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5.4 High Capacity Stacker
5.4.1 Delivered Sheets Are Severely Curled
Cause:
Sheets with downward curls cause strong friction at their leading edges. This may
result in paper misfeeds. Sheets will not be ejected completely and the trailing
edges will be left inside the paper exit.
If this happens, other sheets may slip under the delivered sheets, so that the
delivered sheets may be curled when loaded.
This is likely to occur if:
• A4 or larger coated paper weighing up to 135 g/m
2
(50 lb. Cover) is used.
<How the problem occurs>
(1) Downward curled paper is delivered to the stacker tray.
Paper feed direction
Stacker shift tray
Paper exit
Paddle
CEZ573
(2) The leading edge of the sheet, while delivered, causes strong paper-to-paper
friction against the top sheet of the stack. As there is no air gap between the
sheets, and the delivered sheet becomes stuck.
Paper feed direction
Stacker shift tray
Paper exit
Paddle
CEZ574
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