Print head in powder jet image forming apparatus having a matrix

Details Print head in powder jet image forming apparatus having a matrix Print head in powder jet image forming apparatus having a matrix

1994-11-07

1998-05-12

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347112, B41J 706

Patent

active

057513147

ABSTRACT:
In a print head for a powder jet image forming apparatus according to the present invention, a grid electrode is provided between first electrodes and a developer supply roller in parallel with major surfaces of an insulating layer, and therefore, a distance between any of the first electrodes and the grid electrode is kept fixed. Thus, applying a given level of voltage to the grid electrode allows an electric field for supplying developer to the first electrodes to arise uniformly. This is effective in avoiding uneven density in the resultant image.

REFERENCES:
patent: 4563613 (1986-01-01), Genovese et al.
patent: 5153611 (1992-10-01), Kokado et al.
patent: 5202704 (1993-04-01), Iwao

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