METHOD AND APPARATUS FOR MARKING A PRODUCT

A method for producing markings (MRK1, MRK2) on a web (WEB1) comprises forming a first altered portion (DOT1) of the web (WEB1) by directing a laser beam (LB2) to the web (WEB1) so as to locally reduce the 5 fluorescence yield of the web (WEB1) at the location of the first altered portion (DOT1), wh...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	LEPPAENEN, TEUVO, LANNES, PETTERI, VIRTANEN, PASI
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BOOK COVERS BOOKBINDING CHECKING-DEVICES COLOUR PRINTING DECORATIVE ARTS 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 LINING MACHINES 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 PRINTING PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES PRODUCTION OF CELLULOSE PULP COMPOSITIONS SPECIAL DESIGNS OR PICTURES SPECIAL PRINTED MATTER STAMPS TEXTILES TRANSPORTING TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G TYPEWRITERS
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	A method for producing markings (MRK1, MRK2) on a web (WEB1) comprises forming a first altered portion (DOT1) of the web (WEB1) by directing a laser beam (LB2) to the web (WEB1) so as to locally reduce the 5 fluorescence yield of the web (WEB1) at the location of the first altered portion (DOT1), wherein the web (WEB1) comprises cellulose fibers and a fluorescent substance, and wherein the visual contrast between the first altered portion (DOT1) and a reference portion (REF1) is smaller than or equal to 5% when the web (WEB1) is illuminated by substantially white 10 visible light (VIS0), which does not contain ultraviolet light (UV0). Un procédé destiné à produire des marquages (MRK1, MRK2) sur une bande (WEB1) comprend l'étape consistant à former une première partie modifiée (DOT1) de la bande (WEB1) en dirigeant un faisceau laser (LB2) sur la bande (WEB1) de façon à réduire localement la production de fluorescence de la bande (WEB1) à l'emplacement de la première partie modifiée (DOT1). La bande (WEB1) est constituée de fibres de cellulose et d'une substance fluorescente. Le contraste visuel entre la première partie modifiée (DOT1) et une partie de référence (REF1) est inférieur ou égal à 5% quand la bande (WEB1) est éclairée par une lumière visible sensiblement blanche (VIS0), qui ne contient pas de lumière ultraviolette (UV0).