Sheet-fed printing machine with suction belt and covering device

Abstract

Sheet-fed printing press (01), wherein the sheet-fed printing press (01) has at least one inkjet printing unit (600) with at least one inkjet print head (616), by which at least one first application point (618) of the inkjet printing unit (600) is defined, and wherein the at least one inkjet printing unit (600) has at least one transport means (611) for sheets (02) designed as a suction belt (611), which extends along a transport path provided for transporting sheets (02) beneath the at least one first application point (618) of the inkjet printing unit (600), and wherein the at least one transport means (611) has at least one flexible transport belt (726) which forms a transport surface (718) movable in a transport direction (T) and has a plurality of suction openings (723), and wherein the at least one transport means (611) has at least one vacuum chamber (719),which has at least one support plate (727) with a plurality of suction openings (722) and wherein the at least one flexible conveyor belt (726) is arranged to rest slidably on the at least one support plate (727) in such a way that the suction openings (723) can be at least partially brought into alignment with the suction openings (722) by a movement of the at least one flexible conveyor belt (726) in the transport direction (T), and wherein a transverse direction (A) is a horizontal direction (A),which is oriented orthogonally to the transport direction (T) and wherein the transport means (611) has at least one cover device (728) movable in and / or counter to the transverse direction (A), and wherein the at least one support plate (727) is arranged between the at least one cover device (728) and the flexible conveyor belt (726), and wherein the at least one cover device (728) has a plurality of control openings (729), and wherein the control openings (729) can be at least partially brought into alignment with the suction openings (722) by a movement of the at least one cover device (728) in and / or counter to the transverse direction (A), characterized in that the control openings (729) are each designed as rectilinear slots (729),which extend in a control direction (S) and which have two parallel straight boundaries and which are at least four times as long as they are wide, and that the control direction (S) runs parallel to these straight boundaries, and that the control direction (S) is a horizontal direction (S) which encloses a control angle (w) with the transverse direction (A), and that the control angle (w) is greater than 1° and less than 90°.

Description

[0001] The invention relates to a sheet-fed printing machine with a suction belt according to the preamble of claim 1.

[0002] Inkjet printing presses sometimes use suction belts to transport sheets. For example, in digital corrugated board printing, the sheets are held on a conveyor belt by a vacuum. If this is also the case in the area around the print heads, harmful air currents can develop under the print heads, negatively affecting the trajectory of the ink droplets, particularly if there is a gap between two consecutive sheets. The vacuum in the suction box creates an air current in this gap. If this gap is partially located under a print head, the air is also sucked in between the sheet and the print head. This leads to harmful air currents that can negatively affect the print quality at the beginning and end of the sheet.

[0003] DE 10 2017 212 983 A1 describes a sheet-fed printing machine with an inkjet print head and suction belt in the printing unit.

[0004] JP 2011-131 548 A discloses a sheet-fed printing machine with at least one inkjet print head and a suction belt, wherein cover devices movable in a transverse direction are arranged to cover holes in the suction belt that lie outside the width of the sheets to be processed, so that unnecessary air does not have to be sucked out and even narrow sheets can still be fixed.

[0005] US 2011 / 0 157 288 A1 discloses a device that can temporarily cover part of a suction belt to bridge an area between successive sheets. For this purpose, a covering device is arranged that can be moved in the transport direction of the sheets and thus placed over corresponding openings to cover them.

[0006] A device is also known in which the holes in a vacuum box are sealed. A complete seal prevents the sheet from being sucked down in that area. This can be critical at the leading and trailing edges of the sheet, as these can damage the print heads if they are lifted off.

[0007] The invention is based on the object of creating a sheet-fed printing machine with a suction belt.

[0008] The object is achieved according to the invention by the features of claim 1.

[0009] The advantages that can be achieved with the invention are, in particular, that a vacuum only acts in the area of ​​the sheet and that harmful air currents do not occur in the sheet gap as far as possible.

[0010] The geometry of a capping device can be selected so that it can be closed or opened in a fluid process by lateral displacement of this capping device in the area of ​​the print heads from front to back. In the middle of the sheet, it is possible to restore the original position. If information about the length of the sheets, the length of the gaps between them, and the position of the sheets along the transport path is known in the sheet-fed printing press, it is possible to generate a signal to control the lateral displacement.

[0011] A further advantage is that it makes it possible to increase the negative pressure in the suction boxes, thus reducing the number of sheets that are rejected due to raised edges. This is possible because the increased negative pressure has no negative effects in the area of ​​the sheet gap.

