Patent Grant
7559279
This is a US national stage of application No. PCT/EP2004/008751, filed on 4 Aug. 2004. Priority under 35 USC. 119(a) and 35 USC. 365(b) is claimed from German Application No. 103 35 886.2, filed 6 Aug. 2003.
1. Field of the Invention
The invention relates to a method and an apparatus for controlling the cut register in a web-fed rotary press with multi-web operation.
2. Description of the Related Art
In web-fed rotary presses, it is known to use an actuating roll which can be moved in linear guides as an actuating element for the cut register control, with which roll the paper path length between two draw units is changed and therefore the register is corrected. Register rolls of this type are shown, for example, in DE 85 01 065 U1. The adjustment is generally carried out by means of an electric stepping motor. Apparatuses of this type are afflicted with a relatively high mechanical and electrical complexity, and the control is relatively slow and inaccurate.
It is an object of the invention to provide a quick and accurate method of controlling the cut register in multi-web operation.
In the method according to the invention for controlling the cut register, the running time of the web image points in a constant web path is adjusted whereas, in the prior art, a change is made in the web length at constant web speed. In the method according to the invention for controlling the web tension at the same time, the leads (speeds) of clamping points are changed, both actions occurring simultaneously and ensuring stable overall control as a result of decoupling measures. Hitherto, this was not possible in the prior art.
It is significant that it is now possible to control cut register errors and web tensions in the same or in different sections of the press simultaneously and independently of one another, this being possible in particular even in the case of the individual part webs within the turner superstructure.
The solution according to the invention requires no additional mechanical web guide element in the form of an actuating roll. For the purpose of cut register correction, existing, non-printing draw units are used, such as the cooling unit, pull rolls in the folder superstructure, the former roll or further draw units located in the web course between the last printing unit and knife cylinder, which are preferably driven by means of individual variable-speed drives. The parameters entering the cut register control section are largely independent of the properties of the rotary press. Furthermore, the cut register accuracy and the control speed (on-control and off-control time) can be increased substantially by the new method, whereby the number of waste copies is considerably reduced.
It is significant that, to control the cut register Y18 (cf. FIG. 2 to 9) in multi-web operation, specific image information or measuring marks from printed webs are registered by means of sensors and are supplied to a control device. An item of image information or measuring marks from at least one of the webs, the information or marks being suitable for the deviation of the position of the printed image with respect to its intended position, based on the location and time of the cut, i.e. for the cut register error, is measured before or on the common knife cylinder with the aid of at least one sensor and is available for the control of the total register error of all the webs. The actual value used for the control of the total cut register error of all the webs is either the directly measured register error of the at least one web or, from this register error, an average for the total cut register error of all the webs being calculated or estimated. To correct the total register error of all the webs, either the speed of at least one clamping point located before the knife cylinder and/or the position of the knife cylinder is changed, so that the total register error of all the webs is corrected to the predefined set point in accordance with the actual value.
To calculate or estimate the actual value needed for the control of the total register error of all the webs, either at least one mathematical model and/or measured and stored data are used, the mathematical models being implemented in a computing and/or control device as filters, observers, etc. and/or as curves, tables and characteristics in the form of algorithms and/or data. It is significant that the method can be applied both in part-width and full-width webs or a combination of part-width and full-width webs, in particular of web bundles.
It should be emphasized that at least one web tension Fk-1,k to be controlled of at least one of the webs is measured at or before a clamping point k (Kk), the clamping point k (Kk) being located before the knife cylinder, and that this web tension Fk-1,k and at least one part register error Y1i* are set independently of each other, that is to say are decoupled in the control engineering sense, by means of suitable manipulated variables from clamping points—the manipulated variables used being circumferential speeds of non-printing clamping points and/or angular positions of printing clamping points and/or a mass flow supplied to the system, which is set by the circumferential speeds of winding devices with the aid of dancer rolls or self-aligning rolls or tension control loops—by means of control loops using appropriate set points Y1iw*, Fk-1,k,w, so that the web tension assumes its set point, which lies in a prescribed range, and the cut register error is corrected to its predefined set point. The actual value for the control of the total cut register error of all the webs is determined either from at least one web or from at least one web bundle or from all the webs.
