EP2844478B1 - Device for setting an operating parameter of ink for a printing process of a rotary printing press and method therefor - Google Patents

Description

The invention relates to a device for adjusting at least one operating parameter of a color for a printing process of a rotary printing press, with a color system, which is a squeegee device with a squeegee chamber, contained in the color for the printing process, and a paint container from the color in the squeegee chamber is conveyed , a conveyor system that allows for promotion of color within the color system. In addition, the invention relates to a method for operating the device just mentioned.

In the EP 1 932 669 A1 a device of a rotary printing machine with a doctor device, a paint container, a conveyor system and at least one energy emission unit is described. Furthermore, a method for setting at least one operating parameter of a color for a printing process of a rotary printing press is disclosed. In the DE 195 48 535 A1 a rotary printing machine is described which has a doctor device with a doctoring chamber, which can be conveyed via feed and discharge lines in the paint doctor blade chamber or from the doctoring chamber. In this case, the device has corresponding pumps with valves that connect the doctor chamber with a paint tank. It has been found that at the beginning of a printing process as well as during the printing process of a rotary printing press, operating parameters of the ink are to be monitored or adjusted in order to ensure a high quality of the printing process. Among other things, it has been shown that the color has to maintain a defined viscosity, whereby a perfect quality is achieved during the printing process. Among other things, it has been shown that due to evaporation effects, the proportion of solvent in the paint can change, resulting in a strong viscosity influence.

From the prior art, it is known to manually remove from the paint container a color sample, based on which the viscosity of the color is determined. Unfortunately, this verification method is very time consuming.

The object of the present invention is to avoid the abovementioned disadvantages, in particular to provide an apparatus and a method for adjusting at least one operating parameter of a color for a printing process of a rotary printing press, wherein the time for setting the operating parameter can be kept as low as possible and simultaneously the design effort of the necessary equipment can be kept low.

The object of the present invention is achieved by all features of claim 1. In the dependent claims possible embodiments are described. Furthermore, the stated object is achieved by all features of the independent method claim 9. In the dependent method claims possible embodiments are described.

According to the invention, it is provided that the conveyor system is designed in such a way that the conveyor system can be switched into a setting mode and a production mode, whereby an automatic setting of the operating parameter can be carried out in the setting mode and the color is prevented from being conveyed into the doctoring chamber, and in the production mode Conveyor system promotes color in the doctoring chamber. An essential core of the invention is that in the adjustment mode the doctor chamber is not supplied with ink. Thus, it is conceivable that, for example, maintenance work on the squeegee device or on the squeegee chamber can be carried out during this setting time. At the same time, a corresponding adjustment of the operating parameter of the color takes place. This represents a considerable time savings in the setup process of the apparatus according to the invention. Thus, the arranged on the doctor blade rollers can be maintained, replaced, while at the same time for the upcoming printing process, a corresponding adjustment of or the operating parameters of the color can be done in parallel. An important operating parameter here is the viscosity of the paint. The supply of solvent and / or the change in the color temperature, the viscosity of the color can be significantly influenced. As long as the operating parameter does not have the desired value, the device according to the invention remains in its setting mode. Only when the operating parameter has reached the desired value, an automatic switching of the conveyor system in its production mode, in which color is conveyed with the desired operating parameters in the doctoring chamber, so that simultaneously the rotary printing machine can perform their printing process. It is also conceivable that the changeover from the setting mode to the production mode takes place differently than automatically. For example, it can be provided that a switchover from the setting mode to the production mode takes place manually before the actual printing process of the rotary printing press takes place.