[0012] Embodiments of the invention are illustrated in the drawings and are described in more detail below.

[0013] They show: Fig. 1 a schematic representation of an exemplary sheet-fed printing press with a transport means designed as a suction belt and print heads aligned thereon; Fig. 2 a schematic representation of a transport means designed as a suction belt with print heads aligned thereon; Fig. 3 a schematic representation of a transport means designed as a suction belt; Fig. 4 a schematic representation of a relative position of conveyor belt, support plate and covering device; Fig. 5 is a schematic representation of part of a support plate; Fig. 6 a schematic representation of part of a covering device; Fig. 7 a schematic representation of a cover device and a support plate from below in a first relative position; Fig. 8 a schematic representation of a cover device and a support plate from below in a second relative position; Fig. 9 a schematic representation of a cover device and a support plate from below in a third relative position; Fig. 10 a schematic representation of a cover device and a support plate from below in a fourth relative position.

[0014] A sheet-fed printing press 01 is preferably designed as a corrugated board sheet-fed printing press 01, i.e., as a printing press 01 for coating and / or printing sheet-shaped substrate 02 or sheets 02 made of corrugated board, in particular sheet-shaped printing material 02 made of corrugated board. The printing press 01 is designed as a printing press 01 operating according to a non-impact printing process. The printing press 01 is preferably designed as a non-impact printing press 01, in particular an inkjet printing press 01. The coating machine 01 preferably has at least one non-impact coating unit 600, in particular a jet coating unit 600 or inkjet coating unit 600. The printing press additionally has, for example, at least one flexographic coating unit 400; 800.

[0015] Unless explicitly differentiated, the term sheet-shaped substrate 02, in particular a printing material 02, specifically sheet 02, is intended to encompass in principle any substrate 02 that is present in a flat form and in sections, i.e. also substrates 02 that are present in panel or plate form, i.e. also sheets or plates. The sheet-shaped substrate 02 or sheet 02 defined in this way is made, for example, of paper or cardboard, i.e. as a paper or cardboard sheet, or by sheets 02, sheets or possibly plates made of plastic, cardboard, glass or metal. More preferably, the substrate 02 is corrugated cardboard 02, in particular corrugated cardboard sheets 02. A thickness of a sheet 02 is preferably understood to mean a dimension orthogonal to a largest area of ​​the sheet 02. This largest area is also referred to as the main area.The thickness of the sheets 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. Significantly greater thicknesses are also common, for example, at least 4 mm or even 10 mm or more, for corrugated cardboard sheets 02. Corrugated cardboard sheets 02 are comparatively stable and therefore not very flexible. Appropriate adjustments to the sheet-fed printing press 01 therefore facilitate the processing of thicker sheets 02.

[0016] The sheet-fed printing press 01 preferably has a plurality of units 100; 200; 300; 400; 600; 800; 1000, which are designed, for example, as modules 100; 200; 300; 400; 600; 800; 1000.

[0017] The sheet-fed printing press 01 preferably has at least one unit 100 designed as a substrate feed device 100, also called a sheet feeder 100, in particular a sheet feeder unit 100, which is further preferably designed as a module 100, in particular as a sheet feeder module 100.

[0018] The sheet-fed printing press 01 preferably has at least one unit 200 configured as a conditioning device 200, in particular a conditioning unit 200, which is further preferably configured as a module 200, in particular as a conditioning module 200. Such a conditioning device 200 is configured, for example, as a preparation device 200 or as a post-treatment device.

[0019] The sheet-fed printing press 01 preferably has at least one unit 300 configured as a feed device 300, in particular a feed unit 300, which is further preferably configured as a module 300, in particular as a feed module 300. The at least one feed device 300 is alternatively configured as a component of the substrate feed device 100.

[0020] The sheet-fed printing press 01 preferably has at least one unit 400; 600; 800 designed as a coating device 400; 600; 800, also called a coating unit 400; 600; 800, which is more preferably designed as a module 400; 600; 800, in particular a coating module 400; 600; 800. The at least one coating unit 400; 600; 800 is arranged and / or constructed depending on its function and / or coating method. The at least one coating unit 400; 600; 800 preferably serves to apply at least one respective coating agent to the entire surface and / or part of the surface of the sheets 02. An example of a coating unit 400; 600; 800 is a priming unit 400, which serves in particular to apply priming agent to sheets 02. Another example of a coating unit 400; 600; 800 is a printing unit 600, which serves in particular to apply printing ink and / or ink to sheet 02.Another example of a coating unit 400; 600; 800 is a varnishing unit 800, which is used in particular for applying varnish to sheet 02.

