EP1386869B1 - Web spreading device - Google Patents

Abstract

The spreading device includes a mounting (2), a cutting device (4) producing left and right web strings (Bl, Br) of the web (B) and first and second diverting devices for the two strings. The strings pass round these devices so that they can be spread out by a certain measurement from each other. One of the second diverting devices is movable along a setting path relative to the other.

Description

The invention relates to a web spreading device for or in a web-processing machine in which a material web to be processed, for example a plastic film or metal foil or in particular a paper web, is endlessly conveyed and processed. The processing machine may in particular be a rotary printing machine, preferably for the printing of large newspaper editions.

The DE 100 23 169 A1 describes a web spreading device with two arrow-shaped turning bars, which are arranged in the web conveying direction behind a longitudinal cutting device behind the other and are mounted relative to each other movable in a machine frame. By adjusting the two arrow-shaped turning bars relative to each other two web strands of a longitudinally cut web can be offset in parallel and thereby spread apart. The spreading device is compact. The two web strands are offset symmetrically in relation to the longitudinal section in parallel, ie each by the same offset.

It is an object of the invention to increase the flexibility of a web spreading device with regard to the possible web guides.

The invention relates to a web spreading device which is arranged in a web processing machine or provided for the arrangement in a web processing machine. It serves to create a distance between parallel web strands transversely to a web conveying direction or to change an optionally existing distance, preferably to increase it. The web spreading device is inserted in the machine or preferably in the machine before acting on the web Processing unit arranged, in the case of several processing units, for example, before the first processing unit seen in the web conveying direction to adjust the position of the web strands with respect to the processing unit or the plurality of processing units transversely to the web conveying direction. As the web conveying direction, the longitudinal direction of the uncut web and the longitudinal direction of the parallel offset web strands are generally referred to below in the following.

The web spreading device comprises a frame, a cutting device for slitting a web into a left web strand, and at least one further, right web strand, at least two left web strand redirecting devices, and at least two right web strand web redirecting devices. The deflecting each have obliquely to the web conveying direction. In the production, for example a print production, the left-hand deflectors are looped around by the left-hand web strand and the right-hand deflectors are looped around by the right web strand, i. Each of the deflection devices forms a deflection axis for that track, to which it is assigned. Each of the deflection devices can be formed in particular in the manner of a turning bar. It can also form a rotatably mounted deflection roller one of the deflection, which is advantageous for the web guide, but increases the complexity of Bahnspreizvorrichtung.

The at least two left-hand deflection devices are arranged one behind the other in the web conveying direction. They are therefore referred to as up-stream, first left diverter and down-link, second left diverter. Preferably, they are arranged directly behind one another in the strand path of the left-hand web strand, ie there is no further deflection device between them which the left-hand web strand wraps around. For the at least two right-hand deflection devices, which are referred to below as the first right deflection device and the second right deflection device, what has been said about the left-hand deflection devices applies equally to the right-hand web strand. It should also be noted with regard to the arrangement of the deflecting devices that the first left-hand deflecting device and the first right-hand deflecting device point toward one another in a plan view of the web and the deflecting axes formed by them have an angle of less than 180 ° in plan view lock in. The second left-hand deflecting device and the second right-hand deflecting device also point towards one another in plan view, wherein their deflecting axes also include an angle of less than 180 ° in plan view. If the deflecting devices or a part of the deflecting devices are pivotably mounted in the frame in order to pivot the deflecting devices or a part of the deflecting devices for the purpose of adjusting the angle in the web plane or web path level, however, it is also conceivable that the deflecting devices facing each other are aligned in a swiveling position, However, then there is no spread through the respective deflection.