It can be provided that the delivery system for the doctoring chamber has a main supply line and a main discharge line, wherein the delivery system has at least one pump having the main supply line or the Hauptabführleitung, and between the doctor chamber and the pump, a bypass line is arranged. Advantageously, the main supply line can have a supply pump and the main discharge line can have a return pump. In this case, the device according to the invention can have a conveyor system with a production cycle for the production mode and an adjustment circuit for the setting mode. As long as the ink is conveyed through the adjustment circuit, the production cycle for the ink is blocked or closed. The opening and closing of the two circuits mentioned can be advantageously carried out via valves, at least partially in the main supply and / or arranged in the main discharge line. During the production cycle, only one pump can be fully active, which ensures that the color is conveyed within the production cycle, in particular from the ink container to the doctoring chamber and back conveyed. Also in the adjustment mode, it may be provided that only one pump is provided or active in order to allow the ink to flow within the adjustment circuit. Alternatively, it is conceivable that both pumps, in particular the flow pump and the return pump are active, which provide in the production cycle and / or in the adjustment for a satisfactory promotion of the color from the ink container to the doctor chamber and back.

In a measure improving the invention, the bypass line can be blocked in the production mode and the bypass line can be opened in the one-part mode. Advantageously, the bypass line can have a valve in order to block the bypass line in the production mode. The invention also includes the possibility that the main supply line and the main discharge line also have valves which prevent penetration of ink into the doctoring chamber in the setting mode.

In addition, the invention may have a feed station, whereby a resource in the adjustment circuit can be introduced to adjust the operating parameters and / or to change, in particular, the operating means is a solvent. Also, the invention includes the possibility that the feed station can bring the resources in the production cycle. This means that even in the production mode a resource can be introduced into the conveyor system in order to control and influence the value of the operating parameter during the printing process of the rotary printing machine, ie online in the printing process of the rotary printing press. This means that according to the invention, at the beginning of each printing process, first the doctoring chamber is blocked from the conveying system, so that no ink can flow into the doctoring chamber. Only a transport of the color takes place within the adjustment circuit, wherein at the same time the supply station can influence the value of the operating parameter correspondingly via the addition of the operating medium. If the operating parameter of the color is set once, the conveyor system is switched to production mode in which the bypass line is blocked. In production mode, the color system now has at least one checking means which checks and / or measures the operating parameter of the color and / or determined. As the ink flows within the production loop, the feed station may cause a certain amount of equipment to be introduced into the conveyor system to maintain or not to exceed a desired value of the operating parameter for the ink.

There is the possibility that at least one verification means is integrated in the support system. It can also be provided that a plurality of checking means are arranged in or on the color system in order to check or measure or to determine the operating parameter. According to the invention, a checking agent measures and / or determines the viscosity of the ink. Furthermore, the invention comprises a checking means which determines the temperature of the ink which has within the paint system, in particular in the paint container, in the main supply, in the main discharge, in the bypass line and / or in the doctoring chamber. In addition, the invention comprises a checking means which is designed as an ultrasonic sensor in order to determine the viscosity of the ink. Likewise, a checking means may be integrated in the color system or in the conveying system, which is designed as a temperature sensor.

In addition, the device according to the invention can have a conveyor system with a color temperature control, wherein in particular the color temperature control is arranged in the main discharge line. The color temperature can be z. B. may be a heat exchanger which is arranged on the pressure side of the return pump. Advantageously, the heat exchanger is a countercurrent heat exchanger, wherein, for example, heated water is passed in countercurrent to the flow direction of the color in the main discharge. About a heat emission of water to the color a defined color temperature, which is necessary during the printing process in the rotary printing machine, in order to achieve a high quality of color printing. As a result, the viscosity of the color can be adjusted.

Furthermore, it is conceivable that the feed pump of the main supply line has a feed line to the doctoring chamber at its pressure side, this feed line being part of the main feed line which extends between the ink container and the doctoring chamber. On the suction side of the flow pump, a further supply line is provided, which connects the paint container with the flow pump. Advantageously, the supply line to the suction side of the flow pump having a valve which is connected between the flow pump and the paint tank, the supply line to the pressure side of the flow pump can also be designed with a valve which is connected between the doctor chamber and the flow pump.

