EP 0686292 B1 20000719 - COUNTERFEIT DOCUMENT DETECTION APPARATUS
Title (en)
COUNTERFEIT DOCUMENT DETECTION APPARATUS
Title (de)
VORRICHTUNG ZUM ERFASSEN VON VERFÄLSCHTEN DOKUMENTEN
Title (fr)
APPAREIL DE DETECTION DE DOCUMENTS CONTREFAITS
Publication
Application
Priority
- CN 93116487 A 19930713
- US 9401972 W 19940225
- US 2214593 A 19930225
- US 9306313 W 19930702
Abstract (en)
[origin: WO9419773A1] A document processing apparatus (10) incorporates a counterfeit detection system for identifying counterfeit suspect documents (22) on the basis of the magnetic characteristics of the documents (22). Each document (22) is transported within the vicinity of a magnet read head (86), which produces an electronic signal (210) in response thereto. The signal (210) from read head (86) is conditioned by a conditioning circuit (110) to be compatible with an analog-to-digital converter (304). The conditioning circuit (110) includes one or more amplifiers (130), a filter (140), a rectifier (160) and an integrator (180). The conditioned signal (220) from the integrator (180) is provided to the analog-to-digital converter (304) and is optionally limited to a compatible voltage level. As each document (22) is detected, a plurality of sampled values are obtained by the analog-to-digital converter (304). The sampled values are accumulated to produce one or more cumulative values (242, 274, 292, 404, 412) representative of the document (22). The cumulative values are compared with one or more predetermined reference values (263, 264, 276, 280, 282, 288, 402, 406, 410, 414) associated with a genuine document (22) in order to determine whether the detected document (22) is a counterfeit suspect document (22).
IPC 1-7
IPC 8 full level
G07D 7/00 (2006.01); G07D 7/04 (2006.01); G07D 7/12 (2006.01); G07D 11/00 (2006.01); G07F 7/08 (2006.01); G07F 19/00 (2006.01)
CPC (source: EP US)
G07D 7/04 (2013.01 - EP US); G07D 7/12 (2013.01 - EP US); G07D 11/10 (2019.01 - EP); G07D 11/16 (2019.01 - EP); G07D 11/50 (2019.01 - EP); G07D 11/60 (2019.01 - EP US); G07F 7/086 (2013.01 - EP); G07F 19/20 (2013.01 - EP US); G07F 19/203 (2013.01 - EP)
Citation (examination)
- US 4114804 A 19780919 - JONES ALAN P, et al
- EP 0295229 A2 19881214 - INTER INNOVATION AB [SE]
Designated contracting state (EPC)
AT DE ES NL
DOCDB simple family (publication)
WO 9419773 A1 19940901; AT E194876 T1 20000815; AU 6290294 A 19940914; CN 1048103 C 20000105; CN 1118631 A 19960313; DE 69425321 D1 20000824; DE 69425321 T2 20010301; EP 0686292 A1 19951213; EP 0686292 A4 19960501; EP 0686292 B1 20000719; ES 2151548 T3 20010101
DOCDB simple family (application)
US 9401972 W 19940225; AT 94912985 T 19940225; AU 6290294 A 19940225; CN 94191299 A 19940225; DE 69425321 T 19940225; EP 94912985 A 19940225; ES 94912985 T 19940225