EP2714409B1 - Printing machine - Google Patents

Description

The invention relates to a printing machine according to the preamble of claim 1.

Various printing methods are known which can be used in rotary printing machines. One such printing method is ink jet printing or ink jet printing. In this case, individual ink drops are ejected from nozzles of printheads and transferred to a substrate, that results in a print image on the substrate. By individual control of a plurality of nozzles so different print images can be created. There is no fixed printing form and thus it is possible to design each individual print product individually. As a result, personalized printed products can be produced and / or small runs of printed products can be produced at low cost due to the saving of the printing forme.

An exact match of a print image on the front and back of a printed substrate printed on both sides is called register (DIN 16500-2). Multi-color printing is called the Passer (DIN 16500-2), when individual print images of different colors are combined exactly to a picture. Also in the context of inkjet printing, appropriate measures must be taken to maintain register and / or register.

By the EP 2 202 081 A1 and the JP 2003-063707 A In each case, a printing press is known, wherein the printing press has a first printing unit and a dryer, wherein the first printing unit has a central cylinder with its own, the first central cylinder associated drive motor and at least one ink jet print head.

By the US 5 566 616 A For example, there is known a printing machine having a rotatable central cylinder, ink jet printheads, a cooling device, and a dryer which operates with either temperature and draft or radiation-induced crosslinking.

By the US 6 053 107 A a printing machine is known which has a driven central cylinder and a dryer with cooling device.

By the US 5 713 138 A a dryer is known which heats by means of radiation, a central roller from the inside, abuts the outside of a substrate and additionally having a system for flowing through a gap with air.

By the US 2002/166470 A1 and the US 5 566 616 A In each case, a printing press is known which has at least one first printing unit and at least one first dryer, wherein the at least one first printing unit has at least one inkjet printhead, at least one first central cylinder and its own first drive motor associated with the at least one first central cylinder, and wherein the at least one the first dryer is designed as a radiation dryer and wherein at least one first cooling device is arranged along a transport path of a printing material through the printing press after the at least one first dryer.

By the EP 0 870 613 A1 , the DE 10 2008 047 027 A1 and the EP 1 847 388 A2 In each case, a dryer of a printing press is known which is designed as a radiation dryer and which has at least one ventilation device which has at least one air supply line and at least one air discharge line.

By the US 2011/063389 A1 a printing machine is known which has at least one first printing unit and at least one first dryer, wherein the at least one at least one first dryer has at least one ventilation device, which has at least one air supply line and at least one air discharge line and wherein the transport path of the printing material through an area of action of the at least one first dryer at least 75% in at least one direction with greater vertical than any existing horizontal component runs.

The invention has for its object to provide a printing press.

The object is achieved by the features of claim 1.

The achievable with the present invention consist in particular that high-quality printing results can be achieved in a compact design. In particular, by arranging appropriate dryer and cooling devices can be provided on short transport routes for drying a substrate and in particular a printing material. Short transport routes avoid difficulties with the register and / or the register and a lot of white waste is kept low. By appropriate arrangements of printing units and dryers smearing already printed images can be avoided. By a preferred arrangement of a dryer unit with two dryers accessibility of printing units and dryers is improved and provided for an optimized transport of the substrate and in particular the substrate web. A preferred use of at least one radiation dryer improves energy efficiency, in particular in the Case of an infrared radiation dryer. This is preferably reinforced by a combination of radiation dryer and flow dryer. For this purpose, at least one ventilation device is preferably arranged on the at least one dryer.

Another advantage is that a web tension of the printing material web can be regulated particularly well. This results, for example, by a preferred plurality of driven rotary bodies and corresponding impression rollers, which are in contact therewith. The so preferably regulated web tension ensures, in addition to avoiding web breaks and / or hangers for an improvement of register and / or register, since strains of the printing material directly depend on the forces acting on the printing substrate forces. For example, at least one central cylinder and / or at least one chill roll press are used as such rotary bodies.

A further advantage is that a particularly precise positioning of the printing substrate and in particular of the printing material web relative to one or more central cylinders is possible and thereby a printed image can be printed particularly precisely, ie register and / or register can be improved.

An embodiment of the invention is illustrated in the drawings and will be described in more detail below.

Fig. 1

eine schematische Darstellung einer Rollen-Rotationsdruckmaschine;

Fig. 2

eine schematische Darstellung eines Teils einer Druckeinheit mit einer Doppelreihe von Druckköpfen;

Fig. 3

eine schematische Darstellung eines Teils eines Trockners;

Fig. 4

eine schematisch vergrößerte Darstellung eines Bereichs der Fig. 3;

Fig. 5

eine schematische Darstellung einer Bedruckstoffbahn und mehrerer Strahlungsquellen eines Trockners.

Show it:

Fig. 1

a schematic representation of a web-fed rotary printing machine;

Fig. 2

a schematic representation of a portion of a printing unit with a double row of printheads;

Fig. 3

a schematic representation of a portion of a dryer;

Fig. 4

a schematic enlarged view of a portion of the Fig. 3 ;

Fig. 5

a schematic representation of a printing substrate and multiple radiation sources of a dryer.

A printing machine 01 embodied as a rotary printing machine 01 and / or as a roll printing machine 01 has at least one printing material source 100, at least one first printing unit 200, at least one first dryer 301, preferably at least one second printing unit 400 and at least one post-processing device 500. The printing machine 01 is also preferably designed as an inkjet printing machine 01, in particular as a roller inkjet printing machine 01. Preferably, the printing machine 01 is designed as a roller printing machine 01 or roller rotary printing machine 01. In this case, the printing material source 100 is designed as a roll-off device 100. In the case of a sheet-fed printing press or sheet-fed rotary printing press, the printing material source 100 is designed as a sheet feeder. In the printing material 100 substrate 02 is aligned, preferably with respect to at least one edge of the substrate 02. In the Rollenabspulvorrichtung 100 a roll printing machine 01 is a web-shaped substrate 02, so a printing substrate 02, for example, a paper web 02 or a textile web 02 or a film 02, for example, a plastic film 02 or a metal foil 02 unwound from a Bedruckstoffrolle 101 and preferably aligned with respect to their edges. Subsequently, the printing material 02 and in particular the printing substrate 02 is passed through the at least one first printing unit 200, where the printing substrate 02 and in particular the printing substrate 02 is provided by at least one ink at least one side and preferably two sides with a printed image.

After passing through the at least one first printing unit 200 passes through the Substrate 02 and in particular the printing substrate 02, the at least one first dryer 301 to dry the applied ink. Under printing ink is to be understood in the foregoing and hereinafter generally a coating agent, in particular a paint. Preferably, the at least one first dryer 301 is part of a dryer unit 300. After passing through the at least one first dryer 301 and preferably the at least one second printing unit 400 and / or at least one second dryer 331, the printing substrate 02 and in particular the printing material web 02 is preferably at least a post-processing device 500 is supplied and further processed there. The at least one post-processing device 500 is designed, for example, as at least one folding device 500 and / or as a winding device 500. In the at least one folding device 500, the printing material 02, which is preferably printed on two sides, is processed further to form individual printed products. In particular, this means that at least the first dryer 301 and then preferably at least the second printing unit 400 and then preferably the at least one second dryer 331 are arranged along a transport path of the printing substrate 02 and in particular of the printing substrate 02 by the printing press 01 after the at least one first printing unit 200 is. This ensures that a double-sided printing of the printing substrate 02 and in particular the printing material web 02 is made possible in high quality.

Hereinafter, a roll printing machine 01 will be described in more detail. Corresponding details can, however, also be transferred to other printing machines 01, for example sheet-fed printing machines, provided that they do not contradict this. Bedruckstoffrollen 101, which are preferably used in the Rollenabspulvorrichtung 100 used, preferably each have a sleeve on which the web-shaped substrate 02 is wound for use in the roll printing machine 01. The printing material web 02 preferably has a width of 700 mm to 900 mm, but may also have an arbitrarily smaller or preferably larger width. In the Rollenabspulvorrichtung 100 at least one Bedruckstoffrolle 101 is rotatable arranged. In one embodiment, the Rollenabspulvorrichtung 100 is adapted to receive a Bedruckstoffrolle 101 suitably, thus has only one storage position for a Bedruckstoffrolle 101. In another embodiment, the Rollenabspulvorrichtung 100 is formed as a reel changer 100 and has storage positions for at least two Bedruckstoffrollen 101 and preferably allows a flying reel change, ie connecting a first substrate web 02 a currently processed Bedruckstoffrolle 101 with a second substrate web 02 a subsequently processed Bedruckstoffrolle 101, while both the currently processed Bedruckstoffrolle 101, as well as the subsequently to be processed Bedruckstofreolle 101 rotate.

The roll-off device 100 has at least one clamping device 103 per storage position, which is preferably designed as two clamping mandrels 103 or clamping cones 103 or a clamping shaft 103. The at least one tensioning device 103 serves to rotatably fasten at least one printing-material roller 101. The at least one tensioning device 103 is preferably drivable and / or driven by at least one or in each case one drive motor 104. This at least one drive motor 104 of the at least one tensioning device 103 is preferably connected to the one or more tensioning mandrels 103 via at least one belt 106, for example a toothed belt 106. The at least one tensioning device 103 and / or its drive motors 104 are preferably connected via a respective support arm 107 to a preferably common axle 108 or to a common support 108 or to a common support frame 108 around which all storage positions are rotatably arranged. As a result, the at least one printing material roll 101 is at a fixing of the at least one Bedruckstoffrolle 101 in the Rollenabspulvorrichtung 100 and / or removing a residual or residual role of Bedruckstoffrolle 101 from the Rollenabspulvorrichtung 101 and / or in a flying role change and / or in a current printing operation adaptable with decreasing roll diameter with respect to a position of its axis of rotation 111 and its lateral surface.