In addition, it is conceivable that the main discharge line has a discharge line, which is arranged on the suction side of the return pump. Between the return pump and the doctor chamber, this discharge line may have a valve. In addition, the Hauptabführleitung may have a further discharge line on the pressure side of the return pump, wherein between the paint container and the return pump, this latter discharge line may have a valve. Thus, it is conceivable that a circuit can be provided so that paint can be pumped from the paint container through the flow pump in the doctoring chamber, which can then be conveyed back to the paint container via the return pump. This cycle represents the production cycle. This represents the normal inking process for the doctor device, in particular for the anilox roller of the rotary printing press. The valves which are provided between the doctor chamber and the two pumps, for example, may be so connected, in particular closed, that only a fluid flow through the bypass line from the flow pump in the direction of the return pump is formed. This blocking of the doctor chamber can be important, for example, when the conveyor system is in setting mode.

It may be provided that in the adjustment mode, only the return pump is active, which ensures that color is conveyed from the main supply line through the bypass line in the main discharge line in the direction of the paint container. This is intended that in a slightly leaking valve, which is located on the main supply, between the flow pump and the blade chamber, no color can penetrate into the doctor chamber. Thus, the line behind the flow pump and the bypass line, the suction side of the return pump, whereby any inflow of color is prevented by a possible leakage of the seated between the flow pump and the blade chamber valve.

Alternatively, it is conceivable that in the promotion of color in the setting mode, both the flow pump and the return pump are active, at the same time arranged between the two pumps and the blade chamber valves are closed to prevent ingress of color into the doctor chamber. The bypass line is thus opened, which allows a flow of the color from the main supply line via the bypass line in the main discharge line in the direction of the ink container and back again. Alternatively, it is also conceivable that the paint delivery flow pump is activated in the set mode to allow flow of paint through the bypass line to the deactivated recycle pump, the paint being conveyed through the main exhaust line and simultaneously through the recycle pump towards the paint container.

Furthermore, the invention comprises a method for adjusting at least one operating parameter of a color for a printing process of a rotary printing press, with a color system, which can be conveyed from the ink into the doctoring chamber, a squeegee device with a doctoring chamber, in the color for the printing process, and a color container is, a conveyor system that allows a promotion of color within the color system. According to the invention, the conveyor system is designed such that the conveyor system is switchable in a setting mode and in a production mode, wherein in the setting mode, an automatic adjustment of the operating parameter is performed and access of the ink is locked in the doctoring chamber, and in the production mode, the conveying system color in the doctoring chamber promotes.

Advantageously, the conveyor system has a production cycle for the production mode and a setting circuit for the setting mode, which are operated in particular separately from each other. It is conceivable that at least partially the production cycle corresponds to the adjustment circuit. Valves are both circuits mentioned switchable so that either the production cycle or the adjustment circuit are switched.

The operating parameter may be the viscosity of the color set in the setting mode. In production mode, the conveyor system is designed in such a way that at the same time the operating parameter is checked and / or checked. For this purpose, the color system has at least one checking means, which the Operating parameters checked in setting mode and / or in production mode. According to the invention, it is conceivable that the conveyor system has a feed station, whereby a resource is introduced into the adjustment when a setpoint of the operating parameter is not met, especially if a setpoint of the operating parameter is exceeded or exceeded. The feed station can be integrated in the conveyor system in such a way that an operating medium is introduced into the production cycle even during the production mode if a setpoint value of the operating parameter is not maintained, in particular if a nominal value of the operating parameter is undershot or exceeded. Advantageously, the location of the input of the resource is the same for both the production mode and the adjustment mode.

The invention includes that the delivery system for the doctoring chamber comprises a main supply line and a main discharge line, wherein the delivery system comprises at least one pump having the main supply line or the main discharge line, a bypass line is arranged between the doctoring chamber and the pump, in particular the operating means of Main discharge line is supplied and a thorough mixing of the resource with the color in the paint container is performed. The supply of the equipment can alternatively be done directly in the paint container. In the paint container, a corresponding mixture, for example via a mixer or a stirrer, regardless of whether the resource is supplied outside of the paint container or directly on the paint container of the color. Via the pump or pumps, the color is conveyed within the production cycle or the adjustment circuit, at the same time the checking means checking the operating parameter of the color. In general, it makes sense that the checking means is arranged on the suction side of the flow pump, that means between the flow pump and the paint container on the main supply line. It is also conceivable that the checking means is arranged on the pressure side of the flow pump.

