Abstract: Sheets which are overlapped with an offset are supplied to a device for the continuous alignment of sheets by a stream feeder. After alignment of at least the front edge and one lateral edge of each sheet, the sheets can be transferred downstream to a following device.

Abstract: The invention relates to devices for aligning sheets (1), which are overlapped with an offset and supplied to the device by a stream feeder and which can be transferred to a device (63) that is located downstream, after alignment of the front edge and one lateral edge of the sheets. At least part of a sheet can be brought to rest on the periphery of an alignment cylinder (62), which is used to align the front edge of the sheet by means of front lay marks located on the periphery of said cylinder. At least one recess is provided on the periphery of the alignment cylinder, which, by the application of a negative pressure to said recess allows at least part of the sheet to be fixed by friction on the periphery of the alignment cylinder, in such a way that in the contact zone, drive forces from said cylinder can be transferred by friction to the sheet. A measuring device (64) determines the offset of a lateral edge of the sheet in relation to a predetermined set alignment.

Abstract: Sheets which are overlapped with an offset are supplied to a device for the continuous alignment of sheets by a stream feeder. After alignment of at least the front edge and one lateral edge of each sheet, the sheets can be transferred downstream to a following device.

Abstract: The machine further comprises a paper sheet feed device, a device for transporting the paper and a unit for applying security images (7) supported by at least one ribbon (8, 8a). The ribbon is brought into contact with the paper (1) so that the images (7) are applied at determined points on the paper. The application unit comprises an applicator cylinder (5) fitted with pads (52) in register with determined points on the sheets (1) and cooperates with a press cylinder (4), between which cylinders the paper (1) passes. The ribbon (8, 8a) is mounted between two reels (B1, B2) for paying out the ribbon and (25) for winding up the ribbon. The machine is equipped with a device (13) for preheating the ribbon (8, 8a) upstream of the applicator cylinder (5) so as to preheat the images (7) which will be applied to the sheet of paper (1) by simple contact of said pads (52) with the images (7) against the press cylinder (4).

Abstract: The invention relates to a method for conveyance of sheets, in which said sheets are advanced or slowed down in such a manner that a distance is altered. A value of said change in distance can be preselected.

Abstract: A device for conveying sheets in a sheet-processing machine uses a processing cylinder having a circumferential speed. Conveyor belts cooperate with the cylinder for transporting sheets with the belts arranged between the processing cylinder and a chain conveyor with a gripper system. A ratio between the transportation speed of the processing cylinder can be changed by use of a drive of the conveyor belts in order to vary the distance between successive sheets.

Abstract: A foil-stamping machine for applying patterns to sheets that can exchangeably accept stamping cylinders of different diameters. The stamping cylinder is exchanged by moving it in its axial direction. Sheet conveying means interact with the stamping cylinder and adapt to the diameter of the stamping cylinder. The stamping cylinder has at least one narrow suction strip extending in the axial direction and front marks arranged directly ahead of the suction strips for aligning the sheets on the stamping cylinder.

Abstract: An embossing cylinder for embossing a foil comprising a plurality of stamping dies, where the stamping dies are mounted on the cylinder through adjustable means allowing each of the dies to be adjusted in the axial direction and in the circumferential direction of the embossing cylinder.