of the film tube 6 with the second cutting lines 5b. The height Ha of the first cutting lines 5a in this case is smaller than the height Hb of the second cutting lines 5b.

However, it is also possible to produce with cutting lines 5a of suitable height Ha through both walls 6b, 6c of the film tube 6 reaching transverse / longitudinal perforation 10a for tear tabs or the like.

The transverse perforations 10b are used for segmenting the film tube 6 in still hanging label sleeves, which can be torn off, for example, by means of suitable longitudinal tension downstream of the perforating 1 from the film tube 6 successively for labeling containers or the like.

The transverse perforations 10b are preferably designed to tear apart at a lower longitudinal tension in the film tube 6 than the transverse / longitudinal perforations 10a for the tear tabs. The latter should tear only when the intended use of the finished labeled product, but not during the separation of the film tube 6 to labels.

Depending on the label length to be set, the rotational speed UGa, UGb of the cutting lines 5a, 5b can be flexibly adjusted by changing the rotational speed DG outside the effective region 9. For this purpose, corresponding periodic rotational speed profiles for the magnetic cylinder 2 can be stored in the controller 8. These can then be retrieved format-dependent for individual label types to be produced.

FIG. 3 schematically shows a possible arrangement of the first and second cutting lines 5 a, 5 b in the associated regions 4 a, 4 b of the stamped sheet 4 in the plan view of the stamped sheet 4 developed flat.

FIG. 3 also illustrates the positional adaptation of the transverse / longitudinal perforations 10a to one another and the transverse perforations 10b to one another by varying the rotational speed DG. Accordingly, the distances 12b between the transverse perforations 10b specifically deviate from the distances 11b between the cutting lines 5b. In the example for this purpose, the transverse / longitudinal perforations 10a and the transverse perforations 10b in pairs with the punched first rotational speed DG1 and the magnetic cylinder 2 temporarily temporarily braked to the second rotational speed DG. The distance 12b corresponds to a label length after singulation along the transverse perforations 10b.

FIG. 4 schematically illustrates a further possible arrangement of first cutting lines 51 a, 52 a and second cutting lines 51 b in associated first regions 41 a and second regions 41 b of a flexible stamping sheet 41 in the flat unwound state.

The first cutting lines 51 a, 52 a are preferably formed for a perforation through both walls 6 b, 6 c of the film tube 6. The first cutting lines 51 a, 52 a of a particular punching plate 41 may be formed for different widths and / or long punched out. This is indicated schematically in FIG. In principle, however, it is also possible to form the first cutting lines 51 a, 52 a with different height Ha or with different total thickness of the punching plate 41.

Thus, an obliquely running in the example transverse / longitudinal perforation 101 a for a tear tab and in the example orthogonally oriented transverse / longitudinal perforation 102 a are generated for a tear line. The tear line is designed to tear open the finished labeled product substantially in the transverse direction Q. The tear-open line differs from the tear-off perforation, ie the transverse perforation 101b, essentially in that it is designed for successive tearing along the transverse / longitudinal perforation 102a. For example, tear lines could also be skewed.

The second cutting lines 51 b of the punching plate 41 are also formed for a perforation through both walls 6 b, 6 c of the film tube 6 and thus for the production of transverse perforations 101 b. These serve as Abreißperforationen for the separation of the film tube 6 to labels.

The cutting lines 51 b, 51 a and 52 a are configured so that the tear-off perforations produced at a lower longitudinal tension in the film tube 6 tear than the generated tear lines and / or tear tabs, so that the tearing lines and / or tear tabs remain intact during singulation.

As can be seen schematically from FIG. 4, the first cutting lines 51 a, 52 a and the second cutting lines 51 b are formed such that the laterally delimiting folding edges 6 d of the film tube 6 are not perforated on the outside. Nevertheless, the transverse perforations 101 b functionally extend over the entire width of the film tube 6 a proper separation and prevents the other damage to the film tube 6 and / or problems in conveying the perforated film tube 6 in the region of the fold edges 6d.

FIG. 4 illustrates the positional adjustment of the transverse / longitudinal perforations 101a, 102a and the transverse perforations 101b by varying the rotational speed DG in analogy to FIG. 3. Accordingly, the distance 121b between the transverse perforations 101b is adjusted by periodically adjusting the rotational speed DG. The distance 121b also corresponds here to a label length after singulation along the transverse perforations 101b.

