EP4045322B1 - Gravure printing machine and method for applying at least one printing fluid onto at least one substrate - Google Patents

Description

The invention relates to an intaglio gravure printing machine according to the preamble of claim 1 and a method for applying at least one printing fluid to at least one substrate according to the preamble of claim 9.

The DE 10 2013 223 826 A1 shows a gravure printing machine with a forme cylinder and an impression cylinder.

The EP 2 979 867 A1 discloses a printing machine with a cylinder having a printing plate with depressions. An inkjet printer prints ink into the recesses of the printing plate. The ink is transferred to a substrate and dried before the substrate is released from the cylinder.

The DE 696 31 782 T2 teaches a printing system with a printing element designed as an engraving cylinder for selectively receiving ink in an ink receiving area designed as depressions with a plurality of ink-receiving points. An ink image is formed on a portion of the ink-receiving dots by at least one printing unit for applying ink to the printing element. The ink image is transferred to a printing substrate through a transfer system with a printing cylinder.

The US 2018/0001613 A1 discloses a printing press with an intaglio gravure printing unit. An ink collecting cylinder is arranged on the forme cylinder. A wiping cylinder removes excess printing ink from the forme cylinder. Movable inking units are arranged on the ink collecting cylinder.

The US 2009/128610 A1 discloses a printing device, wherein a first application unit, a second application unit and a third application unit are arranged on a forme cylinder in the direction of rotation after a printing nip in this order. The first application unit applies a liquid which increases the wettability of the surface of the forme cylinder. The second application unit applies a liquid that reduces the flow of ink on the forme cylinder. The third application unit, an inkjet print head, applies ink to the forme cylinder. In the direction of rotation of the forme cylinder in front of the first application unit, for example, a wiping device with a wiping cylinder is arranged.

The DE 10 2012 017 284 A1 teaches a device for printing printing material, which comprises a first printing press cylinder that contacts the printing material in a printing gap and a second printing press cylinder. The second printing press cylinder transfers a previously applied print image of a first printing ink onto the printing material. An inkjet printing device applies an additional variable print image made of ink directly to an ink-free peripheral section of the second printing press cylinder.

The invention is based on the object of creating an intaglio gravure printing machine and a method for applying at least one printing fluid to at least one substrate.

The object is achieved according to the invention by the features of claim 1 and claim 9. The dependent claims show advantageous developments and/or designs of the solution found.

The advantages that can be achieved with the invention are, in particular, that a compact and easy-to-use printing machine designed as an intaglio gravure printing machine is created. The one designed as an intaglio gravure printing machine Gravure printing machine is preferably designed for security printing. The gravure printing machine designed as an intaglio gravure printing machine is characterized in that it comprises at least one forme cylinder, which in one embodiment has at least one printing plate with at least one engraving. The gravure printing machine designed as an intaglio gravure printing machine advantageously comprises at least one transport means for supplying substrate to the at least one forme cylinder and/or at least one impression cylinder. At least one inking unit and/or at least one ink collecting cylinder, to which at least one inking unit is assigned, is arranged on the at least one forme cylinder. The gravure printing machine designed as an intaglio gravure printing machine comprises, in particular the at least one gravure printing unit, at least one print head, in particular at least one non-impact print head and/or inkjet print head, which is arranged on the at least one forme cylinder or on the at least one impression cylinder.

Advantageously, the at least one printing plate is inked and/or can be inked with printing fluid only within the at least one engraving by means of the at least one print head, in particular an inkjet print head. This enables a particularly thin design of the width and/or fine line thickness of the at least one engraving of the at least one printing plate. The printing fluid is advantageously finely dosed on the at least one printing plate. Different printing fluids can advantageously be arranged on the printing plate in two adjacent and/or two mutually adjacent engravings, in particular without mixing the printing fluids with one another. Advantageously, the use of the at least one print head, in particular an inkjet print head, ensures economical consumption of printing fluid. In addition, a change of pressure fluid is easy to carry out and/or carry out. The fine dosage of printing fluid on the at least one printing plate by the at least one print head, in particular inkjet print head, is advantageously a high color resolution on the at least one substrate, in particular a respective use of the at least one substrate, designed to produce.

By arranging at least one wiping device on the at least one forme cylinder in one embodiment, excess printing fluid can be removed and/or is removed before application to the at least one substrate.

Printing fluids, which are used in particular in gravure printing, have a long drying time. For example, they are not dry when a printed substrate reaches at least one delivery of the gravure printing machine. The result is a smearing of printing fluid on the substrate in question and/or an unwanted transfer of printing fluid to an adjacent substrate or to parts, for example a side opposite the printed side, of an adjacent substrate in the delivery. In addition, a stack height of a display stack in the case of sheet-shaped substrates is therefore limited to a maximum of 100 substrates, preferably a maximum of 300 substrates, preferably a maximum of 500 substrates. Advantageously, the arrangement and/or use of at least one print head enables these disadvantages to be improved. Advantageously, at least one protective layer and/or at least one protective film is produced on the substrate, which is designed to prevent smearing of printing fluid, in particular in the at least one delivery. Advantageously, at least the printing fluid which was ejected by the at least one print head is dried before the arrival of the substrate in the delivery and/or before placing a sheet-shaped substrate on a delivery stack or before rolling up a web-shaped substrate in the delivery. Advantageously, a stack height of at least 100 substrates, preferably at least 300 substrates, more preferably at least 500 substrates, more preferably at least 800 substrates, is possible in the at least one display stack.

One version is designed as an intaglio gravure printing machine Gravure printing machine characterized in that the at least one print head, in particular the at least one inkjet print head, is arranged on the circumference of the at least one forme cylinder, through which the at least one engraving can be and/or is colored with at least one printing fluid. It comprises a gravure printing unit of the intaglio gravure printing machine at least the at least one forme cylinder and the at least one print head, in particular the at least one inkjet print head, and the at least one impression cylinder. The Intaglio gravure printing machine is characterized in particular by a simple structure, particularly of the gravure printing unit of the gravure printing machine. A complex supply of printing fluid to the at least one forme cylinder via at least one cylinder upstream of the forme cylinder along the path of printing fluid, for example at least one ink collecting cylinder and/or at least one stencil cylinder and/or at least one ductor roller, is eliminated in the advantageous embodiment of the gravure printing machine.

