Invention Grant
- Patent Title: Colour laser marking methods of security document precursors
- Patent Title (中): 安全文件前体的彩色激光打标方法
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Application No.: US13885745Application Date: 2011-11-28
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Publication No.: US08786651B2Publication Date: 2014-07-22
- Inventor: Ingrid Geuens , Hubertus Van Aert , Paul Callant , Bart Waumans
- Applicant: Ingrid Geuens , Hubertus Van Aert , Paul Callant , Bart Waumans
- Applicant Address: BE Mortsel
- Assignee: Agfa-Gevaert N.V.
- Current Assignee: Agfa-Gevaert N.V.
- Current Assignee Address: BE Mortsel
- Agency: Leydig, Voit & Mayer, Ltd.
- Priority: EP10193893 20101207
- International Application: PCT/EP2011/071161 WO 20111128
- International Announcement: WO2012/076354 WO 20120614
- Main IPC: B41J2/435
- IPC: B41J2/435 ; B41M5/26 ; B41M3/14 ; B41M5/34 ; B41M5/42 ; B41M5/44 ; B41M5/323 ; B41M5/327 ; B41M5/337 ; B41M5/333
Abstract:
A method of color laser marking a security document precursor including, in order, at least: a) a polymeric foil; b) at least one colorless color forming layer for generating a color different from black containing at least an infrared absorber, a color forming compound and a polymeric binder; and c) either a lasermarkable polymeric support or a lasermarkable layer for generating a black color; comprising the steps of: (1) laser marking a color different from black in the colorless color forming layer with an infrared laser used in continuous wave mode; and (2) laser marking a black color by carbonization in the lasermarkable polymeric support or the lasermarkable layer with the same infrared laser used in a pulsed mode; and wherein at least one of the polymeric foil and the lasermarkable polymeric support is transparent for the infrared light of the infrared laser.
Public/Granted literature
- US20130235145A1 COLOUR LASER MARKING METHODS OF SECURITY DOCUMENT PRECURSORS Public/Granted day:2013-09-12
Information query
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