Sheet-fed printing press with charging and unloading equipment

Abstract

The invention relates to a sheet-fed printing press, wherein the sheet-fed printing press has at least one feeding sheet transport means and wherein the sheet-fed printing press has at least one charging device for electrostatically charging sheets, which has at least one charging electrode unit and wherein the sheet-fed printing press has at least one discharging sheet transport means which forms a transfer point leading away from the feeding sheet transport means with the feeding sheet transport means and wherein the discharging sheet transport means has at least one gripper system and wherein a provided movement path of the at least one gripper system of the discharging sheet transport means has, section by section at least in the area of ​​the transfer point, the form of a circular arc about an axis of rotation and wherein the sheet-fed printing press has at least one first discharge device for removing electrostatic charge from sheets.which has at least one first discharge electrode unit and wherein a first distance of this at least one first discharge electrode unit from the axis of rotation is smaller than a second distance of the transfer point from the axis of rotation.

Description

[0001] The invention relates to a sheet-fed printing machine with a charging device and a discharging device.

[0002] In sheetfed offset printing presses, sheets are coated with a coating material, 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, where the sheets interact directly with a forming cylinder and an impression cylinder. These are used, for example, as printing units or coating units. Depending on the properties of the coating material and the sheets, the sheets may adhere to the transfer cylinder or the forming cylinder. While the movement of the sheet's leading edge is largely determined by the grippers of the impression cylinder, the sheet's trailing edge can stretch considerably and / or detach from the impression cylinder. As soon as the trailing edge of the sheet leaves the contact zone, an abrupt release movement of the sheet can occur.The trailing edge of the sheet can even temporarily overtake its intended position on the cylinder circumference. This can negatively affect further sheet transport. However, it is particularly problematic when an inspection system is installed, past which the sheets are transported on the counter-pressure cylinder for inspection. The stretching and abrupt change in sheet position make evaluation, especially in the rear section of the sheet, difficult or impossible.

[0003] German patent DE 10 2008 001 165 A1 discloses a sheet-fed printing press in which a cylindrical surface is electrostatically charged and a sheet is then placed onto this surface. Printing and inspection then take place on this cylinder. An externally acting discharge device is arranged after a transfer point to a transfer unit.

[0004] DE 10 2019 118 565 A1 discloses a sheet-fed printing press which has unloading devices in the area of ​​sheet guide plates.

[0005] EP 2 574 463 B1 discloses a sheet-fed printing machine in which sheets lying on a cylinder are first electrostatically charged, then printed using an inkjet printhead and subsequently discharged while lying on the same cylinder.

[0006] The invention is based on the objective of creating a sheet-fed printing machine with a charging device and a discharging device.

[0007] The problem is solved according to the invention by the features of claim 1.

[0008] A sheet-fed printing press, for example a rotary sheet-fed printing press, is preferably assigned a transport path for transporting sheets. The sheet-fed printing press preferably has at least one infeed sheet transport means, for example at least one rotary transport body, in particular designed as a cylinder and / or impression cylinder, especially for transporting sheets. The sheet-fed printing press preferably has at least one outfeed sheet transport means, which, together with the infeed sheet transport means, forms a transfer point leading away from the infeed sheet transport means. Preferably, the sheet-fed printing press has at least one, in particular a first, charging device for electrostatically charging sheets, in particular for fixing sheets to the cylinder or impression cylinder, which preferably has at least one charge, in particular on a cylindrical surface of the cylinder or impression cylinder.The sheet-fed printing press has a first charging electrode unit aligned with and / or adjustable to the counter-pressure cylinder. The sheet transport means preferably has at least one gripper system. Preferably, a planned path of movement of the at least one gripper system of the sheet transport means has, at least in the area of ​​the transfer point, the form of a circular arc around a rotation axis, particularly one associated with the sheet transport means. The sheet-fed printing press preferably has at least one, and in particular a first, discharge device for removing electrostatic charge from sheets, which further preferably has at least one, and in particular a first and / or internal, discharge electrode unit.

[0009] The at least one discharge device is, for example, designed as an internal discharge device for removing electrostatic charge from the sheet. Preferably, the first distance of this at least one, and / or internal, discharge electrode unit from the axis of rotation, particularly associated with the sheet transport device, is smaller than the second distance of the transfer point from the axis of rotation, particularly associated with the sheet transport device. This has the advantage that a discharge of the top side of the sheet can be achieved. Furthermore, in conjunction with the charging electrode unit, it has the advantage that this discharge device can act on the side of the sheet that was previously acted upon by the charging device.In particular, this allows discharge in an area where the arcs do not rest on a surface, especially a grounded one, that would influence the electric field lines 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 would occur if the electric field lines were deflected by grounded components. Grounded components themselves are unsuitable for discharge due to the particles typically present, such as abrasion or dust.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 the sheet and whose at least one second and / or external discharge electrode unit has a distance, in particular a third, from the axis of rotation, in particular associated with the discharging sheet transport means, which is greater than the distance, in particular a second, of the transfer point from the axis of rotation, in particular associated with the discharging sheet transport means. An external discharge device allows discharge from a different side of the sheet and thus, if necessary, a two-sided and therefore particularly effective discharge.

[0010] In an alternative or additional further development, the sheet-fed printing machine is preferably characterized by the fact that the sheet-fed printing machine has at least one coating unit and that the feeding sheet transport means is designed as a counter-pressure 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 counter-pressure cylinder.

[0011] In an alternative or additional embodiment, the sheet-fed printing press is preferably characterized by the fact that the discharge sheet transport means is designed as a chain conveyor system, particularly for conveying sheets, and that a section of a transport path intended for transporting sheets is defined by the chain conveyor system, and further preferably 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, a sufficiently large distance between the first and / or inner discharge electrode unit and the discharge electrode unit can be advantageously maintained.The second and / or outer discharge electrode unit is located at grounded components. Such distances are, for example, at least 10 mm, preferably at least 15 mm, more preferably at least 20 mm, more preferably 25 mm, and more preferably at least 30 mm. This chain conveyor system is preferably assigned to a sheet delivery unit of the sheet-fed printing press. This allows for discharge as close as possible to the stacking process, ensuring proper stacking without unwanted adhesion due to electrostatic forces.

[0012] In an alternative or additional embodiment, the sheet-fed printing press is preferably characterized by the fact that a charge core zone, in particular a first one, is located in a region of a cylinder shell surface enclosing a cylinder core of the impression cylinder, closest to at least one, in particular a first charging electrode unit, and further preferably that the charge core zone is arranged downstream of the contact zone and upstream of the transfer point leading away from the impression cylinder when viewed in the direction of rotation of the impression cylinder. Preferably, the charge core zone, in particular a first one, is arranged along the transport path provided for sheet transport upstream of a region of this transport path closest to, in particular a first, discharge electrode unit. Thus, the sheets can be electrostatically charged at an optimized location.

[0013] Preferably, the first discharge electrode unit is arranged to act on a first main surface of the sheet from a first side of the transport path provided for sheet transport. More preferably, the first discharge electrode unit is arranged, at least temporarily, to act on this first main surface of the sheet. Preferably, the sheet-fed printing press has at least a second, in particular external, discharge device for removing electrostatic charge from sheets, which has at least a second, in particular external, discharge electrode unit. The second discharge electrode unit is preferably arranged to act on a second main surface of the sheet opposite the first main surface from a second side of this transport path.Preferably, the second discharge electrode unit is arranged, at least temporarily, to act on the second main surface of the sheet. Preferably, a section of the transport path intended for sheet transport, closest to the first discharge electrode unit, is arranged along this transport path downstream of the transfer point leading away from the cylinder. Preferably, a section of the transport path intended for sheet transport, closest to the first discharge electrode unit, is arranged along this transport path upstream of a section of this transport path closest to the second discharge electrode unit. This allows the first discharge electrode unit to be arranged relatively far forward along the intended transport path, resulting in an advantageously early start to the discharge of the sheets. The second discharge electrode unit can then also be arranged correspondingly far forward.Any residual charge that may still be present after the discharge electrode units have been used has more time to dissipate via the atmosphere on the way to the bow's placement.

