WO2011072895A1 - Dryer - Google Patents

Abstract

The invention relates to an arrangement, having a dryer of a rotary printing press and a printing material, wherein the dryer is arranged or can be arranged so as to act on the printing material and/or varnish and/or printing ink situated on the printing material, and wherein the dryer has at least one pressure chamber which is loaded or can be loaded with a pressurized gas or gas mixture and which is connected to at least one outlet opening, wherein the at least one outlet opening is of slot-shaped configuration and has a smallest extent of from 0.01 mm to 0.5 mm and is arranged or can be arranged such that it is configured so as to feed gas or gas mixture to the printing material, and wherein at least one inlet opening is arranged or can be arranged so as to transport away gas or gas mixture from the printing material, and wherein the gas or gas mixture in the at least one pressure chamber has a temperature of at least 60°C in a first operating state, and wherein an angle which a gas stream which emanates from the at least one outlet opening is configured to include with the printing material is smaller than 45 °.

Description

 description

dryer

The invention relates to an arrangement comprising a dryer a

Rotary printing machine according to the preamble of claim 1.

In printing machines, usually at least one printing ink and / or at least one paint is transferred to at least one printing substrate. For example, to avoid smearing freshly printed ink on subsequent components of the printing machine, such as guide rolls or the like, or bleeding colors or problems with multicolor printing, it is necessary that the appropriate

Printing ink or the corresponding paint dries as quickly as possible. In addition to chemical drying processes, for example by radiation-induced drying by means of UV radiation, there is the often occurring purely physical drying. The ink can dry by knocking, d. H. by incorporating liquid components of the ink into the substrate and leaving the solid components on the printed surface. Alternatively, or in addition, the printing ink can also be dried by evaporation of liquid constituents of the printing ink, for example solvents or water.

To assist drying by evaporation of liquid ingredients, dryers are commonly used in printing presses. Such a dryer usually comprises a device for generating an air flow, because the drying due to evaporation is faster, if an additional forced convection increases the mass transfer. Air of such an air flow can, for example, additionally be heated in order to accelerate the drying even further.

A printing material, which is moved by the printing press, has a laminar Air film on which at least partially moves together with the substrate and its flow rate decreases with a distance to the substrate.

Moisture or an accumulation of other components to be evaporated from ink to be dried with the dryer that has already evaporated from the ink is initially contained within this laminar film. In dryers, for example, bring a large amount of heated air at a relatively low speed as close to the substrate, the laminar film from the outside Shen dried by the heated air and thereby in turn able to absorb moisture or other components to be removed from the ink , so that ultimately the printing material is dried. However, a certain exposure time is necessary for this, which means in the case of a rapidly moving printing material that a dryer must act on the printing material over a corresponding length and must itself be correspondingly long, for example several meters long.

DE 694 15 622 T2 discloses a hot air dryer for installation in a printing press, the dryer comprising a dryer head having a housing element defining an air distribution chamber, the housing element having an airflow inlet opening for receiving high velocity air and an airflow discharge opening to direct heated air to a substrate, wherein an air supply pipe is arranged in the air distribution chamber, wherein the

Air distribution pipe has an elongated air flow passage connecting the inlet opening in airflow communication with the air distribution chamber, wherein a

Heating element is disposed within the elongated air flow passage of the air supply pipe and wherein the inlet surface of the inlet opening is greater than that

Outlet area of the discharge opening, so that uniform discharge of air from the dryer is ensured and wherein the air discharge opening comprises an elongated slot.

From DE 102 25 753 A1 a drying device with at least one Nozzle arrangement with elongated linearly effective nozzle outlet for inflating a drying medium on a surface to be dried, the

Nozzle arrangement has an effective nozzle opening width of 0.01 mm to 0.5 mm.

WO 96/07490 A1 discloses a method for removing dust particles from a relatively moving material web surface, in which a gas stream emerging from a blowing unit is adjusted in such a way that in a region between a printing material and the dedusting device a product of a pressure of the

Gas flow and a distance of the dedusting device fail such that after the Pascheneffekt the dust particles are discharged and thereby by a

Suction unit can be sucked.

Through the publications "SCHNEIDER XT400 - Heavy duty dedusting for longitudinal and perforation" and "SCHNEIDER XT400 - High performance dedusting for sheet and web surfaces", both dated August 2007, a device is known which has two ports for supply of compressed air and an opening therebetween Removing the air and which is suitable for carrying out the method mentioned in WO 96/07490 A1 as well as for drying of printing material, which the publications "SCHNEIDER XT400 - high performance dedusting for sheet and web surfaces" and "New

Applications for the SCHNEIDER XT400 system "These three publications are available on the website www.schneiderxt400.ch.

The invention has for its object to provide an arrangement comprising a dryer of a rotary printing press.

The object is achieved by the features of claim 1. The achievable with the present invention consist in particular in that a purposefully used for drying, relative to other dryers small amount of air can be specifically controlled and thereby optimized for current drying conditions, such as a composition of a printing ink and / or a substrate used and / or a Transport speed of the substrate, can be adjusted.

Another advantage is that due to a special embodiment of openings of the dryer, through which a gas or gas mixture for drying a printing material flows on this substrate, and in particular by an angle that a laminar gas film, in particular air film adheres to the substrate , is broken up by turbulences and turbulences in a particularly effective manner and that thereby a pronounced convection and an improved drying effect is achieved.

Another advantage is that between the substrate and the dryer, a gap is created, which is limited by the substrate and the dryer and has only small openings compared to its dimensions. By introducing the gas or gas mixture into the intermediate space in the region of these openings, the formation of turbulences and turbulences is further promoted.

A further advantage is that a system is provided by this gap and a gas or gas mixture out of several openings of the dryer with at least components which are directed towards each other and with at least one evacuating opening therebetween, which prevents gas or

Gas mixture containing abzutransportierenden substances, passes into an environment of the dryer.

Another advantage is that a more effective use of gas or gas mixture used requires less gas or gas mixture for drying, which is leads to energy savings in a compression and / or heating of the gas or gas mixture.

Another advantage is that through convex curved surfaces, along which flows gas or gas mixture along, an arrangement of openings is possible, which allow a particularly small distance from the dryer and substrate, which is completely filled by air flowing into the space.

Another advantage is that thereby, that one of the printing material

nearest part of a component of the dryer part of a convexly curved, between a gas or gas mixture emitting opening and a gas or

Gas mixture receiving opening arranged surface of the component,

Flow conditions fail such that turbulence and turbulence arise particularly effectively, which break up the laminar gas film.

A further advantage is that this is further assisted by a juxtaposition of convex and concave surface areas of an area between the gas or gas mixture emitting opening and the gas or gas mixture receiving opening.

Another advantage is that the dryer can be partially deactivated, so that no more compressed air is consumed in this area, for example, in printing material, which is less wide than a maximum possible width to be dried.

Another advantage is that a heating of the air used in the dryer can also be partially controlled and optionally switched off, so that not only energy can be saved, but also a drying on

Requests of the respective area of the printing material can be set up, for example, if over a width of the substrate different amounts of ink must be dried. As a result, a particularly gentle treatment of the printing material is possible.

Another advantage is that due to the particularly effective

Drying a dryer requires only a small space and thus space-saving and possibly also can be subsequently arranged in a printing press.

Embodiments of the invention are illustrated in the drawings and will be described in more detail below.