According to the invention, the checking means measures and / or monitors the viscosity and / or the temperature of the ink, the checking means performing the measurement and / or the monitoring of the color in the setting mode and / or in the production mode. Advantageously, the device according to the invention can have a control and / or regulating unit which receives the values of the checking means and accordingly the feed station and / or the color temperature responds, if a change of the operating parameter is necessary.

In addition, it is conceivable that the conveyor system has a cleaning device which allows a cleaning solvent to flow into the conveyor system for cleaning the ink system. If the actual printing process is completed, the paint system, including the squeegee device, the squeegee chamber, conveyer system lines, pumps and the ink containers can be washed or cleaned by the cleaning solvent via a cleaning device. For this purpose, it is conceivable that the color system is connected to a storage container into which the ink can be pumped from the paint system before cleaning solvent is introduced from a solvent container in the paint system to clean this color system of the color. Subsequently, the color-contaminated cleaning solvent can be pumped into a dirt container, which is also connected to the conveyor system via lines.

• Überwindung der Thixotropie durch Vorpumpen, das bedeutet mit Hilfe der vorhandenen Pumpen innerhalb des Fördersystems
• Einstellung bzw. Änderung der Viskosität durch ein Einbringen von Lösemittel erst nach Überwindung der Thixotropie

The adjustment of the viscosity can take place, for example, in at least two steps:

• Overcoming the thixotropy by pre-pumping, that means using the existing pumps within the conveyor system
• Setting or changing the viscosity by introducing solvent only after overcoming the thixotropy

The rotary printing press can have a multiplicity of color systems or conveyor systems. If a color system is not involved in the printing process of the rotary printing press, it can be provided according to the invention that the pump (s) is operated at a reduced power or at a reduced pump frequency, whereby the thixotropy of the ink remains overcome.

Fig. 1

eine Vorrichtung zur Einstellung mindestens eines Betriebsparameters einer Farbe für einen Druckprozess einer Rotationsdruckmaschine, bei der eine Rakelvorrichtung mit ihrer Rakelkammer eingefärbt wird, und

Fig. 2

die Vorrichtung gemäß Figur 1, wobei eine Förderung der Farbe in die Rakelkammer gesperrt ist.

Further advantages, features and details will become apparent from the following description in which an embodiment of the invention is described in detail with reference to the drawings. In each case, the features mentioned in the claims and in the description can each be essential to the invention individually or in any desired combination. Show it:

Fig. 1

a device for adjusting at least one operating parameter of a color for a printing process of a rotary printing press, in which a doctor device is colored with its doctor chamber, and

Fig. 2

the device according to FIG. 1 , wherein a promotion of the color is blocked in the doctoring chamber.

In the FIGS. 1 and 2 a possible embodiment of a color system 10 is shown, which is arranged on a rotary printing press 1. Here, the color system 10 is mainly for the purpose of supplying the squeegee device 11 with the corresponding ink 2 during the printing process of the rotary printing machine 1. The doctor device 11 in this case has a doctor chamber 12 into which the corresponding amount of ink is provided by the ink system 10. About the corresponding configuration of the doctor device 11 is transferred from the doctoring chamber 12 to a corresponding printing unit color 2, whereby the printing operation of the rotary printing press 1 is ensured.