[0014] In an alternative or additional embodiment, the sheet-fed printing press is preferably characterized by having at least a second, in particular outer, discharge device for removing electrostatic charge from sheets, which includes at least one, in particular a second and / or outer, discharge electrode unit. Preferably, a greater distance, in particular a third distance, of the at least one discharge electrode unit of the second and / or outer discharge device from the axis of rotation, in particular associated with the sheet transport mechanism, is greater than the greater distance, in particular a second distance, of the transfer point from the axis of rotation, in particular associated with the sheet transport mechanism. Preferably, a section of the transport path intended for sheet transport, closest to the second discharge electrode unit, is arranged along this transport path after the transfer point leading away from the cylinder.

[0015] In an alternative or additional further development, the sheet-fed printing machine is preferably characterized by the fact 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 embodiment, the sheet-fed printing machine is preferably characterized by the fact that a region of the transport path intended for transporting sheets, located along this transport path and closest to at least one, in particular, a first charging electrode unit, is arranged in front of a region of this transport path and closest to, in particular, a first discharge electrode unit, and / or that a region of the transport path intended for transporting sheets, located along this transport path and closest to at least one, in particular, a first charging electrode unit, is arranged in front of a region of this transport path and closest to the second discharge electrode unit, and / or that the region of the transport path intended for transporting sheets, located along this transport path and closest to the first discharge electrode unit, is arranged in front of the region of this transport path and closest to the second discharge electrode unit.

[0016] In an alternative or additional embodiment, the sheet-fed printing press is preferably characterized by the fact that the coating unit is assigned at least one inspection system, which has a camera arranged in a direction aligned with an inspection zone associated with the impression cylinder, and that the inspection zone is arranged downstream of the contact zone and upstream of the transfer point leading away from the impression cylinder when viewed in the direction of rotation of the impression cylinder. This allows for particularly precise positioning of the sheets during inspection. Preferably, the charge core zone is arranged upstream of the inspection zone when viewed in the direction of rotation of the impression cylinder. In conjunction with the at least one discharge device, this offers the advantage of being able to inspect sheets precisely and yet stack them precisely, because unwanted sticking together in an incorrect position is avoided.

[0017] Preferably, the feeding arc transport means is arranged to be grounded via at least one grounding device. This allows for particularly effective charging.

[0018] In an alternative or additional embodiment, the sheet-fed printing press is preferably characterized by the fact that at least one sheet guiding device with at least one sheet guiding element is arranged along the transport path provided for sheet transport after the transfer point. Preferably, at least one second and / or outer discharge electrode unit is arranged on this at least one sheet guiding element.

[0019] Exemplary embodiments of the invention are shown in the drawings and are described in more detail below.

[0020] They show: Fig. 1 a schematic representation of a sheet processing machine; Fig. 2 a schematic representation of a bow launcher and a bow installation; Fig. 3 a schematic representation of a substructure module of a printed work; Fig. 4 a schematic representation of a superstructure module of a printed work; Fig. 5 a schematic representation of a lacquer factory; Fig. 6 a schematic representation of a turning device; Fig. 7 a schematic representation of a sheet layout; Fig. 8 a schematic representation of part of a coating plant with charging equipment and downstream arc guiding element as well as discharge equipment; Fig. 9 a schematic representation of a first charging device according to Fig. 8; Fig. 10 a schematic representation of a cylinder with grounding device; Fig. 11 a schematic representation of a charging device with an electrode unit in its working position; Fig. 12 a schematic representation of a charging device with an electrode unit in its storage position; Fig. 13 a schematic representation of a second charging device according to Fig. 8; Fig. 14 a schematic representation of an enlarged section according to Fig. 8, where the areas of influence of the discharge devices are indicated; Fig. 15 a schematic representation of an enlarged section according to Fig. 14; Fig. 16 a schematic representation of a curved guide plate with comb fingers and external discharge device.

[0021] A sheet-fed processing machine, e.g., a sheet-fed processing machine, comprises at least one substrate feeder 01, for example, a sheet feeder 01, a processing unit 03, for example, a sheet feeder 03, and a substrate discharge unit 08, for example, a sheet delivery unit 08. Between the substrate feeder 01 and the substrate discharge unit 08, one or more processing units 05, 06, 07, also referred to as units, are arranged, for example, as a printing unit 05, 06, coating unit 07, drying unit, calendering unit, or foil transfer unit, or configured in another suitable manner. If the sheet-fed processing machine is configured 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, to which one or more coating units 07 are preferably arranged.In the case of multiple printing units 05, 06, the arrangement of one or more coating units 07 between the printing units 05, 06 may also be provided.

[0022] Unless explicitly stated otherwise, the term "sheet-shaped substrate B," in particular a printing material B, is intended to encompass any substrate B that is planar and exists in sections, including substrates B that are in sheet or plate form, i.e., sheets or plates. The sheet-shaped substrate B defined in this way is preferably made of paper or cardboard, i.e., as a paper or cardboard sheet, but can also be formed by sheets B, plates, or possibly plates made of plastic, cardboard, or metal.

[0023] The following section describes individual components of a sheet-fed processing machine using a sheet-fed printing press as an example.

[0024] For example, in Fig. Figure 2 shows a substrate feeder 01 designed as a sheet feeder 01, with a conveyor section 02 designed, for example, as a belt table 02, and with a substrate container 09 formed, for example, by a stack of sheets 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 of the sheet stack 09 is held in a defined position.

[0025] The substrate feed device 01, preferably designed as a sheet feeder 01, preferably comprises sheet singulation elements 12 and sheet transport elements 13. The sheet singulation elements 12 are, for example, designed as separating suction cups 12, and the sheet transport elements 13 are, for example, designed as transport suction cups 13, and are preferably jointly encompassed by a separating device 14, e.g., in a so-called sheet separator 14. A drive for the sheet separator 14 is designed such that the separating suction cups 12 perform a predominantly vertical movement, and the transport suction cups 13 perform a predominantly horizontal movement in or against a sheet transport direction 15. In one embodiment, separate drives are provided for the separating suction cups 12 and the transport suction cups 13.Individual drives are understood here to be controllable drives that are assigned to one or a group of working elements (sheet singulation elements 12 and / or sheet transport elements 13) for their drive, in particular for their drive independently of the drive (preferably all) of other working elements or groups of working elements, in particular without being coupled to drives of other working elements, individually or also in one or more groups, via a mechanical and / or positive locking drive connection.

[0026] Sheets B of the sheet stack 09 are positioned against stop elements 16, in particular with their leading edge against 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, for example, via a flap shaft 18 to which it is rotationally fixed, to a drive, preferably a single drive. 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 conveyor table 02. Blowing devices, e.g., so-called blowers, are preferably located on the rear of the sheet stack 09.Blowers are positioned to loosen the sheets B located in the upper part of the sheet stack 09 and to form an air cushion that supports the sheets B during conveying in the sheet transport direction 15. Additional blowing devices or blowers and / or guide plates may also be provided laterally to the sheet stack 09 for this purpose.

[0027] To prevent the sheet-fed printing press from stopping during the so-called "change" of the sheet stack 09, i.e., when reloading the substrate feeder 01 with new substrate sheets B, in particular a new substrate container 09, the sheet feeder 01 is equipped with a non-stop device (not shown here). This non-stop device includes, in particular, an auxiliary stack carrier, arranged on a feed unit, which can be moved into the stacking area of ​​the printing press and is designed, in particular, as a rack, roller, or plate. The auxiliary stack carrier takes over the remaining stack resting on a transport base 76, in particular a pallet 76, and preferably lifts it continuously to ensure the smooth singulation and removal of the uppermost sheet B of the remaining stack. During this time, the new stack, arranged on another pallet 76, is moved in, and subsequently the remaining stack is combined with the new stack.

[0028] The conveyor table 02 downstream of the sheet stack 09 is designed as a suction conveyor 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 conveying surface 22; 23, e.g., one- or multi-part, can be provided, which is formed, for example, by a one- 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 enclosed by at least one conveyor belt 24, which in the case of the suction conveyor table 02 is designed as a suction belt 24. The belt is tensioned, e.g., by means of a tension roller 77 and preferably driven within a working cycle by a belt drive acting, for example, on the drive roller 20, following a speed profile. Indexing rollers 25 correspond to the drive roller 20 and are controlled against the drive roller 20 within a working cycle.

