Structured donor sheet for high-resolution non-impact printer
AssigneeEPP Corp.
InventorsDonald J. J. Lennon, Roger E. Clapp
Life of this patent
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Abstract
Structures for supporting printing articles in spaced aggregates as mounds and towers, for use in pulsed electrical printers, and method for their production. The structures comprise a base sheet having a roughened or microcavernous surface to receive the printing particles. The base sheet may be formed of or coated with conductive material, and may comprise a magnetizable material useful in forming and retaining the aggregates.
Claims13
A donor sheet useful in pulsed electrical printing, comprising
- a conductive base sheet having a microcavernous surface, and
- print particles having a conductivity at least that of a semi-conductor lying in spaced irregular mounds and towers on said surface, said donor sheet having a lateral surface D.C. resistivity less than 100,000 ohms per square.
A donor sheet useful in pulsed electrical printing, comprising a conductive base sheet having a microcavernous surface with pits or valleys of about 0.5-50 microns across and 0.5-50 microns deep and ridges and peaks of about 0.5-50 microns across and 0.5-50 microns high, and print particles having a conductivity at least that of a semi-conductor lying in irregular mounds and towers on said surface, said particles being about 0.25-15 microns across and present in quantity sufficient to effect printing by transfer of particles to an adjacent recipient sheet upon imposition of an electrical pulse of about 500 volts for two microseconds, said donor sheet having a lateral surface D.C. resistivity less than 100,000 ohms per square.
Dependencies are inferred from the claim text.