The deflection devices are shaped and arranged relative to one another such that the left-hand web strand is spread parallel to one another by looping around the left-hand deflection devices and the right-hand web strand is looped around by the right-hand deflection devices. A Aufeinanderzuspreizen, ie a parallel offset to each other, is basically conceivable alternative. With appropriate pivoting of the deflection, could also be either spread or spread. The web strands are each offset parallel to their position before the looping of the associated first deflecting device. The distance that the splayed web strands have perpendicular to the web conveying direction from each other is referred to below as Spreizmaß. In order to adjust the Spreizmaß, at least one of the left deflecting relative to the other of the left deflecting means and at least one of the right deflecting relative to the other of the right deflectors in the frame is each movably mounted by an adjustment. These at least two adjustment paths are preferably parallel to one another and furthermore preferably also the same length. The parallelism of the offset can be ensured most simply by the fact that the left-hand deflecting devices have the same cross-sectional shape and size among each other via their lengths acting on the left-hand web strand and the same cross-sectional shape and also the right-hand deflecting devices have the same cross-sectional shape and size over their lengths acting on the right-hand web strand; the deflection axes of the left-hand deflection devices in the adjustment positions and also the deflection axes of the right-hand deflection devices in the adjustment positions are parallel to one another in pairs.

According to the invention, the first deflection means or more preferably the second deflection means are movable relative to each other. In principle, both the first deflection devices relative to one another and the second deflection devices can be movable relative to one another. The mounting of the movable deflection devices is preferably such that the movable deflection devices can each be moved independently of each other of the deflection devices along their displacement path. Due to the adjustability according to the invention, the path lengths traveled by the web strands between the associated deflectors can be varied with each other, i. the path length traveled by the left-hand web strand between the first left and second left-hand deflecting means may optionally be greater or smaller than the path length traveled by the right-hand web strand between the first right and the second right-hand deflecting means. Of course, the deflection can also be adjusted in positions in which the path lengths of the two web strands between the respective associated deflection are equal.

The parallel offset of the two web strands can therefore be chosen differently large. It can also pass the Bahnspreizvorrichtung without parallel offset one of the web strands while the other is offset in parallel. As a particular advantage, the invention opens up the possibility of setting the parallel offset of one of the web strands independently of the other of the web strands.

The web spreading device according to the invention can therefore form the actuator of a web edge control for at least one of the web strands and preferably for both web strands.

As far as the adjustability is concerned, for example each of the deflection devices can be mounted individually movable in the frame. It is conceivable, for example, that the first left-hand deflecting device and the second right-hand deflecting device are movably mounted and the other two deflecting devices are firmly clamped in the frame. A possible adjustability for the purpose of compensating for manufacturing tolerances is once again disregarded as far as the term of the fixed clamping is concerned. By adjustability, the invention rather means that the respective deflection device is still movable while maintaining such an adjustment if necessary. The mobility is also preferably such that the respective deflection device can be moved after the entry of a new track in the desired adjustment position. Particularly preferably, it can also be moved in the current production along its displacement. Accordingly, in a particularly preferred embodiment, the spreading device comprises a control device which has a drive device for driving the movable deflection devices and can advantageously be further developed into a control and regulating device. Basically, however, the invention also relates to a web spreading device in which the movable deflection devices are manually moved to the desired adjustment positions and fixed in these adjustment positions.

The flexibility can be further increased if the deflecting devices and the longitudinal cutting device are movable in a linear manner transversely to the web conveying direction. Preferably, the deflecting means and the longitudinal cutting means are mounted together in the frame, and the frame as a whole is movable straight relative to the processing unit or the plurality of processing units transversely to the web conveying direction.

It should be noted, finally, that in a current production not necessarily in the spreading longitudinally cut web must be processed, but it may also be that the web already enters strand width, for example, because it is already wound only in strand width on a roll.

Further preferred embodiments of the invention are also described in the subclaims.

Figur 1

eine Bahnspreizvorrichtung in einer Rollenrotationsdruckmaschine,

Figur 2

die Bahnspreizvorrichtung in einem Zustand, in dem zwei Stränge einer Bahn symmetrisch voneinander abgespreizt und mittig auf je einen Falztrichter geführt werden,

Figur 3

die Bahnspreizvorrichtung in einem Zustand, in dem die Stränge einer Bahn asymmetrisch voneinander abgespreizt und mittig je auf einen Falztrichter zugeführt werden und

Figur 4

die Spreizvorrichtung in einem Zustand, in dem die Stränge einer Bahn asymmetrisch voneinander abgespreizt und einer der Bahnstränge mittig und der andere der Bahnstränge außer mittig je auf einen Falztrichter geführt werden.

