Abstract: 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.

Abstract: The nozzle has a channel (24) in which a cleaning solution is injected under pressure, and an outlet (26) through which the solution is sprayed against a cylinder. The outlet (26) is formed by a first part (23) and a second part (25), said second part (25) being movable with respect to said first part (23) in order to vary the size of said outlet (26).

Abstract: The invention relates to a device for controlling material comprising a sensor device and a lighting device, whereby the material which is to be controlled is guided on a transparent drum.

Abstract: The invention concerns a device (01) for aligning at least along one edge several stacked sheets (09) into a book, while maintaining the serial order of sheets, said device comprising an editing table (11), having on one of its sides, a front stop (13) for aligning the edges of the sheets (09). The invention is characterized in that upstream of the editing table (11) is provided a support plate (02), whereon the sheet (09) can be set into a bound book with non-aligned edges, and is further provided in the device (01), a sheet feeder (08, 04, 06) whereby the sheets can be conveyed from the support plate (02) towards the front stop (13) of the editing table (11), while forming a stream of subjacent webs.

Abstract: The device enables the inspection (10, 11, 12), marking (9) or other processing or monitoring of a printed sheet (1), conveyed in register on a radial path by means of a rigid, rotating sheet conveying device (2, 3, 4, 5), from the inside, that is to say the concave side of the movement path.

Abstract: The web fed or sheet fed printing machine for security papers, in particular banknotes, possesses a principal printing group. It further has an additional, independent printing group (20) placed upstream of the principal printing group in the feed direction of the paper and allowing a pattern in at least one predetermined color to be printed over the entire width of the paper before the paper passes into the principal printing group.

Abstract: The wiping cylinder drive has a drive shaft (4) which is independent of the wiping cylinder shaft (2) and which, at its end facing away from the wiping cylinder, is connected to the drive member (15) with the aid of a claw coupling (10). Inserted between the adjacent claws of the constantly engaged claw coupling (10) is a gearwheel (20) which is made of elastically deformable material and the teeth (21) of which are in each case inserted positively between the flanks of adjacent claws of the two coupling parts and, in the case of sudden changes in the load torque of the wiping cylinder, function as damping elements. The drive member (15) has a gearwheel (17) which is constantly in engagement kinematically with the gear leading to the main motor of the printing machine.

Abstract: The invention relates to an impression cylinder (1) intended for a sheet-fed machine and having at least one cylinder gap (3) in which sheet grippers (4) are arranged in such a manner that, when closed, they do not project over the envelope of the peripheral area of the impression cylinder (1). The cylinder gap (3) is provided with a cover (7) which can be adjusted by a controlling unit (9, 10, 11, 12) and is subsequently always in its closed position in which it completely covers the cylinder gap (3), when said gap (3) passes through the nip. Consequently, the impression cylinder rolls with a continuous, closed peripheral area on the cylinder printing the image. In the zones where the sheet is transferred to and from the impression cylinder (1), the cover (7) (preferably controlled by a fixed cam (11) while the cylinder is rotating) is opened to such an extent that the sheet grippers (4) can move into the open position thereof to pick up or release a sheet.