Patent ID: 8469358
Filing Date: 2013-06-25
Classification: B41J,B65H

Abstract:
1. A sheet transport and registration apparatus comprising: a first and second plurality of rollers mounted to define a first plurality of roller pairs, each roller pair having at least one drive roller for contacting a surface of a sheet to be transported through a series of nips formed by the roller pairs, a registration plate for registering a side edge of the sheet, a drive mechanism for rotating the drive rollers to drive the sheet through the series of nips with a first drive force component in the transport direction and a second drive force component in a direction transverse to the transport direction for driving the transported sheet against the registration plate, and a contact pressure control mechanism to set a contact pressure at each roller pair that is sufficiently high that the sheet is engaged by the nip to be driven in the transport direction; and in the transverse direction when the side edge of the sheet is not registered at the registration plate, and that is sufficiently low that the sheet is driven in the transport direction but the sheet and the drive roller slide relative to one another in the transverse direction when an edge of the sheet is registered at the registration plate.