EP 1567363 A1 20050831 - LASER-WRITABLE FILM
Title (en)
LASER-WRITABLE FILM
Title (de)
LASERBESCHRIFTBARE FOLIE
Title (fr)
FEUILLE POUVANT ETRE MARQUEE AU LASER
Publication
Application
Priority
- DE 10256470 A 20021203
- EP 0350894 W 20031125
Abstract (en)
[origin: WO2004050380A1] The opaque inscription layer (2) is applied to a portion of the underside of the transparent top film (1) and is comprised of thin lamellar metal particles (3) incorporated into a matrix material (4) like a printing ink. The inscription layer (2) can be applied to the underside of the top film (1) using printing techniques. Aluminum flakes are particularly well-suited for use as the metal particles (3) and can be commercially obtained in particle sizes of around 15 ñm with submicron thicknesses. When viewed through the top film, the inscription layer has a silvery white color of a high brilliance. Due to the incorporated metal particles (3), the inscription layer (2) depicts a medium that can be locally modified by irradiating it with a laser beam. The particle structure is effectively destroyed at the location of laser irradiation whereby rendering the inscription layer (2) locally transparent. When the laser beam is displaced over the inscription layer (2) along a path, which corresponds to the desired inscription, it leaves behind the inscription in the form of a transparent track.
IPC 1-7
IPC 8 full level
B41M 5/24 (2006.01); B41M 5/26 (2006.01); B41M 3/14 (2006.01)
CPC (source: EP)
B41M 5/267 (2013.01); B41M 3/14 (2013.01)
Citation (search report)
See references of WO 2004050380A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2004050380 A1 20040617; AT E358026 T1 20070415; AU 2003298321 A1 20040623; DE 10256470 A1 20040624; DE 50306929 D1 20070510; EP 1567363 A1 20050831; EP 1567363 B1 20070328; ES 2285247 T3 20071116
DOCDB simple family (application)
EP 0350894 W 20031125; AT 03796055 T 20031125; AU 2003298321 A 20031125; DE 10256470 A 20021203; DE 50306929 T 20031125; EP 03796055 A 20031125; ES 03796055 T 20031125