EP1388515B1 - Device for adjusting a cutter registration - Google Patents

Abstract

The cutting register regulator (10) for a printing machine web feed adjusts the cross cutting register for the web strings (B1,2) which are turned around axes by feeds (11,12), with one axis being adjustable with respect to the other in a frame (14,16), so that the length of the feed path of one web is adjustable relative to the other. The register regulator is upstream of the turning rod assembly (8) in the feed direction. Claims include a method of adjustment for the cutting register.

Description

The invention relates to cut register adjustment devices in printing machines in which an endlessly conveyed web is printed or preferably a plurality of such webs are printed. Furthermore, the invention relates to a method for adjusting the cut register of printed web strands obtained from one or more webs by slitting. The printing machine is preferably a web-fed printing press in which the web or the plurality of webs are each unwound from a roll continuously. The invention is particularly preferably used in web-fed rotary printing of large newspaper editions.

In the current print production of such printing machines, the web or are usually a plurality of webs with at least two juxtaposed printed images continuously printed. As seen in the conveying direction, the web can be successively printed each with the same print image or a periodic sequence of two or basically even more different print images. Between the juxtaposed printed images, the web or the multiple webs is cut longitudinally into web strands. Several web strands are combined into a bundle according to the current print production and cut together across the conveying direction of the respective bundle, in order to obtain the individual printed products, for example newspapers or magazines. In newspaper printing, several bundles are generally merged together to obtain the printed product and cut together across. The web strands, which each form a bundle, are combined so that the printed images of the web strands of a Bundles are centered as accurately as possible between two consecutive sections in the conveying direction. The web strands of a bundle are influenced by suitable operations for obtaining their so-called cut register, ie for the centering between the cuts. In relation to the individual web strand, these operations are changes to the path length made specifically for the cutting register of the relevant web strand, which the web strand travels between the location of the printing and the location of the transverse cutting. By a targeted Weglängenänderung thus the cut register position of the strand in question, or in short, the cut register set.

For the adjustment of the cutting register, cutting register rollers have proven themselves. The cut register rollers are each looped around by a web strand, usually by 180 °. By an adjusting movement of a cutting register roller transversely to its longitudinal axis, the path of the track looping around it is lengthened or shortened and in this way the cutting register of the relevant web strand is adjusted.

In known printing machines, a printed web strand is guided over an array of turning bars and turned there and / or swept. After turning and / or sweeping, the web strand is used to perform the operations necessary to adjust the cut register, and finally the web strand is gathered together with one or more further web strands and cut transversely.

Cumbersome designed in the known cutting register adjustment devices, the retraction of a new track. The problem is exacerbated by the generally tight space around cut register rolls. The cut register rollers must also each have twice the width of the web track to be treated, since the web strand can be turned in the one print production and swept in the other.

The DE 35 15 626 A1 discloses an apparatus and method for controlling the grid of a cutting apparatus in rotary printing presses. A paper web is transported through a printing unit and then cut longitudinally in a Zwischenzugwalze in a first and a second web strand. One of the two web strands is transported via a turning bar and then via an adjustment device used for adjusting the cut register to a folding tension roller, in which the two web strands are brought together again. The other web strand is transported over a turning bar to be deflected over a compensating device for Falzzugwalze.

The US 5,048,810 shows a folder of a printing press. A paper web is guided around compensating rollers and then cut longitudinally into a first and a second web strand. The web strands are each deflected by a turning bar and then brought together on a nip roll. The cutting position of the two web strands to each other is adjusted via an adjustment of the turning bars.

It is an object of the invention to make a cut register setting device and a method for setting the cut register so that a new web strand can be fed by machine via a cut register roller or other equally suitable deflection of the cutting register adjustment device.

The invention relates to a printing press with at least one printing unit for printing a web, a longitudinal cutting device, a device for merging web strands, a cross-cutting device and a cutting register adjustment device. In the printing unit, the web is continuously printed with at least two juxtaposed printed images. The printed web is cut longitudinally by the longitudinal cutting device between the printed images into a first web strand and at least one further, second web strand. The longitudinal cutting device can also be arranged in front of the printing unit and longitudinally cut the still unprinted web into the at least two web strands, which are subsequently printed in strands. The device for merging web strands comprises a turning bar device for turning and / or sweeping the second web strand. The second web strand is preferably brought together with the first web strand. In principle, however, the first web strand and the second web strand can each be combined with one or more other web strands to form a different web strand bundle. The cross-cutting device serves for the transverse cutting of a web strand bundle comprising at least the second web strand, preferably also the first web strand. The cutting register adjustment device comprises a frame, a first deflection device for deflecting the first web strand about a first deflection axis and a further, second deflection device for deflecting the second web strand about a second deflection axis. The second deflecting device is movably mounted in the frame relative to the first deflecting device so that the length of the path traveled by the second web strand is changed relative to the length of the path of the first web strand by a movement of the second deflecting device relative to the first deflecting device , Although the deflection devices may in principle be formed by rollers or other deflecting bodies, in particular rotatably mounted rotary bodies, arranged side by side along the respective deflection axis, each of the deflecting devices is preferably formed as a roller in the manner of the known sectional register rollers, particularly preferably as a circular cylindrical roller.

