Sheet-fed printing press with charging and discharging device

Abstract

The invention relates to a sheet-fed printing press having a charging device (86; 102), a feeding and a removing sheet transport means (34; 61; 35; 69), which form a transfer point (101), wherein a movement path of a gripper system (59; 109) of the removing sheet transport means (35; 69) in the region of ​​the transfer point (101) has a circular arc around a rotation axis (129; 131) and wherein a distance of a discharging electrode unit (123) of the sheet-fed printing press from the rotation axis (129; 131) is smaller than a distance (133) of the transfer point (101) from the rotation axis (129; 131), and to a sheet-fed printing press having a coating unit (05; 06; 07), the earthed impression cylinder (34; 61) of which forms a contact zone (55) and which has a charging electrode unit (88) aligned with the impression cylinder (34; 61), the charge core zone (89; 106) of which is arranged downstream from the contact zone (55) and upstream from a transfer point (101) which leads away, and having a discharging electrode unit (123; 124), the discharge electrode (136; 137) of which is at a distance of at least 10 mm from any earthed component.

Description

[0001] Description

[0002] Sheet-fed printing press with charging and discharging device

[0003] The invention relates to a sheet-fed printing machine with a charging device and a discharging device.

[0004] In sheet-fed offset printing presses, sheets are coated with a coating agent, such as printing ink, in a contact zone between a transfer cylinder and an impression cylinder. Other coating units are also known, such as flexographic coating units, in which the sheets interact directly with a forme cylinder and an impression cylinder. These are used, for example, as printing units or as varnishing units. Depending on the properties of the coating agent and the sheet, the sheets may, for example, stick to the transfer cylinder or the forme cylinder. While the movement of the leading edge of the sheet is largely determined by the grippers of the impression cylinder, the rear edge of the sheet can stretch considerably and / or detach from the impression cylinder. As soon as the trailing edge of the sheet leaves the contact zone, this sheet can abruptly relax.The trailing edge of the sheet may even temporarily overtake its target position on the cylinder circumference. This can negatively impact further sheet transport. This is particularly problematic, however, if an inspection system is installed, through which the sheets are transported on the impression cylinder for inspection. The stretching and the abrupt change in sheet position make evaluation difficult or impossible, especially in the rear area of ​​the respective sheet.

[0005] DE 102008 001 165 A1 discloses a sheet-fed printing press in which the outer surface of a cylinder is electrostatically charged, and then a sheet is placed onto this outer surface. Printing and inspection then take place on this cylinder. An externally acting discharge device is located downstream of a transfer point to a transferter.

[0006] DE 102019 118 565 A1 discloses a sheet-fed printing press which has unloading devices in the area of ​​sheet guide plates.

[0007] EP 2 574 463 B1 discloses a sheet-fed printing machine in which sheets lying on a cylinder are first electrostatically charged, then printed by means of an inkjet print head and then discharged lying on the same cylinder.

[0008] DE 102005 032 601 A1 discloses a sheet-fed printing machine which has an active unloading device in the area of ​​a sheet guiding device.

[0009] The invention is based on the object of creating a sheet-fed printing machine with a charging device and a discharging device.

[0010] The object is achieved according to the invention by the features of claim 1 and the features of claim 15.

[0011] A sheet-fed printing press, which is designed, for example, as a sheet-fed rotary printing press, is preferably assigned a transport path for transporting sheets. The sheet-fed printing press preferably has at least one incoming sheet transport means, for example at least one rotary transport body designed, in particular, as a cylinder and / or impression cylinder, in particular for transporting sheets. The sheet-fed printing press preferably has at least one outgoing sheet transport means, which, together with the incoming sheet transport means, forms a transfer point leading away from the incoming sheet transport means. The sheet-fed printing press preferably has at least one, in particular first, charging device for electrostatically charging sheets, in particular for fixing sheets to the cylinder or impression cylinder, which preferably has at least one, in particular, first charging device applied to a jacket surface of the cylinder or impression cylinder.Impression cylinder aligned and / or alignable, in particular first charging electrode unit. The discharge sheet transport means preferably has at least one gripper system. Preferably, an intended movement path of the at least one gripper system of the discharge sheet transport means has, in sections, at least in the region of the transfer point, the shape of a circular arc around an axis of rotation assigned in particular to the discharge sheet transport means. The sheet-fed printing press preferably has at least one, in particular first, discharge device for removing electrostatic charge from sheets, which further preferably has at least one, in particular first and / or inner, discharge electrode unit.

[0012] The at least one discharge device is designed, for example, as an internal discharge device for removing electrostatic charge from sheets. Preferably, a particularly first distance of this at least one, particularly first and / or inner discharge electrode unit from the rotational axis associated in particular with the discharging sheet transport means is smaller than a particularly second distance of the transfer point from the rotational axis associated in particular with the discharging sheet transport means. This results in the advantage that a discharge of the top side of the sheet can be achieved. Furthermore, in conjunction with the charging electrode unit, there is the advantage that this discharge device can act on the side of the sheet previously acted on by the charging device.In particular, this allows for a discharge in an area where the arcs are not resting on a particularly grounded surface, which would influence the field lines of the electric field and bind the charge carriers to the arc. This prevents the generation and / or transport of ions formed by the discharge device from being disrupted, as occurs when the field lines of the electric field are deflected by grounded components. Grounded components themselves are not suitable for discharge due to particles such as abrasion or dust that are usually present.Alternatively or additionally, at least one discharge device is arranged, which is designed as an external, for example, second discharge device for removing electrostatic charge from sheets and whose at least one second and / or outer discharge electrode unit has a particularly third distance from the rotational axis associated in particular with the discharge sheet transport means, which is greater than the particularly second distance of the transfer point from the rotational axis associated in particular with the discharge sheet transport means. An external discharge device allows discharge from another side of the sheet and thus, if necessary, a two-sided and thus particularly effective discharge.

[0013] In an alternative or additional development, the sheet-fed printing press is preferably characterized in that the sheet-fed printing press has at least one coating unit and that the feeding sheet transport means is designed as an impression cylinder of this coating unit and that the at least one coating unit has at least one further cylinder forming a contact zone with the impression cylinder.

[0014] In an alternative or additional development, the sheet-fed printing press is preferably characterized in that the outgoing sheet transport means is designed as a chain conveyor system, in particular for conveying sheets, and in that a section, called a chain section, of a transport path provided for the transport of sheets is defined by the chain conveyor system, and further preferably in that the at least one, in particular first and / or inner, discharge electrode unit of the at least one first discharge device is arranged to act on sheets in the chain section. Preferably, the at least one, in particular second and / or outer, discharge electrode unit of the at least one, in particular second and / or outer, discharge device is arranged to act on sheets in the chain section. Then, in an advantageous manner, a sufficiently large distance between the first and / or inner discharge electrode unit orthe second and / or outer discharge electrode unit of grounded components. Such distances are, for example, at least 10 mm, preferably at least 15 mm, even more preferably at least 20 mm, even more preferably 25 mm, and even more preferably at least 30 mm. This chain conveyor system is preferably assigned to a sheet delivery of the sheet-fed printing press. Discharge then occurs as directly as possible before a stacking process, enabling proper stacking without unwanted adhesion due to electrostatic forces.

[0015] In an alternative or additional development, the sheet-fed printing press is preferably characterized in that a particularly first charge core zone is a region of a cylinder surface enclosing a cylinder barrel of the impression cylinder, said region being closest to the at least one particularly first charging electrode unit, and further preferably in that the charge core zone is arranged downstream of the contact zone and upstream of the transfer point leading away from the impression cylinder, as seen in the direction of rotation of the impression cylinder. Preferably, the particularly first charge core zone is arranged along the transport path provided for the transport of sheets, upstream of a region of this transport path closest to the particularly first discharging electrode unit. Thus, the sheets can be electrostatically charged at an optimized location.

[0016] Preferably, the first discharge electrode unit is arranged to act on a first main surface of sheets from a first side of the transport path provided for the transport of sheets. Further preferably, the first discharge electrode unit is arranged at least temporarily in such a way as to act on the first main surface of sheets, aligned with this first main surface of sheets. Preferably, the sheet-fed printing press has at least one second, in particular outer, discharge device for removing electrostatic charge from sheets, which has at least one second, in particular outer, discharge electrode unit. The second discharge electrode unit is preferably arranged to act on a second main surface of sheets opposite the first main surface from a second side of this transport path, opposite the first side.Preferably, the second discharge electrode unit is arranged so as to act on the second main surface of the sheet, at least temporarily, aligned with said second main surface of the sheet. Preferably, a region of the transport path provided for the transport of sheets that is closest to the first discharge electrode unit in particular is arranged along this transport path after the transfer point leading away from the cylinder. Preferably, a region of the transport path provided for the transport of sheets that is closest to the first discharge electrode unit is arranged along this transport path before a region of this transport path closest to the second discharge electrode unit. The first discharge electrode unit can thus be arranged relatively far forward along the intended transport path, which advantageously leads to an early start to the discharge of the sheets. The second discharge electrode unit can then likewise be arranged relatively far forward.Any residual charge that may still be present after the discharge electrode units have been activated therefore has more time to dissipate through the atmosphere on the way to the arc deposition.

[0017] In an alternative or additional development, the sheet-fed printing press is preferably characterized in that the sheet-fed printing press has at least one second, in particular outer, discharge device for removing electrostatic charge from sheets, which has at least one, in particular, second and / or outer discharge electrode unit. Preferably, a, in particular, third distance of the at least one discharge electrode unit of the second and / or outer discharge device from the axis of rotation assigned in particular to the outgoing sheet transport means is greater than the, in particular, second distance of the transfer point from the axis of rotation assigned in particular to the outgoing sheet transport means. Preferably, a region of the transport path provided for the transport of sheets that is closest to the second discharge electrode unit is arranged along this transport path after the transfer point leading away from the cylinder.

[0018] In an alternative or additional development, the sheet-fed printing press is preferably characterized in that the at least one first and / or inner discharge electrode unit is arranged closer to the transfer point than the at least one second and / or outer discharge electrode unit of the at least one second or outer discharge device.In an alternative or additional development, the sheet-fed printing press is preferably characterized in that a region of the transport path provided for the transport of sheets, which is closest to the at least one in particular first charging electrode unit, is arranged along this transport path in front of a region of this transport path closest to the in particular first discharging electrode unit and / or that a region of the transport path provided for the transport of sheets, which is closest to the at least one in particular first charging electrode unit, is arranged along this transport path in front of a region of this transport path closest to the second discharging electrode unit and / or that the region of the transport path provided for the transport of sheets, which is closest to the first discharging electrode unit, is arranged along this transport path in front of the region of this transport path closest to the second discharging electrode unit.

[0019] In an alternative or additional development, the sheet-fed printing press is preferably characterized in that at least one inspection system is assigned to the coating unit, which system has a camera arranged so as to be aligned with an inspection zone assigned to the impression cylinder, and in that the inspection zone is arranged after the contact zone and before the transfer point leading away from the impression cylinder, as seen in the direction of rotation of the impression cylinder. This allows for particularly precise positioning of the sheets during their inspection. The charge core zone is preferably arranged before the inspection zone, as seen in the direction of rotation of the impression cylinder. In conjunction with the at least one discharge device, this results in the advantage of being able to precisely inspect sheets and yet stack them precisely, because unwanted sticking together in an incorrect position is avoided.

