Patent ID: 8437646
Filing Date: 2013-05-07
Classification: B41J,B65H,G03G

Abstract:
1. A multi-feed detection and separation system, comprising: a gateless, dual nip, tri-roll device adapted to drive non-imaged sheets in a sheet feed direction with a first of said dual nips and away from said sheet feed direction with a second of said dual nips; a drive nip positioned downstream of said dual nip tri-roll device, said drive nip including a drive roll adapted to rotate only in a counter clockwise direction and a reversible pressure roll mating therewith, said reversible pressure roll being adapted to idle on said drive roll in said sheet feed direction when only one sheet is within said drive nip and reverse rotation direction when more than one sheet is within said drive nip to drive all sheets but the uppermost sheet in a direction reversed to said sheet feed direction; and a multi-feed sensor positioned upstream of said drive nip and adapted to send a signal to said reversible pressure roll only when more than one sheet is entering said drive nip.