Show it:

Figure 1 is a schematic representation of a printing press with four printing units, a coating unit and several dryers.

Fig. 2 is a schematic representation of a dryer and a compressed air supply;

Fig. 3 is a schematic sectional view of a dryer;

FIG. 4 is an enlarged view of a portion of FIG. 3; FIG.

5 is an enlarged view of an alternative of the subregion analogous to FIG. 4;

Fig. 6 is an enlarged view of another portion of Fig. 3;

Fig. 7 is a schematic sectional view of a dryer from one direction

perpendicular to that in Fig. 3; Fig. 8 is a schematic sectional view of a dryer from a direction perpendicular to that in Fig. 3 and 4.

A printing machine designed as a rotary printing press can be designed as a sheet-fed rotary printing press or as a rotary rotary printing press. There are different printing methods possible, one or more of which can be used in the printing press, for example, gravure printing method, high-pressure method, screen printing method and / or planographic printing method, in particular offset printing method. Also, so-called non-impact printing methods can be used, which have no physical printing form, such as ink-jet printing process. The printing press has at least one printing unit and each printing unit has at least one printing unit 01. Under a printing unit 01 is also a coating unit 02 to understand and when in the following of printing ink and / or paint and / or paint is mentioned, it is, unless otherwise stated, always meant both color or ink, as well as paint , The same applies to printing units 01 and coating 02.

The printing machine has at least one printing unit 01, for example at least four printing units 01, in each of which different printing inks can be used. The inks differ, for example, in their color, for example, the four colors yellow, magenta, cyan and black can be used. However, the colors may in principle also differ in other physical and / or chemical properties, for example their viscosity and / or their composition. In one embodiment, in addition to the at least one printing unit 01, at least one coating unit 02 is arranged, which can preferably at least partially coat a previously printed substrate 03 with a lacquer layer.

Such a substrate 03 may be web-shaped or arcuate, depending on the printing press be. The printing material 03 may be, for example, paper, cardboard, plastic film, sheet metal or other. There are also different thicknesses possible, from fractions of millimeters, for example, in paper, up to several millimeters, for example in sheet metal.

In one embodiment of the printing machine is based on a transport path of the printing material for at least one printing unit 01 and / or at least one

Lackierwerk 02 at least one dryer 04 arranged. An arrangement of a dryer 04 between printing units 01 ensures that ink applied in a printing unit 01 and ink applied in a subsequent printing group 01 are not inadvertently mixed, for example on the printing substrate 03 or on components of a printing unit 01. In another or the same embodiment, a plurality of dryers 04 are arranged directly behind one another in order to achieve an even greater drying effect. In another or one of the preceding embodiments, at least one dryer 04 is arranged after each printing unit 01 and / or after each coating unit 02 (FIG. 1). If the printing material 03 is printed on both sides, preferably at least two dryers 04 are arranged, one of which is arranged on one side of the

Substrate 03 and another on another side of the substrate 03 is formed acting. Preferably, at least after a last printing unit 01 or

Lackierwerk 02 a dryer 04 arranged to allow a final drying and thus to protect a finished printed printed product against harmful influences, for example by subsequent means, for example

Deflection rollers, folders, handling devices or the like.

The at least one dryer 04 works with a pressurized gas or gas mixture, preferably compressed air. For this purpose, at least one feed line 06 is connected via a compressed air unit 07 to at least one compressed air source 08, for example a compressor 08 or a container 08 filled with compressed air, for example a gas cylinder 08. It is also possible in principle, other pressurized Use gases or gas mixtures as air, for cost reasons, however, the use of compressed air is preferred. For the sake of simplicity, therefore, in the foregoing and in the following, usually only air or compressed air is mentioned, but the same applies to all usable gases and gas mixtures. The compressed air unit 07 preferably has at least one pressure reducer 09 for setting a desired air pressure and at least one filter 1 1 or compressed air filter 1 1 for cleaning the dryer 04 supplied compressed air. Various sensors 12 are preferably arranged, which detect an air pressure at an input 13 of the compressed air unit 07 and an air pressure at an output 14 of the compressed air unit 07 and further forward to a machine control. Preferably, the air pressure at the output 14 by means of the pressure reducer 09 via the machine control is controlled, more preferably adjustable. Furthermore, at least one sensor 12 for controlling components of the compressed air and / or a sensor 12 for checking the state of the compressed air filter 11 are preferably arranged. The compressed air filter 1 1 serves, for example, a clogging of openings 16; 17; 18 of the dryer 04 to avoid. The Duckluftfilter 1 1 can also be designed in several stages and, for example, in series filter stages for different sizes

have particles to be filtered out.

Hereinafter, an example of hydrous color and removal of water or moisture by the dryer 04 will be described. All that has been said can be analogously transferred to other constituents to be removed from printing inks or varnishes, for example solvents, and is to be interpreted accordingly. By means of a laminar gas film usually entrained with the printing material 03, the air in the vicinity of the undried printing substrate 03 is always almost saturated with moisture without the dryer 04 and can absorb only a small amount of moisture, so that a low moisture gradient prevails in the immediate vicinity of the printing substrate 03 and a slight drying effect of the printing material 03 occurs. Since the air is at least partially entrained with the substrate 03, the corresponding moisture is carried and prevents drying of the substrate 03 through the Transport by the printing substrate 03 is not or only slightly with less saturated air into contact. The principle of operation of the dryer 04, however, is to eliminate this laminar film or at least in his

Expansion to reduce perpendicular to the substrate 03 strongly and thus increasingly saturated with moisture dissipate air from the substrate 03 and introduce unsaturated and preferably dry air to the substrate 03. This unsaturated air can then absorb moisture from the printing substrate 03 and thus contribute to its drying. In this way, moisture is very effectively and quickly removed from the paint to be dried and removed. The elimination or at least greatly reducing the laminar film is achieved in that the compressed air is subjected to a high pressure and subsequently by at least one at least in one direction very narrow opening 16; 17 or exit opening 16; 17 leak, so that the leaked air has a high speed. For example, the speed can be up to several hundred meters per second. Thereby and through the selected direction of out corresponding openings 16; 17 emerging air currents turbulence and pressure fluctuations are caused, which break up or destroy the laminar film at least partially.

To break up the laminar air film is compressed air through the dryer 04 and through at least one opening 16; 17 of the dryer 04 passed to the substrate 03. The dryer 04 is connected to the compressed air source 08 via the at least one feed line 06. The feed line 06 ends preferably in at least one distributor head of the dryer 04, from which branch off a number of intermediate lines, which in turn are connected to respective openings 19 of at least one first pressure chamber 21. The openings 19 of the first pressure chamber 21 are preferably uniform, more preferably equidistant along a direction A of the pressure chamber 21, which is preferably expanded in an assembled state of the dryer 04 mainly perpendicular to a transport direction B of the printing material 03. The transport direction B is not the same everywhere with respect to a viewpoint or reference point. With the Direction of transport B is meant in each case the direction in which the printing substrate 03 is transported in the drying operation at a location which is closest to the respective viewpoint or reference point. The direction A is always the direction which is perpendicular to the transport direction B of the printing substrate 03 and into which the printing material 03 extends. Due to the preferably uniform distribution of the openings 19 prevails in the pressure chamber 21 preferably over an entire length of the pressure chamber 21 in the direction A, an equal pressure and a uniform temperature distribution. This pressure can be as described previously preferably control and further preferably regulate and is preferably in the range of 2 bar to 7 bar, more preferably in the range of 3 bar to 5 bar (where 1 bar = 10 ^Λ 5 Pa), with pressure data as Absolute pressure are specified, ie that a specified pressure of 2 bar corresponds to an overpressure of 1 bar compared to the atmosphere. The drying operation represents a first operating state of the dryer 04 and the printing press.

