Abstract:
There is described a color control pattern (CP) for the optical measurement of colors printed on a sheet-like or web-like substrate (S) by means of a multicolor printing press, especially by means of a multicolor security printing press, which substrate (S) exhibits an effective printed region (EF) having a multicolor printed image comprising a plurality of juxtaposed colored areas (A-H) printed with a corresponding plurality of printing inks of different colors, wherein the color control pattern (CP) is printed in a margin portion (lm) of the substrate (S) next to the effective printed region (EF). The color control pattern (CP) comprises one or more color control strips (a-d) extending transversely to a direction of transport (T) of the substrate (S), each color control strip (a-d) comprising a plurality of distinct color control fields (CF, CF A to CF H ) consisting of printed fields of each relevant printing ink that is printed in the effective printed region (EF). The color control fields (CF, CF A to CF H ) are coordinated to actual usage of the relevant printing inks in the effective printed region (EF) and are positioned transversely to the direction of transport (T) of the substrate (S) at locations corresponding to actual positions where the relevant printing inks are applied in the effective printed region (EF).
Abstract:
There is described a method and an inking apparatus (50) for forming an ink pattern (80) on the surface of a form cylinder (15b) of a printing press, which ink pattern (80) exhibits, at least in part, a two-dimensional ink gradient extending in an axial direction and a circumferential direction on the surface of the form cylinder (15b). At least first and second chablon cylinders (20, 25) are placed one after the other along an inking path of the ink train (20, 25, 30, 31, 32, 33, 34, 35a, 35b, 36, 37) inking the form cylinder (15b) for distributing ink in the axial and circumferential directions and means (200, 201, 210, 211, 212, 250, 251, 260, 261, 262) are provided for subjecting the first and second chablon cylinders (20, 25) to cyclical oscillation movements in the axial direction and the circumferential direction.
Abstract:
The machine for securities, bank notes, passports, ID and other similar printed documents, in the form of planar sheets, comprises at least a sheet feeder (1), a printing unit (3,4,5,6,7,8,9) and a delivery unit (14) with delivery piles (15,16,17) for the printed sheets. The delivery unit (14) further comprises a laser perforating unit (18) for perforating said printed sheets.
Abstract:
The invention relates to a screening machine comprising a frame (04) and two bearing arrangements (02, 03) which are arranged thereon for the rotational positioning of a screening cylinder (01), whereby the bearing arrangements comprise rings (07) which are rotationally driven around a common axis and which support catches (13, 16, 42) on the sides opposite to each other. In order to enable the head piece (27) of the screening cylinder to be mounted on the ring, said catches can be positioned on one half of the periphery thereof.
Abstract:
There is described method of processing printed sheets (100), especially sheets of printed securities, into individual documents (150), such as banknotes, each printed sheet (100) comprising an array of imprints arranged in a matrix of rows and columns. The method comprises the following steps : (i) pre-processing the printed sheets (100) by partly slitting each printed sheet (100) row-wise or column-wise to form slits (110) between adjacent rows or adjacent columns of imprints, slitting being performed in such a manner that the adjacent rows or adjacent columns of imprints are still attached to one another at edges of each thus pre-processed printed sheet (100'); (ii) stacking the pre- processed printed sheets (100') so as to form sheet stacks (121, 122) comprising a predetermined number of pre-processed printed sheets (100') stacked one upon the other; and (iii) processing the sheet stacks (121, 122) by cutting each sheet stack (121, 122) column-wise or row-wise along cutting lines (115) between adjacent columns or rows of imprints, cutting being performed along a direction perpendicular to the direction of the slits (1 10) and in such a manner that individual documents (150) are produced as a result. Also described is a system for carrying out this method.
Abstract:
There is described a cylinder body (10) for orienting magnetic flakes contained in an ink or varnish vehicle applied on a sheet-like or web-like substrate, which cylinder body (10) has a plurality of magnetic-field-generating devices (50, 60) disposed on an outer circumference of the cylinder body (10). The cylinder body (10) comprises a plurality of distinct annular supporting rings (40) distributed axially along a common shaft member (20), each annular supporting ring (40) carrying a set of magnetic-field-generating devices (50, 60) which are distributed circumferentially on an outer circumference of the annular supporting rings (40).
Abstract:
There is described an intaglio printing press comprising (i) a stationary machine frame (01) supporting an intaglio printing cylinder (07) and an impression cylinder (06) contacting the intaglio printing cylinder (07), (ii) an inking system (12, 13, 16) for inking the intaglio printing cylinder (07), which inking system (12, 13, 16) comprises an ink-collecting cylinder (12) designed to contact the intaglio printing cylinder (07) and at least one inking device (13, 16) for supplying ink to said ink-collecting cylinder (12), and (iii) at least a first mobile carriage (11) supporting the ink-collecting cylinder (12), which first mobile carriage (11) is adapted to be moved with respect to the stationary machine frame (01) between a working position where the ink-collecting cylinder (12) contacts the intaglio printing cylinder (07) and a retracted position where the ink-collecting cylinder (12) is retracted away from the intaglio printing cylinder (07). The intaglio printing press further comprises a correcting and adjusting system (80) for correcting and adjusting a rotational position of the ink-collecting cylinder (12) with respect to a rotational position of the intaglio printing cylinder (07) to ensure proper circumferential register between the ink-collecting cylinder (12) and the intaglio printing cylinder (07).
Abstract:
A laser perforating system for applying at least one perforation pattern of micro-perforations onto printed sheets, in particular sheets for the production of securities, banknotes, passports, ID cards and other valuable documents, comprising: - a sheet transport system (11) for transporting the printed sheets along a transporting path; - a laser perforating unit (18) with at least one laser head (180) disposed along the transporting path of the sheet transport system (11) for perforating said printed sheets and carrying out the micro-perforations; and - a first aspiration unit (19) to maintain the printed sheets against an aspiration surface during perforation by said laser perforating unit (18), wherein said aspiration unit (19) is disposed between said laser perforation unit (18) and said transporting path of the sheet transport system (11), said aspiration unit (19) comprising at least one opening (190) in said aspiration surface (19a) through which is directed said at least one laser head (180).