On the other hand, the distance 122b between the transverse perforations 101b and the adjacent transverse / longitudinal perforation 102a is constant since they are connected by the oblique transverse / longitudinal perforation 101a and are punched together at the first rotational speed DG1 corresponding to the transport speed 6a of the film tube 6 ,

For producing different labels and / or for processing film tubes 6 of different thickness and / or different materials, different stamped sheets 4, 41 can be provided. The punching plates 4, 41 may with regard to the course of the first cutting lines 5a, 51a, 52a and the second cutting lines 5b, 51b and / or with respect to the height of individual cutting lines 5a, 51a, 52a, 5b, 51b and / or the number of similar cutting lines 5a, 51a, 52a, 5b, 51 b per punching plate 4, 41 and / or differ in terms of the thickness of the punching plate 4, 41.

Different punching plates 4, 41 can be provided comparatively inexpensively as clothing parts. The attachment to the magnetic cylinder 2 is comparatively simple and precise with a low expenditure on equipment possible. For this purpose, a plurality of known magnet zones (not shown) are present on the magnet cylinder 2, which hold the stamping plates 4, 41 in each case rotationally fixed with respect to the magnet cylinder 2 and take it with frictional engagement during operation.

The perforator 1 can be used, for example, as follows.

A film tube 6 folded longitudinally along fold edges 6d is preferably fed by a roller endlessly at a constant transport speed 6a to the perforating unit 1.

The magnetic cylinder 2 is driven by motor 7 and control 8 so that the existing on the punching plate 4, 41 cutting lines 5a, 51a, 52a, 5b, 51b in contact with the film tube 6 (in the effective region 9) each have a peripheral speed UGa, UGb have that essentially corresponds to the transport speed 6a of the film tube 6. The cutting lines 5a, 51a, 52a, 5b, 51b then run with the film tube 6 with.

Depending on the height of the cutting lines 5a, 51a, 52a, 5b, 51b on the stamped sheet 4, 41 are thereby selectively transverse / longitudinal perforations 10a, 101a, 102a generated, which only by a facing wall 6b or by both superimposed Walls 6b, 6c of the film tube 6 extend and / or transverse perforations 10b, 101b, which extend through both superposed walls 6b, 6c of the film tube 6 and thereby functional in particular over the entire width of the film tube 6. Here, the folded edges 6d of the film tube 6 are recessed by perforations or punched holes.

The perforation holes or similar punched holes produced may be punctiform, slot-shaped or the like, depending on the shape of the individual cutting edges of the cutting lines 5a, 51a, 52a, 5b, 51b.

During continuous further rotation of the magnetic cylinder 2 whose rotational speed DG when not acting on the cutting lines 5a, 51a, 52a, 5b, 51b set on the film tube 6 targeted and / or changed to the distances 1 1 b, 121 b, in particular between the transverse perforations 10b, 101b in the longitudinal direction of the film tube 6 set.

For this purpose, the controller 8 sets a speed profile which repeats periodically between rotational speeds DG1 and DG2. Preferably, different speed profiles are stored in the controller 8 for different film formats and label formats.

Depending on the thickness and / or material of the film tube 6 flexible stamping plates 4, 41 are attached to the magnetic cylinder 2 with different thickness. For the production of different transverse / longitudinal perforations 10a, 101a, 102a and transverse perforations 10b, 101b, the punching plates 4, 41 can be exchanged. For this only relatively short set-up times are required.

The perforator 1 is therefore suitable for frequent format changes. In addition, a comparatively high machine performance is possible with permanently continuous belt transport of the film tube 6.

The transverse / longitudinal perforations 10a, 101a, 102a and the transverse perforations 10b, 101b are preferably produced together on one and the same magnetic cylinder 2, optionally but also in succession to different magnetic cylinders 2. The perforating 1 can then include, for example, another pair of magnetic cylinder 2 and impression cylinder 3 with associated motor 7.

The perforated film tube 6 perforated as described above can then be fed to a labeling unit (not shown) in a manner known per se, which separates the film tube 6 into tearing sleeves by tearing off the transverse perforations 10b, 101b and attaches them to containers (not shown).

The film tube 6 may be, for example, a shrink tubing or an elastically stretchable tube which is attached by means of elastic tension on containers.

