Patent ID: 8023852
Filing Date: 2011-09-20
Classification: G03G

Abstract:
1. An electrostatic image forming apparatus, comprising: a charge receptor, movable in a process direction, defining a main surface; a toner application device for applying toner to the charge receptor, and configured to place a lubrication stripe including the toner on a portion of the main surface of the charge receptor; a primary cleaning device for cleaning the main surface of the charge receptor, the primary cleaning device including at least one first corotron influencing the main surface of the charge receptor; a secondary cleaning device that engages the main surface of the charge receptor downstream of the primary cleaning device; at least one second corotron at a position along the process direction that is upstream of the secondary cleaning device and upstream of the at least one first corotron; a member of the primary cleaning device, the member capable of being electrically biased and having an effective area associated with the main surface relative to motion of the charge receptor in the process direction; and a control system that operates to modify an influence of the at least one second corotron on the charge receptor, during selected rotations of the charge receptor, while the portion of the main surface on which the lubrication stripe is formed, or will be formed, is passing the at least one second corotron, wherein: the control system modifies a bias on the member substantially during a time when the lubrication stripe is in the effective area of the member, the member being a cleaning brush, and during the selected rotations, a magnitude of the bias on the cleaning brush is reduced by about 50%.