According to the invention, at least the second deflection means, i. the deflecting device for the second web strand to be guided through the turning bar device, arranged in front of the turning bar device. The second web strand can be pulled by this measure in a simple manner by machine up to the Wendenstangeneinrichtung.

The arrangement of the first deflection device also in front of the turning bar area is advantageous, for example, if the first web strand in the turning bar device is to be turned and / or swept. However, an arrangement of the two deflection devices transverse to the web strands next to each other, wherein the deflection axes formed by them preferably extend in the same plane, is always advantageous, even if the first web strand, bypassing the turning bar device directly, i. without turning and / or sweeping, further conveyed and combined with the second web strand or one or more other printed in the printing machine web strands to a web strand bundle. The diverters for the web strands of the web are arranged in a preferred embodiment of the invention so that a not yet longitudinally cut web can be pulled around the deflectors simultaneously, whereby the machine web feed is considerably facilitated. To achieve this, no other deflection devices are arranged between the deflection, which are wrapped only by a single of the web strands of the web. Preferably, they are even arranged side by side in the sense that no other deflection devices for the web are arranged on the path of the web between them. Preferably, the web feeder is cut longitudinally only when the web has been pulled in by the cut register adjusting device thus formed.

The arrangement of the reversing device for the single or multiple turning strands of the web in front of the turning bar device has the further advantage over the simplification of a machine web take-in that the associated deflecting the width of a simple strand and not more, as before, have at least twice the strand width got to.

In the embodiment in which the baffles are arranged side by side transversely to the web strands in proximity, they are preferably supported on only one side of the frame, while each projecting with a free end in the direction of the other frame side. By means of an adjustment movement taking place between the two deflection devices, the two deflection devices can preferably be brought into a position in which they are aligned with one another and form a preferably cylindrical, smooth, uniform surface for the web to be pulled in.

In simple embodiments, it is sufficient that only the second deflection device for the execution of adjusting movements in the frame is movably mounted. Preferably, however, the first deflecting device is also movably mounted in the frame. The movable mounting and the first deflection is advantageous, for example, if in one or the other print production, the first web strand to be turned and / or swept. However, if the first web strand is neither turned nor swept before the bundle formation, but is combined as a direct strand with the second web strand and / or one or more further web strands, the movable support of the second deflection device is likewise advantageous. Especially for this case, new possibilities of cut register setting are opened, if the extent of mobility is only sufficiently large. A maximum length of an adjustment path of the first deflection device should be at least half as large as a maximum length of an adjustment path of the second deflection device. More preferably, it is at least substantially or exactly as large as the maximum length of the displacement of the second deflection device.

In a preferred method of setting the cut register, in which the first web strand forms a direct strand of a web strand bundle, namely, the path length of the first web strand is changed, in coordination with the further or more further web strands of the bundle. If, for example, only the first and the second web strand form a web strand bundle, the cut register positions of the two web strands can be adjusted by substantially equal, preferably exactly equal, adjustment paths of the first deflection device and the second deflection set. It then no longer needs to be compensated for the entire position difference or at least the much larger part of the position difference in the second web strand, but only approximately or exactly half the position difference, while the remaining balance is compensated in the direct strand. In the same way, this applies if the first web strand and the second web strand are merged with even more web strands or the first web strand is not merged with the second web strand but only with another web strand or other web strands to form a web strand bundle. The cut registers of the web strands per bundle are adjusted in such a way that the setting time required for the setting of all cut registers of these web strands is reduced compared to the known setting method or is preferably even minimal. By means of coordinated adjusting movements of the deflecting devices acting on the web strands of the bundle, which serve for the cutting register adjustment, the largest displacement path which a single one of these deflecting devices has to carry out can be reduced, preferably minimized. Since the time required for setting the cut register of all web strands of a bundle is proportional to the largest of the adjustment paths at the same adjustment speed of the deflecting devices or at least determined by the largest of the adjustment paths, which must cover one or more of the deflection, the set time and thus the waste be reduced.

Preferred further features of the invention are disclosed in the subclaims and by the claimed combinations of features of several subclaims with the independent claims.

Figur 1

eine Druckmaschine mit einer Schnittregister-Einstellvorrichtung, die vor einer Wendestangeneinrichtung angeordnet ist,

Figur 2

eine Ansicht der in einem ersten Zustand befindlichen Schnittregister-Einstellvorrichtung,

Figur 3

eine perspektivische Darstellung der in einem ersten Zustand befindlichen Schnittregister-Einstellvorrichtung und

Figur 4

eine perspektivische Darstellung der in einem zweiten Zustand befindlichen Schnittregister-Einstellvorrichtung.