The invention will be explained below using an exemplary embodiment. The features disclosed in the exemplary embodiment form the subject of the claims individually and in each combination of features. Show it:

FIG. 1

a web spreading device in a web-fed rotary printing press,

FIG. 2

the web spreading device in a state in which two strands of a web are spread apart symmetrically from each other and guided centrally on a respective former,

FIG. 3

the web spreading device in a state in which the strands of a web are asymmetrically spread apart from each other and each fed centrally to a former, and

FIG. 4

the spreading device in a state in which the strands of a web are asymmetrically spread apart from each other and one of the web strands centered and the other of the web strands out of the center each guided on a former.

FIG. 1 shows components of a web-fed rotary printing press comprising a web spreading device according to the invention. Shown is the path of a web to be printed B of a reel changer 1 via a web spreading device to a printing unit 9, which is formed as a printing tower. The spreading device includes a longitudinal cutting device 4, which serves to cut the web B longitudinally into two web strands Bl and Br, and deflection devices 5 and 6, which serve to spread the formed web strands Bl and Br parallel to each other. The splayed web strands Bl and Br are conveyed in the web conveying direction F to a printing tower 9 and printed on both sides depending on multi-color. From the printing tower 9, two cylinder bridges, each formed from two printing on the web strands Bl and Br blanket cylinders and each associated with a plate cylinder, are shown. Of course, the printing tower 9 can also comprise further such cylinder bridges in order to print the web strands B1 and Br four-color on both sides, for example. Behind the printing tower 9, the web strands B1 and Br are either separately or ever with at least one other web strand on a former 20 or together on a common former 20 and separated in the formers or folded along in the former together. In the web conveying direction F, a folding apparatus or a plurality of folders for cross-cutting and transverse folding can be arranged behind the former 20 or the plurality of folders.

The uncut web B entering the spreading device from the roll changer 1 is conveyed via an inlet guide 3 to the longitudinal cutting device 4. The longitudinal cutting device 4 is essentially formed by two cutting rollers which can be placed on and off one another and between which the web B is conveyed. By the longitudinal section of the left Bahnstrang Bl and the right rail track Br are formed. The web strands Bl and Br are guided via a first deflection device 5, an immediately following second deflection device 6 and a discharge guide device 7. Subsequently, they are conveyed to the printing tower 9 via further guide devices, of which one next to the outlet guide 7 next adjacent guide 8 is shown. The longitudinal cutting device 4 and the first deflection device 5 are mounted in a fixed positional relationship to each other in a frame 2. The inlet guide 3 is a guide roller which is rotatably mounted in the frame 2. The first deflection device 5 is not rotatable.

The second deflection device 6 is movably supported linearly guided together with the outlet guide 7 in the frame 2. A linear guide track 11 of the bearing is fixedly connected to the frame 2. The second deflection device 6 and the outlet guide device 7 are continuously movable back and forth along the linear guide 11 between two extreme positions. One of the two extreme positions is in FIG. 1 in solid line and the other shown in dashed line. A control device 15 controls a drive device 12 based on instructions that can be input to the control device 15 or to a higher-level machine control such that the second deflection device 6 and the outlet guide device 7 assume the desired adjustment position on the adjustment path.

FIG. 2 shows the web spreading device in a first state in a plan view of the web plane. It can be seen, in particular, that the second deflection device 6 and the outlet guide device 7 are each divided in the middle into two symmetrical halves. The two halves are independently linearly guided on a frame-fixed linear guide 11 (FIG. FIG. 1 ) movably mounted. The adjustment paths and also the extreme positions of the two halves are the same. The movements of the two Halves are controlled by the controller 15 via the drive means 12 and optionally also regulated. Thus, the two halves can be moved in particular together or individually or in opposite directions along their adjustment paths and fixed in any position between the extreme positions.

By the central division, a second left diverter 6l and a second right diverter 6r and a left outlet guide 7l and a right outlet guide 7r are formed. The second left diverter 6l and the left exit diverter 7l are associated with the left web strand Bl, i. they only come in contact with the left-hand track Bl. The second right hand deflector 6r and right hand runner 7r are associated with the right hand web strand Br, i. they only come in contact with the right-hand track Br. Accordingly, there is also an assignment in the first deflection device 5. The first deflection device 5 is, however, fixed in the frame at the two opposite frame sides 2l and 2r. The first deflection device 5 functionally breaks down into a first left-hand deflection device 5l and a first right-hand deflection device 5r. The deflection devices 5l, 5r, 6l and 6r each have the same cross section. In the exemplary embodiment, they are each formed as circular rods.

