DE102019114982B3 - Device for transport in a sheet processing machine with a conveyor belt - Google Patents

Abstract

The invention relates to a device for transport in a sheet processing machine with a conveyor belt having suction transport means for guiding at least one sheet through the sheet processing machine, wherein the one conveyor belt has at least one suction opening with a length and a width and at least one vacuum source via at least one suction line with at least one Vacuum chamber is connected and wherein the at least one vacuum chamber has at least one suction opening with a length in the transport direction and a width in the transverse direction.

Description

The invention relates to a device for transport in a sheet processing machine with a conveyor belt 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 get by without a fixed, i.e. physically immutable, 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 processes usually have at least one image-generating device, for example at least one print head. In the case of the inkjet printing process, such a print head is designed, for example, as an inkjet print head and has at least one and preferably several nozzles, by means of which at least one printing fluid, for example in the form of ink droplets, can be specifically transferred to a printing substrate. Alternative printing processes have solid printing forms, for example gravure printing processes, planographic printing processes, offset printing processes and letterpress printing processes, in particular flexographic printing processes. Depending on the number of copies and / or other requirements such as print quality, a non-impact printing process or a printing process with a fixed printing form may be preferred.

Sheet processing machines are known. However, conventional transport systems cannot always be used for particularly thick sheets.

Through the DE 10 2017 212 987 A1 a sheet processing machine with at least one non-impact coating unit with at least one suction transport means is known. The at least one suction transport means comprises a flexible transport belt and is connected to at least one vacuum source, for example a blower, by means of a suction line. The suction transport means comprises at least two adjacent vacuum chambers.

Through the DE 12 57 516 A a device for transport in a sheet processing machine with a suction transport means having a conveyor belt is known. The conveyor belt has at least one suction opening. At least one vacuum source is connected to at least one vacuum chamber via at least one suction line. The at least one vacuum chamber has at least one suction opening. Various valves are arranged on the suction lines.

Through the DE 696 19 347 T2 a device for transport in a sheet processing machine with a suction transport means is known. Several vacuum chambers are connected to a vacuum source by suction lines. The suction lines have various valves for pressure compensation.

Through the US 6 131 901 A as well as the EP 0 773 177 A2 a device for transport with a suction transport means having a conveyor belt is known. The conveyor belt has at least one suction opening. At least one vacuum source is connected to at least one vacuum chamber via at least one suction line. The at least one vacuum chamber has at least one suction opening. The width in the transverse direction of the suction opening is greater than the width of the at least one suction opening.

The invention is based on the object of creating a device for transport in a sheet processing machine with a conveyor belt.

The object is achieved according to the invention by the features of claim 1.

One advantage that can be achieved with the invention is a uniform transport of the sheet through the sheet processing machine. Depending on the arrangement of the suction openings on a conveyor belt in combination with the arrangement of the suction openings on the surface of the vacuum chamber facing the conveyor belt, vacuum fluctuations can be reduced during operation. In particular, very precise sheet transport is advantageous in digital printing.

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

• 1 eine schematische Darstellung einer Bogendruckmaschine;
• 2 eine schematische Darstellung eines Saugtransportmittels mit einem durch Umlenkwalzen und Stützelementen angetriebenes Transportband;
• 3a eine schematische Darstellung der Vorrichtung zum Transport zwischen zwei Saugkästen mit Vorrichtung zum Druckausgleich;
• 3b eine schematische Darstellung der Vorrichtung zum Transport zwischen zwei Saugkästen mit einer Vorrichtung zum Druckausgleich in einer bevorzugten Ausführungsform;
• 4a eine schematische Darstellung der Vorrichtung zum Transport von Bogen mit einem Saugtransportmittel und zwei angetriebenen Stützelementen in einer Unterdruckkammer;
• 4b eine schematische Darstellung der Vorrichtung zum Transport von Bogen mit einem Saugtransportmittel mit mehreren Stützelementen in einer Unterdruckkammer;
• 5 eine alternative Ausführungsform in einer vergrößerten Darstellung eines Ausschnittes der Vorrichtung zum Transport von Bogen mit einem Saugtransportmittel mit einer versetzten Anordnung von Ansaugöffnungen und Saugöffnungen.

Show it:

• 1 a schematic representation of a sheet-fed printing machine;
• 2 a schematic representation of a suction transport means with a conveyor belt driven by deflecting rollers and support elements;
• 3a a schematic representation of the device for transport between two suction boxes with device for pressure compensation;
• 3b a schematic representation of the device for transport between two suction boxes with a device for pressure compensation in a preferred embodiment;
• 4a a schematic representation of the device for transporting sheets with a suction transport means and two driven support elements in a vacuum chamber;
• 4b a schematic representation of the device for transporting sheets with a suction transport means with several support elements in a vacuum chamber;
• 5 an alternative embodiment in an enlarged view of a section of the device for transporting sheets with a suction transport means with an offset arrangement of suction openings and suction openings.

