THREAD AND PRODUCTION METHOD THEREFOR, FORGERY PREVENTING FORM USING THREAD, AND FORGERY PREVENTING PRINTED MATTER, AND FORGERY JUDGING METHOD USING THEM

• Main Authors: SEKI, Kanako, MAEHIRA, Makoto, MURAKAMI, Toru, SHIMAMURA, Takashi
• Format: Patent
• Language: English; French; German
• Published: 14.06.2023
• Subjects: BOOK COVERS; BOOKBINDING; CHECKING-DEVICES; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDEDFOR; FILES; HANDLING OF COINS OR OF PAPER CURRENCY OR SIMILAR VALUABLEPAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING,DISPENSING, CHANGING OR DEPOSITING; IMPREGNATING OR COATING OF PAPER; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; LOOSE LEAVES; MOVABLE-STRIP WRITING OR READING APPARATUS; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; PERFORMING OPERATIONS; PHYSICS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITYFEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOTOTHERWISE PROVIDED FOR; PRODUCTION OF CELLULOSE; PULP COMPOSITIONS; SPECIAL PRINTED MATTER; TEXTILES; TRANSPORTING; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G

The invention provides a thread and counterfeit preventive paper satisfying the conditions that, when the micro-character of the thread is viewed from one side and opposite side of the paper or printed material, the image of micro-character can be recognized in the same direction from any side, not in opposite direction to each other, and that, when viewed from the opposite side, the image of the corresponding micro-character is not visible. The counterfeit preventive paper 10 and counterfeit preventive printed material have a structure in which a thread 1 having metal deposition layers 3, 4 formed in a pattern of micro-character and colored printed layers 7, 8 formed thereon provided on both sides of a strip-like and light permeable substrate 2 is inserted between paper layers 15a, 15b.