Printing press for modifying hydrophobic and hydrophilic areas of a printing image carrier
AssigneeMAN Technologie GmbH
InventorsAlfred Hirt, Hartmut Fuhrmann
Life of this patent
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Abstract
For modifying the printing image on a printing image carrier within a printing press the printing image carrier is in the form of a material with ferroelectric properties. Electrodes with or without heat sources are used to delete and write matter on the printing image carrier by polarizing and depolarizing the respective parts of the printing image carrier or the ferroelectric material. The depolarized material is hydrophobic so that it accepts the printing ink whereas the polarized parts are hydrophilic and accept water.
Claims14
A printing press comprising a printing image carrier having a printing image represented by hydrophilic and hydrophobic areas for surface printing, and means for modifying such areas, such printing image carrier having a material with ferroelectric properties, such modifying means being adapted to locally polarize and depolarize said printing image carrier.
Dependencies are inferred from the claim text.