[0029] The system 03, for example designated as 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. During the operating cycle, stops 27, in particular front stops 27, referred to as front marks 27, are guided to the feed table 26 and thus into the path of the sheets B. The sheets B are positioned and aligned with their leading edge against these front marks 27. A sheet accelerator 04, in particular designed as a vibrating gripper 04, is arranged downstream of the front marks 27. This gripper feeds the sheets B, aligned with their leading edge and optionally with a side edge, to a transfer drum 29 designed as a feed drum 29. The transfer drum 29 transfers the sheets B coming from the conveyor 02 to a printing cylinder 34 of the subsequent printing unit 05.

[0030] In another embodiment, the position of sheet B on the feed table 26 is measured. Sheet B is then transferred to the vibrating gripper 04 during its movement. Preferably, during the movement of the vibrating gripper 04, sheet B is then moved into its correct position and aligned before being transferred to the feed drum 29.

[0031] Works 05 and 06, in particular printed works 05 and 06, each have, for example, a substructure 31 designed, for example, as a substructure module 31. Of the printed works 05 and 06, in Fig. Figure 3 shows only the printing cylinders 34, 36, also referred to as counter-pressure cylinders 34, and the transfer cylinders 33, which transmit the printed image. These, together with the printing cylinders 34, 36, form printing zones 55, also referred to as printing points 55 or printing gaps 55. The transfer cylinders 33 are also referred to as rubber cylinders 33 or rubber blanket cylinders 33. The printing cylinders 34, 36 preferably have a continuous cylinder shell surface, except for at least one axially extending cylinder channel 56. A gripper system 57 for taking up and transferring sheets B is preferably arranged in the cylinder channel 56 in the gripper closure. Double-sized printing cylinders 33 therefore have two gripper systems 57, each arranged in a separate cylinder channel 56. Between the printing cylinders 34, 36, a transfer drum 35, designed as a transfer drum 35, is generally arranged with curved sheet support elements 58 arranged concentrically to the axis of rotation. B. so-called drum caps 58, arranged.Alternatively, the transfer drum 35 can also be designed without drum caps 58 as a so-called transferter 35. For transferring the sheets B from the upstream printing cylinder 34 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 under the transfer drum 35 and thus laid smoothly onto the drum caps 58. The transfer drums 35, transfer drums 35, or transferters 35 arranged between the printing cylinders 34 can be single-sized or multi-sized, but are preferably also double-sized. Single-sized cylinders can accommodate one sheet B, and double-sized cylinders can accommodate two sheets B circumferentially.

[0032] The works 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, in particular designed as a form cylinder 32, e.g. as a plate cylinder 32, and in an embodiment for the offset printing process, also a printing unit cylinder 32, in particular designed as a transfer cylinder 33, e.g. as a rubber 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 a printing cylinder 34 or impression cylinder 34 and a transfer drum 35, also referred to as a transfer drum 35.

[0033] The printing units 05, 06, as can be seen, for example, in the schematically depicted structure of the printing units 05, 06 in the figures, are preferably modular in design, in particular such that the upper printing unit structure 30 is formed by a first module 30, e.g., a so-called upper unit module 30, and the lower printing unit structure 31 by a second module 31, e.g., a so-called lower unit module 31. In the modular design, the upper unit module 30 comprises, for example, the printing cylinder 32 and, in an embodiment for the offset printing process, also the transfer cylinder 33. The lower unit module 31 includes, in particular, the printing cylinder 34 and, for example, the transfer drum 35. In this context, "modular" or "module" can be understood as a unit which, with its main components or at least their connecting elements, is pre-assembled in a frame and can be inserted into the machine as a whole and, if necessary,to be disassembled again, with the frame being designed as a frame that can be detached from the rest of the machine frame.

[0034] In the case of the modular design, the horizontal division between the upper module 30 and the lower module 31 preferably runs between the transfer cylinder 33 and the printing cylinder 34. The vertical dividing surface between the lower modules 31 or between the printing units 05, 06, viewed in the sheet transport direction 15, is predominantly located between the transfer drum 35 of the printing unit 05 and the printing cylinder 36 of the subsequent printing unit 06.

[0035] The transmission cylinder 33 mentioned above, 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 sheet. 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 sheet, are arranged, can be provided.

[0036] The transfer cylinder 33 is preceded, with respect to the direction of the effective ink flow, by the form cylinder 32, which is designed, for example, as a plate cylinder 32 and which also has, for example, at least one fastening device with a fastening element 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 clamping channel 39, in which, for example, at least one clamping and / or clamping device 40 for clamping a printing plate onto the outer surface of the plate cylinder 32 is located.

[0037] The printing unit 05, 06 can be assigned an automatic or semi-automatic plate changing device 41 in the area of ​​the printing unit superstructure 30 or superstructure module 30.

[0038] For inking the printing form, e.g., designed as a printing plate, at least one inking unit 42 is provided. The inking unit 42 can be designed as a short inking unit 42, as a lift inking unit 42, as a film inking unit 42, or in another suitable manner. In the case of the preferred design here as a lift inking unit 42, the inking unit 42 comprises at least one ink reservoir 43, which can be designed, for example, as a doctor blade or ink box 43, at least one ink intake roller 44 to be inked by the ink reservoir 43, designed, for example, as a ductor roller or, preferably, as an ink box roller 44, one or more further inking unit rollers 45, and preferably a lift roller 47, e.g., a so-called ink lifter 47, which oscillates between the ink intake roller 44 designed as an ink box roller 44 and a first inking unit roller 46. The inking unit rollers 45 differ, for example, in positively driven ink friction rollers 48 (in Fig. 4 (shown hatched) and in inking rollers 49, which are driven, for example, solely by friction from the inking rollers 48. In the exemplary embodiment, four inking rollers 50 are preferably provided to apply the ink prepared by the inking rollers 45 to the printing plate.

[0039] In the direction of rotation 53 of the plate cylinder 32 during operation, a dampening roller 52 is optionally arranged upstream of the inking rollers 50. This dampening roller is associated with 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 an inking roller 50, the first in the direction of rotation 53 of the plate cylinder 32, and the dampening roller 52. This functionally enables a connection between the dampening unit 51 and the inking unit 42. In the case of the switchable design, this allows for several operating modes to optimize the dampening solution supply.

[0040] The sheet-fed printing press can include a perfecting unit 78 for turning the sheets B to be printed. The perfecting unit 78 is preferably arranged between the printing units 05, 06 of the machine, in particular between the printing cylinders 34. This perfecting unit 78 is preferably configured so that it can be switched from front-facing to back-facing mode, so that the machine operates either in front-facing mode or in front-and-back-facing mode. Back-facing mode means that a sheet B is turned over after being printed by a number of printing units 05, 06 in order to print its reverse side with the subsequent printing units 05, 06.

[0041] The turning is usually done according to the principle of the back-edge turn (see e.g. Fig. 6) The turning device 78 can, for example, be configured as a three-drum turning unit or as a single-drum turning unit. In the three-drum turning unit, three sheet guide 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 around its circumference. A single-size cylinder thus has the same diameter as the forming cylinder 32 (e.g., designed as a plate cylinder 32), while a double-size cylinder has twice the diameter.

[0042] The turning drum 81 is equipped in particular with a turning gripper system 82, and the storage drum 80 is then equipped with at least one sheet holding system 83 per sheet-bearing surface. The sheet holding systems 83 are preferably designed as gripper systems 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 cup systems 84. The suction cup systems 84 are preferably connected to adjustable rear shell segments and adjustable circumferentially relative to the gripper systems 83 on front shell segments, so that sheets B of the maximum to minimum format can be held in the front and rear areas of the storage drum 80 in the operating mode of perfecting and / or in the operating mode of perfecting. Sheet guide elements for guiding the sheets B can be arranged below the storage drum 80 and / or turning drum 81.Furthering the turning device 78, a guide squeegee is assigned to guide the sheet B between the storage drum 80 and the turning drum 81.

