Apparatus and method for improved paper marking

Details Apparatus and method for improved paper marking Apparatus and method for improved paper marking

1992-03-03

1993-10-19

Miller, Jr., George H.

Recorders

Printing, dotting, or punching marker

Ink transfer support or moving means

355208, 355273, G01D 1506, G03G 2100, G03G 1514

Patent

active

052550230

ABSTRACT:
An apparatus for improved paper marking is provided which increases the percentage moisture content of the paper, thereby decreasing its electrical resistivity. The paper is then dried at selected pixels which results in high electrical resistivity of those pixels. Subsequently, the paper is charged with a high negative voltage. The areas with high moisture content rapidly discharge the applied charge, whereas the areas with low moisture content retain the charge. Finally, the areas with retained charge attract toner and are fused to the paper.

REFERENCES:
patent: 3677632 (1972-07-01), MacDonald, Jr.
patent: 4982225 (1991-01-01), Sakakibara et al.
patent: 5099281 (1992-03-01), Bhagat

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