Printing – Stenciling – Processes
Patent
1996-04-03
1998-04-14
Hilten, John S.
Printing
Stenciling
Processes
101DIG37, 347158, B41M 112, B41J 241
Patent
active
057380090
ABSTRACT:
Disclosed herein is a method for direct electrostatic printing with reduced banding, which comprising the steps of creating a potential difference between a back electrode and a magnetic brush assembly having a stationary mounted core and a sleeve rotatably mounted around the core, and rotating the sleeve at a rotational speed V.sub.rot which is higher than 100 rotations per minute; applying a developer with toner particles and magnetically attractable carrier particles on the magnetic brush assembly; creating a flow of toner particles directly from the magnetic brush assembly to the back electrode; interposing a printhead structure, having printing apertures and control electrodes around the printing apertures, between the magnetic brush assembly and the back electrode, for image wise controlling the flow of toner particles; passing a substrate at a speed V.sub.sub being equal to or larger than 10 cm/min between the printhead structure and the back electrode; image wise depositing toner particles on the substrate through the printing apertures; and fixing the toner particles to the substrate.
REFERENCES:
patent: 3487775 (1970-01-01), Chaney et al.
patent: 4393390 (1983-07-01), Aoki et al.
patent: 5230979 (1993-07-01), Chow et al.
patent: 5327169 (1994-07-01), Thompson
patent: 5541716 (1996-07-01), Schmidlin
Debie Herman
Desie Guido
AGFA-GEVAERT
Hilten John S.
Sandusky Amanda B.
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