[0043] The last printing unit 06 is, for example, followed by a coating unit 07. As shown, for example, in the drawings, a cylinder designed as a printing cylinder 61 or counter-pressure cylinder 34 is arranged in the base 31, e.g., within a base module 31. The counter-pressure cylinder 61 is preferably identical in construction to the counter-pressure cylinders 34, 36 of the printing units 05, 06.

[0044] 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 or 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 cylinder 63, is arranged, on which a transfer element, designed, for example, as a coating blanket or coating plate, is attached, for example, by means of a fastening system 64, e.g., a clamping and / or tensioning system 64. For applying the coating 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, comprising preferably an inking roller 66, in particular an anilox roller 66, having a cell structure on its outer surface, and a chambered doctor blade 67. The chamber doctor blade 67 contains two doctor blades that interact with the anilox roller 66.

[0045] A drying section is preferably provided downstream of the last printing unit 05, 06 or, if provided, after the coating unit 07. To form the drying section, one or more drying units 68 are arranged in the substrate path between the last unit 05, 06, 07 (designed as a printing or coating unit 05, 06, 07) and a product container 71 (e.g., formed by a delivery stack 71). Preferably, one or more drying units 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 units 68. If required, intermediate drying can also take place in the machine by drying units 68 assigned to the cylinders.This intermediate drying can also be carried out by a drying unit located in the machine.

[0046] The sheet delivery unit 08 of a sheet-fed printing machine, in particular a sheet-fed offset rotary printing machine, includes a sheet conveying system downstream of a sheet guiding system, here a sheet guiding cylinder, specifically a printing cylinder 34, which is designed in particular as a chain conveying system 69. The sheet conveying system includes traction elements moved by drive and deflection means, which drive gripping devices for sheet conveying. The gripping devices have fixing elements for taking and fixing the sheets B. In particular, clamping and / or suction grippers can be used as fixing elements for gripping the sheet edges. In further developments not shown, additional gripping devices for the trailing edges of the sheets are provided.

[0047] The sheet conveyor system 69, designed here as a chain conveyor system, comprises chains 73, driven by and mounted over sprockets 72, and guided in laterally arranged guide rails (not shown). Gripper carriages 70 are arranged on these chains for transporting the sheets B. The sprockets 72 are arranged, for example, to be rotatable about a rotation axis 129. For this purpose, they are connected, for example, to a sprocket shaft. From the gripper carriages 70, the sheets B are conveyed 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 surface. The gripper carriages 70 preferably contain respective gripper systems 109, in particular leading-edge clamping grippers, which have gripper fingers that interact with gripper supports. These gripper fingers are arranged at intervals from one another on a gripper shaft and are controllable by it.

[0048] For the safe 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 unit 68 is arranged in this area. The sheet guiding device 127 has at least one sheet guiding element 128 or sheet guide plate 128 facing the gripper carriages 70, which is preferably equipped with air nozzles and extends across the width of the machine. Preferably, several such sheet guide plates 128 are arranged. For example, air boxes 139 are arranged under the sheet guide plate 128, through which the air nozzles are supplied with compressed air, so that a cushion of air is formed between the sheet guide plate 128 and the sheets B transported by the gripper carriages 70. A coolant circuit can be integrated to control the heating of the at least one sheet guide plate 128 in the area of ​​the at least one drying unit 68.To prevent the sheets B from sticking together on the delivery stack 71, a release agent application device, in particular a powder device, preferably combined with a device for extracting the powder, is preferably provided in the area of ​​the sheet delivery 08.

[0049] In front of the delivery stack 71, an unspecified braking device is arranged to decelerate the sheets B released by the gripper carriages 70. The braking device may include rotating suction rings and / or circulating suction belts or be designed as a secondary gripper system. The sheets B, decelerated by the braking device, rest against front stops and are thus aligned and deposited onto the delivery stack 71. The delivery stack 71 is preferably lowered by a stack lift drive by the thickness of each sheet deposited, so that the stack surface maintains an approximately constant level.

[0050] To prevent the sheet-fed printing press from stopping when changing transport supports 76, e.g., pallets 76, the sheet delivery unit 08 can be equipped with a non-stop device (not shown). This device primarily comprises an auxiliary stacking support, for example, in the form of a rollable slatted table, also referred to as a roller blind. The roller blind has movably connected bars. In its rest position, it is coiled up in front of the delivery stack 71 and, for stack changes, is unrolled between two sheets B in the sheet transport direction 15 while the sheet-fed printing press is running, into a working position parallel to the surface of the delivery stack 71. In this position above the delivery stack 71, this slatted table temporarily receives the incoming sheets B, thus forming an auxiliary stack. The main stack can meanwhile be removed and replaced by a new transport support 76, in particular a pallet 76.At the end of the stack change process, the roller blind is retracted into its rest position and the auxiliary stack is placed on the new pallet 76.

[0051] The sheet-fed printing press is assigned at least one drive motor (not shown). In a first embodiment, this at least one drive motor is, for example, designed as a main motor and drives, for example, a closed train of wheels that forms a drive unit. The drive unit comprises, in particular, the printing cylinders 34, 36, the transfer drums 35, the transmission cylinders 33, the plate cylinders 32, and the inking units 42.

[0052] Individual functional units of the sheet-fed printing press, such as the substrate feeder 01, specifically the sheet feeder 01, the ink pickup roller 44, and / or any dampening units 51, 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 assembly comprising the main motor. In a further embodiment of the first design, at least the plate cylinders 32 are separated from the drive assembly and driven by separate drives, in particular individual drives, assigned only to the respective plate cylinder 32.The plate cylinders 32 are moved rotationally without a mechanical and / or positive drive connection to the drives of the other plate cylinders 32, to the drive assembly comprising the main motor, and to drives of other functional units such as the substrate feed device 01, the ink rollers 44, and / or the dampening units 51. The individual drives of the plate cylinders 32 can be formed, in particular, by so-called direct drives. A direct drive is understood to be an individual drive in which the drive motor or its rotor, preferably without intermediate gear elements, is connected directly or, if necessary, via a coupling in a coaxial arrangement to the drive shaft, in particular the journal, of the plate cylinder 32. The drive motor is preferably designed such that the interposition of a gearbox can be dispensed with.The circumferential speed of the plate cylinders 32 is adjusted to the circumferential 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 driving the drive assembly of the respective unit, but without being coupled to drives of other units via a mechanical and / or positive drive connection.

[0053] The sheets B are provided in the printing material container 09, which is designed, for example, as a sheet stack 09. The sheet separator 14 picks up the top sheet B of the sheet stack 09 and feeds it to further processing. This happens, for example, as follows: The sheet singulation devices 12 are guided against the top of the sheet stack 09, grasp the uppermost sheet B, and lift it from the sheet B below by returning to their starting position. The blowers under-blow the sheet B held by the sheet singulation devices 12, thus completely separating it from the sheet B below. The sheet B, held by the sheet singulation devices 12 and completely separated, is grasped by the sheet transport devices 13 and released by the sheet singulation devices 12. The sheet transport devices 13 convey the grasped sheet B in the sheet transport direction 15, whereby, at the start of sheet transport, the sheet flap 17 can be pivoted downwards so that the sheet B can be transported with its leading edge to the conveyor section 02, which is designed, for example, as a belt table 02.The indexing rollers 25 are initially lifted from the drive roller 20 and place themselves onto the respective sheet B when it is located in the gap between the indexing 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 track 02 (e.g., a belt table 02) while maintaining a predetermined shingle spacing. From this conveyor track, the sheets are guided against the front guides 27 during the working cycle of the sheet-fed printing press and can subsequently be pulled off by the sheet accelerators 04 (e.g., vibrating grippers 04).

[0054] The grippers, e.g., of the swing 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.

