An apparatus for validating sheets

(19)

(11)

EP 0 892 371 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	12.01.2000 Bulletin 2000/02

(43)	Date of publication A2:
	20.01.1999 Bulletin 1999/03

(21)	Application number: 98305397.6

(22)	Date of filing: 07.07.1998

(51)	International Patent Classification (IPC)⁷: G07D 7/00

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
	Designated Extension States:
	AL LT LV MK RO SI

(30)

Priority:

18.07.1997 GB 9715084

(71)	Applicant: NCR INTERNATIONAL INC.
	Dayton, Ohio 45479 (US)

(72)	Inventor:
	Leong, Liem H. Angus, Dundee DD5 3SF (GB)

(74)	Representative: Irish, Vivien Elizabeth et al
	International IP Department, NCR Limited, 206 Marylebone Road London NW1 6LY London NW1 6LY (GB)

(54)	An apparatus for validating sheets

(57) A self-service deposit terminal (10) is arranged to validate deposited bank notes. Each note (38) is individually transported past an interferometer (36) which is connected to a control unit (46). The output of the control unit (46) is input into a data processing means (26) which generates a value indicative of the surface roughness of the bank note. The value of roughness is compared with at least one stored reference value for genuine notes. The data processing means determines either solely on this comparison, or in conjunction with the output from a further validation means, whether the tested note is invalid.

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