Image forming device having control grid with applied voltage of

Details Image forming device having control grid with applied voltage of Image forming device having control grid with applied voltage of

1995-11-21

1996-09-24

Smith, Matthew S.

Photocopying

Contact printing

Light boxes

355251, 347 55, G03G 1506

Patent

active

055595863

ABSTRACT:
In the invention, toner on a toner carrier is charged with negative polarity and attracted by applying positive voltage to a backing electrode placed at the back of a transfer belt. Voltage is applied across the electrodes arranged crosswise in directions X and Y of the control grid disposed between the transfer belt and the toner is changed so as to vary the toner repulsing force in space-charged opening XY of the control grid and thereby to regulate the amount of toner passing therethrough.

REFERENCES:
patent: 4690539 (1987-09-01), Radulski et al.
patent: 4780733 (1988-10-01), Schmidlin
patent: 5036341 (1991-07-01), Larsson
patent: 5078087 (1992-01-01), Hogestyn
patent: 5121144 (1992-06-01), Larson et al.
patent: 5235354 (1993-08-01), Larson
patent: 5374949 (1994-12-01), Wada et al.

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