[0021] The sheet-fed printing press 01 preferably has at least one unit 400, in particular a priming unit 400, designed as a priming device 400, also referred to as a priming unit 400, which is further preferably designed as a module 400, in particular as a priming module 400. This is preferably a flexo coating unit 400 and / or flexo coating module 400.

[0022] The sheet-fed printing press 01 preferably has at least one unit 600 designed as a printing unit 600, which is further preferably designed as a module 600, in particular as a printing module 600.

[0023] The sheet-fed printing press 01 preferably has at least one unit 800, in particular a coating unit 800, designed as a coating device 800, also called a coating unit 800, which is further preferably designed as a module 800, in particular as a coating module 800. This is preferably a flexo coating unit 800 and / or a flexo coating module 800.

[0024] The sheet-fed printing press 01 preferably has at least one unit 1000, in particular delivery unit 1000, designed as a substrate delivery device 1000, also called a sheet delivery 1000, which is further preferably designed as a module 1000, in particular as a delivery module 1000.

[0025] A transport direction T provided in particular for transporting sheets 02 is a direction T which is preferably at least substantially and more preferably completely horizontally oriented and / or which preferably points from a first unit 100; 200; 300; 400; 600; 800 of the sheet-fed printing press 01 to a last unit 200; 300; 400; 600; 800; 1000 of the sheet-fed printing press 01, in particular from a sheet feeder unit 100 or a substrate feed device 100 on the one hand to a delivery unit 1000 ora substrate delivery device 1000 on the other hand, and / or which preferably points in a direction in which the sheets 02 are transported apart from vertical movements or vertical components of movements, in particular from a first contact with an assembly 200; 300; 400; 600; 800; 1000 of the sheet-fed printing press 01 arranged downstream of the substrate feed device 100 or first contact with the sheet-fed printing press 01 to a last contact with the sheet-fed printing press 01. Regardless of whether the feed device 300 is an independent assembly 300 or module 300 or is a component of the substrate feed device 100, the transport direction T is preferably the direction T in which a horizontal component of a direction points which is oriented from the feed device 300 to the substrate delivery device 1000.

[0026] A working width of the sheet-fed printing press 01 and / or of the at least one coating unit 400; 600; 800 is preferably a dimension that preferably extends orthogonally to the transport path provided for the transport of sheets 02 through the at least one coating unit 400; 600; 800, more preferably in a transverse direction A. The transverse direction A is preferably a horizontally running direction A. The transverse direction A is oriented orthogonal to the intended transport direction T of the sheets 02 and / or orthogonal to the transport path 02 provided for the transport of sheets 02 through the at least one coating unit 400; 600; 800. The working width of the sheet-fed printing press 01 preferably corresponds to a maximum width that a sheet 02 may have in order to still be able to be processed with the sheet-fed printing press 01, i.e. in particular to a maximum sheet width that can be processed with the printing press 01.The width of a sheet 02 is to be understood in particular as its dimension in the transverse direction A. This is preferably independent of whether this width of the sheet 02 is greater or smaller than an orthogonal horizontal dimension of the sheet 02, which more preferably represents the length of this sheet 02. The working width of the sheet-fed printing press 01 preferably corresponds to the working width of the at least one coating unit 400; 600; 800, in particular printing unit 600. The working width of the sheet-fed printing press 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.

[0027] The sheet-fed printing press 01 preferably has transport means 611 at one or more locations, which are preferably designed as suction transport means 611, in particular as a suction belt 611. Such suction transport means 611 preferably serve to move sheets 02 forward in a controlled manner. In this case, a relative negative pressure is preferably used to pull and / or push the sheets 02 against at least one transport surface 718, and a transport movement of the sheets 02 is preferably generated by a corresponding, in particular circumferential, movement of the at least one transport surface 718. The negative pressure is in particular a negative pressure relative to an ambient pressure, in particular relative to an atmospheric pressure.

[0028] A suction transport means 611 is therefore preferably understood to be a device that has at least one movable transport surface 718, which serves in particular as a counter-pressure surface 718 and is, for example, at least partially movable at least in the transport direction T. Furthermore, the suction transport means 611 has at least one vacuum chamber 719, which is connected to at least one vacuum source 733 by means of a suction line 721. The vacuum source 733 has, for example, a blower 733. The at least one vacuum chamber 719 has at least one suction opening 722, which serves to suck in the sheets 02. The respective suction opening 722 is preferably an opening that penetrates a support plate 727 of the vacuum chamber 719. The sheets 02 are thus preferably sucked into a position in which they close one or more suction openings 722. For example, the transport surface 718 has one or more suction openings 723.The suction openings 723 preferably serve to convey a negative pressure from the suction opening 722 of the vacuum chamber 719 to the transport surface 718, in particular without pressure losses or with very low pressure losses. For example, at least one deflection means 724 is arranged, which directly or indirectly ensures a circumferential movement of the at least one transport surface 718. Preferably, the at least one deflection means 724 and / or the transport surface 718 itself is driven and / or drivable, in particular to ensure a movement of the sheets 02.