[0055] Sheet B, now located on printing cylinder 34, is inked by the inking unit 42 via the form cylinder 32 and, in the case of offset printing, via the transfer cylinder 33. This occurs, for example, as follows: The printing ink, stored in the ink reservoir 43 (e.g., in the ink box 43), is metered zone by zone onto the ink pickup roller 44 (e.g., ink box roller 44) and preferably deposited as ink strips by the periodically moving ink lifter 47 onto the first inking roller 46 (e.g., ink rub roller 48). This roller transfers the ink via friction-driven inking rollers 49 to the rub rollers 48. The ink is then transferred via further inking rollers 45 to the ink application rollers 50 and thus onto the printing plate mounted on the plate cylinder 32. Viewed in the direction of rotation of the plate cylinder 32, dampening fluid can be applied by the dampening roller 52 before the ink is applied by the ink application rollers 50.

[0056] The ink placed 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.

[0057] Sheet B is now transferred from the first printing unit 05 to the following printing unit 06 and, if necessary, subsequent printing units 05, 06. This happens, for example, as follows: 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 thus guided through the entire sheet-fed printing press. In the individual printing units 05 and 06, the ink is then applied to sheet B via the respective transfer cylinders 33.

[0058] As sheet B passes through the sheet-fed printing press, if a turning device 78 is present, the sheet B can also be turned over and printed on its reverse side. The operating principle of the sheet holding system described in the exemplary embodiment in the double-sided printing mode is, for example, as follows: The sheet B, printed in the facing direction and lying on the storage drum 80, is guided by the sheet holding system 83 in the area of ​​the sheet's leading edge and additionally fixed in the area of ​​the sheet's trailing edge by a sheet holding system 84, which is designed as a suction gripper of the suction system 84. After the sheet's leading edge has passed the point of tangency between storage drum 80 and the subsequent turning drum 81, it is released by the sheet holding system 83. While the sheet's trailing edge passes the point of tangency between storage drum 80 and 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 storage drum 80, so that the sheet's trailing edge then becomes the sheet's leading edge.

[0059] After sheet B has passed through printing units 05 and 06, it can be coated with a layer of varnish by the varnish cylinder 63 in one or more varnishing units 07. 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 unit 08.

[0060] The sheets B, gripped at their leading edge, are guided by the gripper carriages 70 after being taken from the printing cylinder 61 and passing through a deflection area, e.g., on an upward-pointing track. During this process, the sheets B are dried by the provided drying devices 68 and, for example, coated with powder. The sheets B are then transported by the gripper carriages 70 to the height of the delivery stack 71 and deposited there.

[0061] The sheet-fed printing press, in particular designed as a sheet-fed rotary printing press, preferably has at least one rotary transport body 34; 61 for transporting sheets B. A rotary transport body 34; 61 is understood to be, in particular, a rotatably arranged unit or assembly that serves to transport sheets B, especially around a rotational axis of the respective 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.

[0062] The sheet-fed printing press preferably has at least one coating unit 05; 06; 07, which is configured, for example, as a printing unit 05; 06 or as a coating 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, to the printing zone 55 in the case of a printing unit 05; 06. The at least one further cylinder 33; 63 forming the contact zone 55 with the impression cylinder 34; 61 is configured, for example, as a transfer cylinder 33 in the case of an offset printing unit 05; 06 or as a coating cylinder 63 in the case of a coating unit 07.

[0063] Preferably, the sheet-fed printing press has at least one charging device 86; 102 for electrostatically charging sheets B, which in particular comprises at least one charging electrode unit 88; 103. Preferably, the at least one charging device 86; 102 is designed for fixing sheets B to a sheet transport means 34; 61, for example, for fixing sheets 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 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 such charging device 86 for electrostatically charging sheets B, which preferably comprises at least one charging electrode unit 88.Preferably, the sheet-fed printing machine has at least a second such charging device 102 for electrostatically charging sheets B, which preferably has at least one, in particular a second, charging electrode unit 103.

[0064] The sheet-fed printing press therefore preferably has at least one charging device 86; 102 for electrostatically fixing sheets B to the rotary transport body 34; 61. Preferably, the coating unit 05; 06; 07, which is designed in particular as a printing unit 05; 06 or coating unit 07, has the 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; 103 aligned and / or alignable with a cylindrical surface 87 of the impression cylinder 34; 61.

[0065] The first charging electrode unit 88 preferably comprises at least one first charging electrode 93, optionally several. The second charging electrode unit 103 preferably comprises at least one second charging electrode 104, optionally several. While details are described below using a rotary transport body 34; 61 or sheet transport means 34; 61 designed as a counter-pressure cylinder 34; 61, these details are nevertheless transferable to general rotary transport bodies 34; 61 or sheet transport means 34; 61, provided no contradictions arise. In particular, the charging electrode unit 88; 104 is generally aligned and / or alignable to a lateral surface 87 of a rotary transport body 34; 61 and is preferably movable between at least two positions.

[0066] A respective charge core zone 89; 106 is preferably a region 89; 106 of a cylinder shell surface 92 enclosing a cylinder core 91 of the cylinder 34; 61, which is designed in particular as a counter-pressure cylinder 34; 61, 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 shell surface 92 enclosing the cylinder core 91 of the counter-pressure cylinder 34; 61, closest to the at least one first charging electrode unit 88. The respective charge core zone 89; 106 is preferably arranged downstream of the contact zone 55 and / or upstream of a transfer point 101 leading away from the cylinder 34; 61, which is designed in particular as a counter-pressure cylinder 34; 61, when viewed in the direction of rotation R of the counter-pressure cylinder 34; 61. The transfer point 101 is in particular the place where a change of the grippers of the participating sheet transport means 34; 35; 61; 69, 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 sheets B and, in particular, for fixing sheets B to the cylinder 34; 61, which is designed, in particular, as a counter-pressure 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 a counter-pressure cylinder 34; 61. A second charge core zone 106 is then a region 106 of the cylinder outer surface 92 enclosing the cylinder core 91 of the counter-pressure 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 in the direction of rotation R of the counter-pressure cylinder 34; 61 after the contact zone 55 and before the transfer point 101 leading away from the counter-pressure cylinder 34; 61 and preferably after the first charge core zone 89.

[0067] 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 head 91 of the counter-pressure cylinder 34; 61. The closer to the contact zone 55 this fixing 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 or at least partially renew or maintain the fixing generated by the first charging electrode unit 88. This is relevant, for example, if charge carriers can be transported away through the sheets B via the counter-pressure cylinder 34; 61.

[0068] The respective at least one first and / or second charging electrode unit 88; 103 is preferably arranged to be movably positioned between at least two positions. One of the at least two positions is a working position. Preferably, the other of the at least two positions is a storage position. The working position is, in particular, a position that the respective charging electrode unit 88; 103 assumes during printing and that serves to enable the respective charging electrode unit 88; 103 to act on sheet B. The storage position is, in particular, a position that the respective charging electrode unit 88; 103 assumes for maintenance or cleaning and / or to create more space between the charging electrode unit 88; 103 and the rotary transport body 34; 61 or counter-pressure cylinder 34; 61.The storage position can serve, on the one hand, for maintenance and / or assembly and / or cleaning of the charging electrode unit 88; 103 or parts thereof. However, the storage position preferably alternatively or additionally has the function of increasing the distance between the rotary transport body 34; 61, preferably designed as a counter-pressure cylinder 34; 61, on the one hand, and the at least one charging electrode unit 88; 103 on the other, particularly compared to a situation in which the at least one charging electrode unit 88; 103 is arranged in its operating 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 rotating 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.

[0069] Preferably, the at least one charging electrode unit 88; 103 is pivotably 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 effective side 107, which, when the charging electrode unit 88; 103 is arranged in the working position, faces the rotating transport body 34; 61, and, when the charging electrode unit 88; 103 is arranged in the storage position, faces away from the rotating 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 accessible from the outside only from one direction. This direction then determines the effective side 107.The at least one charging electrode 93; 104 preferably has areas with particularly small radii of curvature on its surface, which are further preferably designed as needles 108. These needles 108 are preferably arranged on the effective side 107. At these areas, especially the needles 108, the corresponding electric field strength is particularly high and allows for a particularly effective charging of the arcs B.

