摘要:
The invention relates to a sheet-guiding drum in a sheet-processing machine, comprising a gripper system, a gripper shaft (34), and a gripper tube, and to a method for producing a gripper system. The problem addressed by the invention is that of further improving the transport process, in particular the turning process, in sheet-processing machines. The problem addressed by the invention is in particular designing a low-wear rolling-element bearing that preferably eliminates the aforementioned advantages and, in particular, meets all further boundary conditions. According to the invention, this problem is solved in that the gripper tube is assembled from tube segments (31).
摘要:
There is described a sheet-fed printing press for varnishing of security documents, including banknotes, comprising : - a sheet-feeder (01) for feeding individual sheets in succession, which sheets carry multiple security imprints ; - a varnishing group (03; 03*) for applying varnish onto recto and verso sides of the sheets, the varnishing group (03; 03*) comprising at least a first varnishing unit (31) to apply varnish on the recto side of the sheets and at least a second varnishing unit (32) to apply varnish on the verso side of the sheets ; and - a sheet-delivery system (04) for collecting varnished sheets coming from the varnishing group (03; 03*). The varnishing group (03; 03*) comprises at least one transfer cylinder or drum (35; 35, 36, 37) located between the varnishing group (03; 03*) and the sheet-delivery system (04), which at least one transfer cylinder or drum (35; 35, 36, 37) is designed as chill roller to cool down the varnished sheets or as an inspection cylinder or drum for carrying out inspection of the recto or verso side of the sheets.
摘要:
A printer is provided with: offset printing units (120 to 150) comprising impression cylinders (121a to 151a, 121b to 151b) for holding and transferring a sheet (101), blanket cylinders (122a to 152a, 122b to 152b) facing the impression cylinders (121a to 151a, 121b to 151b), plate cylinders (123a to 153a, 123b to 153b) facing the blanket cylinders (122a to 152a, 122b to 152b), and ink devices (124a to 154a, 124b to 154b) for supplying ink to the plate cylinders (123a to 153a, 123b to 153b); and an intaglio printing unit (180) comprising an impression cylinder (181) which receives the sheet (101) subjected to offset printing in the offset printing unit (150) and holds and transfers the sheet (101), an intaglio plate cylinder (182) facing the impression cylinder (181), ink supply means (183 to 185) for supplying ink to the intaglio plate cylinder (182), and the like.
摘要:
The present invention relates in particular to a sheet transfer cylinder (1), the sheets having previously been printed by screen printing with the aid of an ink that contains particles that are orientable under the effect of a magnetic field, this cylinder being in the form of a ring, - which has, opening out at its surface, a peripheral annular channel (3) in which at least one magnet (4) for orienting said particles contained in the ink is positioned; - and which has suction means that open out at said surface, away from the channel, in the form of at least one zone provided with perforations (110) for pressing said sheets against this surface, characterized in that said at least one zone provided with perforations (110) is in one piece with the rest of the ring.