KOENIG & BAUER AG

A sheet processing machine has at least one shaping device and at least one sheet delivery unit, arranged downstream of the at least one shaping device along a transport path provided for a transport of sheets. The at least one shaping device has at least one shaping point which is formed by at least one forme cylinder, on one hand, and at least one impression cylinder, on the other hand. At least one separation device, for removing scrap pieces from sheets, is arranged downstream of the at least one shaping point along the transport path provided for the transport of sheets. The at least one separation device has at least one separation transport device. At least one transport device, configured as a selective transport device, is arranged following the at least one separation transport device along the transport path provided for the transport of sheets. The transport device is configured as at least one upper suction transport device for a hanging transport of sheets.

The invention relates to a device for printing sheets of printing substrate ( 02 ), having a first printing nip ( 12 ) which is formed between a first cylinder ( 19; 19 *) that acts as a transport cylinder ( 19; 19 *) and a second cylinder ( 18 ), and in which the printing substrate sheets ( 02 ) can be printed on one or on both sides with one or more collected print image segments, and having a second printing nip ( 11 ) lying downstream in the printing substrate path, which printing nip is disposed at a level lying below the first printing nip ( 12 ) and is formed between a third cylinder ( 17 ) that acts as a transport cylinder ( 17 ) and a fourth cylinder ( 16 ), and in which the printing substrate sheets ( 02 ) can be printed on one or on both sides with one or more collected print image segments, wherein the printing substrate sheets ( 02 ) can be conveyed via at least one rotating transport means ( 33; 38; 39 ) along a transport path from the cylinder ( 19; 19 *) that acts as a transport cylinder ( 19; 19 *) of the first printing nip ( 12 ) to the cylinder ( 17 ) that acts as a transport cylinder ( 17 ) of the second printing nip ( 11 ), wherein on the transport path, downstream of the cylinder ( 19; 19 *) that acts as a transport cylinder ( 19; 19 *) of the first printing nip ( 12 ) and upstream of the cylinder ( 17 ) that acts as a transport cylinder ( 17 ) of the second printing nip ( 11 ), at least one first electrode ( 37; 41 ) directed toward the outer circumference of the at least one rotating transport means ( 33 ) is arranged in an angular segment lying in the transport path for the printing substrate sheets ( 02 ) in such a way that when an electric voltage is applied, a printing substrate sheet ( 02 ) being guided past the electrode ( 37; 41 ) can be electrostatically charged.

A sheet-fed printing machine comprises two sheet-fed printing units; of which a first is configured as a sheet-fed simultaneous printing unit and has two collector cylinders, which interact with one another and each have an axis of rotation. An axial plane contains the axes of rotation of the collector cylinders. A reference plane contains an axis of rotation of this type and has a horizontal surface normal. An intersection angle between the axial plane and the reference plane is, at a maximum, 45 degrees. A first one of the sheet-fed simultaneous printing units has exactly four plate cylinders, of which exactly two are arranged such that they directly interact with the first collector cylinder and has exactly two others which are arranged such that they directly interact with the second collector cylinder. A second sheet-fed printing unit has at least one impression cylinder and at least one plate cylinder, which is arranged such that it directly interacts with the impression cylinder and which is configured a screen printing plate cylinder, or as a flexo plate cylinder or as a numbering plate cylinder. The two collector cylinders of the first printing unit and the impression cylinder of the second printing unit have the same circumference.

A roller for a printing unit of a printing press, has a roller outer body, which is mounted on a roller inner body, so as to be movable axially in a reciprocating manner. For the axial movement of the roller outer body, in at least a first direction, a pneumatic drive is provided. The pneumatic drive has at least one first chamber, which is mounted in the interior of the roller in the manner of a cylinder/piston system between one or more structural elements, that are fixed to the roller outer body, and one or more structural elements that are fixed to the roller inner body. The chamber can be pressurized with compressed air. The parts of the structural elements adjoining the chamber, and that are movable axially relative to one another, form a non-contact seal between themselves on their mutually facing sides.

A printing press and a method for producing security products or security intermediate products comprises a feed device for feeding unprinted printing substrate into the printing press. Multiple printing couples print the unprinted printing substrate in an indirect planographic or in a letterpress printing method in one or more printing nips. In a conveyor line, between the feed device and the first printing nip located in the printing substrate path, at least one inspection device, which is embodied as a transmissive inspection device, is provided for inspecting the as yet unprinted printing substrate.

