Abstract:
The invention relates to an apparatus for producing products and a method of controlling such an apparatus, having a programmable logic controller—PLC—an axis control system, for controlling axes, and a visualization system for displaying processes and/or process parameters. In known apparatus of this type, the PLC, the axis control system and the visualization system are implemented in physically self-contained appliances. Linking these components requires a great deal of effort both during construction and during operation of the apparatus. The data interchange between the components requires an “overhead” in order to ensure the communication between the components. This is disadvantageous. The invention therefore seeks to improve such manufacturing apparatus and control methods in that the PLC, the axis control system and the visualization system run on a common physical appliance.

Description:
BACKGROUND OF THE INVENTION 
     The invention relates to a method of controlling an apparatus for producing products, in particular cigarettes, cigarette packs, plasters or plaster packs, having a programmable logic controller—PLC—, an axis control system for controlling axes, in particular of drives, servo motors, conveying and/or cutting elements, and a visualization system for displaying processes and/or process parameters. The invention also relates to such an apparatus. 
     Production machines are known, for example machines for producing cigarettes or cigarette packs having a plurality of individually controllable drives or servo motors. Machines of this type regularly have a dedicated programmable logic control unit, by means of which these drives or their axes are driven. Furthermore, machines of this type have control units for axis control and a unit for visualizing processes or process parameters, this visualization unit being used as an interface between machine and operator, that is to say that the visualization unit also assists the operation of the machine. 
     In these conventional machines, the three aforementioned units, namely the programmable logic control unit, the axis control unit and the visualization unit, are implemented in physically self-contained appliances. The units regularly originate from different suppliers and are therefore not directly coordinated with one another. Although the units are linked with one another, this linking requires additional effort in the production of such machines, and also during the operation of the machines. The interchange of data is possible only by adapting the data from the various units to one another and therefore requires a certain “overhead”, that is to say additional outlay, in order to ensure the communication among these three components. In this way, the development and maintenance of such machines is made more difficult, and data processing is slowed down. 
     SUMMARY OF THE INVENTION 
     The invention is based on the object of improving such manufacturing machines and their control. 
     This object is achieved by a method of the type mentioned at the beginning by the PLC, the axis control system and the visualization system running on a common physical appliance, in particular a common hardware platform. An apparatus according to the invention of the type mentioned at the beginning is characterized in that the PLC, the axis control system and the visualization system are implemented on a common physical appliance, in particular a physical hardware platform. 
     Implementing the three components, PLC, axis control system and visualization system, on a common physical appliance means that the outlay on communication among these components is considerably simplified and reduced. Adaptation of the data from the various units is no longer necessary. This means that communication protocols between the various components can be dispensed with, which leads to a direct time gain and to faster data accesses. Furthermore, because of a more comprehensible data structure which is established, the result is a reduction of possible sources of error during the development, installation and maintenance of such machines. 
     Furthermore, an open structure of the control system is obtained, which permits a high degree of independence from the hardware used. By this means, the processes during the production of products can be coordinated quickly. By replacing the physical appliance, for example on the basis of a newly developed generation, an increase in the system performance overall is possible, and not merely an increase in the performance of individual components, which does not lead to an increase in the overall system performance. 
     In the present connection, the term “product” is to be understood in the widest sense. It includes both the finished and the unfinished product, in particular including pre-products. The products in this sense pass through various processes, in particular along one or more conveying paths. Both the conveying speed and the processing speed within the individual processes are regularly very high in machines of this type. Exact co-ordination of the processes is therefore necessary if high product quality is to be achieved. The invention permits this exact and permanent co-ordination, even at high speeds. 
     This is because the increase in the data processing speed achieved by the integration according to the invention of the PLC, axis control system and visualization system in a common physical appliance, permits the individual servo drives to be co-ordinated with one another in a permanently regulated manner. To this end, use is made of sensors which monitor the products continuously, the drive axes being regulated on the basis of signals from these sensors. Manual monitoring, as n known machines, can therefore be dispensed with. Likewise, manual resetting of the servo drives can be dispensed with, since it is now carried out automatically with the effect of regulation. 
     A self-contained special feature consists in interrupting a treatment process, in particular spraying or gluing, of a material web or a product if a sensor indicates a planned and/or unplanned fault in the material web or the product. An interruption of this type is made deliberately only while the fault is being conveyed past a treatment element, in particular its nozzle, and not for the time taken to convey a complete product past. This achieves the situation where neither conveying elements are inadvertently glued or sprayed, which would lead to disadvantageous soiling of the machine, nor are individual material layers separated as a result of faulty gluing, which can lead to machine damage. 
     A further self-contained special feature is the deliberate ejection or deliberate separation of individual faulty products. As soon as a product has been detected as faulty by a sensor, this product is tracked from the sensor position to the separating element and then separated out individually and deliberately by the separating element. In the case of conventional machines, it is merely possible to separate out a relatively large number of products, containing a single faulty product, since products cannot be tracked individually because of too low a data processing speed. 
     The above special features, specifically controlling the drive on the basis of product monitoring, interrupting gluing only For the time taken to convey a fault past, and the deliberate separation of faulty products, are time-critical processes which, as a result of the high processing speeds, can be implemented only with fast data processing. The integration according to the invention of the PLC, axis control system and visualization system on a common physical appliance is the basis of fast data processing and therefore for these special features. 
    
