Lithographic Printing Press Make-Ready Method
AssigneeEco3 BV
InventorsThomas Billiet, Willem Cortens
Life of this patent
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Abstract
A method for setting up a lithographic printing press is provided which allows to reduce the amount of waste copies that is created during the press make-ready time. The method provides the use of paper that was already used in the press make-ready process of a previous print run and includes a first color bar; the method includes the step of exposing a second color bar at a position on the printed copies which is different from the position of the first color bar.
Claims21
1-15. (canceled)
A method for setting up a lithographic printing press which includes at least one print station having an inking system and a plate cylinder, the method comprising the steps of:
- (a) preparing a printing plate precursor by exposing an image in an area of the lithographic printing plate precursor, and a color bar CB-02 outside said area;
- (b) mounting the exposed plate precursor on the plate cylinder of the printing press;
- and
- (c) carrying out a make-ready process for bringing the printing press to production quality which is defined by target color data on printed copies produced by the printing press, said press make-ready process comprising the steps of:
- (c-i) feeding a number of sheets through the printing press thereby producing printed copies of the image and of the color bar CB-02;
- (c-ii) measuring color data on the printed copies of the color bar and adjusting the inking system in accordance with the difference between the measured color data and the target color data;
- and
- (c-iii) repeating step (c-i and c-ii) until the measured color data match the target color data,
- wherein the sheets which are fed through the printing press in step (c-i) are sheets which have already been used in the press make-ready process of another print run and include at least a previous color bar CB-01 at a position on the printed copies which is different from the position of the color bar CB-02 exposed in step (a).
Dependencies are inferred from the claim text.