Active charging to prevent image disruption

Abstract

An electrostatographic reproduction apparatus having a dielectric member transported about a path in sequential operative relation with electrographic process stations. The moving dielectric member is uniformly charged, and thereafter the uniform charge on the dielectrid member is selectively altered to form a latent image charge pattern thereon corresponding to information to be reproduced. The latent image charge pattern on the dielectric member is developed with triboelectrically charged pigmented marking particles. A receiver member is transported into operative association with a marking particle developed image on the dielectric member. An electrostatic charge is placed on the receiver member, such charge being of a polarity to induce transfer of a marking particle developed image from the dielectric member to the receiver member. The image bearing receiver member is transported along a path from the dielectric member to a fixing apparatus where a transferred developed marking particle image is fixed to the receiver member. A charger, located adjacent to the mechanism for transporting the image bearing receiver member, is for the purpose of placing a charge on a receiver member transported along the path from the dielectric member to the fixing apparatus, such charge being of the opposite polarity as the charge applied to the receiver member to effect transfer of the developed marking particle image to such receiver member.