Device for pressing and severing a material web for a reversing winder

Abstract

The invention relates to a device for pressing and severing a material web, comprising: a pivot arm (9), wherein the pivot arm (9) can be pivoted about a first pivot axis (10); a severing device (11) which is held on the pivot arm (9), wherein the severing device (11) can be pivoted about a second pivot axis (12) provided on the pivot arm (9); at least one blade (13) which is held on the severing device (11) and is held movably on the severing device (11); and a pressure roller (14) which is held on the pivot arm (9).

Description

[0001] Device for pressing and separating a material web for a turret winder

[0002] The present invention relates to a device for pressing and separating a material web. Furthermore, the invention relates to a turret winder with such a device, as well as to a printing system whose unwinding and rewinding sections each have a specific turret winder, and to a method for operating such a printing system.

[0003] Printing systems are designed to ensure the most uninterrupted printing possible. To this end, printing systems have turret winders for feeding material webs to a printing device of the printing system. Such turret winders for feeding material webs to the printing device are also referred to as unwinders, since the material webs wound onto winding shafts are unwound during their feed to the printing system. Likewise, such printing systems have turret winders for receiving finished printed material webs from the printing system. These winders are referred to as take-up winders, since the material web leaving the printing device is wound onto appropriately provided winding shafts in the area of ​​this turret winder.

[0004] A respective turret winder is usually set up for automated roll or winding shaft changes, so that a material web connected to the printing device can be automatically separated and the printing device can be automatically connected to the material web of a further winding shaft for unwinding or, in the case of rewinding, winding can be continued on a further winding shaft. The material web is separated for the rewinding and unwinding using so-called separating devices. Currently known solutions provide for a different design for a separating device assigned to the rewinding compared to a separating device assigned to the unwinding. This means that if the turret winder is used as an unwinding device, a separating device specially designed for the unwinding is installed.Likewise, if the turret winder is used as a winder, a separating device specially designed for the winder is installed.

[0005] The familiar upper and lower separating devices of the unwinding and rewinding sections are typically only movable linearly along a linear guide. The feed is performed along the linear guide depending on the roll diameter, so that different positions along the linear guide may be assumed for successive separating operations.

[0006] Common to the currently known solutions for both unwinding and rewinding is the provision of an upper separating device and a lower separating device, which are used to separate the material web depending on the respective direction of rotation of the unwinding. This means that a known printing system has an upper and a lower separating device for unwinding and also an upper and a lower separating device for rewinding, whereby the respective separating devices for rewinding and unwinding also differ from each other in terms of their overall design.

[0007] Against this background, the present invention is based on the technical problem of providing a device for pressing and separating a material web for a turret winder, which is particularly suitable for both winding and unwinding and, moreover, represents a more efficient design solution. Furthermore, a turret winder with such a device, a printing system, and a method for operating a printing system are to be provided.

[0008] The technical problem described above is solved by the features of the independent claims. Further embodiments of the invention emerge from the dependent claims and the following description.

[0009] According to a first aspect, the invention relates to a device for pressing and separating a material web, comprising a pivoting arm, wherein the pivoting arm is pivotable about a first pivot axis, with a separating device held on the pivoting arm, wherein the separating device is pivotable about a second pivot axis provided on the pivoting arm, with at least one cutting edge held on the separating device, which is movably held on the separating device, and with a pressure roller held on the pivoting arm.

[0010] The device according to the invention for pressing and separating a material web has a greater number of degrees of freedom of movement compared to previously known solutions. The device according to the invention is particularly suitable for positioning above or below a material web, viewed vertically, so that only a single device according to the invention for pressing and separating needs to be assigned to a turret winder, which is suitable for every roll change, regardless of the direction of rotation of the material roll in question.

[0011] While the prior art required two separate devices, namely one device for pressing and separating from above and one device for pressing and separating from below, the device according to the invention replaces these two devices, since the device according to the invention is suitable for pressing and separating from above as well as for pressing and separating from below.

[0012] Furthermore, due to the additional degrees of freedom of movement compared to the prior art, the device according to the invention allows the device for pressing and separating a material web to be designed identically for both unwinding and rewinding. The device according to the invention is therefore particularly suitable for both a turret winder intended for unwinding and a turret winder intended for rewinding.