An embodiment of the invention will be explained below with reference to figures. 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 printing machine with a cutting register adjustment device, which is arranged in front of a turning bar device,

FIG. 2

4 is a view of the cutting register adjusting device in a first state;

FIG. 3

a perspective view of the present in a first state cutting register adjustment device and

FIG. 4

a perspective view of the present in a second state cutting register adjustment device.

FIG. 1 shows the path of a web B through a web-fed rotary printing press for newspaper printing. The web B is unwound from a roll, which is rotatably mounted in a roll changer 1, and conveyed in a conveying direction F by a printing unit 2. It is printed on both sides in the printing unit 2. The printing unit 2 comprises two blanket cylinders 2a, between which a printing gap for the continuous web B is formed. The blanket cylinders 2a are each associated with a printing form cylinder 2b. The printing form cylinders 2 b transfer their printed images, which are in the form of images with printing ink, onto the blanket cylinders 2 a, from which they are finally printed on the web B. The blanket cylinders 2a are preferably not mechanically coupled to each other, but are each driven by a separate drive motor electronically synchronized and drive in turn via a respective mechanical gear on the associated printing form cylinder 2b. The printing form cylinder 2b carry at its periphery in the cylinder longitudinal direction side by side at least two printing plates, the printed images are imaged on the web B accordingly side by side. In the circumferential direction, a single or it may, as usual, two printing plates or in principle even more printing plates are provided one behind the other on the printing forme cylinders 2b. The printing plates have seen in the cylinder longitudinal direction depending on the width of an open newspaper.

For the formation of the individual printed copies, newspaper copies in the exemplary embodiment, the web B is cut longitudinally after printing by means of a longitudinal cutting device between the printed images. The longitudinal cutting device is formed by a cutting roller 3a and a counter-roller 3b, which are each arranged to one side of the web B opposite to each other. By longitudinal cutting two web strands B1 and B2 are obtained from the web B, which in Be referred to below as the first web strand B 1 and second web strand B2. The web strands B1 and B2 are then conveyed together via a tension roller 4 to a cutting register adjustment device 10. When leaving the cut register adjustment device 10, the paths of the web strands B1 and B2 are separated. The first web strand B 1 is guided from the cut register setting device 10 only via web guiding means without turning or weaving operations to a longitudinal folding device 9, which is preferably designed as a folding hopper. The second web strand B2 runs out of the cut register adjustment device 10 and into a turning bar device 8. When passing through the turning bar device 8, the second web strand B2 is turned and / or swept and then brought together via an inlet roller of the Längsfalzeinrichtung 9 with the first web strand B 1 to a web strand bundle, which consists in the embodiment only of the two web strands B 1 and B2. However, it is also possible that one or more further web strands of another web or of several other webs are combined with the two web strands B 1 and B2 in front of the longitudinal folding device 9. The superimposed in the bundle web strands B 1 and B2 are longitudinally folded together during the passage through the longitudinal folding device 9 and conveyed into a cross-cutting device 25. In particular, the cross-cutter 25 may be a cutting cylinder of a folder as commonly used in newspaper web-fed rotary printing. The longitudinally folded and cross-cut single copies of printed products are designated P. If it is, as in the embodiment, newspaper copies, they are still cross-folded after the cross-cutting, to finally get the newspaper copies. Although a web-strand bundle consisting only of the web strands B1 and B2 can form a printed product P after the cross-cutting, further web strands bundles B1 / B2 are formed in newspaper printing and the cross-cut webs are then cross-cut in the transverse cutting device 25 ,

By means of the cutting register adjustment device 10, it is ensured that the printed images of the web strands B1 and B2 always come to lie between two successive sections of the cross cutting device 25 and between the cuts of the practice are appropriately centered, that are sufficiently accurately positioned with respect to the common cutting register. For this positioning, the different paths of the web strands B 1 and B2 from the pressure to the location of the merge in the Längsfalzeinrichtung 9 and optionally an offset of the juxtaposed printing plates of the printing forme cylinder in the circumferential direction, ie an offset of the printed images of the first web strand B 1 the printed images of the second web strand B2 in the conveying direction F, are compensated. In newspaper printing such an offset is common to reduce imbalances due to channel beats of the color-coded cylinders of the printing units. Also to be considered is the length measured in the conveying direction F of the printed images, which is ultimately represented in a printing machine control by the scope of the printing form cylinder. If due to the different paths of the web strands B 1 and B2 occur in a practically relevant extent for the SchnittregisterPosition relevant differences in length due to different longitudinal strains, these the cutting register affecting length differences are compensated by means of the cutting register adjustment device 10. The different influencing factors lead to the position of the printed images of the web strands B 1 and B2 deviating from the correct cutting register position. These deviations are referred to as positional differences in the following.

