Koenig & Bauer-aktiengesellschaft

Martin Lanig

Volkmar Rolf Schwitzky

Patrick Kress

Thomas Kersten

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

Device, method and printing press for multiple printing of printing substrate sheets

A device one of adjusts and changes a dampening medium profile, which extends in the direction of a printing width, in a printing unit comprising at least one printing unit cylinder, at least one inking unit which inks the printing unit cylinder, and at least one dampening unit which interacts with one of the printing unit cylinder and the printing unit. A drying device, which extends over the printing width, is provided with a number I(I&#x3b5;, 0&#x3e;1) of drying elements, the influence of which, on a printing unit surface to be treated, allows moisture to be removed from a number of n(n&#x3b5;, n&#x3e;1) axial portions a(j=1, . . . , n) that are offset relative to one another in the direction of the printing width. One of an extent of the influence of the drying device with respect to the axial direction (a) and the operating state of the drying device can be varied independently of one another. The drying elements are designed and arranged in the printing unit such that at least 20% of the width (b), when seen in the direction of the printing width, of multiple or all of the axial portions (a), which are designed as active portions (a) with an active width (b) of the drying elements in the printing unit, over the extension of those portions, overlaps with an adjacent axial portion of the axial portions (a), which are axially offset relative to one another in the direction of the printing unit. A controller and one of a switching and an adjusting device, which are connected to the controller for signaling purposes, are provided. The controller and the one of the switching and adjusting devices are used to operate multiple or all of the drying elements during a stationary active operating state such that each of the drying elements is pulsed, i.e. is individually clocked between an 'off' switching state and an 'on' switching state.

Device and method for adjusting and/or modifying a profile in the supply of dampening medium, extending in the direction of the printing width, and printing unit having a device for adjusting and/or modifying the profile

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Munich, Georgia

Martin Lanig