For the sake of simplicity, the term “printing ink” in the sense of a processing machine shall be used in the preceding and in the following - if not explicitly differentiated and named accordingly 01 , especially a printing press 01 liquid or at least flowable coloring fluids to be printed, which not only refer to the higher-viscosity coloring fluids for use in rotary printing machines, which are more colloquially associated with the term "printing ink", but in addition to these higher-viscosity coloring fluids in particular also low-viscosity coloring fluids such as "inks", especially inkjet inks, but also powdery coloring fluids such. B. toner, includes. In the foregoing and in the following, colorless lacquers are also meant when printing fluids and / or inks and / or printing inks are mentioned. Means for a pretreatment (so-called priming or precoating) of the printing material are also preferred above and below 02 meant 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 processing machine 01 is preferred as a printing machine 01 educated. The processing machine 01 is preferred as a sheet processing machine 01 trained, so as a processing machine 01 for machining of sheet-shaped substrates 02 or bow 02 , especially sheet-like printing material 02 . The processing machine 01 is further preferred as a corrugated cardboard sheet processing machine 01 trained, so as a processing machine 01 for machining of sheet-shaped substrates 02 or bow 02 made of corrugated cardboard 02 , especially sheet-like printing material 02 made of corrugated cardboard 02 . The processing machine is also preferred 01 as a sheet-fed printing machine 01 designed, in particular as a corrugated sheet printing machine 01 , so as a printing press 01 for coating and / or printing on sheet-shaped substrates 02 or bow 02 made of corrugated cardboard 02 , especially sheet-like printing material 02 made of corrugated cardboard 02 . For example, is the printing press 01 as a printing machine working according to a non-impact printing process 01 and / or as a printing machine operating according to a printing forme-related printing process 01 educated. The printing press is preferred 01 as a non-impact printing machine 01 , especially inkjet printing machine 01 and / or as a flexographic printing machine 01 educated. The printing press 01 has, for example, at least one as a flexo-coating unit 400 ; 600 ; 800 trained unit 400 ; 600 ; 800 on. Alternatively or additionally, the coating machine 01 preferably at least one as a non-impact coating unit 400 ; 600 ; 800 , especially jet coating unit 400 ; 600 ; 800 or ink jet coating unit 400 ; 600 ; 800 trained unit 400 ; 600 ; 800 on.

So far in the foregoing and in the following features based on an embodiment as a sheet processing machine 01 are described, they also apply to a general processing machine 01 , especially for a processing machine 01 for processing at least web-shaped substrates 02 is designed, so a roll processing machine 01 and / or web processing machine 01 , so as a processing machine 01 for processing of web-shaped substrates 02 or at least one web of material 02 , especially web-like printing material 02 , in particular regardless of whether it comes from a role or not, at least insofar as there are no contradictions. So much for the previous and the following from Bogen 02 The same applies to general substrates, in particular sheets or web-shaped substrates, at least insofar as no contradictions arise therefrom. A transport route for transporting substrate is preferred 02 , especially printing material 02 and / or arch 02 intended. The one for the transport of printing material 02 The intended transport path is in particular that spatial area that the printing material 02 in the event of his presence possibly at least temporarily takes and / or would take.

The processing machine 01 preferably has a transport device 100 trained unit 100 for the substrate 02 on. The transport device 100 is at least one as a substrate feeding device 100 trained, also sheet feeder 100 called aggregate 100 , especially sheet feeder unit 100 , which is further preferred as a module 100 , especially as a sheet feeder module 100 is trained.

The processing machine 01 preferably has at least one as a conditioning device 200 ; 550 trained unit 200 ; 550 , especially conditioning unit 200 ; 550 on, which is further preferred as a module 200 ; 550 , especially as a conditioning module 200 ; 550 is trained. Such a conditioning device 200 ; 550 is for example as a preparatory facility 200 or as an aftertreatment facility 550 educated. The processing machine 01 preferably has at least one as a preparatory device 200 trained unit 200 , especially the preparation unit 200 on, which is further preferred as a module 200 , especially as a preparatory module 200 is formed and a conditioning device 200 represents. The processing machine 01 preferably has at least one as an aftertreatment device 550 trained unit 550 , especially post-treatment unit 550 on, which is further preferred as a module 550 , especially as a post-treatment module 550 is formed and a conditioning device 550 represents.

The sheet-fed printing press is preferred 01 alternatively or additionally in that along the for the transport of substrate 02 , in particular, arcuate substrate 02 , especially printing material 02 and / or arch 02 intended transport route in front of the at least one unit 400 , e.g. B. Module 400 , especially primer module 400 and / or in front of the at least one unit 600 , e.g. B. Module 600 , especially non-impact printing module 600 at least one as a substrate supply device 100 trained module 100 is arranged. The sheet-fed printing press is preferred 01 alternatively or additionally in that along the for the transport of substrate 02 , especially printing material 02 and / or arch 02 provided transport path in front of the at least one primer module 400 and / or in front of the at least one non-impact pressure module 600 at least one cleaning device for substrate 02 , especially printing material 02 and / or arch 02 is arranged. In particular, it has at least one non-impact printing module 600 at least for example several printing assemblies 601 and / or several stand areas 602 on.

The processing machine 01 preferably has at least one as a drying device 500 trained unit 500 , especially drying unit 500 on, which is further preferred as a module 500 , especially as a drying module 500 is trained. The at least one drying module 500 is in particular a special form of a processing module 500 . In particular, the processing machine 01 for example an after-dryer assembly 502 on.

The processing machine 01 preferably has at least one as a device for transport 700 or means of transport 700 trained unit 700 , especially the transport unit 700 on, which is further preferred as a module 700 , especially as a transport module 700 is trained.

The processing machine 01 preferably has at least one as a painting facility 800 trained, also coating unit 800 called aggregate 800 , especially painting unit 800 on, which is further preferred as a module 800 , especially as a painting module 800 is trained. At least one aggregate 800 , e.g. B. Primer module 800 is in particular a special form of a processing module 800 .

The processing machine 01 preferably has at least one as a shaping device 900 and / or punching device 900 trained unit 900 , in particular shaping unit 900 and / or punching unit 900 on, which is further preferred as a module 900 , especially as a shaping module 900 and / or punching module 900 is trained. The at least one shaping module 900 and / or punching module 900 is in particular a special form of a processing module 900 .

The processing machine 01 preferably has at least one as a substrate dispensing device 1000 trained, also sheet delivery 1000 called aggregate 1000 , especially delivery unit 1000 on, which is further preferred as a module 1000 , especially as a display module 1000 is trained.