The first deflection devices 5l and 5r and in particular the deflection axes formed by them form in the plan view of the plane of the incoming web B an arrow shape, the tip of which faces the web conveying direction F. The first deflection devices 5l and 5r are firmly connected to one another in the middle in the area of the "arrowhead". The tip itself is worked around to avoid the risk of scoring the web B. The longitudinal cutting device 4 and the tip formed by the first deflecting means 5l and 5r lie exactly on the machine axis S. The arrangement of the parts of the spreading device associated with the left web strand Bl is symmetrical with the arrangement of the parts associated with the right web strand Br are. In that regard, the machine axis S also simultaneously forms an axis of symmetry of the spreading device.

The right-hand deflection devices 5r and 6r form mutually parallel deflection axes for the right-hand web strand Br. The adjustment paths of the second deflection devices 6l and 6r run in such a way that the parallelism of the deflection axes in each Adjustment of the second deflection 6l and 6r is maintained.

The outlet guide means 7l and 7r are arranged relative to the second deflecting means 6l and 6r so that the web strand level defined by the second left deflecting means 6l and the left outlet guide 7l in the case of wrapping and that of the second right deflecting means 6r and Right outlet outlet guide 7r in the case of wrapping defined Bahnstrangebene is parallel to the orbital plane, which is predetermined by the inlet guide 3 and the two first deflection 5l and 5r in the case of their wrap. The outlet guide devices 7l and 7r form deflection axes pointing perpendicular to the web conveying direction F. The second left-hand deflecting device 6l and the left-hand outlet guide 7l are mounted together on a left-hand carriage 10l. The bearing on the carriage 10l is such that the deflection axes of the second left deflection 6l and the left outlet guide 7l are adjustable relative to the carriage 10l at most in the context of tolerance-compensating adjustments. The same applies mutatis mutandis to the storage of the second right deflection 6r and the right outlet guide 7r on the right slide 10r. The two carriages 10l and 10r are each movable along their own frame guide 11 on their respective frame side 2l and 2r, the left linear guide 11 being parallel to the right linear guide 11 and being arranged at the same height with respect to the web conveying direction F. The two outlet guide means 7l and 7r may be rotatably mounted on the respective slide 10l and 10r. Basically, the same applies to the second deflection 6l and 6r, but the simpler construction is preferred because of the formation each as a non-rotatable rod.

In the in FIG. 2 shown state of the spreading take the second left deflecting 6l and the second right deflecting 6r each an adjustment position in which they a single to the incoming web B plane parallel plane for the Web strands Bl and Br define. In such positions, the second deflecting means 6l and 6r also form an arrow shape with each other, but with a narrow gap between their free ends, which exactly overlap one another in these positions. The deflection axes formed by the second deflection devices 6l and 6r intersect accordingly. The deflection axes formed by the outlet guide devices 7l and 7r are aligned in these adjustment positions.

The web B enters symmetrically to the machine axis S in the spreading device. Because of this track symmetry and the positioning of the second deflection devices 6l and 6r in a common plane, the two web strands Bl and Br are each spread apart to one side away from the machine axis S by the same offset parallel to each other. This results in the Spreizmaß X, which designates the transversely to the web conveying direction F measured clear distance between the web strands Bl and Br. "M" is the distance measured in the web plane between a left boundary line and a right boundary line, up to which the web strands Bl and Br can be displaced parallel to the left outside or right outside with sufficient web width by means of the spreading device. In the illustrated state of the spreading device with symmetrical inlet of the web B remains between the left outer edge of the left web strand Bl and the left boundary line a distance X / 2. A similar distance remains between the right boundary line and the right web edge of the right web strand Br. Due to the web width Z, the symmetrical inlet, the symmetrical section and the symmetrical spread to the Spreizmaß X, the left web strand Bl centered in its associated Längsfalztrichter 20th , and the right web strand Br also runs centrally into its associated longitudinal folding hopper 21. The web strands Bl and Br are also printed symmetrically to their longitudinal fold Ll and Lr. The widths of the web strands Bl and Br are indicated by A, and the widths on both sides of the longitudinal folds Ll and Lr are indicated by A '. The following applies: Z = 2A = 4A '. It should be noted that the former 20 and the former 21 can be formed by a single former.

