EP3286008B1 - Printing machine having at least one printing assembly and at least one dryer unit and a method for operating a printing machine - Google Patents

Description

The invention relates to a printing press with at least one printing unit and at least one dryer unit according to the preamble of claim 1.

Different printing processes are used in printing machines. Non-impact printing processes (NIP = non impact printing) are printing processes that do not require a fixed, i.e. physically unchangeable printing form. Such printing processes can produce different print images in each printing process. Examples of non-impact printing processes are ionographic processes, magnetographic processes, thermographic processes, electrophotography, laser printing and in particular inkjet printing processes or inkjet printing processes. Such printing methods usually have at least one imaging device, for example at least one printhead. In the case of the inkjet printing method, such a printhead is designed, for example, as an inkjet printhead and has at least one and preferably a plurality of nozzles, by means of which at least one printing fluid, for example in the form of ink drops, can be selectively transferred to a printing material. The printing material should be as constant as possible from the image-forming device, on the one hand, in order to be able to coordinate the time of image generation and, on the other hand, to avoid damage to the image-forming device.

For example, in the inkjet printing process, in particular in connection with water-based ink, it can happen that the printing material deforms, for example waves. On the one hand, such waves can increase the risk of Damage to both printheads and the printing substrate can result in poor print quality, for example due to the different flight times of drops of printing fluid.

Through the US 2012/0162299 A1 a printing unit is known which has a plurality of printing heads and fixed guide elements in the area of the printing heads.

Printing material that has been provided with a printing fluid is usually dried in a later process. Different devices are known to enable such a drying process. For example, an energy delivery device is arranged that can remove solvents and / or trigger crosslinking reactions. It is known to move the respective energy delivery device, for example for maintenance purposes, from an active position into a different storage position.

Through the US 2009/0013553 A1 a printing press with at least one dryer unit is known. The dryer unit has a dryer which can be moved into a maintenance position parallel to a plane occupied by the printing material within the dryer.

Through the CA 2 281 212 A1 a printing press with dryer is known which has hot air nozzles and can be pivoted about a pivot axis in order to be able to carry out maintenance work on a printing unit.

Through the EP 1 445 563 A2 a dryer is known which can be lifted upwards to draw in a web and can also be moved horizontally in order to carry out maintenance work on the rollers below the dryer.

Through the DE 10 2013 208 754 A1 is known a printing press with dryer, wherein a drawing-in means is described in the area of a printing unit.

Through the EP 2 047 992 A2 a printing press with dryer is known.

The DE 199 03 607 A1 shows a flexographic printing machine with radially adjustable dryer units.

The WO 2013/056292 A1 shows a printing press with a dryer which is movable together with a print head, the distance between which is adjustable.

The DE 10 2011 076899 A1 shows a printing machine with inkjet printhead, radiation dryer and cooling roller.

The invention has for its object to provide a printing press with at least one printing unit and at least one dryer unit.

The object is achieved by the features of claim 1.

A printing press has at least one printing unit and at least one dryer unit. The at least one dryer unit has at least one first dryer, which is preferably designed as at least one radiation dryer. The at least one first dryer has at least one first preferably controllable and / or regulatable energy delivery device. The at least one first energy output device is designed, for example, as at least one radiation source and / or at least one air supply line. The at least one Radiation source is designed, for example, as an infrared radiation source and / or as a radiation source for ultraviolet light and / or as a radiation source for electromagnetic radiation in the visible range and / or as a radiation source for microwave radiation. The at least one radiation source is preferably at least one controllable and / or regulatable radiation source. The at least one first energy delivery device is preferably designed for the targeted transfer of energy, in particular from the at least one first energy delivery device to a printing material which is arranged and / or can be arranged and / or can be arranged in an active region of the first energy delivery device, preferably at least partially provided with printing fluid. The at least one first energy delivery device is arranged to be movable, in particular relative to one for transporting web-shaped ones Media provided for the transport route. The area of action of the at least one first energy output device preferably intersects a transport path provided for the transport of web-shaped printing material. The at least one dryer is preferably designed as a radiation dryer.

The at least one first energy delivery device is arranged to be movable along an adjustment path between at least one action position and at least one shut-off position and more preferably two shut-off positions, in particular with respect to an adjustment direction. The travel path extends over at least 75% of its total distance, preferably over at least 90% of its total distance and more preferably over its entire total distance, continuously in a linear manner and / or counter to an actuating direction. The total distance is the maximum distance that the travel path between two points can be. In other words, the at least one first energy delivery device is arranged to be movable along an at least 75%, preferably at least 90%, and more preferably completely linear adjustment path in and / or against an adjustment direction between at least one active position and at least one shut-off position and further preferably two different shut-off positions . This means, in particular, that the actuating path along its entire distance is preferably linear at least 75%, more preferably at least 90% and even more preferably 100% of this total distance and without any intermediate deviation and at the same time in or against the actuating direction. Deviations from this setting direction are only conceivable at the beginning and / or at the end of the travel.

The setting direction preferably deviates from at least one horizontal direction by at most 40 °, more preferably at most 30 °, even more preferably at most 15 ° and even more preferably at most 5 °. The setting direction also deviates from a normal direction by preferably at most 40 °, more preferably at most 30 °, even more preferably at most 15 ° and even more preferably at most 5 °, this Normal direction is a normal direction of an average surface normal of an entire section of a transport path provided for web-shaped printing material that is located in an in particular entire area of influence of the at least one first energy output device. The normal direction of the mean surface normal is determined as an average over all directions of surface normals from tangent planes to all surface elements of the transport path provided for the printing material, which are in the area of action of the at least one first energy output device. The adjustment path is in particular the path along which an at least one geometric center of gravity of the movable component, in particular of the first dryer 301, is moved and / or can be moved. For example, the adjustment path is the path along and / or parallel to which the at least one energy output device 302 is moved and / or can be moved.

An advantage is that in this way, by appropriately turning off the energy delivery device, in particular from the transport route provided for the printing material, a space can be created into which an operator can reach and / or an operator can enter, for example by at least to maintain an energy delivery device and / or to obtain access to a section of the transport path of the printing material arranged within the exposure region. Particularly in the case of wide printing material webs, it pays off that the adjustment direction makes a necessary positioning path independent of the width of the printing material web. Another advantage is that a shutdown in the direction of adjustment allows a printing material web to be drawn in through the at least one first dryer, even with a very small adjustment path. In particular, this can accelerate a pull-in process because less time is required than if the at least one energy output device would always have to be moved to a relatively far away position. One advantage of an essentially horizontal adjustment direction is that an upright operator has sufficient space available, even with a relatively short adjustment path, in particular independently of the width of the substrate.

The printing press is preferably characterized in that at least temporarily and preferably permanently at least one and preferably exactly one, preferably endless, retractable retraction means for retracting a printing material web is arranged within the at least one dryer unit and more preferably also within the at least one printing unit, and / or can be arranged. An arrangement within the dryer unit is to be understood in particular to mean that a projection of the at least one drawing-in means in or against an axial direction or transverse direction intersects an area of action of the at least one energy output device. The axial direction or transverse direction preferably extends parallel to an axis of rotation of at least one printing material guide element of the printing press and in particular of the dryer unit.

The printing machine is preferably characterized in that at least parts of the at least one retraction path and more preferably the entire retraction path are at a distance of at least 2 cm in relation to each target area of each nozzle of each printhead of this at least one printing unit, in relation to the axial direction or transverse direction. Preferably, at least parts of the at least one retraction path and preferably the full retraction path have a distance of at least 2 cm, more preferably at least 4 cm, even more preferably at least 6 cm, and in relation to each target area of each nozzle of each printhead of this at least one printing unit even more preferably at least 8 cm. Preferably, at least parts of the drawing-in means and more preferably the complete drawing-in means have a distance of at least 2 cm, more preferably at least 4 cm, even more preferably at least 6 cm and even more in relation to each target area of each nozzle of each printhead of this at least one printing unit in relation to the axial direction preferably at least 8 cm. This results in particular in combination with the possible actuating movement of the at least one energy delivery device of the at least one A first dryer has the advantage that a printing material web can be drawn into the printing press particularly easily and quickly and precisely and yet there is no danger that damage and / or soiling of nozzles of print heads and / or components of the dryer unit could occur.

The printing press is preferably characterized in that at least one printing material web is connected and / or connectable to the at least one drawing-in means via at least one connecting element, further preferably the at least one connecting element being designed as at least one drawing-in tip. The printing press is preferably characterized in that the at least one drawing-in means is designed as at least one endless drawing-in belt and / or in that at least one drawing-in guide element is arranged, by means of which the at least one drawing-in path of the at least one drawing-in means can be fixed and / or fixed, further preferred the at least one pull-in guide element is designed as at least one deflection roller or as at least one chain rail and / or the at least one pull-in guide element is designed as at least one rotatable pull-in guide element.

The at least one drawing-in means for drawing in a printing material web along the intended transport path of the printing material web is preferably arranged in particular permanently along its at least one drawing-in path within the printing press. The at least one drawing-in means preferably has at least two and more preferably at least five provided connection points at which at least one printing material web can be connected directly and / or via at least one connecting element to the at least one drawing-in means. The printing machine is preferably characterized in that the at least two connection points are at a distance of at most 10 cm, more preferably at most 5 cm, still more preferably at most 2 cm and still more preferably have no spacing from one another in relation to the axial direction, and / or that the at least two connection points are spaced apart from one another along the at least one pull-in path.

Before the printing material web is drawn in by the at least one printing unit, at least one printing head of the at least one printing unit designed as an inkjet printing head is shut off from the intended transport path of the at least one printing material web. Thereafter, in a sub-process of a drawing-in process, at least one drawing-in means is preferably moved along a drawing-in path through the at least one printing unit and the at least one printing material web is thereby drawn along the transport path provided for the at least one printing material web. The pull-in path and the transport path are preferably spaced apart from one another as seen in an axial direction.

As an alternative or in addition, the printing press is preferably characterized in that at least two parking positions of the at least one first energy output device, which are different in particular with respect to the actuating direction, are provided, in which the at least one first energy output device can be arranged in a targeted manner depending on the operating mode. The at least two parking positions provided are preferably provided in addition to the at least one working position. For example, one of the parking positions is a retracted position and / or one of the parking positions is an access position. For example, a shortest distance between the at least one first energy delivery device and the transport path provided for the printing material is greater when the first energy delivery device is arranged in the access position than when the first energy delivery device is arranged in the retracted position. In particular, a shortest distance between the at least one first energy delivery device and the transport path provided for the printing material is greater with the first energy delivery device arranged in the retracted position than with the first energy delivery device arranged in the action position, preferably by at least 5 mm, more preferably by at least 50 mm and even further preferably by at least 90 mm and independently of it, for example by at most 400 mm. A shortest distance between the at least one first energy output device and is preferred the transport path provided for the printing material when the first energy delivery device is arranged in the access position is greater than when the first energy delivery device is arranged in the active position, preferably by at least 450 mm, more preferably by at least 600 mm and even more preferably by at least 700 mm.

As an alternative or in addition, the printing press is preferably distinguished by the fact that the at least one printing unit has at least two image-forming devices, in particular in the form of print heads. According to the invention, the printing press is characterized in that the at least one printing unit has at least one inkjet print head and more preferably at least two inkjet print heads.

Preferably, the printing press is alternatively or additionally characterized in that a linear connection between a first guide element, related to a printing section of the transport path intended for printing material, of the at least one printing unit arranged upstream of the at least one dryer unit, and a reference to the printing section of the transport path intended for printing material The last guide element of the at least one pressure unit arranged upstream of the at least one dryer unit, the main conveying direction of the at least one pressure unit arranged upstream of the at least one dryer unit, with guide elements of this at least one pressure unit arranged in their working position having an upward-pointing component. For example, the printing press is alternatively or additionally characterized in that the intended transport path is curved in one direction only, in particular convexly, apart from straight sections, from a start of the printing section in the at least one printing unit to an end of the area of action of the at least one first energy output device on the side of the printing material printed in the at least one printing unit. One advantage is then that after an ascending course of the transport path of the printing material through the at least one printing unit enables a substantially downward transport path through the at least one dryer, a freshly printed side of the printing material between the printing unit and dryer not having to come into contact with components of the printing press. As an alternative or in addition, the printing press is preferably distinguished in that a transport direction provided for the web-shaped printing material has a vertical component in the area of action of the at least one energy output device, which component points downward.