Further advantages can be seen from the following description.

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

Fig. 1

eine schematische Darstellung einer Tiefdruckmaschine mit zumindest einem Tintenstrahldruckkopf für den Auftrag von Druckfluid;

Fig. 2

eine schematische Darstellung einer alternativen Tiefdruckmaschine mit zumindest einem Farbwerk und zumindest einem Tintenstrahldruckkopf;

Fig. 3

eine weitere schematische Darstellung einer Tiefdruckmaschine aus Fig. 1 mit zumindest einem Tintenstrahldruckkopf für den Auftrag von Druckfluid und zumindest einem weiteren Tintenstrahldruckkopf für den Auftrag zumindest einer Schutzschicht.

Show it:

Fig. 1

a schematic representation of a gravure printing machine with at least one inkjet print head for applying printing fluid;

Fig. 2

a schematic representation of an alternative gravure printing machine with at least one inking unit and at least one inkjet print head;

Fig. 3

another schematic representation of a gravure printing machine Fig. 1 with at least one inkjet print head for applying printing fluid and at least one further inkjet print head for applying at least one protective layer.

A printing machine is a machine which applies and/or is capable of applying at least one printing fluid to at least one substrate 10, in particular at least one web-shaped or sheet-shaped substrate 10. The printing machine is designed as an intaglio gravure printing machine, for example as a steel engraving printing machine. The gravure printing machine, preferably the intaglio gravure printing machine, is preferably designed as a security printing machine.

In the foregoing and below, a printing fluid preferably refers to inks and other materials that are transferred and/or can be transferred to the at least one substrate 10 by at least one print head 04, designed in particular as an inkjet print head 04, and/or by at least one inking unit 18. The printing fluid preferably creates a texture on the at least one substrate 10, preferably in a finely structured form and/or not just over a large area, which is preferably visible and/or can be felt through sensory impressions and/or can be detected by machine. Preferably, a printing fluid located in a volume of the at least one print head 04 can be used , especially in the form of drops, leave the volume of the print head 04 in question through an opening, in particular a nozzle. Inks are preferably solutions or dispersions of at least one colorant in at least one solvent. Suitable solvents include, for example, water and/or organic solvents. Alternatively or additionally, the printing fluid can be designed as a printing fluid that crosslinks under UV light. Inks are relatively low-viscosity printing fluids. Inks have no binder or relatively little binder. Colorants can be pigments and/or dyes, where pigments are insoluble in the respective solvent, while dyes are soluble in the respective solvent. In particular, inks that have dyes as colorants preferably no binder.

At least one printing fluid, preferably the at least one printing fluid, is designed as ink in one embodiment. Preferably, the at least one printing fluid, preferably the at least one printing fluid designed as ink, has a viscosity of at least 0.02 Pa*s (zero point zero two pascal seconds), preferably of at least 0.05 Pa*s (zero point zero five pascal seconds) , more preferably of at least 0.1 Pa*s (zero point one pascal seconds), at a temperature of 25°C (twenty-five degrees Celsius). Preferably, the at least one printing fluid, preferably the at least one printing fluid designed as ink, has a viscosity of a maximum of 20 Pa*s (twenty pascal seconds), preferably of a maximum of 15 Pa*s (fifteen pascal seconds), more preferably of a maximum of 10 Pa*s ( ten pascal seconds) at a temperature of 25°C (twenty-five degrees Celsius). The viscosity is determined and/or can be determined, for example, by at least one measurement using a rotational viscometer with a single cylinder in accordance with DIN EN ISO 2555:2018-09. Preferably, the at least one printing fluid, preferably the at least one printing fluid designed as ink, is colored. For example, additionally or alternatively, the at least one pressure fluid is designed as a magnetic pressure fluid. A magnetic printing fluid preferably has at least one pigment that is magnetizable and/or magnetic and/or can be aligned and/or aligned by magnetization.

Preferably, this produces at least one printing fluid, in particular ink, which is used in gravure printing, on a respective substrate 10 a layer with a thickness of at least 1 μm (one micrometer), preferably at least 3 μm (three micrometers), more preferably at least 10 μm (ten micrometers), and/or a maximum of 70 µm (seventy micrometers), preferably a maximum of 60 µm (sixty micrometers), more preferably a maximum of 50 µm (fifty micrometers). For example, if the at least one printing fluid designed as ink preferably has at least one pigment, the at least one printing fluid designed as ink has a drying time Air under standard conditions (SATP conditions with 25 ° C and 1.013 bar) of at least 6 hours, preferably at least 12 hours, preferably up to a maximum of 84 hours, preferably up to a maximum of 72 hours.

The printing press designed as an intaglio gravure printing machine comprises at least one forme cylinder 03. The forme cylinder 03 is preferably designed as a plate cylinder 03, more preferably as an intaglio cylinder 03, more preferably as a printing forme cylinder 03. In one embodiment, the at least one forme cylinder 03 has at least one printing forme 02, in particular a printing plate 02, in particular a detachable printing forme 02 designed as a printing plate 02. The at least one forme cylinder 03 preferably has at least two, more preferably exactly two, printing plates 02. The at least one printing plate 02 of the at least one forme cylinder 03 has at least one engraving, preferably at least two engravings, preferably at least four engravings, more preferably a plurality of engravings. The at least one engraving preferably corresponds to a print pattern of a print area to be printed on the at least one substrate 10. The at least one engraving preferably has a thin width and/or a fine line width and/or accurately depicts a respective print image to be printed on the at least one substrate 10. Printing fluid is preferably transferable from the at least one printing plate 02, which is located in particular within the at least one engraving, to the at least one substrate 10 and/or is transferred to the at least one substrate 10. The at least one forme cylinder 03 is designed to print on the at least one substrate 10 with printing fluid. In particular, the at least one forme cylinder 03 is designed to print the at least one substrate 10 with printing fluid under high pressure.

Preferably, the at least one engraving of the at least one forme cylinder 03 is designed to produce at least one haptic sensory impression, preferably at least one relief, on the at least one substrate 10. Each engraving is preferably designed to produce at least a haptic sensory impression. This is preferred at least one engraving is designed to produce at least one haptic sensory impression, preferably at least one relief, during a color transfer to the at least one substrate 10. The at least one haptic sensory impression, preferably the at least one relief, is preferably created by placing the forme cylinder 03 against the impression cylinder 01 under high pressure.