Alternatively or additionally, for example, there is at least one drying assembly 501 Part of at least one, preferably as a module 100 ; 200 ; 400 ; 500 ; 550 ; 600 ; 700 ; 800 ; 900 ; 1000 trained unit 100 ; 200 ; 400 ; 500 ; 550 ; 600 ; 700 ; 800 ; 900 ; 1000 .

Unless explicitly differentiated, the term sheet-shaped substrate is used here 02 , in particular of a printing material 02 , especially the bow 02 basically any substrate that is flat and in sections 02 , thus also substrates present in tabular or plate form 02 , so also panels or plates, be included. The so defined arcuate substrate 02 or the bow 02 is for example made of paper or cardboard, ie as a paper or cardboard sheet, or by sheet 02 , Panels or possibly plates made of plastic, cardboard, glass or metal. It is more preferably the substrate 02 about corrugated cardboard 02 , especially corrugated cardboard sheets 02 . Under the thickness of an arch 02 is preferably a dimension orthogonal to a largest area of the arc 02 to understand. This largest area is also known as the main area. The thickness of the arch 02 is for example at least 0.1 mm, more preferably at least 0.3 mm and even more preferably at least 0.5 mm. Especially with corrugated cardboard sheets 02 Significantly greater thicknesses are also common, for example at least 4 mm or even 10 mm and more. Corrugated cardboard sheet 02 are comparatively stable and therefore not very flexible. Corresponding adjustments to the processing machine 01 therefore facilitate the processing of sheets 02 great thickness.

The processing machine 01 preferably has several aggregates 100 ; 200 ; 400 ; 500 ; 550 ; 600 ; 700 ; 800 ; 900 ; 1000 on. Under an aggregate 100 ; 200 ; 400 ; 500 ; 550 ; 600 ; 700 ; 800 ; 900 ; 1000 is preferably to be understood in each case as a group of devices that functionally interact, in particular around a preferably self-contained processing operation of the substrate 02 , especially printing material 02 and / or arch 02 to be able to perform.

The particular for a transport of sheets 02 intended transport direction T is a direction T , which is preferably at least substantially and more preferably completely horizontally oriented and / or which is preferably from a first unit 100 ; 200 ; 400 ; 500 ; 550 ; 600 ; 700 ; 800 ; 900 the processing machine 01 to a final aggregate 200 ; 400 ; 500 ; 550 ; 600 ; 700 ; 800 ; 900 ; 1000 the processing machine 01 has, in particular of a sheet feeder unit 100 or a transport device 100 on the one hand to a delivery unit 1000 or a substrate dispenser 1000 on the other hand, and / or which preferably points in a direction in which the arc 02 is transported apart from vertical movements or vertical components of movements, in particular from a first contact with one of the transport device 100 downstream aggregate 200 ; 400 ; 500 ; 550 ; 600 ; 700 ; 800 ; 900 ; 1000 the processing machine 01 or first contact with the processing machine 01 up to a last contact with the processing machine 01 .

A working width of the processing machine 01 and / or the at least one non-impact coating unit 400 ; 600 ; 800 is preferably a dimension that is preferably orthogonal to the intended transport path of the sheet 02 through the at least one non-impact coating unit 400 ; 600 ; 800 extends, more preferably in a transverse direction A. . The cross direction A. is preferably a horizontal direction A. . The cross direction A. is orthogonal to the intended transport direction T the arc 02 and / or orthogonal to the intended transport path of the sheets 02 through the at least one non-impact coating unit 400 ; 600 ; 800 oriented. The working width of the processing machine 01 preferably corresponds to a maximum width that an arc 02 may have to still use the processing machine 01 to be able to be processed, so in particular a maximum with the printing machine 01 processable sheet width. Under the width of an arch 02 is in particular its dimension in the transverse direction A. to understand. This is preferred regardless of whether this width of the sheet 02 is larger or smaller than a horizontal dimension of the arch orthogonal thereto 02 who further prefers the length of this arc 02 represents. The substrate preferably has 02 , especially the bow 02 , a length, in particular a length of the at least one substrate 02 between 300 mm and 1,500 mm, more preferably between 700 mm and 1,300 mm. The working width of the processing machine 01 preferably corresponds to the working width of the at least one non-impact coating unit 400 ; 600 ; 800 , especially printing unit 600 . The working width of the sheet processing machine 01 is preferably at least 100 cm, more preferably at least 150 cm, even more preferably at least 160 cm, even more preferably at least 200 cm and even more preferably at least 250 cm.

A processing machine 01 , in particular a sheet processing machine 01 preferably has at least one as a device for transport 700 or means of transport 700 trained unit 700 with a conveyor belt 726 having Sautransportmittel 718 on. The suction means of transport 718 serves to guide at least one arcuate substrate 02 , especially a bow 02 through the sheet processing machine 01 .

Under a suction vehicle 718 is therefore preferably to be understood as a device which has at least one movable transport surface, which in particular serves as a counter-pressure surface and, for example, at least partially at least in the transport direction T is movable. Furthermore, the suction transport means 718 at least one vacuum chamber 719 on that by means of a suction line 721 with at least one vacuum source 733 connected is. The source of negative pressure 733 has a fan, for example 733 on. The at least one vacuum chamber 719 has at least one suction opening 722 on that one sucking the bow 02 serves. Depending on the embodiment of the suction transport means 718 and size of the arch 02 become the arch 02 while in one the at least one suction opening 722 closing layer sucked or just sucked against a counterpressure surface in such a way that ambient air is still on the sheet 02 over into the suction opening 722 can arrive. For example, the transport surface has one or more suction openings 723 on. The suction openings 723 are preferably used to create a negative pressure from the suction opening 722 the vacuum chamber 719 to convey further up to the transport surface, in particular without pressure losses or with very low pressure losses. The suction opening acts as an alternative or in addition 722 so on the arch 02 that these against the transport surface is sucked without opening the transport surface 723 would exhibit. For example, there is at least one deflection means 724 arranged, which directly or indirectly ensures a circumferential movement of the at least one transport surface. This is preferably at least one deflection means 724 and / or the transport surface itself is driven and / or drivable, in particular to move the sheets 02 to care.

