Ricoh Robin Service Manual page 45

DEVELOPMENT 24 June 1994
5.3 CROSS-MIXING
[E]
[A]
[D]
[B]
[C]
[F]
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 developer that stays on the development roller [B]
forms the magnetic brush and develops the latent image on the drum. The
remaining developer that is trimmed off by the doctor blade goes to the
backspill plate [C].
As the developer slides down the backspill plate to the agitator [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 auger
[F].
2-26