[0013] The pivot arm can be pivoted by more than 30° about the first pivot axis. In particular, the pivot arm can be pivoted by more than 45° about the first pivot axis. Further in particular, the pivot arm can be pivoted by more than 60° about the first pivot axis. The required pivoting range can be defined, for example, on the basis of the positions to be assumed by the pivot arm, i.e. in particular, it can depend on how far the pivot arm has to be pivoted to enable a material web to be separated and pressed from both above and below. The separating device can be pivoted by more than 90° about the second pivot axis. In particular, the separating device can be pivoted by more than 120° about the second pivot axis. In particular, the separating device can be pivoted by more than 150° about the second pivot axis.

[0014] The cutting edge can be mounted on the cutting device so that it can rotate about a rotational axis. The cutting edge can, in particular, be rotatable by more than 90° about the rotational axis. The cutting edge can, in particular, be rotatable by more than 120° about the rotational axis. The cutting edge can, in particular, be rotatable by more than 150° about the rotational axis.

[0015] The cutting edge can be held on the cutting device in a translationally movable manner.

[0016] The degrees of freedom described above, ie the pivoting or rotational ranges of the pivoting arm, the separating device and the cutting edge, each serve in particular to position the cutting edge and the pressure roller relative to a material web to be separated and relative to another material web or a winding shaft in order to enable a roll change in a turret winder.

[0017] A lifting cylinder can be assigned to the pivot arm to execute the pivoting movement of the pivot arm about the first pivot axis. For example, a lifting piston of the lifting cylinder can be attached to an end section of the pivot arm facing away from the first pivot axis in order to convert a lifting movement of the lifting piston into a pivoting movement of the pivot arm about the first pivot axis – comparable to a crank drive.

[0018] The separating device can be assigned a further cylinder for executing the pivoting movement of the separating device about the second pivot axis, wherein the further cylinder is in particular attached to the pivot arm and is in particular a lifting cylinder. For example, a lifting piston of the further lifting cylinder can be attached to an end section of the separating device facing away from the second pivot axis in order to convert a lifting movement of the lifting piston of the further lifting cylinder into a pivoting movement of the separating device about the second pivot axis—again comparable to a crank drive.

[0019] The pressure roller can be movably mounted on the pivot arm. A further lifting cylinder for performing a pressing movement can be assigned to the pressure roller, wherein the further lifting cylinder assigned to the pressure roller is in particular attached to the pivot arm. The pressure roller is configured to press a material web to be separated either against another material web of another material roll or against another winding shaft—depending on whether a turret winder assigned to the device is a take-up or unwinder.

[0020] Instead of the lifting cylinders mentioned above, other actuators or actuators, such as rotary actuators, part-turn actuators, or swivel cylinders, can be used. The actuators or actuators can be pneumatic, electric, electromagnetic, or hydraulic.

[0021] According to a further aspect, the invention relates to a turret winder with two spaced-apart swivel wheels for receiving and swiveling winding shafts and with a device according to the invention, as described above, for pressing and separating material webs.

[0022] The separating device of the device according to the invention can be arranged in a first pivoting position on a first side of a material web of a winding shaft, said first side facing the first pivoting axis, which is passed through the device in order to enable the material web to be pressed and separated starting from the first side of the material web.

[0023] The separating device can be arranged in a second pivoting position on a second side of the material web facing away from the first pivoting axis and the first side of the material web in order to enable the material web to be pressed and separated starting from the second side of the material web.

[0024] A corresponding turret winder equipped with the device according to the invention for pressing and separating material webs can be used both as a take-up and as an unwinder for a printing system, whereby only a single device according to the invention for pressing and separating material webs is required, since this device is suitable, viewed in the vertical direction, for pressing and separating the material web from above as well as from below - i.e. it can be positioned either above or below a respective material web. When reference is made to a winding shaft in this text, this can refer to a one-piece or multi-piece winding shaft. A one-piece winding shaft essentially consists of a self-supporting core with end pins, which can be held on the turret winder. The material web is wound onto the self-supporting core.A multi-part winding shaft has a central shaft element that can be held at the end of the turret winder, wherein the shaft element carries a sleeve for receiving the material web.

