PRE-STACKING
SM 29 B468/B469/B674
3000-Sheet
Finisher
B468/B469/
B674
2.4 PRE-STACKING
During a multiple copy job selected for stapling, the pre-stacking mechanism
delays the first two sheets of every set (after the first set) to allow enough time to
staple the preceding stack on the stapler tray. Pre-stacking is performed with the
first and second sheets for the second and all subsequent sets.
Shortly after the first sheet of the set enters the finisher, the pre-stack junction gate
solenoid [A] switches on, opens the pre-stack junction gate [B] and shunts the first
sheet to the paper pre-stack tray [C]. When the first sheet passes the pre-stack
roller [D], the pre-stack motor switches off and the sheet stops.
Shortly after the trailing edge of the first sheet enters the finisher, the solenoid
switches off, and the junction gate closes. This allows the second sheet of the set
to pass the closed junction gate and enter the main paper path [E].
At the prescribed time, the pre-stack motor switches on, and the pre-stack
transport roller [F] rotates and sends the first sheet to the stapler tray at the same
time as the second sheet arrives there.
All subsequent sheets of the same set are sent through the main paper path to the
stapler tray for stapling.
B468D011.WMF
[A]
[B] [C]
[D]
[E]
[F]
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