Cleaning device

A method for cleaning a surface of an image-delivering member, which is a part of a copying or printing system, this method comprises the steps of:

• contacting the outer surface of said image-delivering member with a cleaning brush for removing residual developer therefrom, said cleaning brush rotating in a first predetermined direction;
• establishing a rolling contact between said revolving brush and a collecting roller, said collecting roller rotating in a second predetermined direction;
• biasing said collecting roller such that an electrical field is generated which attracts the residual developer from said cleaning brush and collects it onto its surface;
• and
• scraping off said collected residual developer from said surface of said collecting roller with a cleaning blade, said cleaning blade having a forward end portion in frictional contact with the collecting roller at a contact position where the collecting roller is moving in an upward direction, said cleaning blade being mounted such that the contact angle (as hereinbefore defined) is less than 90 degrees.