[0025] According to a further aspect, the invention relates to a system having a machine for producing windable products, such as a printing press for producing a printed product, an extrusion line for producing a film product, a tubular machine for producing a tubular product or the like, having a first turret winder, wherein the first turret winder is designed in the above-described inventive manner and is a wind-up, and having a second turret winder, wherein the second turret winder is designed in the above-described inventive manner and is a wind-up.

[0026] According to a further aspect, the invention relates to a method for operating a system according to the invention, comprising the method steps: unwinding and feeding material webs to the machine for producing windable products by means of the first turret winder, wherein, for uninterrupted operation, material webs are alternately connected to one another by means of the pressing and separating device; and winding and removing the material web from the machine for producing windable products by means of the second turret winder, wherein, for uninterrupted operation, the material web is alternately connected to winding shafts by means of the pressing and separating device.

[0027] It can be provided that the swivel arm of the unwinder is pivoted into a position before separation, for which the pressure roller is positioned at the height of a rotation axis of the swivel wheels. In particular, it can be provided that a material roll is pre-positioned at a distance from the pressure roller by means of the turret winder before the separation process. Furthermore, it can be provided that, upon initiation of the separation process, a lifting or pitching movement is performed by means of a lifting cylinder assigned to the pressure roller in order to bridge the distance between the pressure roller and the material roll and to carry out the pressing.

[0028] In principle, it would also be conceivable to move the pressure roller against the material web solely by pivoting the swivel wheel. However, this would require large masses to be accelerated very quickly to ensure the precise timing of the cutting process during roll changes. The pressure roller's lifting cylinder therefore enables rapid pressing and precise synchronization of the pressing with the cutting process.

[0029] The invention is described in more detail below with reference to a drawing illustrating exemplary embodiments. The drawings schematically show:

[0030] Fig. 1 shows a turret winder according to the invention as a unwinder with a device according to the invention for pressing and separating a material web in a position for separating from above;

[0031] Fig. 2 shows a pre-positioning of the turret winder and the device from Fig. 1 before a separating process;

[0032] Fig. 3 shows a pre-positioning of a separating device of the device from Fig. 1 before a separating process;

[0033] Fig. 4 a separation and pressing by means of the device and the

[0034] Turret winder according to Fig. 1;

[0035] Fig. 5 shows a turret winder according to the invention as a unwinder with a device according to the invention for pressing and separating a material web in a position for separating from below;

[0036] Fig. 6 shows a pre-positioning of the turret winder and the device from Fig. 5 before a separating process;

[0037] Fig. 7 shows a separation and pressing operation using the device and the turret winder according to Fig. 5; Fig. 8 shows a turret winder according to the invention as a winding device with a device according to the invention for pressing and separating a material web in a position for separation from above;

[0038] Fig. 9 shows the state of the winding according to Fig. 8 before a required roll change;

[0039] Fig. 10 shows a pre-positioning of the turret winder and the device from Fig. 8 before a separating process;

[0040] Fig. 11 shows a pre-positioning of the turret winder and the device from Fig. 8 before a separating process;

[0041] Fig. 12 shows a pre-positioning of a separating device of the device from Fig. 8 before a separating process;

[0042] Fig. 13 a separation and pressing by means of the device and the turret winder according to Fig. 8;

[0043] Fig. 14 shows the state of the winding according to Fig. 8 after the roll change;

[0044] Fig. 15 shows a turret winder according to the invention as a winder with a device according to the invention for pressing and separating a material web in a position for separating from below;

[0045] Fig. 16 shows the state of the winding according to Fig. 15 before a required roll change;

[0046] Fig. 17 shows a pre-positioning of the turret winder and the device from Fig. 15 before a separating process;

[0047] Fig. 18 shows a pre-positioning of a separating device of the device from Fig. 15 before a separating process;

[0048] Fig. 19 a separation and pressing by means of the device and the turret winder according to Fig. 15;

[0049] Fig. 20 shows the state of the winding according to Fig. 8 after the roll change; Fig. 21 shows a printing system according to the invention;

[0050] Fig. 22 Process steps of a process according to the invention.

