EP 0786749 A1 19970730 - Deactivation device for electronic theft detection labels with improved reliability
Title (en)
Deactivation device for electronic theft detection labels with improved reliability
Title (de)
Deaktivierungsvorrichtung für elektronisches Warenüberwachungsetikett
Title (fr)
Dispositif de déactivation pour étiquette électronique antivol
Publication
Application
Priority
NL 1002150 A 19960123
Abstract (en)
The invention relates to an improvement of deactivation reliability of shoplifting detection labels in handling procedures at checkouts by means of acoustic and/or optical signalling. The detection system used therefor utilizes the difference in rate of change of the label detection signal level between a successful deactivation and a label which is removed from the field manually because it does not allow of deactivation. The detection system can also make use of the effect that a label signal, in a narrow time slot immediately after the deactivation signal, can no longer be detected in the case of a successful deactivation but can be detected in the case of manual removal of a still active label.
IPC 1-7
IPC 8 full level
G08B 13/24 (2006.01)
CPC (source: EP)
G08B 13/242 (2013.01)
Citation (search report)
- [X] EP 0454021 A1 19911030 - ACTRON ENTWICKLUNGS AG [CH]
- [X] EP 0287905 A1 19881026 - DURGO AG [CH]
- [X] EP 0499582 A1 19920819 - ACTRON ENTWICKLUNGS AG [CH]
- [X] WO 8704283 A1 19870716 - CHECKPOINT SYSTEMS INC [US]
Designated contracting state (EPC)
DE ES FR GB NL
DOCDB simple family (publication)
DOCDB simple family (application)
EP 97200166 A 19970122; NL 1002150 A 19960123