Metering strip
AssigneeMaschinenfabrik Wifag
InventorsHerbert Janser, Eugen Zwahlen, Peter Gertsch, Robert Imhof
Life of this patent
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Abstract
A metering strip for an ink fountain of a printing press for metering printing ink, especially a doctor blade, is fastened in a pivoting mount and has a cylindrically shaped edge with a radius in the range between 0.3 and 1.5 mm. The edge is pressed against an inking roller and forms a metering nip with this roller for the printing ink to be metered. Axial recesses merge on both sides of the metering strip with the cylindrically shaped, wear-resistant edge that covers an angular range of more than 180.degree..
Claims19
An inking system in combination with an offset printing press, the system comprising:
- an inking roller with a contact surface;
- an inking means for applying a first ink film to said contact surface of said inking roller, said first ink film having a first thickness;
- a metering strip including a cylindrical shaped edge surface in contact with said inking roller at a position angularly spaced down stream from said inking means, said cylindrical edge surface being pressed into said contact surface to form a metering nip for removing an excess portion of said first ink film and for forming a second ink film downstream of said metering strip, said second ink film having a second thickness less than said first thickness, said metering strip including a support portion extending along said cylindrical edge surface, said cylindrical edge surface extending over an angular range of greater than 180 degrees to form a transition portion with said support portion, said transition portion being shaped to define undercuts forming ink runoff means for guiding said excess portion of said first ink film away from said contact surface of said inking roller, said cylindrical edge surface having an axis of symmetry and said metering strip being pivotable about said axis.
Dependencies are inferred from the claim text.