[0051] Fig. 1 shows a turret winder 1 according to the invention. The turret winder 1 has two spaced-apart swivel wheels 2, wherein only one swivel wheel 2 is shown in the exemplary and schematic representation shown in Fig. 1. A first material roll 3 is arranged between the swivel wheels 2 and rotatably held on the swivel wheels 2, wherein the material roll 3 has a winding shaft 4 and a material web 5 wound on the winding shaft 4.

[0052] The turret winder 1 is an unwinder in this case. Accordingly, the material web 5 is unwound from the winding shaft 4 and fed to a printing system (not shown here).

[0053] As far as a diameter d1 of the first material roll 3 has been reduced to a dimension d2 by the unwinding of the material web 5, which allows a mounting of a second material roll 6 on the turret winder 1, a second material roll 6 is provided, which is now also rotatably held between the swivel wheels 2.

[0054] The turret winder 1 has a device 7 according to the invention for pressing and separating a material web.

[0055] The device 7 serves to enable a seamless change from the material web 5 of the first material roll 3 to the material web 8 of the second material roll 6 during printing. For this purpose, the material web 5 is separated and pressed and glued to the material web 8 of the material roll 6. This method is described in detail below with reference to Figures 2, 3, and 4. The structural design of the device 7 is also described.

[0056] In the following exemplary embodiments, only those guide rollers or deflection rollers are shown that are required to guide the material web in the respective example. Therefore, not all existing guide rollers or deflection rollers are shown in every illustration. This means that although the winding and unwinding devices 7 are partially illustrated with different guide rollers or deflection rollers depending on the respective web guidance of the material web, the winding and unwinding devices 7 are nevertheless essentially structurally identical.

[0057] The device 7 has a pivot arm 9, which can pivot about a first pivot axis 10. The first pivot axis 10 is stationary. The pivoting is achieved by means of a lifting cylinder 15.

[0058] The device 7 has a separating device 11 mounted on the pivot arm 9, wherein the separating device 11 is pivotable about a second pivot axis 12 provided on the pivot arm 9. The pivoting is effected by means of a lifting cylinder 22.

[0059] A cutting edge 13 is provided on the separating device 11, wherein the cutting edge 13 is movably held on the separating device 11 - namely rotatable about a rotation axis 21.

[0060] Furthermore, the device 7 has a pressure roller 14 held on the pivot arm 9.

[0061] Fig. 2 shows a pre-positioning of the swivel arm 9, the material rolls 3, 6 and the pressure roller 14, which takes place before the separation and pressing.

[0062] The swivel arm 9 has been swiveled by more than 30° about the first swivel axis 10 by means of the lifting cylinder 15 from the position shown in Fig. 1 to the position shown in Fig. 2.

[0063] The pressure roller 14 has been disengaged and pre-positioned by means of a lifting cylinder 18.

[0064] The pressure roller 14 and a rotational axis 16 of the swivel wheel 2 are located at the same height as shown in Fig. 2, i.e., prior to pressing and separating. In particular, it can be provided that a rotational axis 17 of the pressure roller 14 and the rotational axis 16 of the swivel wheel 2 are arranged within a common horizontal plane, i.e., are located at exactly the same height.

[0065] After pivoting the pivot arm 9 into the position shown in Fig. 2, the second material roll 6 is positioned near the pressure roller 14 using the pivot wheel 2 in such a way that a small gap is formed between the pressure roller 14 and the second material roll 6 (see Fig. 2), so that the material web 5 of the first material roll 3 and the material web 8 of the second material roll 6 do not yet touch each other. Pre-positioning takes place during operation, i.e., while the material web 5 continues to be unwound from the first material roll 3 and fed into the printing system.

[0066] As shown in Fig. 3, the separating device 11 is now positioned near the first material web 5 to be separated by pivoting the separating device 11 about the second pivot axis 12 in the direction of the material web 5 by means of the lifting cylinder 22. The pressure roller 14 and the separating device 11 are held and mounted independently of one another on the device 7.

