Patent ID: 6889607
Filing Date: 2005-05-10
Classification: B41F,G01K

Abstract:
1. A method for mounting a printing master in the form of a foil or film on a printing form cylinder, which comprises: making ready a new print job with a given printing-image length by releasing an unwinding spool; activating a drive for the unwinding spool for moving the printing master a prescribed length in circumferential direction of the printing form cylinder on a circumferential surface of the printing form cylinder by drawing the printing master to a rewinding spool; braking the unwinding spool to build up tension in the printing master; locating an image start of a preceding print job on the circumferential surface of the printing form cylinder facing the rewinding spool; providing a control device for activating the drive for the unwinding spool; producing data in the control device regarding the length to be spooled forward, before activating the drive for the unwinding spool; fixing the rewinding spool and the unwinding spool, after advancing the printing master the prescribed length, for insuring tension in the printing master; determining a value of the length of the printing master to be spooled forward, being at most equal to a length of a printing image of the immediately preceding print job plus a printing image spacing; and calculating in a preceding print job, wherein partial images are present in the form of digital data, the length of the printing master to be spooled forward, by determining, for a partial image, the spacing of a screening pixel lying farthest away from the image start in the circumferential direction of the printing form cylinder.