KOENIG & BAUER AG

A gravure printing unit is provided by which substrate can be printed according to a gravure printing method. The gravure printing unit has a forme cylinder, which comprises, on its circumference, an image-forming pattern of recesses, and has an inking unit by which the pattern of recesses provided on the forme cylinder can be at least partially inked. The forme cylinder can be partially inked from an inking device via a first inking unit cylinder, which has, in the region of its lateral surface, recesses that correspond to recesses on the forme cylinder, and via a second inking unit cylinder, which is to be partially inked by the first inking unit cylinder. To produce an image element to be used for checking a relative position between the forme cylinder and the first inking unit cylinder, the forme cylinder has, within the printing width but preferably outside of an image-forming pattern of recesses that supplies the print image of one or more N-up copies, and lying in a circumferential region, at least one first recess, which overlaps on the forme cylinder only partially with a projection, which is obtained on the forme cylinder by the rolling off, in pairs in each case, of the inking unit cylinders that are involved in the ink transport, of a recess, which is provided in a defined position and location on the circumference of the first inking unit cylinder for the purpose of checking the relative position. A substrate section and a method for checking and/or adjusting and/or correcting a relative position between the first inking unit cylinder and the forme cylinder are also disclosed.

A method for separating printed products, that are printed together onto a sheet of printed products, is disclosed. The printed products are printed onto a sheet in a printing press and are separated in a cutting system by a cutting device. Each of these printed products has an identification feature that identifies its respective position on the sheet. The sheet becomes deformed as it passes through the printing press. The separated printed products, which are likewise deformed, as a result of the deformation of the sheet, are inspected, in a quality control device which is located downstream of the cutting system, for compliance with the tolerance, at least with regard to the respective length or width of the printed products. For each printed product that has been identified, in terms of its position, the quality control device detects information relating to an exceeding of the tolerance, at least for the length or width of the printed product, and transmits that information, assigning that information to the position identified on the sheet, to a control unit of the cutting system. Based on the information transmitted by the quality control device, for printed products that are arranged in the same position on the sheet, and which will subsequently be separated in the cutting system, the control unit of the cutting system adjusts the relevant sheet and the cutting device in their respective positions, relative to one another, in such a way that each of the printed products to be separated complies with the respective tolerance. Compliance with the tolerance is achieved in that the position of the sheet and of the cutting device to be adjusted relative to one another is calculated in the control unit using a mathematical optimization method. The sheet is placed on a cutting table in the cutting system. The control unit of the cutting system adjusts the position of the sheet relative to the cutting device, according to the calculated position.

The invention relates to a sheet processing machine ( 01 ), comprising at least one infeed unit ( 200 ) and at least one shaping unit ( 300 ) and at least one stripping unit ( 400 ) and at least one multiple-up separating unit ( 500 ), wherein the sheet processing machine ( 01 ) comprises at least one drive ( 1001 ), wherein the at least one drive ( 1001 ) is configured to drive at least one stripping tool ( 402; 403 ) of at least one stripping mechanism ( 401 ) of the at least one stripping unit ( 400 ) and at least one multiple-up separating tool ( 502 ) of at least one multiple-up separating mechanism ( 501 ) of the at least one multiple-up separating unit ( 500 ) via at least one gear mechanism ( 1007 ), wherein at least one downstream gear mechanism ( 1019 ) is arranged downstream from the at least one gear mechanism ( 1007 ), wherein the at least one downstream gear mechanism ( 1019 ) is coupled to the at least one stripping tool ( 402; 403 ) of the at least one stripping unit ( 400 ) and/or to the at least one multiple-up separating tool ( 502 ) of the at least one multiple-up separating unit ( 500 ), wherein the at least one downstream gear mechanism ( 1019 ) is configured to convert at least one rotative movement into at least one reciprocating movement, wherein the at least one downstream gear mechanism ( 1019 ) is configured as a disk cam mechanism ( 1019 ). The invention likewise relates to a further sheet processing machine ( 01 ) and to a method for driving at least one tool ( 402; 403; 502 ) of a sheet processing machine ( 01 ).

