Belt donor for direct electrostatic printing

Details Belt donor for direct electrostatic printing Belt donor for direct electrostatic printing

1989-12-18

1991-08-13

Fuller, Benjamin R.

Recorders

Electric recording

Electrochemical

3461601, 355259, G01D 1506, G03G 1506

Patent

active

050400045

ABSTRACT:
Direct electrostatic printing apparatus including structure for delivering developer/toner particles to a printhead forming an integral part of the printing device. The developer/toner delivery system insures even distribution to an apertured printhead structure. To this end, toner is deposited on a donor belt using a magnetic brush structure. The belt is entrained about a drive roller and an idler roller as well as a stationary mandrel. The mandrel is positioned opposite the printhead structure with a portion of the belt disposed intermediate thereof. The mandrel is provide with a flat area which is coplanar with the printhead structure. The flat area is coextensive with the space occupied a plurality rows of apertures in the printhead to thereby provide a uniform spacing between each row of apertures and the toner delivery belt.

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