In the embodiment of FIG. 3 the web B runs asymmetrically to the machine axis S in the spreading device. The symmetry longitudinal axis of the web B is denoted by S _B. It is laterally offset to the machine axis S. The web B is cut asymmetrically into a left web strand Bl and a right web strand Br by means of the cutting device 4 in accordance with the offset of the axes S and S _B.

In the second embodiment, the spreading device is in a state in which the right slide 10r with the second right turning device 6r and the right run guide 7r does not protrude into the path of the right web strand Br, and accordingly, no wrap-around contact with the right web strand Br Has. The right web strand Br is therefore conveyed through without lateral displacement by the spreading device. The adjustment position of the second right deflection 6r and the right outlet guide 7r corresponds to the in FIG. 1 dashed line position shown. However, the second left-hand deflecting device 6l and the left-hand outlet guide device 7l are moved into the path of the left-hand web strand B1, for example into the in FIG. 1 shown in a solid line other extreme position. The reel changer 1 is in the embodiment of FIG. 3 adjusted so that the right track strand Br is promoted as far as possible right outside. The right outer edge of the web track Br coincides with the right boundary line of the web spreading device. The arrangement of the spreading relative to the formers 20 and 21 is such that the web strands of a web B of maximum width Z = M run without parallel offset, each centered on the former 20 and 21. In the embodiment of FIG. 3 the right-hand web strand Br is conveyed with its outer edge at its outermost right-hand edge along the center of the associated longitudinal rebate hopper 21. The narrower to the double offset of the axes S and S _B left web strand Bl would be eccentrically promoted to its associated Längsfalztrichter 20, although he would pass the web spreading uninfluenced. However, the second left-hand deflecting device 6l has been moved together with the left-hand outlet guide 7l relative to the first left-hand deflecting device 5l into such an adjustment position that it experiences a parallel displacement corresponding to the spreading dimension X, which is so great that the left-hand web strand Bl is centered is conveyed to the associated Längsfalztrichter 20.

For the second embodiment, it is assumed that the web B has a different width Z than the web B of FIG FIG. 2 has shown first example. The distance X of The outer edge of the left web strand Bl from the left boundary line corresponds to the spread dimension X. The widths of the web strands Bl and Br are indicated by B and C. Both sides of the fold lines Ll and Lr have the web strands Bl and Br because of the central conveying on the Längsfalztrichter 20 and 21 each have the same widths, which are given for the left web strand Bl with B 'and for the right web strand Br with C'.

In the in FIG. 4 illustrated third embodiment, the web B is supported by the paster 1 symmetrical to the machine axis S, ie, the machine axis S coincides with the central longitudinal axis S _{B of} the web B. Since the longitudinal section is performed on the machine axis S, the two resulting web strands Bl and Br each have the same width A, wherein it is assumed that the width Z of the web is the same as in the embodiment of FIG. 2 is. In the embodiment of FIG. 4 the web spreading device is in the same state as in the second embodiment. The right-hand web strand Br passes the web spreading device accordingly unaffected. Unlike in the embodiment of FIG. 3 However, the right web strand Br to the rightmost edge on a distance Y, so that the right web strand Br as in the first embodiment of the FIG. 2 shown only longitudinally would be folded along, if it would spread the web spreading device to the parallel offset Y / 2 with respect to the machine axis S to the right outside parallel. In the web strand guide of the third exemplary embodiment, the right-hand web strand Br is consequently conveyed eccentrically onto the longitudinal folding hopper 21 and, accordingly, folded longitudinally off-center. The printed image printed on it is correspondingly asymmetrical. The part width of the right web strand Br to the one side of the longitudinal fold line Lr is denoted by A "and the width different therefrom to the other side of the longitudinal fold line Lr is denoted by A"'. The second left-hand deflecting device 6l assumes such an adjustment position relative to the first left-hand deflecting device 5l that the left-hand web strand Bl is conveyed centrally onto the longitudinal-folding hopper 20. The parallel offset X of the left web strand Bl corresponds to the Spreizmaß. The partial widths on both sides of the longitudinal fold line L1 are the same in the left-hand web strand B1 and are accordingly denoted by A '.

