Printing unit with reversible image setting and digital changeover
AssigneeMAN Roland Druckmaschinen AG
InventorJosef Schneider
Life of this patent
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Abstract
A printing unit for a rotary printing machine with reversible image setting and digital changeover by means of thermal transfer, having an image-setting unit, an erasing or cleaning component and at least one inking unit. In order to achieve further cost advantages and miniaturization for such a printing unit, in particular for use in small edition color printing (digital offset press), the form cylinder and blanket cylinder are combined into one cylinder. In order to produce the reversible setting of an image (form production), this cylinder is provided with a hydrophilic surface and interacts directly with an impression cylinder in order to print on a substrate. The image-setting unit and erasing or cleaning component and inking unit are set against this cylinder.
Claims5
A printing unit for a rotary printing machine with reversible image setting and digital changeover by means of thermal transfer, said printing unit comprising
- an impression cylinder,
- a reversibly imagable cylinder having a hydrophilic clastomeric surface on which an image can be set and erased, said reversibly imageable cylinder interacting with said impression cylinder in order to print on a substrate passing therebetween, said impression cylinder having a surface which is harder and has a higher elasticity than said hydrophilic elastomeric surface,
- a thermal transfer image setting unit which can be set against said reversibly imagable cylinder,
- an erasing and cleaning component which can be set against said reversibly imagable cylinder, and
- at least one inking unit which can be set against said reversibly imagable cylinder.
Dependencies are inferred from the claim text.