Cross-Mixing - Ricoh FT4430 Service Manual

16 April '88

CROSS-MIXING

This copier uses a standard cross-mixing mechanism to keep the toner and
developer evenly mixed. It also helps agitate the developer to prevent
developer clumps from forming and helps create the triboelectric charge.
The developer on the turning development roller is split into two parts by the
doctor blade [A]. The part that stays on the development roller [B] forms the
magnetic brush and develops the latent image on the drum. The part that is
trimmed off by the doctor blade goes to the backspin plate
As the developer slides down the backspin plate to the paddle roller [D], the
mixing vanes [E] move it slightly toward the rear of the unit. Part of the
developer falls into the auger inlet and is transported to the front of the unit by
the mixing auger [F].
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[C].