[0029] The at least one suction transport means 611 is preferably a suction belt 611 or suction conveyor belt 611. A suction belt 611 is understood to mean a device that has at least one flexible conveyor belt 718; 726 that forms the transport surface 718. The at least one conveyor belt 718; 726 is preferably deflected by deflection means 724 designed as deflection rollers 724 and / or deflection cylinders 724 and / or is preferably self-contained, so that endless circulation is possible. The at least one conveyor belt 718; 726 preferably has a plurality of suction openings 723. The at least one conveyor belt 718; 726 preferably covers the at least one suction opening 722 of the at least one vacuum chamber 719 in at least a portion of its circulation path. Further preferably, the vacuum chamber 719 is then connected to an environment and / or to sheet 02 only through the suction openings 723 of the at least one conveyor belt 718; 726.Preferably, support means 727 are provided which prevent the at least one conveyor belt 718; 726 from being pulled too far or even into the vacuum chamber 719 and / or which ensure that the transport surface 718 assumes a desired shape, for example such that it forms a flat surface at least in the region in which its suction openings 723 are connected to the vacuum chamber 719. Such a support means 727 is, for example, the at least one support plate 727. A circumferential movement of the at least one conveyor belt 718 then results in a forward movement of the transport surface 718, with sheets 02 being held securely on the transport surface 718 precisely in the region in which they lie opposite the suction opening 722 covered by the at least one conveyor belt 718; 726 with the exception of the suction openings 723.

[0030] The at least one suction transport means 611 preferably has at least one, in particular flexible, transport belt 718; 726, which extends with at least one transport section of its circulation path parallel to the transport direction T along a partial region of the transport path provided for the transport of sheets 02, in particular extending over a transport length. The at least one transport belt 718; 726 preferably has a plurality of suction openings 723. The transport section is stationary, even when the transport belt 718; 726 is moving, and in particular is not permanently assigned to any component of the transport belt 718; 726.

[0031] In an alternative or additional development, the sheet-fed printing press 01 is preferably characterized in that at least one coating station 609 of at least one coating unit 600 of the sheet-fed printing press 01 is arranged along the transport section of the at least one conveyor belt 718; 726. Further preferably, at least two, even more preferably at least three, and even more preferably at least four coating stations 609 of at least one coating unit 600 of the sheet-fed printing press 01 are arranged along the transport section of the at least one conveyor belt 718; 726. For example, at least one drying device 506 of the sheet-fed printing press 01 is arranged along the transport section of the at least one conveyor belt 718; 726.

[0032] The sheet-fed printing press 01 preferably has at least one inkjet printing unit 600 with at least one print head 616, designed in particular as an inkjet print head 616, by which at least one first application point 618 of the inkjet printing unit 600 is defined. The at least one inkjet printing unit 600 preferably has at least one transport means 611 for sheets 02, designed as a suction belt 611, which extends along a transport path provided for transporting sheets 02 beneath the at least one first application point 618 of the inkjet printing unit 600. The at least one transport means 611 preferably has at least one flexible transport belt 726, which forms a transport surface 718 movable in a transport direction T and has a plurality of suction openings 723.The at least one transport means 611 preferably has at least one vacuum chamber 719, which has at least one support plate 727 with a plurality of suction openings 722. In particular, the support plate 727 at least partially and at least temporarily forms a boundary of the interior of the vacuum chamber 719. Preferably, the at least one flexible conveyor belt 726 is arranged to slideably rest on the at least one support plate 727 in such a way that, by moving the at least one flexible conveyor belt 726 in the transport direction T, the suction openings 723 can be at least partially aligned with the suction openings 722. In particular, the suction openings 723, together with the suction openings 722, then form corresponding flow-through connections, for example between the vacuum chamber 719 and an outer region or a sheet 02.As described, the transverse direction A is a horizontal direction A which is oriented orthogonally to the transport direction T.