A first embodiment of a suction transport means 718 is to be understood as a device that has at least one flexible conveyor belt 726 has, which serves as a transport surface. At least one conveyor belt 726 is preferred by as pulleys 724 and / or deflection rollers 724 trained deflection means 724 deflected and / or is preferably self-contained, so that endless circulation is made possible. At least one conveyor belt 726 preferably has a multiplicity of suction openings 723 on. At least one conveyor belt 726 preferably covers the at least one suction opening in at least a section of its circulation path 722 the at least one vacuum chamber 719 . The vacuum chamber is further preferred 719 then only through the suction openings 723 of the at least one conveyor belt 726 with an environment and / or with arch 02 connected. Support means are preferably arranged which prevent the at least one conveyor belt from being 726 too far or at all into the vacuum chamber 719 is pulled and / or that ensure that the transport surface assumes a desired shape, for example such that it is at least in the area in which its suction openings 723 with the vacuum chamber 719 are connected, forms a flat surface. Through a rotating movement of the at least one conveyor belt 726 This then results in a forward movement of the transport surface, with sheets 02 are held securely on the transport surface exactly in the area in which they are held by the at least one conveyor belt 726 with the exception of the suction openings 723 covered suction opening 722 opposite.

Preferred are along the for arches 02 provided transport path at least two, more preferably at least three, even more preferably at least five and even more preferably at least ten, in particular with regard to the transport direction T separate and / or separable vacuum chambers 719 arranged one behind the other, each having at least one suction opening 722 exhibit. Such a separation is to be understood in particular as a fluidic separation. This separation is preferably complete, in particular such that a connection is via with a vacuum source 733 connected lines and / or through the suction openings 723 of the conveyor belt 726 and an ambient atmosphere is present. This covers at least one conveyor belt 726 in its transport section of its circulation path, preferably at least one suction opening in each case 722 several and more preferably all of these vacuum chambers arranged one behind the other 719 at least partially, in particular except for the respective suction openings 723 . That means that a respective conveyor belt 726 several vacuum chambers 719 are assigned in the transport direction T affect different areas one after the other. In particular, this is to be distinguished from an arrangement of several conveyor belts arranged at least partially one behind the other. The negative pressure is essentially only through those suction openings 723 further conveyed in connection with the respective vacuum chamber 719 stand. In contrast to a large vacuum chamber 719 can have several small vacuum chambers 719 therefore act individually and in particular are at least partially closed individually to an environment. This closure takes place on the one hand by the conveyor belt 726 itself and, on the other hand, by those constituents of bow 02 , the corresponding suction openings 723 cover. If the proportion of suction openings is too small 723 is covered, the negative pressure is reduced by the incoming ambient air. This could cause the arches 02 can no longer be held adequately. This danger exists with small arches 02 and / or large spaces between sheets 02 and / or a first sheet 02 and / or a final sheet 02 . By dividing it into several vacuum chambers 719 Along the transport section it is ensured that the negative pressure cannot decrease sharply at the same time in all areas. Furthermore, through the majority of the vacuum chambers 719 with the same length of the conveyor belt 726 for smaller vacuum chambers 719 taken care of. This has the consequence that every suction opening 723 a larger proportion of a total number of the respective vacuum chamber 719 just assigned suction openings 723 Has. Therefore, a relatively small number of closed suction openings is sufficient 723 to adjust the negative pressure in the respective negative pressure chamber 719 at a usable level. This relatively small number can also be achieved with small arches 02 and / or large spaces between sheets 02 and / or a first sheet 02 and / or a final sheet 02 to reach. Furthermore, it is not relevant whether in a vacuum chamber 719 the vacuum is too low as long as there is an arc 02 , which is partly in their area of influence, nor by the negative pressure of another negative pressure chamber 719 is held. This is also due to the relatively large number of relatively small vacuum chambers 719 reached. This effect can also be used deliberately to target only the relevant vacuum chambers 719 to ensure a negative pressure and not adequately covered Vacuum chambers 719 deliberately at least temporarily separated from a corresponding negative pressure source.

The individual vacuum chambers are preferred 719 individually pressurized. In an alternative or additional development, the is preferably characterized as a sheet-fed printing machine 01 trained processing machine 01 therefore preferably characterized in that at least a first of these at least two successively arranged vacuum chambers 719 via at least one in particular first suction line 721 with at least one first vacuum source 733 connected and / or arranged to be connectable. Furthermore, at least one other, in particular second, of these at least two vacuum chambers arranged one behind the other is preferred 719 via at least one suction line 721 , in particular another and / or second suction line 721 with at least or exactly one other, in particular second, vacuum source 733 connected and / or arranged connectable. More preferably, this is at least one other of these at least two vacuum chambers arranged one behind the other 719 via the at least one suction line 721 exclusively with the at least one other, in particular second, vacuum source 733 connected and / or arranged connectable. The designation as the first or second vacuum chamber 719 , first or second suction line 721 or first or second vacuum source 733 etc. only serves to distinguish between them and does not affect a sequence or arrangement of these components.

