Abstract: There is described a sheet inspection system for a sheet-fed recto-verso printing press of the type comprising two printing cylinders (10, 20) for carrying out simultaneous recto-verso printing of the sheets, said sheet inspection system comprising at least one inspection device (200; 300; 400) for taking an image of one side of the printed sheets. The sheet inspection system comprises first and second transfer cylinders (60, 65) interposed between a first (10) of the two printing cylinders (10, 20) and a chain gripper system (5) of the printing press, printed sheets being transferred successively from the first printing cylinder (10) to the first transfer cylinder (60), to the second transfer cylinder (65), and to the chain gripper system (5).

Abstract: There is described an inspection system (10) for inspecting the quality of printed sheets which are transported by a sheet conveyor system comprising at least one sheet gripper system (3a, 3b) including a plurality of spaced-apart gripper bars (32) for holding the printed sheets by a leading edge thereof. The inspection system (10) comprises an optical quality control apparatus for carrying out inspection of a first side of the printed sheets while the printed sheets are being transported by the sheet gripper system (3b). The optical quality control apparatus includes a line camera (11) for scanning the first side of the printed sheets at an inspection location which is situated at a location proximate to a portion of the sheet gripper system (3b) where the gripper bars (32) transporting the printed sheets undergo a change of direction of displacement while the printed sheets are still being scanned by the line camera (11).

Abstract: The machine comprises at least a first sheet inspection unit with an inspection cylinder for transporting a printed sheet during inspection, an illumination means and a camera connected to an analysing device, an input transfer cylinder to bring the printed sheet to the at least one inspection unit and an output transfer cylinder to take away the printed sheet from the at least one inspection unit. The inspection unit and the transfer cylinders are arranged in such a manner that the output transfer cylinder takes away the inspected printed sheet only once the inspection is completed.

Abstract: The machine comprises at least a plate cylinder carrying printing plates with engravings corresponding to a specific intaglio structure to be printed, and cooperating with an impression cylinder, a collector cylinder (8) on which the ink in the different colors is deposited by selector cylinders (10), each selector cylinder (10) receiving ink of a given color from a duct roller (11) and each selector cylinder (10) is driven by drive means (20,21,22) in an independent manner.

Abstract: There is described process for producing security papers, in particular banknotes, comprising the step of sealing the surface of the security papers by applying a protective pattern on the surface of the security paper, which sealing comprising printing the security papers by intaglio printing using an intaglio printing plate with engraved areas such that at least 80% of the whole surface of each security paper is covered with embossed intaglio patterns produced by engraved areas of the intaglio printing plate which are inked or with a combination of embossed intaglio patterns and flat intaglio patterns, which flat intaglio patterns are produced by unengraved areas of the intaglio printing plate which are inked after wiping of the intaglio printing plate, at least a part of the embossed intaglio patterns and/or flat intaglio patterns being printed with a transparent or semi-transparent intaglio ink.

Abstract: There is described a method and system for producing notes of securities, in particular banknotes, wherein individual printed sheets or successive printed portions of a continuous web are cut into individual notes on a sheet-fed or web-fed processing system, and wherein these individual notes are subsequently processed by a single-note processing system comprising a plurality of single-note processing stations. Individual notes corresponding to independent production cycles or dependent production cycles are produced on the sheet-fed or web-fed processing system, each production cycle being processed on a separate one of the single-note processing stations.

Abstract: Intaglio printing press systems for recto-verso intaglio printing of sheets, in particular for the production of banknotes and the like securities, wherein first and second intaglio printing presses (1a, 1b) are operatively-coupled to one another by a sheet processing and transporting system (9) comprising an automated guided vehicle system for automatically transporting sheets from a sheet delivery station (8.1) of the first intaglio printing press (1a) where recto printing is performed to a sheet feeding station (1.2) of the second intaglio printing press (1b) where verso printing is performed.

Abstract: The machine comprises at least a printing cylinder (4), an inking cylinder (5) and a chain gripper transporting system (2,3) with grippers (17). The printing cylinder (4) comprises at least one transversal pit (7) for receiving said chain gripper system (3) such that the inking cylinder (5) inks the planar object (1) while said object (1) is held by said chain gripper system (3).

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: Disclosed is a clamping device (02) for fastening a plate (03) to the periphery of a cylinder (01). Said clamping device (02) comprises a first clamping element (04), a pivotally mounted second clamping element (06), a spring part (07), and a bracing element that is embodied as a pivotable spindle (08) and is movable between a clamping position in which the bracing element maintains the plate in a clamped state between the clamping elements and a released position in which the clamping elements release the plate. The spindle (08) is mounted in a groove so as to be displaceable, is fixed in an intermediate space between the spring part (07) and the second clamping element (06), and is pressed against the second clamping element by means of the spring part in the clamping position.