The substrate 10 can previously and subsequently be printed by the gravure printing machine with a medium, in particular the at least one printing fluid. Preferably, the at least one substrate 10 is designed as a web or sheet and/or has at least two panels, for example at least four panels, preferably at least eight panels. Preferably, the at least one substrate 10 printed and/or printable by the gravure printing machine, preferably intaglio gravure printing machine, is designed as a web or sheet and/or preferably the at least one substrate 10 has the at least two uses. In the foregoing and below, the term benefit preferably refers to the number of identical objects that are manufactured from the same piece of material and/or are arranged on a common substrate 10, for example a common sheet and/or a web. A benefit is preferably that area of the sheet and/or the web which is designed as a product of the gravure printing machine, in particular as an intermediate product for producing an end product, and/or is, for example, further processed into a desired or required end product and/or is designed to be further processed . Here, the desired and/or required end product, which was preferably produced by further processing of the respective benefit, is preferably a banknote and/or a security. In addition, the term use in the foregoing and below preferably refers to the number of identical objects which are arranged on the at least one printing forme 02 of the at least one forme cylinder 03 and/or which on the at least one printing forme 02 correspond to that area of the substrate 10 which is considered a Product of the gravure printing machine, in particular as an intermediate product for producing an end product, is designed and / or, for example, to desired or required end product is further processed and / or is designed to be further processed. The at least one printing forme 02 of the at least one forme cylinder 03 preferably has at least one benefit, preferably at least two benefits, more preferably at least four benefits, more preferably a plurality of benefits.

The gravure printing machine has at least one impression cylinder 01. The impression cylinder 01 is preferably arranged opposite the at least one forme cylinder 03 with respect to a transport path of substrate 10. The at least one impression cylinder 01 has at least one contact area with the at least one forme cylinder 03, which preferably describes the shortest distance between the forme cylinder 03 and the impression cylinder 01 and/or in which the forme cylinder 03 is at least temporarily in contact with the impression cylinder 01 via the substrate 10 There is contact and/or which forms a pressure point. The impression cylinder 01 is preferably designed as a transport cylinder 01, more preferably as a printing cylinder 01, which is designed in particular to transport the at least one substrate 10. The impression cylinder 01 is preferably designed to transport the at least one substrate 10 to the at least one printing point and/or away from the at least one printing point. The impression cylinder 01 has, for example, at least one, for example, elastic and/or compressible support 08, preferably at least two supports 08, which are arranged on its lateral surface. Preferably, the at least one impression cylinder 01, in particular the at least one support 08, and the at least one forme cylinder 03, in particular the at least one pressure plate 02, are in operative connection with one another and/or have a contact pressure with one another at least at times.

The gravure printing machine preferably comprises at least one transport means 06; 09 for supplying substrate 10 to the at least one forme cylinder 03 and the at least one impression cylinder 01. The one intended for the transport of a substrate 10 The area of space that the substrate 10 occupies at least temporarily when it is present is the transport route. Preferably, along the transport path of substrate 10, there is at least one transport means 06 in front of the at least one forme cylinder 03; 09 for supplying substrate 10 to the at least one forme cylinder 03 arranged. For example, at least one means of transport 06 is designed as a transfer cylinder 06. Preferably, at least one transfer cylinder 06, more preferably at least two transfer cylinders 06, for example three transfer cylinders 06, are arranged along the transport path in front of the at least one forme cylinder 03. For example, at least one means of transport 09 is designed as a feed device 09. For example, the at least one feed device 09 is designed as a swing gripper 09 and/or as a conveyor roller 09.

Preferably, at least one transport means 11 designed as a transfer cylinder 11 is arranged along the transport path after the at least one forme cylinder 03, which is preferably designed to guide the substrate 10 away from the at least one forme cylinder 03. For example, the at least one transfer cylinder 11 arranged after the forme cylinder 03 has at least one gripper and/or the substrate 10 is designed to be transported only with support in an edge region of the respective substrate 10, i.e. not over the entire circumference, on the circumference of the transfer cylinder 11 in question . After the impression cylinder 01, the gravure printing machine preferably comprises at least one transfer cylinder 11, preferably at least two transfer cylinders 11, more preferably exactly two transfer cylinders 11.

Preferably, additionally or alternatively, at least one transport means 20 designed as a conveyor system 20 and/or belt system 20 is arranged along the transport path of the at least one substrate 10 after the at least one printing point, the contact area of the forme cylinder 03 and impression cylinder 01, which conveys the at least one substrate 10 and/or is designed to be transportable. Preferably this is at least one means of transport 20 on the at least one Impression cylinder 01 is arranged and/or preferably the at least one transport means 20 is designed to further transport the at least one substrate 10 from the impression cylinder 01. The at least one transport means 20 preferably has at least one roller 19, which is designed to drive the transport means 20. For example, the at least one dryer 07, preferably at least one of the dryers 07, is arranged on the at least one conveyor system 20 and is preferably additionally directed towards the printed side of the substrate 10.

The intaglio gravure printing machine has at least one print head 04, preferably at least one print head 04 designed as an inkjet print head 04 and/or inkjet print head 04. In one embodiment, the at least one print head 04, preferably designed as an inkjet print head 04, is arranged on the circumference of the at least one forme cylinder 03, through which the at least one engraving can be and/or is colored with the at least one printing fluid. The at least one print head 04, in particular the at least one inkjet print head 04, is preferably designed as an inkjet print head 04 and/or non-impact print head 04. Preferably, the at least one inkjet print head 04 is arranged in at least one nozzle bar, which is preferably arranged parallel to a rotation axis of the at least one forme cylinder 03. The at least one nozzle bar preferably comprises at least one inkjet print head 04, in particular at least two inkjet printheads 04. Preferably at least two inkjet printheads 04, more preferably at least four inkjet printheads 04, are arranged on the at least one forme cylinder 03, the at least two inkjet printheads 04 being arranged along a rotation direction of the at least a forme cylinder 03, in particular orthogonal to the axis of rotation of the forme cylinder 03, arranged one behind the other on which at least one forme cylinder 03 is arranged. Preference is given to at least two nozzle bars, more preferably at least four nozzle bars, each with at least one printhead 04, preferably designed as an inkjet printhead 04, preferably at least two printheads 04, preferably designed as inkjet printheads 04 preferably at least four print heads 04, preferably designed as inkjet print heads 04, arranged one behind the other on the at least one forme cylinder 03 along the direction of rotation of the at least one forme cylinder 03. The at least one print head 04, in particular the at least one non-impact print head 04, is designed to apply at least one printing fluid, preferably without contact, to at least one surface of the at least one substrate 10, which faces at least one nozzle and/or opening of the print head 04.