Preferably, a heater 22 is disposed along at least one intermediate line, more preferably along several intermediate lines, and even more preferably along all intermediate lines, which are preferably arranged as a heating cartridge 22 or as

Hochleistungsheizpatrone 22 is formed and, for example by means of a

Current-carrying coil with corresponding resistance generates heat. Such a heating cartridge 22 is preferably sleeve-shaped and encloses at least a part of the at least one intermediate line or itself forms at least a part of the at least one intermediate line. Compressed air coming from the compressed air source 08 is already preheated in one embodiment, for example by a

Compression process, and can be further heated or heated by means of at least one heater 22. The temperature of the compressed air is at least in the first operating state after passing through the heater 22 and in the at least one

Pressure chamber 21 at least 60 ° C. Preferably, the compressed air can be heated to temperatures above 400 ° C, more preferably above 550 ° C. At least one intermediate conduit is, as already mentioned, at least one first pressure chamber 21 connected, preferably in the compressed air at least when entering the pressure chamber 21, the above-mentioned temperature of at least 60 ° C. In order to control a heating power of the heaters 22, at least one thermal sensor is arranged, preferably a plurality of thermal sensors are arranged, and more preferably, each heater 22 is associated with at least one thermal sensor.

In addition to the at least one opening 19 connected to the at least one intermediate line, the at least one first pressure chamber 21 furthermore has the at least one slot-shaped opening 16 or outlet opening 16, which extends preferably over almost the entire extent of the dryer 04 in the direction A perpendicular to

Transport direction B of the printing substrate 03 extends. With almost the entire

Expansion is preferably meant a proportion of at least 95%. In any case, however, the at least one slot-shaped opening 16 or the plurality of slot-shaped openings 16 is expanded overall over a length which corresponds to at least one width of a region of the printing material 03 to be dried, ie an extension in the direction A. In a preferred embodiment, the at least one slot-shaped opening 16 is at least as far in its length as the width of the printing material 03 to be dried.

The following is the sake of simplicity of an opening 16 the speech, the same applies of course for the case that a plurality of openings 16 are arranged. Preferably, the slot-shaped opening 16 by at least two components 23; 24 formed, which are matched in shape and which can be adjusted to each other during assembly and / or later in their relative position, for example, to influence a dimension of the opening 16. Each of these at least two components 23; 24 preferably has at least one area 31 extended in the direction A; 26 and / or edge and the relative position of these surfaces 31; 26 and / or edges of the two components 23; 24 determines each other an extension of the slot-shaped opening 16 in the

Transport direction B of the printing substrate 03. This extension is the width of the opening 16 denotes. An extension of the opening 16 in the direction A is called the length of the opening 16. The width of the opening 16 can preferably be influenced by the fact that between the components 23; 24 a seal is clamped, which serves on the one hand to seal the pressure chamber 21 except for the opening 16 and the other is designed to be elastic. The seal can be used as an elastic bearing for pivoting the components 23; Serve 24 relative to each other, wherein still appropriate adjusting means, such as screws or spindles are arranged, which can be preferably influenced by machine and more preferably via the machine control. In this way, the width of the opening 16 can be changed without leaking the pressure chamber 21 would occur. The seal can, for example, from a

Elastomer, for example rubber exist.

The component 23 is in the region of the opening 16 relative to the component 24 in

Transport direction B of the substrate 03 arranged below. The component 24 has a preferably flat surface 26, which extends at least in the direction A perpendicular to the transport direction B. The surface 26 closes with a plane E, the one

Tangency level E is to the substrate 03 and which is determined by a to

Component 24 next line of intersection of a linear extension of the surface 26 with the substrate 03, an angle α, which is preferably between 10 ° and 170 °, more preferably between 45 ° and 135 ° and even more preferably between 70 ° and 1 10 °. The surface 26 ends in a direction pointing to the substrate 03 at an edge 27. At this edge 27, the surface 26 and another, curved surface 28 abut each other. A tangent plane F to this curved surface 28 passing through the edge

27 extends, includes with the flat surface 26 an angle ß, which is preferably between 10 ° and 170 °, more preferably between 45 ° and 135 ° and even more preferably between 70 ° and 1 10 °. In a preferred embodiment, the angles α and β deviate from each other by at most 10 °, in a further preferred embodiment the angles α and β are equal. A radius of curvature r28 of the curved surface

28 is preferably between 10 mm and 130 mm, more preferably between 15 mm and 60 mm and more preferably between 20 mm and 30 mm. The radius of curvature r28 is preferably at most as large as a radius of curvature r03 of the printing substrate 03 at a location of the printing substrate 03 closest to the edge 27. As a result, an intermediate space is formed between the dryer 04 and the printing substrate 03, which through the substrate in the first operating state 03, the dryer 04 and two slot-shaped openings each between substrate 03 and dryer 04 is formed. Such a radius of curvature r03 of the printing substrate 03 can be determined, for example, by a roller 29 or cylinder 29 looped around by the printing material 03 and is at least 20 mm, preferably at least 40 mm, and can also be infinitely large, namely in the case of a printing material which is not curved at this point 03. The printing material 03 is preferably located at its location closest to the component 24 in a drying operation between 0.05 mm and 10 mm away from the component 24, more preferably between 0.1 mm and 6 mm. This point closest to the component 24 defines a boundary of said intermediate space, namely one of said slot-shaped openings. The limitation is thus a point of a smallest distance between printing substrate 03 and dryer 04. A further limitation of the intermediate space is defined by a further of the mentioned slot-shaped openings. The gap has an extent in each spatial direction that is at least twice as large as a minimum extent of this opening of the gap, which is defined by the said boundary. This is for example due to the different ones

Radii of curvature r03 of the printing substrate 03 and corresponding components 24; 39 of the dryer 04 given. The space is at least in the first operating state with arranged substrate 03 exclusively limited by components of the dryer 04, the substrate 03 and the two slit-shaped openings whose minimum dimensions are each at most 10 mm and preferably at most 6 mm.

The component 23 has a preferably flat surface 31 whose shape is more preferably adapted to the shape of the surface 26 of the component 24, so that through the surfaces 31 and 26, the gap-shaped opening 16 is at least partially formed. In the region of the edge 27 of the component 24, the component 23 also has an edge 32. Adjacent to the surface 31, another surface 33 of the component 23 adjoins this edge 32.

While the component 24 fills the acute or obtuse angle β between the surface 26 and a tangent plane F to the surface 28 and through the edge 27, the component 23 fills an obtuse angle between the surface 31 and the surface 33. This obtuse angle represents an external angle. The associated internal angle is the angle γ and is preferably between 10 ° and 170 °, more preferably between 45 ° and 135 ° and even more preferably between 70 ° and 10 °, depending on how large the angle is ß. The angles β and γ preferably deviate from each other by at most 30 °; more preferably, the angle γ is at most 10 ° greater than the angle β and even more preferably the angles ß and γ are the same size. The surface 33 preferably extends in a direction perpendicular to the direction A only by less than 2 mm, more preferably by 0.1 mm to 0.5 mm. It is part of a nose which encloses the edge 27 of the component 24. This nose preferably extends, with respect to a virtual cylindrical surface defined by the curved surface 28, by less than 1 mm in a direction defined by a shortest connection between the edge 27 and the edge

Substrate 03 is fixed.

