Abstract: A printing unit of a sheet-fed printing press includes two cooperating screen-printing cylinders which are in direct contact. These two screen-printing cylinders define a printing gap through which the sheets to be printed pass during their printing step.

Abstract: A sheet processing device is provided in a sheet-fed printing press. Sheets are conveyed to a sheet transport cylinder and are processed on the sheet transport cylinder. The sheets are each removed twice from the sheet transport cylinder.

Abstract: A printing unit includes two screen-printing cylinders and two transfer cylinders that cooperate with the screen-printing cylinders and which define a printing gap or nip. At least one of the screen-printing cylinders has a screen surface and an interior doctor blade. A support element is provided for handling radially outwardly directed pressure exerted by the doctor blade on the screen surface in one section of the screen surface.

Abstract: A device and a method for processing valuable documents, such as securities, involves the separating of sheets of such documents into strips of documents. These strips are inspected and are subsequently cut into individual valuable documents, such as banknotes.

Abstract: The invention relates to a method for the regulation of a web tension in a rotary print machine, whereby the web (B) passes through at least two printing groups (06, 07, 08, 09). A change in the extension of the web during the run, is determined by means of a change in a phase shift between a first phase position of a printing group and a second phase position measured behind a last printing group. The change in phase position is compensated by means of a change in the tension (S) of the web before the first printing group.

Abstract: A sheet processing device is provided in a sheet-fed printing press. Sheets are conveyed to a sheet transport cylinder and are processed on the sheet transport cylinder. The sheets are each removed twice from the sheet transport cylinder.

Abstract: The invention relates to a method comprising the following steps: a stack of sheets is moved under a blade in order to cut a first free strip of the stack of sheets; the first strip is cut; the stack of sheets is subsequently moved, whereupon it executes a first rotation and is guided under the blade once again in order to cut a second free strip; the second strip is cut; the stack is subsequently moved, whereupon it executes a second rotation and is guided under the blade once again in order to cut a third free strip; the third free strip and successive stacks of bond paper strips are cut, and; the successive stacks of bond paper strips are cut into individual bond papers.

Abstract: The invention relates to a device for cutting paper webs (01) for forming several partial webs. The inventive device is arranged between an output of a printing machine and the input of a folder for folding the cut partial webs. Said device comprises a water jet cutting appliance (10).

Abstract: The invention relates to a printing unit (4) with a first screen-printing cylinder (12) that, together with a second cylinder (17), defines a printing gap (14), said printing unit being characterized in that the second cylinder (17) is likewise a screen-printing cylinder.

Abstract: In addition to a form cylinder (2) and a printing cylinder (1), an intaglio printer has at least one screen-printing cylinder (7) for transferring a screen printing ink to the form cylinder.

Abstract: A printing unit has two screen printing cylinders (12, 17) and a printing gap (14) formed by two cylinders (9, 16). At least the second cylinder of the two cylinders that form the printing gap is a transfer cylinder which co-operates with the second screen printing cylinder. A screen printing cylinder for the printing unit has a screen (23), a doctoring device which is situated radially inside said screen and a support element (36) which extends axially on the screen printing cylinder in the area of a limited peripheral section and which is used for sustaining a pressure exerted radially, outwards on the screen by the doctoring device when the limited peripheral section passes in front of said doctoring device.

Abstract: A cylinder drive for a rotary printing press uses bearing rings that are in contact with each other. A friction torque that is produced during the printing process, as a material passes between the cylinder which carry the bearing rings, is approximately compensated by an additional friction torque caused by the cooperating bearing rings.

Abstract: A sheet processing machine receives sheets from a sheet feeder. The sheets are inspected and their trailing ends are trimmed. Subsequently, the sheets are turned and are split into a plurality of partial sheets or sheet pieces. The now trailing ends of the sheet pieces are trimmed. The sheet pieces are separated axially and are delivered to a sheet receiving device where the individual sheet pieces are deposited in various stacks.

Abstract: A web guiding system for a web-fed rotary printing press includes a web guide roller which contacts the printed surface of a print-carrying web. The effective diameter of the transfer cylinder which prints the print-carrying web is the same as, or is an integral multiple of the diameter of the web guide roller.

Abstract: A sheet processing device is provided in a sheet-fed printing press. Sheets are conveyed to a sheet transport cylinder and are processed on the sheet transport cylinder. The sheets are each removed twice from the sheet transport cylinder.

Abstract: A sheet processing device is provided in a sheet-fed printing press. Sheets are conveyed to a sheet transport cylinder and are processed on the sheet transport cylinder. The sheets are each removed twice from the sheet transport cylinder.

Abstract: A pair of calender rollers are placed before, in a direction of travel of a paper web or paper sheets to a first print unit in a printing device. The calendering rollers improve the quality of the paper web or sheets by rolling particles adhering to the web or sheets into the web or sheets. A paper web tensioning device can be placed between the calendering rollers and the first print unit.

Abstract: A sheet processing device is provided in a sheet-fed printing press. Sheets are conveyed to a sheet transport cylinder and are processed on the sheet transport cylinder. The sheets are each removed twice from the sheet transport cylinder.

Abstract: Image areas that have been printed by specific printing plates or areas are coordinated with those specific plates or areas. A counter is coordinated with each specific image area and specific plate or area which prints it. If a predetermined number of faults are counted, a signal is generated and can be used to shut down the press or to advise the press operator of the existence of the recurring fault.

Abstract: The machine comprises a paper sheet-feed device (1), a device (2) for transferring toward a printing unit, a device for transferring printed sheets toward a unit (8) for checking the print quality and a storage unit (10, 11, 12). The printing unit can be altered to suit different types of security printing and consists of elements common to all these different types of printing. These common elements are: a screen-printing device (3, 4) comprising a screen stencil cylinder (3) cooperating with a press cylinder (4) and a drying/activation device (5) located downstream, followed by a transfer cylinder (6) for transferring toward a second press cylinder (7). The latter cooperates with at least one device (13) for printing a security element.