[0067] Fig. 4 illustrates the essentially simultaneous separation of the first material web 5 and the pressing of the first material web 5 against the second material web 8, in which the cutting edge 13 of the separating device 11 separates the material web 5 from the first material roll 3 and, in addition, a lifting movement of the pressure roller 14 is carried out in the direction of the second material roll 6 in order to connect the first material web 5 to the second material web 8 and thus ensure an uninterrupted supply of the material webs to the associated printing system. The lifting movement or pitching movement of the pressure roller 14 is carried out by means of the lifting cylinder 28.

[0068] The first material roll 3 is now decoupled from the printing system, so that the material web 8 of the second material roll 6 is now unwound and fed to the printing system - as shown in Fig. 4.

[0069] After the separation and pressing, the pressure roller 14 is lifted from the material web 8 of the second material roll 6, the separation device 11 is pivoted back and the pivot arm 9 is also pivoted back into the starting position shown in Fig. 1.

[0070] Once the material web 8 has been used up, a third material roll is inserted into the turret winder 1 instead of the first material roll 3, and the changeover process outlined above is carried out again. In this way, an uninterrupted supply of material webs to the printing system can be achieved by means of the turret winder 1. With reference to Figures 1-4, the cutting and pressing of the material web has been described from above, wherein the cutting device 11 is initially positioned in a first pivot position on a first side S1 of the material web 5 of the winding shaft 4, said first side S1 facing the first pivot axis 10 and guided through the device 7, in order to enable the material web 5 to be pressed and cut starting from the first side S1 of the material web 5.

[0071] With reference to Figures 5, 6 and 7, a separation and pressing from below is described below, wherein the separation device 11 is initially positioned in a second pivot position on a second side S2 of the material web 5 facing away from the first pivot axis 10, in order to enable a pressing and separation of the material web 5 starting from the second side S2 of the material web 5 - or to enable this with the opposite direction of rotation of the material roll 3'. The definition of the first and second sides S1, S2 relates solely to whether the material web is arranged between the separation device 11 and the first pivot axis 10 or not. That isThe case in which the separating device 11 and the first pivot axis 10 are located on the same side of the material web 5 is referred to as separating from above, while the case in which the separating device 11 and the pivot axis 10 are located on different sides of the material web 5 is referred to as separating from below.

[0072] As can be seen from Fig. 6, when separating from below, the pivot arm 9 pivots around the pivot axis 10 into the same position as was the case for separating from above according to Fig. 2. In contrast to the previously discussed variant, the pressure roller 14 and the separating device 11 are approached from below and pre-positioned to the material web 5 according to Fig. 6. Again, the pressure roller 14 is located a short distance from the second material roll 6 in order to synchronize the pressing with the separating process.

[0073] Fig. 7 shows the severing of the material web 5 of the first material roll 3 and the pressing of the material web 5 against the material web 8 of the second material roll 6 in order to ensure uninterrupted printing. For this purpose, the pressure roller 14 presses the severed material web 5, i.e. its running-out remnant, against the material web 8 of the second material roll 6 in order to connect the material web 8 to the printing system and feed it into the printing system. In addition to the pressing, the material webs 5, 8 can also be glued together at the same time. The material webs 5, 8 are therefore glued to one another in particular. After pressing and separating, the device 7 is pivoted back into its starting position according to Fig. 5.

[0074] Fig. 8 shows an exemplary and schematic illustration of another turret winder T, which in this case is a winder of a printing system. This means that a material web 18 printed by the printing system is wound up by the turret winder T. The turret winder T enables uninterrupted winding, so that printing does not have to be stopped during a roll change.

[0075] The winding is described as an example for a first material roll 3' to be wound up and a second material roll 6' to be wound up.

[0076] A significant difference from the previously described unwinding is that the pressure roller 14 is permanently in contact with the respective material roll 3' to be wound during winding to assist the winding process. Fig. 8 shows the start of winding for the material roll 3'.

[0077] Fig. 9 shows the moment before a required roll change. The material roll 3' has grown to a maximum diameter due to the continuous winding of the material web 18 fed by the printing system, so that a change to another material roll 6' to be wound must now take place. Before the material web 18 is wound for the first time, such a material roll 6' to be wound consists only of the "empty" winding shaft provided on the turret winder T.