[0033] The transport means 611 preferably has at least one cover device 728 which is movable in and / or counter to the transverse direction A and which is more preferably designed as a cover plate 728, in particular as a cover sheet 728. The at least one support plate 727 is preferably arranged between the at least one cover device 728 and the flexible conveyor belt 726. The at least one support plate 727 is preferably in contact with both the at least one flexible conveyor belt 726 and the at least one cover device 728. The at least one cover device 728 preferably has a plurality of control openings 729. The control openings 729 can preferably be brought into at least partial alignment with the suction openings 722 by a movement of the at least one cover device 728 in and / or counter to the transverse direction A.In particular, the suction openings 722, together with the control openings 729, then form corresponding flow-through connections, for example, between the vacuum chamber 719 and an outer region or the at least one flexible conveyor belt 726. By appropriately arranging the covering device 728, an air flow through the suction openings 723 can be interrupted in the corresponding region. This is particularly advantageous if the corresponding region correlates with an application site 618, because air flows that would influence the respective trajectory of ink drops can then be prevented or reduced.In an alternative or additional development, the sheet-fed printing press 01 is preferably characterized in that the at least one inkjet print head 616 is arranged aligned with a part of the flexible transport belt 726 and that the at least one application point 618 is arranged at the same location with respect to the transport direction T as at least a part of the at least one covering device 728.

[0034] In an alternative or additional development, the sheet-fed printing press 01 is preferably characterized in that the suction openings 722 of the at least one support plate 727 are arranged in suction rows 732 such that at least four, more preferably at least six, even more preferably at least ten, and even more preferably at least twenty suction openings 722 are arranged one behind the other in the transport direction T. Then, all suction openings 722 of such a suction row 732 can interact one after the other with the same suction openings 723.

[0035] In an alternative or additional development, the sheet-fed printing press 01 is preferably characterized in that the control openings 729 are each designed as rectilinear slots 729 that extend in a control direction S. These slots 729 preferably have two parallel rectilinear boundaries that are at least four times as long as they are wide. The control direction S preferably runs parallel to these rectilinear boundaries. The control direction S is preferably a horizontal direction S that encloses a control angle w with the transverse direction A. This control angle w is preferably at least 1°, more preferably at least 45°, even more preferably at least 70°, and even more preferably at least 80°. This control angle w is preferably at most 89°, more preferably at most 87°, and even more preferably at most 86°. This facilitates selective closing of the corresponding suction openings 722.

[0036] In an alternative or additional development, the sheet-fed printing press 01 is preferably characterized in that a dimension a2 of the control openings 729 related to the transverse direction A is larger than a dimension a1 of the suction openings 722 related to the transverse direction A. A flow-through connection then remains, even if the at least one covering device 728 is moved a little further.

[0037] In an alternative or additional development, the sheet-fed printing press 01 is preferably characterized in that the suction openings 722 of the at least one support plate 727 are arranged in suction rows 732 of at least four suction openings 722 each, and that each suction row 732 is assigned one, more preferably at least one, and even more preferably exactly one control opening 729.

[0038] In an alternative or additional development, the sheet-fed printing press 01 is preferably characterized in that a spatial period b1 measured in the transverse direction A, in which the suction rows 732 are arranged, is exactly as large as a spatial period b2 measured in the transverse direction A, in which the control openings 729 are arranged.

[0039] In an alternative or additional development, the sheet-fed printing press 01 is preferably characterized in that the covering device 728 can be arranged in at least four relative positions relative to the at least one support plate 727. These preferably merge seamlessly into one another, so that a plurality of further, possibly similar, relative positions can also be achieved.

[0040] A first such relative position is preferably characterized in that all suction openings 722 located in the area of ​​the at least one first application point 618 are arranged completely in register with a control opening 729. This is desired, for example, as long as a sheet 02 moves through the at least one first application point 618. This is also shown by way of example in Fig. 7 shown.

[0041] A second such relative position is preferably characterized in that at least a front part of the suction openings 722, relative to the transport direction T, which are located in the region of the at least one first application point 618, are only partially or not at all arranged in registration with a control opening 729, while at least a rear part of the suction openings 722, relative to the transport direction T, which are located in the region of the at least one first application point 618, are partially or completely arranged in registration with a control opening 729. A front part of the suction openings 722, relative to the transport direction T, is to be understood as suction openings 722 that are reached by a sheet 02 earlier than a corresponding rear part of the suction openings 722, relative to the transport direction T. This second relative position is assumed, for example, when a trailing edge of a sheet 02 reaches the at least one first application point 618.In this way, unfavorable air flow for ink droplets is avoided in the area around the trailing edge of sheet 02. This is also exemplified in . Fig. 8. For a transition from the first relative position to the second relative position, it is sufficient to move at least one covering device counter to the transverse direction A.