    
     BRIEF DESCRIPTION OF THE DRAWING 
     Further special features and details of the invention will be explained in more detail below using an exemplary embodiment illustrated in the drawing, in which: 
     FIG. 1 shows a block diagram of some components of a machine control system; 
     FIG. 2 shows a schematic illustration of a production machine and conveying paths for the product, namely plasters; 
     FIG. 3 shows a finished plaster in cross section; 
     FIG. 4 shows a finished plaster in longitudinal section along the line IV—IV from FIG.  3   
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     FIG. 1 illustrates the control system of a product production machine. A common physical appliance  10 , illustrated as a block, forms a common-platform for a PLC, an axis control system and a visualization system. The physical appliance is, in particular, a personal computer IPC to the industrial standard. An industrial PC of this type has the advantage of being inexpensive and being continuously developed further. In addition, a series of development tools are available. Both the operation and any possibly necessary adaptation of this control concept can therefore be implemented simply and cost-effectively. 
     A visualization module  11  is used to provide an interface between the machine and an operator. The visualization module  11  displays, inter alia, processes and process parameters. At the same time, it also permits the input of changes to the processes or process parameters, for example via a touch-screen monitor or a screen-keyboard system. The visualization module  11  also has a so-called OPC (OLE for Process Control) interface, that is to say an interface for process control in accordance with the OLE (Object linking and embedding) standard. The visualization module  11  communicates with a soft PLC module  12 , as it is known, which provides a common database  13  for a first PLC task  14  for controlling time-critical processes, a second PLC task  15  for controlling non-time-critical processes and an NC (numerical control) task  16  for controlling axes, in particular of drives, servo motors, conveying and/or cutting elements. 
     The first PLC task  14  carries out time-critical processes, such as monitoring individual procedures in the product production or treatment, for example gluing and/or spraying individual material layers. Furthermore, this PLC task  14  also carries out the correction of the position and cut lengths of the material. To this end, the PLC task  14  integrates a position of an encoder  17  at a clock rate of 100 μs or faster and therefore interrogates, for example, the position of a master axis as well as the states of specific inputs and outputs and evaluates these in a program. If a position or length deviation, for example from a set point or set-point range, is detected, a correction is requested of the NC task  16 . 
     The NC task  16  administers the driving of axes of servo drives, in particular in the form of start, stop and positioning signals, and also a coupling to the master axis and error evaluation. It is preferable for some or all of the rotary axes to be coupled to the master axis M 1  (see FIG.  2 ), in order to ensure the mutual synchronism of the axes. The positions or speeds of the axes are automatically corrected upon receipt of a request from the first PLC task  14 . 
     The second PLC task  15  carries out further PLC tasks which are not time-critical. These include, for example, controlling specific valves, interrogating door contact switches, switching lamps on and off and/or monitoring a sensor which indicates any possible strip breakage. Tasks of this type do not necessarily have to be carried out at the rapid clock rate of the first PLC task  14 , that is to say every 100 μs. These tasks can also be carried out at greater time intervals, for example only every 2-4 ms or only every second. 
     The components of the soft PLC  12 , namely the common database  13 , first PLC task  14 , second PLC task  15  and NC task  16 , are implemented as software on the common physical appliance  10  or the IPC. In particular, the first PLC task  14 , the second PLC task  15  and the NC task  16  are set up in a uniform programming language, for example IEC1131-3, that is to say in a standardized programming language (standard of the International Electrotechnical Commission). The use of such standard programming language permits the elimination of additional data protocol layers, and therefore reduces the effort on data processing. This achieves a further increase in speed. 