[0070] The respective charging electrode unit 88; 103 is arranged in its operating position with a relatively small distance to the counter-pressure cylinder 34; 61. If material of excessive thickness is carried along with the counter-pressure 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 the respective charging electrode unit 88; 103 to passively move out of position.

[0071] Preferably, particularly when a first charging electrode unit 88 is arranged in its operating 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 counter-pressure 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 operating position, at least one first charging electrode 93 of the at least one first charging electrode unit 88, for example several and particularly 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.The operating voltage of the charging electrode unit 88, whether applied or applicable, 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 operating voltage of the charging electrode unit 88, whether applied or applicable, 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 operating voltages are preferably DC voltages. The same applies preferably to the distances and / or voltages of the at least one second charging electrode unit 103 and its second charging electrodes 104.

[0072] Preferably, the sheet transport means 34; 61 or rotary transport body 34; 61, preferably designed as a cylinder 34; 61 and in particular as a counter-pressure cylinder 34; 61, is arranged 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 means of 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 head 91.

[0073] Preferably, the coating unit 05; 06; 07, which is configured 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, in particular with respect to its detection range, in an inspection zone 98 assigned to the impression cylinder 34; 61. For example, a lighting device is additionally and / or integrated. This inspection zone 98 is preferably arranged after the contact zone 55 and / or before the transfer point 101 leading away from the impression cylinder 34; 61, viewed in the direction of rotation R of the impression cylinder 34; 61. The camera 99 is preferably configured as a high-resolution camera 99 and is preferably part of a system for detecting and / or controlling registers and / or color values ​​and / or printed image content. This camera 99 is arranged, for example, in the transport direction after a last printing unit 06 and / or after a last coating unit 07.In particular, when the charging electrode unit 88; 103 is arranged in its working position, the charge core zone 89; 106 is preferably arranged in the direction of rotation R of the counter-pressure cylinder 34; 61 in front of the inspection zone 98 and preferably after the contact zone 55.

[0074] 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 forming cylinder 32 and / or at least one coating cylinder 63 are connected to this machine control system. For example, this higher-level machine control system is connected to a control station of the sheet-fed printing press. Preferably, the at least one charging device 86; 104 is connected to the higher-level machine control system of the sheet-fed printing press. For example, the at least one charging device 86; 104 has a high-voltage generator that is connected to the at least one charging electrode unit 88; 103 and / or the at least one charging electrode 93; 104.For example, at least one charging device 86; 102 is connected to the higher-level machine control of the sheet-fed printing machine in such a way that the high-voltage generator is connected to the higher-level machine control of the sheet-fed printing machine in such a way.

[0075] For example, the at least one charging device 86; 102 is connected in such a way that the application of the operating voltage to the at least one charging electrode 93; 104 begins at the earliest with the start of a sheet feed and / or ends at the latest with the end of the sheet feed. This means, in particular, that the at least one charging device 86; 102 is connected to the higher-level machine control of the sheet-fed printing press in such a way that the operating voltage intended for operation is only applied to the at least one charging electrode 93; 104 when the sheet feed is activated.Preferably, the at least one charging device 86; 102 is connected to the higher-level machine control of the sheet-fed printing machine 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 machine, in particular designed as a machine control station or touch-sensitive display device.

[0076] Preferably, at least one position sensor 126 is arranged. This position sensor 126 serves in particular to check whether the respective charging electrode unit 88; 103 is in its operating 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 to the higher-level machine control system via a circuit. If the position sensor 126 detects an evasive movement of the respective charging electrode unit 88; 103 when the sheet feeder is activated, the machine control system can initiate a stop of the sheet-fed printing press.

[0077] Preferably, the at least one charging device 86; 102 is assigned to a coating unit 05; 06; 07, for example, the last coating unit 05; 06; 07 along the transport path provided for the transport of sheets B. Thus, the corresponding, for example, last coating unit 05; 06; 07 preferably has at least one charging device 86; 102 for electrostatically fixing sheets B to the counter-pressure cylinder 34; 61, which has at least one charging electrode unit 88; 103 aligned and / or alignable with a lateral surface 87 of the counter-pressure cylinder 34; 61, in particular at least one first charging electrode unit 88. This is preferably designed as described above and / or below. In particular, the charge core zone 89 is preferably oriented in the rotational direction R of the counter-pressure cylinder 34; 61 seen after the contact zone 55 and in front of the transfer point 101 leading away from the counter-pressure cylinder 34; 61 arranged.

[0078] Preferably, the sheet-fed printing press has at least one discharge device 121; 122 for removing electrostatic charge from sheets B. For example, at least one first discharge device 121 and at least one second discharge device 122 are arranged. Preferably, the at least one first discharge device 121 is arranged along the transport path provided for transporting sheets B upstream of the at least one second discharge device 122. Preferably, the at least one first discharge device 121 is designed as an internal discharge device 121. Preferably, the at least one second discharge device 122 is designed as an external 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 internal discharge device 121 has at least one, in particular, first or...inner discharge electrode unit 123 and / or has at least one second or outer discharge device 122, in particular at least one second or outer discharge electrode unit 124.

[0079] The at least one discharge device 121; 122 serves, for example, to remove and / or neutralize charge carriers adhering to sheet B. The at least one discharge device 121; 122 serves, in particular, to remove and / or neutralize charge carriers arranged on sheet B by means of the at least one charging device 86; 102. Accordingly, preferably a region of the transport path provided for the transport of sheet B nearest to the at least one charging electrode unit 88; 103 and / or the first and / or the second charge core zone 89; 106 along this transport path is arranged upstream of a region of this transport path nearest, in particular, the first discharge electrode unit 123 and / or upstream of a region of this transport path nearest to the second discharge electrode unit 124.Preferably, the area of ​​the transport path intended for the transport of arc B that is closest to the first discharge electrode unit 123 is arranged along this transport path in front of the area of ​​this transport path that is closest to the second discharge electrode unit 124.

[0080] The at least one discharge device 121; 122 is preferably operated with alternating current. 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 from any grounded component, in particular of the sheet-fed printing press, 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. Preferably, the at least one second or outer discharge electrode unit 124 and / or its second or inner discharge electrode 136 has a minimum distance of at least 10 mm from any grounded component, in particular of the sheet-fed printing press, of at least 15 mm, more preferably at least 20 mm, more preferably 25 mm, and more preferably at least 30 mm.The 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 the sheet-fed printing machine.

[0081] For example, along the transport path intended for the transport of sheets B, between the respective charging electrode unit 88; 103 of the at least one charging device 86; 102 and the respective discharging electrode unit 123; 124 of the at least one discharging device 121; 122, at least one transfer point 101 is arranged. 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 discharging electrode unit 123; 124 of the at least one discharging device 121; 122 can be carried out in such a way that grounded components have a sufficiently large distance from the discharging device 121; 122.In particular, the area of ​​the transport path intended for the transport of sheet B 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 intended for the transport of sheet B 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.

[0082] The sheet-fed printing press preferably has at least one infeed sheet transport means 34; 61 and at least one outfeed sheet transport means 35; 69, which together with the infeed sheet transport means 34; 61 forms the transfer point 101 leading away from the infeed sheet transport means 34; 61, which is in particular a transfer point 101 for transferring sheets B from the infeed sheet transport means 34; 61 to the outfeed sheet transport means 35; 69. This infeed 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 offset cylinder 34; 61. This outfeed sheet transport means 35; 69 is, for example, designed as a chain conveyor system 69, in particular for conveying sheets B, in particular as the chain conveyor system 69 of the sheet delivery 08. (This is also shown by way of example in Fig. (8 shown.) Alternatively, this discharge 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 rotate about a respective axis of rotation 131. (This is shown by way of example in Fig. 3 shown, with at least one additionally in Fig. 3. Not shown, corresponding charging device and / or at least one in Fig. (3 inspection device not shown.) The feeding sheet transport means 34; 61 preferably has at least one gripper system 57, more preferably two in the circumferential direction. The discharging sheet transport means 35; 69 preferably has at least one gripper system 59; 109, in particular for holding sheets B.

[0083] A planned movement path of the at least one gripper system 59; 109 of the discharge sheet transport means 35; 69 preferably has, at least in the area of ​​the transfer point 101, the form of a circular arc around a rotation axis 129; 131, which is particularly associated 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.