As an alternative or in addition, the printing press is preferably distinguished by the fact that the at least one printing unit has at least two ink-jet printing heads, by means of which job locations for printing fluid are defined, and that a transport path through the printing unit, which is intended for printing material, is defined by at least two fixed guide elements of the at least one printing unit and that a printing section of the transport path provided for printing material begins at a first application point of the printing unit along this transport path and ends at a last application point of the printing unit along this transport path, and that at least five fixed guide elements defining the intended transport path along the printing section of this transport path are arranged one behind the other.

Preferably, the printing press is alternatively or additionally characterized in that at least one measuring roller and / or at least one first deflecting roller is arranged along the transport path provided for the printing material after the area of action of the at least one first energy output device, which is preferably of the transport path provided for the printing material and / or is wrapped around by the printing material. As an alternative or in addition, the printing press is preferably distinguished in that at least along the transport path provided for the printing material in front of the area of action of the at least one first energy output device a first pull roller is arranged, which is assigned at least one separate drive motor and which is preferably wrapped around by the transport path intended for the printing material and / or the printing material and / or that along the transport path provided for the printing material after the area of action of the at least one first energy output device and / or after the at least one measuring roller and / or after the at least one first deflecting roller at least one second pulling roller is arranged, which is preferably wrapped around by the transport path intended for the printing material and / or the printing material. One advantage is that a web tension within the dryer can be measured and / or influenced and / or maintained in a targeted manner. As an alternative or in addition, the printing press is preferably characterized in that the at least one second drawing roller and / or the at least one measuring roller and / or the at least one first deflecting roller is designed as at least one cooling roller. One advantage is that a high energy input in the dryer is possible because the printing material is then cooled again and damage to the printing material is kept to a lesser extent than if the printing material were kept at correspondingly high temperatures.

Preferably, the printing press is alternatively or additionally characterized in that at least one, but preferably several, for example at least three, more preferably at least five and even more preferably at least nine pressure rollers are each individually pressed against the at least one second pull roller. One advantage then is that an improvement in the contact of the printing material with the second draw roller can be achieved, which on the one hand makes it easier to influence the web tension and on the other hand enables improved heat transfer to the cooling roll.

As an alternative or in addition, the printing press is preferably characterized in that at least one actuator is arranged, by means of which a movement of the at least one an energy delivery device can be carried out along the actuating path. The at least one actuator is designed, for example, as at least one hydraulic and / or as at least one pneumatic drive. The at least one actuator is preferably designed as at least one electric drive and / or further preferably has at least one threaded spindle and at least one threaded nut interacting with it. One advantage then is that particularly simple and precise actuating movements and positioning can be carried out.

The printing machine, which has at least one first printing unit, is preferably characterized in that the at least one dryer unit with the at least one first dryer is arranged along the transport path provided for the printing medium after the at least one first printing unit, and has an area, in particular designed as a drying section, of the for printing medium provided intended transport path, which is defined by the area of action of the at least one dryer. Preferably, in at least half and more preferably in at least 75% of the entire drying section of the transport path provided for the printing material, a transport direction provided for the printing material has at least one vertical, preferably downward-pointing component which is larger than any horizontal component of this transport direction which may be present . This results in a particularly secure construction, because even when the printing material web is at a standstill and / or torn, the printing material is prevented from lying directly over and / or on hot components of the dryer and being damaged or even catching fire.

The axial direction or transverse direction is preferably defined by an axis of rotation of the at least one first draw roller and / or an axis of rotation of the at least one second draw roller. The setting direction of the at least one energy output device is preferably linear. The setting direction of the at least one energy output device deviates from the axial direction or transverse direction at least 50 °, preferably at least 60 °, more preferably at least 75 ° and even more preferably at least 85 °. Preferably, the setting direction of the at least one energy output device simultaneously deviates from at least one horizontal direction by at most 40 °, preferably at most 30 °, more preferably at most 15 ° and even more preferably at most 5 °.

The radiation emitted by the at least one energy output device preferably removes solvent and / or moisture from the printing material web and / or from the printing fluid arranged thereon and is absorbed by the ambient air in an interior of the at least one first dryer. The transport path of the printing material web runs through this interior of the at least one first dryer. For example, in order to achieve a permanently high drying performance, temperature control of components of the at least one first dryer and / or ventilation of the interior of the at least one first dryer is ensured. For this purpose, at least one ventilation device is preferably arranged in the area of the at least one energy output device. The at least one dryer is preferably at least designed as a flow dryer. In an exemplary alternative embodiment, the at least one dryer is designed exclusively as a flow dryer.

The ventilation device preferably has at least one air supply line and at least one air discharge line. The at least one first dryer is thus preferably also designed as a flow dryer in addition to its design as a radiation dryer. The at least one air supply line is preferably arranged along the transport path provided for printing material between at least two air discharge lines. The at least one air supply line is preferably at least one energy output device and at least one radiation source is also at least one energy output device. The at least one air supply line and / or the at least one air discharge line preferably each have at least one flexible region with which they are connected to a stationary air transport device.

As an alternative or in addition, the printing press is preferably distinguished by the fact that at least one shut-off device is arranged, by means of which a security area can be separated and / or separated from an environment. The security area is preferably such an area that comprises at least each volume that can be taken up by the at least one energy delivery device and possibly also by at least one dryer frame carrying the at least one energy delivery device during the movements along the travel path. The security area also preferably comprises a larger room area. The security area can preferably be entered from an environment through at least one closable opening in the shut-off device. This at least one opening can preferably be closed by means of a locking device, for example at least one door. A movement of the at least one energy delivery device, in particular out of the active position and / or its access position and / or its retracted position, is only possible when the at least one closure device is closed and / or when a signal transmitter arranged outside the security area is operated. The at least one closure device is preferably only to be opened if the at least one energy delivery device is arranged in its access position.

As an alternative or in addition, the printing press is preferably distinguished in that the at least one printing unit has at least two image-forming devices, in particular in the form of print heads, by means of which job locations for printing fluid are defined. Preferably, at least two guide elements of the printing unit define, in particular, a first transport path through the printing unit provided for printing material. These at least two guide elements are furthermore preferably at least two preferably fixed guide elements of the printing assembly. A printing section of the printing substrate preferably begins provided transport path at a first job of the printing unit along this intended transport path and this printing section ends at a last job of the printing unit along this transport path. The fixed guide elements make it particularly easy to set up. It is also possible to realize very large printing widths without having problems with sagging guide elements. A print head is preferably an image-forming device for a non-impact printing process, that is to say a printing process without a fixed printing form.

The printing unit is preferably characterized in that at least two, preferably at least five, more preferably at least eight, even more preferably at least ten, even more preferably at least fourteen and even more preferably at least twenty-eight fixed, along the printing section of this intended transport path, also include the intended transport path defining guide elements are arranged one behind the other. This has the particular advantage that a particularly large number of print heads and thus a high printing speed and high printing quality can be realized.

A fixed guide element is to be understood in particular as a guide element which is arranged immovably and / or stationary in a printing operation and / or which can be rotated neither by its own drive nor by contact with printing material and / or which is related to rotational movements and / or Rotational movements and / or pivoting movements about axes which are oriented orthogonally to a transport direction of the transport path provided for printing material, at most for pivoting movements together with other guide elements around at least one common pivot axis. In particular, the at least one printing unit is preferably distinguished by the fact that preferably the at least two and more preferably the at least five, in particular stationary guide elements with respect to rotary movements or pivoting movements about axes other than at least a common pivot axis are fixed guide elements. The stationary guide elements are preferably, in particular, stationary guide elements.

As an alternative or in addition, the printing unit is preferably distinguished by the fact that the at least two and more preferably at least five fixed guide elements each have a deflection angle with respect to the transport path provided for printing material, which is at least 0.5 °, more preferably at least 1 ° and even more preferably at least 1.5 ° and which is preferably at most 5 °, more preferably at most 3 ° and even more preferably 2.5 °. This results in particular in the advantage that a particularly flat course of the print section of the intended transport path can be realized and thus a large number of print heads can be arranged one behind the other. In addition, with a small deflection angle, friction between the printing material and the, in particular, stationary guide elements is reduced.

A transverse direction is preferably a horizontal direction oriented orthogonally to the transport path provided for printing material through the at least one printing unit. As an alternative or in addition, the printing unit is preferably distinguished by the fact that the at least two and preferably at least five stationary guide elements each have a radially symmetrical or even circular cross section over more than half of their extent in the transverse direction. Radial symmetry or rotational symmetry is to be understood as a form of symmetry in which the rotation of an object by a certain angle of rotation about an axis, in particular an axis of rotation or axis of symmetry, brings this object back into alignment with itself. As an alternative or in addition, the printing unit is preferably distinguished by the fact that a respective outer surface of the at least two and preferably at least five guide elements, in particular, is formed in the shape of a cylinder jacket at least within a working area of the printing unit. This results in particular in the advantage that the guide elements simply wear out by a certain amount, for example, when their surface sections coming into contact with the printing material wear predetermined angle rotated can be reinstalled or fixed and used again. With a very small deflection angle, there is a particularly large number of possible renewed uses of the web guiding elements.

Preferably, the printing unit is alternatively or additionally characterized in that these at least two and preferably at least five transport paths provided for this are arranged in the region of the printing section with fixing guide elements pivotable about at least one pivot axis common to them, in particular around these at least two and preferably at least five guide elements between a respective work position and a respective maintenance position. These at least two and preferably at least five transport paths provided for this purpose are preferably arranged in the region of the printing section with fixing guide elements by means of at least one swivel drive and / or in at least one joint movement and / or relative to the at least two printheads so as to be pivotable about the at least one swivel axis common to them. This has the particular advantage that a maintenance room, in particular for cleaning a shielding device and / or the guide elements, can be created. Preferably, the printing unit is alternatively or additionally characterized in that these at least two and more preferably at least five guide elements are arranged so as to be pivotable about a pivot angle about the at least one pivot axis common to them, which is at least 10 °, more preferably at least 20 ° and even more preferably at least Is 30 °.

The printing unit is preferably characterized alternatively or additionally in that a main conveying direction, which is defined by a straight connection between a first guide element related to the printing section of the transport path intended for printing material and a last guiding element related to the printing section of the transport path intended for printing material, is oriented orthogonally to the transverse direction and that the main conveying direction with guide elements arranged in its maintenance position is at an angle of at most 30 °, more preferably at most 20 ° and is more preferably arranged at most 10 ° to a vertical direction. This has the particular advantage that the maintenance space becomes particularly large and the guide elements are particularly accessible in their maintenance position. In particular, large printing material widths or working widths of the printing unit can be realized in this way.

As an alternative or in addition, the printing unit is preferably distinguished by the fact that the main conveying direction, with guide elements arranged in its working position, is at an angle of at least 10 °, more preferably at least 20 ° and even more preferably at least 30 ° and in particular independently of it at most 70 °, further preferred is aligned at most 55 ° and even more preferably at most 40 ° to a horizontal plane. This results in particular in the advantage that even the lowest printheads are not arranged too obliquely and that an increasing course of the printing section is nevertheless made possible. As a result of the increase, it is possible to run the web directly through a dryer essentially from the top downwards, without bringing deflecting agent into contact with the freshly printed side of the web. As an alternative or in addition, the printing unit is preferably distinguished by the fact that the transport path provided for printing material along the printing section is curved only in one direction, in particular downwards and / or convexly with respect to the side of the printing material printed in the at least one printing unit. A downward curvature does not conflict with an upward transport route, but rather means, for example, an increase in the course of the transport route, which increases continuously or gradually. As an alternative or in addition, the printing unit is preferably distinguished by the fact that the transport path provided for printing material along the printing section is limited and / or contacted and / or affected by components of the printing unit exclusively on exactly one side.