     At the software level, the first PLC task  14  is connected to a hardware driver  13  for a fast optical fibre interface  19 . The fast optical fibre interface  19  creates a connection for a fast optical bus system, which has a plurality of optical fibres  20 ,  21  and  22 . A first optical fibre  20  connects the fast optical fibre interface  19  to the encoder  17  which determines the position of the master axis M 1  and puts it on the bus. A further optical fibre  21  connects the encoder  17  to a fast input/output subassembly  23 . This subassembly  23  is preferably constructed as a binary subassembly. It has, in particular, a data width of 32 bits and is therefore able to address  32  input or output signals. The input signals used are, in particular, the signals from sensors, for example light barriers LS 1 , LS 2  and LS 3 . These input signals are likewise preferably binary signals, which indicate the presence or absence of a specific state. As an output signal, the subassembly  23  likewise transmits a binary signal, which is carried to a treatment unit, for example a glue nozzle  24 , and communicates to this glue nozzle whether it is to be opened or closed. The connection between the subassembly  23  and the light barriers LS 1 , LS 2  and LS 3  and the glue nozzle  24  is made, in particular, via electrical or optical lines  25  to  28 . 
     The special feature of the above-described optical bus system is the small number of users on the bus. This is because this bus system has substantially only two users, namely the encoder  17  and the fast, binary input/output subassembly  23 . Because of this small number of users, the bus system can be operated with only two telegrams. This avoids additional data to be transmitted on the bus, which increases the data processing speed. 
     The interplay of the specifically adapted hardware driver  18 , the fast optical fibre interface  19  and the optical bus system having optical fibres  20 ,  21  and  22  and only two users, namely the encoder  17  and input/output subassembly  23 , provides a bus system which operates very quickly and can be interrogated or operated at a clock rate of 100 μs or faster. The fast optical fibre interface  19  and the associated hardware driver  18  are distinguished by the fact that they do not have their own memory, nor their own processor. Instead, access is specifically made to the very powerful processor and the large memory of the industrial PC or of the common physical appliance  10 , which has the effect of increasing the speed. 
     However, the control system illustrated in FIG. 1 additionally has a second bus system; to be specific, the second PLC task  15  and the NC task  16  communicate with this second bus system via a standard optical fibre interface  29 , as it is known. Differing from the fast optical fibre interface  19  with its hardware driver  18 , the standard optical fibre interface has its own processor with corresponding memory. This standard optical fibre interface  29  is able to manage the communication between the second PLC task  15  and the NC task  16  and the second bus system autonomously, and therefore releases computing power and system resources belonging to the common physical appliance  10  or the industrial PC. The standard optical fibre interface  29  constitutes the interface with the second bus system, which likewise has optical fibres and optical lines  30 ,  31  and  32 . The optical fibre  30  connects the standard optical fibre interface  29  to a standard input/output a subassembly  33 , as at is known, for transmitting digital or analogue data to further bus users. In particular, the optical fibre  31  produces a connection between the standard input/output subassembly  33  and a plurality of servo modules combined in a block  34  and having intelligent bus users. The block  34  is connected to the standard optical fibre interface  29  via an optical fibre  32 . The individual servo-modules of the block  34  are in turn connected to servo motors  39 ,  40 ,  41  and  42  via electrical connecting lines  35 ,  36 ,  37  and  38 . The electrical connecting lines  35  to  38  are used both for the power supply and also for the transmission of control signals. 