[0042] A third such relative position is preferably characterized in that all suction openings 722 located in the area of ​​the at least one first application point 618 are not arranged in register with a control opening 729. This is desired, for example, as long as a sheet gap arranged between sheets 02 moves through the at least one first application point 618. This is also exemplary in Fig. 9. For a transition from the second relative position to the third relative position, it is sufficient to move at least one covering device counter to the transverse direction A.

[0043] A fourth such relative position is preferably characterized in that at least one part of the suction openings 722, which are located in the region of the at least one first application point 618, relative to the transport direction T, are arranged partially or completely in register with a control opening 729, while at least one rear part of the suction openings 722, which are located in the region of the at least one first application point 618, relative to the transport direction T, are arranged only partially or not at all in register with a control opening 729.

[0044] This fourth relative position is assumed, for example, when a leading edge of a subsequent sheet 02 reaches the at least one first application point 618. In this way, unfavorable air flow for ink drops in the area around this leading edge of the subsequent sheet 02 is avoided. This is also exemplified in Fig. 10. For a transition from the fourth relative position to a relative position that largely corresponds to the first relative position, it is sufficient to move at least one covering device counter to the transverse direction A.

[0045] To transition from this relative position, which largely coincides with the first relative position, back to the first relative position, it is sufficient to move the at least one covering device in the transverse direction A. In particular, the fourth, third, and second relative positions are passed through again. This movement occurs, for example, while the subsequent sheet 02 moves through the at least one first application point 02. The process then begins again.

[0046] In an alternative or additional development, the sheet-fed printing press 01 is preferably characterized in that at least one closure drive is arranged to move the at least one covering device 728, and in that the closure drive is signal-technically connected to a machine control system that has access to at least one position signal that indicates a position of at least one sheet 02 and / or at least one sheet gap. The at least one closure drive is to be distinguished in particular from a transport drive M700 of the transport means 611. The at least one closure drive is preferably designed as an electric motor, more preferably as a position-controlled electric motor.

[0047] For example, the at least one printing unit 600 preferably has at least one transport means 611, which is further preferably designed as a suction transport means 611 and / or suction belt 611.This at least one transport means 611 then preferably extends along the transport path provided for the transport of sheets 02 under at least one first job position 618 of the printing unit 600 and preferably under at least one drying device 506 of the printing unit 600 downstream of this at least one first job position 618 and more preferably under each further, in particular downstream, job position 618 of the printing unit 600 and more preferably under each further, in particular downstream, drying device 506 and / or energy output device 504 of the printing unit 600, regardless of whether this drying device 506 and / or energy output device 504 of the printing unit 600 is arranged between job positions 618 of the printing unit 600 or after a last job position 618 of the printing unit 600.This respective transport means 611 therefore preferably extends under all application points 618 of the printing unit 600 and under all drying devices 506 of the printing unit 600 arranged between application points 618 of the printing unit 600 and more preferably under all drying devices 506 of the printing unit 600 arranged after all application points 618 of the printing unit 600. (Such a printing unit is shown as an example in . Fig. 1.)

[0048] Alternatively or additionally, the at least one non-impact coating unit 600 and / or non-impact printing unit 600 and / or the sheet-fed printing press 01 is preferably characterized in that the conveyor belt 718; 726 of the at least one suction belt 611 of the non-impact coating device 600 has a width, measured in the transverse direction A, of at least 30 cm, preferably at least 50 cm, more preferably at least 100 cm, and even more preferably at least 150 cm. This allows correspondingly wide sheets 02 to be transported precisely, and a large working width of the sheet-fed printing press 01 can be achieved.

[0049] Preferably, the sheet-fed printing press 01 is alternatively or additionally characterized in that at least one inspection device 551 is arranged along the transport path provided for the transport of sheets 02, downstream of an application point 618 of the at least one printing unit 600. The inspection device 551 preferably has at least one CCD sensor 553 and / or at least one CMOS sensor 553. Preferably, the inspection device 551 and in particular the at least one sensor 553 of the inspection device 551 are arranged aligned with the transport means 611, in particular the suction belt 611 of the coating module 600, in particular the non-impact coating module 600 and / or the transport belt 718; 724 of the suction belt 611 of the coating module 600, in particular the non-impact coating module 600.

