Ceramic coating composition for a hybrid scavengeless development donor roll

A donor roll having a ceramic coating for use with an electrode structure in a scavengeless development unit of an electrostatographic printer. The ceramic coating consist essentially of a suitable mixture of alumina and titania by weight giving the donor roll a desired resistivity within a range of...

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Bibliographische Detailangaben
Hauptverfasser:	GILMORE, III, DANIEL R, KAZAKOS, ANN M
Format:	Patent
Sprache:	eng
Schlagworte:	BEARINGS BLASTING CINEMATOGRAPHY ELECTROGRAPHY ELECTROPHOTOGRAPHY ELEMENTS OR CRANKSHAFT MECHANISMS ENGINEERING ELEMENTS AND UNITS FLEXIBLE SHAFTS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING HOLOGRAPHY LIGHTING MAGNETOGRAPHY MECHANICAL ENGINEERING PHOTOGRAPHY PHYSICS ROTARY BODIES OTHER THAN GEARING ELEMENTS SHAFTS THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	A donor roll having a ceramic coating for use with an electrode structure in a scavengeless development unit of an electrostatographic printer. The ceramic coating consist essentially of a suitable mixture of alumina and titania by weight giving the donor roll a desired resistivity within a range of 2.0x107-4.2x108 (Ohm-cm), a discharge time constant of about 550 microseconds, and a dielectric constant within a range of 16-24 at 100.KHz.