     The second bus system, formed from the standard optical fibre interface  29 , the standard input/output subassembly  33  and the block  34  of servo modules and the optical fibres  30  to  32 , is slower than the first bus system and is used to process non-time-critical processes. It is therefore sufficient to update the data transmitted via this bus system every 2 to 4 ms 
     FIG. 2 shows a machine for producing plasters or other products containing a cellulose section. Along a first conveying path  43 , a cellulose pre-product  44  is fed to a calendering unit  45 , which has a roll stand with a plurality of rolls, between which the cellulose pre-product  44  is led under high pressure. This produces a cellulose web  46 , which is cut to size in individual cellulose sections  48  by a cutting element  47 , namely a knife roll. These cellulose sections  48  are used to absorb liquids, in particular blood, in the finished product. By means of a conveying device  49  with a conveyor belt  50  driven by a drive roll  51 , the said sections are conveyed in the direction of a treatment unit  52  for spraying the cellulose sections  48  with an antiseptic agent. In the area of the conveying device  49 , a sensor, specifically a light barrier LS 1 , checks to see whether there is a cellulose section  48  in the area of the light barrier LS 1 . If this is so, after a defined time interval, a spray nozzle  53  belonging to the treatment unit  52  receives a signal to spray the cellulose section  48  then located in the area of the spray nozzle  53  with an antiseptic agent. 
     In an end area  54  of the conveying device  49 , the cellulose sections  48  are transferred to the treatment unit  52 . The treatment unit  52  has a “vacuum belt”  55  and a vacuum unit  56 . The vacuum belt  55  is constructed as an air-permeable suction belt, so that as a consequence of the vacuum produced in the interior of the vacuum belt  55  by the vacuum unit  56 , cellulose sections  49  remain adhering to the belt. In addition, the vacuum unit  56  has a plurality of rolls for guiding the vacuum belt  55 , of which rolls at least one is constructed as a drive roll  57 . 
     The spray nozzle  53  is controlled, via an output from the fast input/output subassembly  23  (according to FIG.  1 ), on the basis of a signal generated by the sensor LS 1 . In particular, it sprays no antiseptic agent in the direction of the vacuum belt  55  when there is no cellulose section  48  present, in order not to soil the vacuum belt. However, the spray nozzle  53  does not spray either when, within a cellulose section  48 , a fault, that is to say for example a hole, has been detected by the sensor LS 1 , in order not to soil the vacuum belt  55  then either. On account of the high conveying speeds, in particular of the cellulose sections  48 , the spray nozzle is designed in such a way that the spraying operation can be interrupted very quickly. 
     A base element  59 , for example a fabric or textile layer, is conveyed along a second conveying path  58 . This base element  59  forms the outermost layer in the case of a plaster stuck onto the skin. This base element is glued with spray glue by a spray nozzle  60  in a strip-like manner with a number of strips running in parallel or over an area, in particular over the entire area. However, other gluing elements can also be provided, in addition to a spray nozzle. The glued base element is conveyed past a roll belonging to the treatment unit  52 , in particular the drive roll  57 , in such a way that a cellulose section  48  is gripped by the glued base element  59  and is carried along because of the gluing. The distance between the base element  59  and vacuum belt  55  in the area of the drive roll  57  is, however, advantageously selected in such a way that the glued base element does not come into contact with the vacuum belt  55 . 
     The glued base element with cellulose sections  48  sticking to it passes over a deflection roll  61  into the area of a feed unit  62  for feeding a further material layer, namely a gauze layer  63 . The gauze layer  63  is transported in the direction of the feed unit  62  over a third conveying path  64  and, by means of a further cutting element  65 , is cut into gauze sections  66 , which are such a size that they cover the cellulose sections  48  on the base element  59 . For this purpose, the gauze sections  66  from the feed unit  62  are likewise combined with the glued base element  59  by means of a vacuum belt  67  which has a further vacuum unit  68  on its inner side and is driven by a drive roll  69 , the combination being such that a cellulose section  48  comes to lie between the gauze section  66  and base element  59 . 
