Patent ID: 7929897

Claim:
A cleaning apparatus for removing charged particles from a surface of an object, comprising: a cleaning brush configured to remove the charged particles from the surface of the object, moving in a given direction, by attracting the charged particles to the cleaning brush, the cleaning brush configured to attract the charged particles having positive and negative polarity from the object; a brush charge applicator configured to apply an electric charge to the cleaning brush; and a recovery unit, configured to recover the charged particles adhering to the cleaning brush, including: a recovery member configured to be supplied with a given voltage and configured to contact the cleaning brush to electrostatically attract the charged particles from the cleaning brush, the recovery member having a core made of a conductive material and a surface layer formed on the core, the surface layer being made of an insulating material; a first charge applicator configured to apply a given voltage polarity directly to the surface layer of the recovery member; a second charge applicator configured to apply a given voltage polarity directly to the core of the recovery member; and a voltage control unit configured to control a polarity of the given voltage to be applied by the first charge applicator and the second charge applicator depending on a polarity of the charged particles to be recovered by the recovery unit.