Ricoh FT5540 Service Manual page 77

5.4 CROSSMIXING
The crossmixing mechanism has two functions: it keeps the toner and developer evenly
mixed, and it helps to agitate the developer.
The developer that is attracted to the development roller at point [A] is split into two parts by
the doctor blade. One part [B] (the magnetic brush) goes on to develop the latent image on
the drum. However, the other part [C] is trimmed off by the doctor blade and directed to the
backspill plate [D].
As the developer slides down the backspill plate to the paddle roller, it is moved slightly toward
the front of the unit by the mixing vanes [E]. Part of the developer falls into the auger inlet [F]
and is transported to the rear of the unit by the mixing auger [G], where it drops onto the
paddle roller [H]. The amount of developer moved to the front by the mixing vanes and to the
rear by the mixing auger is equal.
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31 August 1989