Claims

claims

1 . Perforating unit (1) for a longitudinally folded film tube (6), with a continuously rotatable magnetic cylinder (2) and counter-pressure cylinder (3) and with a magnetically attached to the magnetic cylinder flexible punching plate (4, 41) with cutting lines (5a, 51a, 52a, 5 b, 51 b) for perforation of the film tube (6), characterized by a control (8) for the magnetic cylinder (2), with the peripheral speed (UGa, UGb) of the cutting lines (5a, 51 a, 52a, 5b, 51 b ) in the effective area (9) with the counter-pressure cylinder (3) to a transport speed (6a) of the film tube (6) adapted and outside the effective range (9) can be changed in contrast.

2. perforator according to claim 1, wherein the controller (8) is adapted to set the peripheral speed (UGa, UGb) outside the effective range (9) in dependence on a label length to be produced.

3. perforating according to claim 1 or 2, wherein the cutting lines (5a, 51 a, 52 a) in at least a first region (4a, 41 a) of the punching plate (4, 41) in the transverse direction (Q) and / or longitudinal direction (L) extend and in particular have such a height (Ha) that they perforate only the the punching plate (4, 41) facing wall (6b) of the film tube (6).

4. perforating according to one of the preceding claims, wherein the cutting lines (5b, 51 b) in at least a second region (4b, 41b) of the punching plate (4, 41) only in the transverse direction (Q) and in particular such a height (Hb ), that they perforate both superimposed walls (6b, 6c) of the film tube (6) functionally over its entire width, with recessing the film tube (6) laterally limiting folding edges (6d).

5. perforating according to one of the preceding claims, further comprising flexible punching plates (4, 41) with different cutting lines (5a, 51 a, 52 a, 5 b, 51 b), which alternatively for producing different perforation in the film tube (6) on the magnetic cylinder ( 2) can be fixed magnetically.

6. perforating according to one of the preceding claims, further comprising flexible punching plates (4, 41) of different thickness, which can be attached to the perforation of film tubes (6) of different thickness and / or different material alternatively magnetically attached to the magnetic cylinder (2).

7. A method for perforating a flat-folded film tube (6), wherein the film tube (6) with a particular constant transport speed (6a) between at least one impression cylinder (3) and a magnetic cylinder (2) with a magnetically attached stamped sheet (4, 41) passes through and thereby on the punching plate (4) formed cutting lines (5a, 51a, 52a, 5b, 51 b) is perforated, characterized in that the peripheral speed (UGa, UGb) of the cutting lines (5a, 51a, 52a, 5b, 51b) in the effective region (9) with the impression cylinder (3) to the transport speed (6a) of the film tube (6) adapted and outside the effective range (9) is changed in contrast.

8. The method according to claim 7, wherein the rotational speed (DG) of the magnetic cylinder (2) periodically between a first rotational speed (DG1) for contact of the cutting lines (5a, 51a, 52a, 5b, 51b) with the film tube (6) and at least a second non-contact rotational speed (DG2) is changed.

9. The method according to claim 7 or 8, wherein combined transverse / longitudinal perforations (10a, 101a, 102a) selectively in the magnetic cylinder (2) facing wall (6b) of the film tube (6) and / or in two superimposed walls ( 6b, 6c) of the film tube (6) are produced, in particular for the formation of tear tabs and / or tear lines.

10. The method according to any one of claims 7 to 9, wherein functionally over the entire width of the film tube (6) reaching transverse perforations (10b) in two superimposed walls (6b, 6c) of the film tube (6) with the recess laterally delimiting folding edges (6d) getting produced.

1 1. The method of claim 9 and 10, wherein the transverse perforations (10b, 101 b) a lower longitudinal stress in the film tube (6) withstand than the transverse / longitudinal perforations (10a, 101 a, 102 a).

12. The method of claim 9 and 10, wherein the transverse perforations (10b, 101 b) and the transverse / longitudinal perforations (10a, 101 a, 102 a) with the same punching plate (4, 41) are produced.

13. The method according to any one of claims 9 to 12, wherein the peripheral speed (UGa, UGb) outside the effective range (8) for adjusting the position of the transverse perforations (10b, 101b) and / or transverse / longitudinal perforations (10a, 101a, 102a) in the longitudinal direction of the film tube (6) is purposefully reduced or increased.

14. The method according to any one of claims 7 to 13, wherein the film tube (6) is a shrink tube or an elastic tube for labeling containers in a bottling plant.

15. The method according to any one of claims 7 to 14, wherein the punching plate (4, 41) for producing differently perforated label sleeves and / or perforation of different film tubes (6) is replaced.