Recorders – Electric recording – Electrochemical
Patent
1990-07-02
1992-03-17
Miller, Jr., George H.
Recorders
Electric recording
Electrochemical
355247, G01D 1506, G03G 1508
Patent
active
050972774
ABSTRACT:
Direct Electrostatic Printer including a combination toner charging and delivery system. The combination toner charging and delivery system serves to convey well charged toner to an area adjacent an apertured printhead through which toner particles are propelled in image configuration. The system is provided with an annular channel in a generally cylindrical member through which toner laden air moves under pressure. During movement uncharged toner particles collide with a triboactive surface of the channel due to centrifugal force and become charged. The other surface delineating the channel carries a bias electrode thereon. The electrostatic field created by the bias prevents toner from colliding with the triboactive surface once it has reached a predetermined charge/mass ratio.
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Martin Robert G.
Schmidlin Fred W.
Miller Jr. George H.
Xerox Corporation
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