[0020] Preferably, the feeding sheet transport means is arranged so that it is grounded via at least one grounding device. This allows for particularly effective charging.

[0021] In an alternative or additional development, the sheet-fed printing press is preferably characterized in that at least one sheet guiding device with at least one sheet guiding element is arranged along the transport path provided for the transport of sheets after the transfer point. Preferably, the at least one second and / or outer discharge electrode unit is arranged on this at least one sheet guiding element.

[0022] Embodiments of the invention are illustrated in the drawings and are described in more detail below.

[0023] They show:

[0024] Fig. 1 is a schematic representation of a sheet processing machine;

[0025] Fig. 2 is a schematic representation of a sheet feeder and a sheet system;

[0026] Fig. 3 is a schematic representation of a substructure module of a printing unit; Fig. 4 is a schematic representation of a superstructure module of a printing unit;

[0027] Fig. 5 is a schematic representation of a coating unit;

[0028] Fig. 6 is a schematic representation of a turning device;

[0029] Fig. 7 is a schematic representation of a sheet delivery;

[0030] Fig. 8 is a schematic representation of part of a coating unit with charging devices and downstream sheet guiding element as well as discharging devices;

[0031] Fig. 9 is a schematic representation of a first charging device according to Fig. 8;

[0032] Fig. 10 is a schematic representation of a cylinder with earthing device;

[0033] Fig. 11 is a schematic representation of a charging device with an electrode unit in its working position;

[0034] Fig. 12 is a schematic representation of a charging device with an electrode unit in its storage position;

[0035] Fig. 13 is a schematic representation of a second charging device according to Fig. 8;

[0036] Fig. 14 is a schematic representation of an enlarged section according to Fig. 8, wherein the areas of influence of the discharge devices are indicated;

[0037] Fig. 15 is a schematic representation of an enlarged section according to Fig. 14; Fig. 16 is a schematic representation of a sheet guide plate with comb fingers and external discharge device.

[0038] A machine for processing sheet-shaped substrate B, e.g., a sheet-fed processing machine, comprises at least one substrate feed device 01, designated, for example, as a sheet feeder 01, a feed device 03, designated, for example, as a sheet infeed 03, and a substrate delivery device 08, designated, for example, as a sheet delivery 08. Between the substrate feed device 01 and the substrate delivery device 08, one or more processing stages 05; 06; 07, also designated as units, are arranged, which are designed, for example, as a printing unit 05, 06, a coating unit 07, a drying unit, a calendering unit, or a foil transfer unit, or in another suitable manner. If the sheet-fed processing machine is designed as a printing press, in particular a sheet-fed printing press or sheet-fed rotary printing press, at least one of the units is formed by a printing unit 05, 06, in particular an offset printing unit 05, 06, which is preferably followed by one or more coating units 07.In the case of several printing units 05, 06, the arrangement of one or more coating units 07 between the printing units 05, 06 can also be provided.

[0039] Unless explicitly distinguished, the term sheet-shaped substrate B, in particular a printing material B, specifically sheet B, is intended to encompass any substrate B that is flat and in sections, i.e. also substrates B that are in panel or plate form, i.e. also sheets or plates. The sheet-shaped substrate B or sheet B defined in this way is preferably made of paper or cardboard, i.e. as a paper or cardboard sheet, but can in principle also be formed by sheets B, sheets or plates made of plastic, cardboard or metal. Individual components of a sheet-fed processing machine are described in more detail below using a sheet-fed printing press as an example.

[0040] For example, Fig. 2 shows a substrate feed device 01 designed as a sheet feeder 01 with a conveyor line 02 designed, for example, as a belt table 02 and with a printing material bundle 09 formed, for example, by a sheet stack 09, which is arranged on a receiving device 10, e.g., placed on a stacking plate 10. The stacking plate 10 is connected to transport means 11, which ensure that the top side of the sheet stack 09 is held in a defined position.

[0041] The substrate feed device 01, preferably designed as a sheet feeder 01, preferably comprises sheet separating elements 12 and sheet transport elements 13. The sheet separating elements 12 are designed, for example, as separating suction cups 12 and the sheet transport elements 13 are designed, for example, as transport suction cups 13 and are preferably jointly comprised by a separating device 14, e.g., accommodated in a so-called sheet separator 14. A drive of the sheet separator 14 is designed such that the separating suction cups 12 execute a predominantly vertical movement and the transport suction cups 13 execute a predominantly horizontal movement in or against a sheet transport direction 15. In one embodiment, individual drives are provided for the separating suction cups 12 and the transport suction cups 13.Individual drives are understood here to mean controllable drives that are assigned to one or a group of working elements (sheet separating elements 12 and / or sheet transport elements 13) for their drive, in particular for their drive independently of the drive of (preferably all) other working elements or groups of working elements, in particular without being coupled via a mechanical and / or positive drive connection to drives of other working elements driven individually or likewise in one or more groups. Sheets B of the sheet stack 09 are positioned on stop elements 16, in particular with the sheet leading edge on stop surfaces of front stops 16. A sheet flap 17 can form an approximately vertical continuation of the stop surfaces of the front stops 16 in the upper region of the sheet stack 09.The sheet flap 17 is connected to a drive, preferably a single drive, for example via a flap shaft 18, to which it is connected in a rotationally fixed manner. The sheet flap 17 can thus be pivoted from the position forming a straight continuation of the stop surfaces and thus moved into a position that supports the guidance of the sheets B to the downstream belt table 02. Blowing devices, e.g. so-called blowers, are preferably positioned on the rear of the sheet stack 09 for pre-loosening the sheets B lying in the upper area of ​​the sheet stack 09 and for forming an air cushion that supports the sheets B during conveyance in the sheet transport direction 15. For this purpose, further blowing devices or blowers and / or guide plates can also be provided to the side of the sheet stack 09.

[0042] In order to avoid stopping the sheet-fed printing press during the so-called "change" of the sheet stack 09, i.e. reloading the substrate feed device 01 with new substrate sheets B, in particular a new printing material bundle 09, the sheet feeder 01 is equipped with a non-stop device (not shown here). This non-stop device has, in particular, an auxiliary stack carrier which is arranged on an insertion unit and can be moved into the stacking area of ​​the printing press and is designed, in particular, as a rake, roller blind or plate. The auxiliary stack carrier takes over the remaining stack resting on a transport base 76, in particular a pallet 76, and lifts it, preferably continuously, to ensure trouble-free separation and removal of the topmost sheet B of the remaining stack. During this time, the new stack, arranged on a further pallet 76, is moved in and the remaining stack is subsequently combined with the new stack.The belt table 02 arranged downstream of the sheet stack 09 is designed as a suction belt table 02 in the exemplary embodiment. It preferably comprises two rollers 20; 21, for example a drive roller 20 and a deflection roller 21, between which a single- or multi-part conveying surface 22; 23 can be provided, which is formed, for example, by a single- or multi-part table plate 22 or by a suction box 23 forming the table plate 22. The drive roller 20 and the deflection roller 21 are wrapped by at least one conveyor belt 24, which in the case of the suction belt table 02 is designed as a suction belt 24. The belt is tensioned, for example, with the aid of a tensioning roller 77 and is preferably driven according to a speed profile within a work cycle by an individual belt drive acting, for example, on the drive roller 20. Here, timing rollers 25 correspond to the drive roller 20 and are controlled against the drive roller 20 within a working cycle.

[0043] The feed device 03, referred to for example as a sheet feeder 03, preferably comprises a feed table 26 to which a control device is assigned. The feed table 26 can be designed as a feed plate 26. Stops 27, in particular front stops 27, are guided onto the feed table 26 and thus into the path of the sheets B in the work cycle. The sheets B are fed and aligned with their leading edges against these leading lays 27. A sheet acceleration means 04 is arranged downstream of the leading lays 27, which is designed in particular as an oscillating gripper 04, which feeds the sheets B aligned along the leading edge and optionally along a side edge to a transfer drum 29 designed as a feed drum 29, which transfers the sheets B coming from the conveyor line 02 to an impression cylinder 34 of the downstream printing unit 05.

[0044] In another embodiment, the position of sheet B on the feed table 26 is measured. Sheet B is then transferred to the oscillating gripper 04 during its movement. Preferably, during the movement of the oscillating gripper 04, sheet B is then moved into its correct position and transferred in alignment to the feed drum 29.

[0045] The units 05; 06, in particular printing units 05; 06, for example, have a respective substructure 31, for example designed as a substructure module 31. Of the printing units 05, 06, only the impression cylinders 34, 36, also referred to as impression cylinders 34, and the transfer cylinders 33 that transfer the print image, which together with the impression cylinders 34, 36 form printing zones 55, also referred to as printing points 55 or printing nip 55, are shown in Fig. 3. The transfer cylinders 33 are also referred to as blanket cylinders 33 or blanket cylinders 33. The impression cylinders 34, 36 preferably have a continuous cylinder jacket surface except for at least one axially extending cylinder channel 56. A gripper system 57 for receiving and transferring sheet B in the gripper closure is preferably arranged in the cylinder channel 56. Double-sized printing cylinders 33 accordingly have two gripper systems 57 arranged in each cylinder channel 56.Between the printing cylinders 34, 36, there is generally arranged a transfer drum 35, designed as a transfer drum 35, with curved sheet-supporting elements 58, e.g., so-called drum caps 58, arranged concentrically to the rotational axis. Alternatively, the transfer drum 35 can also be designed without drum caps 58, as a so-called transfer drum 35. For receiving the sheets B from the upstream printing cylinder 34 and transferring them to the downstream printing cylinder 36, the transfer drums 35 preferably have gripper systems 59. During sheet transport on the drum caps 58 of the transfer drum 35, the sheets B can be supported, in particular, by an air cushion guide 60 arranged beneath the transfer drum 35, and thus placed smoothly on the drum caps 58.The transfer drums 35, transfer drums 35, or transfer rollers 35 arranged between the printing cylinders 34 can be single-sized or multi-sized, but are preferably double-sized. Single-sized cylinders can accommodate one sheet B, and double-sized cylinders can accommodate two sheets B circumferentially.

[0046] The units 05; 06, in particular printing units 05; 06, have, for example, in the area of ​​a so-called printing unit superstructure 30, a printing unit cylinder 32, designed in particular as a forme cylinder 32, e.g., as a plate cylinder 32, and, in an embodiment for the offset printing process, also a printing unit cylinder 32, designed in particular as a transfer cylinder 33, e.g., as a blanket cylinder 33. Furthermore, the respective printing unit 05, 06 has, for example, in the area of ​​a so-called printing unit substructure 31, a printing unit cylinder 34 designed as an impression cylinder 34 or impression cylinder 34, and a transfer drum 35, also referred to as a transfer drum 35.

