Process and apparatus for developing a latent electrostatic...

Details Process and apparatus for developing a latent electrostatic... Process and apparatus for developing a latent electrostatic...

G - Physics

03

G

32/12.12, 117/3.

G03G 13/10 (2006.01) G03G 15/10 (2006.01)

Patent

CA 1062094

ABSTRACT OF THE DISCLOSURE A process and apparatus for developing a latent electrostatic image on an electrophotographic copying material by means of a toner dispersion. An infeed roller applies the toner dispersion to the copying material, and, downstream thereof, a distribution roller acts on the surface of the copying material. To solve the problem of reproducing fine white indicia, such as thin white lines, on a black background, a voltage, having the same polarity as the surface charge of the latent electrostatic image on the copying material, is applied to the distribution roller. Squeegee rollers downstream of the distribution roller effect removal of unused toner. Toner, which adheres to the distribution roller during application of voltage to the distribution roller, is sprayed off and recovered for recycling, the spraying agent being toner dispersion.

246044

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