Upon entry of a free web start of a new web, the new web is passed from the reel changer 1 via the inlet guide 3 and between the cut-off cutting rollers of the cutter 4. Subsequently, the beginning of the web is straight, that is performed without looping around the deflection 5l to 6r and outlet guide 7l and 7r up to the other outlet guide 8 and looping around the outlet guide 8 and optionally via even more guide devices through the pressure nip or more Pressure column of the printing tower 9 fed to the formers 20 and 21. The former 20 and 21 may, as already mentioned, be a single former, to which both web strands Bl and Br are brought together. The second baffles 6l and 6r and the outlet baffles 7l and 7r take their in FIG. 1 dashed shown lower end position. The still uncut web at the feeder is also shown in dashed lines and designated B '. After the web B 'has reached the or the former, it is cut longitudinally with the cutter 4 in the web strands Bl and Br. Only when the web strands Bl and Br have passed the outflow guide devices 7l and 7r downstream downstream outlet guide device 8, or will only one of the second deflection 6l and 6r and thus together with the associated outlet control devices 7l and 7r in their Adjustment (s) moves and thereby set the desired Spreizmaß X. By in the context of the setting continuous movement of the second deflection device (s) 6l and / or 6r and outlet guide (s) 7l and / or 7r the web strands Bl and Br are continuously spread apart until the setting of Spreizmaßes X from each other.

In order to reduce the friction, the deflection devices 5l to 6r have blowing air holes on their mantle surfaces, through which the wrap-around web strands Bl and Br can be exposed to blown air, as known from turning bars. As soon as one of the deflection devices 5l to 6r is moved against the relevant web strand Bl or Br, the blowing air is switched on. The switching on of the blowing air is of course automated, for example as a function of the adjustment position of the second deflection devices 6l and 6r and preferably under the control of the control device 15.

The predetermined by the shape of the two linear guides 11 adjustment paths of the second deflection 6l and 6r and outlet guide 7l and 7r extend obliquely linear to the orbital plane each within a perpendicular to the web plane, pointing longitudinally to the web Verstellwegebene. The two adjustment paths are parallel to each other, as already mentioned. The orientation of the adjustment paths is further such that the second deflection means 6l and 6r and outlet guide means 7l and 7r are moved to increase the spread dimension X against the web conveying direction F. In the extreme position of the maximum spread, the web strands Bl and Br run between the first deflecting means 5l and 5r and the second deflecting means 6l and 6r at a right angle to the web plane defined by the inlet guide 3 and the first deflecting means 5l and 5r. As already mentioned, the web path level defined by the second deflection devices 6l and 6r and the outlet guide devices 7l and 7r is parallel to this web plane. The web plane between the inlet guide 3 and the first deflection 5l and 5r on the one hand and the Bahnstrangebene between the second deflection 6l and 6r and the outlet guide means 7l and 7r on the other hand are parallel in all adjustment positions.

Claims (13)

1. A web spreading device for a web processing machine, in particular a rotary printing machine, said web spreading device comprising:

   a) a frame (2);

   b) a cutting means (4) for longitudinally cutting a web (B) into a left-hand web strand (Bl) and a right-hand web strand (Br);

   c) a first left-hand deflecting means (5l) for the left-hand web strand (Bl);

   d) a second left-hand deflecting means (6l) for the left-hand web strand (Bl), which is arranged downstream of the first left-hand deflecting means (5l) in the web conveying direction (F);

   e) a first right-hand deflecting means (5r) for the right-hand web strand (Br), which points towards the first left-hand deflecting means (5l);

   f) and a second right-hand deflecting means (6r) for the right-hand web strand (Br), which is arranged downstream of the first right-hand deflecting means (5r) in the web conveying direction (F) and points towards the second left-hand deflecting means (61),