[0047] The printing units 05, 06 are, as can be seen, for example, from the schematically illustrated structure of the printing units 05, 06 in the figures, preferably of a modular design, in particular such that the printing unit superstructure 30 is formed by a first module 30, e.g. a so-called superstructure module 30, and the printing unit substructure 31 is formed by a second module 31, e.g. a so-called substructure module 31. In the modular design, the superstructure module 30 comprises, for example, the forme cylinder 32 and, in an embodiment for the offset printing process, also the transfer cylinder 33. The substructure module 31 has, in particular, the impression cylinder 34 and, for example, the transfer drum 35. In this context, “modular” or module can be understood as a structural unit which, with its main components or at least their connecting elements already pre-assembled in a frame, can be introduced into the machine as a whole and, if necessary,can be dismantled again, whereby the frame is designed as a frame that can be detached from the rest of the machine frame.

[0048] In the case of the modular design, the horizontal division between the superstructure module 30 and the substructure module 31 preferably runs between the transfer cylinder 33 and the impression cylinder 34. The vertical separation surface between the substructure modules 31 or between the printing units 05, 06 is placed, as seen in the sheet transport direction 15, predominantly between the transfer drum 35 of the printing unit 05 and the impression cylinder 36 of the subsequent printing unit 06.

[0049] The aforementioned transfer cylinder 33, e.g., designed as a rubber cylinder 33, can have at least one fastening device with a fastening means 38 for holding and / or tensioning a rubber blanket. For example, a channel 37 designated as a clamping and / or tensioning channel 37, in which the clamping and / or tensioning elements 38, in particular for tensioning a rubber blanket, are arranged, can be provided.

[0050] With respect to the direction of the effective ink flow, the forme cylinder 32, e.g., designed as a plate cylinder 32, is arranged upstream of the transfer cylinder 33. The plate cylinder 32 also has, e.g., at least one fastening device with a fastening means 40 for holding and / or clamping a printing form. The plate cylinder 32 can have a channel 39, also referred to as a clamping and / or tensioning channel 39, in which, e.g., at least one tensioning and / or clamping device 40 for clamping a printing plate onto the outer surface of the plate cylinder 32 is located.

[0051] An automatic or semi-automatic plate changing device 41 can be assigned to the printing unit 05, 06 in the area of ​​the printing unit superstructure 30 or superstructure module 30.

[0052] At least one inking unit 42 is provided for inking the printing form, which is designed, for example, as a printing plate. The inking unit 42 can be designed as a short inking unit 42, as a ductor inking unit 42, as a film inking unit 42 or in another suitable manner. In the case of the design as a ductor inking unit 42, which is preferred here, the inking unit 42 comprises at least one ink supply 43, which can be designed, for example, as a doctor blade or ink fountain 43, at least one ink pickup roller 44 to be inked by the ink supply 43, designed, for example, as a ductor roller or preferably as an ink fountain roller 44, one or more further inking unit rollers 45 and preferably a ductor roller 47, oscillating between the ink pickup roller 44 designed as an ink fountain roller 44 and a first inking unit roller 46, e.g. B. a so-called ink lifter 47. The inking rollers 45 are differentiated into, for example, positively driven ink distribution rollers 48 (shown hatched in Fig. 4) and inking rollers 49, which e.g.driven solely by friction from the inking rollers 48. For applying the ink prepared by the inking rollers 45 to the printing plate, four inking rollers 50 are preferably provided in the exemplary embodiment.

[0053] In the direction of rotation 53 of the plate cylinder 32 during operation, a dampening forme roller 52 is optionally arranged upstream of the inking rollers 50. This roller is assigned to a dampening unit 51, which is designed to apply dampening solution to the surface of the printing plate. A preferably switchable bridge roller 54 can be provided between a first inking roller 50 in the direction of rotation 53 of the plate cylinder 32 and the dampening forme roller 52. This functionally connects the dampening unit 51 and the inking unit 42. In the switchable version, this allows several operating modes for optimizing the dampening solution supply.

[0054] The sheet-fed printing press can include a turning device 78 for turning the sheets B to be printed. The turning device 78 is preferably arranged between the printing units 05, 06 of the press, in particular between the printing cylinders 34. This turning device 78 is preferably configured so that it can be switched from front-to-back printing, so that the press operates either in front-to-back printing mode or in front-to-back and reverse printing mode. Reverse printing means that a sheet B, after being printed by a number of printing units 05, 06, is turned in order to print its reverse side with the subsequent printing units 05, 06. Turning generally occurs according to the trailing edge turning principle (see, for example, Fig. 6). The turning device 78 can, for example, be designed as a three-drum turning device or a single-drum turning device. In the three-drum turning unit, three sheet guiding cylinders 79, 80, 81 are arranged.In the sheet transport direction 15, for example, a single-size or double-size transfer drum 79, a preferably double-size storage drum 80, and a preferably single-size turning drum 81 are arranged. A single-size cylinder can accommodate a sheet B of maximum format circumferentially. Thus, a single-size cylinder has the same diameter as the forme cylinder 32, e.g., designed as a plate cylinder 32, and a double-size cylinder has twice the diameter.

[0055] The turning drum 81 is in particular equipped with a turning gripper system 82, and the storage drum 80 is then equipped with at least one sheet holding system 83 per sheet-supporting outer surface. The sheet holding systems 83 are preferably designed as a gripper system 83 for the leading edge of the sheet. Preferably, fixing elements for the rear area of ​​a sheet B are also provided, which are preferably designed as suction systems 84. The suction systems 84 are preferably connected to adjustable rear outer segments and are adjustable in the circumferential direction relative to the gripper systems 83 on the front outer segments, so that sheets B from the maximum to the minimum format can be held in the front and rear areas on the storage drum 80 in the straight printing mode and / or in the perfecting mode. Sheet guiding elements for guiding the sheets B can be arranged below the storage drum 80 and / or the turning drum 81.In a further development, the turning device 78 is assigned a guide blade for guiding the sheet B between the storage drum 80 and the turning drum 81. A coating unit 07, for example, is arranged downstream of the last printing unit 06. As shown, for example, in the drawings, a cylinder designed as an impression cylinder 61 or impression cylinder 34 is arranged in the substructure 31, e.g., within a substructure module 31. The impression cylinder 61 is preferably structurally identical to the impression cylinders 34, 36 of the printing units 05, 06.

[0056] The area of ​​a coating unit superstructure 62 of the coating unit 07, designed, for example, as a superstructure module 62, differs from the printing unit superstructures 30 and 31.

[0057] Superstructure modules 30 of the printing units 05, 06. Within this coating unit superstructure 62, a coating unit cylinder 63, designed, for example, as a coating forme cylinder 63, is arranged, on which a transfer means designed, for example, as a coating blanket or coating plate is fastened, for example clamped, via a fastening system 64, e.g. a clamping and / or tensioning system 64. To apply the varnish to the coating blanket, designed, for example, in the manner of a rubber blanket, or to the coating plate, an application system 65, preferably designed here as a chambered doctor blade system 65, is used, preferably comprising an inking unit roller 66, in particular an anilox roller 66, having a cup structure on its outer surface, and a chambered doctor blade 67. The chambered doctor blade 67 here contains two doctor blades that interact with the anilox roller 66.

[0058] Downstream of the last printing unit 05, 06 or, if provided, after the coating unit 07, a drying section is preferably provided. To form the drying section, one or more drying devices 68 are arranged in the printing substrate path between the last unit 05, 06, 07 designed as a printing or coating unit 05, 06, 07 and a product bundle 71 formed, for example, by a delivery stack 71. Preferably, one or more drying devices 68 are arranged above and / or below the sheet path in the sheet delivery 08. In a preferred embodiment, the path between the last coating or printing unit 05, 06, 07 and the sheet delivery 08 can be extended, in particular by interposing a drying unit, in order to gain space for the arrangement of further drying devices 68. If necessary, intermediate drying in the press can also be carried out by drying devices 68 assigned to the cylinders.This intermediate drying can also be carried out by a drying unit arranged in the machine.

[0059] The sheet delivery 08 of a sheet-processing machine, here in particular a sheet-fed printing press, specifically a sheet-fed offset rotary printing press, contains a sheet conveying system arranged downstream of a sheet guiding system, here as a sheet guiding cylinder, specifically impression cylinder 34, which is designed in particular as a chain conveying system 69. The sheet conveying system contains traction means moved via drive and deflection means, which drive gripping devices for conveying the sheets. The gripping devices have fixing elements for receiving and fixing the sheets B. Clamping and / or suction grippers for gripping the sheet edges can be used as fixing elements, in particular. In developments not shown, additional gripping devices for the trailing edges of the sheets are provided.

[0060] The sheet conveying system, designed here as a chain conveyor system 69, contains chains 73 laid over and driven by sprockets 72, guided in laterally arranged guide rails (not shown), on which chains gripper carriages 70 are arranged for transporting the sheets B. The sprockets 72 are arranged, for example, for rotation about a rotation axis 129. For this purpose, they are connected, for example, to a sprocket shaft. The gripper carriages 70 convey the sheets B in the sheet transport direction 15 to the delivery stack 71, which is stored, for example, on a pallet 76 or another type of transport support. The gripper carriages 70 preferably contain respective gripper systems 109, in particular leading edge clamping grippers, which have gripper fingers interacting with gripper supports, which are arranged spaced apart on a gripper shaft and are controllable by the latter.For the secure transport of the sheets B held by the gripper carriages 70, a sheet guiding device 127 is provided at least in the sheet delivery 08. For example, at least one drying device 68 is arranged in this area. The sheet guiding device 127 has at least one sheet guiding element 128 or sheet guiding plate 128 facing the gripper carriages 70, which is preferably provided with blown air nozzles and extends across the machine width. Preferably, several such sheet guiding plates 128 are arranged. For example, blow boxes 139 are arranged below the sheet guiding plate 128, via which the blown air nozzles are supplied with blown air, so that a supporting air cushion is formed between the sheet guiding plate 128 and the sheets B transported by the gripper carriages 70. In order to be able to regulate heating of the at least one sheet guiding plate 128 in the area of ​​the at least one drying device 68, a coolant circuit can be integrated.In order to prevent the sheets B from sticking together on the delivery stack 71, a release agent application device (not further designated), in particular a powder device, preferably combined with a device for sucking off the powder, is preferably provided in the area of ​​the sheet delivery 08.

[0061] A braking device (not further designated) is arranged in front of the delivery pile 71 for decelerating the sheets B released by the gripper carriages 70. The braking device can contain rotating suction rings and / or circulating suction belts or be designed as a re-gripper system. The sheets B decelerated by the braking device rest against front stops and are thus deposited in alignment on the delivery pile 71. The delivery pile 71 is preferably lowered by a pile lifting drive by the amount of the sheet thickness deposited at a time, so that the stack surface always maintains an approximately constant level.