In an alternative or additional development, the is preferably characterized as a sheet-fed printing machine 01 trained processing machine 01 preferably characterized in that at least a first of these at least two vacuum chambers arranged one behind the other 719 via at least one in particular first suction line 721 and at least one first controllable and / or regulatable valve 737 with at least one first vacuum source 733 connected and / or arranged to be connectable. Then the vacuum source must 733 not or not completely deactivated to a corresponding vacuum chamber 719 to deactivate. Instead, a corresponding activation of the at least one valve is sufficient 737 . In an alternative or additional development, the is preferably characterized as a sheet-fed printing machine 01 trained processing machine 01 preferably characterized in that at least a second of these at least two vacuum chambers arranged one behind the other 719 via at least one, in particular, second suction line 721 and at least one second controllable and / or regulatable valve 737 with the at least one first vacuum source 733 connected and / or arranged to be connectable. Then a vacuum source can be used 733 for several vacuum chambers 719 are used and the outlay on equipment is kept as low as possible.

When the suction openings 722 the at least one vacuum chamber 719 of at least one arch 02 are at least partially covered, in particular are covered to a greater extent than the suction openings 722 of the adjacent vacuum chambers 719 , pressure differences form between the adjacent vacuum chambers 719 out. In particular, the pressure falls to a minimum and the negative pressure rises to a maximum when the at least one sheet 02 the suction openings 722 the respective vacuum chamber 719 , for example completely, covered. In the case of a smaller arch area than that of the arch 02 facing surface 709 the vacuum chamber 719 , the case of the pressure drop to a minimum occurs when the at least one arc is located 02 completely above the respective vacuum chamber 719 is located. In particular, a pressure difference is created between two adjacent vacuum chambers 719 out.

The sheet processing machine 01 with the suction transport 718 for guiding the at least one sheet 02 through the sheet processing machine 01 with at least one vacuum source 733 therefore has the device for transport 700 with at least one pressure equalization line 703 on. In particular, the at least one vacuum source is 733 at least via the suction line 721 with the at least one vacuum chamber 719 connected. The at least one vacuum chamber 719 has in particular the suction openings 722 for sucking in the at least one sheet 02 on. With pressure equalization, the adjustment of the pressure of the two adjacent vacuum chambers was preceded and subsequently followed 719 Meant to be the same or a similar pressure level. In particular, the negative pressure is in normal operation, in particular without an arc 02 the suction openings 722 covered, between 8 mbar (eight millibars) and 25 mbar (twenty-five millibars). In the operating state where a bow 02 the suction openings 722 covered, especially when the suction openings are fully covered 722 through an arch 02 , the maximum negative pressure increases to 25 mbar (twenty-five millibars) to 60 mbar (sixty millibars), in particular to 40 mbar (forty millibars), compared to atmospheric pressure. The pressure equalization reduces the pressure differences. In particular, the relative deviation of the negative pressures of the two adjacent negative pressure chambers should be 719 , after pressure equalization, be less than 100%, preferably less than 50%, more preferably less than 30%.

For pressure equalization, the device for transport 700 at least one Pressure equalization line 703 on. At least two vacuum chambers 719 are through at least one pressure equalization line 703 connected and the at least one pressure equalization line 703 has at least one valve 702 to equalize pressure. If more than two, they preferably have pressure equalization lines 703 , connected vacuum chambers 719 always between two vacuum chambers 719 at least one valve 702 to equalize pressure.

In one embodiment, the device for transport 700 a controllable and / or adjustable valve 702 to equalize pressure. The valve is preferred 702 controllable and / or regulatable for pressure equalization, depending on the pressure difference in the at least the respective adjacent vacuum chambers 719 , with at least one pressure sensor 705 designed. In particular, the valve is 702 Arranged open when the relative deviation of the negative pressures of the two adjacent negative pressure chambers 719 is greater than 100%, preferably greater than 50%, more preferably greater than 30%.

At least one of the at least two vacuum chambers is preferred 719 at least one pressure sensor 705 arranged. It is further preferred at least in each vacuum chamber 719 at least one pressure sensor 705 appropriate. The at least one pressure sensor 705 is in particular arranged so that the at least one valve 702 as a function of the signal of the at least one pressure sensor 705 is arranged regulated and / or controlled. In a preferred embodiment, this is at least one valve 702 controllable and / or regulatable with at least one drive for pressure compensation 704 educated. The at least one drive is preferred 704 with at least one pressure sensor 705 arranged coupled.

That at least one pressure compensation valve 702 is in a further embodiment as a check valve 702 educated. At least one as a check valve 702 trained pressure equalization valve 702 is open in the event of pressure differences. In particular in the event of a relative deviation in the negative pressures of the two negative pressure chambers lying next to one another 719 of more than 100%, preferably more than 50%, more preferably more than 30%, arranged open.

The device preferably has for transport 700 at least two valves 702 for pressure equalization between two adjacent vacuum chambers 719 on. The at least two valves are preferred 702 are arranged in parallel for pressure equalization.

Additionally or alternatively, this is at least one valve 702 for pressure compensation depending on the position and / or the at least one arc 02 controlled and / or regulated arranged. In particular, in this embodiment, a precontrol and / or precontrol is possible before pressure fluctuations occur. In particular, a faster pressure equalization of the system is thereby possible.

The invention also relates to a method for transport in a sheet processing machine 01 with a conveyor belt 726 having suction transport means 718 for guiding at least one arch 02 through the sheet processing machine 01 . The at least one vacuum source 733 is via the at least one suction line 721 with at least one vacuum chamber 719 connected and the at least one vacuum chamber 719 has suction openings 722 for sucking and holding the at least one sheet 02 on. At least one valve 702 for pressure equalization is at least one pressure equalization line 703 between the at least two vacuum chambers 719 arranged. This becomes at least one valve for pressure equalization 702 between the at least two vacuum chambers 719 open.