To provide the ink 2 during the normal printing process, the ink system has a paint container 13 in which the ink 2 is located. In addition, located between the squeegee device 11 and the ink container 13 is a conveyor system 20, which is part of the ink system 10. The conveyor system 20 has various pumps 31, 41, lines 30, 40 and valves, so that a cycle for the color 2 from the ink container 13 to the doctor device 11 and back to the ink container 13 is formed. During the printing process according to FIG. 1 Color 2 flows through the main supply line 30, the flow pump 31 is activated and color 2 flows through the supply line 33, 34. In this case, the main supply line 30 has two valves 35, 36, wherein both valves 35, 36 are open.

As can be seen in both figures, the conveyor system 20 has a bypass line 21 with a valve 25, wherein the bypass line 21 connects the main supply line 30 with the main discharge line 40. According to FIG. 1 the valve 25 is closed, so that a cycle of the color 2 takes place only via the doctor chamber 12. During the printing processes of the rotary printing machine 1, the return pump 41 is also activated, so that the discharge line 43, the suction side of the return pump 41 and represents the Outlet line 44 is the pressure side of the return pump 41. In addition, the main discharge line 40 has two valves 45, 46, which during the printing process according to FIG. 1 are open.

The conveyor system 20 is designed in such a way that the conveyor system 20 can be switched into a setting mode I and into a production mode 11. The setting mode I is in FIG. 2 shown. Production mode II is in FIG. 1 shown. In production mode I, the conveyor system 20 provides a production cycle which leads back from the ink container 13, through the main supply line 30, through the doctoring chamber 12 and through the main discharge line 40, back into the paint container 13. In setting mode I, a color 2 adjusting circuit is formed, and the ink 2 is conveyed by the conveying system from the ink tank 13 through the main supply pipe 30, through the bypass pipe 21, through the main discharge pipe 40, back to the ink tank 13. In setting mode II, the valve 25 is opened, the valves 45, 35 are closed. The valves 46, 36 are open both in the setting mode II and in the production mode I, so that an open circuit for the color 2 is ensured.

In order to be able to carry out a preconditioning of the printing ink for the printing process of the rotary printing machine 1, an adjustment of at least one operating parameter of the printing ink 2 is initially carried out in order to ensure a high quality of the printing process in the production mode of the conveying system 20. In particular, it has been shown that the operating parameter viscosity has a high importance. The color system 10 has checking means 22, 24, the checking means 24 monitoring the viscosity of the ink. By contrast, the checking means 22 can determine or monitor the temperature of the ink 2. Both checking means 22, 24 are arranged on the main feed line 30 in the present exemplary embodiment. The checking means 24 can also be arranged behind the flow pump 31 but before the bypass line 21. The checking means 24 is an ultrasonic sensor in the present embodiment. The checking means 22, however, is designed as a temperature sensor. The checking means 22, 24 can also be combined in one unit. In setting mode I according to FIG. 2 As long as the operating parameters, in particular the viscosity is adjusted until a desired viscosity is reached. The influence of the viscosity is carried out by adding a resource through the Feed station 90. The feed station 90 has lines 91, 92, 93, the line 92 having a valve 94 and the line 93 having a valve 95. Now, if a resource, in particular solvent is introduced into the conveyor system via the feed station 90, the valve 94 is in the open position (which is not explicitly shown). The valve 95 remains in the closed position. At the same time, the valve 46 of the main discharge line 40 is in its closed position. This is intended that the solvent is conveyed directly into the paint container 13. There is a thorough mixing, for example by a mixer or a stirrer. While the color 2 is further conveyed in the adjustment circuit, the checking means 24 checks the viscosity of the ink 2. By adjusting the temperature additionally via the color temperature control 23, the viscosity of the ink 2 can also be influenced. Only when the setpoint viscosity is reached, the conveyor system 20 is switched over from the setting mode I to the production mode II, which in FIG. 1 is shown. In this case, the valve 25 is closed, so that no color 2 can flow through the bypass line 21. At the same time, the valves 35, 45 are opened so that the paint can flow in the production cycle.