[0078] Figs. 10 and 11 show the step-by-step pre-positioning of the device 7 and the swivel wheel 2 for the roll change. First, Fig. 10 shows that the pressure roller 14 is lifted from the material roll 3' for the first time, as the swivel wheel 2 pivots the material roll 3' in a direction away from the device 7.

[0079] Fig. 11 shows the positioning of the pivot arm 9. Once again, the pivot arm 9 has been pivoted about the pivot axis 10 by means of the lifting cylinder 15 such that the pressure roller 14 is at the level of the rotational axis 16 of the pivot wheel 2. Accordingly, the position of the pivot arm 9 for pressing and separating is always the same, regardless of whether it is a winding or unwinding operation, or whether the separating and pressing occurs from above or below. The device 7 is therefore universally applicable, i.e., for both winding and unwinding, and suitable for separating and pressing from both directions, i.e., from above and below.

[0080] According to Fig. 12, the separating device 11 has been folded out in the direction of the material web 18 to be separated.

[0081] According to Fig. 13, the separation has been completed, and the material web 18 has been pressed against the material roll 6' and transferred for further winding. All processes take place during ongoing operation of the printing system, i.e., during the continued continuous feed of the material web 18 to the turret winder T.

[0082] The full material roll 3' can now be removed from the turret winder T and replaced with an empty winding shaft. As soon as the material roll 6' has been wound up to its maximum diameter, analogous to Fig. 9, the change to the empty winding shaft can take place again.

[0083] In Fig. 14 it can again be seen that the separating device 11 has been folded in after the separation and the pressure roller 14 rests against the material roll 6' to support the winding.

[0084] Figures 8 - 14 have shown the case of a winding with pressing and separating from above, ie the case in which the separating device 11 and the pivot axis 10 are arranged on the same side of the material web 18, and the material web 18 is thus not arranged between the pivot axis 10 and the separating device 11.

[0085] With reference to the further figures 15 - 20, the pressing and separating from below for the winding T is shown below, ie the case in which the separating device 11 and the pivot axis 10 are not arranged on the same side of the material web 18, and the material web 18 is thus arranged between the pivot axis 10 and the separating device.

[0086] Figures 15 and 16 show the winding of the material web 18 onto the material roll 3', where the maximum diameter in Fig. 16 has been reached and a roll change must occur. The winding takes place in contact with the pressure roller 14, which supports the winding of the material web 18 onto the material roll 3'. Figures 17 and 18 show the pre-positioning of the separating device 11 and the material roll 6', which is initially an empty winding shaft.

[0087] Fig. 19 shows the separation and pressing of the material web 18, so that it is now wound onto the material roll 6'.

[0088] Fig. 20 shows the winding of the material web 18 onto the material roll 6' in contact with the pressure roller 14. The full material roll 3' can be removed from the turret winder T and replaced with an empty winding shaft. As soon as the material roll 6' has reached a maximum diameter analogous to the material roll 3' shown in Fig. 16, another roll change can be initiated.

[0089] Fig. 21 shows an example and schematically a printing system 19, with a printing device 20 for printing a material web 5, 8, 18, with a first turret winder 1, wherein the first turret winder 1 is designed according to the invention and is a unwinder 1 and with a second turret winder T, wherein the second turret winder is designed according to the invention and is a take-up 1'.

[0090] A method according to the invention can be specified with the method steps: (A) unwinding and feeding material webs 5, 8 to the printing device 20 by means of the first turret winder 1, wherein for uninterrupted printing, material webs 5, 8 are alternately connected to one another by means of the device 7 for pressing and separating the first turret winder 1; (B) printing the material webs by means of the printing device 20; and (C) winding and removing the material web 18 from the printing device 20 by means of the second turret winder T, wherein the material web 18 is alternately connected to the winding shafts for uninterrupted printing by means of the device 7 for pressing and separating the second turret winder T.