[0062] In order to avoid stopping the sheet-fed printing press when changing the transport supports 76, e.g., in the form of pallets 76, the sheet delivery 08 can be equipped with a non-stop device (not shown). This primarily comprises an auxiliary pile support, for example in the form of a roll-up slatted table, in particular also referred to as a roller blind. The roller blind has movably connected bars. In its rest position, it is arranged rolled up in front of the delivery pile 71 and, for stack changing while the sheet-fed printing press is running, is unrolled in the sheet transport direction 15 between two sheets B into a working position parallel to the surface of the delivery pile 71. In this position above the delivery pile 71, this slatted table temporarily receives the incoming sheets B, so that an auxiliary pile is formed. The main pile can then be removed and replaced with a new transport support 76, in particular a pallet 76.At the end of the stack change process, the roller blind is retracted to its rest position and the auxiliary stack is placed on the new pallet 76.

[0063] At least one drive motor (not shown) is assigned to the sheet-fed printing press. In a first embodiment, this at least one drive motor is designed, for example, as a main motor and drives, for example, a closed gear train that forms a drive system. The drive system includes, in particular, the impression cylinders 34, 36, the transfer drums 35, the transfer cylinders 33, the plate cylinders 32, and the inking units 42.

[0064] Individual functional units of the sheet-fed printing press, such as the substrate feed device 01, especially the sheet feeder 01, the ink pickup roller 44 and / or any dampening units 51 provided, can preferably be driven by separate drives, in particular individual drives, i.e. without a mechanical and / or positive drive connection to the drives of the other functional units and the drive system comprising the main motor. In an embodiment further developing the first embodiment, at least the plate cylinders 32 are separated from the drive system and are driven by separate drives, in particular individual drives, assigned only to the respective plate cylinder 32, i.e.without a mechanical and / or positive drive connection to the drives of the other plate cylinders 32 and to the drive system comprising the main motor and to drives of other functional units such as the substrate feed device 01, the ink fountain rollers 44 and / or the dampening units 51. The individual drives of the plate cylinders 32 can in particular be formed by so-called direct drives, wherein the direct drive is understood to mean an above-mentioned individual drive in which the drive motor or its rotor is connected, preferably without intermediate gear elements, directly or optionally via a coupling in a mutually coaxial arrangement to the drive shaft, in particular the journal, of the plate cylinder 32. The drive motor is preferably designed in such a way that the intermediate connection of a gear can be dispensed with.The peripheral speed of the plate cylinders 32 is adapted to the peripheral speed of the cylinders interacting with the plate cylinders 32. According to another embodiment, several of the units, preferably each of the units, have their own drive motor that drives the drive system of the respective unit, but without being coupled to the drives of other units via a mechanical and / or positive drive connection.

[0065] The sheets B are provided in the printing material container 09, which may be configured as a sheet stack 09. The sheet separator 14 captures the top sheet B of the sheet stack 09 and feeds it for further processing. This occurs, for example, as follows:

[0066] The sheet separating devices 12 are guided against the upper side of the sheet stack 09, grasp the topmost sheet B and lift it from the sheet B underneath by moving it back to its starting position. The blowers blow under the sheet B held by the sheet separating devices 12 and thus separate it completely from the sheet B underneath. The sheet B held by the sheet separating devices 12 and completely separated is grasped by the sheet transport devices 13 and released by the sheet separating devices 12. The sheet transport devices 13 convey the grasped sheet B in the sheet transport direction 15, wherein at the start of the sheet transport the sheet flap 17 can be pivoted downwards so that the sheet B can be transported with the leading edge of the sheet to the conveyor section 02, which can be designed as a belt table 02, for example.The timing rollers 25 are initially lifted from the drive roller 20 and rest on the respective sheet B when the sheet is located in the gap between the timing rollers 25 and the drive roller 20. The respective sheet B is then released by the sheet transport elements 13. The sheets B conveyed by the sheet transport elements 13 in the sheet transport direction 15 are positioned on the conveyor section 02, which is designed, for example, as a belt table 02, while maintaining a predetermined shingle spacing and are guided by this or these against the front lays 27 in the work cycle of the sheet-fed printing press and can then be pulled off by the sheet acceleration means 04, which are designed, for example, as oscillating grippers 04.

[0067] The grippers, for example of the oscillating gripper 04, transfer the sheet B to the grippers of the feed drum 29, through which the sheet B is transferred to the gripper system 57 of the printing cylinder 34 of the first printing unit 05.

[0068] Sheet B, now on the printing cylinder 34, is inked by the inking unit 42 via the forme cylinder 32 and, in the offset printing version, via the transfer cylinder 33. This occurs, for example, as follows:

[0069] The printing ink stored in the ink reservoir 43, e.g., in the form of an ink fountain 43, is metered zone by zone onto the ink pickup roller 44, e.g., ink fountain roller 44, and is preferably deposited as an ink strip by the periodically reciprocating ink lifter 47 onto the first inking roller 46, e.g., ink distribution roller 48. This transfers the ink to the ink distribution rollers 48 via friction-driven inking rollers 49. The ink is transferred to the ink forme rollers 50 via further inking rollers 45 and thereby reaches the printing form mounted on the forme cylinder 32. As seen in the direction of rotation of the forme cylinder 32, the application of dampening fluid by the dampening forme roller 52 can take place before the ink is applied by the ink forme rollers 50.

[0070] The ink deposited on the printing form is transferred to the transfer cylinder 33 in accordance with the motif and from there to the sheet B guided by the printing cylinder 34.

[0071] Sheet B is now transferred from the first printing unit 05 to the following printing unit 06 and, if necessary, to subsequent printing units 05 and 06. This happens, for example, as follows:

[0072] Sheet B is transferred from the gripper system 57 of the printing cylinder 34 to the gripper system 59 of the transfer drum 35 and is then guided through the entire sheet-fed printing press. In the individual printing units 05, 06, the ink is then applied to sheet B via the respective transfer cylinders 33.

[0073] On the path of sheet B through the sheet-fed printing press, if a turning device 78 is present, sheet B can also be turned and printed on its reverse side. The operation of the sheet holding system described in the exemplary embodiment in the perfecting mode is as follows:

[0074] Sheet B, printed in straight print on the storage drum 80, is guided by the sheet holding system 83 in the area of ​​the sheet leading edge and additionally secured in the area of ​​the sheet trailing edge by a sheet holding system 84 designed as a suction gripper of the suction system 84. After the sheet leading edge has passed the tangent point between the storage drum 80 and the downstream turning drum 81, it is released by the sheet holding system 83. While the sheet trailing edge passes the tangent point between the storage drum 80 and the downstream turning drum 81, it is taken over by the turning gripper system 82 of the turning drum 81 and released by the sheet holding system 84 of the storage drum 80, so that the sheet trailing edge then becomes the sheet leading edge.

[0075] After sheet B has passed through printing units 05 and 06, it can be coated with a layer of varnish in one or more coating units 07 by the coating forme cylinder 63. The gripper system 111 of the printing cylinder 61 then transfers sheet B to, for example, the chain conveyor system 69 of the sheet delivery 08.

[0076] The sheets B gripped at the leading edge are guided by the gripper carriages 70 after being taken over by the printing cylinder 61 and passing through a deflection area, for example, along a path pointing upwards. The sheets B are dried by the provided drying devices 68 and coated, for example, with powder. The sheets B are transported by the gripper carriages 70 to the height of the delivery stack 71 and deposited there.

[0077] The sheet-fed printing press, which is particularly designed as a sheet-fed rotary printing press, preferably has at least one rotary transport body 34; 61 for transporting sheet B. A rotary transport body 34; 61 is understood to mean, in particular, a rotatably arranged unit or assembly that serves to transport sheet B, in particular around a rotation axis of the corresponding rotary transport body 34; 61. For example, an impression cylinder 34 of a printing unit 05; 06 and / or an impression cylinder 61 of a coating unit 07 represents such a rotary transport body 34; 61.

[0078] The sheet-fed printing press preferably has at least one coating unit 05; 06; 07, which is designed, for example, as a printing unit 05; 06 or as a varnishing unit 07. The at least one coating unit 05; 06; 07 has at least one impression cylinder 34; 61 and at least one further cylinder 33; 63 forming a contact zone 55 with the impression cylinder 34; 61. This contact zone 55 corresponds, for example, in the case of a printing unit 05; 06, to the printing zone 55. The at least one further cylinder 33; 63 forming the contact zone 55 with the impression cylinder 34; 61 is designed, for example, as a transfer cylinder 33 in the case of an offset printing unit 05; 06 or as a varnish forme cylinder 63 in the case of a varnishing unit 07.

[0079] The sheet-fed printing press preferably has at least one charging device 86; 102 for electrostatically charging sheet B, which in particular has at least one charging electrode unit 88; 103. The at least one charging device 86; 102 is preferably designed to fix sheet B to a feeding sheet transport means 34; 61, for example to fix sheet B to a cylinder 34; 61 and in particular to an impression cylinder 34; 61. The at least one charging electrode unit 88; 103 is preferably aligned and / or alignable with a lateral surface 87 of the feeding sheet transport means 34; 61, for example the cylinder 34; 61 or impression cylinder 34; 61. For example, the sheet-fed printing press has at least one first such charging device 86 for electrostatically charging sheet B, which preferably has at least one, in particular first, charging electrode unit 88.The sheet-fed printing press preferably has at least one second such charging device 102 for electrostatically charging sheet B, which preferably has at least one, in particular second, charging electrode unit 103.

[0080] The sheet-fed printing press therefore preferably has at least one charging device 86; 102 for the electrostatic fixing of sheet B to the rotary transport body 34; 61. The coating unit 05; 06; 07, which is designed in particular as a printing unit 05; 06 or varnishing unit 07, preferably has the at least one charging device 86; 102 for the electrostatic fixing of sheet B to the impression cylinder 34; 61, which has at least one charging electrode unit 88; 103 that is aligned and / or alignable with a jacket surface 87 of the impression cylinder 34; 61. The first charging electrode unit 88 preferably has at least one first charging electrode 93, if appropriate several. The second charging electrode unit 103 preferably has at least one second charging electrode 104, if appropriate several. If details are given below with reference to an impression cylinder 34; 61. 61 formed rotation transport body 34; 61 orAlthough the above-described aspects are illustrated with reference to the sheet transport means 34; 61, these are nevertheless transferable to general rotary transport bodies 34; 61 or sheet transport means 34; 61, provided that no contradictions arise. In particular, the charging electrode unit 88; 104 is generally aligned and / or arranged in an alignable manner with a lateral surface 87 of a rotary transport body 34; 61 and is preferably movable between at least two positions.