     The presence of a cellulose section  48  and of a gauze section  66  is checked by a further sensor LS 2 . This sensor LS 2  is, for example, a light barrier or a light curtain operating with laser light. The light intensity emitted by the sensor is sufficient to transilluminate the base element  59 , cellulose section  48  and gauze section  66 , and to be able to receive the respective light intensity on a receiver  70  belonging to the sensor LS 2 . 
     The sensor LS 2  is likewise a high-speed sensor, which is connected to the control system via the fast input/output subassembly  23  of the first bus system. It operates so quickly that the detection of a position of the individual layers of the plaster to be produced can be registered with an accuracy of 0.5 mm even at a conveying speed of 5 meters per second. By this means even slight deviations between the relative positions of the individual layers of the product can be detected and, by means of the control system, the speed of the individual drive axes can be regulated in such a way that any deviations are again reduced or compensated for in subsequent products. 
     After passing a further deflection roll  71 , the base element  59 , now provided with cellulose sections  48  and gauze sections  63  applied over the latter passes firstly to a first protective-film application unit  72 , by means of which, via a fourth conveying path  73 , a first protective film  74  is applied, and covers somewhat more than one half of the base element  59 . A second protective-film application unit  75  applies a second protective film  76  to the remaining half of the base element, the said protective film  76  being conveyed along a fifth conveying path  77  in the direction of the base element  59 . At this point in the processing process, the product now comprises a base element  59  with cellulose section  49  applied to it, and a gauze section  66  which covers and overlaps the cellulose section  48  and is in turn covered by two mutually overlapping protective films. All the layers are bonded onto the base element  59  by the glue applied by the spray nozzle  60 . 
     Then, as viewed in the conveying direction, a further cutting element  78  divides off the base element, specifically substantially centrally between two cellulose sections  48 . In this area, the plaster sections which are then ready for use are produced, and are subjected to a final inspection by means of a further sensor LS 3 . This sensor LS 3  is equipped with a further conveyor belt  80  and a drive roll  81 , and also further deflection rolls, in the area of a conveying device  79 . This conveying device is used to transport the products which have now been separated, namely plasters. 
     If the sensor which again can be formed as light barrier or light curtain, in particular a light curtain operating with laser light, detects the product which has not been constructed properly, the control system, activates a separating device  82 , which grips a faulty product by means of suction cups  84  fitted to a roll  83  and deposits the said product on a separating belt  85 . The products separated out in this manner finally pass, via a sixth conveying path  86 , into a reject container (not illustrated). Products constructed properly pass via a seventh conveying path  87  to the subsequent packaging process. 
     The conveying speeds of the conveyor belts  50 ,  80 , vacuum belts  55 ,  67 , and also the feed speeds of the Cellulose web  46 , the gauze layer  63  and the protective films  74 ,  76  are different, in order to make it possible for the individual plaster components, fed in as pre-products, to be positioned at the correct intervals; the cellulose web  46  is conveyed at a first speed v 1 . After being separated by the cutting element  47 , the cellulose sections  48  are transported at a second speed v 2  which is higher than the first speed v 1 . 
