Patent ID: 9170532
Filing Date: 2015-10-27
Classification: G03G

Abstract:
1. An apparatus for reducing registration errors in a media handling device, the apparatus comprising: an image-bearing member for interacting with sheets of substrate media as the sheets individually pass across the image-bearing member, each sheet pass corresponding to one of a series of iterations between the image-bearing member and the sheets, wherein the image-bearing member conveys marking material corresponding to an image; an actuator communicating motion to the image-bearing member; and a controller operatively coupled to the actuator, wherein the controller receives input signals from one or more sensors arranged to measure at least one disturbance to the image-bearing member at the location where the sheets pass across the image-bearing member with the image-bearing member conveying the marking material thereto, at least a portion of the input signals representing the at least one measured disturbance, each disturbance being defined by a pattern of image-bearing member movement away from and substantially returning to a reference state of motion, a repetition of the pattern being coincident with at least one of the iterations, wherein based on the measured disturbance, the reference state, an indication associated with when the pattern will repeat and one or more measured errors from past iterations, a modified signal is generated for the actuator to adjust the image-bearing member motion in coordination with the indication, wherein the at least one measured disturbance includes image-bearing member movement caused by at least one of sheet impact with and disengagement from the image-bearing member and the one or more measured errors from past iterations are ignored if the measured errors have not repeated multiple times.