[0081] A respective charge core zone 89; 106 is preferably a region 89; 106 of a cylinder jacket surface 92 enveloping a cylinder barrel 91 of the cylinder 34; 61, which is designed in particular as an impression cylinder 34; 61, which is closest to the at least one respective charging electrode unit 88; 104. A first charge core zone 89 is then a region 89 of the cylinder jacket surface 92 enveloping the cylinder barrel 91 of the impression cylinder 34; 61, which is closest to the at least one first charging electrode unit 88. The respective charge core zone 89; 106 is preferably arranged after the contact zone 55 and / or before a transfer point 101 leading away from the cylinder 34; 61, which is designed in particular as an impression cylinder 34; 61. The transfer point 101 is in particular the location at which a change of the grippers of the sheet transport means 34; 35; 61; 69 involved, which are effective for holding a respective sheet 02, takes place.The sheet-fed printing press preferably has at least one second charging device 102 for electrostatically charging sheet B and in particular for fixing sheet B to the cylinder 34; 61, which is designed in particular as an impression cylinder 34; 61. The at least one second charging device 102 preferably has at least one second charging electrode unit 103, which is aligned and / or alignable in particular with the outer surface 87 of the cylinder 34; 61, which is designed in particular as an impression cylinder 34; 61. A second charge core zone 106 is then a region 106 of the cylinder outer surface 92 enclosing the cylinder barrel 91 of the impression cylinder 34; 61, which is closest to the at least one second charging electrode unit 103.Preferably, the second charge core zone 106 is arranged after the contact zone 55 and before the transfer point 101 leading away from the impression cylinder 34; 61, and preferably after the first charge core zone 89, as seen in the direction of rotation R of the impression cylinder 34; 61.

[0082] The at least one charging electrode unit 88; 103 can thus electrostatically charge the sheets B transported through the contact zone 55 as close as possible to the contact zone and fix them to the cylinder barrel 91 of the impression cylinder 34; 61. The closer to the contact zone 55 this fixation begins, the shorter the section of the sheet B that is not yet electrostatically fixed when the end of the sheet B leaves the contact area 55 and is therefore no longer held by both cylinders 33; 34; 61; 63. For example, the at least one second charging electrode unit 103 serves to reinforce the fixation created by the first charging electrode unit 88 or to at least partially renew or maintain it. This is relevant, for example, when charge carriers can be transported away through the sheets B via the impression cylinder 34; 61 for corresponding sheets B.

[0083] The respective at least one first and / or second charging electrode unit 88; 103 is preferably arranged to be movable between at least two positions. One of the at least two positions is a working position. Another of the at least two positions is preferably a storage position. The working position is, in particular, a position assumed by the respective charging electrode unit 88; 103 during printing operation and which serves to enable the respective charging electrode unit 88; 103 to act on sheet B. The storage position is, in particular, a position assumed by the respective charging electrode unit 88; 103 in order to be serviced or cleaned and / or to create more space between the charging electrode unit 88; 103 and the rotary transport body 34; 61 or impression cylinder 34; 61.The storage position can, on the one hand, serve for maintenance and / or assembly and / or cleaning of the charging electrode unit 88; 103 or parts of the charging electrode unit 88; 103. However, the storage position preferably has the alternative or additional function of increasing a distance between the rotary transport body 34; 61, preferably designed as an impression cylinder 34; 61, on the one hand, and the at least one charging electrode unit 88; 103, on the other hand, in particular compared to a situation in which the at least one charging electrode unit 88; 103 is arranged in its working position.Preferably, the at least one charging electrode 93; 104 of the at least one charging electrode unit 88; 103 is arranged further away from the rotary transport body 34; 61 when the charging electrode unit 88; 103 is arranged in its storage position than when the charging electrode unit 88; 103 is arranged in its working position, for example at least one and a half times as far, more preferably twice as far and / or at least 5 mm further, more preferably at least 8 mm further.

[0084] Preferably, the at least one charging electrode unit 88; 103 is pivotally mounted, in particular about a respective electrode pivot axis E, and / or the at least one charging electrode unit 88; 103 is designed to be movable between the working position and the storage position by means of a pivoting movement. The at least one charging electrode unit 88; 103 preferably has a respective active side 107, which, when the charging electrode unit 88; 103 is arranged in the working position, is arranged facing the rotary transport body 34; 61, and which, when the charging electrode unit 88; 103 is arranged in the storage position, is arranged facing away from the rotary transport body 34; 61. For example, the at least one charging electrode 93; 104 is enclosed in a housing 119 of the charging electrode unit 88; 103 and is preferably only accessible from one direction from the outside. This direction then determines the effective side 107.The at least one charging electrode 93; 104 preferably has regions with particularly small radii of curvature on its surface, which are more preferably formed as needles 108. These needles 108 are preferably arranged on the active side 107. At these regions, in particular needles 108, a corresponding electric field strength is particularly high and allows for particularly effective charging of the sheets B.

[0085] In its working position, the respective charging electrode unit 88; 103 is arranged at a relatively short distance from the impression cylinder 34; 61. If material of excessive thickness is dragged along with the impression cylinder 34; 61, this could damage the respective charging electrode unit 88; 103 if it remained in place. The adjusting device 104 is therefore designed to allow passive deflection of the respective charging electrode unit 88; 103.

[0086] Preferably, particularly when the first charging electrode unit 88 is arranged in its working position, at least one first charging electrode 93 of the at least one first charging electrode unit 88, for example several and in particular all first charging electrodes 93 of the at least one first charging electrode unit 88, has a minimum first distance 94 from the impression cylinder 34; 61. The minimum first distance 94 is preferably at least 4 mm, more preferably at least 5 mm, even more preferably at least 7 mm, and even more preferably at least 9 mm. In particular, regardless of this, the minimum first distance is preferably at most 13 mm, more preferably at most 12 mm, and even more preferably at least 11 mm.Preferably, particularly when the first charging electrode unit 88 is arranged in its working position, at least one first charging electrode 93 of the at least one first charging electrode unit 88, for example several and in particular all first charging electrodes 93 of the at least one first charging electrode unit 88, has a minimum second distance 96 from the further cylinder 33; 63. The minimum second distance 96 is preferably at least 4 mm, more preferably at least 5 mm, even more preferably at least 7 mm, and even more preferably at least 9 mm. In particular, regardless of this, the minimum second distance is preferably at most 35 mm, more preferably at most 30 mm, even more preferably at most 20 mm, even more preferably at most 15 mm, and even more preferably at most 12 mm.An operationally applied and / or applicable working voltage of the charging electrode unit 88 is preferably at least 2 kV, more preferably at least 3 kV, even more preferably at least 5 kV, and even more preferably at least 8 kV. This operationally applied and / or applicable working voltage of the charging electrode unit 88 is preferably at most 20 kV, more preferably at most 15 kV, even more preferably at most 12 kV, and even more preferably at most 11 kV. These working voltages are preferably DC voltages.

[0087] With regard to the distances and / or voltages, the same preferably applies to the at least one second charging electrode unit 103 and its second charging electrodes 104.

[0088] Preferably, the sheet transport means 34; 61 or rotary transport body 34; 61, preferably designed as a cylinder 34; 61 and in particular as an impression cylinder 34; 61, is arranged so as to be grounded via at least one grounding device 113 and in particular via at least one carbon brush 112. The grounding device 113 has, for example, a lever arm 116 pivotably mounted about a pivot axis 114, which is held by a spring element 117 in a position in which the at least one carbon brush 112 is in contact with at least one slip ring 118, which is rigidly arranged relative to the cylinder barrel 91.

[0089] Preferably, the coating unit 05; 06; 07, which is designed in particular as a printing unit 05; 06 or coating unit 07, is assigned at least one inspection system 97, which has a camera 99 arranged so that its detection range is aligned with an inspection zone 98 assigned to the impression cylinder 34; 61. For example, an illumination device is arranged additionally and / or integrated. This inspection zone 98 is preferably arranged downstream of the contact zone 55 and / or upstream of the transfer point 101 leading away from the impression cylinder 34; 61, as seen in the direction of rotation R of the impression cylinder 34; 61. The camera 99 is preferably designed as a high-resolution camera 99 and is preferably part of a system for detecting and / or regulating register and / or color values ​​and / or print image contents. This camera 99 is arranged, for example, downstream of a last printing unit 06 and / or downstream of a last coating unit 07 in the transport direction.Preferably, particularly when the charging electrode unit 88; 103 is arranged in its working position, the charge core zone 89; 106 is arranged in front of the inspection zone 98 and preferably after the contact zone 55, as seen in the direction of rotation R of the impression cylinder 34; 61.

[0090] The sheet-fed printing press preferably has a higher-level machine control system. For example, drives that cause rotation of at least the impression cylinder 34; 61 and / or drives that cause rotation of at least one forme cylinder 32 and / or at least one coating forme cylinder 63 are connected to this machine control system via circuitry. For example, this higher-level machine control system is connected to a control station of the sheet-fed printing press via circuitry. Preferably, the at least one charging device 86; 104 is connected to the higher-level machine control system of the sheet-fed printing press via circuitry. For example, the at least one charging device 86; 104 has a respective high-voltage generator that is arranged connected to the at least one charging electrode unit 88; 103 and / or the at least one charging electrode 93; 104.For example, the at least one charging device 86; 102 is connected to the higher-level machine control system of the sheet-fed printing press in such a way that the high-voltage generator is connected to the higher-level machine control system of the sheet-fed printing press in such a way. For example, the at least one charging device 86; 102 is connected in such a way that the application of the working voltage to the at least one charging electrode 93; 104 begins at the earliest with the start of a sheet travel and / or ends at the latest with the end of the sheet travel. This means, in particular, that the at least one charging device 86; 102 is connected to the higher-level machine control system of the sheet-fed printing press in such a way that the operationally provided working voltage is only applied to the at least one charging electrode 93; 104 when the sheet travel is activated.Preferably, the at least one charging device 86; 102 is connected in circuitry to the higher-level machine control of the sheet-fed printing press in such a way that settings relating to this charging device 86; 102 can be made via an operating element of the sheet-fed printing press, which is designed in particular as a machine control station or touch-sensitive display device.

[0091] Preferably, at least one respective position sensor 126 is arranged. This respective position sensor 126 serves, in particular, to check whether the respective charging electrode unit 88; 103 is in its working position or not. For example, the at least one position sensor 126 is designed as a proximity switch 126. Preferably, the at least one position sensor 126 is connected via circuitry to the higher-level machine control system. If the position sensor 126 detects an evasive movement of the respective charging electrode unit 88; 103 while the sheet travel is activated, the machine control system can initiate a stop of the sheet-fed printing press.

[0092] Preferably, the at least one charging device 86; 102 is assigned to a coating unit 05; 06; 07, for example, a last coating unit 05; 06; 07 along a transport path provided for the transport of sheet B. Preferably, the corresponding, for example last, coating unit 05; 06; 07 therefore has at least one charging device 86; 102 for electrostatically fixing sheet B to the impression cylinder 34; 61, which charging device has at least one charging electrode unit 88; 103 aligned and / or alignable with a jacket surface 87 of the impression cylinder 34; 61, in particular at least a first charging electrode unit 88. This is preferably designed as described above and / or below. In particular, the charge core zone 89 is preferably in the direction of rotation R of the impression cylinder 34; 61 is arranged after the contact zone 55 and before the transfer point 101 leading away from the impression cylinder 34; 61.The transport route intended for the transport of substrate 02 is in particular the spatial area which the substrate 02 occupies and / or would occupy, at least temporarily, in the event of its presence.