Preferably, no component of the component 23 has a smaller distance to the

Stock 03, as the nose. Through this nose, it is possible in a particularly suitable manner to guide the compressed air emerging from the opening 16 along the curved surface 28. In addition, it is thereby possible to guide the printing material 03 as close as possible to the curved surface 28 of the component 24, without the component 23 or the component 24 coming into contact with the printing material 03. An end region of the opening 16 points in a direction which forms an angle with the tangent plane E which is less than 60 °, preferably less than 45 ° and more preferably less than 15 °. In the end region of the opening 16, this opening 16 has a width, ie a smallest

Extension in a direction perpendicular to the direction A, between 0.01 mm and 0.5 mm, preferably between 0.1 mm and 0.3 mm. The direction in which the opening 16 points, is defined as the average direction of the two pointing to the opening 16 directions of the two opposite, the opening 16 in its end region bounding surfaces and is preferably perpendicular to the direction A and the width of the opening 16th

In another embodiment, which does not have such a shaped nose and which preferably does not differ from that described above except for differences described, the components 23 and 24 are shaped as follows (Figure 5):

The component 23 is in the region of the opening 16 relative to the component 24 in

Transport direction B of the substrate 03 arranged below. The component 24 has a preferably flat surface 26, which extends at least in the direction A perpendicular to the transport direction B. The surface 26 closes with a plane E, the one

Tangent plane E to the substrate 03 and which is defined by a component 24 next cutting line of a straight line extension of the surface 26 with the substrate 03, an angle α, preferably between 10 ° and 170 °, more preferably between 45 ° and 135th ° and even more preferably between 70 ° and 1 10 °. The surface 26 ends in a direction pointing to the substrate 03 at an edge 27.1. At this edge 27.1, the surface 26 and another surface 27.2 abut

each other. An extension of the surface 27.2 includes an angle δ with the tangent plane E. The angle δ is between 100 ° and 160 °, preferably between 1 15 ° and 145 ° and more preferably between 130 ° and 140 °. The surface 27.2 is bounded by an edge 27 on the side opposite the edge 27.1. At the edge 27, the surface 27.2 and the curved surface 28 abut each other. A tangent plane F to this curved surface 28, which extends through the edge 27, encloses with the flat surface 26 an angle β, which is preferably between 10 ° and 170 °, more preferably between 45 ° and 135 ° and even more preferably between 70 ° and 1 10 °. In a preferred embodiment, the angles α and β differ by at most 10 ° from each other, in a further preferred embodiment, the angles α and ß are equal. A radius of curvature r28 of the curved surface 28 is preferably between 10 mm and 130 mm, more preferably between 15 mm and 60 mm and even more preferably between 20 mm and 30 mm. The radius of curvature r28 is again preferably at most as great as a radius of curvature r03 of the printing substrate 03 at a location of the printing material 03 closest to the edge 27.

The component 23 has a preferably flat surface 31 whose shape is more preferably adapted to the shape of the surface 26 of the component 24, so that the gap-shaped opening 16 is formed by the surfaces 31 and 26. In the region of the edge 27. 1 of the component 24, the component 23 likewise has an edge 32. Adjacent to the surface 31, another surface 33 of the component 23 adjoins this edge 32. While the component 24 fills the acute or obtuse angle β between the surface 26 and the tangent plane F, the component 23 fills an obtuse angle between the surface 31 and the surface 33. This obtuse angle represents an external angle. The associated internal angle is the angle γ and is preferably between 10 ° and 170 °, more preferably between 100 ° and 160 ° and even more preferably between 1 10 ° and 140 °, depending on how large are the angles α and δ. The surface 33 is a boundary of a nose bounded on an opposite side by a surface 34. This surface 34 is preferably curved; more preferably, their radius of curvature is just as great as the radius of curvature r28 of the curved surface 28 of the component 24, and even more preferably, the surface 34 lies on a same virtual cylinder jacket surface as the curved surface 28.

Preferably, no component of the components 23 and 24 has a smaller distance from the substrate 03 than the curved surfaces 28; 34. In this way, it is possible to guide the printing material 03 as close as possible to the curved surface 28 of the component 24, without the component 23 or the component 24 coming into contact with the printing substrate 03. The opening 16, as described between the components 23 and 24th runs, is therefore directed at least with a component on the substrate 03. An end region of the opening 16 points in a direction which forms an angle with the tangent plane E, which is preferably smaller than 70 ° and more preferably smaller than 50 °. In the end region of the opening 16, this opening 16 preferably has a width, that is to say a smallest extent, which lies between 0.01 mm and 0.5 mm, preferably between 0.1 mm and 0.3 mm.

Another embodiment differs from that just described by the fact that no edge 27 is present, but the surface 27.2 merges fluently and without edge in the surface 28, wherein a curvature of the component 24 limiting surface 28 and 27.2 preferably from convex to concave changes and thus has a turning line. The surface 33 of the component 23 is then adapted accordingly and preferably also curved.

With a convex curvature of a component limiting surface is in

Previous and hereinafter means that the corresponding, limited by the area in this area component is curved convex, so that is a tangent or tangent surface to this surface in the vicinity au ßerhalb the component. For concave curvatures, the opposite applies analogously, ie in particular that a tangent or tangent surface is located within the component.

In any case, regardless of the embodiment, air which flows out of the opening 16 at least in the first operating state is guided along the printing substrate 03 by the alignment of at least the end region of the opening 16. The air is thereby guided into the space between dryer 04 and substrate 03 until it passes into a further opening 18 of the dryer 04, which is also referred to as an inlet opening, and is transported away from there. Turbulence and turbulence are generated by the transport direction B of the printing substrate 03, which direction is opposite to the flow direction. For this purpose, the surface 28 is formed so that it is opposite to the Transport direction B of the printing material 03 seen after a region with a concave curvature merges into a region with a convex curvature. This convex region of the surface 28, which preferably has a minimum radius of curvature of 1.5 mm, then in turn merges into a boundary wall 36 of a

Exhaust air chamber 37.

It is preferably still at least a second opening 17 is arranged, which is also formed as an outlet opening 17 and flows out of the air, which is used to dry the

Substrate contributes 03 and is transported through the opening 18. This at least one opening 17 is located on a different side of the opening 18 than the opening 16, in particular with respect to the transport direction B of the printing substrate. Air thus exits from at least two outlet openings 16; 17 from the dryer 04 and enters the between these at least two outlet openings 16; 17 lying inlet opening 18 again in the dryer 04, to be transported away. In this way, an area delimited by air streams is created in which the laminar air layer is broken up and swirled and subsequently removed. This delimited area is substantially the same as the already mentioned space between the substrate 03 and the dryer 04 match. This makes it possible to carry away the moisture detached from the printing material 03 through the opening 18 and to prevent it from escaping into an environment of the dryer 04. This is particularly important in the case in which not just moisture but also, for example, or exclusively solvent should be removed from the substrate 03 and / or color befindlichem thereon. It is therefore an almost complete system, although no direct contact of the dryer 04 with the substrate 03 is necessary and / or given. For this purpose, an air stream leaving the opening 17 is preferably directed onto the opening 18 with at least one component. Since the same applies to a coming from the opening 16 air flow, which are from the openings 16; 17 originating streams at least partially aligned opposite to each other and prevent removal of compressed air in a different way than through the opening 18.