In order to influence part register errors and the total register error with the aid of the speeds (leads) or angular positions of clamping points, control loops are provided, in particular in a cascade structure. The motors of the driven clamping points are equipped with a current control loop, an angular velocity control loop and possibly an angle control loop. In at least one of the webs, a part register Y13* error at a clamping point 3 (K3) is always controlled by a controller, to which the angular velocity control loop and, if present, the angle control loop of the clamping point 3 (K3) are subordinated (cf.
The invention also relates to an apparatus for implementing the method for controlling the cut register on a rotary press, whose clamping points K1 to K8 can be driven independently of one another by drive motors with associated current control, rotational speed control and, if appropriate, angle control, and in which the cut register Y18 and/or further part register deviations Y13*, Y1i*, Yik* associated with this can be registered before or on a knife cylinder K8 and/or before or at one or more clamping points K1 to K6, Ki, Kk arranged before this knife cylinder K8 via a specific item of image information or measuring marks of the printed webs by means of at least one sensor, the web tensions Fjk can be registered by means of at least one further sensor and these register deviations Y13*, Y1i*, Yik* and web tensions Fjk, registered by the sensors, for influencing the cut register error Y18 can be supplied to a closed-loop and/or open-loop control device for changing angular positions or circumferential speeds v1 to v8, vi, vk of the respective clamping point K1 to K8, Ki, Kk, it being possible to set the web tensions Fjk in a web section j-k and the register errors Y1i* in another or the same web section independently of one another by means of appropriate set points Fjk,w, Y1i,w*, for which purpose a man-machine interface, in particular a control desk, with appropriate visualization is provided. The unwinds (K0) can be controlled by means of dancer rolls or web tension control loops in such a way that, by means of their circumferential speeds, with the aid of dancer rolls or web tension control loops, the unsteady and steady mass flow introduced into the relevant system can be changed.
It is necessary that, at the nominal speed of the press, the sensors and associated evaluation devices make the information about the register error or errors Y18; Y13*; Y1i*; Y1k* and the web tension Fjk available in the minimum time and are designed with interfaces which transmit the register errors Y18; Y13*; Y1i*; Y1k* and the web tensions Fjk via field buses, Ethernet or other communication buses or communication interfaces.
The closed-loop and/or open-loop control devices are implemented as a central computer, preferably in the control desk, or as an embedded computer, preferably in open-loop or closed-loop control cabinets, or are implemented in functionally decentralized form in the respective converter devices, and all the information (actual values, set points, control algorithms) are processed in real time.
The invention is to be explained in more detail in the following text using some exemplary embodiments.
In multi-web operation of web-fed presses, the case occurs in which a greater or lesser number of webs, part webs (strands) or web bundles composed of these are led together and have to be cut by a common knife cylinder. It is conceivable in general for each web strand or each web bundle to be equipped with an unwind, a threading apparatus, with printing units and following transport and processing clamping points. Thus, decoupled control of the part cut register and of the web tensions in each of the webs can be carried out in a manner analogous to the method steps described in Patent Application Publication Nos. US 2005/0061189 and US 2005/0039622, which are incorporated herein by reference. The object is, then, to monitor the total cut register error of all the webs on the common knife cylinder and as far as possible to set it to the predefined value, for example equal to zero. Such general systems are present above all in newspaper presses, possibly also in illustration machines, if web bundles originating from various former systems are to be cut by a common knife cylinder in register.
First of all, a single web-fed press will be assumed, in which a full-width web upstream of a turner unit is to be cut, led onwards in the form of part webs (strands), bundled on a former roll, folded in the longitudinal direction in the former and cut by a common knife cylinder. The web bundle is characterized in that, normally, the strand located at the top upstream of the former roll surrounds the longitudinally folded webs. This will be assumed in the following text. Otherwise, the statements for the upper and lower web must be changed with the same effect. The object is to minimize the total cut register error of the web bundle. An increase in the cut register accuracy by controlling a part cut register error Y1i* of the full-width web measured before the turner unit is possible and very advantageous, but not satisfactory since the web strands are subjected to further disturbances, which lead to new register errors, on their path over deflection rods and guide rolls as far as the former roll. The web strands led together are additionally subjected to different forces as they run through the former as far as the knife cylinder, so that they experience displacement with respect to one another, which leads to different and possibly not tolerable total cut register errors. Therefore, in the event of higher accuracy requirements, additional measures for cut register correction have to be taken.