A gravure printing unit, which is usable for printing on a substrate, according to a gravure printing method, includes a forme cylinder which comprises, on its circumference, an image-forming pattern of recesses, and an inking unit, by the use of which the pattern of recesses provided on the forme cylinder is inked. The forme cylinder can be partially inked from an inking device via a first inking unit cylinder which has recesses in the region of its outer cylindrical surface that correspond to recesses on the forme cylinder, and via a second inking unit cylinder, which cooperates with the first inking unit cylinder and which comprises ink-transferring elements or raised areas on its circumference. For controlling the transfer of ink, the first inking unit cylinder having the recesses, is configured as being temperature controllable or has a temperature control device in the ink unit supply. Alternatively, a printing pressure between inking units cylinders can be varied during operation. The invention also relates to a method for adjusting or modifying a transfer of ink and for operating the gravure printing unit.

An application unit comprises an application mechanism with an impression cylinder, a forme cylinder, and a supply roller, along with a positioning device and a magazine for supply rollers, which magazine is located below the application mechanism. The magazine has magazine receptacles for supply rollers and a movable repositioning device, by the use of which, the magazine receptacles can be placed in different magazine positions. One of the magazine positions is a change position, and when a magazine receptacle is located in that change position, a supply roller can be transferred, with respect to a positioning direction, between the magazine receptacle and a remote region of a roller positioning path that connects the magazine to the application mechanism. The positioning direction deviates no more than 45 degrees from a vertical direction. One of the magazine positions is a loading position, and when a magazine receptacle is located in the loading position, a supply roller can be transferred along a loading path with respect to a loading direction, between the magazine receptacle and a loading area. The loading direction deviates no more than 30 degrees from at least one horizontal direction.

An application unit includes an application mechanism having an application cylinder, a forme cylinder, and a supply roller, along with a positioning device. The positioning device has a linear guide and the application unit has a magazine for supply rollers, preferably located below the application mechanism, the magazine having magazine receptacles each for receiving one supply roller. The magazine has a repositioning device, by the use of which the magazine receptacles can be placed in different magazines positions. By the use of the positioning device, a supply roller can be moved along a linear roller positioning path, one end of which is identical to a supply position and the other end of which is identical to a magazine position of the magazine that is configured as a change position. The positioning device preferably has at least one transfer supporting member, which is arranged to be movable in and counter to a positioning direction relative to the frame of the flexographic application mechanism, guided along the at least one linear guide, and on which at least one component of a bearing seat can be arranged, which is configured to receive a rolling bearing arranged on the at least one supply roller.

The invention relates to a drying unit ( 22 ) for drying printed substrates ( 21 ), comprising a chamber ( 23 ) with a gaseous medium which is oxygen-reduced by means of an inert gas, wherein the substrates ( 21 ) are guided through the chamber ( 23 ) or at least can be guided through the chamber, and the chamber ( 23 ) has an entrance for the substrates ( 21 ) to be guided into the chamber ( 23 ) in the transport direction (T) of the substrates ( 21 ). The entrance for the substrates ( 21 ) to be guided into the chamber ( 23 ) is formed by two cylinders ( 04; 06 ) which are positioned against each other longitudinally. The cylinders ( 04; 06 ) positioned against each other at the entrance of the chamber ( 23 ) form a printing unit ( 03 ). One of the cylinders ( 04 ) is designed as a printing cylinder ( 04 ), and the other cylinder ( 06 ) is designed as a cylinder ( 06 ) which interacts with the printing cylinder ( 04 ) and applies a printed image onto the affected substrates ( 21 ). The two cylinders ( 04; 06 ) which are positioned against each other under pressure at the entrance of the chamber ( 23 ) form a seal which runs axially to the cylinders ( 04; 06 ) for preventing the oxygen-reduced gaseous medium from leaking out of the chamber ( 23 ) and/or for preventing oxygen from the ambient air from entering the chamber ( 23 ). The printing unit ( 03 ) arranged at the entrance of the chamber ( 23 ) is designed as a printing unit ( 03 ) for an intaglio printing process.

Please add the Abstract of the Disclosure, as set forth on the separate accompanying sheet. This Abstract of the Disclosure is essentially the same, in content, as the Abstract which is a part of the published PCT application, WO 2020/074135 A1. No new matter is being presented by the addition of this Abstract of the Disclosure.