For example, all print heads 04 of a nozzle bar, which are preferably designed as inkjet print heads 04, have the same printing fluid. In a preferred embodiment, the at least one print head 04 of a first nozzle bar, preferably designed as an inkjet print head 04, has a different printing fluid, in particular a printing fluid of a different color, to at least one print head 04, preferably designed as an inkjet print head 04, of at least a second nozzle bar. For example, the at least two nozzle bars have pressure fluids that are different from one another, in particular pressure fluids of different colors. Alternatively, the at least one inkjet print head 04 of a first nozzle bar has an identical printing fluid, in particular a printing fluid of identical color, to at least one inkjet print head 04 of at least a second nozzle bar.

For example, the at least one print head 04 arranged on the at least one forme cylinder 03, in particular inkjet print head 04, is designed to have at least one printing fluid in the form of ink. A print head 04, in particular inkjet print head 04 and/or non-impact print head 04, which has at least one ink, in particular colored ink, is preferably designed as a color print head. Preferably, the at least one print head 04 designed as a color print head has an ink of the color cyan and/or magenta and/or yellow and/or black. For example, alternatively, the at least one is designed as a color print head Print head 04 has a special color.

The printing press has at least one printing unit. In the case of the gravure printing machine, in particular intaglio gravure printing machine, the at least one printing unit is designed as a gravure printing unit, preferably as an intaglio gravure printing unit. The at least one gravure printing unit, preferably intaglio gravure printing unit, has the at least one forme cylinder 03 and the at least one impression cylinder 01. The at least one gravure printing unit of the gravure printing machine, preferably intaglio gravure printing unit, comprises at least the at least one forme cylinder 03 and the at least one print head 04, in particular inkjet print head 04, and the at least one impression cylinder 01.

Preferably, at least one dryer 07 is arranged along the transport path of substrate 10 after the at least one forme cylinder 03, in particular after the at least one contact area of the at least one forme cylinder 03 to the at least one impression cylinder 01 and/or after the printing point. Preferably, the at least one dryer 07 is arranged along a transport path of substrate 10 after the at least one forme cylinder 03 and/or before depositing the at least one substrate 10 in at least one display stack. The at least one dryer 07 is preferably arranged outside the transport path and directed towards the transport path. In particular, the at least one dryer 07 is directed towards that side of the at least one substrate 10 which is printed with the at least one printing fluid by the at least one forme cylinder 03. The at least one dryer 07 is preferably designed as a radiation dryer and/or electron beam dryer and/or UV dryer (ultraviolet radiation dryer) and/or infrared radiation dryer (IR dryer) and/or near infrared radiation dryer (NIR dryer). The at least one dryer 07 preferably has electron radiation and/or UV radiation (ultraviolet radiation) and/or infrared radiation (IR radiation) and/or NIR radiation (near-infrared radiation) as a form of radiation. Near-infrared radiation describes short-wave infrared radiation with wavelengths of at least 760 nm (seven hundred and sixty nanometers) up to a maximum of 3,000 nm (three thousand nanometers), preferably up to a maximum of 2,500 nm (two thousand five hundred nanometers), more preferably up to a maximum of 1,400 nm (one thousand four hundred nanometers). For example, at least two dryers 07 are arranged after the at least one forme cylinder 03, in particular after the at least one contact area of the at least one forme cylinder 03 to the at least one impression cylinder 01. Preferably, at least one of the at least two dryers 07 is arranged on the at least one transfer cylinder 11, preferably on the second transfer cylinder 11, along the transport path after the at least one forme cylinder 03. The at least two dryers 07 are preferably directed towards the same side of the at least one substrate 10. For example, the at least two dryers 07 have identical forms of radiation, in particular electron radiation and/or UV radiation and/or infrared radiation and/or NIR radiation. Alternatively, the at least two dryers 07 have different forms of radiation from one another. In particular, the at least one dryer 07 is designed to at least partially dry the at least one printing fluid on the respective substrate 10. Preferably, at least the printing fluid of the at least one print head 04 is dried by the at least one dryer 07 designed as a radiation dryer and/or electron beam dryer and/or UV dryer and/or infrared radiation dryer and/or NIR dryer.

In one embodiment, at least one cleaning device 05 designed as a wiping device 05 is arranged on the at least one forme cylinder 03. The at least one cleaning device 05 designed as a wiping device 05 is arranged along the direction of rotation of the at least one forme cylinder 03 after the at least one inkjet print head 04 and in front of the contact area of the at least one forme cylinder 03 with the at least one impression cylinder 01. Preferably, the at least one cleaning device 05, which is preferably designed as a wiping device 05, comprises at least one wiping cylinder. The at least one cleaning device 05 is preferably designed with at least one wiping cylinder.

Preferably, the at least one wiping cylinder is attached to the at least one forme cylinder 03. For example, the at least one wiping cylinder in production operation has an opposite direction of rotation to the at least one assigned forme cylinder 03, the peripheral speed of the wiping cylinder being, for example, higher than the peripheral speed of the relevant forme cylinder 03. For example, alternatively, the at least one wiping cylinder has the same direction of rotation in production operation at least one assigned forme cylinder 03. Preferably, the at least one cleaning device 05, designed in particular as a wiping device 05, is designed to remove printing fluid from the at least one printing plate 02, in particular that printing fluid which is placed outside the at least one engraving on the at least one printing plate 02. The at least one wiping cylinder is preferably designed to be immersed in cleaning fluid, preferably also called washing fluid. Preferably, additionally or alternatively, the at least one wiping device 05 has at least one nozzle which sprays the wiping cylinder with cleaning liquid. Preferably, additionally or alternatively, the at least one wiping device 05 is designed to clean the at least one wiping cylinder, preferably with each revolution of the wiping cylinder. The at least one wiping cylinder is preferably in contact with a washing fluid supply, preferably immersion contact. Preferably, the cleaning liquid frees the lateral surface of the wiping cylinder from the pressure fluid removed from the forme cylinder 03. For this purpose, the wiping cylinder can be immersed in a washing fluid and preferably additionally or alternatively by suitable devices, e.g. B. squeegees and/or brushes can be stripped off. The washing fluid is, for example, in a fluid container, e.g. B. a washing box, in which the wiping cylinder is partially immersed for cleaning.