The printing unit is preferably characterized alternatively or additionally in that the at least two printheads each have a plurality of nozzles and that, more preferably, at least one nozzle per printhead has a target area which intersects at least and more preferably exactly one of the in particular at least two and more preferably at least five preferably fixed guide elements. This preferably applies in particular with the respective print head arranged in its printing position and with the respective guide element arranged in its working position. This preferably applies alternatively or additionally to a plurality or more preferably all of the nozzles of the respective printhead. This results in particular in the advantage that the printing fluid is applied to the printing material in an area in which it is particularly flat because it is pulled against the corresponding guide element by the deflection angle. In particular, water-based printing fluid basically causes the printing material to swell, which can lead to deformations, in particular corrugations, of the printing material. This is particularly critical in connection with non-full-area and / or variable print images. By aligning the nozzles to the guide elements and thus to the flat areas of the printing material, printing errors and / or damage to the nozzles arranged at a short distance on the intended transport path are thus reduced and / or avoided. In particular insofar as such deformations do not occur to a great extent, all the nozzles can also have target areas which do not intersect any of the guide elements, in particular at least two and more preferably at least five, preferably fixed guide elements, but only pass between the guide elements and the guide elements.

Preferably, the printing unit is alternatively or additionally characterized in that at least one of the at least two and preferably at least five transport routes provided for this in the region of the printing section with fixing guide elements at three points spaced apart in the transverse direction, preferably designed as support areas, with a total of at least two lateral support elements and is in contact with at least one inner support element and thereby in its position is set. Further preferably, the printing unit is alternatively or additionally characterized in that several or even more preferably all of the at least two and preferably at least five transport routes provided for this in the region of the printing section with fixing guide elements at three points spaced apart from one another in the transverse direction, preferably in the form of support areas a total of at least two lateral support elements and at least one inner support element are in contact and are thus fixed in their position, the plurality or more preferably all guide elements in each case being in contact with the same lateral and / or inner support elements. This also results in a supporting effect on the guide elements between the outer ends of the guide elements, which therefore have less or no tendency to be bent by gravity and / or the web tension. Such a deflection would otherwise have a particular impact on the distance between the nozzles and the substrate. This ensures high print image quality even with large web widths. The printing unit is preferably characterized alternatively or additionally by the fact that the at least one inner support element is in contact with the at least one guide element at a point which is preferably designed as a support area, the position of which in relation to the transverse direction is related to the position of at least one nozzle of at least one printhead of the printing unit matches.

The printing unit is preferably characterized alternatively or additionally by the fact that the at least one drawing-in means for drawing in a printing-material web is arranged and / or can be arranged within the at least one printing set, at least temporarily, at least temporarily along the at least one drawing-in path and more preferably different from any printing material. This results in particular in the advantage that a particularly simple and safe insertion of printing material into the printing unit and / or the printing machine is made possible, which is particularly important for large web widths.

As an alternative or in addition, the printing unit is preferably distinguished by the fact that the printing unit has at least one, in particular, stationary frame or machine frame and that the printing unit has the at least one first transport path provided for printing material webs and defined by at least two guide elements and at least one path that can be moved relative to the frame , in particular has a pivotable support element and that at least one first web fixing device for fixing a first section of a printing material web is arranged relative to the first web fixing device and / or relative to the frame along this first provided transport path. In particular, fixing is not only to be understood as supporting against gravity, but rather relative immobility, in particular with regard to any movement in any direction. Preferably, the printing unit is alternatively or additionally characterized in that, along this first intended transport path and in particular after the at least one first web fixing device, at least one support element connected to the at least one support element that is movable relative to the frame and at least jointly with this at least one movable element relative to the frame The support element, which is also movable relative to the frame, is arranged for fixing a second section of a printing material web relative to the second web fixing device and / or relative to the at least one movable support element. The at least one first web fixing device is preferably arranged on the frame.

The printing unit is preferably characterized alternatively or additionally by the fact that the at least two guide elements, which define the first transport path intended for printing material, are arranged to be movable, in particular pivotably, together with the at least one support element, preferably at least one support element, on the frame. As an alternative or in addition, the printing unit is preferably distinguished in that the at least one support element can be pivoted about the at least one common pivot axis together with the at least one second web fixing device and / or together with the at least two guide elements is arranged. The at least one second web fixing device is preferably arranged to be movable independently of the at least one first web fixing device. As an alternative or in addition, the printing unit is preferably distinguished by the fact that the second web fixing device, in particular together with the at least two guide elements, can be moved relative to the first web fixing device and that a distance between the at least one second web fixing device and the at least one first web fixing device can be changed. As an alternative or in addition, the printing unit is preferably distinguished by the fact that the at least one first web fixing device is arranged on the frame of the printing unit. As an alternative or in addition, the printing unit is preferably distinguished by the fact that an optionally available maximum adjustment path of the at least one first web fixing device is smaller than one tenth of a maximum adjustment path of the at least one second web fixing device.

Preferably, the printing unit is alternatively or additionally characterized in that the at least one second web fixing device can be arranged, in particular together with the part of the second section of the at least one printing substrate web fixed thereto, at different distances from the at least one image-forming device which is preferably designed as a print head.

As an alternative or in addition, the printing unit is preferably distinguished by the fact that the printing unit has at least two image-forming devices, by means of which the respective application points for printing fluid are defined and that a printing section of the first transport path provided for printing material begins at a first application point of the printing unit along this transport path and ends at a last job of the printing assembly along this intended transport path and that along this provided transport path the at least two guiding elements defining the intended transport path one behind the other along the printing section of this first provided transport path are arranged.

The printing unit is preferably characterized alternatively or additionally in that at least one separating device and / or at least one connecting device is arranged along the intended transport path between the at least one first web fixing device and the at least one second web fixing device. As an alternative or in addition, the printing unit is preferably characterized in that the first section of the printing material web and the second section of the printing material web belong to the same printing material web at least before a possible severing.

As an alternative or in addition, the printing unit is preferably distinguished by the fact that the at least one first web fixing device and / or the at least one second web fixing device is or are designed as a suction device. As an alternative or in addition, the printing unit is preferably distinguished in that the at least one first web fixing device and / or the at least one second web fixing device is or are designed as a clamping device.

Preferably, the printing unit is alternatively or additionally characterized in that the at least one first web fixing device and the at least one second web fixing device along the transport path provided for printing material from a roll holding device and / or from a post-processing device at least twice, more preferably at least five times and even more preferably at least are ten times as far as from a printing unit's nearest job location.

The invention is for inkjet printing processes or Ink printing process applicable. In the foregoing and below, the designs and variants set out for "printing inks" - as far as no obvious contradiction is evident - can be used on all types of flowable printing fluids, in particular also on colored or colorless varnishes, and on relief-forming materials such as pastes and by - only intended or actual - replacement of the expression "printing ink" by the general expression "printing fluid" or a special expression "lacquer", "higher-viscosity printing ink", "low-viscosity printing ink" or "ink", or "paste" or "pasty material" transfer.

A preferred method for operating a printing press can be carried out in particular by means of the printing press. This is a method for operating the printing press, the printing press having the at least one first printing unit and the at least one dryer unit, and the at least one dryer unit having the at least one first dryer with at least the first energy output device. In a first shutdown process, the at least one first energy delivery device is preferred, in particular by means of the at least one actuator along an actuating path in the actuating direction from the active position by at least 5 mm, preferably by at least 50 mm and further preferably by at least 90 mm and independently of this, for example by at most 400 mm moved to the retracted position and stopped there. The actuation path extends over at least 75% of its total distance, preferably over at least 90% of its total distance and more preferably over its entire total distance, continuously linearly in and / or against the actuating direction. In other words, in the first shutdown process, the at least one energy delivery device is preferably moved by at least 5 mm, preferably by at least 50 mm and further preferably by at least 90 mm and in particular by means of the at least one actuator from the active position in the adjusting direction along the at least 75% linear adjustment path regardless of this, for example, moved to the retracted position by a maximum of 400 mm and stopped there. For the first one The shutdown process preferably does not use the entire travel path, in particular not the total distance of the travel path, but less than 25%, more preferably less than 10%.

In a pulling-in process which then takes place, at least one web-shaped printing material is drawn in by means of at least one drawing-in means, in particular different from each printing material, along the transport path provided for the printing material through the area of action of the at least one energy output device. Further preferably, in a first resetting process that takes place afterwards, the at least one first energy output device is moved back from the retracted position against the adjusting direction along the same linear adjustment path into the acting position, in particular by means of the at least one actuator, and stopped there. As described, the setting direction also deviates from the normal direction by at most 40 °, preferably at most 30 °, more preferably at most 15 ° and even more preferably at most 5 °, this normal direction being the normal direction of the mean surface normals of the entire area, in particular the entire area of action of the at least a first energy output device lying section of the transport path provided for web-shaped printing material.

Preferably, between the first shutdown process and a second shutdown process in at least one drying process in the area of action of the first energy delivery device, energy is released from the at least one first energy delivery device onto the previously drawn web-shaped printing material. It was further preferred that the previously drawn web-shaped printing material was at least partially provided with at least one printing fluid in the at least one printing unit.

In a second shutdown process that takes place later, in particular, the at least one first energy output device is preferred along the same Over at least 75%, more preferably at least 90% and even more preferably 100% of its total distance, continuously and linearly in and / or against the adjustment direction S, in the same adjustment direction from the active position, in particular by means of the at least one actuator, by at least 450 mm preferably moved by at least 600 mm and even more preferably by at least 700 mm into an access position different from the retracted position and stopped there. In a first maintenance operation taking place afterwards, at least one maintenance action is preferably carried out on the at least one first energy output device, for example an exchange of at least one current-carrying component and / or a cleaning of a component. Further preferably, in a second resetting process that takes place afterwards, the at least one first energy output device is moved back from the access position against the adjusting direction along the same linear adjustment path into the acting position and stopped there, in particular by means of the at least one actuator.

The method is preferably characterized in that the at least one drawing-in means is connected to the at least one printing material web in one connection process by means of at least one connecting element. Preferably, the at least one connecting element passes a printing position of the at least one printhead while it is switched off from the intended transport path and / or is arranged in at least one rest position and / or the at least one connecting element passes at least one target area of at least one nozzle of the at least one printhead during the pulling-in process and / or during the pulling-in process, no component of the at least one pulling-in means passes a target area of a nozzle of the at least one printhead. The at least one connecting element preferably passes through an active region of the at least one energy delivery device of the at least one first dryer while the latter is in a storage position designed as a retracted position. Preferably, only at least one pull-in means is used that relates to the axial direction on only one side of the intended one Transport path for printing material is arranged and / or its feed path runs only on one side of the intended transport path for printing material.

Exemplary embodiments of the invention are shown in the drawings and are described in more detail below.

Fig. 1

eine schematische Darstellung eines Transportwegs für Bedruckstoff durch ein Druckaggregat und einen Trockner;

Fig. 2

eine schematische Darstellung einer Umlenkung einen Bedruckstoffs an einem Leitelement;

Fig. 3

eine schematische Darstellung einer Menge von Leitelementen, die durch einen gemeinsamen Tragrahmen gehalten sind;

Fig. 4

eine schematische Darstellung eines Teils eines Druckabschnitts;

Fig. 5a

eine schematische Darstellung eines Druckaggregats mit Leitelementen in einer Arbeitsposition und Druckköpfen in einer Druckposition;

Fig. 5b

eine schematische Darstellung des Druckaggregats gemäß Fig. 1a mit Leitelementen in einer Arbeitsposition und Druckköpfen in einer Abstellposition;

Fig. 5c

eine schematische Darstellung des Druckaggregats gemäß Fig. 1a mit Leitelementen in einer Wartungsposition und Druckköpfen in einer Druckposition;

Fig. 6a

eine schematische Darstellung einer Trocknereinheit einer Druckmaschine, wobei eine Energieabgabeeinrichtung in einer Einwirkposition angeordnet ist;

Fig. 6b

eine schematische Darstellung eine schematische Darstellung einer Trocknereinheit einer Druckmaschine, wobei eine Energieabgabeeinrichtung in einer als Zugangsposition ausgebildeten Abstellposition angeordnet ist und wobei ein Bedruckstoff oder zumindest dessen vorgesehener Transportweg eingezeichnet ist;

Fig. 6c

eine schematische Darstellung eine schematische Darstellung einer Trocknereinheit einer Druckmaschine, wobei eine Energieabgabeeinrichtung in einer als Einziehposition ausgebildeten Abstellposition angeordnet ist;

Fig. 7a

eine schematische perspektivische Darstellung einer Trocknereinheit einer Druckmaschine, wobei eine Energieabgabeeinrichtung in einer Einwirkposition angeordnet ist;

Fig. 7b

eine schematische perspektivische Darstellung einer Trocknereinheit einer Druckmaschine, wobei eine Energieabgabeeinrichtung in einer als Einziehposition ausgebildeten Abstellposition angeordnet ist.