   g) wherein the web strands (Bl, Br) can be spread relative to each other in parallel by a degree of spreading (X) by looping around the deflecting means (5l, 6l, 5r, 6r),

   h) and wherein at least one of the left-hand deflecting means (5l, 6l) and at least one of the right-hand deflecting means (5r, 6r) are mounted in the frame (2) such that they can each be moved by an adjustment path, in order to be able to adjust the degree of spreading (X),
   characterised in that

   i) one of the second deflecting means (6l, 6r) can be moved by an adjustment path relative to the other of the second deflecting means (6l, 6r) and/or one of the first deflecting means can be moved by an adjustment path relative to the other of the first deflecting means, such that the length of the strand path between the left-hand deflecting means (5l, 6l) differs from the length of the strand path between the right-hand deflecting means (5r, 6r).
2. The web spreading device according to the preceding claim, characterised in that either the first deflecting means (5l, 5r) or the second deflecting means (6l, 6r) are fixedly clamped in the frame (2).
3. The web spreading device according to any one of the preceding claims, characterised in that the at least one movably mounted left-hand deflecting means (6l) and the at least one movably mounted right-hand deflecting means (6r) are both a first deflecting means or are both a second deflecting means (6l, 6r).
4. The web spreading device according to the preceding claim, characterised in that the at least one movably mounted left-hand deflecting means (6l) and the at least one movably mounted right-hand deflecting means (6r) can be moved on their adjustment paths into a number of adjustment positions and into joint web strand planes in which they jointly form an arrow shape.
5. The web strand device according to the preceding claim, characterised in that the at least one movably mounted left-hand deflecting means (6l) and the at least one movably mounted right-hand deflecting means (6r) can be moved jointly moved along their adjustment paths, while maintaining their arrow shape.
6. The spreading device according to any one of the preceding claims, characterised in that a control means (15) is provided which comprises a drive means (12) for the movably mounted deflecting means (6l, 6r) in order to move the movably mounted deflecting means (6l, 6r) into the adjustment positions required for setting the degree of spreading (X) and to fix them in the adjustment positions.
7. The web spreading device according to any one of the preceding claims, characterised in that the spreading device comprises a left-hand run-out channelling means (71) for the left-hand web strand (Bl) and a right-hand run-out channelling means (7r) for the right-hand web strand (Br), which are mounted in the frame (2) such that they can be moved relative to each other downstream of the second deflecting means (6l, 6r) in the web conveying direction (F), and in that the run-out channelling means (7l, 7r) and the movably mounted second deflecting means (7l, 7r) can be moved into adjustment positions in which they jointly determine a plane for the web strands (Bl, Br).
8. The web spreading device according to the preceding claim, characterised in that the left-hand run-out channelling means (7l) and the second left-hand deflecting means (6l) are mounted such that they can be moved jointly, and the right-hand run-out channelling means (7l) and the second right-hand deflecting means (7l) are also mounted such that they can be moved jointly.
9. The web spreading device according to any one of the preceding claims, characterised in that the movably mounted deflecting means (6l, 6r) can be moved into adjustment positions in which only the left-hand deflecting means (5l, 6l) are looped around by the left-hand web strand (Bl) or only the right-hand deflecting means (5r, 6r) are looped around by the right-hand web strand (Br), in order to offset one of the web strands (Bl, Br) in parallel and to convey the other of the web strands (Bl, Br) through the spreading device without being offset.
10. The web spreading device according to any one of the preceding claims, characterised in that the movably mounted deflecting means (6l, 6r) are linearly guided on their adjustment paths.
11. The web spreading device according to the preceding claim, characterised in that the movably mounted deflecting means (6l, 6r) project from carriages (10l, 10r) which are each guided on a linear guide (11) of the frame (2).
12. The web spreading device according to any one of the preceding claims, characterised in that the cutting means (4) and the deflecting means (5l, 6l, 5r, 6r) are mounted such that they can be jointly moved transverse to the web conveying direction (F), relative to the web (B).
13. The web spreading device according to any one of the preceding claims, characterised in that the web spreading device is used as an actuating member of a web edge controller of at least one of the web strands (Bl, Br).

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