In order to be able to clamp a printing material roll 101 onto the at least one clamping device 103, in the case of clamping mandrels 103 at least one of the clamping mandrels 103 is preferably displaceable in each case and both clamping mandrels 103 in and / or against an axial direction A. This axial direction A is arranged parallel to the axis of rotation 111 of the printing material roll 101 and, if appropriate, to a pivot axis 109 of the common axis 108 or of the common carrier 108 or of the common carrier frame 108 of the roll-off device 100. This means that the axial direction A is at the same time a direction A of the width of the printing material web 02. In the following, the case of mandrels 103 will be described, wherein nevertheless all descriptions can also be applied to the at least one tensioning device 103 in general. The rotational axis 111 of the printing material roll 101 is at the same time the rotation axis 111 of the clamping mandrels 103 in contact with the respective printing material roll 101 in a aufgeachsten state of the Bedruckstoffrolle 101. The mandrels 103 preferably each have at least two driving elements designed as clamping jaws. The mandrels 103 further each have a support pin, with which the clamping jaws are preferably movably connected. The clamping jaws are variable in their position, at least in the radial direction with respect to a rotation axis 111 of the mandrels 103, which coincides with the axis of rotation 108 of the printing material roll 101. In a free operating state of the jaws all components of the jaws are within a radius determined by a maximum radial dimension of the trunnion and in a tensioned operating state of the jaws parts of the jaws are outside this radius.

The Rollenabspulvorrichtung 100 preferably further comprises a carrier 108 supporting the frame 112 and preferably on a dancer lever 121 deflectable dancer roll 113, by means of which a web tension is adjustable and durable within certain limits and / or held and compensated by the unevenness of the web tension, for example with non-circular printing material rollers 101. Optionally, the Rollenabspulvorrichtung 100 has an adhesive and cutting device by means of a role change flying, ie can go without stopping the printing material 02 vonstatten.

The Rollenabspulvorrichtung 100 further includes a Bahnkantenausrichter 114, which is also called Web Aligner 114. This Bahnkantenausrichter 114 has at least two aligned at least substantially and preferably exactly parallel alignment rollers 116 which are wrapped in a printing operation of the printing substrate 02 and their axes of rotation individually and / or jointly in their respective angular position in space and / or to a transport direction of Printing material 02 are changeable. For this purpose, both alignment rollers 116 are preferably arranged on a frame and can be pivoted together about a pivot axis, which is oriented perpendicular to a plane which contains the axes of rotation of the alignment rollers 116. By means of the web edge aligner 114, the printing material web 02 is aligned in its lateral position, that is, a position of its web edges is aligned with respect to the direction A of their width, which is orthogonal to the transport direction of the printing material 02. For this purpose, the at least two alignment rollers 116 are aligned as a result of measuring signals of at least one sensor such that a position of the aligning rollers 116 wrapped around the printing substrate 02 with respect to the direction orthogonal to the transport direction of the printing substrate 02 can be controlled within very short periods. For longer-term tendency tendencies of the printing material web 02, the entire printing material roll 101 is preferably moved in the direction of its axis of rotation 111. For example, for better space utilization, the web edge aligner 114 is preferably arranged above the support arms 107 of the reel unwinding device 100. Following the web edge aligner 114, there is at least one tension roller 118, with which a tension press 117 is cooperatively arranged. The draw roller 118 and the Zuggpresseur 117 form a feed nip 119, in which the printing material 02 is preferably clamped and through which the printing material 02 is preferably conveyed. The intake nip 119 serves to regulate a web tension. The Zugpresseur 117 preferably has a lateral surface which consists of an elastic material, for example an elastomer.

A first printing unit 200 is downstream of the Rollenabspulvorrichtung 100 with respect to the transport path of the printing substrate 02. The first printing unit 200 has at least one first central pressure cylinder 201 or, shortly, central cylinder 201. The printing substrate 02 wraps around the first central cylinder 201 at least partially in the printing operation. In this case, a wrap angle is preferably at least 180 ° and more preferably at least 270 °. The wrap angle is the angle measured in the circumferential direction of a cylinder jacket surface of the first central cylinder 201, along which the printing substrate 02 and in particular the printing substrate 02 is in contact with the first central cylinder 201. Accordingly, at least 50% and more preferably at least 75% of the cylinder jacket surface of the first central cylinder 201 are in contact with the printing material web 02 when viewed in the circumferential direction. This means that a partial area of a lateral surface of the at least one first central cylinder 201 provided as the contact surface between the at least one first central cylinder 201 and the printing substrate 02, which is preferably designed as printing substrate 02, has the wrap angle around the at least one first central cylinder 201, which is preferably at least 180 ° and more preferably at least 270 °.

Along the transport path of the printing material web 02 in front of the first central cylinder 201 of the first printing unit 200, a first printing material cleaning device 202 or web cleaning device 202 is arranged to act on the printing material web 02 and / or aligned with the transport path of the printing material web 02. The first web cleaning device 202 is preferably designed as a first dedusting device 202. The first web cleaning device 202 preferably has at least one brush and / or at least one suction device and / or device for the electrostatic discharge of particles adhering to the printing substrate web 02. The first web cleaning device 202 is assigned to at least one first side and preferably both sides of the printing material web 02 and in particular aligned at least on this first side of the printing substrate 02 and preferably on both sides of the printing substrate 02 acting and / or effective. Preferably, along the transport path of the printing material web 02 between the at least two alignment rollers 116 having Bahnkantenausrichter 114 and the at least one first central cylinder 201 of the pull roller 118 and the Zugpresseur 117 formed feed nip 119 is arranged. The at least one first web cleaning device 202 is arranged in a preferred embodiment along the transport path of the printing material web 02 after the drawing-in gap 119 and before the first central cylinder 201 acting on the printing substrate 02 and / or aligned with the transport path of the printing substrate 02.

A roller 203 of the first printing unit 200 formed as a first deflecting roller 203 is arranged parallel to the first central cylinder 201. This first guide roller 203 is arranged at a distance from the first central cylinder 201. In particular, there is a first intermediate space 204 between the first deflecting roller 203 and the first central cylinder 201, which is greater than a thickness of the printing material web 02. Under the thickness of the printing material web 02, a smallest dimension of the printing material web 02 is to be understood. The printing material web 02 preferably wraps around a part of the first deflecting roller 203 and is deflected by the latter in such a way that the transport path of the printing material web 02 in the first intermediate space 204 is both tangential to the first deflecting roller 203 and tangential to the first central cylinder 201. A lateral surface of the deflection roller 203 preferably consists of a comparatively inelastic material, more preferably a metal, even more preferably steel or aluminum.

Preferably, at least one cylinder 206 designed as the first impression roller 206 is arranged in the first printing unit 200. The first impression roller 206 preferably has one Shell surface, which consists of an elastic material, such as an elastomer. The first impression roller 206 is preferably adjustable by means of a Anstellantriebs to the first central cylinder 201 and / or disposed thereof, further preferably in a linear direction of movement, even more preferably radially relative to a rotation axis 207 of the first central cylinder 201. In one of the first central cylinder 201 employed state forms the first impression roller 206 together with the first central cylinder 201, a first impression gap 209. The printing substrate 02 passes through the first impression gap 209 in printing operation. By the first guide roller 203 and / or preferably by the first impression roller 206, the substrate web 02 is flat and preferably applied in a unique and known position to the first central cylinder 201. Preferably, apart from the first impression roller 206, no further rotation body, in particular no further roller, and no further cylinder is in contact with the at least one central cylinder 201.

The first central cylinder 201 has its own first drive motor 208 assigned to the first central cylinder 201, which is preferably designed as an electric motor 208 and which is further preferably designed as a direct drive 208 and / or individual drive 208 of the first central cylinder 201. A direct drive 208 is to be understood as meaning a drive motor 208 which is in torque transmitting and / or transferable connection without the interposition of further rotational bodies in contact with the printing material 02 with the at least one first central cylinder 201. A single drive 208 is to be understood as a drive motor 208, which is designed as the drive motor 208 exclusively of the at least one first central cylinder 201. The first drive motor 208 of the first central cylinder 201 is preferably designed as a synchronous motor 208. Nevertheless, the use of an asynchronous motor is conceivable. The first drive motor 208 of the first central cylinder 201 preferably has at least one permanent magnet, which is more preferably part of a rotor of the first drive motor 208 of the first central cylinder 201. On the first drive motor 208 of the first central cylinder 201 and / or on the first central cylinder 201 itself is a arranged first rotation angle sensor, which is a rotational angular position of the first drive motor 208 and / or the first central cylinder 201 itself measuring and / or measuring and sending to a higher-level machine control and / or sendable. The first rotation angle sensor is designed, for example, as a rotary encoder or absolute value encoder. With such a rotation angle sensor, a rotational position of the first drive motor 208 and / or preferably a rotational position of the first central cylinder 201 is preferably determined absolutely by means of the higher-level machine control. The first drive motor 208 of the first central cylinder 201 is preferably arranged on a first axial end of the first central cylinder 201, which is related to the axis of rotation 207 of the first central cylinder 201, while the rotational angle sensor preferably is located on a second axial end, which is related to the axis of rotation 207 of the first central cylinder 201 of the first central cylinder 201 is arranged. The rotation angle sensor preferably has a particularly high resolution, for example a resolution of at least 3,000 (three thousand) and preferably at least 10,000 (ten thousand) increments per full angle (360 °). The rotation angle sensor preferably has a high sampling frequency.

