Ricoh B234 - Development Mechanism

DEVELOPMENT
SM 6-85 B234/B235/B236/D101/D102/D103
Detailed
Descriptions
6.12.2 DEVELOPMENT MECHANISM
Toner and developer are mixed in the toner agitator by the cross-mixing roller [A].
The paddle roller [B] picks up the developer and sends it to the upper development
roller [C]. Internal permanent magnets in the development rollers attract the
developer to the development roller sleeve. Developer from the upper development
roller sleeve is also attracted to the lower development roller [D].
The upper development roller carries the developer past the doctor blade [E] which
trims the developer to the desired thickness. Excess developer spills over the
separator [F] to the toner transport coil [G]. The coil transports the developer from
back to front as far as the cross-mixing roller.
In this machine, black areas of the latent image are at a low negative charge (about
–150 V) and white areas are at a high negative charge (about –800 V).
The development rollers continue to turn and carry the developer to the drum [H].
B234D940.WMF
[A]
[B]
[C]
[D]
[G]
[H]
[E]
[F]