The invention will be described initially using the example of two part-width webs (strands BU, BO) guided over a folding former 7 (system 1 to 7 according to
1. Plant Diagram
The four-roll system of
In the following text, “speed” and “lead” will be used synonymously. The web force in a section i-1, i will be designated Fi-1,i. The changes in the modulus of elasticity and in the cross section of the web running in are combined in ZT.
In order to control the cut register, specific image information or measuring marks are registered by means of at least one sensor and supplied to a control device. Let the total cut register error Y18 be measurable before or on the knife cylinder on the upper, surrounding web (sensor SO, cf.
A part cut register error Y1i*, measured at the clamping point i (Ki) or between two clamping points i-1 (Ki-1*) and i (Ki), is the positional deviation of a point printed by the clamping point 1 from the measurement location in the case of non-steady-state movement at a time at which it would reach this measurement point in the event of steady-state movement. This definition is a time-continuous variable. This results specifically in the deviation of the intended cut line at the measurement location as a time-discrete variable. The total cut register error Yi is the deviation of the cut line located between two printed images from its correct position in relation to the cutting time of the clamping point n (Kn), as based on the clamping point 1 (K1).
The system of
In the following text, the numbering of the clamping point 3 (K3) as the first clamping point of the turner unit will be maintained.
It will be assumed that it is advantageous to control the register error Y13* of the full-width web before the turner unit to the prescribed set point Y13w*, for example Y13w*=0, with a register control loop superimposed on the rotational speed control loop. Therefore, the register error which has occurred before this measurement point is eliminated. All further measures build on this structure.
2. Systems Having a Folding Former
The cut register error is measured immediately before the knife cylinder 8 and is corrected by the angular position of the knife cylinder 8. It should be possible to determine the error Y18o of the upper web. For this purpose, the register error Y18o is measured shortly before or on the knife cylinder 8 with the aid of the sensor SO, supplied via the block 8.5 to the comparison point of a cut register controller 8.1 and compared with a predefined set point Y18wm, for example Y18wm=0. The register controller prescribes a position set point α8w for the angle controller 8.2. The rotational speed control loop (controller 8.3) and current control loop (not illustrated) are subordinated to this. The numerical differentiator D forms the actual value of the angular velocity ω8 from the actual angle value α8. In the case of this design, control is carried out either of the total cut register error Y18o or of the average Y18m, which is calculated in block 8.5 (average former). By forming an average, which is predominantly based on empirical results, the different register positions of the web strands are taken into account in the case of multi-web operation.
If a cut register error occurs, for example in the event of a reel change, the register error Y18o or Y18m is compensated for in accordance with the dynamics of the subordinate angle control loop. Because of the measurement located immediately before the knife cylinder, the run times are minimal. Extremely short control times can be achieved with the individual drive of the knife cylinder 8.
The possibility is provided of adding a corrective movement of the clamping point 3 (K3), that is to say the associated change in the angular velocity ω3w, to the angular velocity set point ω6w. This measure is used for the preliminary control of the clamping point 6 (K6) in order to eliminate, partly or wholly, the web time constant between clamping points 3 (K3) and 6 (K6). A filter F6.3 takes into account empirically obtained modifications of the preliminary control, which, for example, can be caused by sliding slippage of the clamping point 6 (K6).
If only the errors Y16o* and Y16u* before the former roll 6 can be measured, that is to say not on the knife cylinder 8, then, in the case of two-web operation, control is carried out to the mean Y16m*=(Y16u*+Y16o*)/2 of these two errors or, in the case of multi-web operation, to an empirically determined mean Y16m*, from which, if appropriate, an estimated error Y18m can also be determined, which can serve as an equivalent value for the error Y18m.
The actuating roll 5 is used for presetting the cut register Y18u* of the lower web BU. There is no possibility of influencing the upper and lower web separately through the angular position of the knife cylinder alone, since only a single drive is available for the correction. For this purpose, the actuating roll 5 would additionally have to be equipped with a high-performance, dynamically quick and position-controlled servo drive.
The knife cylinder has only angle control. To control the cut register, the clamping point 3 (K3) with its drive already present is used. The register Y18o or Y18m is superimposed on the register control loop for Y13*. If the register errors can be measured only before the clamping point 6 (K6), then control is carried out to the average Y16m*=(Y16u*+Y16o*)/2 of these two errors or, in the case of multi-web operation, to an empirically determined average Y16m*, from which, is appropriate, an estimated error Y18m can also be determined, which can be used as an equivalent value for the error Y18m.
