EP 4223548 A1 20230809 - METHOD FOR PRODUCING OF MARKED PAPER SUBSTRATE WITH THE MARK IN THE FORM OF A WATERMARK AND A MARKED SECURITY PAPER SUBSTRATE, IN PARTICULAR A SECURITY PAPER, OBTAINED BY SUCH A METHOD
Title (en)
METHOD FOR PRODUCING OF MARKED PAPER SUBSTRATE WITH THE MARK IN THE FORM OF A WATERMARK AND A MARKED SECURITY PAPER SUBSTRATE, IN PARTICULAR A SECURITY PAPER, OBTAINED BY SUCH A METHOD
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES MARKIERTEN PAPIERSUBSTRATS MIT WASSERZEICHENMARKIERUNG UND NACH DIESEM VERFAHREN HERGESTELLTES MARKIERTES SICHERHEITSPAPIERSUBSTRAT
Title (fr)
PROCÉDÉ DE FABRICATION D'UN SUPPORT PAPIER MARQUÉ AVEC UN FILIGRANE ET SUPPORT PAPIER DE SÉCURITÉ MARQUÉ, EN PARTICULIER UN PAPIER DE SÉCURITÉ
Publication
Application
Priority
PL 44002421 A 20211229
Abstract (en)
Method for manufacturing a paper substrate with a marking, with the steps: providing a paper substrate which can be fibrous paper; applying a mark to the substrate by irradiating it with an ultra-fast laser which is a femtosecond laser with a pulse below 400 fs, whose beam modifies the paper substrate, the mark being obtained by selective, local removal of paper substrate layers in the area defined on the basis of the desired image, and wherein the thinning of the paper substrate obtained by selectively locally removing layers of the paper substrate to produce the watermark in irradiating step is less than the thickness of the paper substrate, and the area over which it is applied does not differ in colour from the area not processed with an ultrafast laser. The resolution can be 900-1500 DPI. The paper can be uncoated and have 40-700 g.
IPC 8 full level
B42D 25/305 (2014.01); B42D 25/309 (2014.01); B42D 25/324 (2014.01); B42D 25/333 (2014.01); B42D 25/351 (2014.01); B42D 25/435 (2014.01)
CPC (source: EP)
B42D 25/305 (2014.10); B42D 25/309 (2014.10); B42D 25/324 (2014.10); B42D 25/333 (2014.10); B42D 25/351 (2014.10); B42D 25/435 (2014.10)
Citation (applicant)
- WO 9420679 A1 19940915 - ARJO WIGGINS SA [FR], et al
- US 2013255896 A1 20131003 - DOUBLET PIERRE [FR], et al
- EP 1743778 A2 20070117 - HARRIS COLIN AUSTIN [GB]
- EP 1122360 A1 20010808 - ARJO WIGGINS SA [FR]
- EP 0918649 B1 20000426 - LEAN B V [NL]
- WO 2004009371 A1 20040129 - GIESECKE & DEVRIENT GMBH [DE], et al
- SORIANO C. ET AL.: "Laser Engraving of Paper and Polymeric Materials for Tactile Detection", PROCEEDINGS OF SPIE - THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING, CONFERENCE MATERIALS, April 2009 (2009-04-01)
- RODE A.V. ET AL.: "Scanning the laser beam for ultrafast pulse laser cleaning of paint", APPL PHYS A, vol. 93, 2008, pages 135 - 139, XP019626866
Citation (search report)
[XI] EP 3900944 A1 20211027 - BUNDESDRUCKEREI GMBH [DE]
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
DOCDB simple family (application)
EP 22217014 A 20221228; PL 44002421 A 20211229