The cutting register adjustment device 10 comprises two deflection devices, namely a first deflection device 11 and a second deflection device 12, a deflection roller 5 at the inlet to the deflection devices 11 and 12 and a further deflection roller 6 at the outlet from the deflection devices 11 and 12.

The two web strands B 1 and B2 loop around the inlet guide roller 5 and also the outlet guide roller 6 each together, ie parallel to each other. At the outlet deflection roller 6, the web strand paths separate. The first web strand B1 is passed without turning or Kehroperationen through the area of the turning bar device 8. The first web strand B 1 can therefore also be referred to as a direct strand. The second web strand B2 runs from the outlet guide roller 6 via an inlet roller 7 in a turning bar plane of the turning bar device 8, and is turned by appropriate web guide there and / or swept and anschießend with the first web strand B1 merged. The second web strand B2 can therefore also be referred to as a reversing or sweeping strand.

When passing through the cutting register adjustment device 10, the first web strand B 1 is guided via the first deflection device 11 and the second web strand B2 via the second deflection device 12 and deflected around the deflection axis formed by the respective deflection device 11 or 12. The inlet guide roller 5 and the outlet guide roller 6 are arranged to the deflection devices 11 and 12 so that the first web strand B 1, the first deflection 11 and the second web strand B2, the second deflection 12 each loop through 180 °, so that the web strands B1 and B2 each run parallel to their deflection 11 or 12 and run away from it. The two guide rollers 5 and 6 are stationary, but rotatably mounted roller body. The deflection devices 11 and 12 are also each formed by a rotatably mounted roller body. Both deflection devices 11 and 12 are mounted transversely to their axes of rotation, which at the same time also form said deflection axes, linearly movable back and forth along a common axis of movement in a common plane of movement. The direction of movability (movement axis) has parallel to the incoming from the inlet guide roller 5 to the deflecting means 11 and 12 and from the deflecting means 11 and 12 to the outlet guide roller 6 expiring web strands B 1 and B2. The direction of reciprocation is indicated at the deflection 11 and 12 each with a double arrow.

The arrangement of the cutting register adjustment device 10 in the path of the second web strand B2, ie the turning strand, in front of the turning bar device 8 has the advantage that its deflecting device 12 influencing the cutting register position can be realized in the width of the second web strand B2 and not, as in a conventional arrangement behind the turning bar device 8, which must have double web strand width. The adjustment of the cut register for the second web strand B2 before performing the turning and / or Kehroperation also allows the automated collection of the web start of a new web to behind the cut register adjustment device 10 for the second web strand B2.

In FIG. 2 a guideway 17 of a machine and in this sense automatic Bahneinzugssystems is located. The guideway 17 is formed by guide rails, which are arranged on one side next to the Bahnleitmitteln and serve the leadership of a driven pulling-in means. In particular, the guide track 17 leads around the deflection devices 11 and 12 of the cutting register adjustment device 10. The guide track 17 is also guided around the entry guide roller 5 and the exit guide roller 6 and further along the path of the first track B 1. When pulling in a new train B, the in FIG. 2 is indicated, the web start along the guide track 17 between the cutting roller 3a and the counter-roller 3b is passed to the draw roller 4, the inlet guide roller 5, to and around the two deflection 11 and 12 and from there back and around the outlet Deflection roller 6 and further drawn along the path of the first web strand B 1.

FIG. 3 shows the web B in this state immediately after machine retraction over the entire path of the later first track B1. In this state, the rollers 3a and 3b of the slitter are moved against each other and the web B is cut longitudinally between the later printed images. After a web start was formed for the second web strand B2, for example by manual tearing after slitting, the web start of the second web strand B2 is manually from the outlet guide roller 6 via the inlet roller 7 for the turning bar device 8, through the turning bar device 8 through and over Subsequent Bahnleitmittel retracted. The manual retraction over a deflection of a cutting register adjustment device is saved, which brings time advantages and contributes to the reduction of Einziehfehlern.

FIG. 4 shows the web B after the longitudinal cutting and before the formation of a web start for the second web strand B2.

In FIG. 1 is also a control and regulating device shown, which serves the control and regulation of the adjustment movements of the two deflection devices 11 and 12. The control and regulating device comprises two sensors 23 and 24, a control and regulating member 20 and two motor actuators 21 and 22. The sensor 23 detects the position of the printed image on the first web strand B1 running through under it, and the sensor 24 detects the position of the printed image on the second web strand B2 passing under it. The position signals of the sensors 23 and 24 are supplied to the control and regulating member 20. The control and regulating member 20 calculates the two sensor signals by means of a suitable algorithm and forms from this by comparison with input command signals, the control signals for the actuators 21 and 22. The actuator 21 is coupled to the first deflecting device 11 and the actuator 22 to the second Deflection device 12. The actuators 21 and 22 act on the deflection devices 11 and 12 in accordance with the control signals formed by the control element 22, ie they effect the adjustment movement of the deflection devices 11 and 12 along their common movement axis. In the current printing operation, the control and regulating member 20 with the sensors 23 and 24 and the actuators 21 and 22 forms a control for the setting of the correct cut register position for each of the web strands B 1 and B2. In particular, when recording a new print production these members form a control and regulation until the receipt of a basic setting.