Show it:

Fig. 1

a schematic representation of a transport path for printing material through a printing unit and a dryer;

Fig. 2

a schematic representation of a deflection of a printing material on a guide element;

Fig. 3

a schematic representation of a set of guide elements, which are held by a common support frame;

Fig. 4

a schematic representation of a part of a printing section;

Fig. 5a

a schematic representation of a printing assembly with guide elements in a working position and printheads in a printing position;

Fig. 5b

a schematic representation of the printing unit according to Fig. 1a with guide elements in a working position and print heads in a storage position;

Fig. 5c

a schematic representation of the printing unit according to Fig. 1a with guide elements in a maintenance position and printheads in a printing position;

Fig. 6a

1 shows a schematic representation of a dryer unit of a printing press, wherein an energy delivery device is arranged in an active position;

Fig. 6b

a schematic representation a schematic representation of a dryer unit of a printing press, wherein an energy output device is arranged in a parking position designed as an access position and wherein a printing material or at least its intended transport path is shown;

Fig. 6c

a schematic representation a schematic representation of a dryer unit of a printing press, an energy output device being arranged in a storage position designed as a retracting position;

Fig. 7a

is a schematic perspective view of a dryer unit of a printing press, wherein an energy output device is arranged in an active position;

Fig. 7b

is a schematic perspective view of a dryer unit of a printing press, wherein an energy output device is arranged in a storage position designed as a retracting position.

The term “printing fluid” includes in the foregoing and below inks and printing inks, but also varnishes and pasty materials. Preference is given to printing fluid materials which are transferred and / or are transferable to a printing material 02 by a printing press 01 or at least one printing unit 200 of the printing press 01 and are preferably in a finely structured form and / or not only over a large area, and are preferably visible and / or through sensory impressions Establish noticeable and / or machine-detectable texture on the substrate 02. Inks and printing inks are preferably solutions or dispersions of at least one colorant in at least one solvent. Water, for example, comes as a solvent and / or organic solvents. Alternatively or additionally, the pressure fluid can be designed as a pressure fluid that crosslinks under UV light. Inks are relatively low viscosity printing fluids and inks are relatively high viscosity printing fluids. Inks preferably have no binder or relatively little binder, while printing inks preferably contain a relatively large amount of binder and more preferably further auxiliaries. Colorants can be pigments and / or dyes, pigments being insoluble in the application medium, while dyes are soluble in the application medium.

For the sake of simplicity, the expression "printing ink" or "printing fluid" in the sense of a liquid or at least flowable coloring fluid to be printed in the printing press should be understood in the foregoing and below - unless explicitly differentiated and named accordingly - and not only colloquially Rather higher-viscosity coloring fluids associated with the expression "printing ink" for use in rotary printing presses, but in addition to these higher-viscosity coloring fluids in particular also low-viscosity coloring fluids such as "inks", in particular inkjet inks, but also pulverulent coloring fluids such as e.g. B. toner. Thus, in the foregoing and in the following, in particular, also colorless lacquers are meant when it comes to printing fluids and / or inks and / or printing inks. In the foregoing and in the following in particular, means for a pre-treatment (so-called precoating) of the printing substrate 02 are preferred when printing fluids and / or inks and / or printing inks are mentioned. As an alternative to the term pressure fluid, the term coating agent is to be understood synonymously.

A printing machine 01 is to be understood here as a machine that is capable of applying or capable of applying at least one printing fluid to a printing substrate 02. A printing press 01 preferably has at least one printing material source, preferably at least one first printing unit 200, preferably at least one first agent that supports drying, ie first drying aid 301, e.g. B. a first dryer 301, and preferred at least one post-processing device. The printing press 01 optionally has, for example, at least one second printing unit and, for example, at least one second drying aid, ie drying aids, e.g. B. a second dryer. The printing press 01 is designed as an inkjet printing press 01. The printing press 01 is preferably designed as a roll inkjet printing press 01. The printing press 01 is designed as a printing press 01, which works as a whole or possibly alongside other non-impact printing processes and / or printing form-based processes, in particular as an inkjet printing press 01. The at least one first printing unit 200 is preferably at least a first Inkjet printing unit 200 is formed. In particular, the printing unit 200 is preferably a printing unit 200 for processing web-shaped printing material 02.

In the case of a web printing press 01, the printing material source is designed as a web unwinding device. At least one printing material 02 is preferably aligned in the printing material source, preferably at least with respect to an edge of this printing material 02. In the roll unwinding device of a roll printing machine 01, at least one web-shaped printing material 02, i.e. a printing material web 02, preferably a paper web 02, is unwound from a printing material roll 101 and preferably aligned with respect to their edges in an axial direction A. The axial direction A is preferably a direction A, which extends in a transverse direction A parallel to an axis of rotation of a printing material roll. The transverse direction A is preferably a horizontally running direction A. The transverse direction A is oriented orthogonally to the intended transport direction of the printing material 02 and / or orthogonally to the intended transport path of the printing material 02 through the at least one first printing unit 200. A transport path of the at least one printing substrate 02 and in particular the printing substrate web 02 preferably runs through the at least one first printing unit 200 following the at least one printing substrate source, where the Printing material 02 and in particular the printing material web 02 is preferably provided on one side with a printed image by means of at least one printing ink.

In the case of a curved transport path, the transport direction is preferably that direction which is tangential to a section and / or point of the intended transport path closest to a respective reference point. This respective reference point is preferably at the point and / or on the component that is related to the transport direction.

The invention is described below using an inkjet printing machine 01.

Preferably, the roll unwinding device along the intended transport path of the printing material web 02, after a roll holding device, has a dancer roll, which is preferably deflectable on a dancer lever, and / or a first web edge aligner and / or a feed nip formed by a pull roller and a pull press and a first measuring roller, in particular a feed measuring roller trained first measuring device having feed mechanism. This pull roller preferably has its own drive motor designed as a pull drive motor, which is preferably connected to a machine control. A web tension can be set and kept within limits by means of the dancer roller and / or the web tension is preferably kept within limits. If necessary, the roll unwinding device has an adhesive and cutting device, by means of which a roll change can be carried out on the fly, ie without the printing material web 02 standing still. The feed mechanism is preferably arranged downstream of the first web edge aligner. The at least the draw roller is preferably arranged as part of the feed mechanism which preferably the pulling press is arranged together to form the feed gap. The feed gap serves to regulate a web tension and / or to transport the printing material 02.

A printing unit 200 is to be understood as a device by means of which a web or sheet-shaped printing material 02 is or can be provided with at least one printing fluid on at least one of its sides. The at least one first printing unit 200 of the printing press 01 preferably has at least one printing point 201. A printing point 201 is to be understood as a preferably complete area in which contact between a respective same printing fluid and a printing material 02 is or can be produced. The term “printing point 201” is also to be used when the printing fluid is applied to the printing material 02 without pressure between the printing material 02 on the one hand and a component that transmits the printing fluid, for example by the impact of freely moving printing fluid on the printing material 02, for example flying drops of the pressure fluid. A printing point 201 preferably comprises all areas which are provided for a certain printing fluid, in particular associated with this printing point 201, to strike the printing material 02. In the case of a printing unit 200 operating according to the inkjet printing method, a printing point 201, for example, comprises all areas which are provided for a black ink to strike a first side of the printing substrate 02.

The at least one first pressure unit 200 preferably has a plurality of pressure points 201, each of which is assigned a respective pressure fluid, for example at least four pressure points 201, preferably at least five pressure points 201, more preferably at least six pressure points 201 and even more preferably at least seven pressure points 201.

A working width of the printing press 01 and / or of the at least one printing unit 200 is a dimension that is preferably orthogonal to the intended one Transport path of the printing material 02 extends through the at least one first printing unit 200, more preferably in the transverse direction A. The transverse direction A is preferably a horizontally running direction A. The transverse direction A is orthogonal to the intended transport direction of the printing material 02 and / or orthogonal to the intended one Transport path of the printing material 02 through the at least one printing unit 200 oriented. The working width of the printing press 01 preferably corresponds to a maximum width that a printing substrate 02 may have in order to be able to be processed with the printing press 01, that is to say a maximum printing substrate width that can be processed by the printing press 01. The working width of the printing press 01 preferably corresponds to the working width of the at least one first printing unit 200.

Each printing point 201 preferably has at least one job point 211. Each job site 211 is preferably assigned to at least one image-forming device 221, in particular at least one print head 221 and further preferably at least one print head row 222. Each job site 211 preferably extends in the transverse direction A, more preferably over the entire working width of the printing press 01. In the case of an inkjet printing press 01, the at least one imaging device 221 is preferably designed as at least one printhead 221, in particular inkjet printhead 221. The at least one printing unit 200 preferably has at least two printing heads 221. For example, the at least one printing unit 200 is characterized in that the at least two print heads 221 are designed as print heads 221 designed for a non-impact printing process, and further preferably in that the at least two print heads 221 are designed as ink-jet print heads 221. Imaging devices 221, such as printheads 221, usually have a limited dimension, in particular in the transverse direction A. This results in a restricted area of the printing substrate 02, to which printing fluid 221 can be applied by a respective printhead. Therefore, multiple imaging devices 221 are commonly used or print heads 221 arranged one behind the other in the transverse direction A. Such print heads 221 arranged one behind the other in the transverse direction A are referred to as print head rows 222. Interrupted print head rows 222 and continuous print head rows 222 are described below. In the special case of a printhead 221 which extends over the entire working width, this should also count as a printhead row 222, in particular as a continuous printhead row 222.

Such individual print heads 221 are usually not provided with nozzles up to one edge of their housing. Therefore, at least two, and more preferably exactly two, print head rows 222 extending in the transverse direction A are preferably arranged offset with respect to one another along the transport path provided for the printing substrate 02. Such print head rows 221 are, for example, interrupted print head rows 222. In each case two such, in particular interrupted, print head rows 222 together form a double row 223 of print heads 221. By means of a correspondingly offset arrangement of the print heads 221 of the two interrupted print head rows 222, the entire working width of the printing press 01 and / or at least one is preferably a first printing unit 200 can be reached from nozzles of the printing heads. A plurality of print head rows 222, more preferably at least four double rows 223 and even more preferably at least eight double rows 223 of print heads 221 are preferably arranged in a direction orthogonal to the transverse direction A, in particular in the transport direction along the intended transport path of the printing substrate 02.

Each nozzle is preferably assigned a clearly defined target area in the direction A of the width of the printing material web 02 and preferably in the transverse direction A. Each target area of a nozzle is preferably clearly defined, at least in the printing mode. In particular, a target region of a nozzle is that region of space, which in particular is essentially a straight line, and which extends in an ejection direction of this nozzle from this nozzle. An impact area is preferably an area that is suitable for a Contact of printing fluid with the printing material 02 is provided, in particular for drops of printing fluid with the printing material 02. Each nozzle of each print head 221 is preferably assigned an impact area, in particular in a direct ink jet printing process. A striking area of a print head 221 is preferably a sum of all striking areas of nozzles of this printhead 221. An application point 211 is preferably a sum of striking areas of functionally combined printheads 221, which together span the entire working width of the printing press 01. In the case of pairs of interrupted print head rows 222 designed as double rows 223, an application point 211 is preferably a sum of areas of impact of the print heads 221, which together form the double row.

A printing unit 200, for example, comprises only one printing point 201, for example for the color black. Preferably, however, the at least one first printing unit 200 has, as described, a plurality of printing points 201. The pressure points 201 can directly adjoin one another spatially or can be spaced apart, for example separated by colors. The term pressure point 201 should also include a section which - e.g. B. without interruption by a different color - has several successive job sites 211 of the same color. In the case of only one printing point 201, this simultaneously represents the first and the last printing point 201 of the relevant printing unit 200.

For example, in the case of an indirect inkjet printing method, a printing point is a contact area between a transfer body and the printing substrate 02. The at least one printing unit 200 preferably has at least one print head 221, which is designed as at least one inkjet print head 221. Each printhead 221 preferably has a plurality of nozzles from which drops of printing fluid, in particular ink drops, are ejected and / or ejectable are. The at least one pressure unit 200 preferably has at least one nozzle bar 231. A nozzle bar 231 is a component which preferably extends over at least 80% and more preferably at least 100% of the working width of the printing press 01 and / or preferably serves as a carrier for the at least one printhead 221. In this case, for example, a single or preferably a plurality of nozzle bars 231 are arranged per printing unit 200. The at least one printing unit 200 further preferably has at least three nozzle bars 231, even more preferably at least five nozzle bars 231 and even more preferably at least fourteen (14) nozzle bars 231. The at least one first nozzle bar 231 preferably extends orthogonally to the intended transport path of the printing substrate 02 over the entire working width of the printing press 01, in particular in the transverse direction A.