Preferably, the slot-shaped opening 17 by at least two components 38; 39 formed, which are matched in shape to each other and which can be adjusted to each other during assembly and / or later in their relative position, for example, to influence a dimension of the opening 17. Each of these at least two components 38; 39 preferably has at least one area 46 extended in the direction A; 41 and / or edge and the relative position of these surfaces 46; 41 and / or edges of the two components 38; 39 determines an extension of the slot-shaped opening 17 in a direction that has at least one component in the transport direction B of the printing material 03. The width of the opening 17 is the smallest extent of the opening 17 in a direction perpendicular to the direction A is called. An extension of the opening 17 in the direction A is called the length of the opening 17. The opening 17 can preferably be adjusted analogously to the opening 16 in its width and has analog components, such as a seal and adjusting elements.

The component 39 is in the region of the opening 17 relative to the component 38 in FIG

Transport direction B of the substrate 03 arranged below. The component 39 has a preferably flat surface 41 which extends in the direction A perpendicular to

Transport direction B extends. The surface 41 closes with a plane H, the one

Tangentalen H to the substrate 03 and which is defined by a component 39 next cutting line of a straight line extension of the surface 41 with the substrate 03, an angle η a, preferably between 10 ° and 170 °, more preferably between 10 ° and 90 ° and even more preferably between 20 ° and 60 °. The surface 41 terminates in an at least one component on the substrate 03 facing direction at an edge 42. At this edge 42, the surface 41 and another, curved surface 43 abut each other. A tangent plane I to this curved surface 43 which extends through the edge 42 encloses with the flat surface 41 an angle φ which is preferably between 10 ° and 170 °, more preferably between 0 ° and 140 ° and more preferably between 90 ° and 130 °. The surface 43 is convexly curved in an area directly adjacent to the edge 42. One

The radius of curvature r43 of the curved surface 43 is preferably between 2.5 mm and 10 mm, more preferably between 3 mm and 6 mm. The curved surface 43 merges from the edge 42 into a concavely curved region 44 at a distance of 3 mm to 10 mm, preferably 5 mm to 8 mm. In this area 44 is the

The radius of curvature r44 of the curved surface 43 is preferably between 10 mm and 130 mm, more preferably between 15 mm and 60 mm and even more preferably between 20 mm and 30 mm.

The radius of curvature r44 is preferably at most as great as a radius of curvature r03 of the printing substrate 03 at a location of the printing substrate 03 closest to the area 44 of the surface 43. Such a radius of curvature r03 of the printing substrate 03 can again be determined, for example, by the roller 29 or looped around by the printing material 03 Cylinder 29 be set and is at least 20 mm, preferably at least 40 mm and in the case of a non-curved at this point substrate 03 may again be infinitely large. The curved surface 43 then preferably merges again in the transport direction B into the concave region into a convexly curved region, which in turn merges into a boundary wall 49 of the exhaust air chamber 37 and has a minimum radius of 1.5 mm.

Preferably, the dryer 04 is characterized by the fact that a location of the component 24 closest to the printing material 03; 39 of the dryer 04 is a part of a convexly curved, between the at least one outlet opening 16; 17 and the at least one inlet opening 18 arranged surface 28; 43 of the component 24; 39 is.

Furthermore, the dryer 04 is preferably characterized in that a the

Printing substrate 03 nearest point of a component 24; 39 of the dryer 04 a part of a surface 28; 43, which extends between the at least one outlet opening 16; 17 and the at least one inlet opening 18 is formed extending and which has a concave curved portion 44 which in two directions with respect to a

Transport direction B of the substrate 03 is formed in each case transient in a convex region.

The printing material 03 is at its closest to the component 39 in one place

Drying operation preferably arranged between 0.05 mm and 10 mm away from the component 39, more preferably between 0.1 mm and 6 mm. Preferably, a smallest distance between the dryer 04 and the printing material 03 is between 0.05 mm and 10 mm, more preferably between 0.1 mm and 6 mm. A smallest distance between substrate 03 and dryer 04 is automatically also a smallest distance between substrate 03 and at least one component of the dryer 04th

The component 38 has a preferably flat surface 46, whose shape is more preferably adapted to the shape of the surface 41 of the component 39, so that the gap-shaped opening 17 is formed by the surfaces 41 and 46. In the region of the edge 42 of the component 39, the component 38 likewise has an edge 47. Adjacent to the surface 46, another surface 48 of the component 38 adjoins this edge 47. While the component 39 fills the acute or obtuse angle φ between the surface 41 and the tangent plane I, the component 38 fills in a superficial angle between the surface 46 and the surface 48. This obtuse angle represents an outer angle. The associated inner angle is the angle λ and preferably deviates by less than 20 ° from the Whkel φ, more preferably the angles λ and φ are the same size. The surface 48 extends in each direction perpendicular to the direction A preferably only over less than 2 mm, more preferably over 0.1 mm to 0.5 mm. It is part of a nose which encloses the edge 42 of the component 39. This nose protrudes preferably with respect to the curved surface 43 by less than 2 mm in a direction which is defined by a shortest connection between the edge 42 and the substrate 03. Preferably, no component of the component 38 has a smaller distance to the

Stock 03, as this nose. In this way, it is possible to guide the printing material 03 as close as possible to the region 44 of the curved surface 43 or even along the curved surface 43 of the component 39, without the component 38 or the component 39 coming into contact with the printing material 03 , The opening 17, which extends between the components 38 and 39 as described, is therefore directed onto the printing substrate 03 at least with one component. In the end region of the opening 17, this opening 17 preferably has a width, that is to say a smallest extent, which lies between 0.01 mm and 0.5 mm, preferably between 0.1 mm and 0.3 mm. The direction in which the opening 17 points, is defined as the central direction of the two pointing to the opening 17 directions of the two opposite surfaces, the opening 17 in its end region bounding surfaces and is preferably perpendicular to the direction A and the width of the opening 17th

The at least one opening 17 is connected to a pressure chamber 51, which in turn like the pressure chamber 21 with the interposition of a compressed air unit, the

For example, the same compressed air unit 07 may be as described above, connected to a compressed air source 08, for example in an analogous manner as described above and / or to the same compressed air source 08 as described above. The at least one opening 17, like the at least one opening 16, is preferably slit-shaped and it is also possible to arrange a plurality of slit-shaped openings 17 arranged one behind the other along their length. Preference is also the

Pressure chamber 51 supplied via more than one supply line with compressed air, so that a pressure in the interior of the pressure chamber 51 is as constant as possible over its extent.

Preferably prevails in the drying operation in the pressure chamber 51, a pressure of 2 bar to 7 bar, more preferably from 3 bar to 5 bar.

