Air Flow And Toner Flow - Gestetner B147 Service Manual

DEVELOPMENT

Air Flow and Toner Flow

[B]
[C]
[A]
[D]
[E]
[F]
[G]
B146D539.WMF
The air tube [F] and the toner tube [E] are connected to the joint [C] at the bottom
of the toner cartridge holder. This joint contains an inner pipe [A] and an outer pipe
[B]. These two pipes are L-shaped. The inner pipe goes through the outer pipe,
and is longer than the other.
The toner goes through the inner pipe [A], and reaches the toner tube [E] at the
bottom end of the pipe. On its way to the toner tube, the toner passes the sensor
windows [G]. These windows are at the front side and the rear side of the pipe, and
are transparent. The light emitted from the toner end sensor [D] goes through this
area if the toner is not going through the pipe.
The air flow generated by the air pump goes through the outer pipe [B], and comes
out of the four openings at the top end.
Toner Near End Detection
Toner end sensors [D] detect toner near end conditions ( 6.2.6).
SM 6-63 B147/B149/B190