The at least one nozzle bar 231 preferably has at least one print head 221 and preferably a plurality of print heads 221. In the case in which the at least one nozzle bar 231 each has only one print head 221, this print head 221 preferably extends over an entire working width of the printing press 01. In the case in which the at least one nozzle bar 231 each has a plurality of print heads 221 these printheads 221 are preferably designed as at least one printhead row 221 or more preferably as at least one double row 223 of printheads 221 and the at least one printhead row 222 or double row 223 of printheads 221 preferably extends over an entire working width of the printing press 01. In the case of a double row 223 of Printheads 221, the at least one row of nozzles of the respective nozzle bar 231 is preferably divided into at least two interrupted printhead rows 222.

The at least one nozzle bar 213 preferably has a plurality of rows of nozzles in a conveying direction of a printing material guide 249. This conveying direction of the printing material guide 249 is preferably identical to the transport direction of the transport path provided for the transport of printing material 02. Preferably everyone has Printhead 221 on a plurality of nozzles, which are further preferably arranged in a matrix of several rows in the transverse direction A and / or several columns, preferably in the conveying direction of the substrate guide 249, such columns being arranged, for example, obliquely to the conveying direction of the substrate guide 249 to increase the resolution of a printed image.

The at least one print head 221 preferably works according to the drop-on-demand method in order to generate ink drops, in which ink drops are specifically generated if required. At least one heating element is preferably used for each nozzle, which generates an evaporation of pressure fluid within a reservoir. Alternatively, at least one piezo element is used for each nozzle, which can reduce a volume filled with printing ink by a certain amount at high speed when a voltage is applied.

A conveyor line, in particular a conveyor line for printing substrate 02, preferably comprises those devices 241; 251; 252; 253; 254; 256; 257; 303; 306; 343; 344, which define a transport path for the printing material 02, for example rollers, cylinders, guide elements and the like. A conveying path of the at least one first printing unit 200, which extends from a first printing point 201 of the at least one first printing unit 200 along the transport path provided for the printing substrate 02 to a last printing point 201 of the at least one first printing unit 200 along the transport path provided for the printing substrate 02 extends, is referred to as the printing path 224 of the at least one first printing unit 200. The intended transport route is the space area that the printing substrate 02 would take up if it were present. The conveying path of the at least one first printing unit 200 preferably comprises those devices 241; 251; 252; 254; 256, which determine the transport path through the at least one first printing unit 200, in particular both the intended transport path regardless of the presence of the printing material 02 and the one actual transport route when printing material 02 is present. The part of the intended transport route of printing material 02 defined by printing path 224 is referred to as printing section 226 of the intended transport route.

The at least one printing unit 200 preferably has a plurality of support points 261 along the printing section 226 of the transport path provided for printing substrate 02. Support points 261 are preferably distinguished by the fact that at support points 261 the intended transport path is influenced, for example changed, with respect to its transport direction. These support points 261 are preferably defined by respective guide elements 241. The guide elements 241 are preferably part of the printing material guide 249. Guide elements 241 are preferably devices which limit and redirect the transport route provided for the printing material 02 and, in particular in the case of the presence of the printing material 02, are preferably at least partially in contact with the printing material 02. Co-rotating and / or positively driven rollers and / or rollers and / or belt conveyors come into question as guide elements 241, but the guide elements 241 are preferably designed as one-piece or multi-piece fixed guide elements 241. A deflection angle 227 of a guide element 241 is preferably an angle between a first local transport direction T1 and a second local transport direction T2, the first local transport direction T1 being a direction T1 of the transport path provided for the printing substrate 02 in an area in which the intended transport path is located the guide element 241 runs or is intended to run up, and the second local transport direction T2 is a direction T2 of the transport route provided for the printing substrate 02 in a region in which the intended transport route leaves or is intended to leave the guide element 241. (As an example, this is also shown schematically in Fig. 2 The guide elements 241 are in particular components of the conveyor line. At least the guide elements 241 arranged in the area of the printing section 226 of the transport path provided for printing substrate 02 are in particular components of the printing path 224.

As an alternative or in addition, the printing unit 200 is preferably distinguished by the fact that the guide elements 241, which define this transport path in the region of the printing section with guide elements 241 which are fixed with respect to movements in the axial direction A. The at least two guide elements 241, which define the intended transport route, preferably each have an uninterrupted guide surface in the axial direction A of at least 25%, preferably at least 50%, further preferably at least 80% and even more preferably at least 100% of the working width of the printing unit 200. The at least one guide element 241 preferably extends in the transverse direction A over the entire working width of the printing press 01. A cross section of the at least one guide element 241 is preferably an intersection of the at least one guide element with a plane whose surface normal is oriented parallel to the transverse direction A. The entire cross section of the at least one guide element 241 is preferably the same as viewed over the working width of the printing press 01, in particular independently of the position of the cross section within the working area of the at least one first printing unit 200 and / or independently of the position of the cross section with respect to the transverse direction A.

Relatively flat guide elements 241 are conceivable, for example in the form of slightly bent metal sheets. However, the guide elements preferably have an essentially cylindrical jacket-shaped surface 228. The cross section of the at least one guide element 241 preferably has at least one curved outer boundary, in particular with a finite radius of curvature that differs from zero. This radius of curvature and thus the radius of the guide elements 241 is preferably greater than 5 mm, more preferably greater than 10 mm and even more preferably greater than 13 mm. This radius of curvature and thus the radius of the guide elements 241 is preferably less than 50 mm, more preferably less than 30 mm and even more preferably less than 18 mm. This curved outer boundary preferably lies at least in a region of the cross section which faces the transport region provided for the printing substrate 02. The curvature is particularly convex. The whole is more preferred outer boundary of this cross section curved. The boundary of this cross section is even more preferably essentially circular.

The at least one guide element 241 preferably has, at least in the region of the working width of the printing press 01 and / or of the at least one first printing unit 200, an outer surface 228 in the form of a cylinder jacket, more preferably over an entire extent of the working width of the printing press 01 and even more preferably over the entire extent of the at least one guide element in the transverse direction A. Preferably, several of the guide elements 241 are constructed identically, more preferably all of the guide elements 241 within the printing path 224 of the at least one first printing unit 200. Preferably, several such guide elements 241 are arranged one after the other with respect to the transport path provided for the printing substrate 02 , in particular at least three, more preferably at least five and even more preferably at least fourteen, for example twenty-eight. The printing path 224 preferably has a plurality of such guide elements 241 arranged one after the other. Due to the relative arrangement of the guide elements 241 of the printing path 224 to one another, a respective deflection angle 227 is defined for each guide element 241. The deflection angles of the guide elements 241 of the printing section 224 are preferably essentially the same and differ at most in the region of a first and / or a last guide element 241 of the printing section 224 from those of the other guide elements 241 of the printing section 224.

When reference is made to guide elements 241 in the foregoing and / or below, at least and further preferably only those guide elements 241 of the printing path 224 are meant. The deflection angle 227 of the at least one guide element 241 and more preferably several and even more preferably all guide elements 241 is at least 0.5 ° (zero point five degrees), more preferably at least 1 ° (one degree) and even more preferably at least 1.5 ° (one point five degrees). The deflection angle 227 of the at least one guide element 241 is preferably and more preferably several and even more preferably all Guide elements 241 at most 10 ° (ten degrees), more preferably at most 5 ° (five degrees) and even more preferably at most 2.5 ° (two point five degrees). The guide elements 241 of the printing path 224 are preferably arranged in the form of an arc, in particular an arc, along the printing path 224.

At least one support element 273; 274 arranged. The at least one support element 273; 274 preferably serves as a support device for the at least one guide element 241, more preferably for a plurality of guide elements 241 of the printing section 224 and even more preferably for all guide elements 241 of the printing section 224. The at least one support element 273 is designed, for example, as at least one lateral support element 273. The at least one support element 273; 274 is preferably designed as at least one support frame 276 or as part of at least one support frame 276, which has, for example, at least two lateral support elements 273, to which, more preferably, a plurality of guide elements 241 are fastened directly and / or via holding devices. In particular, the at least two lateral support elements 273 are preferably designed as part of at least one support frame 276 and the at least one support frame 276 has at least one crossmember 277 that differs from the guide elements 241 and extends at least in the transverse direction A and for a constant relative position of the lateral ones Carrying elements 273 provides. For example, the at least one support frame 276 has at least two crossbeams 277 which are different from the guide elements 241 and which extend at least in the transverse direction A and ensure a constant relative position of the lateral support elements 273. A constant relative position preferably means that any relative movement is excluded.

In principle, this function can be taken over by the guide elements 241 itself, it then being necessary to ensure that when all the guide elements 241 are detached from the support elements 273; 274 the lateral support elements 273 are no longer fixed to one another. For reasons of stability, the arrangement of at least one traverse 277 is preferred.

The at least one lateral support element 273 preferably has at least one contact area for each guide element 241, on which the respective guide element 241 rests on the lateral support element 273 or is at least in contact with the lateral support element 273. At least one inner support element 274 is preferably arranged. The at least one inner guide element 241 is, for example, part of the at least one support frame 276. The at least one inner support element 274 is preferably used at least to protect one or more or preferably all of the guide elements 241 from unwanted or at least undesired high deflection.

A print head row 222 is preferably assigned to each guide element 241. Alternatively, several print head rows 222 could also be assigned to each guide element 241, for example if the guide elements 241 were not designed as rods, but as flat guide elements. A guide element 241 is preferably assigned to each print head row 222. A shortest distance between a respective nozzle of a respective print head 221 arranged in its printing position on the one hand and the transport path provided for the printing material 02 or the closest guide element 241 arranged in its working position on the other hand is preferably at least 0.1 mm, more preferably at least 0.5 mm and even more preferably at least 1.0 mm and preferably at most 5 mm, more preferably at most 3.0 mm and even more preferably at most 2.0 mm. A shortest distance between a respective nozzle of a respective print head 221 arranged in its printing position on the one hand and the printing substrate 02 on the other hand is preferably at least 0.1 mm, more preferably at least 0.5 mm and even more preferably at least 1.0 mm and preferably at most 5 mm , more preferably at most 3.0 mm and even more preferably at most 2.0 mm. These distances are related to one another via the thickness of the printing substrate 02.

At least one shielding device 292 is preferably arranged. The at least one shielding device 292 is preferably used to, for example, parts of the print heads shield their supply devices for electronics and / or for pressure fluid and / or their holders and / or parts of the nozzle bar 231 on the one hand against the transport path provided for the printing substrate 02 and in particular its printing section 226 and / or against an area having the nozzles of the print heads 221.

At least rotatable first web guiding means 251 are preferably arranged in front of the first guiding element 241 of the printing path 224 with respect to the transport path provided for the printing substrate 02. This at least one first rotatable web guiding means 251 is preferably designed as a first motor-driven web guiding means 251 and / or a first web guiding roller 251, in particular a first motor-driven web guiding roller 251. For example, the at least one first web guiding roller 251 has its own drive motor and / or is at least one first web guide roller 251 part of at least one system for regulating a web tension of a web-shaped printing material 02. At least one rotatable second web guiding means 254 is preferably arranged after the last guiding element 241 of the printing path 224 with respect to the transport path provided for the printing material 02. This at least one second rotatable web guide means 254 is preferably designed as a second motor-driven web guide means 254 and / or a second web guide roller 254, in particular a second motor-driven web guide roller 254. For example, the at least one second web guide roller 254 has its own drive motor and / or is at least one second web guide roller 254 part of the at least one system for regulating the web tension of the web-like printing material 02. The web guiding means 251; 253; 254; 257 and / or web guide rollers 251; 252; 253; 254; 256; 257 are preferably part of the substrate guide 249.

The printing section 226 of the transport path provided for the printing substrate 02 preferably extends monotonically. A first guide element 241 of the printing path 224 is preferably the lowest arranged of all the guiding elements 241 of the printing path 224. A last guide element 241 of the printing path 224 is preferably the lowest highest arranged guide element 241 of the printing path 224.

