Electrographic recording apparatus

Electrographic apparatus providing electrographic stylus recording using magnetically attractable toner powder supplied to a recording region while electrical signals are applied to styli to deposit toner powder onto a receptor recording member. At least one side of the stylus array has a rotatable...

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Bibliographische Detailangaben
Hauptverfasser: LINDAHL, RICHARD W
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:Electrographic apparatus providing electrographic stylus recording using magnetically attractable toner powder supplied to a recording region while electrical signals are applied to styli to deposit toner powder onto a receptor recording member. At least one side of the stylus array has a rotatable sleeve member with an enclosed magnet disposed near the stylus array to remove excess toner powder that is magnetically drawn from the recording region. A toner removal means removes toner powder drawn to the sleeve member for return to a toner powder hopper. The toner removal means can be a stationary sleeve within which a rotatable magnetic assembly is carried. The stationary sleeve is positioned near the rotatable sleeve to remove toner powder that is carried by the rotatable sleeve. Toner powder is directed to a flange on the stationary sleeve and, then, to a pathway providing for return of the toner powder to the toner powder hopper. The toner removal means can also be a magnetic shunt member for the magnet and/or a blade member positioned near the rotatable sleeve member.