G - Physics – 03 – G
Patent
G - Physics
03
G
32/12.14, 117/3.
G03G 13/10 (2006.01) G03G 15/10 (2006.01)
Patent
CA 1052635
ABSTRACT OF THE DISCLOSURE Disclosed is a method and apparatus for developing an electrostatic latent image on an electrophotographic film through use of a special developing chamber forming a passage- way through which electrostatically charged toner particles in a carrier liquid are conducted to contact the film and trough use of special toner flow control means. The chamber has an opening bordered by a mask against which the film is placed to form a seal, an inlet and an outlet through which liquid toner and drying air eater and leave the chamber. In the preferred embodiment the apparatus further includes supply means for providing liquid toner to the chamber, a conduit leading from the toner supply means to the inlet of the developing chamber, a toner valve through which the conduit passes, a needle orifice connected to the conduit and positioned in the inlet of the chamber, means for supplying drying air through an air valve to the inlet of the chamber, vacuum means connected to the outlet of the chamber for drawing the liquid toner and air through the chamber, and means for opening and closing alternatively the toner valve and the air valve to alter- nately draw liquid toner and drying air through the chamber. In the preferred embodiment is also a porous material located in the chamber passageway for absorbing sufficient liquid toner to remain wet during the drying step and avoid permanent toner deposition in the passageway.
223992
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