     The treatment unit  52  conveys the cellulose sections  48  at the second speed v 2  as well, at which the base element  49  is also moved forward. The gauze sections  66  to be applied likewise arrive at the cutting element  65  at the lower, first speed v 1 . However, after being separated, they are applied to the base element  59  and the cellulose sections  48  at the higher, second speed v 2 . The protective films arrive on the gauze sections and the base element  59  at the second, higher speed in each case. After being separated by means of the cutting element  78 , the finished plasters are fed along the separating unit to the further packaging process or to a reject container at a third speed v 3  which is higher than the second speed v 2 . 
     The aforementioned speeds v 1 , v 2 , v 3  must be co-ordinated exactly with one another, since otherwise the individual layers diverge. The co-ordination of the individual speeds and positions of the individual drives or their drive axes with one another is carried out by the control system described in FIG.  1 . The servo motors  39 - 42  illustrated schematically in FIG. 1 are used as drive elements for the elements illustrated in FIG. 2, in particular conveying and cutting elements, but also the calendering unit  45  and the separating device  82 . On account of the very high production speeds for such products, a large amount of data relating to measurement and control accumulates, and can be processed so as to keep in step only by means of the apparatus according to the invention and the method according to the invention. In this way, a significant increase in the product quality may be achieved. 
     One of the drive axes of the conveying elements or of the cutting elements is used as the master axis M 1 , that is to say as the reference for further axes. In FIG. 2, this is the axis of the cutting element  78 . In principle, however, substantially any desired axis can be selected as the master axis. The master axis is provided with the encoder  17 , which applies values relating to the current position of the axis. 
     FIG. 3 shows a plaster P in cross section, in particular transversely with respect to the direction of the seventh conveying path, for example. The finished plaster comprises the base element  59  with the cellulose section  48  resting on it. The cellulose section  48  is covered by the gauze section  66 , which is adhesively bonded to the base element  59  at at least two locations. The base element  59 , cellulose section  48  and the gauze section  66  are covered by the protective layers  74 ,  76 , which can be pulled off laterally in order to stick the plaster P onto the skin. 
     FIG. 4 shows the plaster P from FIG. 3 in longitudinal section, in particular in the direction of the seventh conveying path according to FIG.  2 . As viewed in the longitudinal direction of the plaster, FIG. 4 shows that the gauze section  66  completely covers the cellulose section  46 . This ensures that the gauze section  66  is fixed to the base element  59  at the two end regions of the gauze section  66 . 
     A special feature which is not illustrated consists in providing the products, in particular the unfinished products during the production process, preferably the cellulose sections  43 , the base element  59 , the gauze sections  66  and/or the protective films  74 ,  76 , with marks which are visible or invisible under daylight, in order to be able to detect the positions of the aforementioned parts of the product better by means of the sensor. For example, an ink which is visible only under UV light could be applied, which makes the detection of a position by means of light barriers easier. 
     The cutting elements  47 ,  65 ,  78  explained can be constructed with one or more revolving knives. Alternatively or additionally, however, there is also the possibility that these cutting elements sever the respective material with a highly focused water jet. This is advantageous, in particular, in the case of cutting the cellulose web  46 , in order to limit the development of dust which is established. 
     Further advantages of the invention reside in the fact that, on account of the comprehensible data structure achieved by the integration of the PLC,-control system and visualisation system, fully automatic process correction and fully automatic format changes are possible. By this means, the effort on maintenance for such a production machine can also be minimised. Because of the open control-system structure which can be achieved, a high level of independence of the hardware, as well as rapid adaptability and an increase in the system performance together with the development of the industrial PC are also possible. 
     
