| 摘要 |
The invention relates to an apparatus for printing onto a substrate printing plates manufactured from flexible material, comprising: a frame (2); a forme cylinder (15) mounted in the frame and adapted to receive the printing plate (16); a counter-pressure cylinder (27) mounted in the frame; guide means for carrying the substrate for printing between the forme cylinder (15) and the counter-pressure cylinder (27); drive means for driving the forme cylinder and the counter-pressure cylinder, wherein the drive means are adapted to drive the forme cylinder and the counter-pressure cylinder at a different peripheral speed. Assuming the situation where the forme cylinder is driven at the nominal speed and the flexible printing plate is intended for a forme cylinder with a smaller diameter, the flexible printing plate is fixed on the proof printing machine on a cylinder with a large diameter; stretching of the image of the flexible printing plate for printing is thus less than that taken into account in the manufacture of the flexible printing plate. In order to compensate this the counter-pressure cylinder is driven at a higher speed so that the substrate on which the proof must be made moves more rapidly, whereby the too small stretching of the image of the flexible printing plate for printing is compensated. <IMAGE>
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