At least one valve 702 the signal from the at least one pressure sensor is used for pressure compensation 705 regulated and / or controlled. Each vacuum chamber preferably has 719 at least one pressure sensor 705 on. At least one valve 702 the signals from the at least one pressure sensor are used for pressure compensation 705 controlled and / or regulated. For this purpose, the signal is used to control and / or regulate the at least one valve 702 for pressure equalization on at least one drive 704 transmitted and for regulating and controlling the at least one valve 702 utilized. In particular, this will be at least one valve 702 so controlled and / or regulated that the relative deviation of the negative pressures of adjacent vacuum chambers 719 is less than 100%, preferably less than 50% and more preferably less than 30%.

Additionally or alternatively, the position of the bow 02 used to the pressure equalizing valve 702 to control and / or regulate. The at least one bow 02 is of at least a first vacuum chamber 719 in transport direction T towards a second vacuum chamber 719 by the suction transport means 718 emotional. The pressure equalization preferably takes place during the at least one arc 02 most of the intake openings 722 on the surface of the at least one first vacuum chamber 719 covered. With a bow 02 whose area is smaller than the surface of the at least one vacuum chamber 719 is, the pressure equalization takes place preferably when the at least one sheet 02 completely above the respective vacuum chamber 719 is. With a bow 02 whose Area is the area of the respective vacuum chamber 719 exceeds, the pressure equalization takes place preferably when the at least one sheet 02 the surface of the at least one respective vacuum chamber 719 locks.

Additionally or alternatively, the speed signal of the sheet 02 and / or the speed signal of the sheet processing machine 01 used by means of the at least one drive 704 the valve 702 to control and / or regulate for pressure equalization.

At least two valves are preferred 702 for pressure equalization in parallel in the area of the pressure equalization line 703 between two vacuum chambers 719 used for pressure equalization in both directions. In a preferred embodiment, this becomes at least one first valve 702 closed and at least one second valve 702 open to equalize pressure when there is at least one arch 02 for the most part over the suction openings in the direction of transport T downstream a second vacuum chamber 719 is located.

Additionally or alternatively, the device for transport 700 in one preferably as an inkjet printing machine 01 trained sheet processing machine 01 with a conveyor belt 726 for guiding at least one arch 02 through the sheet processing machine 01 a suction transport means 718 on. The suction means of transport 718 has at least one immediately below the conveyor belt 726 arranged vacuum chamber 719 and at least one deflection roller 724 on. The at least one deflection roller is preferred 724 with at least one drive 727 arranged driven. The at least one vacuum chamber 719 has at least one, preferably two, more preferably five, through at least one further drive 710 driven support element 706 and / or support elements 706 on. The at least one support element 706 , preferably the at least two support elements 706 , more preferably the at least five support elements 706 , are with the at least one conveyor belt 726 arranged in direct contact. In particular, this is at least one support element 706 the conveyor belt 726 arranged driving.

In a preferred embodiment, the at least five are support elements 706 arranged so that the at least five support elements 706 over the entire width of the at least one vacuum chamber 719 are arranged distributed. As width B719 the at least one vacuum chamber 719 is in particular the extent of the conveyor belt 726 facing edge of the respective vacuum chamber 719 in the direction of transport T to understand. In particular, so many support elements are preferred 706 arranged that the entire width B719 the at least one vacuum chamber 719 with support elements 706 is filled out.

If at least two support elements 706 are present, are preferably at least two support elements 706 via a common connecting element 711 with at least one other drive 710 connected arranged. All support elements are preferred 706 the respective vacuum chamber 719 via a common additional drive 710 arranged driven. In another embodiment, only some support elements 706 via at least one drive 710 driven jointly or independently. In particular, the distance is in the transport direction T between the at least two support elements 706 , in particular the distance between the axis of rotation of the at least two support elements 706 , the at least one vacuum chamber 719 less than 40 cm, preferably less than 20 cm, more preferably less than 10 cm. Overall, each support element is 706 the at least one vacuum chamber 719 arranged so that rubbing surfaces, like those of the conveyor belt 726 facing surface 709 the at least one vacuum chamber 719 , and the driving surface, such as the at least one support element 706 in transport direction T on the sheet transporting section of the conveyor belt 726 , not more than 50 cm, preferably not more than 20 cm, are arranged away from one another.

In a preferred embodiment, each driven support element has 706 at least across the working width in the transverse direction A. the respective vacuum chamber 719 at least one support segment 707 , preferably at least three support segments 707 , more preferably at least five support segments 707 , on. In particular, the formulation includes any support element 706 also one or more support elements 706 . Each support segment is preferred 707 designed as a role in particular a cylindrical role. At least 30%, preferably at least 50%, more preferably at least 70% over the working width in the transverse direction are preferred A. with the at least one support segment 706 covered. Every support segment 706 is of the at least one housing of the at least one vacuum chamber 719 arranged spaced. In particular, the distance between the lateral surface of the at least one support segment is here 706 and the at least one housing of the at least one vacuum chamber 719 less than 5 cm, more preferably less than 3 cm, more preferably less than 1 cm. As the housing of the at least one vacuum chamber 719 is preferably to understand the material that the at least one vacuum chamber 719 surrounds. If at least two support elements 706 are present, the support segments are 707 of at least two Support elements 706 preferably in the transverse direction A. Staggered across the working width.

Additionally or alternatively, the at least one vacuum chamber has 719 next to the at least one segment opening 708 several suction openings 722 on the conveyor belt 726 and the surface facing the side to be printed 709 the at least one vacuum chamber 719 on.

