The present invention uses a scavengeless development system in which toner detachment from a donor and the concomitant generation of a controlled powder cloud is obtained by AC electric fields supplied by self-spaced electrode structures positioned within the development nip. The electrode structure...http://www.google.com.au/patents/US4868600?utm_source=gb-gplus-sharePatent US4868600 - Scavengeless development apparatus for use in highlight color imaging