In the case of an incoming disturbance, for example in the event of a reel change, the subordinated register control loop for Y13* (controller 3.2) performs a fast pre-correction, while the register error for Y18o or Y18m (controller 3.1) tracks the set point Y13,w* in accordance with the register error Y18o measured on the knife cylinder 8, so that the prescribed set point Y18,wm, for example Y18,wm=0, is reached. The error Y16m* can also occur instead of Y18o.
The possibility is provided of adding a corrective movement of the clamping point 3 (K3), that is to say the associated change in the angular velocity ω3w, to the angular velocity set point ω6w. This measure is used for the preliminary control of the clamping point 6 (K6) in order to eliminate, partly or wholly, the web time constant between clamping points 3 (K3) and 6 (K6). A filter Fi6.3 takes into account empirically obtained modifications of the preliminary control, which, for example, can be caused by sliding slippage of the clamping point 6 (K6).
This method is combined with the slow readjustment of the angular position of the printing units described in Patent Application Publication No. US 2005/0034578, in order to avoid excessively large leads, or with the combined tension-register control as disclosed in Patent Application Publication Nos. US 2005/0061189 or US 2005/0039622.
The register error Y18o of the upper web BO is measured immediately before the knife cylinder 8 and is supplied to a cut register controller 6b.2, whose manipulated variable is the angular velocity ω6b,w of the former roll 6b (
In the case of an incoming disturbance, for example in the event of a reel change, the subordinated register control loop for Y13* (controller 3.2) performs a fast pre-correction of the full-width web, and the register controller for Y18o (controller 6a.2) corrects both the webs in accordance with the set point Y18wo. The register controller for Y16d* (controller 6.a2) controls out the difference Y16d*=Y16o*−Y16u* between upper web BO and lower web BU to the set value Y16d*=const in particular to the value Y16d*=0.
Instead of the speed (lead) of the additional clamping point 6a (K6a), the position of an actuating roll 5a can also occur. For this purpose the latter would have to be equipped with a high-performance, dynamically quick and position-controlled servo drive.
In this solution, the cut register Y18o of the upper web and Y16u of the lower web can be influenced. The clamping point 6a (K6a) is designed either with a full-width pressing roll or with trolleys and additional wrap, which means that this is a complete and almost slip-free clamping point. In the case of the former roll 6b, the clamping is carried out with trolleys, because of the plurality of webs to be transported. The force difference which can be transmitted is therefore restricted and is affected by slippage, above all in the event of fast lead changes.
It is pointed out that, by using the clamping point 6b (K6b), instead of Y18o*, Y16d* can also be controlled, and, by using the clamping point 6a (K6a), instead of Y16d*, Y18o can also be controlled, that is to say the assignment of clamping points and controlled variables can be interchanged.
The possibility is provided of adding a corrective movement of the clamping point 3 (K3), that is to say the associated change in the angular velocity ω3w, to the angular velocity set points ω6,aw and ω6,bw, it being necessary for adaptation filters Fi6a and Fi6b to be used. They are used firstly as symmetry filters, as described in Patent Application Publication No. US 2005/0061189, and may permit empirically obtained modifications of the preliminary control. This measure is used for the preliminary control of the clamping point 6a (K6a) and 6b (K6b) in order to eliminate, partly or wholly, the web time constant between clamping points 3 (K3) and 6 (K6a,b).
If it is not possible to measure the register error of the upper web BO directly before the knife cylinder 8, they are measured before the former roll and Y16o occurs at this point.
This method is combined with the slow readjustment of the angular position of the printing units, described in Patent Application Publication No. US 2005/0034578, in order to avoid excessively large leads, or with the combined tension-register control in accordance with Patent Application Publication Nos. US 2005/0061189 or US 2005/0039622.
In this system, it is not the former roll but the clamping point 3 (K3) which performs the correction to the cut register error Y18o of the surrounding upper web.
In the case of an incoming disturbance, for example in the event of a reel change, the controller 3.2 for the register error Y13* performs a fast pre-correction of the full-width web. With the aid of a superimposed control loop (controller 3.1), this set point is tracked in accordance with Y18wo=const, in particular Y18wo=0 and therefore the upper web BO is set to the correct cut register while at the same time influencing the lower web BU. Using the additional clamping point 6a (K6a), the register difference Y16d*=Y16o*−Y16u* between upper web BO and lower web BU is readjusted in accordance with the difference set point Y16wd=const, in particular Y16wd=0 by the controller 6a.2. In this case, the part cut register errors are measured before the clamping points 6a and 6b (K6a and K6b). However, the difference Y18d*=Y18o−Y16u* can also be formed and this can be controlled. The most beneficial solution must be determined empirically.