The at least one printing unit 200 preferably has at least one and more preferably exactly one swivel device 279. The at least one swivel device 279 is preferably assigned to at least one, more preferably several and even more preferably all guide elements 241 of the printing path 224. In particular, by means of the at least one swivel device 279, a plurality of guide elements 241 and more preferably all guide elements 241 of the printing path 224 about at least one common swivel axis 281; 282 arranged pivotably, in particular along a respective individual and / or differently long pivoting path. This is at least one common pivot axis 281; 282 preferably at least one pivot axis 281; 282 of the swivel device 279 of the at least one printing unit 200. For example, at least one support element 273; 274, in particular at least one lateral support element 273 and / or at least one inner support element 274 together with the guide elements 241 and / or at least one support frame 276 about the at least one common pivot axis 281; 282 arranged pivotably, in particular along a respective pivot path. The at least one support frame 276 about the at least one common pivot axis 281; 282 pivotally arranged.

Each about the at least one common pivot axis 281; 282 pivotable guide element 241 is preferably assigned a working position and a maintenance position. The working position of each guide element 241 is preferably distinguished by the fact that the guide element 241 is in a printing operation in its working position and / or that the guide element 241 arranged in its working position is at a minimum distance of a print head 221 next to this guide element and arranged in its printing position at most 5 mm, more preferably at most 3.0 mm and even more preferably at most 2.0 mm and / or that the guide element 241 arranged in its working position is different from that for the printing substrate 02 in printing operation intended transport route is affected. The maintenance position of each guide element 241 is preferably distinguished by the fact that the guide element 241 is in a maintenance state of the at least one first printing assembly 200 in its maintenance position and / or that the guide element 241 arranged in its maintenance position is arranged in its printing position by a guide element closest to this guide element Printhead 221 has a minimum distance of at least 5 cm, more preferably at least 10 cm and even more preferably at least 20 cm. and / or that the guide element 241 arranged in its maintenance position is spaced apart from the transport route provided for the printing substrate 02 in printing operation.

In a first embodiment of the swivel device 279, the swivel device 279 has exactly one common swivel axis 281. In this first embodiment of the swivel device 279, the at least one support element 273; 274 and in particular the at least one support frame 276 can be pivoted about a single common pivot axis 281, in particular relative to a frame 283 of the at least one first printing assembly 200. In a second embodiment of the pivoting device 279, the pivoting device 279 has at least two and preferably exactly two common pivot axes 281; 282 and at least one intermediate member 284. The at least one intermediate member 284 is preferably pivotable about a first common pivot axis 281 relative to the frame 283 of the at least one first printing assembly 200.

The at least one swivel device 279 preferably has at least one swivel drive 286, which is in particular common. The at least one swivel drive 286 has, for example, at least one linear drive 286. The at least one swivel drive 286, in particular linear drive 286, preferably engages the frame 283 with at least one first connecting element, for example directly or with the interposition of at least one further component. The at least one swivel drive 286, in particular linear drive 286, preferably engages at least a second connecting element on at least one support element 273; 274 and / or at least one traverse 277 and / or the support frame 276.

A main conveying direction B is preferably defined by a straight-line connection between a first guide element 241 of the printing path 224 related to the transport path provided for printing material 02 and a last guide element 241 of the printing path 224 related to the transport path intended for printing material 02. The main conveying direction B is preferably defined by a straight connection between a first guide element 241 related to the printing section 226 of the transport path intended for printing substrate 02 and a last guide element 241 related to the printing section 226 of the transport path provided for printing substrate 02. The main conveying direction B points from the first guide element 241 of the printing path 224 related to the transport path intended for printing substrate 02 to the last guide element 241 of the printing path 224 related to the transport path intended for printing substrate 02. The main conveying direction B is preferably oriented orthogonally to the transverse direction A.

Preferably, the orientation of the main conveying direction B with guide elements 241 arranged in its working position and / or with a support frame 276 arranged in its working position has an angle of at least 10 °, more preferably at least 20 ° and even more preferably at least 30 ° to the orientation of the main conveying direction B. in its maintenance position arranged guide elements 241 and / or with a support frame 276 arranged in its maintenance position.

The main conveying direction B preferably has at least one vertically upward-pointing component and at least one horizontal component when the guide elements 241 are arranged in their working position and / or the support frame 276 is arranged in their working position. The main conveying direction B is preferred in the case of guide elements 241 arranged in its working position and / or arranged in its working position Support frame 276 aligned at an angle of at least 10 °, more preferably at least 20 ° and even more preferably at least 30 ° to a horizontal plane. The main conveying direction B is preferably oriented at an angle of at most 70 °, more preferably at most 55 ° and even more preferably at most 40 ° to a horizontal plane with guide elements 241 arranged in its working position and / or with support frame 276 arranged in its working position. In an alternative embodiment, the main conveying direction B would run essentially horizontally, ie at an angle of at most 5 ° to a horizontal plane.

The main conveying direction B preferably has at least one vertically upward-pointing component, and more preferably only one vertically upward-pointing component, with guide elements 241 arranged in its maintenance position and / or with support frame 276 arranged in its maintenance position. The main conveying direction B is preferably arranged at an angle of at most 30 °, more preferably at most 20 ° and even more preferably at most 10 ° to a vertical direction with guide elements 241 arranged in its maintenance position and / or with support frame 276 arranged in its maintenance position.

The joint pivotability of the guide elements 241 of the print path 224 and / or the pivotability of the at least one support frame 276 preferably results in a possibility of increasing a distance between the nozzles of the print heads and / or the at least one shielding device 292 on the one hand and the guide elements 241 of the print path 224 on the other hand. Due to the joint pivotability of the guide elements 241 of the printing path 224 and / or the pivotability of the at least one support frame 276, there is thus a maintenance space 291 between the nozzles of the print heads 221 and / or the at least one shielding device 292 on the one hand and the guide elements 241 on the other. This maintenance room 291 is accessible to operating personnel, for example. This maintenance space 291 enables maintenance and / or cleaning of the guide elements 241 of the printing path, for example 224 and / or the at least one shielding device 292, in particular irrespective of the working width of the printing press 01. For example, at least one preferably movable support 293, in particular standing surface 293, is arranged in the maintenance space 291.

In a regular printing operation, all print heads 221 are arranged in a stationary manner. This ensures that all nozzles are permanently aligned and / or registered. Different situations are conceivable in which a movement of the print heads 221 is necessary. A first such situation is a flying roll change or printing material change or generally a roll change with gluing process or a printing material change with gluing process. At least the print heads 221 and preferably the at least one nozzle bar 231 as a whole can therefore be moved in at least one direction relative to the guide plane of the first printing material guide 249, in particular, can be turned off from this, further preferably orthogonal to a surface of the transport path provided for printing substrate 02 closest to the print head 221. At least one cleaning device, in particular at least one nozzle cleaning device, is preferably arranged, which has at least one washing nozzle and / or at least one brush and / or at least one puller and / or at least one cleaning fleece. The print heads 221 are preferably arranged so far from the guide elements 241 of the printing path 224, which are arranged in particular in their working position, that the at least one cleaning device, in particular nozzle cleaning device, fits into a resulting cleaning intermediate space 289. This at least one cleaning device is preferably arranged to be movable in the transverse direction A and more preferably has a dimension in the transverse direction A that is smaller than the working width of the printing press. In the case in which the print heads 221 assigned to it are arranged in their printing position, the at least one cleaning device is preferably arranged outside the working width of the printing press with respect to the transverse direction A. Each print head row 222 or each double row 223 of print heads 221 is preferably assigned its own cleaning device.

At least one first dryer 301 is preferably arranged along the transport path provided for printing substrate 02 after the at least one first printing unit 200, which has a region of the transport path provided for printing substrate 02 designed as a drying section, which is defined by an area of action of the at least one dryer 301. After passing through the at least one first printing assembly 200, the transport path of the printing substrate 02 and in particular the printing substrate web 02 preferably passes through the at least one first dryer 301 in order to dry the applied printing fluid. The at least one first dryer 301 is preferably part of the at least one dryer unit 300.

The at least one dryer unit 300 has at least one first dryer 301, which is preferably designed as at least one radiation dryer 301 and / or as at least one flow dryer 301. It is also possible to arrange several dryers 301 arranged one behind the other, for example along the intended transport path. Such a plurality of dryers 301 are arranged one above the other, for example in the case of a substantially vertical transport path, in the at least one dryer unit 300. The at least one first dryer 301 has at least one first preferably controllable and / or regulatable energy delivery device 302; 317 on. The at least one first energy output device 302; 317 is designed, for example, as at least one radiation source 302 and / or at least one air supply line 317. The at least one radiation source 302 is designed, for example, as an infrared radiation source 302 and / or as a radiation source 302 for ultraviolet light. The at least one radiation source 302 is preferably at least one controllable and / or regulatable radiation source 302. The at least one first energy output device 302; 317 is preferred for the targeted transmission of energy, in particular from the at least one first energy output device 302; 317 to one in an area of influence of the first energy delivery device 302; 317 arranged and / or arrangeable, preferably with Printing fluid provided printing material 02 is formed. The at least one first energy output device 302; 317 is arranged to be movable, in particular relative to the transport path provided for the transport of web-shaped printing material 02. The area of action of the at least one first energy output device 302 preferably cuts; 317 the transport route provided for the transport of web-shaped printing material 02.

The at least one first energy output device 302; 317 is arranged to be movable along an adjustment path between at least one action position and at least one shut-off position and more preferably two shut-off positions, in particular with respect to an adjustment direction S. The travel path extends over at least 75% of its total distance, preferably over at least 90% of its total distance and more preferably over its entire total distance, continuously in a linear manner and / or counter to the setting direction S. The total distance is the maximum distance that the travel distance between two points can be. The at least one first energy output device 302; 317 is thus arranged to be movable along at least 75%, preferably at least 90% and more preferably completely linear adjustment path in and / or counter to the adjustment direction S between at least one action position and at least one stop position or preferably two different stop positions. The adjustment direction S deviates from at least one horizontal direction by at most 40 °, preferably at most 30 °, more preferably at most 15 ° and even more preferably at most 5 °. The setting direction S also deviates from a normal direction N by at most 40 °, preferably at most 30 °, more preferably at most 15 ° and even more preferably at most 5 °. This normal direction N is preferably a normal direction N of a mean surface normal of an entire, in particular an entire Area of influence of the at least one first energy output device 302; 317 lying section of the transport route provided for web-shaped printing material 02. The normal direction N of the mean surface normal is determined in particular as an average over all directions of Surface normals of tangent planes to all in the area of action of the at least one first energy delivery device 302; 317 surface elements of the transport route provided for printing material 02. If, as is preferred, the printing material 02 extends substantially vertically through the area of action of the at least one energy output device 302; 317, the normal direction N and / or the adjustment direction S is thus preferably oriented essentially horizontally.

The printing press 01 is preferably characterized in that at least temporarily and preferably permanently at least one and preferably exactly one along at least within the at least one dryer unit 300 and more preferably also within the at least one printing unit 200 and even more preferably in a further region a retractable, preferably endless, retraction means for retracting a printing material web 02 is arranged and / or can be arranged. An arrangement within the dryer unit 300 is to be understood in particular to mean that a projection of the at least one drawing-in means in or against the axial direction A or transverse direction A extends the area of action of the at least one energy delivery device 302; 317 cuts.

At least two parking positions of the at least one first energy output device 302, which are different in particular with respect to the setting direction A, are preferred; 317 are provided, in which the at least one first energy output device 302; 317 can be specifically arranged depending on the operating mode. The at least two parking positions provided are preferably provided in addition to the at least one working position. For example, one of the parking positions is a retracted position and / or one of the parking positions is an access position. The pull-in position is preferably to be taken when a printing material 02 is to be pulled in by the at least one dryer unit 300. The access position is preferably to be assumed when an operator has access to a side of the at least one energy output device 302; 317 should receive.