In a preferred embodiment, the at least one printhead assembly is 601 in a vertical direction V above the suction conveyor 718 arranged. Preceded by hereinafter denotes a vertical direction V , a direction which is preferably orthogonal to the plane passing through the transverse direction A. and transport direction T is stretched. Preferably form the vertical direction V with the transverse direction A. and the direction of transport T a Cartesian coordinate system. In particular, shows the direction V preferably from the floor on which the sheet processing machine 01 stands, away. With over the suction means of transport 718 is thus in particular a greater distance from the bottom of the sheet processing machine 01 meant. Furthermore, the at least one printhead assembly is 601 preferably perpendicular to the arch 02 and the conveyor belt 726 aligned.

The invention also relates to a method for transport in a sheet processing machine 01 with a conveyor belt 726 having suction transport means 718 for guiding at least one arch 02 through the sheet processing machine 01 , wherein the suction transport means 718 at least one immediately below the conveyor belt 726 arranged vacuum chamber 719 and at least one deflection roller 724 having. The at least one guide roller 724 comes with at least one drive 710 driven. At least one conveyor belt 726 is in the area of a vacuum chamber 719 additionally through under the conveyor belt 726 arranged at least two in the transport direction T mutually offset support elements 706 by at least one further drive 710 driven.

In a preferred embodiment, this is at least one conveyor belt 726 by the at least two support elements 706 that crosswise A. At least one support segment over the working width 707 have driven. The bows are preferred 02 from above by means of the at least one printhead assembly 601 printed.

On the side to be printed and on the conveyor belt 726 facing surface 709 the at least one vacuum chamber 719 is created by a distance between the at least one support segment 707 of the at least one housing of the at least one vacuum chamber 719 at least one segment opening 708 . Air is sucked in through this distance. In addition to the at least one segment opening 708 is preferred through at least one suction opening 722 on the side to be printed and the conveyor belt 726 facing surface 709 the at least one vacuum chamber 719 Air sucked in. In particular, this is the area of the at least one vacuum chamber 719 meant on the the conveyor belt 726 in operation.

The device also has 700 in a sheet processing machine 01 with a conveyor belt 726 having suction transport means 718 for guiding at least one arch 02 through the sheet processing machine 01 the conveyor belt 726 with the at least one suction opening 723 with at least one length L723 in transport direction T and a width B723 in the transverse direction A. on. The at least one vacuum chamber 719 has the at least one suction opening 722 with a length L722 in transport direction T and a width B722 in the transverse direction A. on.

The at least one suction opening is preferred 723 with a circular cross-section with a diameter D723 educated. In this case the length equals L723 and the width B723 the diameter D723 the at least one suction opening 723 . Several suction openings are preferred 723 on the at least one conveyor belt 726 arranged. The suction openings are preferred 723 in the transverse direction A. and in the direction of transport T arranged offset to one another. In particular, form the suction openings 723 which are on a straight line through the centroid of the suction openings 723 and orthogonal to the transverse direction A. and in the direction of transport T are arranged offset, a number of suction openings 723 .

Next are on the conveyor belt 726 facing surface 709 the at least one vacuum chamber 719 at least one suction opening 722 , preferably several suction openings 722 , arranged. The suction openings 722 have a length L722 , preferably parallel to the transport direction T and a width B722 , preferably parallel to the transverse direction A. , on. The at least one suction opening is preferred 722 The plurality of suction openings are preferred 722 , formed with a rectangular cross section. In particular, the suction openings 722 a greater length L722 than a width B722 on. The suction openings are also preferred 722 across the transverse direction A. and the direction of transport T arranged offset to one another. In particular, the suction openings form 722 which are on a straight line through the centroids and orthogonal to the transverse direction A. and in the direction of transport T are arranged offset, a row of suction openings 722 .

The rows of suction openings are preferably located 723 and the suction openings 722 on a common straight line through the centroids and orthogonal to the transverse direction A. and the suction openings are preferred 723 above the suction openings 722 in the vertical direction V arranged. The diameter is preferred D723 and / or the width B723 the at least one suction opening 723 at least larger, more preferably at least twice as large as the diameter D723 and / or the width B722 the at least one suction opening 722 . For example, it has at least one suction opening 723 a width B723 and / or a diameter D723 of 10 mm and the at least one suction opening 722 a width B722 of 2 mm.

The length L722 the at least one suction opening 722 on the conveyor belt 726 facing surface 709 corresponds to a distance A723 the at least one suction opening 723 to the next suction opening 723 in a series of suction openings 723 . In particular, here is as a distance A723 the distance between the centroids of two suction openings 723 meant. Alternatively, the length corresponds to 722 the at least one suction opening 722 a multiple of the distance A723 .

In a row of suction openings 722 arises between two adjacent and adjacent suction openings 722 a distance from the outer edge of the suction openings 722 . In the following and in the foregoing, this distance is referred to as the web 728 designated. In particular, the length L728 at least one bridge 728 between two adjacent suction openings 722 smaller than the length 723 and / or the diameter D723 the at least one suction opening 723 .

In a row of suction openings 722 forms between the outermost suction opening 722 a row and the edge of the respective vacuum chamber 719 at least one bridge 728 with a length L728 the length of the webs 728 may differ within a row. This bridge 728 has a length L728 that is half the length L723 or alternatively less than half the length L723 the at least one suction opening 722 corresponds to.

Between two rows of suction openings 723 is an offset V723 preferably less than the diameter D723 and / or the length L723 at least one suction opening 723 . In particular, an offset of the distance parallel to a direction from a centroid of a suction opening has been carried out above and below 723 and / or suction opening 722 to the related suction opening 723 and / or suction opening 722 . The offset is preferred V723 in transport direction T between two suction openings 723 two adjacent rows of suction openings 723 less than the diameter D723 and / or the length L723 at least one suction opening 723 . For example, a distance is A723 , measured from a center of area of an intake opening 723 to the other, in the direction of transport T between adjacent and adjacent suction openings 723 40 mm. The diameter D723 and / or the length L723 the at least one suction opening 723 is for example 10 mm. The offset V723 between two adjacent rows of suction openings 723 in the transverse direction A. is, for example, 15 mm, preferably 20 mm. In the direction of transport T is the offset V723 between two adjacent rows of suction openings 723 for example 15 mm. In this example there is therefore 8 rows of suction openings 723 a repetition of the arrangement of the suction openings 723 . The offset of the suction openings 722 remains the same for every 8 rows in this example and is then larger than the diameter every 8 rows D723 at least one suction opening 723 .