The opening 18 is at least substantially in and against the transport direction B through the components 24 and 39 and in particular by the boundary walls 36; 49 limited. Limits of the opening 18 in the direction A may be designed as further components or preferably as corresponding extensions of the components 24 and 39. The exhaust air chamber 37 is preferably equipped with a plurality of air guide elements 52 which have surfaces which are for example at an angle of 30 ° to 60 ° to the direction A and substantially parallel to the transport direction B of the printing material 03 and ensure that air , which flows into the exhaust chamber 37, is deflected in a direction toward an exhaust duct 53. In this way, a damming of abzutransportierenden air in the exhaust chamber 37 is prevented and it is ensured that prevail as uniform pressure conditions in the exhaust chamber 37. From the exhaust duct 53, the discharged air is removed, in order then to be further processed accordingly. If it's just wet air, it can

For example, be easily passed from a dryer 04 containing building. Other gases are used and / or dried

Solvent removed, so is a corresponding preparation and / or

Deposition plant arranged. Filters for separating dust and particles or heat recovery systems may also be arranged. In the field of exhaust ducts can continue to use conventional methods, such as

For example, admixture of fresh air to avoid the risk of explosion and arrangement of sensors for monitoring the exhaust air composition.

By matched radii of curvature, for example, the surfaces 28; 43 and the roller 29 and the cylinder 29, it is ensured that areas with a minimum distance between substrate 03 and dryer 04 are such areas in which air in each case in one direction from an outlet opening 16; 17 flows to the inlet opening 18 to. The air flows in a similar manner to an airfoil on the curved surfaces 28; 43 along. At least one surface 28 is preferred; 43 and further are all such surfaces 28; 43, the next to the substrate 03 arranged components 24; 39 of the dryer 04 limit at least in the area closest to the dryer 04 as convex surfaces 28; 43 trained. Through this Flow is already partially taken care of itself that the air to be transported away from the substrate 03, but preferably a suction device is additionally arranged, which provides a negative pressure in the exhaust chamber 37, for example, an absolute pressure of 50 mbar to 500 mbar (5 kPa up to 50 kPa), thus ensuring safe removal of the air. When combustible solvents are used, such a suction device is always arranged to prevent explosive vapors or gas mixtures from forming and / or remaining in the printing press. The by the geometry of the openings 16; 17; 18 and the curved surfaces 28; 43 resulting passive suction effect is thus supported by an active extraction.

It is also conceivable that the openings 16 and 17 mirror-inverted, but otherwise performed the same, either in an embodiment as has been described for the opening 16 or in an embodiment as has been described for the opening 17. Accordingly, then the components 24 and 39 and 23 and 38 are each mirrored and otherwise the same design. In this case, mirror-inverted and otherwise the same interpretation so that not all dimensions exactly match, but especially the relative position of components 23; 24; 38; 29 and / or openings 16; 17; 18 and or bends of corresponding surfaces 26; 27.2; 31; 33; 41; 43; 46; 48 and / or their areas 44 and / or relative positions of edges 27; 27.1; 32; 42; 47

In principle, it is also possible to arrange at least one heater 22 in a supply line of compressed air to the pressure chamber 51 or to arrange heaters 22 only on supply lines to the pressure chamber 51 and not to supply lines to the pressure chamber 21. Preferably, the heaters 22 are controlled separately from each other. This means that heaters 22, with different, but possibly to a same pressure chamber 21; 51 associated intermediate lines interact, separated and independent

are controllable from each other and / or that heaters 22, with to a Pressure chamber 21 associated intermediate lines cooperate, can be controlled separately from heaters 22, which cooperate with, another pressure chamber 51 associated, intermediate lines.

In one embodiment, one of the pressure chambers 21; 51 or both

Pressure chambers 21; 51 along the direction A perpendicular to the transport direction B of the printing substrate 03 into a plurality of pressure chambers 21; Subdivided 51, which are each acted upon separately from each other with compressed air and / or their respective supply lines are heated separately by means of heaters 22.

Air coming out of the openings 16; 17 has a speed of up to 400 m / s and possibly also above, but preferably between 100 m / s and 250 m / s. Their temperature is preferably between 60 ° C and 250 ° C. Depending on the printing ink used, the temperature is more preferably, for example, between 60 ° C and 130 ° C for water-based inks and between 200 ° C and 250 ° C for oily inks. Due to the very short exposure time, the penetration depth of this high temperature into the printing substrate 03 and / or the printing inks is relatively low, so that moisture or oils to be removed are vaporized, but the printing material 03 is not critically heated and, in particular, not subsequently cooled or rewetted must become. By the heaters 22 heated air is indeed while flowing through the

Pressure chamber 21; 51 and the slot-shaped opening 16; 17 is partially cooled, with the heaters 22 described this temperature range but easily accessible. Components of the dryer 04, which come into contact with the heated air, such as the intermediate lines, the pressure chambers 21; 51 limiting components and especially the components 23; 24; 38; 39 are preferably made of a temperature-stable material or at least coated therewith, such as heat-resistant stainless steel, ceramic, anodized aluminum or the like. The heated air, which is cooled by expansion, evaporation of moisture, contact with colder components of the dryer 04 and the like from the temperature generated by the heaters 22 is at Removal significantly colder than directly after the heaters 22, which is particularly relevant for solvents whose explosion hazard must be considered. Due to the very short time during which each location of the printing material 03 is influenced by the hot air, the printing material 03 is not heated or dried out in a detrimental manner and, in particular, there is no risk of overheating of the printing substrate 03 / or rewet the substrate 03 necessary. Shrinkage of the printing material 03 are thereby avoided.

In case of an unforeseen event, such as a machine stop or a web break in web-like substrate 03 or even in a

Scheduled machine stop, for example for a printing plate change, a

To avoid malfunction, the dryer 04 from a drying operating position, ie the first operating state at least in a maintenance position, ie a second operating state movable, for example pivotable and / or linearly movable, which is characterized in that a minimum distance between the dryer 04 and the printing substrate 03 or another relevant, for example, heat-sensitive component of the printing press is increased and at least 20 mm, preferably at least 75 mm and more preferably at least 150 mm. Preferably, the dryer 04 is also in an emergency position, so a third operating state movable, for example, pivotable and / or linearly displaceable, in which the distance between the dryer 04 and the substrate 03 or another component of the printing press

possibly smaller than in the maintenance position, in which the dryer 04 but especially fast from the drying operating position can be transferred, for example, in a malfunction of the printing press and / or the dryer 04 mentioned.

The length of the openings 16; 17 depends on how wide the one to be dried

Substrate 03 or area of the printing substrate 03 in the direction A is perpendicular to the transport direction B. There are widths of the substrate 03 and thus lengths of the Openings 16; 17 of a few cm as possible, as widths of the substrate 03 and lengths of the openings 16; 17 meters, for example, up to 4 meters in six-page wide newspaper presses. In principle, in the length of the openings 16; 17 and thus in the width of the printing material 03 but no limits, as well as several dryers 04 modular can be used in the direction A side by side. This is possible in particular by virtue of the fact that compressed air intended and used for drying is also transported away again via the dryer 04 and, given a suitable geometry of the exhaust air duct 53, no restriction of the length of the openings 16; 17 causes. The air guide elements 52 are then adapted accordingly, for example, because exhaust ducts 53 no longer run exactly in the direction A, but with a component in the direction A and with a component in a direction perpendicular thereto,

for example, in the transport direction B of the printing substrate. As a result, for example, exhaust ducts can be arranged aligned with a component in the direction A, while in the same position with respect to the direction A but slightly offset in or against the direction B already has a further opening 16; 17 is arranged. For relatively broad substrates to be dried 03 and especially when used

different widths of substrates to be dried 03 it is particularly recommended, instead of one opening 16; 17 each have a plurality, in the direction A one behind the other openings 16; 17 to be arranged, each separately activated, d. H. be acted upon with compressed air. As a result, substrates 03 less than the maximum possible width can be dried, without compressed air escaping and / or heated on the entire width of the dryer 04. Thus, for example, energy consumption can be optimized. As already described can by means of

Different control of the heaters 22 and the intermediate lines over the width of the substrate 03 also with different temperatures and / or

different pressure air streams over the width of the

Substrate 03 to be worked. The length of the opening 18 and a number of openings 18 arranged one behind the other in the direction A preferably depend on the number and arrangement of the openings 16; 17, so that it is certain that all supplied air can also be transported away again and that with variable use in the width of the printing substrate 03, the openings 18 can be used variably.