[0091] Process steps (A), (B) and (C) run in parallel. Reference symbols

[0092] 1 device

[0093] 2 swivel wheels

[0094] 3 material rolls

[0095] 4 winding shaft

[0096] 5 Material web

[0097] 6 material rolls

[0098] 7 Device

[0099] 8 Material web

[0100] 9 Swivel arm

[0101] 10 first swivel axis

[0102] 11 Separating device

[0103] 12 second swivel axis

[0104] 13 cutting edges

[0105] 14 Pressure roller

[0106] 15 lifting cylinders

[0107] 16 Rotation axis

[0108] 17 Rotation axis

[0109] 18 lifting cylinders

[0110] 19 printing system

[0111] 20 printing device

[0112] 21 Rotation axis

[0113] 28 lifting cylinders

Claims

Patent claims 1. Device for pressing and separating a material web, with a pivoting arm (9), wherein the pivoting arm (9) is pivotable about a first pivot axis (10), with a separating device (11) held on the pivoting arm (9), wherein the separating device (11) is pivotable about a second pivot axis (12) provided on the pivoting arm (9), with at least one cutting edge (13) held on the separating device (11), which is movably held on the separating device (11), and with a pressure roller (14) held on the pivoting arm (9).

2. Device according to claim 1, characterized in that the pivot arm (9) is pivotable by more than 30° about the first pivot axis (10), in particular is pivotable by more than 45° about the first pivot axis (10), in particular is pivotable by more than 60° about the first pivot axis (10) and / or the pivot axis (10) is stationary.

3. Device according to one of the preceding claims, characterized in that the separating device (11) is pivotable by more than 90° about the second pivot axis (12), in particular is pivotable by more than 120° about the second pivot axis (12), in particular is pivotable by more than 150° about the second pivot axis (12).

4. Device according to one of the preceding claims, characterized in that the cutting edge (13) is held on the separating device so as to be rotatable about an axis of rotation (21), wherein the cutting edge (13) is in particular rotatable by more than 90° about the axis of rotation (21), in particular rotatable by more than 120° about the axis of rotation (21), in particular rotatable by more than 150° about the axis of rotation (21).

5. Device according to one of the preceding claims, characterized in that the pivoting arm (9) and / or the separating device (11) is each assigned a lifting cylinder (15, 22) for carrying out a respective pivoting movement.

6. Device according to one of the preceding claims, characterized in that the pressure roller (14) is movably held on the pivot arm (9), wherein the pressure roller (14) is assigned in particular a lifting cylinder (28) for carrying out a pressing movement.

7. Turret winder, with spaced-apart swivel wheels (2) for receiving and swiveling winding shafts (4), with a device (7) according to one of the preceding claims 1 - 6.

8. Turret winder according to claim 7, characterized in that the separating device (11) can be positioned in a first pivot position on a first side (S1) of a material web (5, 8, 18) of a winding shaft (4) which is guided through the device (7), said first side (S1) facing the first pivot axis (10), in order to enable the material web (5, 8, 18) to be pressed against and separated starting from the first side (S1) of the material web, and wherein the separating device (11) can be positioned in a second pivot position on a second side (S2) of the material web (5, 8, 18) facing away from the first pivot axis (10), in order to enable the material web (5, 8, 18) to be pressed against and separated starting from the second side (S1) of the material web.

9. Turret winder according to claim 7 or claim 8, characterized in that the pressure roller can be positioned by means of the pivot arm at the level of the rotation axes of the pivot wheels.

10. System, with a machine (20) for producing windable products (5, 8, 18), such as a printing press for producing a printed product, an extrusion line for producing a film product, a hose machine for producing a hose product or the like, with a first turret winder (1), wherein the first turret winder (1) is designed according to claim 6 and is a unwinder, with a second turret winder (T), wherein the second turret winder (T) is designed according to claim 6 and is a winder.

1. A method for operating a system, the system being designed according to claim 10, comprising the method steps: - unwinding and feeding material webs (5, 8) to the machine (20) for producing windable products (5, 8, 18) by means of the first turret winder (1), wherein, for uninterrupted operation, material webs are alternately joined to one another by means of the device (7) for pressing and separating; and - Winding and removing the material web (18) from the machine (20) for producing windable products (5, 8, 18) by means of the second turret winder (T), the material web (18) being alternately connected to winding shafts (4) by means of the device (7) for pressing and separating for uninterrupted operation.

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