       
         
               
             
               
               
               
             
           
               
                   
               
               
                 List of reference symbols: 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                   
                 10 
                 common physical 
               
               
                   
                   
                 appliance 
               
               
                   
                 11 
                 visualization module 
               
               
                   
                 12 
                 soft-PLC module 
               
               
                   
                 13 
                 database 
               
               
                   
                 14 
                 first PLC task 
               
               
                   
                 15 
                 second PLC task 
               
               
                   
                 16 
                 NC task 
               
               
                   
                 17 
                 encoder 
               
               
                   
                 18 
                 hardware driver 
               
               
                   
                 19 
                 fast optical fibre 
               
               
                   
                   
                 interface 
               
               
                   
                 20 
                 optical fibre 
               
               
                   
                 21 
                 optical fibre 
               
               
                   
                 22 
                 optical fibre 
               
               
                   
                 23 
                 fast input/output 
               
               
                   
                   
                 subassembly 
               
               
                   
                 24 
                 glue nozzle 
               
               
                   
                 25 
                 electrical line 
               
               
                   
                 26 
                 electrical line 
               
               
                   
                 27 
                 electrical line 
               
               
                   
                 28 
                 electrical line 
               
               
                   
                 29 
                 standard optical fibre 
               
               
                   
                   
                 interface 
               
               
                   
                 30 
                 optical fibre 
               
               
                   
                 31 
                 optical fibre 
               
               
                   
                 32 
                 optical fibre 
               
               
                   
                 33 
                 standard input/output 
               
               
                   
                   
                 subassembly 
               
               
                   
                 34 
                 block of serve modules 
               
               
                   
                 35 
                 electrical connecting 
               
               
                   
                   
                 line 
               
               
                   
                 36 
                 electrical connecting 
               
               
                   
                   
                 line 
               
               
                   
                 37 
                 electrical connecting 
               
               
                   
                   
                 line 
               
               
                   
                 38 
                 electrical connecting line 
               
               
                   
                 39 
                 servo motor 
               
               
                   
                 40 
                 servo motor 
               
               
                   
                 41 
                 servo motor 
               
               
                   
                 42 
                 servo motor 
               
               
                   
                 43 
                 first conveying path 
               
               
                   
                 44 
                 cellulose pre-product 
               
               
                   
                 45 
                 calendering unit 
               
               
                   
                 46 
                 cellulose web 
               
               
                   
                 47 
                 cutting element 
               
               
                   
                 48 
                 cellulose section 
               
               
                   
                 49 
                 conveying device 
               
               
                   
                 50 
                 conveyor belt 
               
               
                   
                 51 
                 drive roll 
               
               
                   
                 52 
                 treatment unit 
               
               
                   
                 53 
                 spray nozzle 
               
               
                   
                 54 
                 end area 
               
               
                   
                 55 
                 vacuum belt 
               
               
                   
                 56 
                 vacuum unit 
               
               
                   
                 57 
                 drive roll 
               
               
                   
                 58 
                 second conveying path 
               
               
                   
                 59 
                 base element 
               
               
                   
                 60 
                 spray nozzle 
               
               
                   
                 61 
                 deflection roll 
               
               
                   
                 62 
                 feed unit 
               
               
                   
                 63 
                 gauze layer 
               
               
                   
                 64 
                 third conveying path 
               
               
                   
                 65 
                 cutting element 
               
               
                   
                 66 
                 gauze section 
               
               
                   
                 67 
                 vacuum belt 
               
               
                   
                 68 
                 vacuum unit 
               
               
                   
                 69 
                 drive roll 
               
               
                   
                 70 
                 receiver 
               
               
                   
                 71 
                 deflection roll 
               
               
                   
                 72 
                 protective-film application unit 
               
               
                   
                 73 
                 fourth conveying path 
               
               
                   
                 74 
                 first protective film 
               
               
                   
                 75 
                 protective-film application unit 
               
               
                   
                 76 
                 second protective film 
               
               
                   
                 77 
                 fifth conveying path 
               
               
                   
                 78 
                 cutting element 
               
               
                   
                 79 
                 conveying device 
               
               
                   
                 80 
                 conveyor belt 
               
               
                   
                 81 
                 drive roll 
               
               
                   
                 82 
                 separating device 
               
               
                   
                 83 
                 roll 
               
               
                   
                 84 
                 suction cup 
               
               
                   
                 85 
                 separating belt 
               
               
                   
                 86 
                 sixth conveying path 
               
               
                   
                 87 
                 seventh conveying path 
               
               
                   
                 IPC 
                 industrial PC 
               
               
                   
                 M1 
                 master axis 
               
               
                   
                 LS1 
                 light barrier 
               
               
                   
                 LS2 
                 light barrier 
               
               
                   
                 LS3 
                 light barrier 
               
               
                   
                 P 
                 plaster