In production mode II, a further check of the viscosity of the ink 2 takes place by means of the checking means 24, 22. If now in production mode II the operating parameter should not correspond to the desired parameter, a corresponding introduction of the solvent into the conveyor system 20 takes place via the feed station 90, whereby the viscosity can be influenced accordingly. In this case, the bypass line 21 remains locked.

In addition, the conveyor system 20 has a cleaning device 70, which allows a cleaning solvent to flow into the conveyor system 20 for cleaning the paint system 10. The cleaning device 70 has a line 71 with a valve 72, which in accordance with FIG. 1 and FIG. 2 closed is. In addition, the device according to the invention has the ability to pump out the paint 2 from the conveyor system 20 after a printing process, for which purpose a line 61 is provided with a valve 64, which is arranged on the main discharge line 40. Now, if the color 2 is to be removed from the paint system 10, the valve 64 is opened, at the same time the valve 46 according to FIG. 1 is closed. The bypass line 21 remains closed. About at least one pump 31, 41, the color 2 can be pumped from the paint system 10, the line 61 in a not explicitly shown container is performed to fill this container with the color 2. Thereafter, it is possible to supply the cleaning solvent from the container 70 into the delivery system 20 with the valve 72 open. Thus, the conveyor system 20 and the paint system 10 can be completely washed with the cleaning solvent, wherein the corresponding valves are to be opened or closed within the conveyor system 20 so that all essential lines can be washed by the cleaning solvent. The paint container 13 can serve as a catch basin for the color remover-enriched cleaning solvent. After the cleaning process, the contaminated cleaning solvent can be pumped out of the paint container 13 into a dirt container 80 via an opening of the valve 82 and a closing of the valve 46. Advantageously, during the Abpumpvorganges the valve 35 and the valve 45 should be closed so that the paint-enriched cleaning solvent passes through the open valve 25 into the dirt container 80.

The illustrated embodiment may include a not explicitly shown control and / or regulating unit, which automatically the circuit of the conveyor system 20 in its setting mode I and / or in its production mode II or cleaning the conveyor system 20 by the cleaning solvent or pumping out of the dirty detergent activated. It is also conceivable that the setting mode I, the production mode II, the cleaning process or the pump-down process are activated and / or deactivated manually.

The color temperature control 23 in the present exemplary embodiment is a heat exchanger which has a water supply line 26 and a water return line 27. The color flow in the main discharge line 40 is aligned with the water flow of the heat exchanger 23 in countercurrent. LIST OF REFERENCE NUMBERS 1 Rotary press 2 colour 10 color system 11 doctor device 12 blade chamber 13 paint container 20 conveyor system 21 bypass line 22 Checking means, temperature sensor 23 Color temperature control, heat exchanger 24 Viscosity meter, checking agent 25 Valve 26 water supply 27 Water return line 30 main supply 31 flow pump 33 feed 34 feed 35 Valve 36 Valve 40 Hauptabführleitung 41 Return pump 43 discharge 44 discharge 45 Valve 46 Valve 61 management 64 Valve 70 Cleaning solvent tank 71 Lösemittelzuführleitung 72 Valve 80 dirt container 81 feed 82 Valve 90 feeding 91 management 92 management 93 management 94 Valve 95 Valve I setting II production mode

Claims (14)