At least one inking unit 18 and/or at least one ink collecting cylinder 12, to which at least one inking unit 18, preferably the at least one inking unit 18, is assigned, is arranged on the at least one forme cylinder 03. That is preferred at least one inking unit 18 and/or the at least one ink collecting cylinder 12 is arranged along the direction of rotation of the at least one forme cylinder 03 in front of the contact area of the at least one forme cylinder 03 with the at least one impression cylinder 01. Preferably, the at least one inking unit 18 comprises at least one ink fountain 16 with at least one roller 14 designed as a ductor roller 14, and at least one roller 15 designed as an inking roller 15. Preferably, the at least one inking unit 18 further comprises at least one roller 13 and/or designed as a stencil roller 13 at least one roller 17 designed as a friction roller 17. Preference is given to at least one printing fluid, preferably designed as ink, in particular at least one colored printing fluid, from the at least one ink fountain 16 via the at least one roller 13; 14; 15; 17 transferred to the at least one ink collecting cylinder 12. The at least one printing fluid of the at least one inking unit 18 and/or ink collecting cylinder 12 is designed in one embodiment as ink, preferably as gravure ink. For example, the at least one printing fluid of the at least one inking unit 18 and/or the at least one ink collecting cylinder 12 has at least one color, for example yellow and/or green and/or red and/or blue and/or black and/or at least one special color.

Preferably, at least two inking units 18, for example at least four inking units 18, preferably at least six inking units 18, are arranged on the at least one ink collecting cylinder 12. The at least one ink collecting cylinder 12 preferably has at least the respective printing fluid of the at least one inking unit 18, preferably of the at least two inking units 18. In particular, the at least two printing fluids of the at least two inking units 18 can be arranged and/or arranged next to one another on the at least one ink collecting cylinder 12, in particular in the circumferential direction of the ink collecting cylinder 12, one behind the other and/or preferably additionally orthogonally to the circumferential direction. The at least one gravure printing unit is preferably designed as a printing unit for indirect gravure printing. Here, in particular, the at least one ink collecting cylinder 12 is between the at least one inking unit 18 and the at least one forme cylinder 03 is arranged. This creates a preferably indirect transfer of ink from the at least one inking unit 18 to the at least one forme cylinder 03.

In one embodiment, the at least one forme cylinder 03 is provided by the at least one ink collecting cylinder 12 with the at least one printing fluid, in particular the at least one printing fluid designed in particular as ink, more preferably the at least one colored printing fluid, at least partially, in particular in the area of the at least one engraving and /or at least colored in the at least one engraving, more preferably exclusively in the at least one engraving. Alternatively or additionally, the at least one forme cylinder 03 is supplied by the at least one inking unit 18 with the at least one printing fluid, in particular the at least one printing fluid designed in particular as ink, more preferably the at least one colored printing fluid, at least partially, in particular in the area of the at least one engraving and /or at least colored in the at least one engraving, more preferably exclusively in the at least one engraving. The at least one inking unit 18 and/or the at least one ink collecting cylinder 12 colors the at least one engraving of the at least one forme cylinder 03 with at least one printing fluid designed as ink. Preferably, along the direction of rotation of the at least one forme cylinder 03 after the at least one ink collecting cylinder 12, the at least one cleaning device 05 is arranged on the at least one forme cylinder 03, which at least partially removes excess printing fluid that colors the forme cylinder 03 outside of the at least one engraving. Preferably, the at least one cleaning device 05 is arranged along the direction of rotation of the at least one forme cylinder 03 after the at least one inking unit 18 and/or after the at least one ink collecting cylinder 12 on the at least one forme cylinder 03. The at least one wiping device 05 is preferably arranged along the direction of rotation of the forme cylinder 03 after the at least one inking unit 18 and/or ink collecting cylinder 12 and/or after the at least one print head 04. Preferably it is at least one Cleaning device 05, preferably designed as a wiping device 05, is arranged along the direction of rotation of the at least one forme cylinder 03 after the at least one print head 04 and after the at least one inking unit 18 and/or ink collecting cylinder 12 on the at least one forme cylinder 03. Preferably, the at least one inking unit 18 and/or the at least one ink collecting cylinder 12 is arranged along the direction of rotation of the at least one forme cylinder 03 between the at least one print head 04 and the at least one cleaning device 05, which is preferably designed as a wiping device 05. In one embodiment, the at least one cleaning device 05 designed as a wiping device 05 is arranged along the direction of rotation of the at least one forme cylinder 03 in front of the contact area of the at least one forme cylinder 03 with the at least one impression cylinder 01, which is preferably designed as a printing point.

For example, the at least one print head 04, in particular inkjet print head 04 and/or non-impact print head 04, works according to the drop-on-demand principle, with drops of printing fluid being generated specifically as needed. For example, alternatively, the at least one print head 04, in particular inkjet print head 04 and/or non-impact print head 04, acts as a continuous print head 04, with printing fluid drops being continuously generated and deflected as required during their flight.

The gravure printing machine, in particular the at least one gravure printing unit, comprises the at least one print head 04 and/or inkjet print head 04 and/or inkjet print head 04 and/or non-impact print head 04, which has at least one printing fluid that is different from the printing fluid formed as at least one ink having. In a preferred embodiment, this at least one print head 04 and/or inkjet print head 04 and/or inkjet print head 04 is designed as a coating print head. Preferably, the at least one print head 04 has at least one printing fluid which is designed to be transparent. Preferably additional or alternative the at least one printing fluid of the at least one print head 04, preferably of the at least one coating print head, is formed as a varnish and/or as a UV varnish, for example as a clear varnish. This preferably forms at least one printing fluid of the at least one print head 04, preferably of the at least one coating print head, at least one protective layer and/or at least one protective film on the at least one substrate 10 printed and/or printable by the gravure printing machine, in particular intaglio gravure printing machine the gravure printing machine, in particular intaglio gravure printing machine, has at least one nozzle bar, which comprises at least two print heads 04, preferably a plurality of print heads 04, which print heads 04 are preferably arranged orthogonally to the transport path and/or at least partially next to one another.