The Figures 3 and 4 The cut register setting device 10 and its immediate vicinity each show the same view in a three-dimensional representation, but in two different states of the cut register setting device 10. The states are differentiated by the positions which the deflection devices 11 and 12 occupy with respect to each other. Evident is in particular the formation of the two deflection devices 11 and 12 each as a strand width, circular cylindrical, smooth roll body. Due to the design as only single-width roll body, the deflecting devices 11 and 12 can be arranged side by side in a small space. The arrangement and movable mounting of the deflectors 11 and 12 is such that they are in a first state, which in FIG. 3 is shown, with respect to the conveying direction F of the web B occupy the same height and even, as is particularly preferred, axially continuous form a smooth, uniform roll body. The roller body formed jointly by the two deflection devices 11 and 12 forms a simple guide roller when drawing in the web start of a new web. The unavoidable clear gap between the free ends of the roll body is within tolerances kept so narrow that it can be neglected for the entry of the web B. In this sense, the roll body is uniform. The deflecting axes formed by the deflecting devices 11 and 12 are aligned in the first state. In the first state, the deflecting devices 11 and 12 each assume their starting base position relative to each other, in which a web with a free web beginning is pulled in.

From the first state, the deflecting devices 11 and 12 can be moved apart by means of the actuators 21 and 22 in opposite directions, for example in the in FIG. 4 shown second state in which their deflection axes are offset parallel to each other at a maximum distance. In the second state shown, the deflection devices 11 and 12 assume positions in which the path path of the first web strand B1 has a minimum length and the path path of the second web strand B2 has a maximum path length. The diverters 11 and 12 can be moved from the position they take in the first state to its other two extreme positions, if required by the cut register control. Intermediate states are of course also adjustable, preferably continuously.

To obtain the adjusting movements, the deflecting devices 11 and 12 are each guided linearly guided on their outer, mutually remote axial ends on one side of a frame along the axis of movement. The frame side, on which the first deflecting device 11 is mounted, is denoted by 14, and the frame side, on which the second deflecting device 12 is mounted, is designated by 16. The frame sides 14 and 16 each form a parallel to the axis of movement guideway. The deflecting devices 11 and 12 are each rotatably mounted on one of two carriages 13 and 15, which is linearly guided along the guideway formed by its frame side 14 or 16. By the two carriages 13 and 15 is provided for a rigid support of the deflecting means 11 and 12 at their respective frame side 14 or 16. The deflecting axes formed by the deflecting devices 11 and 12 each have a right angle to the guideways formed by the frame sides 14 and 16.

The adjustability of the deflectors 11 and 12 is designed by their storage and the coupling with the actuators 21 and 22 so that the positioning of the Cutting register of the two web strands B 1 and B2 required adjustment movements on the deflecting devices 11 and 12 can be divided, preferably at least substantially each half, more preferably exactly half each. Accordingly, the maximum lengths of the adjustment of the deflectors 11 and 12 are the same. Due to the advantageous storage of the deflecting devices 11 and 12 directly next to one another, the adjustment paths are even the same, ie the deflection axis formed by the first deflection device 11 and the deflection axis formed by the second deflection device 12 can be moved back and forth between the two same outer extreme positions. The two deflection devices 1 and 12 are therefore equivalent in the ideal case described by way of example.

The adjustability of the first deflector 11 opens up new possibilities for adjusting the cut register of the direct strand and the turning strand, i. for the control and / or regulation of the web strands B 1 and B2.

In the adjustment of the cutting register conventionally existing between direct strand and reversing strand difference in the positions of the respective printed images is compensated solely by changes in length of the web path of the turning strand. On the other hand, the printing unit ensures that the printed image on the direct line is positioned in the cut register. An adjustment of the length of the path of the direct line is made at most to a limited extent, this adjustment is not carried out in relation to the cut register of the other web strand or the Schnittregistem the several other strands of the bundle, but solely with respect to the position of Section in the cross cutter. In the context of the invention, the path length of a strand is understood to be the length of the path of the relevant strand from its formation, that is to say the location of the longitudinal cutting up to the merging in the strands B1 and B2. In the known adjustment method, the direct strand is the guide strand of the bundle to which the other web strands of the bundle are adjusted. This type of cut register setting requires, in the case of the other web strand or the several other web strands of the bundle, large adjustment paths for their adjustment devices serving for the adjustment. The adjustment paths are typically of the order of 200 to 400 mm. On the other hand, that is Speed of the adjustment limited. Thus, a linear register, as each of the deflecting means 11 and 12 represents a, the strand path according to experience to extend by a maximum of 1 mm per meter. If, for example, an adjustment travel, ie register travel, of 300 mm is required in order to switch from a print production to another print production with uninterrupted print production, at least 300 web meters pass through the printing press before the cut register is readjusted. If the print products are newspaper copies whose length is 1 m to simplify the estimation, then the new cut register is only set after 300 printed copies. The first 300 printed copies of the new production are waste paper.

