Color Development Roller - Ricoh FT2260 Service Manual

1 August 1988
Development
roller
[F] : Magnetic Rubber Layer
[G] : Conductor
[H] : Toner Supply Roller

5.2.3 Color Development Roller

Unlike the black toner development roller, the color development roller has an
insulating layer over the magnetic rubber layer. Floating electrodes [A] are
embedded in the insulating layer [B]. These floating electrodes are made of
carbon, which has a high coefficient of friction and a low electrical resistance,
and, thus, helps in creating triboelectric charge.
Color toner has a tendency to adhere to itself. So, a plastic film [C] is in-
stalled on the toner metering blade [D] to make sure only a thin coating of
color toner particles [E] adhere to the development roller. This film rubs
against the development roller increasing the triboelectric charge. This raises
the level of triboelectric charge to the point where color toner can fully
develop the latent image on the master belt.
[E]
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