Within the first printing unit 200, at least a first printing unit 211 is arranged. The at least one first printing unit 211 is preferably arranged in the direction of rotation of the first central cylinder 201 and thus along the transport path of the printing substrate 02 after the first impression roller 206 acting on the central cylinder 201 and / or capable of acting and / or aligned. The at least one first printing unit 211 is formed as a first inkjet printing unit 211 and is also called first inkjet printing unit 211. The first printing unit 211 has at least one nozzle bar 213 and preferably a plurality of nozzle bars 213. The at least one first printing unit 211 and thus the at least one first printing unit 200 has at least one first printing head 212, which is designed as an inkjet printing head 212. Preferably, the at least one nozzle bar 213 has at least one and preferably a plurality of print heads 212. Each printhead 212 preferably has a plurality of Nozzles from which ink droplets are expelled or expelled. A nozzle bar 213 is a component which preferably extends over at least 80% and more preferably at least 100% of a width of the printing material web 02 and / or an axial length of the bale of the first central cylinder 201 and serves as a carrier of the at least one print head 212. In this case, a single or several nozzle bars 213 per printing unit 211 are arranged. Each nozzle is associated with a clearly defined target area in the direction A of the width of the printing material web 02 and thus with respect to the direction A of the axis of rotation 207 of the first central cylinder 201. Each target area of a nozzle is clearly defined, in particular with respect to the circumferential direction of the first central cylinder 201.

The at least one first nozzle bar 213 extends in the axial direction A, ie in the direction A of the width of the printing material web 02 over the entire width of the printing material web 02. The at least one nozzle bar 213 has at least one row of nozzles. The at least one row of nozzles, viewed in the axial direction A, preferably has nozzle openings at regular intervals over the entire width of the printing material web 02 and / or a bale of the first central cylinder 201. In one embodiment, for this purpose, a single continuous print head 212 is arranged, which extends in the axial direction A over the entire width of the printing material web 02 and / or the entire width of the bale of the first central cylinder 201. In this case, the at least one row of nozzles is designed as at least one linear, over the entire width of the printing material 02 in the axial direction A extending juxtaposition of individual nozzles. In another embodiment, a plurality of print heads 212 are arranged next to one another on the at least one nozzle bar 213 in the axial direction A. Since usually such individual print heads 212 are not provided with nozzles up to an edge of their housing, preferably at least two, and more preferably exactly two, rows of print heads 212 extending in the axial direction A are arranged offset relative to one another in the circumferential direction of the first central cylinder 201, preferably so that in axial Direction A consecutive printheads 212 always alternately belong to one of the at least two rows of printheads 212, preferably always alternately a first and a second of two rows of printheads 212. Two such rows of printheads 212 form a double row of printheads 212. Each double row of printheads 212 preferably has between five and fifteen printheads 212 and more preferably seven printheads 212. The at least one row of nozzles is then not formed as a single linear juxtaposition of nozzles, but results as a sum of individual, in particular two, in the circumferential direction offset from each other arranged juxtaposition of nozzles.

If a print head 212 has a plurality of nozzles, then all target areas of the nozzles of this print head 212 together form a working area of this print head 212. Working areas of print heads 212 of a nozzle bar 213 and in particular a double row of print heads 212 adjoin one another and / or overlap in the axial direction A. seen in the axial direction A. In this way, even when the print head 212 is not continuous in the axial direction A, target areas of nozzles of the at least one nozzle bar 213 and / or in particular of each double row of print heads 212 are located at regular and preferably periodic intervals in the axial direction A. In any case, an entire working area of the at least one nozzle bar 213 preferably extends over at least 90% and more preferably 100% of the total width of the printing substrate 02 and / or the entire width of the bale of the first central cylinder 201 in the axial direction A. Both sides with respect to the axial direction A, a narrow region of the printing material 02 and / or the bale of the first central cylinder 201 may be present, which does not belong to the working area of the nozzle bar 213. An entire working area of a double row of print heads 212 corresponds in the direction A to the width of the printing material web 02 to the working area of the at least one nozzle bar 213.

The at least one nozzle bar 213 preferably has a plurality of rows of nozzles in the circumferential direction with respect to the at least one first central cylinder 201. Preferably, each printhead 212 has a plurality of nozzles arranged in a matrix of a plurality of rows in the axial direction A and / or a plurality of columns in the circumferential direction of the at least one first central cylinder 201. Preferably, in a direction orthogonal to the axial direction A, a plurality of rows of printheads 212, more preferably four double rows, and more preferably eight double rows of printheads 212, are sequentially arranged. More preferably, in the circumferential direction with respect to the at least one first central cylinder 201 a plurality of rows of printheads 212, more preferably four double rows and still more preferably eight double rows of printheads 212 arranged successively aligned on the at least one first central cylinder 201. In this case, the print heads 212 are preferably aligned in such a way that the nozzles of each print head 212 point in the radial direction onto the cylinder jacket surface of the at least one first central cylinder 201. This means that the at least one print head 212 aligned with the lateral surface of the at least one first central cylinder 201 is aligned with the rotational surface 207 of the at least one first central cylinder 201 in a radial direction on the lateral surface of the at least one first central cylinder 201. In this case, this radial direction is a radial direction relative to the axis of rotation 207 of the at least one first central cylinder 201. Each double row of printheads 212 is preferably associated with an ink of a particular color, for example one of the colors black, cyan, yellow and magenta or a varnish, for example a clear varnish. The corresponding inkjet printing unit 211 is preferably formed as a four-color printing unit 211 and allows a one-sided four-color printing of the printing substrate 02. It is also possible to print fewer or more different colors with a printing unit 211, for example, additional spot colors. Preferably, correspondingly more or fewer printheads 212 and / or double rows of printheads 212 are arranged within this corresponding printing unit 211. In one embodiment, several Series of printheads 212, more preferably four double rows and still more preferably eight double rows of printheads 212 arranged successively aligned on at least one surface of at least one transfer body, for example at least one transfer cylinder and / or at least one transfer belt.

The at least one print head 212 preferably works to generate drops of ink by the drop-on-demand method. In principle, it is also conceivable to use print heads 212 which work according to another method for producing drops of ink, for example the continuous-ink-jet process. In the drop-on-demand process, ink droplets are selectively generated as needed. Preferably, at least one piezo element is used per nozzle, which can reduce a volume filled with ink at high speed by a certain amount when a voltage is applied. This displaces ink which is ejected through a nozzle connected to the volume filled with ink and forms at least one ink droplet. By applying different voltages to the piezo element is on the travel of the piezoelectric element and thus the reduction of the volume and thus the size of the ink droplets influence. In this way, color gradations in the resulting print image can be realized without changing a number of drops contributing to the print image (amplitude modulation). It is also possible to use at least one heating element per nozzle, which generates a gas bubble in a volume filled with ink at high speed by evaporation of printing ink. The additional volume of the gas bubble displaces ink, which in turn is ejected through the corresponding nozzle and forms at least one ink droplet.

In the drop-on-demand method, a drop deflection after ejection from the corresponding nozzle is not necessary, since it is possible to set a target position of the respective ink drop on the moving printing material web 02 with respect to the Set circumferential direction of the first central cylinder 201 alone by an emission timing of the respective ink droplet drop and a rotational speed of the first central cylinder 201. By individual control of each nozzle ink droplets are transmitted from the at least one print head 212 to the printing substrate 02 only at selected times and at selected locations. This is done as a function of the rotational speed of the central cylinder 201, a distance between the respective nozzle and the printing substrate 02 and the position of the target area of the respective nozzle with respect to the circumferential angle. This results in a desired printed image, which is designed as a function of the control of all nozzles.

The alignment of the printing material web 02 by means of the web edge aligner 114 and by the first impression roller 206 of the first printing unit 200 and the large wrap angle of the printing material 02 to the first central cylinder 201 ensures that the printing substrate 02 without slippage in a precisely defined position on the lateral surface the first central cylinder 201 is arranged and also remains until a selective detachment at the end of the range of the wrap angle. Due to the contact of the printing material web 02 with the lateral surface of the first central cylinder 201, swelling of the printing material web 02, at least in the transport direction of the printing material web 02 and at least for the duration of contact of a respective region of the printing substrate web 02 with the lateral surface of the first central cylinder 201, also after contact prevented with ink drops or at least sufficiently reduced. This ensures that ink droplets of different print heads 211 are applied to a printing material web 02 arranged in a uniformly defined manner. An exact and constant position of the printing substrate 02 relative to the first central cylinder 201 is of great importance for a passport-compatible and / or register-compatible printed image.

The nozzles of the at least one print head 212 are arranged such that a distance between the nozzles and on the outer surface of the central cylinder 201 arranged printing material web 02 preferably between 0.5 mm and 5 mm and more preferably between 1 mm and 1.5 mm. The high angular resolution and / or the high sampling frequency of the rotation angle sensor enables a very accurate position determination of the printing substrate 02 relative to the nozzles and their target areas. A drop flight time between the nozzles and the printing material web 02 is known, for example, by a teaching process and / or by the known distance between the nozzles and the printing material web 02 and a known drop speed. From the angular position of the first central cylinder 201, the rotational speed of the first central cylinder 201 and the droplet pitch, an ideal time for ejecting a respective droplet is determined, so that an equestrian and / or register-compatible imaging of the printing substrate 02 is achieved.

