Patent ID: 6438332
Filing Date: 2002-08-20
Classification: G03G

Abstract:
A method for delivery of a toner cake layer having a high solids content to a receiving surface on a receiving member, comprising the steps of:providing a supply of high solids content liquid developing material; receiving a quantity of such liquid developing material and providing therefrom a layer of liquid developing material on a coating member, the coating member having a donor surface for receiving thereon the layer of liquid developing material so as to form a primary toner cake layer; inducing in at least one of the high solids content liquid developing material and the primary toner cake layer a first induced charge at a first polarity, such that the primary toner cake layer exhibits a uniform charge at the first polarity; inducing, to a selectable depth, a second induced charge of a second, opposing polarity in the primary toner cake layer, whereby an inner layer of the primary toner cake layer is made subject to the first polarity charge and an outer layer of the primary toner cake layer is made subject to the second polarity charge; presenting at least a portion of the primary toner cake layer to the receiving surface and inducing a selectable bias differential between the donor surface and the receiving surface, whereby the selectable bias differential causes the inner and outer layers to be respectively attracted to the donor surface and receiving surface; and separating the donor surface and the receiving surface so as to cause the outer layer to be transferred to the receiving surface as a secondary toner cake layer, while the inner layer remains on the donor surface.