Global Patent Index - EP 1066978 A3

EP 1066978 A3 2001-03-28 - Security of printing articles

Title (en)

Security of printing articles

Title (de)

Sicherheit von bedruckten Gegenständen

Title (fr)

Securité d'articles imprimés

Publication

EP 1066978 A3 (EN)

Application

EP 00113475 A

Priority

  • GB 9916166 A
  • GB 0007183 A

Abstract (en)

[origin: EP1066978A2] There is disclosed a security printing system involving the use of thermochromic inks printed on an article such as a lottery ticket or pre-paid telephone card having an amount of credit thereon for use in a mobile telecommunications network. Two layers of thermochromic ink are applied to the article each having a different and sufficiently separate activation temperatures at which a certain characteristic of the ink changes, for example its colour, opacity, transparency or translucency. The first applied layer, in the shape of a validation mark or the like, ideally has an activation temperature higher than the second layer applied thereover, so that two separate tests can be performed on the article. A first test is the application of heat to the mark by a human finger or the like whereupon the second layer becomes ideally transparent to revel the validation mark. The second test is the application of more heat, for example by a hairdryer or other dedicated heating apparatus, whereupon a particular characteristic of the first ink changes.

IPC 1-7 (main, further and additional classification)

B41M 3/14; B42D 15/10

IPC 8 full level (invention and additional information)

B41M 3/14 (2006.01)

CPC (invention and additional information)

B41M 3/14 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 1066978 A2 20010110; EP 1066978 A3 20010328; AU 4505700 A 20010118; CA 2312642 A1 20010109; CN 1280065 A 20010117; EA 200000624 A2 20010226; EA 200000624 A3 20010423; ID 26475 A 20010111; PL 341275 A1 20010115

INPADOC legal status


2001-10-24 [18W] WITHDRAWN

- Date of withdrawal: 20010829

2001-06-27 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010430

2001-03-28 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A3

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-03-28 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI

2001-01-10 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-01-10 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI