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AssigneeMAN Roland Druckmaschinen AG
InventorsToni Ehrhard, Georg Hartung, Manfred Herold, Ulrich Jung
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A method and apparatus for applying a liquid medium to a printing carrier in offset printing machines. It is suitable for processing media of different viscosity, such as low-viscosity dispersion lacquers or higher-viscosity bronze and effect printing inks. In order to guarantee precise metering, two function modules are assigned in an exchangeable manner to a forme cylinder in two bearings. If processing of low-viscosity media is required, the first function module, consisting at least of a metering roller and an applicator roller, is used. For processing higher-viscosity media, the second function module, consisting at least of a screened applicator roller and a chamber-type doctor, is used.
A method for applying different types of liquid media to the forme cylinder of offset printing apparatus having applicator roller means engageable with said cylinder and having laterally spaced bearings, said method comprising the steps of, supporting a metering roller with said bearings, moving said bearings to shift said metering roller into engagement with said applicator roller means, and metering a first liquid medium between said metering roller and said applicator roller means, moving said bearings reversely to shift said metering roller out of engagement with said applicator roller means, removing said metering roller from said bearings, supporting a chamber-type doctor with said bearings, moving said bearings to shift said chamber-type doctor into engagement with said applicator roller means, and metering a different liquid media onto said applicator roller means by way of said chamber-type doctor.
Apparatus for applying different types of liquid media to a forme cylinder, said apparatus comprising a first set of laterally spaced bearings, a second set of laterally spaced bearings, means for moving said first set of bearings toward and away from said second set of bearings, first and second different applicator rollers selectively supported by said second set of bearings and engageable with said forme cylinder and a metering roller and a chamber-type doctor selectively supported by said first set of bearings.
Dependencies are inferred from the claim text.