In this solution, two complete clamping points are advantageously used, since the former roll lead, with its force transmission affected by slippage, is no longer a manipulated variable.
The possibility is provided of adding a corrective movement of the clamping point 3 (K3), that is to say the associated change in the angular velocity ω3w, to the angular velocity set points ω6a,w and ω6b,w, it being necessary for adaptation filters Fi6a and Fi6b to be used. They are used firstly as symmetry filters, as described in Patent Application Publication No. US 2005/0061189, and may permit empirically obtained modifications of the preliminary control. This measure is used for the preliminary control of the clamping points 6a (K6a) and 6b (K6b) in order to eliminate, partly or wholly, the web time constant between clamping points 3 (K3) and 6 (K6a,b).
Instead of the speed (lead) of the additional clamping point 6a (K6a), the position of an actuating roll 5a can occur. For this purpose, the latter would have to be equipped with a high-performance, dynamically quick and position-controlled servo drive. An actuating roll 5b is rendered superfluous.
This method is combined with the slow readjustment of the angular position of the printing units, described in Patent Application Publication No. US 2005/0034578, in order to avoid excessively large leads, or with the combined tension-register control in accordance with Patent Application Publication Nos. US 2005/0061189 or US 2005/0039622.
For the lower web BU and the upper web BO, a clamping point 6a and 6b (K6b) is provided in each case, by means of which the register errors Y16u* and Y16o* can be corrected separately from each other (
The clamping points 6a (K6a) and 6b (K6b) are advantageously designed either with full-width pressing rolls or with trolleys and additional wrap, which means that these become complete and almost slip-free clamping points. b8
The possibility is provided of adding a corrective movement of the clamping point 3 (K3), that is to say the associated change in the angular velocity ω3w, to the angular velocity set points ω6a,w and ω6b,w, it being necessary for adaptation filters Fi6a and Fi6b to be used. They are used firstly as symmetry filters, as described in Patent Application Publication No. US 2005/0061189, and may permit empirically obtained modifications of the preliminary control. This measure is used for the preliminary control of the clamping point 6a (K6a) and 6b (K6b) in order to eliminate, partly or wholly, the web time constant between clamping points 3 (K3) and 6 (K6a,b).
This method is combined with the slow readjustment of the angular position of the printing units, described in Patent Application Publication No. US 2005/0034578, in order to avoid excessively large leads, or with the combined tension-register control in accordance with Patent Application Publication Nos. US 2005/0061189 or US 2005/0039622.
For the lower web BU and the upper web BO, a clamping point 6a (K6a) and 6b (K6b) is provided in each case, by means of which the cut register error Y18o and the cut register error difference Y16d can be corrected separately from each other (
The clamping points 6a (K6a) and 6b (K6b) are advantageously designed either with full-width pressing rolls or with trolleys and additional wrap, which means that these become complete and almost slip-free clamping points.
The possibility is provided of adding a corrective movement of the clamping point 3 (K3), that is to say the associated change in the angular velocity ω3w, to the angular velocity set points ω6a,w and ω6b,w, it being necessary for adaptation filters Fi6a and Fi6b to be used. They are used firstly as symmetry filters, as described in Patent Application Publication No. US 2005/0061189, and may permit empirically obtained modifications of the preliminary control. This measure is used for the preliminary control of the clamping points 6a (K6a) and 6b (K6b) in order to eliminate, partly or wholly, the web time constant between clamping points 3 (K3) and 6 (K6a,b).
This method is combined with the slow readjustment of the angular position of the printing units, described in Patent Application Publication No. US 2005/0034578, in order to avoid excessively large leads, or with the combined tension-register control in accordance with Patent Application Publication Nos. US 2005/0061189 or US 2005/0039622.
