Method and apparatus for ink feed control
AssigneeMAN Roland Druckmaschinen AG
InventorsSonke Herbst, Elmar Jung, Uwe Puschel, Peter Schramm
Life of this patent
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Abstract
A printing machine having an inking unit which prevents overinking of the printing cylinder upon increases in printing speed, such as during start-up of a printing operation. The inking unit includes an ink supply, two roll trains each comprising a plurality of inking rolls for communicating ink from the ink supply to a plurality of ink applicator rolls associated with the printing cylinder, with at least one inking roll in each roll train being displaceable in phase with an increase in printing speed for interrupting the respective roll train and preventing excessive ink application to the printing cylinder.
Claims10
A method of controlling the ink feed to a printing cylinder of a variable speed printing machine having an inking unit with an ink supply, a roll train comprising a plurality of inking rolls in contact with each other communicating with the ink supply, and at least one ink applicator roll communicating between said ink train and said printing cylinder comprising the steps of communicating ink from said ink supply to said printing cylinder via said roll train when said printing machine is operated at one printing speed, and interrupting said roll train at at least one point for at least some time in phase with an increase in printing speed for preventing excessive ink application to the printing cylinder.
The method of supplying ink to a printing cylinder of a variable speed printing machine having an ink supply and a printing cylinder with at least one ink applicator roller associated with the printing cylinder, comprising the steps of supplying ink to said printing cylinder via a roll train communicating between said ink supply and said at least one applicator roller during one printing speed, and interrupting said roll train in phase with an increase in printing speed of the printing machine to prevent the supply of excessive ink to said printing cylinder.
A variable speed printing machine comprising a printing cylinder, at least one applicator roll adjacent the printing cylinder for applying ink to the printing cylinder, an inking unit having an ink supply and a roll train having a plurality of inking rolls for communicating ink between said ink supply and said at least one inking applicator roll, and an actuator for moving at least one roll in said roll train to a thrown off position in phase with an increase in the printing speed of the printing machine for interrupting the ink flow through said roll train to said applicator roll.
Dependencies are inferred from the claim text.