[0093] The sheet-fed printing press preferably has at least one discharge device 121; 122 for removing electrostatic charge from sheet B. For example, at least one first discharge device 121 and at least one second discharge device 122 are arranged. The at least one first discharge device 121 is preferably arranged along the transport path provided for the transport of sheet B, upstream of the at least one second discharge device 122. The at least one first discharge device 121 is preferably designed as an inner discharge device 121. The at least one second discharge device 122 is preferably designed as an outer discharge device 122. The at least one discharge device 121; 122 has at least one discharge electrode unit 123; 124. In particular, the at least one first or inner discharge device 121 has at least one, in particular first orinner discharge electrode unit 123 and / or the at least one second or outer discharge device 122 has at least one particularly second or outer discharge electrode unit 124.

[0094] The at least one discharge device 121; 122 serves, for example, to remove and / or neutralize charge carriers adhering to sheets B. The at least one discharge device 121; 122 serves, in particular, to remove and / or neutralize charge carriers arranged on sheets B from these sheets B by means of the at least one charging device 86; 102. Accordingly, a region of the transport path provided for the transport of sheets B that is closest to the at least one charging electrode unit 88; 103 and / or the first and / or second charge core zone 89; 106 along this transport path is preferably arranged in front of a region of this transport path that is closest to the first discharge electrode unit 123 in particular and / or in front of a region of this transport path that is closest to the second discharge electrode unit 124.Preferably, the region of the transport path provided for the transport of sheet B closest to the first discharge electrode unit 123 is arranged along this transport path in front of the region of this transport path closest to the second discharge electrode unit 124.

[0095] The at least one discharge device 121; 122 is preferably operated with alternating voltage. In order to ensure optimized operation of the at least one discharge device 121; 122, the respective discharge electrode unit 123; 124 and in particular their respective discharge electrodes 136; 137 preferably have a sufficiently large distance from grounded components. Preferably, the at least one first or inner discharge electrode unit 123 and / or its first or inner discharge electrode 136 has a minimum distance of at least 10 mm, more preferably at least 15 mm, even more preferably at least 20 mm, even more preferably 25 mm and even more preferably at least 30 mm from any grounded component, in particular of the sheet-fed printing press. Preferably, the at least one second or outer discharge electrode unit 124 and / or its second orThe outer discharge electrode 137 maintains a minimum distance of at least 10 mm, more preferably at least 15 mm, even more preferably at least 20 mm, even more preferably 25 mm, and even more preferably at least 30 mm from any grounded component, in particular of the sheet-fed printing press. For example, along the transport path provided for the transport of sheet B, the at least one transfer point 101 is arranged between the respective charging electrode unit 88; 103 of the at least one charging device 86; 102 and the respective discharge electrode unit 123; 124 of the at least one discharge device 121; 122.Then, the transport of the sheets B in the area of ​​the respective charging electrode unit 88; 103 of the at least one charging device 86; 102 can be carried out by a grounded sheet transport means 34; 61 and the transport of the sheets B in the area of ​​the respective discharge electrode unit 123; 124 of the at least one discharge device 121; 122 can be carried out in such a way that grounded components are at a sufficiently large distance from the discharge device 121; 122. In particular, the area of ​​the transport path provided for the transport of sheets B that is closest to the first discharge electrode unit 123 is arranged along this transport path after the transfer point 101 leading away from the cylinder 34; 61. Preferably, the area of ​​the transport path provided for the transport of sheets B that is closest to the second discharge electrode unit 124 is arranged along this transport path after the transfer point 101 leading away from the cylinder 34; 61 transfer point 101 is arranged.

[0096] The sheet-fed printing press preferably has at least one incoming sheet transport means 34; 61 and at least one outgoing sheet transport means 35; 69, which together with the incoming sheet transport means 34; 61 forms the transfer point 101 leading away from the incoming sheet transport means 34; 61, which is in particular a transfer point 101 for transferring sheet B from the incoming sheet transport means 34; 61 to the outgoing sheet transport means 35; 69. This incoming sheet transport means 34; 61 is, for example, a cylinder 34; 61, in particular the cylinder 34; 61 described above and preferably designed as an impression cylinder 34; 61. This outgoing sheet transport means 35; 69 is designed, for example, as a chain conveyor system 69, in particular for conveying sheet B, in particular as the chain conveyor system 69 of the sheet delivery 08. (This is also shown as an example in Fig. 8.) Alternatively, this outgoing sheet transport means 69; 35 is a transfer drum 35 and / or transfer drum 35 or a transferter 35, for example if further coating units 05; 06; 07 follow. Such a transfer drum 35 and / or transfer drum 35 or such a transferter 35 is preferably arranged to be rotatable about a respective rotation axis 131. (This is shown as an example in Fig. 3, wherein additionally at least one corresponding charging device (not shown in Fig. 3) and / or at least one inspection device (not shown in Fig. 3) can be arranged.) The incoming sheet transport means 34; 61 preferably has at least one gripper system 57, more preferably two in the circumferential direction. The outgoing sheet transport means 35; 69 preferably has at least one gripper system 59; 109, in particular for holding sheets B.

[0097] A designated movement path of the at least one gripper system 59; 109 of the discharge sheet transport means 35; 69 preferably has, in sections at least in the area of ​​the transfer point 101, the shape of a circular arc around a rotation axis 129; 131 associated in particular with this discharge sheet transport means 35; 69. This movement path is to be distinguished in particular from movements that serve solely to open and close grippers.

[0098] The at least one first discharge device 121 is preferably designed as an internal discharge device 121. The sheet-fed printing press, and in particular its preferably first discharge device 121, preferably has at least one first discharge electrode unit 123 designed as an internal discharge electrode unit 123 for removing electrostatic charge from sheet B. A first distance 132 of this at least one first discharge electrode unit 123 from the rotational axis 129; 131, which is assigned in particular to the outgoing sheet transport means 35; 69, is then smaller than a second distance 133 of the transfer point 101 from this rotational axis 129; 131, which is assigned in particular to the outgoing sheet transport means 35; 69. A chain section of the transport path provided for the transport of sheet B is preferably defined by the chain conveyor system 69.The at least one first and / or inner discharge electrode unit 123 of the at least one first and / or inner discharge device 121 is preferably arranged to act on sheet B in the chain section. This action preferably occurs only in a part of the chain section.

[0099] Preferably, at least the coating unit 05; 06; 07 preceding the transfer point 101 is designed as a coating unit 05; 06; 07 for applying coating agent to sheet B from a first side of this transport path, and the at least one first and / or inner discharge electrode unit 123 is arranged to act on sheet B from this first side of this transport path.

[0100] Alternatively or in addition to an inner discharge device 121, at least one outer discharge device 122 is preferably arranged, in particular as a second discharge device 122 in addition to the first discharge device 121.

[0101] The sheet-fed printing press preferably has at least one first discharge device 121 for removing electrostatic charge from sheet B, which has at least one first, in particular inner, discharge electrode unit 123, wherein the first discharge electrode unit 123 is preferably arranged to act on a first main surface of sheet B from a first side of this transport path. This first side is referred to, for example, as the top side, since it is to be assigned to a spatial region that is arranged substantially above the transport path. The first discharge electrode unit 123 is preferably arranged, at least temporarily, aligned with this first main surface of sheet B to act on a first main surface of sheet B. A main surface is understood to mean a largest surface of the respective sheet B.The sheet-fed printing press preferably has at least one second discharge device 121 for removing electrostatic charge from sheet B, which further preferably has at least one second, in particular outer, discharge electrode unit 124, wherein the second discharge electrode unit 124 is preferably arranged to act on a second main surface of sheet B opposite the first main surface from a second side or underside of this transport path opposite the first side or top side. The second discharge electrode unit 124 is preferably arranged at least temporarily aligned with this second main surface of sheet B for acting on the second main surface of sheet B.

[0102] The sheet-fed printing press thus has, for example, at least one preferably second, outer discharge device 122 for removing electrostatic charge from sheet B, which in particular has at least one second or outer discharge electrode unit 124. Preferably, a particularly third distance 134 of the at least one second or outer discharge electrode unit 124 of the second or outer discharge device 122 from the rotational axis 129; 131, which is assigned in particular to the outgoing sheet transport means 35; 69, is greater than the particularly second distance 133 of the transfer point 101 from the rotational axis 129; 131, which is assigned in particular to the outgoing sheet transport means 35; 69.

[0103] Preferably, the at least one second and / or outer discharge electrode unit 124 of the at least one second and / or outer discharge device 122 is arranged to act on sheet B in the chain section. Preferably, the at least one first and / or inner discharge electrode unit 123 is arranged closer to the transfer point 101 than the at least one second and / or outer discharge electrode unit 124 of the at least one second and / or outer discharge device 122, in particular viewed along the transport path provided for the transport of sheet B.

[0104] As described, the sheet-fed printing press preferably has at least one sheet guiding device 127, at least in the area of ​​the sheet delivery 08, which, for example, has at least one sheet guiding element 128, particularly designed as a sheet guiding plate 128. Thus, at least one sheet guiding device 127 with at least one sheet guiding element 128 is preferably arranged along the transport path provided for the transport of sheet B after the transfer point 101. Further preferably, the at least one second and / or outer discharge electrode unit 123; 124 is arranged on this at least one sheet guiding element 128.

[0105] For example, a respective sheet guiding device 127 is arranged in the area of ​​one or more or all of the coating units 05; 06; 07 and / or in the area of ​​the sheet delivery 08 below the transport path provided for the transport of sheet B. For example, at least one respective sheet guiding device 127 of this type is arranged along the transport path provided for the transport of sheet B after the transfer point 101. The respective sheet guiding device 127 preferably has a respective sheet guiding plate 128. Such a sheet guiding plate 128 is preferably designed, in particular, as a metallic sheet guiding plate 128, which extends, in particular, across the width of the machine. Such a sheet guiding plate 128 preferably has comb fingers 138, in particular in an area facing the impression cylinder 34; 61. Along the transport path provided for the transport of sheet B, the comb fingers 138 are preferably followed in each case by an outer orsecond discharge device 122 or discharge electrode unit 124, wherein the comb fingers 138 of the sheet guide plate 128 are made, in particular, partially or entirely of metallic material. For example, the comb-shaped regions of the respective sheet guide element 128 are provided with blast air openings and, in particular, can be switched to blast air, so that a pneumatic force acting on the sheets B can be generated in these regions. Therefore, the sheets B are preferably peeled off the outer surface of the upstream impression cylinder 34; 61 by the pneumatically acting comb fingers 138.

[0106] A sheet guiding element 128, in particular a sheet guiding plate 128, beneath a sheet conveying system, in particular a transfer drum 35, can consist of a single-piece sheet or be composed of multiple sections. For example, an upstream section can form a first area and a downstream section can form a second area for sheet guidance. For example, a first section or partial plate can extend from the jacket of the impression cylinder 34; 61 to vertically below the rotational axis of the transfer drum 35. A second section or partial plate can extend along the transport path and reach to the jacket surface of the downstream impression cylinder 34; 61. A corresponding outer and / or second discharge device 122 or discharge electrode unit 124 is assigned, for example, to the first section of the sheet guiding element 128.Preferably, the outer and / or second discharge device 122 or discharge electrode unit 124 forms a sheet guiding surface of the sheet guiding device 127 in its arrangement region. In particular, at least one fan 139 can be assigned to a sheet guiding element 128, in particular a sheet guiding plate 128, which fan can be controlled in particular to generate blowing and / or suction air.

