Patent ID: 8503902

Claim:
An electrophotographic printer, comprising: a. a rotatable member; b. a carriage rotatable around an axis; c. first and second rotatable chargers mounted on the carriage, each adapted to selectively impart charge to a charge-bearing layer of the rotatable member; d. a cleaner adapted to selectively remove contaminants from the surface of either of the chargers; e. a carriage drive adapted to rotate the carriage to bring the first charger into contact with the rotatable member and the second charger into operative arrangement with the cleaner in a first position of the carriage, and to bring the second charger into contact with the rotatable member and the first charger into operative arrangement with the cleaner in a second position of the carriage; and f. a charger drive adapted to selectively rotate the charger in operative arrangement with the cleaner at a speed greater than a selected speed or with a torque greater than a selected torque; g. wherein the rotatable member rotates the rotatable charger in contact therewith at the selected speed with the selected torque.