For example, in at least one embodiment, the at least one print head 04 applies at least one numbering and/or at least one symbol and/or at least one marking to the at least one substrate 10.

Preferably, the at least one print head 04, preferably at least the at least one coating print head, is designed to apply printing fluid as a thin layer, preferably as a thin transparent layer, to the at least one substrate 10. Preferably, the at least one printing fluid of the at least one print head 04, which preferably differs from the at least one printing fluid designed as ink, forms at least one protective layer and/or at least one protective film on the at least one substrate 10. Preference is given to the respective protective layer and/or the respective protective film is attached at least locally to the surface of the substrate 10, in particular at that at least one position at which the relevant substrate 10 has at least one printing fluid, preferably in the form of ink. In one embodiment, the at least one forme cylinder 03 is designed to transfer at least one printing fluid designed as ink to at least one substrate 10. The at least one print head 04 has the at least one printing fluid, which the at least one print head 04 has the at least one substrate 10 is designed to transmit directly or indirectly at that position of the at least one printing fluid designed as ink. For example, the at least one print head 04 produces a flat layer which covers the surface of the substrate 10 at least partially, preferably completely. For example, at least those areas of the substrate 10 which have a layer thickness of printing fluid formed as ink of at least 5 μm (five micrometers), preferably of at least 15 μm (fifteen micrometers), more preferably of at least 25 μm (twenty-five micrometers), are particularly additionally colored and/or coated with the at least one printing fluid of the at least one print head 04.

In one embodiment, the gravure printing machine, in particular intaglio gravure printing machine, comprises at least one print head 04 arranged on the at least one forme cylinder 03. Additionally or alternatively, the gravure printing machine, in particular intaglio gravure printing machine, comprises at least one print head 04 arranged on the at least one impression cylinder 01. The gravure printing machine comprises the at least one print head 04, which is arranged on the at least one forme cylinder 03 or on the at least one impression cylinder 01. Preferably, the relevant at least one print head 04 is arranged on the at least one forme cylinder 03 in such a way that the at least one nozzle and/or opening of the print head 04 is directed towards the at least one forme cylinder 03 and/or that printing fluid directs the print head 04 in the direction of the surface of the is designed to leave at least one forme cylinder 03. Alternatively, the relevant at least one print head 04 is arranged on the at least one impression cylinder 01 in such a way that the at least one nozzle and/or opening of the print head 04 is directed towards the at least one impression cylinder 01 and/or that printing fluid presses the print head 04 in the direction of the surface of the at least one impression cylinder 01 is designed to leave.

In one embodiment, the at least one print head is 04, preferably at least one Print head 04 of the print heads 04, preferably at least one coating print head and/or at least one color print head, on which at least one forme cylinder 03 is arranged. Preferably, the at least one print head 04, preferably the at least one coating print head, is arranged along the direction of rotation of the forme cylinder 03 as the first print head 04 after the at least one printing point. Preferably, the at least one print head 04 along the direction of rotation of the forme cylinder 03 is the first print head 04, which is designed to color the at least one engraving with printing fluid. The at least one print head 04 is designed to color the at least one engraving before inking with the at least one printing fluid designed as ink with the at least one printing fluid of the respective print head 04.

Preferably, the at least one ink collecting cylinder 12 with the at least one inking unit 18 and/or the at least one inking unit 18 is arranged along the direction of rotation of the forme cylinder 03 after the at least one print head 04. The at least one inking unit 18 has at least one printing fluid designed as ink. In one embodiment, the at least one inking unit 18 and/or the at least one ink collecting cylinder 12 is designed to color the at least one engraving of the at least one forme cylinder 03 with at least one printing fluid designed as ink. Along the direction of rotation of the at least one forme cylinder 03, the at least one print head 04 is arranged after the contact area and preferably the at least one inking unit 18 and/or the at least one ink collecting cylinder 12 is arranged after the at least one print head 04.

Preferably, additionally or alternatively, there is at least one further print head 04, for example at least four more, on the at least one forme cylinder 03 along its direction of rotation after the at least one print head 04, preferably which has the printing fluid other than ink and/or which is preferably designed as a coating print head Print heads 04, preferably which have a printing fluid preferably designed as ink and/or which preferably as Color print heads are formed. Within the at least one engraving, the at least two printing fluids, with which the at least one forme cylinder 03 was preferably inked one after the other, are preferably separated from one another, more preferably layered one on top of the other. Due to the transfer of the at least two printing fluids from the at least one engraving to the at least one substrate 10, the at least one printing fluid, preferably in the form of ink, is preferably below the at least one printing fluid, preferably different from ink, of the at least one print head 04, preferably the coating print head, on the substrate 10 arranged. In particular, at least one protective layer and/or a protective film is thus generated on the substrate 10 over the at least one printing fluid, in particular in the form of ink, for example in a locally limited area or over a large area, through which at least one printing fluid of the at least one print head 04 is generated. Preferably, in addition, the printing fluid applied by the at least one print head 04 is preferably applied in the at least one engraving as a separation means between the inner surface of the engraving and the printing fluid by the at least one ink collecting cylinder 12 with the at least one inking unit 18 and/or by the at least one inking unit 18 and/or by the at least one further print head 04, preferably the color print head, designed to act. This means that the at least one printing fluid is preferred, in particular with which the at least one engraving was inked by the at least one ink collecting cylinder 12 with the at least one inking unit 18 and/or the at least one further print head 04, from the at least one engraving preferably completely onto the at least one Substrate 10 transferable and/or is preferably transferred completely.

Additionally or alternatively, in one embodiment, the at least one print head 04, preferably the at least one coating print head, is on the at least one impression cylinder 01 along the transport path of the at least one substrate 10 after the at least one printing point between the at least one forme cylinder 03 and the at least one impression cylinder 01 arranged. This printhead is 04 preferably at least those points on the substrate 10 are designed to be colored with printing fluid to which printing fluid has already been applied at the at least one printing point. In particular, at least one protective layer and/or a protective film is thus generated on the substrate 10 over the at least one printing fluid, in particular in the form of ink, for example in a locally limited area or over a large area, through which at least one printing fluid of the at least one print head 04 is generated.