[0107] Preferably, the section or a second region of the sheet guiding element 128, in particular the sheet guiding plate 128, which is arranged downstream with respect to the intended transport path is designed concentrically to the rotational axis 129; 131 of the outgoing sheet transport means 35; 69. In the case of a transfer drum 35, the sheet guiding surface of the second section of the sheet guiding element 128, in particular the sheet guiding plate 128, is preferably designed concentrically around the rotational axis 131 of the transfer drum 35. In the case of a chain conveyor system 69, the sheet guiding surface of the second section of the sheet guiding element 128, in particular the sheet guiding plate 128, is preferably designed concentrically around the rotational axis 129 of the corresponding at least one chain wheel 72. For example, the first section of the sheet guiding element 128, in particular the sheet guiding plate 128, has in orfrom the area of ​​the impression cylinder 34; 61, a sheet guiding surface that steadily approaches the axis of rotation 129; 131 of the outgoing sheet transport means 35; 69. The sheet guiding element 128 is then designed to be spiral-shaped. In particular, regardless of the possible design as partial pieces, the sheet guiding element 128 preferably has a greater distance from the axis of rotation 129; 131 of the outgoing sheet transport means 35; 69 in its areas closest to the first and / or inner discharge device 121 and / or the second and / or outer discharge device 122 than in at least one area of ​​this sheet guiding element 128 arranged downstream along the intended transport path. For this purpose, the sheet guiding element 128 is designed to be spiral-shaped or flat (i.e., in particular, straight in cross-section) in its inlet area.

[0108] Preferably, a respective outer and / or second discharge device 122 or discharge electrode unit 124 is arranged in the first region of the sheet guide plate 128, wherein, if comb fingers 138 are provided, said discharge device is arranged downstream of the comb fingers 138 along the intended transport path. Comb fingers 138 can, for example, extend over a rotation angle range of the discharge sheet transport means 35; 69 of approximately 5°. The respective discharge device 122 or discharge electrode unit 124 can be directly adjacent to the comb fingers 138 or extend over a rotation angle range of at least approximately 10°. The sheet guide surface of the sheet guide plate 128 formed by the comb fingers 138 and / or discharge device 122 or discharge electrode unit 124 approaches the rotation axis 129 along the intended transport path, in particular continuously. 131 of the outgoing sheet transport means 129; 131.

[0109] The at least one outer and / or second discharge device 122 or discharge electrode unit 124 comprises, for example, a cassette arranged in the sheet guide plate 128 with at least one discharge electrode 137. The cassette can preferably be embedded in the sheet guide plate 128 below a sheet conveying system and can also comprise a plurality of preferably identical discharge electrodes 137. The cassette is preferably arranged downstream of the comb fingers 138, which are in particular made of metal, wherein an upstream guide surface section can also be formed between the comb fingers 138 and the cassette. For example, the comb fingers 138 facing an impression cylinder 34; 61 contain spaced-apart, in particular metallic, finger elements, between which the movable gripper fingers of the respective gripper systems 111 can be guided.

[0110] Below the sprocket shaft of the chain conveyor system 69 of the sheet delivery 08, in particular between the sprockets 72, there is arranged, for example, a sheet guiding element 128, which is preferably designed as a sheet guiding plate 128 extending across the machine width and arranged between the side walls. This sheet guiding plate 128 preferably has an at least approximately closed surface for the sliding and / or floating guidance of the sheets B. The sheet guiding plate 128 can be provided with an ink-repellent coating. Furthermore, nozzle openings, in particular Venturi nozzles, for pneumatically guiding the sheets can be assigned to the sheet guiding plate 128. In the area of ​​the impression cylinder 34; 61, the sheet guiding plate 128 is preferably spaced further from the rotational axis 129 of the sprocket shaft or sprocket 72 than the adjoining areas of the sheet guiding plate 128 along the intended transport path.The comb fingers 138 can, for example, be arranged at a distance of a few millimeters, for example between 1 and 10 mm, preferably between 2 mm and 3 mm, from the outer surface of the impression cylinder 34; 61. In particular, the sheet guide plate 128 in the sheet delivery 08 is at least approximately identical in construction to the sheet guide plates 128 in the coating units 05; 06; 07 of the sheet-fed printing press.

[0111] The respective discharge device 121; 122 or discharge electrode unit 123; 124 preferably contains both insulators 141 and one or more discharge electrodes 136; 137 provided with electrical connections. The discharge electrodes 136; 137 are connected to a controllable generator, in particular a high-voltage generator. For example, the at least one discharge device 121; 122 is connected in circuitry to the higher-level machine control system of the sheet-fed printing press at least in such a way that the high-voltage generator is connected in circuitry to the higher-level machine control system of the sheet-fed printing press.

[0112] Preferably, the insulators 141 of the discharge device 121; 122 or

[0113] Discharge electrode units 123; 124 are each arranged transversely to the intended transport path, preferably across the entire width of the sheet guide plate 128, and have surfaces arranged perpendicular to the intended transport path or to the sheet guide surface of the sheet guide plate 128. Preferably, each discharge electrode 136; 137 is arranged here, in particular, between two insulators 141. A front insulator 141 with respect to the intended transport path preferably adjoins, with its vertical or tangential surface, the comb fingers 138, in particular metallic ones. Downstream of the discharge device 121; 122 or discharge electrode unit 123; 124, the sheet guide plate 128 preferably adjoins, preferably directly, a vertical or tangential surface of a rear insulator 141, or the last insulator with respect to the intended transport path.

[0114] Preferably, the respective discharge electrode unit 123; 124 has, alternately arranged, a positive ion-emitting and a negative ion-emitting electrode tip of the respective discharge electrode unit 123; 124, which can operate with or without blown air support.

[0115] Preferably, the influence can be applied to sheet B where it remains free of ion-binding contact with grounded machine parts on both the top and bottom. This advantageously ensures that the ions can pass into the activated deionizing ambient air with little hindrance.

[0116] 01 Substrate feeder, sheet feeder

[0117] 02 Conveyor line, belt table, suction belt table

[0118] 03 Plant equipment, sheet system

[0119] 04 Bow accelerator, swing gripper

[0120] 05 Processing stage, coating unit, printing unit, first

[0121] 06 Processing stage, coating unit, printing unit

[0122] 07 Processing stage, coating plant, varnishing plant

[0123] 08 Substrate discharge device, sheet delivery

[0124] 09 Printing material containers, sheet stacks

[0125] 10 Pick-up device, stacking plate

[0126] 11 Means of transport

[0127] 12 sheet separating device, separating vacuum cleaner

[0128] 13 sheet transport elements, transport suction cups

[0129] 14 Separating device, sheet separator

[0130] 15 Sheet transport direction

[0131] 16 stop elements, front stops

[0132] 17 Arched flap

[0133] 18 valve shaft

[0134] 19 - 0 Roller, drive roller 1 Roller, deflection roller 2 Conveyor surface, table plate 3 Conveyor surface, suction box 4 Conveyor belt, suction belt 5 Timing roller 6 Feed table, feed plate 7 Stop, front stop, front lays Transfer drum, feed drum

[0135] printing unit superstructure, module, first, superstructure module

[0136] printing unit substructure, module, second, substructure module, substructure

[0137] Printing cylinder, forme cylinder, plate cylinder

[0138] Printing cylinder, transfer cylinder, blanket cylinder

[0139] Sheet transport means, cylinders, printing unit cylinders, printing cylinders,

[0140] Impression cylinder, rotary transport body

[0141] transfer drum, transfer drum, transfer

[0142] Printing cylinder, impression cylinder, impression cylinder

[0143] Channel, clamping and / or tensioning channel

[0144] Fasteners, clamping and / or tensioning devices

[0145] Channel, clamping and / or tensioning channel

[0146] Fastening devices, tensioning and / or clamping devices

[0147] Plate changing device

[0148] Inking unit, ductor inking unit, short inking unit, film inking unit

[0149] Paint supply, paint box

[0150] Ink pickup roller, ink fountain roller

[0151] inking rollers first inking roller

[0152] Ductor roller, paint lifter

[0153] Ink rollers, positively driven

[0154] Friction-driven inking rollers

[0155] inking rollers

[0156] dampening system

[0157] dampening roller

[0158] Direction of rotation of the forme cylinder

[0159] Bridge roller

[0160] Pressure zone, pressure point, pressure gap cylinder channel

[0161] Gripper system of the printing cylinder 34

[0162] Arch support elements, drum caps

[0163] Gripper system (35)

[0164] Air cushion guide

[0165] Sheet transport means, cylinders, printing unit cylinders, printing cylinders,

[0166] Impression cylinder, rotary transport body

[0167] Paint shop superstructure, superstructure module of the paint shop

[0168] Coating cylinder, coating forme cylinder

[0169] Fastening system, clamping and / or tensioning system

[0170] Application system, chamber doctor blade system

[0171] inking roller, anilox roller

[0172] Doctor blade, chamber doctor blade

[0173] Drying facility

[0174] Chain conveyor system

[0175] gripping device, gripper trolley

[0176] Display stack, product containers

[0177] sprocket

[0178] Chain

[0179] guideway

[0180] Transport base, pallet

[0181] Tension pulley

[0182] Turning device

[0183] Sheet guide cylinder, transfer drum

[0184] Sheet guide cylinder, storage drum

[0185] Sheet guide cylinder, turning drum

[0186] Turning gripper system

[0187] Sheet holding system, gripper system Sheet holding system, suction system

[0188] Charging device, first lateral surface (34; 61) Charging electrode unit, first charge core zone, first, area

[0189] Cylinder bales (34; 62)

[0190] Cylinder surface (34; 62) charging electrode, first distance, minimum, first

[0191] distance, minimal, second

[0192] Inspection system

[0193] Inspection zone

[0194] camera

[0195] handover point

[0196] Charging device, second charging electrode unit, second charging electrode, second

[0197] Charge core zone, second, active side area (88)

[0198] Needle (93)

[0199] Gripper system (69)

[0200] Gripper system (61)

[0201] Carbon brush earthing device

[0202] Swivel axis

[0203] lever arm

[0204] spring element

[0205] slip ring

[0206] Housing (88)

[0207] Discharge device, first, inner

[0208] Discharge device, second, outer

[0209] Discharge electrode unit, first, inner

[0210] Discharge electrode unit, second, outer

[0211] Sensor, proximity switch

[0212] Sheet guiding device

[0213] Sheet guide element, sheet guide plate

[0214] Rotation axis (72)

[0215] Rotation axis (35)

[0216] Distance, first

[0217] Distance, second

[0218] Distance, third

[0219] Discharge electrode, first, inner (123)

[0220] Discharge electrode, second, outer (124)

[0221] Comb finger

[0222] Fan, blow box

[0223] Isolator B substrate, printing material, sheet

[0224] E Electrode swivel axis

[0225] R Rotation direction

Claims

Claims 1. Sheet-fed printing press, wherein the sheet-fed printing press has at least one incoming sheet transport means (34; 61) and wherein the sheet-fed printing press has at least one charging device (86; 102) for electrostatically charging sheets (B), which charging device has at least one charging electrode unit (88; 103), and wherein the sheet-fed printing press has at least one outgoing sheet transport means (35; 69) which, together with the incoming sheet transport means (34; 61), forms a transfer point (101) leading away from the incoming sheet transport means (34; 61), and wherein the outgoing sheet transport means (35; 69) has at least one gripper system (59; 109), and wherein a provided movement path of the at least one gripper system (59; 109) of the outgoing sheet transport means (35; 69) has the shape of a circular arc in sections, at least in the region of the transfer point (101). around a rotation axis (129;131) and wherein the sheet-fed printing press has at least one first discharge device (121) for removing electrostatic charge from sheets (B), which has at least one first discharge electrode unit (123) and wherein a first distance (132) of this at least one first discharge electrode unit (123) from the rotation axis (129; 131) is smaller than a second distance (133) of the transfer point (101) from the rotation axis (129; 131).