Preferably, at least one sensor designed as the first print image sensor is arranged, more preferably at one point along the transport path of the printing material web 02 after the first printing group 211. The at least one first print image sensor can be configured, for example, as a first line camera or as a first area camera. By means of this at least one first print image sensor and a corresponding evaluation unit, for example the higher-level machine control, a control of all in the circumferential direction of the first central cylinder 201 successive and / or acting print heads 212 and / or double rows of print heads 212 of the first printing unit 211 is monitored and controlled. In a first embodiment of the at least one print image sensor, only a first print image sensor is arranged, the sensor field of which covers the entire width of the transport path of the printing material web 02. In a second embodiment of the at least one print image sensor only a first print image sensor is arranged, which is designed to be movable in the direction A orthogonal to the direction of the transport path of the printing substrate 02. In a third embodiment of the at least one print image sensor, a plurality of print image sensors are arranged, whose respective sensor fields each comprise different regions of the transport path of the printing material web 02. Preferably, these areas are in the Direction A orthogonal to the direction of the transport path of the printing substrate 02 offset from each other. Preferably, an entirety of the sensor fields of the plurality of print image sensors comprises an entire width of the transport path of the printing material web 02.

A ply of pixels formed by ink droplets originating from a respective first printhead 212 is preferably compared to a ply of pixels formed by ink droplets emerging from respective second circumferentially of the first central cylinder 201 after each first printhead 212 lying printhead 212 originate. This is preferably done independently of whether these process each first and second, in the circumferential direction of the first central cylinder 201 successive and / or acting print heads 212 a same or a different ink. A tuning of the layers of printed images from different printheads 212 is monitored. For the same inks, register-based joining of partial images is monitored. For different inks, a register or color register is monitored. A quality control of the printed image is preferably also carried out with the measured values of the at least one printed image sensor. Depending on the speed with which individual nozzles can be controlled and operated, the printing substrate 02 may need to be printed several times with the same printing ink until the desired result can be achieved. For this purpose, each printing ink is preferably associated with at least two double rows of printing heads 212 lying one behind the other in the circumferential direction of the first central cylinder 201. Thus, a resolution of 600 dpi (600 pixels per inch) is achieved at a transport speed of the printing substrate 02 of 2 m / s and a four-color printing. Smaller resolutions and / or fewer colors allow correspondingly higher transport speeds. A larger number of print heads 212 is another way to influence the achievable print resolution and / or transport speed and / or color selection. In particular, one must be sufficient high data processing speed of the printheads 212 controlling controller are respected.

In a regular printing operation, all printheads 212 are stationary. This ensures a permanent register-accurate and / or register-based alignment of all nozzles. Different situations are conceivable in which a movement of the print heads 212 is necessary. A first such situation is a flying roll change or generally a roll change with gluing process. In this case, one printing material web 02 is connected by means of an adhesive strip to another printing material web 02. This results in a connection point, which must pass through the entire transport path of the printing substrate 02. This connection point has a thickness, ie a smallest dimension, which is greater than a thickness of the printing material web 02. Essentially, the connection point is as thick as two printing substrate webs 02 and the adhesive strip together. As a result, difficulties may arise when the joint passes the gap between the nozzles of the print heads 212 and the outer surface of the first central cylinder 201. The at least one nozzle bar 213 is therefore movable in a radial direction relative to the rotation axis 207 of the first central cylinder 201. In this way, the distance can be sufficiently increased, but must be subsequently reduced accordingly again. A second such situation results, for example, in a maintenance of at least one of the print heads 212. The print heads 212 are preferably individually attached to the at least one nozzle bar 213 and individually detachable from the at least one nozzle bar 213. This allows individual printheads 212 to be maintained and / or cleaned and / or replaced.

If a plurality of nozzle bars 213 which are movable relative to one another are arranged, minimal misalignment of the nozzle bars 213 with one another may occur when at least one nozzle bar 213 is returned to a pressure position. An alignment requirement can thus occur, in particular of all print heads 212 of a nozzle bar 213 Print heads 212 other nozzle bar 213. If a new and / or reordering printhead 212 attached to the at least one nozzle bar 213, to which at least one other printhead 212 is attached, it does not necessarily result but at most coincidentally exactly this alignment and new The printhead 212 to be rearranged to the at least one already mounted printhead 212, both in the circumferential direction and in the axial direction A with respect to the first central cylinder 201. Here, too, may be an alignment requirement, in particular a single printhead 212 to other printheads 212 of the same Nozzle bar 213 and / or other nozzle bar 213.

At least one sensor detects a position of the target area of at least one new and / or re-arranged printhead 212 relative to a location of the target area of at least one printhead 212 already attached. This is preferably done by comparing locations of pixels generated by the respective printheads 212 on the printhead Substrate web 02. The sensor used for this is preferably the already described at least one printed image sensor. However, it is also possible to use a sensor for this purpose other than the print image sensor already described, for example a sensor specialized in this task. These relative positions are evaluated by means of an evaluation unit, for example the higher-level machine control. An installation position of the at least one new and / or re-arranged print head 212 in the circumferential direction with respect to the first central cylinder 201 can be compensated via the control of the nozzles of this print head 212, preferably analogous to the already described adaptation of print heads 212 different double rows of print heads 212. An installation position the at least one new and / or re-arranged print head 212 in the axial direction with respect to the first central cylinder 201 is compensated by means of at least one adjustment mechanism. Preferably, several print heads 212 each have their own adjustment mechanism, more preferably, all print heads 212 each have their own adjustment mechanism. It is conceivable to use a print head 212 as reference, after all other printheads 212 are aligned. This used as a reference printhead 212 then does not need its own adjustment mechanism. Each such adjustment mechanism has at least one linear drive, which is preferably designed as an electric motor and more preferably as a stepper motor. The linear drive has, for example, a spindle drive and / or a rack and a pinion. Each printhead 212 is preferably arranged to be movable parallel to the axial direction A by means of its linear drive.

After installation of at least one print head 212, a test print is carried out in which the print head 212, which is new and / or to be arranged again, and at least one print head 212 serving as the reference, transfers ink drops to the printing material web 02. The test printout is preferably detected automatically by means of a sensor, for example the first camera. In the case of a deviation of an actual position of the at least one new and / or arranged printhead 212 detected by the test printout, the position of this print head 212 in the axial direction A is preferably automatically adjusted by means of the adjustment mechanism and / or an adaptation of the control of the nozzles of this Printhead 212 made with respect to a drop ejection timing.

The at least one nozzle bar 213 is preferably arranged movably in the axial direction A, more preferably so far that no nozzle of the nozzle bar 213 and / or no working area of a print head 211 of the nozzle bar 213 has a same position with respect to the axial direction A as any component bale of the first central cylinder 201. For this purpose, at least one linear guide is preferably arranged. A carriage carrying the at least one nozzle bar 213 is arranged movably along the at least one linear guide. For maintenance of the printing unit 211, the at least one nozzle bar 213 is preferably first turned off in a direction oriented radially to the axis of rotation 207 of the first central cylinder 201 from the first central cylinder 201 and subsequently moved in the axial direction A. Preferably, a protective cover is arranged, which is movable in a position relative to the at least one nozzle bar 213, in which the protective cover is arranged covering all the nozzles of the at least one, stopped from the first central cylinder 201 nozzle bar 213. In this way, drying of the nozzles is prevented. Preferably, a nozzle cleaning device is arranged, which has a number of washing nozzles and / or brushes. This nozzle cleaning device is preferably movable from below to the nozzles of the at least one nozzle bar 213. Preferably, the nozzle cleaning device is connected to the protective cover. The protective cover then serves as a collecting container for leaked from the washing nozzles and from the nozzles dripping cleaning liquid and dirt. The at least one nozzle bar 213 is completely independent of those components of the printing press 01 movable, which are arranged touching the printing material 02. Thus, such cleaning and / or maintenance can be carried out without affecting the printing material web 02 and in particular without having to remove the printing material web 02 from the printing press 01.

After the printing substrate 02 has passed the at least one first printing unit 200, the printing material web 02 is transported further along its transport path and preferably fed to the at least one first dryer 301 of the at least one dryer unit 300. The at least one first dryer 301 is accordingly arranged with respect to the transport path of the printing material web 02 after the first printing unit 211 and in particular after the at least one first printing unit 200. Preferably, the first side of the printing material web 02 printed by the at least one first printing unit 200 is between a last contact point of the printing material web 02 with the at least one first central cylinder 201 of the at least one first printing unit 200 and an area of action of the at least one first dryer 301 with no component of FIG Roller rotary printing machine 01 in contact. Preferably, the second side, in particular not printed by the first printing unit 200, contacts the at least one first central cylinder 201 of the at least one first printing unit 200 the printing material web 02 between the last contact point of the printing substrate 02 with the first central cylinder 201 of the at least one first printing unit 200 and the Einwirkbereich the at least one first dryer 301 with at least one guide roller 214 of the at least one first printing unit 200 and / or at least one guide roller 312 of the at least a first dryer 301 in contact. Preferably, at least one deflection roller 214 of the first printing unit 200 designed as a measuring roller 214 is arranged, which separates the printing material web 02 from the first central cylinder 201 in one direction with a greater vertical, preferably downwardly oriented component than any horizontal component 201 Redirects direction, which has a larger horizontal component than any existing vertical component. In this case, only the second side of the printing material web 02 not printed by the first printing unit 200 is in contact with this at least one deflection roller 214 of the first printing unit 200. Preferably, at least one guide roller 312 of the at least one first dryer 301 is arranged, the printing material 02 from this direction or another direction with greater horizontal component than any existing vertical component in a direction with greater vertical, preferably upwardly oriented component than any existing horizontal Component deflects. In this case, only the second side of the printing material web 02 touching the at least one first central cylinder 201 of the at least one first printing unit 200 is in contact with the at least one deflection roller 312 of the at least one first dryer 301.