Abstract: The process comprises the following steps: —) deposition of a glueing material on the substrate; —) cutting of a window into the substrate and into the deposited glueing material; —) application of a layer of material at least over the cut window and activation of the glueing material.

Abstract: The letterpress printing machine includes an impression cylinder (8), at least one inking device (11, 12, 13) with an inking train comprising inking rollers (25, 26, 28) and at least one letterpress forme cylinder (14, 15, 16) inked by said at least one inking device (11, 12, 13). The at least one letterpress forme cylinder (14, 15, 16) is driven by first drive means (30), whereas the at least one inking device (11, 12, 13) is driven by second drive means (31, 32, 33), the second drive means (31, 32, 33) being mechanically independent from the first drive means (30). A control unit is coupled to the second drive means (31, 32, 33) to adjust a circumferential speed of the inking rollers (25, 26, 28) with respect to a circumferential speed of the letterpress forme cylinder (14, 15, 16) so as to adjust deposition of ink by the inking device (11, 12, 13) on the letterpress forme cylinder (14, 15, 16).

Abstract: The sheet-fed or web-fed printing machine comprises a main unit (1), at least one mobile carriage (2) adapted to be coupled to the main unit for cooperation therewith during printing operations and to be moved away from the main unit during maintenance operations, a control unit for controlling displacement of said mobile carriage toward and away from said main unit, and an access zone (9, 9?) surrounding at least partly the mobile carriage for allowing a human operator to get access to the main unit and mobile carriage, which access zone lies outside of the displacement path (10) of the mobile carriage. The printing machine further comprises detection means (11) for monitoring the access zone and detecting presence of a human operator within the access zone.

Abstract: There is described a sheet inspection system for a sheet-fed recto-verso printing press of the type comprising two printing cylinders (10, 20) for carrying out simultaneous recto-verso printing of the sheets, said sheet inspection system comprising at least one inspection device (200; 300; 400) for taking an image of one side of the printed sheets. The sheet inspection system comprises first and second transfer cylinders (60, 65) interposed between a first (10) of the two printing cylinders (10, 20) and a chain gripper system (5) of the printing press, printed sheets being transferred successively from the first printing cylinder (10) to the first transfer cylinder (60), to the second transfer cylinder (65), and to the chain gripper system (5).

Abstract: There is described a sheet inspection system for a sheet-fed recto-verso printing press of the type comprising two printing cylinders (10, 20) for carrying out simultaneous recto-verso printing of the sheets, said sheet inspection system comprising at least a first inspection device (100) for taking an image of a first side of the printed sheets. The first inspection device (100) comprises a first line image sensor (110) for performing line-scanning image acquisition of the first side of the printed sheets, and the first inspection device (100) is disposed in such a way that the first line image sensor visually acquires an image of a printed sheet while the said printed sheet is still adhering onto the surface of a first one (10) of the two printing cylinders (10, 20) of the printing press and immediately before the said printed sheet is transferred to a chain gripper system (5) of the printing press. Also described is a printing press equipped with the inspection system.

Abstract: The invention relates to a device for checking the quality of articles to be checked, comprising a first inspection device which detects image data of a surface on the front side of the article to be checked and an evaluation device which evaluates the quality of the article to be checked based on the detection result of the inspection device. A second inspection device is provided for detecting a rear side of the articles to be checked and a third inspection device is provided for illuminating the articles to be checked.

Abstract: The blanket cylinder for an intaglio printing machine comprising a plate cylinder carrying printing plates with engravings corresponding to a specific intaglio structure to be printed on a substrate, and cooperating with an impression cylinder, the blanket cylinder having at least one blanket on which the ink in the different colors is deposited by selector cylinders, each selector cylinder having reliefs with contours corresponding to the area of the intaglio structure to be inked with said color, the at least one blanket being made of several successive layers each with different properties.

Abstract: There is described a method for detection of occurrence of printing errors on printed substrates during processing thereof on a printing press comprising the steps of providing multiple sensors on functional components of the printing press to monitor the behaviour of the printing press during processing of the printed substrates and performing an in-line analysis of the behaviour of the printing press to determine occurrence of a characteristic behaviour of the printing press which leads or is likely to lead to occurrence of printing errors on the printed substrates or which leads or is likely to lead to good printing quality of the printed substrates. In-line analysis of the behaviour of the printing press preferably includes performing fuzzy pattern classification of the behaviour of the printing press. According to one embodiment of the proposed method in-line analysis of the behaviour of the printing press is coupled with an in-line optical inspection of the printed substrates.

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: A doctor blade device (01) for cleaning a surface has a doctor blade (03) and a tub (09) for receiving the material stripped from the surface by the doctor blade. The doctor blade is movable between a position in which it projects out of an opening (13) of the tub and a position in which it is submerged in the tub. A closure element (07) closes the opening in the submerged position of the doctor blade.