Integrated microchannel print head for electrographic printer

Details Integrated microchannel print head for electrographic printer Integrated microchannel print head for electrographic printer

1997-08-11

2000-03-14

Le, N.

Incremental printing of symbolic information

Electric marking apparatus or processes

Electrostatic

B41J 239, B41J 2395

Patent

active

06037957&

ABSTRACT:
Electrographic printing apparatus for forming a toner image on a recording medium includes: a magnetic brush having a rotatable magnetic core and a stationary outer shell; a developer supply for supplying a magnetic developer powder to the magnetic brush; a print head on the outer shell; and a receiver electrode arranged in spaced relation to the print head to define a recording region through which the receiver can be moved. The print head includes an array of microchannels for forming a plurality of parallel lines of developer in the channels, a corresponding plurality of transfer electrodes located in the microchannels for selectively transferring developer from the lines to a receiver, driver circuitry for generating and applying transfer signals to the transfer electrodes, a power supply connection for applying power to the drive circuitry, a print signal input connection for applying print signals to the print head, the print signal input including a number of electrical conductors fewer than the number of transfer electrodes, and a logic and control circuit for applying the print signals to the drive circuitry.

REFERENCES:
patent: 4764445 (1988-08-01), Miskinis et al.
patent: 5030974 (1991-07-01), Tange
patent: 5196890 (1993-03-01), Nakayama et al.
patent: 5440332 (1995-08-01), Good
patent: 5818476 (1998-10-01), Mey et al.
A. R. Kotz, Magnetic Stylus Recording, 1981, Society of Photographic Scientists and Engineers, pp. 44-49.

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