1. Apparatus for setting at least one operating parameter of an ink (2) for a printing process of a rotary printing press (1), having
   an ink system (10) which has a doctor apparatus (11) with a doctor chamber (12), in which ink (2) for the printing process is contained, and an ink container (13), from which ink (2) can be conveyed into the doctor chamber (12),
   a conveying system (20) which makes it possible to convey the ink (2) within the ink system (10),
   the ink system (10) has at least one checking means (22, 24) in order to check the operating parameter,
   while at least one checking means (22, 24) measures and/or determines the viscosity of the ink and/or the temperature of the ink (2),
   characterized in
   that the conveying system (20) being configurated in such a way that the conveying system (20) can be switched into a setting mode (I) and into a production mode (II), while
   in the setting mode (I) automatic setting of the operating parameter can be carried out and conveying of the ink (2) into the doctor chamber (12) is suspended, and
   in production mode (II) the conveying system (20) conveys ink (2) into the doctor chamber (12),
   while the monitoring of the ink (2) is carried out in setting mode (I) and in production mode (II).
2. Apparatus according to Claim 1, characterized in that the conveying system (20) for the doctor chamber (12) has a main feed line (30) and a main discharge line (40),
   the conveying system (20) having at least one pump (31, 41) which has the main feed line (30) or the main discharge line (40), and
   a bypass line (21) being arranged between the doctor chamber (12) and the pump (31, 41).
3. Apparatus according to Claim 1 or 2, characterized in that the conveying system (20) has a production circuit for the production mode (II) and a setting circuit for the setting mode (I).
4. Apparatus according to Claim 2, characterized in that the bypass line (21) is shut in the production mode (II), and the bypass line (21) is open in the setting mode (I).
5. Apparatus according to one of the preceding Claims 2-4, characterized in that the main feed line (30) has a forward flow pump (31) and the main discharge line (40) has a return pump (41).
6. Apparatus according to one of the preceding Claims 3-5, characterized in that the conveying system (20) has a feed station (90), by way of which an operating consumable can be introduced into the setting circuit, in order to set and/or to change the operating parameter, the operating consumable being, in particular, a solvent.
7. Apparatus according to Claim 1, characterized in that the checking means (24) is an ultrasonic sensor and/or a temperature sensor (22).
8. Apparatus according to one of the preceding claims, characterized in that the conveying system (20) has an ink temperature control means (23) which is arranged, in particular, in the main discharge line (40).
9. Method for setting at least one operating parameter of an ink (2) for a printing process of a rotary printing press (I), having
   an ink system (10) which has a doctor apparatus (11) with a doctor chamber (12), in which ink (2) for the printing process is contained, and an ink container (13), from which ink (2) can be conveyed into the doctor chamber (12),
   a conveying system (20) which makes it possible to convey the ink (2) within the ink system (10),
   while the ink system (10) contains at least one checking means (22, 24) in order to check the operating parameter while at least one checking means (22, 24) measures and/or determines the viscosity of the ink (2) and/or the temperature of the ink (2),
   characterized in
   that the conveying system (20) being configurated in such a way that the conveying system (20) can be switched into a setting mode (I) and into a production mode (II), while
   in the setting mode (I) an automatic setting of the operating parameter is carried out and access of the ink (2) into the doctor chamber (12) is shut off, and
   in production mode (II) the conveying system (20) conveys ink (2) into the doctor chamber (12),
   while the monitoring of the ink (29) being carried out I the setting mode (I) and in the production mode (II).
10. Method according to Claim 9, characterized in that the conveying system (20) has a production circuit for the production mode (II) and a setting circuit for the setting mode (1), which circuits are operated, in particular, separately from one another.
11. Method according to Claim 9 or 10, characterized in that the operating parameter is the viscosity of the ink (2) which is set in the setting mode (I).
12. Method according to one of the preceding claims, characterized in that the conveying system (20) has a feed station (90), by way of which an operating consumable is introduced into the setting circuit if a setpoint value of the operating parameter is not adhered to, in particular if a setpoint value of the operating parameter is undershot or exceeded.
13. Method according to one of the preceding claims, characterized in that the conveying system (20) for the doctor chamber (12) has a main feed line (30) and a main discharge line (40),
    the conveying system (20) having at least one pump (31, 41) which has the main feed line (30) or the main discharge line (40),
    a bypass line (21) being arranged between the doctor chamber (12) and the pump (31, 41),
    in particular, the operating consumable being fed to the main discharge line (30) and thorough mixing of the operating consumable with the ink (2) being carried out in the ink container (13).
14. Method according to one of the preceding claims, characterized in that the conveying system (20) has a cleaning apparatus (70, 71, 72) which allows a cleaning solvent to flow into the conveying system (20) in order to clean the ink system (10).

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