The at least one first dryer 301 is preferably designed as an infrared radiation dryer 301. The at least one first dryer 301 has at least one and preferably several, more preferably at least six and even more preferably at least ten radiation sources 302 arranged one behind the other in the transport direction of the printing substrate 02, which are preferably designed as infrared radiation sources 302. A radiation source 302, preferably infrared radiation source 302, is a Device by means of the targeted electrical energy in radiation, preferably infrared radiation is converted or convertible and is directed to the printing substrate 02 or is directable. The at least one radiation source 302 preferably has a defined area of action. In particular, the exposure region of a radiation source 302 is in each case the region which contains all the points which, in particular, can be connected in a straight line directly or via reflectors to the radiation source 302 without interruption. The area of action of the at least one first dryer 301 is composed of the areas of action of all the radiation sources 302 of the at least one first dryer 301. The area of action of the at least one first dryer 301 points from the at least one radiation source 302 to one of the at least one radiation source 302 nearest part of the transport path of the printing substrate 02.

The at least one radiation source 302 has a length and a width and a height. The length of the radiation source 302 is at least five times as large as the width and the height of the radiation source 302. Preferably, the length of the at least one radiation source 302 in the axial direction A extends parallel to the axis of rotation 207 of the at least one first central cylinder 201 This means that the at least one first dryer 301 has at least one radiation source 302 which extends in a horizontal direction orthogonal to the transport path of the printing substrate 02 through the at least one first dryer 301 oriented direction A. , The arrangement of a plurality of radiation sources 302 oriented in this way in the transport direction of the printing substrate 02 in succession allows adaptation of a total of radiated on the printing substrate 02 radiation power to each applied to the substrate 02 color amount and / or color density.

The at least one radiation source 302 preferably has at least one and more preferably two tubes whose diameter is preferably between 10 mm and 50 mm be. The at least one tube preferably consists of material which is at least partially permeable to radiation in the infrared range, more preferably of a quartz glass. Arranged inside each such tube is at least one incandescent body, preferably an incandescent filament or an annealing strip, which preferably consists of tungsten and / or a tungsten alloy and / or carbon (carbon). The filament may for example consist of tungsten carbide. Preferably, a reflector layer is applied to a side of the tubes facing away from the printing substrate 02. The incandescent bodies act as heating resistors, which cause heating and heat emission during current flow. Each radiation source 302 has a housing 316 which preferably has at least one and more preferably a plurality of ventilation openings and which preferably is not arranged between the incandescent bodies and the printing material web 02. Preferably, all the vent openings open into a common air discharge line 318.

In one embodiment, which is preferably identical to that described above and below except for alignment of the at least one radiation source 302, the length of the at least one radiation source 302 is aligned parallel to the transport direction of the printing material web 02. Preferably, a plurality of radiation sources 302 are then arranged next to one another in the direction A of the width of the printing material web 02. This means that the at least one first dryer 301 has at least one radiation source 302 which extends in a direction which has at least one component oriented parallel to the transport path of the printing substrate 02 through the at least one first dryer 301. In this way, it is possible to optimize printing material webs 02 of different widths optimally, without spending too much energy and / or risking overheating of the at least one first dryer 301. An adaptation of the dryer power can take place via a preferably individual regulation of a radiation power of the at least one radiation source 302.

Preferably, however, the plurality of radiation sources 302 are parallel in length arranged to each other. Preferably, the plurality of radiation sources 302 are arranged side by side in a direction which is aligned orthogonally to the length of the radiation sources 302 and / or which extends along the transport path of the printing material web 02. Thus, a plurality of radiation sources 302 preferably extend orthogonally to the transport direction of the printing material web 02 and are arranged one behind the other in the transport direction of the printing material web 02. Due to the radiation emitted by the at least one radiation source 302, moisture is removed from the printing material web 02 and / or from the printing ink disposed thereon and absorbed by the ambient air in an interior space of the at least one first dryer 301. The transport path of the printing substrate 02 extends through this interior of the at least one first dryer 301. To achieve a permanently high drying performance, a tempering of components of the at least one first dryer 301 and / or a venting of the interior of the at least one first dryer 301 is provided , For this purpose, at least one tempering device is preferably arranged in the region of the at least one radiation source 302. In a preferred embodiment, the temperature control device is designed as a ventilation device. The ventilation device preferably also serves to remove moisture from the at least one first dryer 301.

The ventilation device has at least one air supply line 317 and preferably at least one ventilation opening 313 connected thereto and an air discharge line 318, and preferably at least one ventilation opening connected thereto. The at least one ventilation opening 313 is traversed by air in a direction directed into the interior of the at least one dryer 301. The at least one first dryer 301 is therefore likewise designed as a flow dryer 301 in addition to its design as a radiation dryer 301. Alternatively or additionally, the at least one first dryer 301 is designed as a UV radiation dryer 301 and / or as a pure flow dryer 301, for example hot air dryer 301. Preferably, at least one preferably slot-shaped ventilation opening 313 is arranged. Further preferred at least one, preferably slot-shaped ventilation opening 313 arranged at least between two radiation sources 302 and even more preferably between each two radiation sources 302. The housing 316 of at least one and preferably each radiation source 302 preferably has at least one ventilation opening, more preferably a multiplicity of ventilation openings.

In one embodiment, such a tempering device has at least one fluid-tempered, preferably liquid-tempered component, which is preferably arranged at a distance of at most 50 cm, more preferably at most 15 cm, from the at least one radiation source 302. For example, such a fluid-temperature-controlled component is arranged in the area of action of the at least one first dryer 301. Such a fluid-tempered component is for example a Bedruckstoffleitelement, for example, a Bedruckstoffleitblech having at least one, with tempering fluid and preferably temperature-controlled liquid and / or flow-through line and / or is connected to such. Alternatively or additionally, in one embodiment, at least one part of the housing 316 of at least one and preferably each radiation source 302 has at least one line which is flowed through and / or flowed through with tempering fluid and preferably temperature control fluid and / or is connected to such. As tempering fluid, for example, water is used.

Air is introduced into the interior of the at least one first dryer 301 through the at least one ventilation opening 313. In the first dryer 301 there is preferably an overpressure. In the interior of the first dryer 301, water and / or solvent of the printing inks to be removed by the infrared radiation from the printing material web 02 are removed and taken up by the introduced air. This air is then removed through the at least one vent opening from the at least one first dryer 301. By a removal of this air, which has absorbed the excess water and / or solvent, on the one hand, a saturation of the arranged in the first dryer 301 air with water and / or Solvent avoided and on the other hand additionally dissipated heat energy from the interior of the dryer 301. This increases an efficiency of the first dryer 301 and a lifetime of the radiation sources 302.

The at least one ventilation opening 313 is preferably connected upstream of the at least one air supply line 317, and the at least one ventilation opening is connected downstream of the at least one air discharge line 318. Preferably, at least one conveying device, for example a pump, is connected to the at least one air supply line 317 and more preferably at least indirectly to the at least one air discharge line. Preferably, at least one controllable and more preferably controllable gas valve is arranged. This at least one gas valve is preferably adjustable by hand and / or coupled to a drive and / or motor-driven and preferably designed as a branch with at least one flap. A first line connected to an input of the at least one gas valve is preferably the at least one air discharge line 318. A second line connected to an outlet of the at least one gas valve preferably leads, for example, to a disposal device and / or reprocessing device. A third line connected to an outlet of the at least one gas valve preferably leads to the at least one conveying device. At least one further line, for example a fresh air line, also leads to the at least one conveying device.

By means of the at least one gas valve, a portion of the air discharged from the at least one first dryer 301 can be adjusted, which, preferably by means of the at least one conveyor, is fed back to the at least one first dryer 301. For this purpose, the at least one gas valve is preferably adjusted so that a preferably from 0% to 100% adjustable portion of the first flowing through the at least one gas valve line flowing air into the third connected to the at least one gas valve line and thus on the at least one conveyor and the at least one air supply line 317 again into the at least one first dryer 301 is transported. The remaining discharged air is supplied to the second line connected to the at least one gas valve and transported away. The at least one gas valve thus determines a portion supplied to the air supply line 317 and a portion of a gas stream flowing through the air discharge line 318, which is discharged as exhaust air. As a result of this evacuation, a negative pressure is created, which is preferably automatically compensated for by transporting further air preferably first into the at least one conveying device and into the at least one first drier 301 via the fresh air line. Preferably, the negative pressure itself ensures a suction of a necessary volume of air through the fresh air line. In this way, an effectiveness of the at least one first dryer 301 is improved because not completely saturated exhaust air is reused and thereby heat energy can be saved because the warm air is re-introduced. On the other hand, necessary treatment measures reduce the volume of air to be cleaned.

The at least one ventilation opening 313 and / or the at least one air supply line 317 and / or the at least one ventilation opening and / or the at least one air discharge line 318 and / or the at least one delivery device and / or the at least one gas valve and / or the at least one second The at least one gas valve connected line and / or the at least one disposal device and / or reprocessing device and / or the at least one third connected to the at least one gas valve line and / or fresh air line are preferably components of a ventilation device of the at least one first dryer 301. In particular, that means in that the at least one first dryer 301 preferably has the at least one ventilation device and that the at least one ventilation device comprises the at least one air supply line 317 leading to the at least one first dryer 301 and the at least one of the at least one first drying he leading away air discharge line 318 and the at least one, preferably driven and / or driven, for example by means of an electric drive driven conveyor and that the at least one air discharge line 318 coupled via the at least one conveyor with the at least one air supply line 317 and / or can be coupled. A leading to the at least one first dryer 301 air supply line 317 is to be understood in particular a line 317, the interior of which is connected to an interior of the at least one first dryer 301 and whose interior in an operation of the at least one first dryer 301 of a gas in Direction to the interior of the at least one dryer 301 is flowed through. Under a leading away from the at least one first dryer air discharge line 318 is to be understood in particular a conduit 318 whose interior is connected to the interior of the at least one first dryer 301 and whose interior in an operation of the at least one first dryer 301 of a gas in Direction is flowed away from the interior of the at least one dryer 301 away.