For example, a shortest distance between the at least one first energy output device 302; 317 and the transport route provided for the printing substrate 02 with the first energy output device 302 arranged in the access position; 317 larger than when the first energy delivery device 302 is arranged in the retracted position; 317. In particular, a shortest distance between the at least one first energy output device 302; 317 and the transport path provided for the printing material 02 with the first energy output device 302 arranged in the retracted position; 317 larger than when the first energy delivery device 302 is arranged in the active position; 317, preferably by at least 5 mm, more preferably by at least 50 mm and even more preferably by at least 90 mm and independently of this, for example by at most 400 mm. A shortest distance between the at least one first energy output device 302 is preferred; 317 and the transport route provided for the printing substrate 02 with the first energy output device 302 arranged in the access position; 317 larger than when the first energy delivery device 302 is arranged in the active position; 317, preferably by at least 450 mm, more preferably by at least 600 mm and even more preferably by at least 700 mm.

It is preferred along the transport path provided for the printing substrate 02 after the area of action of the at least one first energy output device 302; 317 at least one measuring roller 343 and / or at least one first deflection roller 347 is arranged, which is preferably wrapped around by the transport path provided for the printing material 02 and / or the printing material 02. It is preferred along the transport path provided for the printing substrate 02 in front of the area of action of the at least one first energy output device 302; 317 at least one first pull roller 344 is arranged, which is assigned at least one drive motor of its own, and which is preferably from the transport route provided for the printing material 02 and / or the printing material 02 is wrapped and / or is along the transport path provided for the printing substrate 02 after the area of action of the at least one first energy output device 302; 317 and / or after the at least one measuring roller 343 and / or after the at least one first deflection roller 347, at least one second pull roller 303 is arranged, which is preferably wrapped around by the transport path provided for the printing material 02 and / or the printing material 02. The at least one second pull roller 303 and / or the at least one measuring roller 343 and / or the at least one first deflecting roller 347 is preferably designed as at least one cooling roller 303.

Preferably, several, for example at least three, more preferably at least five and even more preferably at least nine pressure rollers 306 are each individually pressed against the at least one second pull roller 303. For example, each of these pressure rollers 306 is arranged on its own lever arm, which is pivotably arranged by means of its own force element. All such lever arms are preferably arranged so as to be pivotable about a common axis. At least one second deflection roller 348 is preferably arranged along the transport path provided for the printing substrate 02 after the at least one pull roller 303, which is preferably wrapped around by the transport path provided for the printing substrate 02 and / or the printing substrate 02. For example, the at least one second deflection roller 348 is identical to the at least one web guide roller 257.

At least one actuator is preferably arranged, by means of which a movement of the at least one energy output device 302; 317 can be carried out along the travel path. The at least one actuator is designed, for example, as at least one hydraulic and / or as at least one pneumatic drive. The at least one actuator is preferably designed as at least one electric drive and / or further preferably has at least one threaded spindle and at least one threaded nut interacting with it.

The printing machine 01, which has at least one first printing unit 200, is preferably characterized in that the at least one dryer unit 300 with the at least one first dryer 301 is arranged along the transport path provided for printing substrate 02 after the at least one first printing unit 200, which in particular is a Drying section formed area of the transport path provided for printing substrate 02, which is defined by the area of action of the at least one first dryer 301. Preferably, in at least half and more preferably at least 75% of the entire drying section of the transport path provided for printing substrate 02, a transport direction provided for printing substrate 02 has at least one vertical, preferably downward-pointing component that is larger than any horizontal component that may be present this direction of transport.

The axial direction A or transverse direction A is preferably defined by a rotation axis of the at least one first pull roller 344 and / or a rotation axis of the at least one second pull roller 303, in particular as a direction parallel to this axis of rotation. The setting direction S of the at least one energy output device 302; 317 is preferably linear. The setting direction S of the at least one energy output device 302; 317 deviates from the axial direction A or transverse direction A by at least 50 °, preferably at least 60 °, more preferably at least 75 ° and even more preferably at least 85 °. The setting direction S preferably gives way to the at least one energy output device 302; 317 in particular from at least one horizontal direction by at most 40 °, preferably at most 30 °, more preferably at most 15 ° and even more preferably at most 5 °.

By means of the at least one energy output device 302; Radiation emitted is preferably solvent and / or moisture removed from the printing material web 02 and / or from the printing fluid arranged thereon and from the ambient air recorded in an interior of the at least one first dryer 301. The transport path of the printing material web 02 runs through this interior of the at least one first dryer 301. At least one ventilation device in the region of the at least one energy delivery device 302 is preferred; 317 arranged.

The ventilation device preferably has at least one air supply line 317 and at least one air discharge line 318. In addition to its design as a radiation dryer 301, the at least one first dryer 301 is thus also designed as a flow dryer 301. The at least one air supply line 317 is preferably arranged between at least two air discharge lines 318 along the transport path provided for printing substrate 02. For example, the at least one air supply line 317 has tubular sections and / or the at least one air supply line 317 ends in a funnel-shaped end region which has a substantially larger cross-sectional area than other sections of the at least one air supply line 317. For example, the at least one air discharge line 318 has tubular sections and / or the at least one air discharge line 318 begins in a funnel-shaped initial region which has a substantially larger cross-sectional area than other sections of the at least one air discharge line 318.

The at least one air supply line 317 is preferably at least one energy delivery device 317 and at least one radiation source 302 is likewise at least one energy delivery device 302. In this case, the at least one dryer 301 then has at least two energy delivery devices 302; 317 on. The at least one air supply line 317 and / or the at least one air discharge line 318 preferably each have at least one flexible region to which they are connected to a stationary air transport device. Is preferred on one of the at least one energy output device 302; At least one radiation shield 346 and / or at least one reflector 346 are arranged on the side of the transport path provided for the printing substrate 02 facing away from the 317. At least one heat exchanger is preferably arranged, by means of the air which flows through the at least one air discharge line 318, can release energy to the air which flows through the at least one air supply line 317.

At least one shut-off device 349 is preferably arranged, by means of which a security area can be separated and / or separated from an environment. The security area is preferably such an area that comprises at least each volume that can be taken up by the at least one energy delivery device 302 and possibly also by at least one dryer frame 351 carrying the at least one energy delivery device 302 during the movements along the travel path. The security area also preferably comprises a larger room area. The security area can preferably be entered from an environment through at least one closable opening in the shut-off device 349. This at least one opening can preferably be closed by means of a locking device 352, for example at least one door 352. Movement of the at least one energy delivery device 302, in particular from its active position and / or its access position and / or its retracted position, is preferably only possible when the at least one closure device 352 is closed and / or when a signal transmitter arranged outside the security area is operated. Preferably, the at least one closure device 352 can only be opened when the at least one energy delivery device is arranged in its access position.

A preferred method for operating a printing press 01 can be carried out in particular by means of the printing press 01. This is a method for operating the printing press 01, wherein the printing press 01 has the at least one first printing unit 200 and the at least one dryer unit 300 and the at least one dryer unit 300 the at least one first dryer 301 with at least the first energy output device 302; 317. In a first shutdown process, the at least one energy delivery device 302; 317 in particular by means of the at least one actuator from the active position in the Adjustment direction S along a linear adjustment path by at least 5 mm, preferably by at least 50 mm and further preferably by at least 90 mm and independently of this, for example by a maximum of 400 mm in the retracted position and stopped there. In a subsequent pull-in process, at least one web-shaped printing material 02 is preferred by means of at least one drawing-in means, in particular different from each printing material 02, along the transport path provided for the printing material 02 through the area of action of the at least one energy output device 302; 317 moved in. The at least one first energy output device 302; 317 in particular by means of the at least one actuator from the retracted position against the actuating direction S and moved back along the same linear adjustment path into the active position and stopped there.

It is preferred between the first shutdown process and a second shutdown process in at least one drying process in the area of action of the first energy delivery device 302; 317 energy from the at least one first energy output device 302; 317 on the previously drawn web-shaped printing material 02. It is further preferred that the web-shaped printing material 02 previously drawn in is at least partially provided with at least one printing fluid in the at least one printing unit 200.

The at least one first energy output device 302; 317 in particular by means of the at least one actuator from the acting position in the particular same direction S along the in particular the same linear adjustment path by at least 450 mm, more preferably by at least 600 mm and even more preferably by at least 700 mm into an access position different from the retracted position and stopped there. In a first maintenance operation taking place afterwards, at least one maintenance operation on the at least one first is preferred Energy delivery device 302; 317, for example an exchange of at least one current-carrying component and / or cleaning of a component. The at least one first energy output device 302; 317 in particular by means of the at least one actuator drive from the access position against the actuating direction S along the same linear adjustment path back to the active position and stopped there.

The method is preferably characterized in that the at least one drawing-in means is connected to the at least one printing substrate web 02 in one connection process by means of at least one connecting element. Preferably, the at least one connecting element passes a printing position of the at least one printhead 221 while it is switched off from the intended transport path and / or is arranged in at least one rest position and / or the at least one connecting element passes at least one target area of at least one nozzle of the at least one during the pulling-in process Printhead 221 and / or during the pulling-in process, no component of the at least one pulling-in means passes a target area of a nozzle of the at least one printhead 221. The at least one connecting element preferably passes a working area of the at least one energy delivery device 302; 317 of the at least one first dryer 301, while this is in a storage position designed as a retracting position. During the pulling-in process, preferably no component of the at least one pulling-in means passes the area of action of the at least one energy delivery device 302; 317. Only at least one drawing-in means is preferably used, which is arranged in relation to the axial direction A on only one side of the intended transport path for printing material 02 and / or whose drawing-in path runs only on one side of the intended transport path for printing material 02.

After the printing material web 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. A transport path for the printing material 02 comprising one or more guiding and / or conveying means is preferably formed downstream of the last printing point 201 in such a way that the first side of the printing material web 02 printed in the at least one first printing unit 200 after passing the last printing point 201 to to the area of influence of the at least one energy output device 302; 317 of the at least one first dryer 301 does not come into contact with any component of the web printing press 01, in particular with any guidance and / or conveying means. After passing the last printing point 201, the second side of the printing material web 02, which is not printed by the first printing unit 200, preferably stands up to the area of action of the at least one energy output device 302; 317 of the at least one first dryer 301 with at least one web guiding means 257, for example at least one web guiding roller 254; 256; 257 and / or the first pull roller 344 in contact.

A transport direction provided for the printing substrate 02 preferably has at least one vertical, preferably downward-pointing component in at least half and more preferably in at least 75% of the entire drying section, which is larger than any horizontal component of this transport direction that may be present. For this purpose, a motor-driven web guide roller 254 or pull roller 344 is preferably arranged, which is wrapped by the printing material 02 and / or the intended transport path with a wrap angle that is preferably at least 45 °, more preferably at least 60 ° and even more preferably at least 75 °. This at least one motor-driven web guide roller 254 or pull roller 344 is preferably arranged along the printing material 02 and / or along the transport path provided for the printing material 02 after the last guide elements of the printing path 224 and before the area of action of the at least one dryer 301.

The at least one first dryer 301 preferably has at least one radiation source 302, which is preferably designed as a radiation source 302 for microwaves and / or for radiation in the visible range and / or in the ultraviolet range of the electromagnetic spectrum and / or more preferably as an infrared radiation source 302. The at least one first dryer 301 is preferably designed as an infrared radiation dryer 301. A radiation source 302, preferably infrared radiation source 302, is a device by means of which electrical energy is specifically converted into radiation, preferably infrared radiation and / or can be converted and is directed and / or can be directed onto the printing material web 02. The at least one radiation source 302 forms the at least one energy output device 302. The at least one radiation source 302 preferably has a defined area of action. In particular, the area of action of a radiation source 302 is in each case the area which contains all the points which can be connected to the radiation source 302 in a straight line, in particular without interruption, or via reflectors provided in particular for this. The area of action of the at least one first dryer 301 is preferably composed of the areas of action of all radiation sources 302 of the at least one first dryer 301 and / or of the areas of action of all air supply lines 317 of the at least one first dryer 301. The area of action of the at least one first dryer 301 preferably points from the at least one radiation source 302 to a part of the transport path of the printing material web 02 closest to the at least one radiation source 302.

Air is preferably introduced into the interior of the at least one first dryer 301 through at least one ventilation opening of the at least one air supply line 317. In the interior of the first dryer 301, water and / or solvents of the printing inks to be removed from the printing material web 02 are then removed, for example, by the infrared radiation and taken up by the introduced air. This air is then discharged from the at least one first dryer 301 through at least one ventilation opening and / or at least one air discharge line 318.

At least one first cooling device is preferably arranged 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. The at least one first cooling device preferably has the at least one first cooling roller 303 and preferably a first cooling roller press that can be adjusted and / or adjusted to the at least one first cooling roller 303 and / or the at least one and in particular several that can be adjusted and / or to the at least one first cooling roller 303 or employed pressure rollers 306.

