Method of operating document feeding mechanism to detect and recover from a multi-feed condition and an apparatus therefor

(19)

(11)

EP 1 995 196 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	05.01.2011 Bulletin 2011/01

(43)	Date of publication A2:
	26.11.2008 Bulletin 2008/48

(21)	Application number: 08251381.3

(22)	Date of filing: 09.04.2008

(51)

International Patent Classification (IPC):

B65H 7/06^(2006.01)
B65H 7/12^(2006.01)

B65H 5/06^(2006.01)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
	Designated Extension States:
	AL BA MK RS

(30)

Priority:

24.05.2007 US 805780

(71)	Applicant: NCR Corporation
	Duluth, GA 30096 (US)

(72)	Inventor:
	Dunn, Frank B. Waterloo Ontario, N2L 4T7 (CA)

(74)	Representative: MacLeod, Roderick William et al
	NCR Limited Architecture & Technology Discovery Centre 3 Fulton Road Dundee DD2 4SW 3 Fulton Road Dundee DD2 4SW (GB)

(54)	Method of operating document feeding mechanism to detect and recover from a multi-feed condition and an apparatus therefor

(57) A method is provided of operating a document feeding mechanism having a document feed path which extends through a nip defined between an advance roller (32) disposed on one side of a document feed path and a retard roller (36) disposed on an opposite side of the document feed path. The method comprises detecting a multi-feed condition in which a first document (60) and a second document (62) overlapping the first document have been fed through the nip from an upstream end of the document feed path to a downstream end of the document feed path, and controlling operation of the advance roller (32) and the retard roller (36) such that the second document (62) is driven backwards through the nip to allow the first document (60) to be fed through the nip by itself in a non-overlapping manner without any human intervention.

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