Man Roland Druckmaschinen Ag

Claus Walter

Christian Schlegel

A control system for a printing press in which a central computer is interfaced to a plurality of printing units through peripheral units located near the press units. The central unit utilizes digital signals to address particular peripheral units and to select control functions at the selected peripheral unit. The controlled functions in the press units provide analog feedback signals which are to be sensed by the central computer. A multi-function bus comprising both analog and digital sections couples the central computer to the peripheral units. The integrity of the analog feedback signals on the bus is maintained by assuring that the digital signals on the bus are maintained in a quasi-steady condition during intervals when the central computer is evaluating analog feedback signals on the analog section of the bus.

Digital computer system with analog feedback for a printing press control

A system (and related method) for coordinating electronic zonal control of a printing press to a hard copy image of the printed form. The system supports a hard copy image in register with an optical source which projects an optical mark onto the image. The optical mark is traversed to selected points on the image. The zonal control information is stored in electronic memory means and can be displayed on an electronic display. Neither the electronic display nor the electronic memory have means for storing the actual image pattern. The electronic display has means for displaying a cursor and traversing the cursor across the displayed zone-by-zone information. The system provides means for translating coordinate information from the optical mark projected onto the hard copy image and controlling the cursor position on the electric display so as to correlate image positions from the hard copy with control zone information in the electronic display.

Method and apparatus for coordinating a printing press control with a

A system and a method for making fountain adjustments in a printing press. A press control panel has a plurality of key pairs for bidirectionally controlling associated fountain adjusters, and the system provides for zonal adjustment by defining zones which include a plurality of fountain adjusters and simultaneously adjusting all of the adjusters in a defined zone. A zone definition begins by detection of simultaneous actuation of both keys in a pair, and a zone is defined by actuation of a further key, the zone encompassing all adjusters lying between the actuated key pair and the further key. After definition of a zone, all of the adjusters in a zone are controlled by operation of one or two keys in the zone. Flexibility is provided to adjust all adjusters in the same direction and by the same amount, or to interpolate adjustments between adjusters.

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Glauburg, Germany

Claus Walter