Xerographic copying apparatus

Details Xerographic copying apparatus Xerographic copying apparatus

G - Physics

03

G

314/7

G03G 15/09 (2006.01) G03G 15/08 (2006.01)

Patent

CA 1207009

Abstract Xerographic copying apparatus A xerographic copying apparatus including a device for monitoring the concentration of toner in a xerographic developer composed of a mixture of ferromagnetic particles and non-ferromagnetic toner, said device comprising an measuring induction coil that is mounted close to the developer supply so that its magnetic field traverses a portion of the mass of the developer, and a reference induction coil that is mounted close to the measuring coil, but remote of the developer supply, and suitably closely against the hopper for the toner supply.

421284

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