Abstract

A print head element 200 part of an ionographic print head 313 is provided having a means 216 for introducing at one end an ionisable gas or gas mixture into a tubular channel 201, the print head element 200 further comprising a planar driver electrode 204 and a planar control electrode 205 both surrounding channel 201, a dielectric body (202, 203) keeping driver electrode 204 and control electrode 205 separate, means 208 for applying an alternating voltage for the ionization of the gas or gas mixture in channel 201, a modulation electrode 206 being separated from control electrode 205 by dielectric material 213, a means 211 for applying a direct current voltage between modulation electrode 206 and control electrode 205 to either block ions in channel 201 or to allow the flow out of ions from channel 201.

IPC Classes  ?

• B41J 2/415 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective supply of electric current or selective application of magnetism to a printing or impression-transfer material for electrostatic printing by passing charged particles through a hole or a slit