The invention relates to a printing machine for producing a security document (02); an impression cylinder (42) guiding a substrate (26) of the security document (02) and a transfer cylinder (43) cooperating with the impression cylinder (42) at a transfer point and printing a print image (27) onto the substrate (26) being provided; the substrate (26) including at least one transparent window (04); a micro-optical structure (03) composed of microlenses (11) being provided on one side of the substrate (26), at least in the region of the relevant transparent window (04); the impression cylinder (42) and the transfer cylinder (43) being arranged so as to cooperate in such a way that the micro-optical structure (03) composed of microlenses (11) is arranged on one side of the substrate (26), at least in the region of the relevant transparent window (04), and the at least one print image (27) is arranged on the other side of the substrate (26), located opposite this micro-optical structure (03), at least in the region of the transparent window (04); the relevant print image (27) including a plurality of image elements (28a to 28j) in a punctiform or linear grid which in each case have a hue different from white; a printing device applying a layer (39), which has a planar extension and covers the relevant print image (27), at least on a section of the relevant print image (27), on the side thereof facing away from the micro-optical structure (03) being provided; and this printing device being designed as at least one inkjet print head (46) and arranged downstream from the transfer point at which the transfer cylinder (43) prints the print image (27) onto the substrate (26) guided by the impression cylinder (42), on the same side of the substrate (26) as the print image (27) created at the transfer point; and the layer (39) created by the at least one ink jet print head (46) being made of a lighter hue than the hue different from white of which the relevant print image (27) is made.
B41F 11/02 - Rotary presses or machines having forme cylinders carrying a plurality of printing surfaces, or for performing letterpress, lithographic, or intaglio processes selectively or in combination for securities
B41F 19/02 - Apparatus or machines for carrying out printing operations combined with other operations with embossing
B41F 23/08 - Print-finishing devices, e.g. for glossing prints
A security document includes a transparent window formed in a substrate comprises a micro-optical structure composed of microlenses. A print image is formed on the other side of the substrate. The print image includes a plurality of image elements. The dot size or a line thickness of these image elements is smaller than a lens width of the microlenses. A layer covers the print image and is created in an ink jet printing method. This layer allows electromagnetic radiation having a wavelength in the range of 380 nm to 780 nm to pass. The degree of the transparency is in the range between 10% and 90%. The transparency is designed to gradually vary so that at least one area of the layer has different degree of transparency than other areas of this layer. A second print image can be provided on the layer visible after folding.
The invention relates to a device for aligning magnetic or magnetisable particles (P) which are contained in a coating agent (06) applied to a side of a strip-shaped or arcuate substrate (02), the device having a first aligning means (33; 33') which is arranged in the transport path of the substrate (02) to be conveyed and has a plurality of magnets (44) in the region of its side facing the transport path in order to align, in each case in a surface region having the coating agent (06), at least some of the particles (P) contained in the coating agent (06) in a defined manner in order to generate image information, wherein the magnets (44) of the first aligning means (33;33') which are used for the alignment and the substrate (02) which is supplied with the coating agent (06) containing the particles (P) move synchronously with one another at least on a portion of the transport path. At least one further aligning means (42; 43) which is attached to the frame on the transport path during operation and has a plurality of magnets (46; 47) which remain stationary in the device during operation is allocated in front of or opposite the first aligning means (33; 33') in the transport path of the substrate (02) to be conveyed. The invention further relates to a printing machine having such a device as well as to a method for aligning magnetic or magnetisable particles.
B41F 11/02 - Rotary presses or machines having forme cylinders carrying a plurality of printing surfaces, or for performing letterpress, lithographic, or intaglio processes selectively or in combination for securities
B41F 19/00 - Apparatus or machines for carrying out printing operations combined with other operations
B41F 23/00 - Devices for treating the surfaces of sheets, webs or other articles in connection with printing
B41F 23/04 - Devices for treating the surfaces of sheets, webs or other articles in connection with printing by heat drying, by cooling, by applying powders
The invention relates to devices for aligning magnetic or magnetizable particles, which are contained in a coating means (06) applied on one side of a substrate (02), which is in the form of a web or sheet, having a magnet cylinder (33), which is arranged in the transport path of the substrate (02) to be conveyed and, in the region of the outer circumference thereof, has a plurality of devices (34) effecting a magnetic field, or magnet devices (34) for short, wherein some or all of the magnet devices (34) comprise a magnet (44) which is rotatable by an associated motor (46). The magnet cylinder (33) is rotatably arranged in frame walls (38; 39) of a frame, and at least one transducer (63) for contactless transfer of electrical energy and/or control signals from the outside is provided in or on the rotating magnet cylinder (33), which comprises a transducer part (64) fixed to the frame and a transducer part (66) fixed to the cylinder during operation.
B41F 11/02 - Rotary presses or machines having forme cylinders carrying a plurality of printing surfaces, or for performing letterpress, lithographic, or intaglio processes selectively or in combination for securities
B41F 19/00 - Apparatus or machines for carrying out printing operations combined with other operations
patents