In addition to the drying effect of the dryer 04 by increased convection and

Breaking the laminar layer is due to the geometry of the arrangement and the resulting flow of air still another effect. According to Paschen's law, a breakdown voltage in a capacitor depends on a product of a prevailing pressure p and an electrode spacing d. Due to the fact that charged particles or liquid droplets can adhere to the printing substrate 03, the substrate 03 on the one hand and the corresponding component 24; 39 on the other hand formed a capacitor. By a high flow velocity of the air between the "capacitor plates", so the substrate 03 and the corresponding component 24, 39 and associated low pressure of the flowing air and by a correspondingly small distance between the substrate 03 and the corresponding component 24; relatively low breakdown voltage can be achieved, for example a minimum of 340 V for a product of pressure p and electrode spacing d of 7.3 bar / m and air as gas between the capacitor plates.Thus, electrostatically adhering particles and / or droplets from the printing substrate can be applied to a substrate 03 03 discharge and thus be easily removed, which in addition to the further improved drying effect, for example, a dedusting of

Substrate 03 can serve. For example, particles that were previously bound to the printing substrate 03 by interaction with a more or less complete liquid film and that are only bonded to the printing substrate 03 after drying by electrostatic forces can be removed in this manner without having any separate facility would be necessary.

Conventional dryers 04, which indirectly dry only the laminar film and thereby the printing material 03, can not solve such a problem.

Flow directions and flow conditions of the air are through the top described embodiment of the components 24; 39 and in particular the curved surfaces 28; 43 influenced. In all embodiments of openings 16; 17, ie both in the embodiments described for the opening 16 and in which the outflowing air flows out substantially tangentially to a concave surface 28 from the opening 16, as well as in the embodiments to the opening 17th

is described and in which the outflowing air flows substantially tangentially to a convex surface 43, an angle at which the outflowing air to one, the respective opening 16; 17 delimiting surface 28; 43 from the opening 16; 17 flows out, less than 45 °, preferably less than 20 ° and more preferably less than 10 °. In the case of a convex surface 43, the outflowing air is guided along this surface 43 and strikes the printing substrate 03 almost or exactly tangentially. In this case as well as in the case where the air flows along a concave surface 28 out of the opening 16 exits, is an angle at which the outflowing air strikes the substrate 03 is less than 45 °, preferably less than 20 ° and water preferably less than 10 °. In this way, in particular, it is ensured that an angle that two air streams at their respective impact on an equal side of the printing material 03 include, one of which comes from the opening 16 and the other comes from the opening 17 is greater than 90 °, preferably greater than 120 ° and more preferably greater than 50 °.

As a result, flow and pressure conditions are created, which cause a particularly pronounced drying effect. Thus, the laminar, co-moving with the substrate 03 air layer is broken, in particular by turbulence and by turbulence and by the high exit velocity of the air and by the small width of the openings 16; 17 also small dimension of the air jet.

As a result, almost all of the compressed air used comes in contact with moisture and can absorb almost all of the compressed air used moisture. The compressed air preferably reaches the substrate 03 and dries it directly from. In this way, the absorption capacity of the compressed air with respect to moisture is utilized in a particularly large extent and a particularly effective use of compressed air is achieved. On reason effective drying of the substrate 03 during drying with

Speeds of up to 25 m / s are transported. Even at

A series of multiple dryer 04 is a space requirement only a fraction of what a conventional dryer would need.

The high air pressure and the associated high density of the compressed air cause supply lines of the compressed air require only a relatively small cross-section. This is reinforced by the fact that due to the comparatively better use of a maximum absorption capacity of the air with respect to

absorbed moisture and a total of comparatively less air mass must be used, as in a conventional dryer.

An arrangement is preferably characterized by the fact that it has the dryer 04 of the rotary printing press and the printing material 03, wherein the dryer 04 is arranged or can be arranged to act on the printing substrate 03 and / or on the printing material 03 located printing ink and / or lacquer and wherein the dryer 04, the at least one pressure chamber 21; 51, which is acted upon or acted upon by the pressurized gas or gas mixture and with the at least one outlet opening 16; 17 is in communication, wherein the at least one outlet opening 16; 17 is slit-shaped and has a smallest extension of 0.01 mm to 0.5 mm and arranged gas or gas mixture feeding the substrate 03 arranged or can be arranged and wherein the at least one inlet opening 18 gas or gas mixture from the substrate 03 transported away or can be arranged is and wherein the gas or gas mixture in the at least one

Pressure chamber 21; 51 in the first operating state has a temperature of at least 60 ° C.

Preferably, the arrangement is further characterized in that the angle, the one of the at least one outlet opening 16; 17 entstammender gas stream with the Substrate 03 is formed enclosing, smaller than 45 °.

Preferably, the arrangement is characterized further or alternatively by the fact that with respect to the transport direction B of the printing material 03 at least one outlet opening 16 is arranged on one side of the at least one inlet opening 18 and at least one outlet opening 17 is arranged on the other side of the at least one inlet opening 18.

Preferably, the arrangement is characterized further or alternatively by the fact that an angle between two directions is greater than 90 °, wherein the two directions are determined by a respective air flow in a respective impingement of the two air streams on a same side of the printing material 03, wherein a the air streams originate from the at least one outlet opening 16 and the other from the air streams originates from the at least one outlet opening 17.

Preferably, the arrangement is characterized further or alternatively by the fact that at least one, between the at least one outlet opening 16; 17 and the at least one inlet opening 18 arranged surface 28; 43 at least one component 24; 39 is at least partially concave curved.

Preferably, the arrangement is characterized further or alternatively by the fact that at least one surface 28; 43 at least one component 24; 39 between one

Outlet opening 16; 17 and a concave curved portion of the surface 28; 43 has a convex curvature.

Preferably, the arrangement is characterized further or alternatively by the fact that between the dryer 04 and the substrate 03, the gap is formed, of the substrate 03 and the dryer 04 and the two slit-shaped

Is limited openings and having an extension in each spatial direction, the at least twice as large as the smallest distance between substrate 03 and dryer 04.

Preferably, the arrangement is characterized further or alternatively by the fact that a plurality of intermediate lines gas or gas mixture in the at least one pressure chamber 21; 51 are arranged or arranged to be conductive and that at least one heater 22 is arranged along a plurality of these intermediate lines and that heaters 22 of different intermediate lines are independently controlled or controlled and / or operated. In particular, therefore, a plurality of intermediate lines gas or gas mixture in one or in each case a pressure chamber 21; 51 arranged conductive or can be arranged.

