THE ELECTROSTATIC TRANSPORTATION OF TONER
Original Publication Date: 1993-Apr-30
Included in the Prior Art Database: 2004-Apr-06
Xerox Disclosure Journal
Toner in a copier is transported electrostatically around it by means of a smooth-bore tube of dielectric material, which need not be straight. Wrapped around the tube are several helical windings which are insulated from each other. Electrostatic charges are applied to the windings in sequence, so as to produce a travelling wave of charge along the tube in the direction in which the toner is to be fed. One of the windings is uncharged so as to ensure that there is no flow of toner in the reverse direction.