[0084] Preferably, the at least one first discharge device 121 is designed as an internal discharge device 121. Preferably, the sheet-fed printing press, and in particular its preferably first discharge device 121 for removing electrostatic charge from sheets B, has at least one first discharge electrode unit 123 designed as an internal discharge electrode unit 123. Then, a distance 132, in particular, of this at least one first discharge electrode unit 123 from the axis of rotation 129; 131, which is associated in particular with the discharging sheet transport means 35; 69, is smaller than a distance 133, in particular, of the transfer point 101 from this axis of rotation 129; 131, which is associated in particular with the discharging sheet transport means 35; 69. Preferably, a chain section of the transport path provided for the transport of sheets B is 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 arc B in the chain section. This action preferably takes place only in a part of the chain section.

[0085] Preferably, at least the coating plant 05; 06; 07 preceding the transfer point 101 is designed as a coating plant 05; 06; 07 for applying coating material 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.

[0086] Alternatively or in addition to an internal discharge device 121, preferably at least one external discharge device 122 is arranged, in particular as a second discharge device 122 in addition to the first discharge device 121.

[0087] The sheet-fed printing press preferably has at least one first discharge device 121 for removing electrostatic charge from sheet B, which includes at least one first, in particular internal, 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, for example, referred to as the top, since it is located in a spatial region that is substantially above the transport path. The first discharge electrode unit 123 is preferably arranged, at least temporarily, to act on a first main surface of sheet B. A main surface is understood to be the 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 from a second side or bottom of this transport path opposite the first main surface onto a second main surface of sheet B opposite the first main surface. The second discharge electrode unit 124 is preferably arranged, at least temporarily, to act on the second main surface of sheet B.

[0088] 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 distance 134, in particular a third distance, of the at least one second or outer discharge electrode unit 124 of the second or outer discharge device 122 from the axis of rotation 129; 131, which is particularly associated with the sheet transport means 35; 69, is greater than the distance 133, in particular a second distance, of the transfer point 101 from the axis of rotation 129; 131, which is particularly associated with the sheet transport means 35; 69. 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 along the transport path provided for the transport of sheet B.

[0089] As described, the sheet-fed printing press preferably has at least one sheet guiding device 127 in the area of ​​the sheet delivery 08, which, for example, has at least one sheet guiding element 128, in particular designed as a sheet guide plate 128. Thus, preferably, at least one sheet guiding device 127 with at least one sheet guiding element 128 is arranged along the transport path provided for the transport of sheets B after the transfer point 101. Furthermore, preferably, at least one second and / or outer discharge electrode unit 123; 124 is arranged on this at least one sheet guiding element 128.

[0090] For example, a sheet guide device 127 is arranged in the area of ​​one or more or all coating units 05; 06; 07 and / or in the area of ​​the sheet delivery 08 below the transport path provided for the transport of sheets B. For example, at least one such sheet guide device 127 is arranged along the transport path provided for the transport of sheets B after the transfer point 101. The respective sheet guide device 127 preferably has a sheet guide plate 128. Such a sheet guide plate 128 is preferably designed as a metallic sheet guide plate 128, which extends in particular over the width of the machine. Preferably, such a sheet guide plate 128 has comb fingers 138, particularly in an area facing the counter-pressure cylinder 34; 61. Along the transport path provided for the transport of sheets B, the comb fingers 138 are preferably each closed by an outer or innerA second discharge device 122 or discharge electrode unit 124 is connected, wherein the comb fingers 138 of the sheet guide plate 128 are made, in particular, partially or completely of metallic material. For example, the comb-shaped areas of the respective sheet guide element 128 are provided with blowing air openings and, in particular, can be switched to blowing air, so that a pneumatic force acting on the sheets B can be generated in these areas. Preferably, the sheets B are therefore peeled from the outer surface of the upstream counter-pressure cylinder 34; 61 by the pneumatically acting comb fingers 138.

[0091] A sheet guide element 128, in particular a sheet guide plate 128, located below a sheet conveying system, especially a transfer drum 35, can consist of a single sheet or be composed of several sections. For example, an upstream section can form a first area and a downstream section a second area for sheet guidance. A first section or sheet can, for example, extend from the outer surface of the counter-pressure cylinder 34; 61 to a vertical position below the axis of rotation of the transfer drum 35. A second section or sheet can extend along the conveying path to the outer surface of the downstream counter-pressure cylinder 34; 61. A corresponding external and / or second discharge device 122 or discharge electrode unit 124 is, for example, associated with the first section of the sheet guide element 128.Preferably, the outer and / or second discharge device 122 or discharge electrode unit 124 forms an arc guide surface of the arc guide device 127 in its arrangement area. In particular, at least one fan 139 can be assigned to an arc guide element 128, especially an arc guide plate 128, which can be controlled, in particular, for generating blowing and / or suction air.

[0092] Preferably, the downstream section or second area of ​​the sheet guide element 128, in particular the sheet guide plate 128, is configured concentrically to the axis of rotation 129; 131 of the discharging sheet transport means 35; 69 with respect to the intended transport path. In the case of a transfer drum 35, the sheet guide surface of the second section of the sheet guide element 128, in particular the sheet guide plate 128, is preferably configured concentrically around the axis of rotation 131 of the transfer drum 35. In the case of a chain conveyor system 69, the sheet guide surface of the second section of the sheet guide element 128, in particular the sheet guide plate 128, is preferably configured concentrically around the axis of rotation 129 of the corresponding at least one sprocket 72. For example, the first section of the sheet guide element 128, in particular the sheet guide plate 128, has in theFrom the area of ​​the counter-pressure cylinder 34; 61, a sheet guide surface continuously approaches the axis of rotation 129; 131 of the discharging sheet transport means 35; 69. The sheet guide element 128 is then spirally shaped. In particular, regardless of whether it is formed as segments, the sheet guide element 128 preferably has a greater distance from the axis of rotation 129; 131 of the discharging 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 guide element 128 further downstream along the intended transport path. For this purpose, the sheet guide element 128 is, for example, spirally shaped or flat (i.e., in particular, straight in cross-section) in its entry area.

[0093] Preferably, an 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, in the case of provided comb fingers 138, it 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 approximately 5° of the discharging sheet transport means 35; 69. The respective discharge device 122 or discharge electrode unit 124 can be directly connected 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 axis of rotation 129 continuously along the intended transport path. 131 of the outgoing bow transport means 129; 131 on.

[0094] The at least one outer and / or second discharge device 122 or discharge electrode unit 124, for example, comprises a cassette with at least one discharge electrode 137 arranged in the sheet guide plate 128. Preferably, the cassette can be recessed into the sheet guide plate 128 below a sheet conveying system and may also have several, preferably identical, discharge electrodes 137. The cassette is preferably arranged downstream of the comb fingers 138, which are preferably made of metal, and a guide surface section can also be formed upstream between the comb fingers 138 and the cassette. For example, the comb fingers 138 facing a counter-pressure cylinder 34; 61 contain, spaced apart from each other, finger elements, which are preferably made of metal, and between which the movable gripper fingers of respective gripper systems 111 can be guided.

[0095] Below the sprocket shaft of the chain conveyor system 69 of the sheet delivery unit 08, in particular between the sprockets 72, a sheet guide element 128 is arranged, which is preferably designed as a sheet guide plate 128 extending across the width of the machine and arranged between the side walls. This sheet guide plate 128 preferably has a surface that is at least approximately closed for sliding and / or floating guidance of the sheets B. The sheet guide plate 128 can be provided with a paint-repellent coating. Furthermore, nozzle openings, in particular Venturi nozzles, for pneumatic guidance of the sheets can be assigned to the sheet guide plate 128. In the area of ​​the counter-pressure cylinder 34; 61, the sheet guide plate 128 is preferably spaced further away from the axis of rotation 129 of the sprocket shaft or the sprocket 72 than the areas of the sheet guide plate 128 that follow 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 counter-pressure cylinder 34; 61. In particular, the sheet guide plate 128 in the sheet delivery 08 is designed to be 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.

