A device for direct electrostatic printing (DEP) comprising individual control print and control back electrodes

摘要

A device for use in the technique of direct electrostatic printing (DEP) on an intermediate or final substrate is described, comprising :a receiving member support 5 having control back electrodes 5b and a common shield back electrode 5a ;a printhead structure 6 having control print electrodes 6a in combination with apertures 7 and a common shield print electrode 6b ;a toner delivery means 1 presenting a cloud 4 of toner particles in the vicinity of said apertures 7. The control print electrodes 6a in the printhead structure 6 and the control back electrodes 5b in the receiving member support 5 are positioned in a 1 to 1 relationship, and the control electrodes of both the printhead structure 6 and the receiving member support 5 are driven in an imagewise manner by a variable voltage source, in order to get a specific toner density on the receiving member substrate 9.