Preferably, the transport path of the printing material web 02 by the at least one first dryer 301 and in particular by the Einwirkbereich the at least one first dryer 301, a larger vertical component than any existing horizontal component. In particular, the transport path of the printing material 02 through an area of action of the at least one first dryer 301 is preferably at least 75%, more preferably at least 95%, and even more preferably completely in at least one direction with a greater horizontal than horizontal component. More preferably, the transport path of the printing substrate 02 extends through the at least one first dryer 301 substantially in the vertical direction upwards. This ensures that, in the case of a web break, no part of the printing material web 02 falls from above onto a radiation source 302 and / or comes to rest on a radiation source 302. In this way, inflammation of the printing material web 02 at the hot radiation sources 302 is prevented. Preferably, at least one first support roller 319 is arranged along the transport path in the interior of the at least one first dryer 301, more preferably such that the at least one first support roller 319 through the printing material 02 against the Radiation sources 302 is shielded. The at least one first support roller 319 prevents uncontrolled fluttering of the printing material web 02, which otherwise could occur due to the air flowing out of the at least one ventilation opening 313. A wrap angle of the printing material web 02 around the at least one first support roller 319 is preferably between 1 ° and 45 °, more preferably between 1 ° and 25 °.

In the transport direction of the printing material web 02 after the area of action of the at least one radiation source 302 of the at least one first dryer 301, at least one first cooling device 303 is preferably arranged. The at least one first cooling device 303 preferably has at least one first cooling roller 304 and preferably a first, at least one first cooling roller 304 engagable and / or employee Kühlwalzenpresseur 306 and preferably at least one, at least one first cooling roller 304 engageable and / or employed Anlenkwalze 307; 308 up. The first chill roll press 306 preferably has a lateral surface which consists of an elastic material, for example an elastomer. One of the at least one first cooling roller 304 associated first, designed as a first cooling roller drive motor 311 drive motor 311 and the first Kühlwalzenpresseur 306 are preferably part of a web tension control, so the web tension arranged regulating and preferably for this purpose at least partially and / or temporarily connected to the higher-level machine control. After leaving the area of action of the first dryer 301, the printing material web first wraps around a first connecting roller 307 and preferably passes through a nip between the first connecting roller 307 and the at least one first cooling roller 304. The printing material web 02 wraps around the at least one first cooling roller 304 in its further course with a wrap angle of preferably at least 180 ° and more preferably at least 270 °. This means that one, provided as a contact surface between the at least one first cooling roller 304 and the printing substrate 02 partial surface of a lateral surface of the at least one first cooling roller 304 a wrap around the at least one first cooling roller 304, preferably at least 180 ° and more preferably at least 270 °. This leads to a particularly effective cooling of the printing substrate 02 and thus also enables high dryer performance. In particular, a space requirement of the at least one first cooling device 303 is low, since even with a cooling roller 304, a high transfer of energy can be achieved.

The first cooling roll press 306 forms with the at least one first cooling roll 304 a first cooling roll gap 309, in which the printing material web 02 is arranged and / or which passes through the printing material web 02. In this case, the printing material web 02 is pressed by the cooling roller press 306 to the at least one first cooling roller 304. In its further course, the printing material web 02 preferably wraps around a second connecting roller 308 of the at least one first cooling device 303. The at least one first cooling roller 304 of the at least one first cooling device 303 is preferably designed as a cooling roller 304 through which a coolant flows. This means that at least part of a bale of the at least one first cooling roller 304 flows through the coolant and / or is designed to flow through. The coolant is preferably a coolant, for example water. In a preferred embodiment, a fluid circuit is connected to both the at least one first cooling device 303 and, if present, the second cooling device 333, as well as to the temperature control device of the at least one radiation source 302. The cooling roll 304 preferably has its own cooling roll drive motor 311.

Along the transport path of the printing material web 02 after the at least one first cooling device 303, at least one second printing unit 400 is arranged. Preferably, at least one second web edge aligner is arranged along the transport path of the printing material web 02 preferably immediately before the at least one second printing unit 400 and preferably after the at least one first dryer 301 and in particular after the at least one first printing unit 200, which preferably can be controlled manually or driven and / or is designed adjustable. The at least one second printing unit 400 is constructed analogously to the first printing unit 200. Preferably, the at least one second printing unit 400 with respect to the components described essentially and further preferably completely symmetrical to the at least one first printing unit 200 constructed. A corresponding plane of symmetry has a horizontal surface normal lying orthogonal to the axial direction A. In particular, the second printing unit 400 has a second central cylinder 401 or short central cylinder 401, which is wrapped in the printing operation of the printing substrate 02, and also with a wrap angle of preferably at least 180 ° and more preferably at least 270 °. Accordingly, at least 50% and more preferably at least 75% of a cylinder jacket surface of the second central cylinder 401 are in contact with the printing material web 02 when viewed in the circumferential direction in the circumferential direction. The second central cylinder 401 of the second pressure unit 400 has a rotational direction opposite to a rotational direction of the first central cylinder 201. Along the transport path of the printing material web 02 in front of the central cylinder 401 of the second printing unit 400, a second printing material cleaning device 402 or web cleaning device 402 is preferably arranged to act on the printing material web 02. The second printing substrate cleaning device 402 is preferably designed as a second dedusting device 402. The second printing material cleaning device 402 preferably has at least one brush and / or at least one suction device and / or device for the electrostatic discharge of particles adhering to the printing material web 02. The second printing substrate cleaning device 402 is assigned to at least one second side of the printing material web 02, in particular aligned and / or capable of acting at least on this second side of the printing substrate web 02. If the first printing substrate cleaning device 202 is formed on both sides of the printing material web 02 acting and / or effective, the second Bedruckstoffreinigungsvorrichtung 402 can be omitted.

A roller 403 of the second printing unit 400 formed as a second deflecting roller 403 is parallel to the second central cylinder 401 and from this by a second Gap 404 spaced apart. The transport path of the printing substrate 02 through the at least one second printing unit 400 extends analogously to the transport path through the at least one first printing unit 200. In particular, the printing substrate 02 preferably wraps around a part of the second deflecting roller 403 and is deflected by the latter in such a way that the transport path of the printing material web 02 in the second intermediate space 404 both tangential to the second guide roller 403 and tangent to the second central cylinder 401 extends. Preferably, at least one cylinder 406 designed as a second impression roller 406 is arranged in the second printing unit 400. The second impression roller 406 preferably has a lateral surface which consists of an elastic material, for example an elastomer. The second impression roller 406 is preferably constructed and arranged analogously to the first impression roller 206, in particular with regard to its mobility and a second impression gap 409. The second central cylinder 401 is preferably arranged and constructed analogously to the first central cylinder 201, in particular with respect to a second drive motor 408 and one corresponding second rotation angle sensor, which is a rotational angle position of the second drive motor 408 and / or the second central cylinder 401 itself measuring and / or capable of measurement and transmitting to the higher-level machine control and / or sendable. By the second guide roller 403 and / or preferably by the second impression roller 406, the printing substrate 02 is applied flat and preferably in a unique and known position to the second central cylinder 401. In particular, the second drive motor 408 is preferably designed as an electric motor 408 and further preferably designed as a direct drive 408 and / or individual drive 408 of the first central cylinder 201. The second drive motor 408 of the second central cylinder 401 is preferably designed as a synchronous motor 408.

The second rotation angle sensor is likewise designed, for example, as a rotary encoder or absolute value encoder, so that a rotational position of the second drive motor 408 and / or preferably a rotational position of the second central cylinder 401 can be determined absolutely by means of the higher-level machine control. The second Drive motor 408 of the second central cylinder 401 is preferably arranged on a first, relative to the axis of rotation 407 of the second central cylinder 401 axial end of the second central cylinder 401, while the rotation angle sensor preferably at a second, related to the axis of rotation 407 of the second central cylinder 401 axial end of the second Central cylinder 401 is arranged. The rotation angle sensor preferably also has a particularly high resolution, for example a resolution of at least 3,000 (three thousand) and preferably at least 10,000 (ten thousand) increments per full angle (360 °).

Within the second printing unit 400, at least a second printing unit 411 designed as an ink jet printing unit 411 or ink jet printing unit 411 is arranged in the direction of rotation of the second central cylinder 401 and thus along the transport path of the printing material web 02 after the second impression roller 406 aligned with the second central cylinder 401 , The at least one second printing unit 411 of the at least one second printing unit 400 is preferably identical to the at least one first printing group 211 of the at least one first printing unit 200, in particular with respect to at least one nozzle bar 413, at least one printhead 412 formed as an inkjet printhead 412 and arranged in double rows , the execution and resolution of the printing process, the arrangement, alignment and control of the nozzles and the mobility and adjustability of the at least one nozzle bar 413 and the at least one print head 412 means of at least one adjustment mechanism with a corresponding electric motor. An analogous protective cover and / or cleaning device is also preferably arranged. Also, a correct alignment of the printheads 412 of the at least one second printing unit 400 is preferably checked by at least one sensor detecting a printed image and the machine controller evaluating this image. This at least one sensor is preferably at least one second printed image sensor which is designed analogously to the at least one first printed image sensor. Preferably, the at least one second printing unit 411 is designed as a four-color printing unit 411.