For example, the gravure printing machine comprises the at least one print head 04, which preferably has a printing fluid other than ink, only at one of the two positions, i.e. either arranged on the at least one impression cylinder 01 or on the at least one forme cylinder 03. Alternatively, the gravure printing machine comprises, for example, print heads 04 at at least two positions within the gravure printing machine, preferably at least one print head 04 arranged on the at least one impression cylinder 01 and at least one print head 04 arranged on the at least one forme cylinder 03. The gravure printing machine, in particular intaglio gravure printing machine, preferably comprises at least two print heads 04, wherein at least a print head 04 on which at least one impression cylinder 01 is arranged and at least one print head 04 on which at least one forme cylinder 03 is arranged.

In particular, at least one delivery of the at least one substrate 10 is arranged after the at least one gravure printing unit. Preferably, printed substrate 10 is collected in the at least one delivery at at least one collection position, for example in the form of at least one delivery stack in the case of a sheet-shaped substrate 10 or in the form of at least one roll in the case of a web-shaped substrate 10. In particular, the at least one delivery has at least one delivery stack or at least one Roll up. The at least one display stack preferably has a stack height of at least 100 substrates 10, preferably of at least 300 substrates 10, more preferably of at least 500 substrates 10, more preferably of at least 800 substrates 10.

Preferably, the at least one dryer 07 is arranged along the transport path of the at least one substrate 10 after the at least one forme cylinder 03 and/or in front of the at least one collecting position of the at least one substrate 10 of the at least one delivery. Preferably, the at least one dryer 07, preferably at least one of the dryers 07, is arranged in front of the at least one display. For example, additionally or alternatively, the at least one dryer 07, preferably at least one of the dryers 07, is arranged in the at least one delivery but in front of the at least one collection position of the at least one substrate 10. At least one of the dryers 07 is preferably designed as a UV dryer.

For example, the at least two printing fluids that are different from one another, in particular the at least one printing fluid that is preferably designed as ink and the at least one printing fluid that is preferably different from ink, have different drying behavior from one another. Preferably, at least the printing fluid of the at least one print head 04, preferably the printing fluid other than ink, is designed to crosslink under UV radiation (ultraviolet radiation) and/or to dry and/or to be dryable by UV radiation. For example, the at least one printing fluid of the at least one inking unit 18 is designed to be drying and/or dryable by thermal radiation, for example infrared radiation and/or heat, or UV radiation or electron beams. Preferably, at least the printing fluid which was ejected by the at least one print head 04 and/or which the at least one print head 04 has, preferably at least the printing fluid other than ink, before the arrival of the substrate 10 in the delivery, in particular in the collecting position, and /or dried before placing a sheet-shaped substrate 10 on a display stack or before rolling up a web-shaped substrate 10 in the display.

The at least one printing fluid is applied to the at least one substrate 10.

The at least one printing fluid designed as ink is applied to the at least one substrate 10. By means of the at least one print head 04, the at least one printing fluid that is different from the printing fluid formed as at least one ink is applied indirectly or directly to the at least one substrate 10.

Preferably, an indirect application of printing fluid to the at least one substrate 10 in the preceding and following describes an application with at least one intermediate step representing a transfer of printing fluid. At least one component of the gravure printing machine, preferably at least the at least one forme cylinder 03 and/or, for example, the at least one ink collecting cylinder 12, takes the printing fluid from a component of the gravure printing machine that ejects and/or dispenses printing fluid, preferably the at least one inking unit 18 and/or preferably the at least a print head 04, before the at least one printing fluid is transferred to the at least one substrate 10.

Preferably, a direct application of printing fluid to the at least one substrate 10 in the preceding and following describes an application of printing fluid from the at least one printing fluid ejecting and/or dispensing component, preferably the at least one inking unit 18 and/or preferably the at least one print head 04, directly onto the at least one substrate 10, preferably without at least one intermediate step representing a transfer of pressure fluid.

In one embodiment, the at least one print head 04 applies its printing fluid indirectly to the at least one substrate 10 by means of at least one inking of the at least one forme cylinder 03 by the at least one print head 04.

In addition, the at least one print head 04 colors the at least one engraving with the printing fluid of the print head 04 before inking the at least one engraving with a printing fluid designed as ink.

Additionally or alternatively, the at least one print head 04 applies its printing fluid to the at least one impression cylinder 01 along the transport path of the at least one substrate 10 after the at least one printing point between the at least one forme cylinder 03 and the at least one impression cylinder 01 directly onto the at least one substrate 10 .

Preferably, additionally or alternatively, at least the printing fluid of the print head 04 is dried along the transport path of substrate 10 after the at least one forme cylinder 03 and/or before the at least one collecting position of substrate 10 of the at least one delivery.

Preferably, additionally or alternatively, the at least one forme cylinder 03, preferably at least the surface of the at least one forme cylinder 03, is cleaned by the at least one cleaning device 05, preferably designed as a wiping device 05. Preferably, the at least one wiping cylinder is immersed in cleaning liquid and/or preferably the at least one wiping cylinder is sprayed with cleaning liquid and/or preferably the at least one wiping device 05 cleans the at least one wiping cylinder.

Reference symbol list

01

Impression cylinder, transport cylinder, printing cylinder

02

printing form, printing plate

03

Forme cylinder, plate cylinder, intaglio cylinder, printing forme cylinder

04

Printhead, Inkjet Printhead, Inkjet Printhead, Non-Impact Printhead

05

Cleaning device, wiping device

06

Means of transport, transfer cylinder

07

dryer

08

edition

09

Means of transport, feed device, swing gripper, conveyor roller

10

Substrate

11

Means of transport, transfer cylinder

12

Paint collection cylinder

13

roller, stencil roller

14

roller, ductor roller

15

Roller, inking roller

16

Color box

17

roller, friction roller

18

Inking

19

role

20

Means of transport, conveyor system, belt system

Claims (14)

