Toner Supply Mechanism - Gestetner G060 Service Manual

DEVELOPMENT

6.5.6 TONER SUPPLY MECHANISM

[C]
[B]
Overview
An air transport system agitates the toner in the toner cartridges [A]. Toner is
transported from the toner cartridge to the development unit [B] by the toner
attraction pump [C] (each cartridge has a separate pump). This provides a more
stable way to transport a fine powder than previous methods.
Toner Agitation
The air pump supplies air to the toner cartridge and air mixes with the toner and
agitates all the toner in the cartridge. One air pump [D] and four valves [E] control
the air flow.
The air pump turns on to supply air to the toner cartridge for one second at the
following times:
• During normal operation, when the 'on' time for a toner supply clutch reaches
a certain value
• When forced toner supply (SP2-207) is done
• When forced toner density adjustment (SP3-126-2) is done
• At toner end recovery
• Developer initialization
The filter [F] in the inner package of the toner cartridge ensures that the internal
pressure does not become too high.
The toner mixed with air becomes a fluid, and passes part of the way along the
transport tube towards the toner attraction pump. This pump draws the toner the
rest of the way (see the next page).
G060
[D]
6-36
[E]
[A]
[F]
G060D313.WMF
SM