As compared with System 6, the complete register control loop of clamping point 6b (K6b) [controller 6b.2] for the register error Y16o* now has superimposed on it the register controller 6b.1 for the register error Y18o. The control of the difference cut register error is identical to that in system 6. In the case of an incoming disturbance, for example in the event of a reel change, the controller 3.2 for the register error Y13* performs a fast pre-correction of the full-width web. If it is possible to measure the incoming disturbance at the clamping points 6a (K6a) and 6b (K6b), then the speeds of these clamping points are corrected by the register controllers 6a.2 and 6b.2 in accordance with the set points Y16wd* and Y16wo*. If, finally, the disturbance which has run in can be measured at the sensor SO on the knife cylinder 8, then the set point Y16wo* is tracked in accordance with the set point Y18wo.
As compared with System 5, the register error arising between the turner superstructure and knife cylinder 8 is additionally corrected. As compared with System 6, all the errors arising within the turner superstructure are substantially controlled out by the subordinated loops (controllers 6a.2 and 6b.2). The superimposed controller 6b.1 is relieved of load as a result. This system has advantages in the case of particularly long paths between turner superstructure (first clamping point 3 (K3) of the turner device 4 as far as the former roll 6c and knife cylinder 8.
For the decoupled predefinition of the tensions (F34,a) and/or (F34,b) in the lower web (BU) and/or upper web (BO) in the web sections 3-4a and/or 3-4b—but not in the sections 4a-6a and 4b-6b because of the self-compensation property—the controlled clamping points 4a (K4a) and 4b (K4b) are provided. Tension control loops are superimposed on the rotational speed control loops (controllers 4a.3 and/or 4b.3). They process the difference between the actual tension value (sensor SFU and/or SFO) and the tension set point (F34a,w and/or F34,b,w).
The clamping points 4a (K4a) and 4b (K4b) and 6a (K6a) and 6b (K6b) are designed either with full-width pressing rolls or with trolleys and additional wrap, which means that these become complete and almost slip-free clamping points.
This method is combined with the slow readjustment of the angular position of the printing units, described in Patent Application Publication No. US 2005/0034578, in order to avoid excessively large leads, or with the combined tension-register control in accordance with Patent Application Publication Nos. US 2005/0061189 or US 2005/0039622, which relates to the web sections located before the clamping point 3 (K3).
3. Systems With a Plurality of Folding Formers
It will now be assumed that a plurality of web bundles from different folding folders are supplied to the common knife cylinder clamping point 8 (K8), as
As in the method according to System 2, leads are advantageously to be used as manipulated variables. Since the range of manipulation of the lead changes is limited because of the associated force changes, an initial state must first be produced, so that Y18dB≈Y18wdB=0. For this purpose, the clamping points 1L (K1L) and 1R (K1R), that is to say the printing units of the machine L and of the machine R, have to be synchronized appropriately in terms of their angular position by the two electronic shafts being coupled to each other. For instance, the shaft L can be the guide shaft for shaft R. Additional angle set points (e.g. α8w,z in
The cut register errors of the web bundles are registered directly before the knife cylinder 8 by the sensors SL and SR, which supply the actual values Y18L and Y18R. From these, the difference Y18dB=Y18L−Y18R is also formed and supplied to the controller 3.1R, which controls this difference to the set point Y18wdB=0.
If a disturbance then occurs in one of the systems, for example a reel change, then an error Y18dB≠Y18wdB is caused, which is to be controlled out.
If this disturbance occurs in the machine L, then the subordinate register control loop for Y13L* (controller 3.2L) performs a rapid pre-correction and the controller 3.1L controls the disturbance to Y18w=const, in particular to the value Y18w=0. The difference y18db arising during this compensating procedure is simultaneously led back to to the value Y18wdb=0 by the controller 3.1R, that is to say the cut register of the machine R is tracked to the machine L.
In the event of an incoming disturbance in the machine R, the subordinate register control loop for Y13L* (controller 3.2R) performs a rapid pre-correction, while the register controller 3.1R leads the difference Y18db produced back to the value Y18wdb=0. In theory, the cut register error Y18L is not affected as a result. Should this nevertheless be the case because of a certain mechanical coupling of the two bundles, then the cut register error Y18L is simultaneously controlled out by the controller 3.1L.
The clamping points 6L (K6L) and 6R (K6R)or other clamping points which, as a result of their leads, act on the full-width web or on the entire bundle, can also occur instead of the clamping points 3L (K3L) and 3R (K3R).
| Number | Date | Country | Kind |
|---|---|---|---|
| 103 35 886 | Aug 2003 | DE | national |
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/EP2004/008751 | 8/4/2004 | WO | 00 | 3/2/2006 |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2005/016806 | 2/24/2005 | WO | A |
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