Due to the particular adjustability of the deflection device 11 for the direct, first web strand B 1, however, the adjustment movement required for the cutting register adjustment can now be divided between the two web strands B1 and B2. More generally, the adjustment path for the turning strand of the web strand bundle is reduced by a part thereof, preferably half of the adjustment path for the turning strand, from the Schnittregistereinstellglied for the direct strand, in the embodiment, the first deflection 11, is taken over. The total Verwellweg required is preferably divided evenly. If the direct strand is combined with several web strands into a bundle, the adjustment paths are preferably divided as evenly as possible on the web strands to be joined. The adjustment is advantageously carried out under the optimization strategy that the positioning time is minimal assuming the same adjustment speeds for the setting of the cutting register.

It is precisely this setting concept that is realized by means of the cut register adjusting device 10 of the invention. Instead of carrying out the entire positional difference of the cutting register of the second web strand B2 by the adjusting movement of the second deflecting device 12, a part, preferably half, of the adjusting movement is transferred to the first deflecting device 11. If only the setting of the cut register of the second web strand B2 whose reversing device 12 along its axis of movement would have to be adjusted by 300 mm to compensate for a position difference of the web strands B 1 and B2 of 600 mm, it is necessary for a half division for the Deflection devices 11 and 12 out of their starting positions, which they occupy before adjustment, only one adjustment of 150 mm. The path of the first web strand B 1 is extended to the same extent as the web path of the second web strand B2 is shortened. Depending on the starting positions from which the deflection 11 and 12 are adjusted, and the path length changes to be made, can also be a setting in the opposite direction, ie a shortening of the path of the first web strand B 1 and extending the path of the second web strand B2 be advantageous. The reduction of the length of the adjustment path of the second deflection device 12 is particularly advantageous in the case of a change from one printed product to another in the case of continued printing production, since the waste can be considerably reduced.

However, the new cut register setting may result in the first web strand B 1 not being in register with the cut due to the change in length of its path, even if the color register (s) were in register prior to adjustment with the cut. The direct, first web strand B1 is otherwise brought into the register with the cut, for example by means of a registration roller for the web B or preferably by a coordinated adjustment of the circumferential register of the ink transferring to the web B cylinder. Likewise, the cross-cutting device can be adjusted in accordance with the path length changes of the web strands B1 and B2. Optionally, both the circumferential register of the color-transmitting cylinder and the cross-cutting device can be adjusted adjusted. This part of the registration is carried out jointly with all web strands B 1 and B 2 of the same web B or all web strands of the bundle. Pathway and strand-wise registration are matched for the cut per bundle and preferably executed simultaneously. The said on the basis of the embodiment with respect to the register by means of these further cut register adjusting members also applies to the general case of the invention, in which the considered web bundle beyond the web strands B 1 and B2 also one or more further web strands or only one of the web strands B 1 and B2 contains.

The invention is already advantageous for a printing machine for a single-sided, monochrome printing or a two-sided printing in a single printing nip of a printing unit, as for the purposes of explaining a reference to the FIG. 1 is described. The printing machine can have a plurality of printing units of this type, ie rubber-rubber printing units, and / or of other types, for example satellite printing units, wherein the different types of printing units are arranged and operated such that the web B is multicolored or a plurality of webs B is or will be printed in one or more colors. Preferably, each of the web-contacting and color printing on the web cylinder is ever driven by a separate motor, wherein the required synchronization of the respective cylinder is not mechanically, but signal technology, such as electronic, made. This type of formation of the pressure points is advantageous in view of the adjustment of the color register, with which preferably the adjustment of the direct strand B 1 is compensated for cutting. For each of the webs of a plurality of webs, a cut register adjustment device 10 according to the invention is preferably arranged in each case and also preferably has the further features of this adjustment device.

If the web strands B1 and B2 are combined with a third web strand B3 to form a bundle, for example, the position difference of the second web strand B2 to the section would be 300 mm and the position difference of the third web strand B3 to cut 400 mm, while the first web strand B 1 in If, for example, the measurement assumes a correct cut register position, ie the position difference is "zero", then the strand path length change required in the conventional adjustment methods would be 300 mm for the second web strand B2 and 400 mm for the third web strand B3, while nothing is compensated for in the first web strand B1 would be and the adjustment of the first deflection 11 would therefore be "zero". The largest Strangweglängenänderung and largest Verstellweglänge the respective deflection would be required for the third track B3. Its deflection would have to be moved by the largest Verstellweglänge from its original position. The total required response time would correspond to the time that would be required to the deflection for the third web strand B3 from their before the Adjustment assumed starting position to move the required for a strand path length change of 400 mm adjustment length.