An application unit includes an application mechanism with an impression cylinder, a forme cylinder, a supply roller, and a positioning device. The positioning device has a linear guide and a main supporting member, which is arranged to be movable in a positioning direction, guided by the linear guide, and is arranged rotatably on the main supporting member by a rolling bearing. The positioning device has a transfer supporting member, which is arranged to be movable in the positioning direction relative to the main supporting member, guided by the linear guide. On the transfer supporting member, a component of a bearing seat is provided, and which is configured to receive a rolling bearing arranged on the supply roller. The positioning device has a reservoir supporting member, which is arranged to be movable in the positioning direction, both relative to the main supporting member and relative to the transfer supporting member, guided by the at least one linear guide. An intermediate reservoir for application fluid is arranged on the reservoir supporting member. The reservoir supporting member is arranged, at least partially, between the main supporting member and the transfer supporting member as viewed in the positioning direction.

A gravure printing unit is usable for printing onto substrate according to a gravure printing method. The gravure printing unit has a forme cylinder, which comprises, on its circumference, an image-forming pattern of recesses, and has an inking unit for inking the pattern of recesses provided on the forme cylinder. The inking unit comprises a first inking unit cylinder, which comprises recesses in a region of its outer cylindrical surface that correspond to the recesses on the forme cylinder, and which form a nip point downstream with a second inking unit cylinder, which comprises, on its circumference, ink-transferring elevations or raised areas. The recesses are formed on the outer cylindrical surface of an ink transfer forme sheath. The first inking unit comprises a cylinder body which is or which can be mounted rotatably in the inking unit and on which a circumferentially closed ink transfer forme sheath, that carries the recesses of the first inking unit cylinder on its outwardly facing surface, is or can be detachably arranged. A printing press has such a gravure inking unit. A setting up method, an ink transfer forme sheath, and a method for producing the same are also disclosed.

A flexographic printing press for printing a substrate web comprises at least one printing unit and at least one central cylinder. A plurality of printing couples are arranged around the periphery of the at least one central cylinder. A horizontally aligned dryer unit, having at least one guide element, is arranged above the printing unit in a vertical direction. The at least one horizontally aligned dryer unit has at least two dryer sections with one dryer section being arranged separated from the next dryer section by at least one diverting assembly. The at least one flexographic printing press has at least one roll unwinder and at least one roll winder. The at least one roll unwinder and the at least one roll winder are arranged on opposite sides of the at least one central cylinder.

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.

A sheet-fed printing unit has a first impression cylinder and a second impression cylinder, which are arranged directly and interactingly in contact and which each have an axis of rotation. An axial plane contains the axes of rotation. A reference plane is a plane which contains an axis of rotation of a cylinder of this type and has a horizontal surface normal. These two cylinders are arranged such that an intersection angle between the axial plane and the reference plane is a maximum of 15°. A transport path is provided for a transportation of sheets, which transport path has a region for the respective impression cylinder in which there is contact between sheets and a casing surface. This region of the transport path for the respective impression cylinder extends over an angular range of at least 270°. A sheet-fed printing machine has a sheet-fed printing unit of this type.

A printing press has at least one printing unit that comprises one or more printing couples, by the use of which printing press, sheet-format substrate can be printed on at least one side in at least one printing nip. The printing press has at least one product receiving unit, in which the printed sheet-format substrate can be collected to form bundles of products or intermediate products. A rotatable cooling cylinder, for guiding or conveying the sheet-format substrate, is located upstream of the product receiving unit in the substrate path. At least one first electrode is arranged on, and is directed towards the substrate path section that runs over a circumferential section of the cooling cylinder. When an electric voltage is applied to the substrate path, substrate being guided along the substrate path past the electrode is or can be electrostatically charged.

A sheet delivery unit has at least one rear sheet stop. The sheet delivery unit has at least one forward stack limiter. The sheet delivery unit has at least one upper sheet transportation system, designed for hanging transportation of sheets, with at least one imbrication device for the imbricated, hanging transportation of at least two sheets. A sheet processing machine is also disclosed. A method is disclosed for operating a sheet processing machine. Processed substrate in the form of a sequence of sheets spaced apart from one another in a transportation direction, is supplied in this transportation directed to a sheet delivery unit of the sheet processing machine. At least during a sheet braking procedure, at least at times, at least two sheets are guided in a hanging manner by the use of an upper sheet transportation system, configured for the hanging transportation of sheets, of the sheet delivery unit, and are transported in an imbricated arrangement at least also in the transportation direction.