[0050] An example of a sheet-fed printing press 01 comprises a sheet feeder module 100, optionally a first preparation module 200, a coating module 400 designed as a priming module 400 with a preferably integrated drying device 506 or a drying device 506 integrated into the printing unit 600, optionally a second feed module 300, a coating unit 600 designed as a printing unit 600 with an integrated drying device 506, optionally a third feed module 300, optionally an inspection module or an inspection device 551, a coating module 800 designed as a varnishing module 800 with an integrated drying device 506, and a delivery module 1000. The sheet feeder module 100 is preferably designed such that its separating device 109 separates the sheets 02 from below in at least one embodiment (as for example in Fig. 1) or, in at least one other embodiment, separated from above. The first coating unit 600, designed as a printing unit 600, preferably has four application points 618. Of these four application points 618, a first and a second are preferably each formed by at least one or at least two rows of print heads, wherein more preferably the two rows of print heads of the first application point 618 are assigned a first color and the two rows of print heads of the second application point 618 are assigned a second color. Of these four application points 618, the third and the fourth are preferably each formed by at least one or at least two rows of print heads, wherein more preferably the two rows of print heads of the third application point 618 are assigned a third color and the two rows of print heads of the fourth application point 618 are assigned a fourth color.

[0051] Preferably, the sheet-fed printing press 01 is characterized, particularly in such an example, in that at least one drying device 506 for intermediate drying is arranged after the second application point 618 of the printing unit 600, and in that at least one and more preferably at least two drying devices 506 are arranged after a last application point 618 of the printing unit 600. Optionally, a fifth and a sixth application point 618 are arranged, which are constructed analogously to the other application points 618 and to which a fifth and a sixth color are assigned, respectively. Preferably, all application points 618 and / or all drying devices 506 of the printing unit 600 are arranged aligned with the one transport means 611 of the printing unit 600. Preferably, at least one inspection device 551 is arranged aligned with the one transport means 611 of the printing unit 600.Preferably, at least one standing area 629 for an operator is arranged and / or can be arranged above the transport means 611 of the printing unit 600. Preferably, the sheet-fed printing press 01 is alternatively or additionally characterized in that along the transport path provided for the transport of sheets 02, at least one substrate delivery device 1000 designed as a module 1000 is arranged, in any case after the printing unit 600 and / or in any case after the at least one non-impact coating module 400; 600; 800. Such an example of the sheet-fed printing press 01 is shown schematically and by way of example in , as described. Fig. 1 shown. List of reference symbols 01 Printing machine, sheet-fed printing machine, non-impact printing machine, corrugated board sheet-fed printing machine 02 Substrate, printing material, sheet, corrugated board, corrugated board sheet 100 unit, module, substrate feeder, sheet feeder unit, sheet feeder module 109 Separation device, sheet separation device 200 unit, module, preparation device, preparation unit, preparation module, conditioning device, conditioning unit, conditioning module 300 aggregate, module, plant equipment, plant aggregate, plant module 400 unit, module, coating device, coating unit, coating module, priming device, priming unit, priming unit, priming module, flexo coating unit, flexo coating module 504 Standard assembly, dryer assembly 505 - 506 Drying device 507 Night drying device 551 Inspection facility 552 - 553 sensor, CCD sensor, CMOS sensor 600 unit, module, coating device, coating unit, coating module, printing unit, printing module, non-impact coating unit, jet coating unit, jet coating module, jet printing unit, jet printing module, inkjet coating unit, inkjet coating module, inkjet printing unit, inkjet printing module 609 coating point, pressure point 610 - 611 Transport means, suction transport means, suction belt 616 printhead, inkjet printhead 617 - 618 Order point 619 stand space 718 Transport surface, counterpressure surface, outer surface, outer surface, conveyor belt, suction box 719 Vacuum Chamber 720 - 721 suction line 722 suction opening 723 intake opening 724 Deflection means, deflection pulleys, deflection rollers, transport roller transport roller 725 - 726 conveyor belt 727 support plate; support means 728 Cover device, cover plate, cover plate 729 control opening; slot 730 - 731 connecting means, traction means, straps, bands 732 suction series 733 Vacuum source, blower 800 unit, module, coating device, coating unit, coating module, coating device, coating unit, coating unit, coating module, flexo coating unit, flexo coating module, 1000 unit, module, substrate delivery device; sheet delivery, delivery unit, delivery module a1 Dimension (722) a2 dimension (729) w steering angle A direction, transverse direction S Control direction T Transport direction M700 drive, motor, electric motor, position-controlled