2. Sheet-fed printing machine according to claim 1, characterized in that the feeding sheet transport means (34; 61) is designed as a cylinder (34; 61).

3. Sheet-fed printing machine according to claim 1 or 2, characterized in that the sheet-fed printing machine has at least one coating unit (05; 06; 07) and that the feeding sheet transport means (34; 61) is designed as an impression cylinder (34; 61) of this coating unit (34; 61) and at least one further cylinder (33; 63).

4. Sheet-fed printing press according to claim 3, characterized in that a charge core zone (89; 106) is a region (89; 106) of a cylinder jacket surface (92) enveloping a cylinder barrel (91) of the impression cylinder (34; 61) that is closest to the at least one charging electrode unit (88; 103), and in that the charge core zone (89; 106) is arranged downstream of the contact zone (55) and upstream of the transfer point (101) leading away from the impression cylinder (34; 61), as seen in the direction of rotation (R) of the impression cylinder (34; 61).

5. Sheet-fed printing press according to claim 3 or according to claims 3 and 4, characterized in that at least one inspection system (97) is assigned to the coating unit (05; 06; 07), which inspection system has a camera (99) arranged in alignment with an inspection zone (98) assigned to the impression cylinder (34; 61), and in that the inspection zone (98) is arranged after the contact zone (55) and before the transfer point (101) leading away from the impression cylinder (34; 61), as seen in the direction of rotation (R) of the impression cylinder (34; 61).

6. Sheet-fed printing machine according to claims 4 and 5, characterized in that the charge core zone (89; 106) is arranged in front of the inspection zone (98) as seen in the direction of rotation (R) of the impression cylinder (34; 61).

7. Sheet-fed printing machine according to claim 1 or 2 or 3 or 4 or 5 or 6, characterized in that the discharge sheet transport means (69) is designed as a chain conveyor system (69) and that a chain section of a transport path provided for the transport of sheets (B) is defined by the chain conveyor system (69) and that the at least one first discharge electrode unit (123) of the at least one first discharge device (121) is arranged to act on the arch (B) in the chain section.

8. Sheet-fed printing machine according to claim 7, characterized in that the chain conveyor system (69) is assigned to a sheet delivery (08) of the sheet-fed printing machine.

9. Sheet-fed printing press according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8, characterized in that the sheet-fed printing press has at least one second discharge device (122) for removing electrostatic charge from sheets (B), which has at least one second discharge electrode unit (124) and in that a third distance (134) of the at least one second discharge electrode unit (124) of the second discharge device (122) from the rotation axis (129; 131) is greater than the second distance (133) of the transfer point (101) from the rotation axis (129; 131).

10. Sheet-fed printing press according to claim 9, characterized in that the at least one second discharge electrode unit (122) and / or its second discharge electrode (137) has a minimum distance of at least 10 mm from any earthed component of the sheet-fed printing press.

11. Sheet-fed printing machine according to claim 9 or 10, characterized in that the at least one first discharge electrode unit (123) is arranged closer to the transfer point (101) than the at least one second discharge electrode unit (124) of the at least one second discharge device (122).

12. Sheet-fed printing machine according to claim 7 and 9 or according to claim 7 and 10 or according to claim 7 and 11, characterized in that the at least one second discharge electrode unit (124) of the at least one second discharge device (122) is arranged to act on the arch (B) in the chain section.

13. Sheet-fed printing press according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10 or 11 or 12, characterized in that the at least one first discharge electrode unit (121) and / or its first discharge electrode (136) has a minimum distance of at least 10 mm from any earthed component of the sheet-fed printing press.

14. Sheet-fed printing machine according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10 or 11 or 12 or 13, characterized in that the feeding sheet transport means (34; 61) is arranged to be earthed via at least one earthing device (113).

15. Sheet-fed printing press, wherein the sheet-fed printing press has at least one coating unit (05; 06; 07) which has at least one impression cylinder (34; 61) and at least one further cylinder (33; 63) forming a contact zone (55) with the impression cylinder (34; 61), and wherein the coating unit (05; 06; 07) has at least one charging device (86; 102) for electrostatically fixing sheets (B) to the impression cylinder (34; 61), which has at least one charging electrode unit (88) aligned and / or alignable with a lateral surface (87) of the impression cylinder (34; 61), and wherein a charge core zone (89; 106) is a region (89; 106) of a cylinder barrel (91) of the impression cylinder, said region being closest to the at least one charging electrode unit (88). (34; 61) enveloping cylinder surface (92) and wherein the charge core zone (89) is in the direction of rotation (R) of the impression cylinder (34;61) is arranged after the contact zone (55) and in front of a transfer point (101) leading away from the impression cylinder (34; 61), and wherein the sheet-fed printing machine is at least; a discharge device (121; 122) for removing electrostatic charge from sheets (B), which has at least one discharge electrode unit (123; 124), characterized in that the impression cylinder (34; 61) is arranged to be earthed via at least one earthing device (113) and that the at least one discharge electrode unit (121; 122) and / or its discharge electrode (136; 137) has a minimum distance of at least 10 mm from any earthed component of the sheet-fed printing press.

16. Sheet-fed printing press according to claim 15, characterized in that the sheet-fed printing press has at least one discharge sheet transport means (35; 69) which, together with the impression cylinder (34; 61), forms the transfer point (101) leading away from the impression cylinder (34; 61), and in that the discharge sheet transport means (35; 69) has at least one gripper system (59; 109), and in that a provided movement path of the at least one gripper system (59; 109) of the discharge sheet transport means (35; 69) has, in sections at least in the region of the transfer point (101), the shape of a circular arc around a rotation axis (129; 131), and in that the at least one discharge device (121) is designed as an internal discharge device (121) for removing electrostatic charge from sheets (B), the at least one internal discharge electrode unit (123) of which has a distance (132) from the rotation axis (129';131) which is smaller than a distance (133) of the transfer point (101) from the rotation axis (129; 131); 17. Sheet-fed printing machine according to claim 16, characterized in that a region of the transport path provided for the transport of sheets (B) closest to the at least one charging electrode unit (88; 103) and / or the charge core zone (89; 106) along this transport path is arranged in front of a region of this transport path closest to the inner discharging electrode unit (123). is.

18. Sheet-fed printing machine according to claim 16 or 17, characterized in that a region of the transport path provided for the transport of sheets (B) closest to the inner discharge electrode unit (123) is arranged along this transport path after the transfer point (101) leading away from the cylinder (34; 61).

19. Sheet-fed printing machine according to claim 16 or 17 or 18, characterized in that the discharge sheet transport means (69) is designed as a chain conveyor system (69) and that a chain section of a transport path provided for the transport of sheets (B) is defined by the chain conveyor system (69) and that the at least one inner discharge electrode unit (123) of the at least one inner discharge device (121) is arranged to act on sheets (B) in the chain section.

20. Sheet-fed printing press according to claim 15 or 16 or 17 or 18 or 19, characterized in that the sheet-fed printing press has at least one discharge sheet transport means (35; 69) which, together with the impression cylinder (34; 61), forms the transfer point (101) leading away from the impression cylinder (34; 61), and in that the discharge sheet transport means (35; 69) has at least one gripper system (59; 109), and in that a provided movement path of the at least one gripper system (59; 109) of the discharge sheet transport means (35; 69) has, in sections at least in the region of the transfer point (101), the shape of a circular arc around a rotation axis (129; 131), and in that at least one outer discharge device (122) is designed as an outer second discharge device (122) for removing electrostatic charge from sheets (B), whose at least one outer discharge electrode unit (124) is at a distance (134) from the rotation axis (129;131) which is greater than a distance (133) of the transfer point (101) from the rotation axis (129; 131); 21. Sheet-fed printing machine according to claim 20, characterized in that along the transport path provided for the transport of sheets (B) after the transfer point (101) at least one sheet guiding device (127) with at least one sheet guiding element (128) is arranged and that the at least one outer discharge electrode unit (123; 124) is arranged on this at least one sheet guiding element (128).

22. Sheet-fed printing machine according to claim 20 or 21, characterized in that a region of the transport path provided for the transport of sheets (B) closest to the at least one charging electrode unit (88; 103) and / or the charge core zone (89; 106) along this transport path is arranged in front of a region of this transport path closest to the outer discharging electrode unit (123; 124).

23. Sheet-fed printing machine according to claim 20 or 21 or 22, characterized in that a region of the transport path provided for the transport of sheets (B) closest to the outer discharge electrode unit (124) is arranged along this transport path after the transfer point (101) leading away from the cylinder (34; 61).

24. Sheet-fed printing machine according to claim 20 or 21 or 22 or 23, characterized in that the discharge sheet transport means (69) is designed as a chain conveyor system (69) and that a chain section of a transport path provided for the transport of sheets (B) is defined by the chain conveyor system (69) and that the at least one outer discharge electrode unit (124) of the at least one outer discharge device (122) is arranged to act on sheets (B) in the chain section.

25. Sheet-fed printing press according to claim 15 or 16 or 17 or 18 or 19 or 20 or 21 or 22 or 23 or 24, characterized in that the coating unit (05; 06; 07) is assigned at least one inspection system (97) which has a camera (99) arranged aligned with an inspection zone (98) assigned to the impression cylinder (34; 61), and in that the inspection zone (98) is arranged after the contact zone (55) and before the transfer point (101) leading away from the impression cylinder (34; 61), as seen in the direction of rotation (R) of the impression cylinder (34; 61).

26. Sheet-fed printing machine according to claim 25, characterized in that the charge core zone (89) is arranged in front of the inspection zone (98) as seen in the direction of rotation (R) of the impression cylinder (34; 61).

27. Sheet-fed printing press according to claim 15 or 16 or 17 or 18 or 19 or 20 or 21 or 22 or 23 or 24 or 25 or 26, characterized in that at least one charging electrode (93; 104) of the at least one charging electrode unit (88; 103) has a minimum first distance (94) from the impression cylinder (34; 61) which is at least 4 mm and at most 13 mm and in that the at least one charging electrode (93; 104) of the at least one charging electrode unit (88; 103) has a minimum second distance (96) from the further cylinder (33; 63) which is at least 4 mm and at most 35 mm.

Images