1. Intaglio gravure printing press comprising at least one gravure printing unit, comprising at least one forme cylinder (03) and at least one impression cylinder (01), at least one inking unit (18) and/or at least one ink collecting cylinder (12), including at least one assigned inking unit (18), being arranged at the at least one forme cylinder (03), the intaglio gravure printing press comprising at least one print head (04), which is arranged at the at least one impression cylinder (01), or the intaglio gravure printing press comprising at least one print head (04), which is arranged at the at least one forme cylinder (03), at least one wiping device (05) being arranged at the at least one forme cylinder (03), the at least one wiping device (05) being arranged along the direction of rotation of the at least one forme cylinder (03), downstream from the at least one print head (04), when the at least one print head (04) is arranged at the at least one forme cylinder (03), and the at least one wiping device (05) being arranged along the direction of rotation of the at least one forme cylinder (03), upstream from a contact region of the at least one forme cylinder (03) with the at least one impression cylinder (01) .
2. Intaglio gravure printing press according to claim 1, characterized in that the at least one print head (04) at the at least one forme cylinder (03) and the at least one inking unit (18) and/or the at least one ink collecting cylinder (12) are arranged along the direction of rotation of the forme cylinder (03), downstream from the at least one print head (04), and/or that the at least one inking unit (18) and/or the at least one ink collecting cylinder (12) are arranged along the direction of rotation of the at least one forme cylinder (03), upstream from a contact region of the at least one forme cylinder (03) with the at least one impression cylinder (01).
3. Intaglio gravure printing unit according to claim 1 or 2, characterized in that the at least one forme cylinder (03) comprises at least one printing plate (02) including at least one engraving, and/or that at least one dryer (07) is arranged along a transport path of at least one substrate (10), downstream from the at least one forme cylinder (03) and/or upstream from at least one collecting position of at least one substrate (10) of at least one delivery.
4. Intaglio gravure printing press according to claim 1 or 2 or 3, characterized in that at least one further print head (04) is arranged at the at least one forme cylinder (03) along its direction of rotation, downstream from the at least one print head (04).
5. Intaglio gravure printing press according to claim 1 or 2 or 3 or 4, characterized in that the at least one print head (04) comprises at least one printing fluid, which is configured to be transparent, and/or that the at least one printing fluid of the at least one print head (04) is embodied as varnish and/or as UV varnish, and/or that the at least one printing fluid of the at least one print head (04) forms at least one protective layer and/or at least one protective film on at least one substrate (10) that is printed and/or printable by the intaglio gravure printing press.
6. Intaglio gravure printing press according to claim 1 or 2 or 3 or 4 or 5, characterized in that the at least one wiping device (05) is arranged along the direction of rotation of the at least one forme cylinder (03), downstream from the at least one inking unit (18) and/or ink collecting cylinder (12), and/or that the at least one wiping device (05) comprises at least one wiping cylinder.
7. Intaglio gravure printing press according to claim 1 or 3 or 4 or 5 or 6, characterized in that the at least one print head (04) is arranged at the at least one impression cylinder (01) along a transport path of at least one substrate (10), downstream from at least one printing nip between the at least one forme cylinder (03) and the at least one impression cylinder (01).
8. Intaglio gravure printing press according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7, characterized in that the intaglio gravure printing press comprises at least two print heads (04), at least one print head (04) being arranged at the at least one impression cylinder (01), and at least one print head (04) being arranged at the at least one forme cylinder (03).
9. Method for applying at least one printing fluid onto at least one substrate (10), at least one intaglio gravure printing press comprising at least one gravure printing unit comprising at least one forme cylinder (03) and at least one impression cylinder (01), the at least one forme cylinder (03) comprising at least one printing plate (02) including at least one engraving, at least one inking unit (18) and/or at least one ink collecting cylinder (12), including at least one assigned inking unit (18), inking the at least one engraving of the at least one forme cylinder (03) with at least one printing fluid embodied as ink, the at least one printing fluid embodied as ink being applied onto the at least one substrate (10), the intaglio gravure printing press comprising at least one print head (04), at least one printing fluid that is different from the printing fluid embodied as ink being indirectly or directly applied onto the at least one substrate (10) by means of the at least one print head (04), the at least one print head (04) directly applying its printing fluid onto the at least one substrate (10) at the at least one impression cylinder (01) along a transport path of the at least one substrate (10), downstream from at least one printing nip between the at least one forme cylinder (03) and the at least one impression cylinder (01), or the at least one print head (04) indirectly applying its printing fluid onto the at least one substrate (10) by means of the at least one forme cylinder (03) being inked by the at least one print head (04), and the at least one print head (04) inking the at least one engraving with the printing fluid of the at least one print head (04) prior to the at least one engraving being inked with the printing fluid that is embodied as ink.
10. Method according to claim 9, characterized in that the at least one print head (04) comprises the at least one printing fluid, which is configured to be transparent, and/or that the at least one printing fluid of the at least one print head (04) is embodied as varnish and/or as UV varnish, and/or that the at least one printing fluid of the at least one print head (04) forms at least one protective layer and/or at least one protective film on the at least one substrate (10), and/or that at least the printing fluid of the at least one print head (04) is dried along a transport path of the at least one substrate (10), downstream from the at least one forme cylinder (03) and/or upstream from at least one collecting position of the at least one substrate (10) of at least one delivery.
11. Method according to claim 9 or 10, characterized in that the at least one forme cylinder (03) is cleaned by at least one wiping device (05).
12. Method according to claim 11, characterized in that the at least one wiping device (05) comprises at least one wiping cylinder, and/or that the at least one wiping device (05) is arranged along the direction of rotation of the at least one forme cylinder (03), downstream from the at least one inking unit (18) and/or ink collecting cylinder (12) and/or downstream from the at least one print head (04), and/or that the at least one wiping device (05) is arranged along the direction of rotation of the at least one forme cylinder (03), upstream from a contact region of the at least one forme cylinder (03) with the at least one impression cylinder (01).
13. Method according to claim 9 or 10 or 11 or 12, characterized in that at least one substrate (10) printed and/or printable by the intaglio gravure printing press is embodied as a web or a sheet, and/or that the at least one substrate (10) comprises at least two multiple-up copies.
14. Method according to claim 9 or 10 or 11 or 12 or 13, characterized in that the intaglio gravure printing press comprises at least two print heads (04), at least one print head (04) being arranged at the at least one impression cylinder (01), and at least one print head (04) being arranged at the at least one forme cylinder (03).

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