Preferably, at least parts of the at least one retraction path and preferably the full retraction path have a distance of at least 2 cm, more preferably at least 4 cm, in relation to each target area of each nozzle of each printhead 221 of this at least one printing unit, in relation to the axial direction A or transverse direction A preferably at least 6 cm and even more preferably at least 8 cm. Preferably, at least parts of the drawing-in means and more preferably the complete drawing-in means have a distance of at least 2 cm, more preferably at least 4 cm, more preferably at least 2 cm, in relation to each target area of each nozzle of each print head 221 of this at least one printing unit 200, in relation to the axial direction A or transverse direction A at least 6 cm and even more preferably at least 8 cm. In particular, the at least one draw-in path and / or the at least one draw-in means is preferably arranged outside the working width of the printing press 01 with respect to the axial direction A. The feed path in the area of the printing section 226 of the transport path provided for printing substrate 02 is preferably curved in exactly one direction.

The drawing-in means is preferably different from any printing material 02. For example, the at least one drawing-in means is designed as at least one endless drawing-in means, for example as at least one endless drawing-in belt. The at least one pull-in means is alternatively as at least one finite pull-in means trained, for example as a finite webbing and / or as a finite webbing chain. At least one retraction drive is preferably arranged, by means of which the at least one retraction means is arranged to be movable along the at least one retraction path. For example, in the case of an endless pull-in means, it is sufficient if exactly one such pull-in drive is arranged. Alternatively, the at least one pull-in means is finally formed. Then at least one draw-in store is preferably arranged, in which the at least one draw-in means can be arranged at least temporarily, in particular as long as it is not used to draw in a printing material web 02. In an alternative embodiment, the at least one pull-in means is designed as at least one finite pull-in chain. In the preferred case of the at least one endless drawing-in means, the at least one drawing-in means for drawing in a printing material web 02 along the intended transport path of the printing material web 02 is preferably arranged in particular permanently along its at least one drawing-in path within the printing press 01.

At least one pull-in guide element is preferably arranged, by means of which at least one pull-in path of the at least one pull-in means can be fixed and / or fixed. The at least one pull-in guide element is designed, for example, as at least one deflection roller. The at least one pull-in guide element is alternatively designed as at least one chain rail. The at least one pull-in guide element is preferably designed as at least one rotatable pull-in guide element, for example as at least one deflection roller. In particular, a chain rail can also have switches for realizing different insertion paths.

The at least one drawing-in means for drawing in a printing material web 02 along the intended transport path of the printing material web 02 is preferably arranged in particular permanently along its at least one drawing-in path within the printing press 01. The at least one pulling means preferably has at least two and more preferably at least five provided connection points at which at least one printing material web 02 can be connected directly and / or via at least one connecting element to the at least one drawing-in means. The printing press 01 is preferably distinguished in that the at least two connection points are at a distance of at most 10 cm, more preferably at most 5 cm, still more preferably at most 2 cm and even more preferably not at all, based on the axial direction A or transverse direction A. and / or that the at least two connection points are spaced apart from one another along the at least one pull-in path.

Before the printing material web 02 is drawn in by the at least one printing unit 200, at least one printing head 221 of the at least one printing unit 200 designed as an inkjet printing head 221 is preferably switched off from the intended transport path of the at least one printing material web 02. Thereafter, in a sub-process of a drawing-in process, at least one drawing-in means is preferably moved along a drawing-in path through the at least one printing unit 200 and the at least one printing material web 02 is thereby drawn along the transport path provided for the at least one printing material web 02. The pull-in path and the transport path are preferably spaced apart from one another in an axial direction A or transverse direction A.

At least one post-processing device is arranged along the transport path of the printing material web 02 after an extraction nip and / or after a rewetting device, which is preferably designed as a single- or multi-stage folding device and / or has a sheet cutter and / or a flat delivery or is designed as a winding device. In this and / or through this post-processing device, the printing material web 02 is preferably folded and / or cut and / or stapled and / or sorted and / or enveloped and / or shipped and / or wound up.

The working width of the printing press 01 and / or the at least one first printing unit 200 and / or a width of a printing substrate 02 to be processed is, for example, at least 1500 mm, preferably at least 2000 mm and further preferably at least 2500 mm. However, even larger working widths and / or web widths are possible through the arranged guide elements 241, in particular in connection with the arranged inner support elements 274 and / or through the adjustment direction S of the at least one energy delivery device 302.

Reference list

01

Printing machine, ink jet printing machine, roll printing machine, roll ink jet printing machine

02

Printing material, printing material web

200

Printing unit, inkjet printing unit, first

201

Pressure point

211

Place of order

221

Imaging equipment, printhead

222

Print head row

223

Double row of printheads

224

Printing distance

225

-

226

Printing section

227

Deflection angle

228

Surface, lateral surface, surface, outer (241)

229

Central axis (241)

230

-

231

Nozzle bar

241

Guide element

249

Substrate guide

250

-

251

Web guiding means, web guiding roller, first

252

Web guide roller

253

Web guiding means, web guiding roller

254

Web guiding means, web guiding roller, second

255

-

256

Web guide roller

257

Web guiding means, web guiding roller

258

-

259

-

260

-

261

Base

273

Supporting element, on the side

274

Support element, inside

275

-

276

Support frame

277

traverse

278

-

279

Swivel device

280

-

281

Swivel axis, first

282

Swivel axis, second

283

frame

284

Pontic

285

-

286

Swivel drive, linear drive

287

-

288

-

289

Cleaning space

290

-

291

Maintenance room

292

Shielding device, shielding surface, shielding plate

293

Stand help, stand area

300

Dryer unit

301

Drying aids, dryers, infrared radiation dryers, flow dryers, first

302

Energy delivery device, radiation source, infrared radiation source

303

Chill roll, pull roll, second,

304

-

305

-

306

Pressure roller

317

Energy delivery device, air supply line

318

Air discharge line

343

Measuring roller

344

Pull roller, first

345

-

346

Radiation shield, reflector

347

Deflection roller, first

348

Deflection roller, second

349

Blocking direction

350

-

351

Dryer rack

352

Locking device, door

A

Direction, cross direction

B

Main funding direction

T1

Direction of transport, first

T2

Direction of transport, second

S

Setting direction

N

Normal direction

Claims (15)

1. A printing press (01) having at least one printing assembly (200) and at least one dryer unit (300, wherein the at least one printing assembly (200) has at least one inkjet print head (221) and wherein the at least one dryer unit (300) has at least one first dryer (301) and wherein the at least one first dryer (301) has at least one first energy output device (302; 317) and wherein the at least one first energy output device (302; 317) is arranged such that it can move along an actuating distance between at least one active position and at least one stop position, characterized in that the actuating distance extends in a continuously linear manner in and/or opposite to an actuating direction (S) over at least 75% of its entire length, that the actuating direction (S) deviates from a horizontal direction by a maximum of 40%, that the actuating direction (S) deviates from a normal direction (N) of an average area normal of a portion of a transport path provided for web-type printing substrate (02) lying entirely in an active region of the at least one first energy output device (302; 317) by a maximum of 40%, and that the normal direction (N) of the average area normal is determined as an average over all directions of area normals of tangent planes at all area elements of the transport path provided for the printing substrate (02) in the active region of the at least one first energy output device (302; 317).
2. The printing press according to Claim 1, characterized in that a threading means for threading a printing substrate web (02) which is movable along at least one threading path is arranged or at least can be arranged at least temporarily at least within the at least one dryer unit (300) .
3. The printing press according to Claim 1 or 2, characterized in that at least two different stop positions of the at least one first energy output device (302; 317) are provided, in which the at least one first energy output device (302; 317) can be purposefully arranged depending on operation mode and/or that at least two different stop positions of the at least one energy output device (302; 317) in relation to the actuating direction (S) are provided, in which the at least one first energy output device (302; 317) can be purposefully arranged depending on operation mode.
4. The printing press according to Claim 1 or 2 or 3, characterized in that the at least one dryer (301) is designed as a radiation dryer (301) and/or that the at least one first energy output device (302; 317) is designed as at least one controllable and/or regulatable radiation source (302) and/or that at least one dryer (301) is designed as a flow dryer (301) and/or that the at least one first energy output device (302; 317) is designed as at least one air supply line (317).
5. The printing press according to Claim 1 or 2 or 3 or 4, characterized in that at least one actuating drive is arranged, by means of which a movement of the at least one energy output device (302; 317) can be achieved along the actuating distance and/or that the actuating distance extends in a continuously linear manner in and/or opposite to an actuating direction (S) over its entire length.
6. The printing press according to Claim 1 or 2 or 3 or 4 or 5, characterized in that a transport direction provided for the web-type printing substrate (02) in the active region of the at least one first energy output device (302; 317) has a vertical component which points downward.
7. The printing press according to Claim 1 or 2 or 3 or 4 or 5 or 6, characterized in that a transport path provided for printing substrate (02) is specified by the printing assembly (200) by means of at least two guide elements (241) of the printing assembly (200) and that a main conveying direction (B) of the at least one printing assembly (200) upstream of the at least one dryer unit (300) in the case of guiding elements (241) arranged in their working position specified by means of a linear connection between a first guide element (241) of the at least one printing assembly (200) arranged upstream of the at least one dryer unit (300) based on a print section (226) of the transport path provided for the printing substrate (02) and a last guide element (241) of the at least one printing assembly (200) arranged upstream of the at least one dryer unit (300) based on a print section (226) of the transport path provided for the printing substrate (02) has a component pointing upward.
8. The printing press according to Claim 1 or 2 or 3 or 4 or 5 or 6 or 7, characterized in that at least one printing assembly (200) has at least two inkjet print heads (221) by means of which respective application locations for printing fluid are specified and that by means of at least two stationary guide elements (241) of the at least one printing assembly (200) a transport path provided for the printing substrate (02) is specified by the printing assembly (200) and that a print section (226) of the transport path provided for printing substrate (02) begins at a first application location of the printing assembly (200) along this provided transport path and ends at a last application location of the printing assembly (200) along the print section (226) of this provided transport path and that along the print section (226) of this provided transport path at least five stationary guide elements (241) specifying the transport path are arranged one behind the other.
9. The printing press according to Claim 7 and 8, characterized in that, in the case of guide elements arranged in their maintenance position, the main conveying direction (B) is arranged at an angle of a maximum of 30° to a vertical direction.
10. The printing press according to Claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9, characterized in that the actuating distance is the distance along which the at least one energy output device (302; 317) is moved and/or can be moved.
11. The printing press according to Claim 7 or 8 or 9 and claim 10, characterized in that along the print section (226) of this provided transport path at least two stationary guide elements (241) specifying the transport path are arranged one behind the other.
12. The printing press according to Claim 11, characterized in that these at least two guide elements (241) specifying this provided transport path in the region of the print section (226) are pivotably arranged around at least one common pivot axis (281; 282) and/or that these at least two guide elements (241) specifying this provided transport path in the region of the print section (226) are pivotably arranged around at least one common pivot axis (281; 282) in order to move these at least two guide elements (241) between a respective working position and a respective maintenance position.
13. The printing press according to Claim 7 or 8 or 9 and claim 10 or 11 or 12, characterized in that, with the exception of straight sections, the provided transport path is curved only in one direction from a beginning of the print section (226) in the at least one printing assembly (200) to an end of the active region of the at least one first energy output device (302; 317).
14. The printing press according to Claim 7 and claim 8 or 9 or 10 or 11 or 12 or 13, characterized in that, when guide elements are arranged in their working position, the main conveying direction is aligned by an angle of at least 10° and a maximum of 70° to a horizontal plane and that the main conveying direction (B) is oriented orthogonally to a transverse direction (A).
15. The printing press according to Claim 7 or 8 or 9 or 10 or 11 or 12 or 13 or 14, characterized in that the at least one drying unit (300) with the at least one first dryer (301) is arranged along the transport path provided for the printing substrate (02) after the at least one first printing assembly (200), which has a region of the transport path provided for the printing substrate (02) designed as a drying section, which is specified by the active region of the at least one dryer and that in at least half of the total drying section of the transport path provided for the printing substrate (02) a transport direction provided for the printing substrate (02) has at least one vertical component which is larger than any existing horizontal component of this transport direction.

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