Claims

[1] Sheet-fed printing press (01), wherein the sheet-fed printing press (01) has at least one inkjet printing unit (600) with at least one inkjet print head (616), by which at least one first application point (618) of the inkjet printing unit (600) is defined, and wherein the at least one inkjet printing unit (600) has at least one transport means (611) for sheets (02) designed as a suction belt (611), which extends along a transport path provided for transporting sheets (02) under the at least one first application point (618) of the inkjet printing unit (600), and wherein the at least one transport means (611) has at least one flexible transport belt (726) which forms a transport surface (718) movable in a transport direction (T) and has a plurality of suction openings (723), and wherein the at least one transport means (611) has at least one vacuum chamber (719),which has at least one support plate (727) with a plurality of suction openings (722) and wherein the at least one flexible conveyor belt (726) is arranged to rest slidably on the at least one support plate (727) in such a way that the suction openings (723) can be at least partially brought into alignment with the suction openings (722) by a movement of the at least one flexible conveyor belt (726) in the transport direction (T), and wherein a transverse direction (A) is a horizontal direction (A),which is oriented orthogonally to the transport direction (T) and wherein the transport means (611) has at least one cover device (728) movable in and / or counter to the transverse direction (A), and wherein the at least one support plate (727) is arranged between the at least one cover device (728) and the flexible conveyor belt (726), and wherein the at least one cover device (728) has a plurality of control openings (729), and wherein the control openings (729) can be at least partially brought into alignment with the suction openings (722) by a movement of the at least one cover device (728) in and / or counter to the transverse direction (A), characterized bythat the control openings (729) are each designed as rectilinear slots (729) which extend in a control direction (S) and which have two parallel rectilinear boundaries and which are at least four times as long as they are wide, and that the control direction (S) runs parallel to these rectilinear boundaries, and that the control direction (S) is a horizontal direction (S) which encloses a control angle (w) with the transverse direction (A), and that the control angle (w) is greater than 1° and less than 90°. [2] Sheet-fed printing machine according to claim 1, characterized by that the at least one inkjet print head (616) is arranged aligned with a part of the flexible transport belt (726) and that the at least one application point (618) is arranged at the same location with respect to the transport direction (T) as at least a part of the at least one covering device (728). [3] Sheet-fed printing machine according to claim 1 or 2, characterized bythat a dimension (a2) of the control openings (729) related to the transverse direction (A) is larger than a dimension (a1) of the suction openings (722) related to the transverse direction (A). [4] Sheet-fed printing machine according to claim 1 or 2 or 3, characterized by that the suction openings (722) of the at least one support plate (727) are arranged in suction rows (732) such that at least four suction openings (722) are arranged one behind the other in the transport direction (T). [5] Sheet-fed printing machine according to claim 1 or 2 or 3 or 4, characterized by that the suction openings (722) of the at least one support plate (727) are arranged in suction rows (732) of at least four suction openings (722) each, and that each suction row (732) is assigned a control opening (729). [6] Sheet-fed printing machine according to claim 4 or 5, characterized bythat a spatial period (b1) measured in the transverse direction (A) in which the suction rows (732) are arranged is the same size as a spatial period (b2) measured in the transverse direction (A) in which the control openings (729) are arranged. [7] Sheet-fed printing machine according to claim 1 or 2 or 3 or 4 or 5 or 6, characterized bythat the covering device (728) can be arranged in at least four relative positions relative to the at least one support plate (727), and that a first relative position is characterized in that all suction openings (722) located in the region of the at least one first application point (618) are arranged completely in register with a control opening (729), and that a second relative position is characterized in that at least a front part of the suction openings (722) located in the region of the at least one first application point (618) relative to the transport direction (T) is arranged only partially or not at all in register with a control opening (729), while at least a rear part of the suction openings (722) located in the region of the at least one first application point (618) relative to the transport direction (T),are arranged partially or completely in register with a control opening (729), and in that a third relative position is characterized in that all suction openings (722) located in the region of the at least one first application point (618) are not arranged in register with a control opening (729), and in that a fourth relative position is characterized in that at least a front part of the suction openings (722) located in the region of the at least one first application point (618) relative to the transport direction (T) is arranged partially or completely in register with a control opening (729), while at least a rear part of the suction openings (722) located in the region of the at least one first application point (618) relative to the transport direction (T) is arranged only partially or not at all in register with a control opening (729). [8] Sheet-fed printing machine according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7, characterized by that at least one closure drive is arranged to move the at least one covering device (728) and that the closure drive is in signal-technical connection with a machine control system which has access to at least one position signal which characterizes a position of at least one sheet (02) and / or at least one sheet gap. [9] Sheet-fed printing machine according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8, characterized by that the at least one support plate (727) is in contact with both the at least one flexible conveyor belt (726) and the at least one covering device (728).

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