INSTALLATION FOR TREATING SHEETS OF PRINTED PAPER

摘要

The invention concerns an installation comprising means controlling printing quality supplied by a printed sheet feeding device (1-3). Downstream, printing means (12-16) print serial numbers and/or affix other elements. The quality of the number printing is controlled by a control device (17). A transfer device (18) transports the sheets to a stock of three stacks (21, 22, 23) one of which collects the defective sheets. A marking device (19) affix a mark on the sheets considered unsuitable during the quality control.