Preferably, the arrangement is further characterized or alternatively characterized in that a plurality of at least partially and preferably completely spaced in a direction with a component in a direction A arranged intermediate lines gas or gas mixture in the at least one pressure chamber 21; 51 are arranged conductive or can be arranged, wherein the direction (A) is perpendicular to a transport direction B of the printing substrate (03) and the printing material 03 is arranged to extend in the direction A.

Preferably, the arrangement is characterized further or alternatively by the fact that along at least one of these intermediate lines at least one heater (22) is arranged or can be arranged.

Preferably, the arrangement is characterized further or alternatively by the fact that in a direction A perpendicular to a transport direction B of the printing material 03rd

next to each other several pressure chambers 21; 51 are arranged, which are each acted upon separately and / or acted upon by pressurized gas or gas mixture. Preferably, the arrangement is characterized further or alternatively by the fact that at least in the first operating state, the smallest distance between dryer 04 and substrate 03 is between 0.05 mm and 10 mm.

Preferably, the arrangement is characterized further or alternatively by the fact that, at least in the first operating state, a location closest to the printing stock 03 of a component 24 closest to the printing stock 03; 39 of the dryer 04, a convexly curved part of a between the at least one outlet opening 16; 17 and the at least one inlet opening 18 arranged surface 28; 43 of the component 24; 39 is.

Preferably, the arrangement is characterized further or alternatively by the fact that a closest to the substrate 03 location of the substrate 03 nearest component 24; 39 of the dryer 04 a part of a surface 28; 43, which extends between the at least one outlet opening 16; 17 and the at least one inlet opening 18 is formed extending and which has a concave curved portion 44 which is formed in two directions with respect to a transport direction B of the printing substrate 03 each in a convex region.

LIST OF REFERENCE NUMBERS

01 printing unit

 02 coating unit

 03 substrate

 04 dryers

 05 -

06 supply line

 07 compressed air unit

 08 Compressed air source, compressor, container, gas bottle

09 pressure reducer

 10 -

1 1 filter, compressed air filter

 12 sensor

 13 entrance

 14 output

 15 -

16 opening; outlet opening

 17 opening; outlet opening

 18 opening; inlet opening

 19 opening

 20 -

21 pressure chamber

 22 Heating, heating cartridge, high-performance heating cartridge

23 component

 24 component

 25 -

26 area (24)

27 edge (24) Area (24)

Roller, cylinder - surface (23)

Edge (23)

Area (23)

Area (23)

- boundary wall (37) exhaust air chamber

component

component

- area (39)

Edge (39)

Area (39)

Area (43)

- area (38)

Edge (38)

Area (38)

Boundary wall (37) - pressure chamber

 Air baffle exhaust duct edge (24)

Area (24) A direction

B Transport direction (03)

E plane, tangent plane

F Tangent plane

H level, tangent plane

I Tangent plane r03 Radius of curvature (03) r28 Radius of curvature (28) r43 Radius of curvature (43) r44 Radius of curvature (44) α Angle

ß angle

γ angle

δ angle

η angle

φ angle

λ angle

Claims

claims 1 . Arrangement, comprising a dryer (04) of a rotary printing press and a printing material (03), wherein the dryer (04) on the substrate (03) and / or on the substrate (03) located printing ink and / or lacquer is arranged or can be arranged acting and wherein the dryer (04) has at least one pressure chamber (21, 51) which is acted upon or acted upon by a pressurized gas or gas mixture and which communicates with at least one outlet opening (16, 17), the at least one  Outlet opening (16; 17) is slit-shaped and has a smallest extension of 0.01 mm to 0.5 mm and arranged gas or gas mixture feeding the substrate (03) supplying or can be arranged and wherein at least one inlet opening (18) gas or gas mixture from the substrate (03)  is arranged to be transported away or can be arranged and wherein the gas or  Gas mixture in the at least one pressure chamber (21; 51) in a first  Operating state has a temperature of at least 60 ° C, characterized in that one of the at least one outlet opening (16; 17)  entstammender gas stream with the substrate (03) is formed an angle smaller than 45 ° including. 2. Arrangement according to claim 1, characterized in that with respect to a  Transport direction (B) of the printing substrate (03) at least one outlet opening (16) on one side of the at least one inlet opening (18) is arranged and at least one outlet opening (17) on the other side of the at least one inlet opening (18) is arranged. 3. Arrangement according to claim 2, characterized in that an angle between two directions is greater than 90 °, wherein the two directions are fixed by a respective air flow in a respective impact area of the two Air streams on a same side of the printing substrate (03), wherein one of the air streams of the at least one outlet opening (16) and the other of the air streams of the at least one outlet opening (17) comes from. 4. Arrangement according to claim 1, characterized in that at least one,  between the at least one outlet opening (16; 17) and the at least one inlet opening (18) arranged surface (28; 43) of at least one component (24; 39) is at least partially concave curved. 5. Arrangement according to claim 1, characterized in that at least one surface (28; 43) of at least one component (24; 39) between a discharge opening (16; 17) and a concavely curved part of the surface (28; 43) has a convex curvature having. 6. Arrangement according to claim 1, characterized in that between the  Dryer (04) and the substrate (03) a gap is formed, which is bounded by the substrate (03) and the dryer (04) and two slot-shaped openings and which has an extension in each spatial direction, which is at least twice as large like the smallest distance between substrate (03) and dryer (04). 7. Arrangement according to claim 1, characterized in that a plurality  Intermediate gas or gas mixture in the at least one pressure chamber (21; 51) are arranged or arranged and arranged that along at least one of these intermediate lines at least one heater (22) is arranged and heaters (22) of different intermediate lines independently controlled or controlled and / or operated are. 8. Arrangement according to claim 1, characterized in that a plurality, at least partially arranged in a direction with a component in one direction (A) spaced intermediate gas or gas mixture in the at least one pressure chamber (21; 51) are arranged or arranged to be conductive, wherein the direction (A) perpendicular to a transport direction (B) of the printing material (03) and the printing material (03) is arranged to extend in the direction (A). 9. Arrangement according to claim 8, characterized in that along at least one of these intermediate lines at least one heater (22) is arranged or can be arranged. 10. Arrangement according to claim 8, characterized in that along a plurality of these intermediate lines heaters (22) are arranged or can be arranged. 1 1. Arrangement according to claim 1, characterized in that in a direction (A) perpendicular to a transport direction (B) of the printing material (03) side by side a plurality of pressure chambers (21; 51) are arranged, which can be acted upon separately from each other with pressurized gas or gas mixture and / or acted upon. 12. Arrangement according to claim 1, characterized in that at least in the first operating state, a smallest distance between dryer (04) and  Substrate (03) is between 0.05 mm and 10 mm. 13. Arrangement according to claim 1, characterized in that at least in the first operating state, a smallest distance between dryer (04) and  Substrate (03) is between 0.1 mm and 6 mm. 14. Arrangement according to claim 1, characterized in that at least in the first operating state, the printing material (03) nearest point of a A convexly curved part of a surface (28, 43) of the component (24, 39) of the dryer (04) located between the at least one outlet opening (16, 17) and the at least one inlet opening (18) is located next to the printing material (03). 24, 39). 15. Arrangement according to claim 1, characterized in that a printing material (03) nearest point of the printing material (03) nearest component (24; 39) of the dryer (04) is a part of a surface (28; is formed between the at least one outlet opening (16; 17) and the at least one inlet opening (18) and which has a concavely curved area (44) which in two directions relative to a transport direction (B) of the printing material (03) in each case is formed transiently a convex portion.