Patent ID: 8584832
Filing Date: 2013-11-19
Classification: B65H

Abstract:
1. A method for skew correction of a mailpiece while changing the orientation thereof, comprising the steps of: conveying the mailpiece along a path of travel by a conveyance system having first and second drive rollers, the mailpiece having a first orientation with respect to the path of travel; detecting a skew misalignment of the mailpiece at a first location along the path of travel while the mailpiece is in the first orientation; controlling the first and second rollers in accordance with a first skew correction motion profile the first skew correction motion profile effecting differential motion of the drive rollers to rotate and align the mailpiece with respect to the path of travel; conveying the mailpiece along the path of travel a predetermined distance downstream while the mailpiece is under the control of both the first and second drive rollers; stopping the mailpiece at a mailpiece stop position along the path of travel after the mailpiece has been conveyed the predetermined distance; and changing the orientation of the stopped mailpiece from the first orientation to a second orientation with respect to the path of travel by rotating the first and second drive rollers in opposite directions, conveying the mailpiece along the path of travel by the first and second drive rollers while in the second orientation; detecting a skew misalignment of the mailpiece at a second location along the path of travel downstream of the first location and while the mailpiece is in the second orientation; and controlling the first and second rollers in accordance with a second skew correction motion profile, the second skew correction motion profile effecting differential motion of the drive rollers to rotate and align the mailpiece with respect to the path of travel.