[0096] The respective discharge device 121; 122 or discharge electrode unit 123; 124 preferably includes 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 to the higher-level machine control of the sheet-fed printing press via a circuit such that the high-voltage generator is connected to the higher-level machine control of the sheet-fed printing press via a circuit.

[0097] Preferably, the insulators 141 of the discharge device 121; 122 or discharge electrode unit 123; 124 are arranged transversely to the intended transport path, preferably across the entire width of the arc guide plate 128, and have surfaces arranged perpendicular to the intended transport path or to the arc guide surface of the arc guide plate 128. Preferably, each discharge electrode 136; 137 is arranged here, in particular, between two insulators 141. An insulator 141 located forward of the intended transport path preferably connects with its perpendicular or tangential surface to the comb fingers 138, which are preferably metallic. Following the discharge device 121; 122 or discharge electrode unit 123; 124, the arc guide plate 128 preferably connects directly to a perpendicular or tangential surface of a rear insulator 141, or, with respect to the intended transport path, to the last insulator 141.

[0098] Preferably, each discharge electrode unit 123; 124 has an alternating arrangement of a positively ion-emitting and a negatively ion-emitting electrode tip, which can operate with or without compressed air assistance.

[0099] Preferably, the influence can be applied to arc B where it remains free of ion-binding contact with grounded machine parts on both its upper and lower surfaces. This advantageously allows the ions to pass into the activated, deionizing ambient air with minimal obstruction. Reference symbol list 01 Substrate feeder, arc feeder 02 Conveyor line, belt table, suction belt table 03 Plant setup, arch system 04 Arc accelerator, vibrating gripper 05 Processing stage, coating plant, printing plant, first 06 Processing stage, coating plant, printing plant 07 Processing stage, coating plant, paint plant 08 Substrate dispensing device, sheet delivery 09 Packaging of printing material, stacks of sheets 10. Receiving device, stacking plate 11 means of transport 12 sheet separating device, separating vacuum cleaner 13 sheet transport elements, transport suction cups 14 Separating device, arc separator 15 Bow transport direction 16 stop elements, front stops 17 Arch flap 18 flap shaft 19 - 20 Roller, drive roller 21 Roller, deflection roller 22 Conveyor surface, table plate 23 Conveyor area, suction box 24 Conveyor belt, suction belt 25-beat roll 26 Laying table, lashing plate 27 Stop, front stop, front marks 28 - 29 Transfer drum, feed drum 30 Printing mechanism superstructure, module, first, superstructure module 31 Printing unit substructure, module, second, substructure module, substructure 32 printing cylinders, form cylinders, plate cylinders 33 printing cylinders, transmission cylinders, rubber cylinders 34 Sheet transport devices, cylinders, printing cylinders, printing cylinders, counter-pressure cylinders, rotary transport bodies 35 Transfer drum, transfer drum, transferter 36 printing cylinders, printing cylinders, counter-pressure cylinders 37 Channel, clamping and / or clamping channel 38 Fasteners, clamping and / or tensioning devices 39 Channel, clamping and / or clamping channel 40 Fasteners, clamping and / or clamping devices 41 Plate changing device 42 Coloring unit, lifter coloring unit, short coloring unit, film coloring unit 43 paint supplies, paint box 44 Ink pickup roller, ink box roller 45 inking rollers 46 first inking roller 47 Lifting roller, paint lifter 48 positively driven ink rollers 49 inking rollers, driven by friction 50 ink application rollers 51 Humidification system 52 Dampening roller 53 Direction of rotation of the forming cylinder 54 Bridge roller 55 Pressure zone, pressure point, pressure gap 56 cylinder ports 57 Gripper system of the pressure cylinder 34 58 arch support elements, drum caps 59 Gripper system (35) 60 air cushion guide 61 Sheet transport devices, cylinders, printing cylinders, printing cylinders, counter-pressure cylinders, rotary transport bodies 62 Paint shop superstructure, superstructure module of the paint shop 63 paint shop cylinders, paint mold cylinders 64 Fastening system, clamping and / or tensioning system 65 Application system, chambered doctor blade system 66 Inking roller, anilox roller 67 squeegees, chamber squeegees 68 Drying equipment 69 Chain conveyor system 70 Gripping device, gripper trolley 71 display stacks, product packages 72 sprocket 73 chain 74 - 75 Guide track 76 transport pad, pallet 77 Tension roller 78 Turning device 79 Bow guide cylinders, transfer drum 80 arc guide cylinders, storage drum 81 Bow guide cylinders, reversing drum 82 Turning grab system 83 Bow holding system, gripper system 84 Bow holding system, suction system 85 - 86 Charging device, first 87 Surface area (34; 61) 88 Charging electrode unit, first 89 Charge core zone, first area 90 - 91 cylinder bales (34; 62) 92 Cylindrical surface area (34; 62) 93 Charging electrode, first 94 distance, minimal, first 95 - 96 distance, minimal, second 97 Inspection system 98 Inspection Zone 99 Camera 100 - 101 Handover point 102 Charging device, second 103 Charging electrode unit, second 104 Charging electrode, second 105 - 106 Charge core zone, second area 107 Side of action (88) 108 needles (93) 109 Gripper system (69) 110 - 111 Gripper system (61) 112 Carbon brush 113 Earthing device 114 Swivel axis 115 - 116 Lever arm 117 Spring element 118 Slip ring 119 cases (88) 120 - 121 Discharge device, first, inner 122 Discharge device, second, outer 123 Discharge electrode unit, first, inner 124 Discharge electrode unit, second, outer 125 - 126 Sensor, proximity switch 127 Bow guidance device 128 Curved guide element, curved guide plate 129 Rotation axis (72) 130 - 131 Rotation axis (35) 132 gap, first 133 gap, second 134 gap, third 135 - 136 Discharge electrode, first, inner (123) 137 Discharge electrode, second, outer (124) 138 comb fingers 139 fans, blower box 140 - 141 Insulator B Substrate, printing material, sheet E Electrode swivel axis R direction of rotation QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2008 001 165 A1

[0003] DE 10 2019 118 565 A1

[0004] EP 2 574 463 B1

[0005]

Claims

[1] Sheet-fed printing press, wherein the sheet-fed printing press has at least one feeding 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 has at least one charging electrode unit (88; 103) and wherein the sheet-fed printing press has at least one discharging sheet transport means (35; 69) which, together with the feeding sheet transport means (34; 61), forms a transfer point (101) leading away from the feeding sheet transport means (34; 61), and wherein the discharging 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 discharging 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 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 by 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 bythat the sheet-fed printing press 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 has at least one further cylinder (33; 63) forming a contact zone (55) with the impression cylinder (34; 61). [4] Sheet-fed printing machine according to claim 1 or 2 or 3, characterized by that the removing 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 sheets (B) in the chain section. [5] Sheet-fed printing machine according to claim 4, characterized bythat the chain conveyor system (69) is assigned to a sheet delivery (08) of the sheet-fed printing press. [6] Sheet-fed printing machine according to claim 3 or 4 or 5, characterized by 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 that the charge core zone (89; 106) 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). [7] Sheet-fed printing machine according to claim 1 or 2 or 3 or 4 or 5 or 6, characterized bythat 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 that a third distance (134) of the at least one 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). [8] Sheet-fed printing machine according to claim 7, characterized by that the at least one second discharge electrode unit (124) of the at least one second discharge device (122) is arranged to act on sheets (B) in the chain section. [9] Sheet-fed printing machine according to claim 7 or 8, characterized bythat 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). [10] Sheet-fed printing machine according to claim 3 or 4 or 5 or 6 or 7 or 8 or 9, characterized by that at least one inspection system (97) is assigned to the coating unit (05; 06; 07), which has a camera (99) arranged so as to be aligned with an inspection zone (98) assigned to the impression cylinder (34; 61), and that the inspection zone (98), viewed 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). [11] Sheet-fed printing machine according to claim 10, characterized by 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). [12] 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, characterized by 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. [13] 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, characterized by 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. [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 bythat the feeding sheet transport means (34; 61) is arranged to be earthed via at least one earthing device (113).

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