Man Roland Druckmaschinen Ag

Man Roland Druckmaschinen

M.a.n.-roland

Manroland Ag

Marco Bergmann

Herbert Rebel

Andreas Lippold

Roland Holl

Joachim Olek

Andreas Luder

Michael Dipl-Ing Reising

Uwe Prof Dr-Ing Bäsel

A method and an apparatus for cleaning a rotating cylinder of a rotary printing machine. The apparatus having a washing device, including a washing brush, roller, or cloth, which can be engaged and disengaged from the rotating cylinder to be cleaned. The washing brush roller or cloth can be sprayed with a cleaning fluid (detergent, water) as well as both water. The method and apparatus ensure a controlled guiding of the detergent onto the outer surface of the rotating cylinder, which guarantees an effective cleaning and, at the end of the washing operation, leaves a relatively dry outer surface of the rotating cylinder. The cleaning method is intended to be suitable, in particular, for detergents having a biological base, for example, esters of vegetable oil. Effective cleaning and drying with minimal waste is achieved in that the washing device is controlled, depending on fixed angular settings, with a washing cycle or a drying cycle, giving due regard to the rotary speed and direction of rotation of the respective rotating cylinder to be cleaned. The apparatus for carrying out the cleaning method essentially comprises an angle generator which is connected to a controller which, in turn, is coupled to the washing device, specifically, the operating cylinders and the spraying nozzles.

Method and apparatus for cleaning a cylinder of a rotary printing machine

A washing apparatus for cleaning the surface of cylinders in a printing machine includes a fresh-cloth roller, a washing roller and a dirty-cloth roller. A washing cloth is transported from the fresh-cloth roller via the washing roller to the dirty-cloth roller. A spring-band freewheel in the form of a helical coil spring is wound non-positively on the shaft of the fresh-cloth roller. The spring-band freewheel free-wheels during the rotation of the shaft in the direction of tension applied to the washing cloth and blocks the shaft from rotating in the opposite direction. The necessary cloth tension is guaranteed, at the same time, by means of the resilient effect of the spring-band freewheel.

Washing apparatus for printing press cylinders having a spring-band

A blanket cylinder is covered by a blanket having ends secured by spindles in a wide gap extending parallel to the central axis of the cylinder. The cylinder includes a cover rail having a substantially mushroom-shaped cross-section disposed along the length of the gap. The cover rail is attached to the base of the gap so that the cover rail bears against the blanket secured on the spindles and sealing material is provided between the end walls of the cylinder and the adjacent surfaces of the cover rail.

Gap cover for blanket cylinders in sheet-fed offset rotary presses

A sheet transfer conveyor for rotary sheet feed printing press comprising a pair of chains which support and transport a plurality of gripper carrying trolleys which successively engage the leading edge of a sheet from a printing press cylinder, such as an impression cylinder, for removing the sheet from the cylinder and transferring it to the next printing unit or to a delivery unit. The trolleys are supported on the chains by resilient mountings which, following engagement of a sheet by the gripper, pivot the trolley under a spring biasing force to maintain substantially constant tension on the sheet throughout the period the sheet is being removed from the cylinder. Guide rails are provided which define a guide channel for guiding the trolleys into predetermined relation to the cylinder for engaging the sheet, and at such point, the guide rails are recessed to permit pivotal movement of the trolley under the biasing force of the spring mounting.

Apparatus for chain transfer conveyance of sheet printed in a press

A conveyor for a sheet-fed rotary printing press for transferring sheets away from an impression cylinder includes a delivery cylinder disposed adjacent the impression cylinder, and a chain conveyor having a plurality of sheet grippers, adapted for moving the grippers about the delivery cylinder for successively engaging sheets on the impression cylinder. The delivery cylinder has a gap in its outer periphery for receiving successive of the sheet grippers during transfer of a sheet from the impression cylinder to the sheet grippers. The sheet grippers each include a support and a pivotable gripper finger, and a displacer mounted on and extending rearwardly of each gripper support for bridging the gap in the delivery cylinder within which the gripper is disposed during a sheet transfer operation, and for maintaining tension in the sheet during transfer from the impression cylinder to the chain conveyor. The displacer is comb shaped having a plurality of rearwardly extending arcute shaped teeth. A sheet support comb also may be supported on the delivery cylinder with its teeth forwardly extending in intermeshing relation with the teeth of the displacer so as to completely bridge the gap within which the sheet gripper is disposed. Antismear rollers or like elements may be disposed on the teeth of the displacer and the sheet support comb to facilitate smooth transfer of the sheet away from the compression cylinder.

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Rodgau, Germany

Marco Bergmann