As long as there is no contradiction, there is at least one suction opening 722 and the at least one suction port 723 arranged as previously described. In one embodiment, the at least one vacuum chamber has 719 at least two support elements 706 on. Especially with several support elements 706 , especially more than 5 support elements 706 , are not suction openings 722 on the at least one vacuum chamber 719 available.

List of reference symbols

01

Processing machine, printing machine, sheet processing machine, corrugated cardboard sheet processing machine, sheet-fed printing machine, corrugated cardboard sheet printing machine, non-impact printing machine, inkjet printing machine, flexographic printing machine, coating machine, roll processing machine, web processing machine

02

Substrate, sheet, sheet, printing material, corrugated cardboard, material web, corrugated cardboard sheet

100

Unit, transport device, substrate supply device, sheet feeder, sheet feeder unit, module, sheet feeder module

200

Unit, conditioning unit, conditioning unit, module, conditioning module, preparation unit, preparation unit, preparation module

400

Unit, flexo coating unit, non-impact coating unit, jet coating unit, Inkjet coating unit, module, primer module

500

Unit, drying device, drying unit, module, drying module, processing module

501

Dryer assembly

502

Post dryer assembly

550

Unit, conditioning device, conditioning unit, module, conditioning module, post-treatment device, post-treatment unit, post-treatment module

600

Unit, flexo coating unit, non-impact coating unit, jet coating unit, ink-jet coating unit, module, non-impact printing module, printing unit

601

Printhead assembly

602

Stand space

700

Unit, device for transport, means of transport, transport unit, module, transport module

701

-

702

Valve, check valve

703

Pressure equalization line

704

Drive ( 702 )

705

Pressure sensor

706

Support element

707

Support segment

708

Segment opening

709

Surface, conveyor belt facing ( 719 )

710

Drive, further (706)

711

Connecting element

712

-

713

-

714

-

715

-

716

-

717

-

718

Suction transport

719

Vacuum chamber

720

-

721

Suction line

722

Suction opening ( 719 )

723

Suction opening ( 726 )

724

Deflection means, deflection roller, deflection roller

725

-

726

Conveyor belt

727

Drive ( 724 )

728

Bridge ( 722 )

729

-

730

-

731

-

732

-

733

Vacuum source, fan

734

-

735

-

736

-

737

Valve

800

Unit, flexo coating unit, non-impact coating unit, jet coating unit, inkjet coating module, painting device, coating unit, painting unit, module, painting module, priming module, processing module

900

Unit, shaping device, punching device, shaping unit, punching unit, module, shaping module, punching module, processing module

1000

Unit, substrate delivery device, sheet delivery, delivery unit, module, delivery module

A.

Cross direction, direction

T

Transport direction, direction

V

Direction, vertical

A723

Distance between adjacent suction openings ( 723 )

B719

Width ( 719 )

B722

Width ( 722 )

B723

Width ( 723 )

D723

Diameter ( 723 )

L722

Length ( 722 )

L723

Length ( 723 )

L728

Length ( 728 )

V723

Offset of two adjacent rows ( 723 )

Claims (6)

Device for transport (700) in a sheet processing machine (01) with a conveyor belt (726) having suction transport means (718) for guiding at least one sheet (02) through the sheet processing machine (01), wherein the one conveyor belt (726) has at least one suction opening (723 ) with a length (L723) in the transport direction (T) and a width (B723) in the transverse direction (A) and wherein at least one vacuum source (733) is connected via at least one suction line (721) to at least one vacuum chamber (719) and wherein the at least one vacuum chamber (719) has at least one suction opening (722) with a length (L722) in the transport direction (T) and a width (B722) in the transverse direction (A), the width (B723) of the at least one suction opening (723) is greater than the width (B722) of the at least one suction opening (722), characterized in that the length (L722) of the at least one suction opening (722) on the surface (709 ) corresponds to the distance (A723) of the at least one suction opening (723) to the next suction opening (723) of a row of suction openings (723). Device according to Claim 1 , characterized in that a web (728) is created between two adjacent suction openings (722) and that the length (L728) of the web (728) is smaller than the length (L723) and / or the diameter (D723) of the at least one suction opening ( 723) is. Device according to Claim 1 or 2 , characterized in that several of the suction openings (722) in the transport direction (T), which lie on a straight line through the centroids and orthogonal to the transverse direction (A) and are offset in the transport direction (T), form a row of suction openings (722) and that between the respective outermost suction openings (722) a web (728) is created between the edge of the respective vacuum chamber (719) and that the web (728) between the suction openings (722) has a length (L728) which is half the length ( L722) or less than half the length (L722) which corresponds to at least one suction opening (722). Device according to Claim 1 or 2 or 3 , characterized in that an offset (V723) between two adjacent rows of suction openings (723) is smaller than a length (L723) of at least one suction opening (723). Device according to Claim 1 or 2 or 3 or 4th , characterized in that the at least one vacuum chamber (719) has at least two support elements (706) Device according to Claim 1 or 2 or 3 or 4th or 5 , characterized in that the device for transport (700) has at least one pressure equalization line (703) and that in each case at least two vacuum chambers (719) are connected by at least one pressure equalization line (703) and that the at least one pressure equalization line (703) has at least one pressure equalizing valve (702).

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