DEP (direct electrostatic printing) device with special printhead
AssigneeAgfa-Gevaert
InventorsJacques Leonard, Fran.cedilla.ois Backeljauw, Guido Desie, Andre Van Geyte
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Abstract
A device for direct electrostatic printing (DEP) including a back electrode, a printhead structure made from an insulating material and having a control electrode in combination with printing apertures, and a toner delivery apparatus that presents a cloud of toner particles in the vicinity of the printing apertures, in which the printhead structure is tightly stretched over a frame by means of lateral forces and the printhead structure has an overall flatness equal to or better than 50 .mu.m.
Claims17
A device for direct electrostatic printing (DEP) on a receiving substrate, comprising
- a back electrode,
- a thin printhead structure made from an insulating material and comprising a control electrode in combination with printing apertures,
- a frame,
- a means for tightly stretching said printhead structure over said frame by lateral forces applied to said printhead structure such that an area surrounding said printing apertures on a surface of said printhead structure opposing and closest to said receiving substrate has an overall flatness equal to or better than 50 .mu.m, and
- a means for delivering toner presenting a cloud of toner particles to said printing apertures.
Dependencies are inferred from the claim text.