Assuming that in the above example, the paths of both web strands B2 and B3 would have to be shortened, the path length of the first web strand B 1 is extended by 200 mm in the most optimal embodiment variant of the adjustment method according to the invention, in which the largest of the adjustment path lengths is minimized. Accordingly, the path of the second web strand B2 does not have to be shortened by 300 mm, but only by 100 mm. In particular, however, the largest of the Strangweglängenänderungen to be performed, namely that for the third web strand B3, significantly reduced. The shortening of the path length required for the third track B3 is no longer 400 mm, but only 200 mm. In the example, this corresponds to the minimum of the path length change for the third track B3. In the embodiment of the deflection devices described with reference to the exemplary embodiment, the largest of the adjustment path lengths by which one of the deflection devices must be adjusted is 100 mm. In the example, the first deflecting device 11 must be adjusted by 100 mm for an extension and the deflection device for the third web strand B3 by also 100 mm for a magnitude equal in magnitude shortening of the relevant strand path.

In the example above, the largest of the strand path length changes and the largest of the path lengths were minimized. However, the invention is not limited to such absolute minimization but also includes suboptimal embodiments of the adjustment method. Thus, it would also correspond to the invention if, based on the example, the path of the first track B1 is extended only by 150 mm, for example, and accordingly the path of the second track B2 is shortened by 150 mm and the path of the third track B3 is shortened by 250 mm to bring all three web strands B1, B2 and B3 to the same cut register position.

In the exemplary case explained above, the third web strand B3 may be a web strand which is obtained by longitudinal cutting from the same web B as the first web strand B 1 and the second web strand B2. The third track B3 However, it does not have to be from the same web B as the other two web strands B 1 and B2, but may have been obtained from another web by longitudinal cutting. In fact, it may even have been handled directly in web width from a roll. Finally, the web strands B 1 and B2 obtained from the same web B do not have to be brought together, but each of the web strands B 1 and B2 can each be combined with only one web strand or several web strands of other printed webs to form one web strand bundle. The inventive adjustment method, the inventive arrangement of individual or all Schnittregistereinstellglieder for the web strands in front of the turning bars and the arrangement of the provided per Bahn Schnittregistereinstellglieder for their strands in mutual proximity in many different web guides, which lead to the formation of web strand bundles advantageous.

Claims (21)

1. A printing machine, comprising:

   a) at least one printing unit (2) for printing a web (B);

   b) a longitudinal cutting means (3a, 3b) for longitudinally cutting the web (B) into a first web strand (B1) and at least one other, second web strand (B2);

   c) a means (8, 9) for merging the web strands (B1, B2) or for merging each of the web strands (B1, B2) with at least one other web strand, comprising a turning bar means (8);

   d) a transverse cutting means (25) for transversely cutting the merged web strands (B1, B2);

   e) and a cutting register setting device (10) which, for setting a cutting register of the web strands (B1, B2) with respect to transverse cutting, comprises a first deflecting means (11) for deflecting the first web strand (B1) about a first deflecting axis, and a second deflecting means (12) for deflecting the second web strand (B2) about a second deflecting axis, wherein the second deflecting means (12) is mounted such that it can be moved relative to the first deflecting means (11) in a frame (14, 16), such that the length of the path of the second web strand (B2) can be altered relative to the length of the path of the first web strand (B 1) by a movement of the second deflecting means (12) relative to the first deflecting means (11);
   characterised in that

