Global Patent Index - EP 1096451 A1

EP 1096451 A1 2001-05-02 - Detection method of semi-soft security features

Title (en)

Detection method of semi-soft security features

Title (de)

Verfahren zur halbweichen Sicherheitseinrichtungsdetektion

Title (fr)

Méthode de détection de dispositifs de sécurité mi-doux

Publication

EP 1096451 A1 (EN)

Application

EP 99203618 A

Priority

EP 99203618 A

Abstract (en)

A method for detecting the presence of a semi-soft magnetic or soft magnetic security feature in a substrate of a security article wherein this soft magnetic security feature has a magnetic saturation field ranging from 100 A/m to 1000 A/m, comprises following steps : (a) emitting an electromagnetic drive signal of one or more particular frequencies to an article so that any present semi-soft magnetic security features in the article go into saturation for both positive and negative magnetic fields; (b) detecting an electromagnetic detection signal (20) emanating from the article; (c) measuring the height (C) of the peaks of the detection signal ; (d) measuring the time or relative phase delays (B) between a reference point of the drive signal and a point at which the peaks occur; (e) comparing the measured heights and measured time or relative phase delays with values which are typical for semi-soft magnetic features. <IMAGE>

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

G08B 13/24

IPC 8 full level (invention and additional information)

G08B 13/24 (2006.01)

CPC (invention and additional information)

G08B 13/2408 (2013.01); G08B 13/2442 (2013.01); G08B 13/2471 (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 1096451 A1 20010502

INPADOC legal status


2002-11-27 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20011103

2002-03-14 [REG DE 8566] DESIGNATED COUNTRY DE NOT LONGER VALID

2002-01-23 [AKX] PAYMENT OF DESIGNATION FEES

2001-05-02 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

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

2001-05-02 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

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