The printing press 01 preferably has at least one register sensor which detects a position of at least one and preferably each first printed image from which at least one first printing group 211 is applied to the first side of the printing material web 02 and sends it to the higher-level machine control. As the at least one printed image, which is detected by the register sensor, for example, a barcode can be used, which is applied for this purpose in the first printing unit 200 to the printing substrate 02. Such a barcode may contain information about the content and / or dimensions of a printed image applied by the first printing unit 200 to the printing substrate 02. This ensures registration, even if, for example, a section length, that is to say a length of applied printed images, is changed in the direction of the transport path of the printing material web 02. The higher-level machine control calculates from the position of this print image the ideal period for driving the nozzles of the printheads 412 of the at least one second printing unit 411. In this way, a register-oriented alignment of the first print image on the first side of the substrate web 02 and second print image on the second page reaches the printing substrate 02.

The register sensor is preferably arranged closer to the second central cylinder 401 than to the first central cylinder 201. As many influences as possible can be taken into account, which expose the printing material web 02 along its transport path between the at least one first printing unit 211 and the at least one second printing unit 411 is, for example, expansions of the printing substrate 02 along the transport path. Preferably, the at least one register sensor is designed as at least one area camera. Such an area camera preferably has a sufficiently high resolution to detect register errors and / or registration errors, for example, a resolution greater than 0.05 mm. Preferably, the at least one register sensor with the at least one first print image sensor identical to the control of all in the circumferential direction of the first central cylinder 201 successive and / or acting print heads 212 and / or double rows of print heads 212 of the first printing unit 211 is monitored and controlled.

With regard to the transport path of the printing material web 02, at least one second dryer 331 is arranged after the at least one second printing unit 400. After the printing material web 02 has passed the at least one second printing unit 400, the printing material web 02 is transported further along its transport path and fed to the at least one second dryer 331 of the at least one dryer unit 300. The at least one second dryer 331 is preferably constructed analogously to the at least one first dryer 301. The at least one first dryer 301 and the at least one second dryer 331 are components of the at least one dryer unit 300. Preferably, an area of action of the at least one first dryer 301 relative to the printing substrate 02 points away from the at least one second dryer 331 and points to the printing material web 02 related Einwirkbereich the at least one second dryer 331 of the at least one first dryer 301 away. Preferably, between the at least one first dryer 301 and the at least one second dryer 331 passes through a section of the transport path of the printing material web 02 passing the at least one first dryer 301 and the at least one second dryer 331.

Preferably, the second side of the printing material web 02 printed by the at least one second printing unit 400 is connected between a last contact point of the printing material web 02 with the second central cylinder 401 of the at least one second printing unit 400 and an area of action of the at least one second dryer 301 with no component of the web. Printing machine 01 in contact. Preferably, the first printed by the first printing unit 200, already dried and not printed by the second printing unit 400, the second central cylinder 401 of the at least one second Printing unit 400 contacting side of the substrate web 02 between the last contact point of the printing substrate 02 with the second central cylinder 401 of the at least one second printing unit 400 and the Einwirkbereich the at least one second dryer 331 with at least one guide roller 414 of the at least one second printing unit 400 and / or at least a deflection roller 342 of the at least one second dryer 331 in contact. Preferably, at least one deflection roller 414 of the second printing unit 400 is arranged, which deflects the printing material web 02 in a direction which has been detached in a direction with a greater vertical, preferably downwardly oriented component than any existing horizontal component from the second central cylinder 401 in a direction has a larger horizontal component than optionally present vertical component. In this case, only the first side of the printing material web 02 not printed by the second printing unit 400 is in contact with this at least one deflection roller 414 of the second printing unit 400. Preferably, at least one deflection roller 342 of the at least one second dryer 331 is arranged, which the printing material 02 from this direction or another direction with greater horizontal component than any existing vertical component in a direction with greater vertical, preferably upwardly oriented component than any existing horizontal Component deflects. In this case, only the first side of the printing material web 02 not printed by the second printing unit 400 is in contact with the at least one deflection roller 342 of the at least one second dryer 331.

The at least one second dryer 331 is also preferably designed as an infrared radiation dryer 331. The structure of the at least one second dryer 331 is similar to the construction of the at least one first dryer 301, in particular with regard to a design as a flow dryer 331 and / or radiation dryer 331 and / or hot air dryer 331 and / or UV radiation dryer 331. In particular, the at least one Second dryer 331 preferably includes at least one second chill roll 334, more preferably at least a sixth chill roll 334 motor-driven rotary body 334 represents. Preferably, the second cooling roller 334 is driven and / or driven by means of a second cooling roller drive 341. Preferably, the at least one second dryer 331 is constructed essentially and more preferably completely symmetrically relative to the at least one first dryer 301 with respect to the described components. Preferably, the at least one second dryer 331 likewise has a ventilation device, which is designed analogously to the ventilation device of the at least one first dryer 301 and / or is coupled or identical to it.

The at least one second dryer 331 is preferably part of the same dryer unit 300 as the at least one first dryer 301 and is further preferably arranged in a same housing 329. With regard to a spatial arrangement, the dryer unit 300 and thus preferably the at least one first dryer 301 and the at least one second dryer 331 are preferably arranged between the at least one first printing unit 200 and the at least one second printing unit 400. This means that preferably a rectilinear connecting line of an axis of rotation 207 of the at least one first central cylinder 201 of the at least one first printing unit 200 with an axis of rotation 407 of at least one second central cylinder 401 of at least one second printing unit 400, the at least one dryer unit 300 is arranged to intersect.

Along the transport path of the printing substrate 02 after the at least one second dryer 331 at least one pullout roller 501 is arranged. The at least one pull-out roller 501 forms, together with an extension press 502 which is set and / or adjustable against the at least one pull-out roller 501, a pull-out gap 503 in which the printing material web 02 is clamped and through which the printing material web 02 is conveyed. The pull-out press 502 preferably has a lateral surface which consists of an elastic material, for example an elastomer. The pull-out gap 503 is used to control a web tension. Along the transport route of the Substrate web 02 after the separation nip 503, at least one post-processing device 500 is arranged, which is preferably designed as a folding device 500 and / or a sheet cutter 500 and / or a planning display 500 has. In this and / or by this post-processing device 500, the printing substrate 02 is preferably folded and / or cut and / or sorted and / or enveloped and / or shipped. Before or after the extension roller 501, but in particular along the transport path of the printing material 02 after the at least one first dryer 301, a rewet is preferably arranged, which preferably compensates for excessive moisture loss of the printing substrate 02 due to the treatment by the dryer unit 300.

The transport path of the printing substrate 02 through the printing press 01 can be divided into several sections. Along the transport path of the printing material web 02 by the rotary rotary printing press 01, at least the feed nip 119, the first impression nip 209, the first cooling nip 309, the second impression nip 409, the second cooling nip 339 and the nip 503 are arranged. These are preferably used to control the web tension. Starting from the printing material roll 101 in the roll-off device 100, a first section of the transport path initially runs via the dancer roller 113 and through the web edge aligner 114 into the intake nip 119. A regulation of the web tension in this first section preferably takes place in that the at least one drive motor 104 of FIG Clamping device 103 is controlled in its rotational speed so that the dancer roller 113 supporting dancer lever 121 remains in a central position.

A second section of the transport path runs from the intake nip 119 around at least one first measuring roller 216 and around the first deflecting roller 203 and around the first central cylinder 201 to the first impression nip 209 of the at least one first printing unit 200. The transport path preferably extends starting from the intake nip 119 initially with greater horizontal than optionally present vertical component over the at least one first printing unit 200 and then with greater vertical downward pointing than optionally present horizontal component up to a height below the first central cylinder 201 and then with a larger horizontal than optionally existing vertical component below the axis of rotation 207 of the first central cylinder 201 and then around the first measuring roller 216 and the first guide roller 203 to the lateral surface of the first central cylinder 201 and the first impression gap 209. A regulation of the web tension in this second section is preferred in that the web tension is measured by means of the first measuring roller 216 and a rotational speed of the first central cylinder 201 is regulated by means of its drive motor 208 in such a way that the web tension on the first measuring roller 216 remains constant remains.

A third section of the transport path runs from the first impression gap 209 through the at least one first dryer 301 into the first cooling nip 309. The transport path preferably proceeds from the first impression nip 209 through the at least one first printing unit 211 and around the at least one second measuring roller 214 formed deflecting roller 214 of the first printing unit 200 and around the at least one guide roller 312 of the at least one first dryer 301 and through the at least one first dryer 301 and the first connecting roller 307 of the first cooling device 303 and the first cooling roller 304 into the A first control of the web tension in this third section is effected in that the web tension is measured by means of the second measuring roller 214 and a rotational speed of the first cooling roller 303 is controlled by means of its drive motor 311 such that the web tension on the second measuring roller 214 remains constant.

A fourth section of the transport path extends from the first cooling nip 309 around at least one third measuring roller 416 and around the second Deflection roller 403 around and around the second central cylinder 401 around into the second impression gap 409 of the at least one second printing unit 400. Preferably, the transport path starting from the first cooling nip 309 initially with greater horizontal than possibly present vertical component over the at least one first dryer 301 and the at least one second dryer 331 and then with greater vertically downwardly than optionally present horizontal component up to a height below the second central cylinder 401 and then with greater horizontal than any existing vertical component below the axis of rotation 407 of the second central cylinder 401 and then around a third measuring roller 416 and around the second deflecting roller 403 to the lateral surface of the second central cylinder 401 and into the second impression gap 409. A regulation of the web tension in this fourth section is preferably carried out h, that by means of the third measuring roller 416, the web tension is measured and a rotational speed of the second central cylinder 401 is controlled by its drive motor 408 so that the web tension at the third measuring roller 416 remains constant.

A fifth section of the transport path runs from the second impression gap 409 through the at least one second dryer 331 into a second cooling nip 339. The transport path preferably proceeds from the second impression nip 209 through the at least one second printing unit 411 and around the at least one fourth measuring roller 414 formed deflecting roller 414 of the second printing unit 400 and the at least one guide roller 342 of the at least one second dryer 331 and by the at least one second dryer 331 and a third connecting roller 337 of a second cooling device 333 and a second cooling roller 334 into the second cooling nip 339 formed by the second cooling roll 334 and the second cooling roll press 336. A regulation of the web tension in this fifth section preferably takes place in that the web tension is measured by means of the fourth measuring roller 414 and a rotational speed of the second cooling roller 333 is controlled by means of the drive motor 341 so that the web tension on the fourth measuring roller 414 remains constant.

A sixth section of the transport path runs from the second cooling nip 339 between the at least one first drier 301 and the at least one second drier 331 and around at least one fifth measuring roller 343 through the pullout gap 503. Regulation of the web tension in this sixth section is preferred in that the web tension is measured by means of the fifth measuring roller 343 and a rotational speed of the extension roller 501 is regulated by means of its drive so that the web tension at the fifth measuring roller 343 remains constant.

Preferably, all measuring rollers and / or other web tension measuring measuring devices and all drive motors are connected to the higher-level machine control, more preferably with an electronic Antriebsleitachse. The higher-level machine control preferably influences all drive motors with respect to the transport path of the printing substrate 02 preceding and / or subsequent bodies of revolution as soon as a drive motor is influenced on the basis of a measurement. In another embodiment, the web tension is regulated independently in the individual sections. This then indirectly results in changes in the web tension in the adjacent sections, which are then automatically compensated.

In a simplified embodiment, the first cooling nip 309 and / or the second cooling nip 339 are omitted so that said third portion and said fourth portion form a common portion and / or said fifth portion and said sixth portion form a common portion.

LIST OF REFERENCE NUMBERS

01

Printing machine, rotary printing machine, roller printing machine, inkjet printing machine, roller inkjet printing machine, roller rotary printing machine

02

Substrate, substrate web, paper web

100

Substrate source, roll-off device, reel splicer

101

printing material

102

-

103

Clamping device, mandrel, clamping cone, clamping shaft

104

Drive motor (103)

105

-

106

Belts, timing belts

107

Support arm (101)

108

Axle, support, support frame (107)

109

Swivel axis (108)

110

-

111

Rotation axis (101)

112

frame

113

dancer roll

114

Web edge aligner, web aligner

115

-

116

aligning

117

Zugpresseur

118

pulling roller

119

nip

120

-

121

dancer arm

200

Printing unit, first

201

Central pressure cylinder, central cylinder, first

202

Substrate cleaning device, web cleaning device, dedusting device, first

203

Roller, guide roller

204

Gap (201; 203)

205

-

206

Cylinder, impression roller, first

207

Rotation axis (201)

208

Drive motor, electric motor, single drive, direct drive, synchronous motor

209

Impression gap, first

210

-

211

Printing unit, inkjet printing unit, inkjet printing unit, four-color printing unit, first

212

Printhead, inkjet printhead, first

213

Nozzle bar, first

214

Deflection roller, measuring roller, second

215

-

216

Measuring roller, first

300

dryer unit

301

Dryer, radiation dryer, infrared radiation dryer, first

302

Radiation source, infrared radiation source

303

Cooling device, first

304

chill roll

305

-

306

Kühlwalzenpresseur

307

Anlenkwalze

308

Anlenkwalze

309

Cooling nip

310

-

311

Drive motor (304)

312

deflecting

313

Ventilation opening (301)

314

-

315

-

316

Housing (302)

317

Air supply line

318

Air discharge line

319

Back-up roller, first

329

Housing (300)

330

-

331

Dryer, radiation dryer, infrared radiation dryer, second

332

-

333

Cooling device, second

334

Chill roller, second

335

-

336

Chill roller press, second

337

Connecting roller, third

338

-

339

Cooling nip, second

340

-

341

Drive motor (334)

342

deflecting

343

Measuring roller, fifth

400

Printing unit, second

401

Central pressure cylinder, central cylinder, second

402

Substrate cleaning device, web cleaning device, dedusting device, second

403

Roller, guide roller

404

Gap (401; 403)

405

-

406

Cylinder, impression roller, second

407

Rotation axis (401)

408

Drive motor, direct drive, electric motor, single drive, synchronous motor

409

Impression gap, second

410

-

411

Printing unit, inkjet printing unit, inkjet printing unit, four-color printing unit, second

412

Printhead, inkjet printhead, second

413

Nozzle bar, second

414

Deflection roller, measuring roller, fourth

415

-

416

Measuring roller, third

500

Post-processing device, folding device, sheet cutter, plan delivery

501

outfeed roller

502

Auszugpresseur

503

excerpt gap

A

direction

Claims (15)

1. A printing machine (01), wherein the printing machine (01) has at least one first printing unit (200) and at least one first dryer (301), said at least one first printing unit (200) having at least one ink jet printing head (212), at least one first central cylinder (201) and an inherent first drive motor (208) associated with at least one first central cylinder (201) and said at least one first dryer (301) being formed as a radiation dryer (301) and wherein at least one first cooling device (303) is positioned along a transport path of a printing material (02) through the printing machine (01) after at least one dryer (301), characterized in that said at least one first dryer (301) has at least one ventilation device, which has at least one air inflow line (317) and at least one air outflow line (318) and that the transport path of the printing material (02) extends through an operation area of said at least one first dryer (301) to at least 75% in at least one direction with a larger vertical component than a possibly existing horizontal one and that a straight line of an axis of rotation (207) of at least one first central cylinder (201) of at least one first printing unit (200) connecting with an axis of rotation (407) of at least one second central cylinder (401) of at least one second printing unit (400) cuts at least one dryer unit (300) which has said at least one first dryer (301).
2. The printing machine according to claim 1, characterized in that said at least one first dryer (301) and subsequently at least one second printing unit (400) and subsequently at least one second dryer (331) are positioned along the transport path of the printing material (02) through the printing machine (01) after at least one first printing unit (200).
3. The printing machine according to claim 1 or 2, characterized in that said at least one first dryer (301) is formed as an infrared radiation dryer (301).
4. The printing machine according to claim 1, 2 or 3, characterized in that at least one first cooling device (303) has at least one first cooling roller (304).
5. The printing machine according to claim 4, characterized in that a partial surface provided as a contact surface between said at least one first cooling device (304) and the printing material (02), of a lateral surface of said at least one first cooling roller (304), has a wrap angle around said at least one first cooling roller (304), which amounts to at least 180°, and/or that a cooling roller pressing device (306) is adjustable or adjusted in position against said one first cooling roller (304).
6. The printing machine according to claim 4 or 5, characterized in that said at least one first cooling roller (304) has a inherent drive motor (311) associated with said at least one first cooling roller (304).
7. The printing machine according to claim 5 and claim 6, characterized in that the drive motor (311) associated with said at least one first cooling roller (304) and said cooling roller pressing device (306) are part of a belt tension control and connected to a machine controller of the printing machine (01).
8. The printing machine according to claim 1, 2, 3, 4, 5, 6 or 7, characterized in that at least one ventilation aperture (313) connected to at least one air inflow line (317) is positioned between at least two radiation sources (302) of said at least one first dryer (301).
9. The printing machine according to claim 1, 2, 3, 4, 5, 6, 7 or 8, characterized in that at least one re-humidification device is positioned along the transport path of the printing material (02) after said at least one first dryer (301).
10. The printing machine according to claim 1, 2, 3, 4, 5, 6, 7, 8 or 9, characterized in that a partial surface provided as a contact surface between said at least one first central cylinder (201) and a printing material (02), of the lateral surface of said at least one first central cylinder (201), has a wrap angle around said at least one first central cylinder (201), which amounts to at least 270°.
11. The printing machine according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, characterized in that a first face printed by said at least one printing unit (200), of a printed material belt (02) between a last contact point of the printed material belt (02) with said at least one first central cylinder (201) of said at least one first printing unit (200) and an operation area of said at least one first dryer (301) is not in contact with any component of the printing machine (01).
12. The printing machine according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or 11, characterized in that a second face in contact with the first central cylinder (201) of said first printing mechanism (200), of the printed material belt (02) between a last contact point of the printed material belt (02) with said at least one first central cylinder (201) of said at least one first printing unit (200) and the operation area of said at least one first dryer (301) is in contact with at least one deflecting roller (214) of said at least one first printing unit (200) and/or is in contact with at least one deflecting roller (312) of said at least one first dryer (301).
13. The printing machine according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12, characterized in that a draw-in gap (119) formed by a traction roller (118) and a traction pressing device (117) is positioned along a transport path of a printing material belt (02) between a belt edge aligning device (114) having at least two registration rollers (116) and said at least one first central cylinder (201).
14. The printing machine according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 or 13, characterized in that at least one draw-in gap (119), a first pressing device gap (209), a first cooling roller gap (309), a second pressing device gap (409), a second cooling roller gap (339) and a draw-out gap (503) are positioned along a transport path of a printing material (02) through the printing machine (01).
15. The printing machine according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 or 14, characterized in that a tempering device of said at least one first dryer (301) has at least one component temperature-controlled by a liquid.

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