9.2 NEW TONER AND RECYCLED TONER MIXTURE
The mixture ratio of new toner and recycled toner affects copy quality.
New toner is supplied from the toner bottle to the opening [A] in the toner
supply unit [B] when the toner bottle drive motor rotates.
Recycled toner is transported to the opening [C] when the toner collection
coil in the cleaning unit and the recycled toner transport coil in the drum unit
are driven by the main motor. However, the new toner and the recycled toner
stop at the openings [A] and [C] until the transport coil [D] rotates. So the
new and recycled toner are only transported into the toner supply unit when
the transport coil is driven through the toner supply roller [E]; this occurs
when the toner supply clutch turns on while the main motor is running.
Therefore, recycled toner and new toner are supplied together to the interior
of the toner supply unit.
The transfer ratio of the toner on the OPC drum to the copy paper is about
80%, regardless of the proportion of black in the image. So 20% of the toner
always goes to the recycled toner inlet of the toner supply unit. When the
toner end sensor [F] indicates that more toner is needed, the toner supply
clutch turns on, and this recycled toner goes into the development unit with
new toner (about 80% of the mixture will be new toner).
As toner is supplied to the machine on successive occasions, the proportion
of recycled toner in the development unit will approach 20% over time, until
the developer is changed and the process starts again with all the toner in
the development unit being new toner.
[A]
[D]
[C]
[B]
Recycled
Toner
New
Toner
[E]
[F]
Rev. 7/95
Detailed
Descriptions
STM 2-75 A156/A160/A162
To Next Page
Loading...
Need help?
General