   f) the cutting register setting device (10) is arranged upstream of the turning bar means (8) in the conveying direction (F) of the web (B).
2. The printing machine according to claim 1, characterised in that the first deflecting means (11) and the second deflecting means (12) are arranged next to each other, transverse to the second web strand (B2), in the frame (14, 16).
3. The printing machine according to any one of the preceding claims, characterised in that the second deflecting means (12) is mounted such that it can be moved and preferably linearly guided, transverse to the deflecting axis which it forms.
4. The printing machine according to any one of the preceding claims, characterised in that the first deflecting means (11) is mounted such that it can be moved and preferably linearly guided relative to the frame (14, 16) and the second deflecting means (12) and transverse to the deflecting axis which it forms, in order to also be able to alter the length of the path of the first web strand (B1).
5. The printing machine according to any one of the preceding claims, characterised in that the first deflecting means (11) can be moved by a first maximum adjustment path length and the second deflecting means (12) can be moved by a second maximum adjustment path length, and the first maximum adjustment path length is at least half as large as - preferably at least substantially as large as - the second maximum adjustment path length.
6. The printing machine according to any one of the preceding two claims, characterised in that a controlling and/or regulating means (20-24) comprising an actuating means (21, 22) is provided, by means of which the deflecting means (11, 12) can be moved such that the length of the path for one of the web strands (B1, B2) is increased and the length of the path for the other of the web strands (B1, B2) is decreased.
7. The printing machine according to the preceding claim, characterised in that the lengths of the paths of the web strands (B1, B2) can be simultaneously altered by means of the controlling and/or regulating means (20-24).
8. The printing machine according to any one of the preceding claims, characterised in that the second deflecting means (12) and/or the first deflecting means (11) can be moved to a position in which the deflecting means (11,12) can be jointly looped around by the web (B).
9. The printing machine according to any one of the preceding claims, characterised in that the first deflecting means (11) is a first roller body and the second deflecting means (12) is a second roller body, and the roller bodies jointly form a deflecting roller in a first position and each form a separate deflecting roller in a second position.
10. The printing machine according to any one of the preceding claims, characterised in that: the frame (14, 16) comprises a first frame side (14) and a second frame side (16) which opposes the first frame side (14) at a distance transverse to the web (B); the first deflecting means (11) is mounted on the first frame side (14) and comprises a free end facing the second frame side (16); and the second deflecting means (12) is mounted on the second frame side (16) and comprises a free end facing the first frame side (14).
11. The printing machine according to any one of the preceding claims, characterised in that a width of the first deflecting means (11) as measured in the direction of the first deflecting axis corresponds to the width of the first web strand (B1).
12. The printing machine according to any one of the preceding claims, characterised in that a width of the second deflecting means (12) as measured in the direction of the second deflecting axis corresponds to the width of the second web strand (B2).
13. The printing machine according to any one of the preceding claims, characterised in that a run-out deflecting means (6) immediately following the first deflecting means (11) and the second deflecting means (12) in the paths of the web strands (B1, B2) is jointly assigned to the first deflecting means (11) and the second deflecting means (12) in that it can be jointly looped around by the first web strand (B1) and the second web strand (B2).
14. The printing machine according to any one of the preceding claims, characterised in that a feed deflecting means (5) which is immediately and adjacently upstream of the first deflecting means (11) and the second deflecting means (12) in the path of the web (B) or the paths of the web strands (B1, B2) is jointly assigned to the first deflecting means (11) and the second deflecting means (12) in that it can be jointly looped around by the web (B) or by the first web strand (B1) and the second web strand (B2).
15. A method for setting the cutting register for a printing production, wherein:

    a) a web (B) comprising at least two printed images which are arranged next to each other, transverse to a conveying direction (F) of the web (B), is continuously printed;

    b) the web (B) is longitudinally cut into a first web strand (B1) and a second web strand (B2) between the printed images which have been printed on or are still to be printed on; and

    c) at least the second web strand (B2) is turned;

    d) after the second web strand (B2) has been turned, the web strands (B1, B2) are merged or are each merged with another printed web strand; and

    e) the merged web strands (B1, B2) are transversely cut between consecutive printed images in the conveying direction (F), in order to obtain individual printed products (P);
    characterised in that

    f) a cutting register position of at least the second web strand (B2) with respect to transverse cutting is set in a cutting register setting device (10) comprising a first deflecting means (11) looped around by the first web strand (B1) and a second deflecting means (12) looped around by the second web strand (B2), before the second web strand (B2) is turned, by a movement of the second deflecting means (12) which alters the length of the path of the second web strand (B2).
16. The method according to the preceding claim, characterised in that a cutting register position of the first web strand (B1) with respect to transverse cutting is also set in the cutting register setting device (10) by a movement of the first deflecting means (11) which alters the length of the path of the first web strand (B1).
17. The method according to any one of the preceding claims, characterised in that the first web strand (B1) is merged directly, i.e. without having been turned, with the second web strand (B2) or at least another web strand and is transversely cut.
18. The method according to any one of the preceding claims, characterised in that the first web strand (B1) and the second web strand (B2), alone or with at least one other web strand, are merged to form a bundle, and the cutting register positions of the web strands (B1, B2) of the bundle are set by a movement of both the first deflecting means (11) and second deflecting means (12), each by an adjustment path length and in accordance with each other.
19. The method according to the preceding claim, characterised in that the cutting register positions of the web strands (B1, B2) of the bundle are set simultaneously, in order to minimise the setting time required for setting the cutting registers of the web strands (B1, B2).
20. The method according to any one of the preceding two claims, characterised in that the cutting register positions of the web strands (B1, B2) of the bundle are set in such a way that the largest of the adjustment path lengths is minimised.
21. The method according to any one of the preceding claims, characterised in that:

    - the first web strand (B1) is merged with at least two other web strands, one of which is preferably the second web strand (B2), to form a bundle of web strands and is transversely cut in said bundle;

    - each of the web strands of the bundle is conveyed via at least one deflecting means each, which can be adjusted by an adjustment path length in order to be able to adjust the cutting register of the web strand which it deflects;

    - and in that the cutting registers of the web strands of the bundle are set in accordance with each other in such a way that the adjustment path lengths of the deflecting means necessary for this purpose are distributed onto the web strands.

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