Printing press with in-line casting device for the replication and formation of a micro-optical structure

• Main Authors: Berthon, Aurélie, Palme, Martin, Kersten, Thomas, Stierman, Robert, Dimitrijevic, Ana
• Format: Patent
• Language: English
• Published: 03.10.2023
• Subjects: BOOK COVERS; BOOKBINDING; COLOUR PRINTING; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDEDFOR; FILES; LINING MACHINES; LOOSE LEAVES; MOVABLE-STRIP WRITING OR READING APPARATUS; PERFORMING OPERATIONS; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITYFEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOTOTHERWISE PROVIDED FOR; PRINTING; PRINTING MACHINES OR PRESSES; PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; SPECIAL PRINTED MATTER; STAMPS; TRANSPORTING; TYPEWRITERS

There is described a printing press adapted to carry out printing on a sheet-like or web-like substrate, in particular for the production of security documents such as banknotes, comprising a substrate feeding device for feeding the substrate to be treated, at least a printing unit designed to print a first side and/or a second side of the substrate and a delivery unit for receiving the treated substrate. The printing press in the conveying path for the substrate between the feeding device and the delivery unit further comprises an in-line casting device adapted to apply a layer of material acting as an optical medium on a portion of the second side of the substrate and to replicate and form a micro-optical structure in the layer of material acting as optical medium, wherein the printing unit comprises a first printing group comprising a printing cylinder and being adapted to print at least one printed pattern on the first or second side of the substrate in register with the micro-optical structure.