Anti-counterfeit hologram

• Main Authors: KOSONEN HARRI, KOIVUKUNNAS PEKKA
• Format: Patent
• Language: Chinese; English
• Published: 01.07.2009
• Subjects: BOOK COVERS; BOOKBINDING; CINEMATOGRAPHY; DECORATIVE ARTS; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDEDFOR; ELECTROGRAPHY; FILES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HOLOGRAPHIC PROCESSES OR APPARATUS; HOLOGRAPHY; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; LOOSE LEAVES; MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FORSCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING; MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNERANALOGOUS TO PAPER; MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN AMANNER ANALOGOUS TO PAPER; MOSAICS; MOVABLE-STRIP WRITING OR READING APPARATUS; PAPERHANGING; PERFORMING OPERATIONS; PHOTOGRAPHY; PHYSICS; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITYFEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOTOTHERWISE PROVIDED FOR; PRODUCING DECORATIVE EFFECTS; SPECIAL PRINTED MATTER; TARSIA WORK; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TRANSPORTING; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUSTO PAPER

A microstructure area (201) providing a first diffractive visual effect is produced on the surface layer (240) of a paper or cardboard substrate (230) of a product (200). In addition, a bulge (206) or a recess (207) having a second microstructure area (202) is produced on the surface layer (240), wherein a doubly curved portion (203) is located between the first (201) and the second (202) microstructure areas. Said combination of the bulge (206) / recess (207), microstructure areas (201 , 202) and doubly curved portion (203) makes counterfeiting of the product (200) difficult and provides a special visual effect.