Abstract: A device (14) for production of printing forms is integrated into a control desk (4) which has operating and display elements (20, 21) for the control of operating processes of a printing press (2, 3). The device can be used in print shops in which production of printing forms and printing itself are closely linked on the basis of operation sequences.

Abstract: Method of optimizing a reproduction of a picture copy includes scanning a picture copy optoelectrically for generating scanning signals, in accordance with the scanning signals, electronically screening the picture copy and inscribing a recording medium so that one of a plurality of screen fields on the recording medium corresponds to one or more scanning signals of the picture copy, forming each of the screen fields, respectively, of a plurality of elementary cells, and determining relative locations of the elementary cells so that a region of overlap between an inscribed and an adjacent non-inscribed elementary cell, respectively, is minimal.

Abstract: Printing unit for a rotary offset printing press having a plate cylinder bearing a printing plate suitable for offset-printing operation free of dampening solution, and an inking unit with a multiplicity of inking rollers for inking the printing plate during operation with a printing ink suitable for offset-printing operation free of dampening solution includes an auxiliary roller bringable, independently of the inking rollers, into engagement with and out of engagement from the printing plate, the auxiliary roller, at least in a first operating position thereof wherein it is in engagement with the printing plate, being rotatable opposite to the direction of rotation of the plate cylinder at a circumferential speed different from the circumferential speed of the plate cylinder and, in a second operating position thereof wherein it is out of engagement with the printing plate, forming a component or constituent part of the inking unit.

Abstract: Drive for a printing press having a plurality of printing units having plate cylinders, elements for transporting stock, and elements which do not transport stock includes a gear-transmission device for interconnecting the printing units, a plurality of motors, respectively, coupled at various locations to the gear-transmission device, a device for controlling and regulating delivered power connected to the motors, and a device for feeding signals regarding rotational speed in the gear-transmission device to the control and regulating device, the gear-transmission device including a gear-transmission unit for driving all of the stock-transporting cylinders and the plate cylinders; at least one of the motors being connected to the gear-transmission unit; at least one sensor for detecting motion variables in the gear-transmission unit; at least one drive for driving the elements of the printing press which do not transport stock; at least another sensor for detecting motion variables in the drive for driving th

Abstract: A device for movably positioning in a plurality of positions a magazine for automatically changing printing plates in a printing machine for changing the printing plate of the plate cylinder, replacing the printing plates of the magazine, servicing the printing machine and normal operation, includes a device for mounting the magazine, including a vertical guide wherein the magazine is displaceable, and a horizontal shaft about which the magazine is swivelable, and drive devices for displacing and swiveling the magazine.

Abstract: A device for aftertreating a material web, coated or printed on at least one side thereof, having a drier for heating the material web to vaporize solvents contained therein, a vapor channel connected to the drier and traversible by the material web, and an arrangement of cooling rollers located downstream of the vapor channel, each of the cooling rollers being enveloped by the material web over a region of the circumference of the cooling rollers, respectively, a first one of the cooling rollers located in the travel direction of the material web having a jacket surface thereof facing towards the coated or printed side of the web includes a doctor blade device having a transversing doctor blade engaging a region of the first cooling roller located between an oncoming strand and a departing strand of the material web.

Abstract: A device for feeding a paper web to a cross cutter which is located downstream from a rotary printing machine in a travel direction of a paper web and which delivers cut sections of the paper web in flat disposition includes draw rollers and a former disposed downstream from the rotary printing machine for respectively tensioning and folding the paper web in longitudinal direction thereof, additional draw rollers and register rollers located downstream from the first-mentioned draw rollers and the former in the travel direction of the paper web for feeding the longitudinally folded paper web to a cross cutter, and a folding apparatus disposed adjacent to the cross cutter downstream from the rotary printing machine in the travel direction of the paper web, the cross cutter and the folding apparatus being formed as separate units.

Abstract: A printing unit cylinder of a given diameter for offset rotary printing machines having a galvanically applied wear and corrosion-resistant jacket surface coating, comprising a cylinder body formed with a cylinder channel and having a transitional surface from a cylindrical jacket surface thereof to the cylinder channel, the cylindrical jacket surface and the transitional surface having a sand-blasted surface roughness of 10 to 20 microns, a nickel undercoating having a hardness of 180 to 220 Vickers hardness disposed on the cylindrical jacket surface and the transitional surface; and a chromium layer disposed on the undercoating and having a hardness of greater than 900 Vickers hardness and a microcracked surface of greater than 400 cracks per cm.sup.2, the cylinder body having a diameter less than the given diameter of the printing unit cylinder by a thickness corresponding to the superimposed thicknesses of the nickel chromium and the chromium layer.

Abstract: A device for determining and adjusting the position of a web, the device having two sensor units each with a respective light source element directed towards the web and a respective photoelectric sensor element responsive to reflected light, a control unit responsive to respective output signals of the two sensor units, and a device connected to the control unit and fed by an adjusting signal from the control unit for adjusting the position of the web, including reflectors disposed at a side of the web facing away from the sensor units and projecting beyond respective opposite edges of the web, one of the two elements of one of the sensor units being directed towards one of the opposite edges of the web and the other of the two elements of the one of the sensor units being directed to a reference surface, the other of the two elements of the other sensor unit being directed towards the other of the opposite edges of the web and the other of the two elements of the other sensor unit being also directed to a r

Abstract: Device for controlling with adjusting members and a measuring device the lateral position of a web in a web printing machine, the controlling device, for effecting centralized control, having respective optical scanning systems for detecting edges of the web on both sides thereof and the respective positions of the edges and, upon lateral shifting of the web, activating the adjusting members for correcting the position of the web in accordance with a nominal value, including a respective bandpass filter connected to each of the optical scanning systems, and means for detecting a long-term change in the control signal by the bandpass filter of one of the optical scanning systems, the one optical scanning system being in position yet being idle with respect to controlling the lateral position of the web, the other optical scanning system being active with respect to scanning the respective web edge for controlling the lateral position of the web, the detection of the long-term change in the control signal by th

Abstract: Inking unit for a printing machine includes an ink duct, a ductor roller having a surface engageable with ink received in the ink duct, an ink transfer roller for transferring ink from the ductor roller to other rollers, a ductor knife engageable along the length thereof with the surface of the ductor roller and adjustable in position relative to the surface of the ductor roller in zones extending along the length of the ductor knife for controlling the amount of ink to be transferred, and means for adjusting the zones of the ductor knife pulse-like into engagement with and disengagement from the surface of the ductor roller with strokes of equal length and with a stepwise variable stroke time.

Abstract: Ink fountain for printing machines includes an elongated ink knife forming the base of the fountain, a fountain roller forming a side of the fountain, and means for zonewise adjusting the thickness of a film of ink on the fountain roller, the ink knife having a wiper edge adjacent the fountain roller for wiping ink therefrom, and being bent along the length thereof in direction toward the fountain roller at a location in vicinity of the wiper edge, the bent portion of the ink knife adjacent the wiper edge having an end face opposite to the fountain roller and adjustable in the spacing thereof relative to the fountain roller, the space defined by the bent ink knife and the fountain roller having a defining streamlined surface facilitating a return flow of the ink wiped from the fountain roller.